dpsoftrast.c

   1
   2 #include <memory.h>
   3 #include "dpsoftrast.h"
   4 #include <stdio.h>
   5 #include <math.h>
   6
   7 #undef true
   8 #undef false
   9 #ifndef __cplusplus
  10 typedef enum bool {false, true} bool;
  11 #endif
  12
  13 #if defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER >= 1400)
  14 #define RESTRICT __restrict
  15 #else
  16 #define RESTRICT
  17 #endif
  18
  19 #define GL_NONE                                 0
  20 #define GL_FRONT_LEFT                   0x0400
  21 #define GL_FRONT_RIGHT                  0x0401
  22 #define GL_BACK_LEFT                    0x0402
  23 #define GL_BACK_RIGHT                   0x0403
  24 #define GL_FRONT                                0x0404
  25 #define GL_BACK                                 0x0405
  26 #define GL_LEFT                                 0x0406
  27 #define GL_RIGHT                                0x0407
  28 #define GL_FRONT_AND_BACK               0x0408
  29 #define GL_AUX0                                 0x0409
  30 #define GL_AUX1                                 0x040A
  31 #define GL_AUX2                                 0x040B
  32 #define GL_AUX3                                 0x040C
  33
  34 #define GL_NEVER                                0x0200
  35 #define GL_LESS                                 0x0201
  36 #define GL_EQUAL                                0x0202
  37 #define GL_LEQUAL                               0x0203
  38 #define GL_GREATER                              0x0204
  39 #define GL_NOTEQUAL                             0x0205
  40 #define GL_GEQUAL                               0x0206
  41 #define GL_ALWAYS                               0x0207
  42
  43 #define GL_ZERO                                 0x0
  44 #define GL_ONE                                  0x1
  45 #define GL_SRC_COLOR                            0x0300
  46 #define GL_ONE_MINUS_SRC_COLOR                  0x0301
  47 #define GL_DST_COLOR                            0x0306
  48 #define GL_ONE_MINUS_DST_COLOR                  0x0307
  49 #define GL_SRC_ALPHA                            0x0302
  50 #define GL_ONE_MINUS_SRC_ALPHA                  0x0303
  51 #define GL_DST_ALPHA                            0x0304
  52 #define GL_ONE_MINUS_DST_ALPHA                  0x0305
  53 #define GL_SRC_ALPHA_SATURATE                   0x0308
  54 #define GL_CONSTANT_COLOR                       0x8001
  55 #define GL_ONE_MINUS_CONSTANT_COLOR             0x8002
  56 #define GL_CONSTANT_ALPHA                       0x8003
  57 #define GL_ONE_MINUS_CONSTANT_ALPHA             0x8004
  58
  59 typedef enum DPSOFTRAST_ARRAY_e
  60 {
  61         DPSOFTRAST_ARRAY_POSITION,
  62         DPSOFTRAST_ARRAY_COLOR,
  63         DPSOFTRAST_ARRAY_TEXCOORD0,
  64         DPSOFTRAST_ARRAY_TEXCOORD1,
  65         DPSOFTRAST_ARRAY_TEXCOORD2,
  66         DPSOFTRAST_ARRAY_TEXCOORD3,
  67         DPSOFTRAST_ARRAY_TEXCOORD4,
  68         DPSOFTRAST_ARRAY_TEXCOORD5,
  69         DPSOFTRAST_ARRAY_TEXCOORD6,
  70         DPSOFTRAST_ARRAY_TEXCOORD7,
  71         DPSOFTRAST_ARRAY_TOTAL
  72 }
  73 DPSOFTRAST_ARRAY;
  74
  75 typedef struct DPSOFTRAST_Texture_s
  76 {
  77         int flags;
  78         int width;
  79         int height;
  80         int depth;
  81         int sides;
  82         DPSOFTRAST_TEXTURE_FILTER filter;
  83         int mipmaps;
  84         int size;
  85         unsigned char *bytes;
  86         int mipmap[DPSOFTRAST_MAXMIPMAPS][5];
  87 }
  88 DPSOFTRAST_Texture;
  89
  90 typedef struct DPSOFTRAST_State_User_s
  91 {
  92         int colormask[4];
  93         int blendfunc[2];
  94         int blendsubtract;
  95         int depthmask;
  96         int depthtest;
  97         int depthfunc;
  98         int scissortest;
  99         int cullface;
 100         int alphatest;
 101         int alphafunc;
 102         float alphavalue;
 103         int scissor[4];
 104         int viewport[4];
 105         float depthrange[2];
 106         float polygonoffset[2];
 107         float color[4];
 108 }
 109 DPSOFTRAST_State_User;
 110
 111 #define DPSOFTRAST_MAXSUBSPAN 16
 112
 113 typedef struct DPSOFTRAST_State_Draw_Span_s
 114 {
 115         int start; // pixel index
 116         int length; // pixel count
 117         int startx; // usable range (according to pixelmask)
 118         int endx; // usable range (according to pixelmask)
 119         unsigned char mip[DPSOFTRAST_MAXTEXTUREUNITS]; // texcoord to screen space density values (for picking mipmap of textures)
 120         unsigned char *pixelmask; // true for pixels that passed depth test, false for others
 121         // [0][n][] is start interpolant values (projected)
 122         // [1][n][] is end interpolant values (projected)
 123         // [0][DPSOFTRAST_ARRAY_TOTAL][] is start screencoord4f
 124         // [1][DPSOFTRAST_ARRAY_TOTAL][] is end screencoord4f
 125         // NOTE: screencoord4f[3] is W (basically 1/Z), useful for depthbuffer
 126         float data[2][DPSOFTRAST_ARRAY_TOTAL+1][4];
 127 }
 128 DPSOFTRAST_State_Draw_Span;
 129
 130 #define DPSOFTRAST_DRAW_MAXSPANQUEUE 1024
 131
 132 typedef struct DPSOFTRAST_State_Draw_s
 133 {
 134         int numvertices;
 135         int maxvertices;
 136         float *in_array4f[DPSOFTRAST_ARRAY_TOTAL];
 137         float *post_array4f[DPSOFTRAST_ARRAY_TOTAL];
 138         float *screencoord4f;
 139
 140         // spans are queued in this structure for dispatch to the pixel shader,
 141         // partly to improve cache locality, partly for batching purposes, spans
 142         // are flushed before DrawTriangles returns to caller
 143         int numspans;
 144         DPSOFTRAST_State_Draw_Span spanqueue[DPSOFTRAST_DRAW_MAXSPANQUEUE];
 145 }
 146 DPSOFTRAST_State_Draw;
 147
 148 #define DPSOFTRAST_VALIDATE_FB 1
 149 #define DPSOFTRAST_VALIDATE_DEPTHFUNC 2
 150 #define DPSOFTRAST_VALIDATE_BLENDFUNC 4
 151 #define DPSOFTRAST_VALIDATE_DRAW (DPSOFTRAST_VALIDATE_FB | DPSOFTRAST_VALIDATE_DEPTHFUNC | DPSOFTRAST_VALIDATE_BLENDFUNC)
 152
 153 typedef enum DPSOFTRAST_BLENDMODE_e
 154 {
 155         DPSOFTRAST_BLENDMODE_OPAQUE,
 156         DPSOFTRAST_BLENDMODE_ALPHA,
 157         DPSOFTRAST_BLENDMODE_ADDALPHA,
 158         DPSOFTRAST_BLENDMODE_ADD,
 159         DPSOFTRAST_BLENDMODE_INVMOD,
 160         DPSOFTRAST_BLENDMODE_MUL,
 161         DPSOFTRAST_BLENDMODE_MUL2,
 162         DPSOFTRAST_BLENDMODE_SUBALPHA,
 163         DPSOFTRAST_BLENDMODE_PSEUDOALPHA,
 164         DPSOFTRAST_BLENDMODE_TOTAL
 165 }
 166 DPSOFTRAST_BLENDMODE;
 167
 168 typedef struct DPSOFTRAST_State_s
 169 {
 170         // DPSOFTRAST_VALIDATE_ flags
 171         int validate;
 172
 173         int fb_colormask;
 174         int fb_width;
 175         int fb_height;
 176         unsigned int *fb_depthpixels;
 177         unsigned int *fb_colorpixels[4];
 178
 179         const float *pointer_vertex3f;
 180         const float *pointer_color4f;
 181         const unsigned char *pointer_color4ub;
 182         const float *pointer_texcoordf[DPSOFTRAST_MAXTEXCOORDARRAYS];
 183         int stride_vertex;
 184         int stride_color;
 185         int stride_texcoord[DPSOFTRAST_MAXTEXCOORDARRAYS];
 186         int components_texcoord[DPSOFTRAST_MAXTEXCOORDARRAYS];
 187         DPSOFTRAST_Texture *texbound[DPSOFTRAST_MAXTEXTUREUNITS];
 188
 189         int shader_mode;
 190         int shader_permutation;
 191         float uniform4f[DPSOFTRAST_UNIFORM_TOTAL*4];
 192         int uniform1i[DPSOFTRAST_UNIFORM_TOTAL];
 193
 194         // derived values (DPSOFTRAST_VALIDATE_FB)
 195         int fb_clearscissor[4];
 196         int fb_viewport[4];
 197         int fb_viewportscissor[4];
 198         float fb_viewportcenter[2];
 199         float fb_viewportscale[2];
 200
 201         // derived values (DPSOFTRAST_VALIDATE_DEPTHFUNC)
 202         int fb_depthfunc;
 203
 204         // derived values (DPSOFTRAST_VALIDATE_BLENDFUNC)
 205         int fb_blendmode;
 206
 207         int texture_max;
 208         int texture_end;
 209         int texture_firstfree;
 210         DPSOFTRAST_Texture *texture;
 211
 212         int bigendian;
 213
 214         // error reporting
 215         const char *errorstring;
 216
 217         DPSOFTRAST_State_User user;
 218
 219         DPSOFTRAST_State_Draw draw;
 220 }
 221 DPSOFTRAST_State;
 222
 223 DPSOFTRAST_State dpsoftrast;
 224
 225 extern int dpsoftrast_test;
 226
 227 #define DPSOFTRAST_DEPTHSCALE (1024.0f*1048576.0f)
 228 #define DPSOFTRAST_BGRA8_FROM_RGBA32F(r,g,b,a) (((int)(r * 255.0f + 0.5f) << 16) | ((int)(g * 255.0f + 0.5f) << 8) | (int)(b * 255.0f + 0.5f) | ((int)(a * 255.0f + 0.5f) << 24))
 229 #define DPSOFTRAST_DEPTH32_FROM_DEPTH32F(d) ((int)(DPSOFTRAST_DEPTHSCALE * (1-d)))
 230 #define DPSOFTRAST_DRAW_MAXSPANLENGTH 256
 231
 232 void DPSOFTRAST_RecalcFB(void)
 233 {
 234         // calculate framebuffer scissor, viewport, viewport clipped by scissor,
 235         // and viewport projection values
 236         int x1, x2, x3, x4, x5, x6;
 237         int y1, y2, y3, y4, y5, y6;
 238         x1 = dpsoftrast.user.scissor[0];
 239         x2 = dpsoftrast.user.scissor[0] + dpsoftrast.user.scissor[2];
 240         x3 = dpsoftrast.user.viewport[0];
 241         x4 = dpsoftrast.user.viewport[0] + dpsoftrast.user.viewport[2];
 242         y1 = dpsoftrast.fb_height - dpsoftrast.user.scissor[1] - dpsoftrast.user.scissor[3];
 243         y2 = dpsoftrast.fb_height - dpsoftrast.user.scissor[1];
 244         y3 = dpsoftrast.fb_height - dpsoftrast.user.viewport[1] - dpsoftrast.user.viewport[3];
 245         y4 = dpsoftrast.fb_height - dpsoftrast.user.viewport[1];
 246         if (!dpsoftrast.user.scissortest) {x1 = 0;y1 = 0;x2 = dpsoftrast.fb_width;y2 = dpsoftrast.fb_height;}
 247         if (x1 < 0) x1 = 0;
 248         if (x2 > dpsoftrast.fb_width) x2 = dpsoftrast.fb_width;
 249         if (x3 < 0) x1 = 0;
 250         if (x4 > dpsoftrast.fb_width) x4 = dpsoftrast.fb_width;
 251         if (y1 < 0) y1 = 0;
 252         if (y2 > dpsoftrast.fb_height) y2 = dpsoftrast.fb_height;
 253         if (y3 < 0) y1 = 0;
 254         if (y4 > dpsoftrast.fb_height) y4 = dpsoftrast.fb_height;
 255         x5 = x1;if (x5 < x3) x5 = x3;
 256         x6 = x2;if (x6 > x4) x4 = x4;
 257         y5 = y1;if (y5 < y3) y5 = y3;
 258         y6 = y2;if (y6 > y4) y6 = y4;
 259         dpsoftrast.fb_clearscissor[0] = x1;
 260         dpsoftrast.fb_clearscissor[1] = y1;
 261         dpsoftrast.fb_clearscissor[2] = x2 - x1;
 262         dpsoftrast.fb_clearscissor[3] = y2 - y1;
 263         dpsoftrast.fb_viewport[0] = x3;
 264         dpsoftrast.fb_viewport[1] = y3;
 265         dpsoftrast.fb_viewport[2] = x4 - x3;
 266         dpsoftrast.fb_viewport[3] = y4 - y3;
 267         dpsoftrast.fb_viewportscissor[0] = x5;
 268         dpsoftrast.fb_viewportscissor[1] = y5;
 269         dpsoftrast.fb_viewportscissor[2] = x6 - x5;
 270         dpsoftrast.fb_viewportscissor[3] = y6 - y5;
 271         dpsoftrast.fb_viewportcenter[0] = dpsoftrast.user.viewport[0] + 0.5f * dpsoftrast.user.viewport[2] - 0.5f;
 272         dpsoftrast.fb_viewportcenter[1] = dpsoftrast.fb_height - dpsoftrast.user.viewport[1] - 0.5f * dpsoftrast.user.viewport[3] - 0.5f;
 273         dpsoftrast.fb_viewportscale[0] = 0.5f * dpsoftrast.user.viewport[2];
 274         dpsoftrast.fb_viewportscale[1] = -0.5f * dpsoftrast.user.viewport[3];
 275 }
 276
 277 void DPSOFTRAST_RecalcDepthFunc(void)
 278 {
 279         dpsoftrast.fb_depthfunc = dpsoftrast.user.depthtest ? dpsoftrast.user.depthfunc : GL_ALWAYS;
 280 }
 281
 282 int blendmodetable[][4] =
 283 {
 284         {DPSOFTRAST_BLENDMODE_OPAQUE, GL_ONE, GL_ZERO, false},
 285         {DPSOFTRAST_BLENDMODE_ALPHA, GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, false},
 286         {DPSOFTRAST_BLENDMODE_ADDALPHA, GL_SRC_ALPHA, GL_ONE, false},
 287         {DPSOFTRAST_BLENDMODE_ADD, GL_ONE, GL_ONE, false},
 288         {DPSOFTRAST_BLENDMODE_INVMOD, GL_ZERO, GL_ONE_MINUS_SRC_COLOR, false},
 289         {DPSOFTRAST_BLENDMODE_MUL, GL_ZERO, GL_SRC_COLOR, false},
 290         {DPSOFTRAST_BLENDMODE_MUL, GL_DST_COLOR, GL_ZERO, false},
 291         {DPSOFTRAST_BLENDMODE_MUL2, GL_DST_COLOR, GL_SRC_COLOR, false},
 292         {DPSOFTRAST_BLENDMODE_PSEUDOALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA, false},
 293         {DPSOFTRAST_BLENDMODE_SUBALPHA, GL_SRC_COLOR, GL_ONE, true}
 294 };
 295
 296 void DPSOFTRAST_RecalcBlendFunc(void)
 297 {
 298         int i;
 299         dpsoftrast.fb_blendmode = DPSOFTRAST_BLENDMODE_OPAQUE;
 300         for (i = 0;i < (int)(sizeof(blendmodetable) / sizeof(blendmodetable[0]));i++)
 301         {
 302                 if (dpsoftrast.user.blendfunc[0] == blendmodetable[i][1] && dpsoftrast.user.blendfunc[1] == blendmodetable[i][2] && dpsoftrast.user.blendsubtract == blendmodetable[i][3])
 303                 {
 304                         dpsoftrast.fb_blendmode = blendmodetable[i][0];
 305                         break;
 306                 }
 307         }
 308 }
 309
 310 #define DPSOFTRAST_ValidateQuick(f) ((dpsoftrast.validate & (f)) ? (DPSOFTRAST_Validate(f), 0) : 0)
 311
 312 void DPSOFTRAST_Validate(int mask)
 313 {
 314         mask &= dpsoftrast.validate;
 315         if (!mask)
 316                 return;
 317         if (mask & DPSOFTRAST_VALIDATE_FB)
 318         {
 319                 dpsoftrast.validate &= ~DPSOFTRAST_VALIDATE_FB;
 320                 DPSOFTRAST_RecalcFB();
 321         }
 322         if (mask & DPSOFTRAST_VALIDATE_DEPTHFUNC)
 323         {
 324                 dpsoftrast.validate &= ~DPSOFTRAST_VALIDATE_DEPTHFUNC;
 325                 DPSOFTRAST_RecalcDepthFunc();
 326         }
 327         if (mask & DPSOFTRAST_VALIDATE_BLENDFUNC)
 328         {
 329                 dpsoftrast.validate &= ~DPSOFTRAST_VALIDATE_BLENDFUNC;
 330                 DPSOFTRAST_RecalcBlendFunc();
 331         }
 332 }
 333
 334 DPSOFTRAST_Texture *DPSOFTRAST_Texture_GetByIndex(int index)
 335 {
 336         if (index >= 1 && index < dpsoftrast.texture_end && dpsoftrast.texture[index].bytes)
 337                 return &dpsoftrast.texture[index];
 338         return NULL;
 339 }
 340
 341 int DPSOFTRAST_Texture_New(int flags, int width, int height, int depth)
 342 {
 343         int w;
 344         int h;
 345         int d;
 346         int size;
 347         int s;
 348         int texnum;
 349         int mipmaps;
 350         int sides = (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP) ? 6 : 1;
 351         int texformat = flags & DPSOFTRAST_TEXTURE_FORMAT_COMPAREMASK;
 352         DPSOFTRAST_Texture *texture;
 353         if (width*height*depth < 1)
 354         {
 355                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: width, height or depth is less than 1";
 356                 return 0;
 357         }
 358         if (width > DPSOFTRAST_TEXTURE_MAXSIZE || height > DPSOFTRAST_TEXTURE_MAXSIZE || depth > DPSOFTRAST_TEXTURE_MAXSIZE)
 359         {
 360                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: texture size is too large";
 361                 return 0;
 362         }
 363         switch(texformat)
 364         {
 365         case DPSOFTRAST_TEXTURE_FORMAT_BGRA8:
 366         case DPSOFTRAST_TEXTURE_FORMAT_RGBA8:
 367         case DPSOFTRAST_TEXTURE_FORMAT_ALPHA8:
 368                 break;
 369         case DPSOFTRAST_TEXTURE_FORMAT_DEPTH:
 370                 if (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP)
 371                 {
 372                         dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH only permitted on 2D textures";
 373                         return 0;
 374                 }
 375                 if (depth != 1)
 376                 {
 377                         dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH only permitted on 2D textures";
 378                         return 0;
 379                 }
 380                 if ((flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP) && (texformat == DPSOFTRAST_TEXTURE_FORMAT_DEPTH))
 381                 {
 382                         dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH does not permit mipmaps";
 383                         return 0;
 384                 }
 385                 break;
 386         }
 387         if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP))
 388         {
 389                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_CUBEMAP can not be used on 3D textures";
 390                 return 0;
 391         }
 392         if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
 393         {
 394                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on 3D textures";
 395                 return 0;
 396         }
 397         if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
 398         {
 399                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on 3D textures";
 400                 return 0;
 401         }
 402         if ((flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP) && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
 403         {
 404                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on cubemap textures";
 405                 return 0;
 406         }
 407         if ((width & (width-1)) || (height & (height-1)) || (depth & (depth-1)))
 408         {
 409                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: dimensions are not power of two";
 410                 return 0;
 411         }
 412         // find first empty slot in texture array
 413         for (texnum = dpsoftrast.texture_firstfree;texnum < dpsoftrast.texture_end;texnum++)
 414                 if (!dpsoftrast.texture[texnum].bytes)
 415                         break;
 416         dpsoftrast.texture_firstfree = texnum + 1;
 417         if (dpsoftrast.texture_max <= texnum)
 418         {
 419                 // expand texture array as needed
 420                 if (dpsoftrast.texture_max < 1024)
 421                         dpsoftrast.texture_max = 1024;
 422                 else
 423                         dpsoftrast.texture_max *= 2;
 424                 dpsoftrast.texture = (DPSOFTRAST_Texture *)realloc(dpsoftrast.texture, dpsoftrast.texture_max * sizeof(DPSOFTRAST_Texture));
 425         }
 426         if (dpsoftrast.texture_end <= texnum)
 427                 dpsoftrast.texture_end = texnum + 1;
 428         texture = &dpsoftrast.texture[texnum];
 429         memset(texture, 0, sizeof(*texture));
 430         texture->flags = flags;
 431         texture->width = width;
 432         texture->height = height;
 433         texture->depth = depth;
 434         texture->sides = sides;
 435         w = width;
 436         h = height;
 437         d = depth;
 438         size = 0;
 439         mipmaps = 0;
 440         w = width;
 441         h = height;
 442         d = depth;
 443         for (;;)
 444         {
 445                 s = w * h * d * sides * 4;
 446                 texture->mipmap[mipmaps][0] = size;
 447                 texture->mipmap[mipmaps][1] = s;
 448                 texture->mipmap[mipmaps][2] = w;
 449                 texture->mipmap[mipmaps][3] = h;
 450                 texture->mipmap[mipmaps][4] = d;
 451                 size += s;
 452                 mipmaps++;
 453                 if (w * h * d == 1 || !(flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
 454                         break;
 455                 if (w > 1) w >>= 1;
 456                 if (h > 1) h >>= 1;
 457                 if (d > 1) d >>= 1;
 458         }
 459         texture->mipmaps = mipmaps;
 460         texture->size = size;
 461
 462         // allocate the pixels now
 463         texture->bytes = (unsigned char *)calloc(1, size);
 464
 465         return texnum;
 466 }
 467 void DPSOFTRAST_Texture_Free(int index)
 468 {
 469         DPSOFTRAST_Texture *texture;
 470         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
 471         if (texture->bytes)
 472                 free(texture->bytes);
 473         texture->bytes = NULL;
 474         memset(texture, 0, sizeof(*texture));
 475         // adjust the free range and used range
 476         if (dpsoftrast.texture_firstfree > index)
 477                 dpsoftrast.texture_firstfree = index;
 478         while (dpsoftrast.texture_end > 0 && dpsoftrast.texture[dpsoftrast.texture_end-1].bytes == NULL)
 479                 dpsoftrast.texture_end--;
 480 }
 481 void DPSOFTRAST_Texture_CalculateMipmaps(int index)
 482 {
 483         int i, x, y, z, w, layer0, layer1, row0, row1;
 484         unsigned char *o, *i0, *i1, *i2, *i3;
 485         DPSOFTRAST_Texture *texture;
 486         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
 487         if (texture->mipmaps <= 1)
 488                 return;
 489         for (i = 1;i < texture->mipmaps;i++)
 490         {
 491                 for (z = 0;z < texture->mipmap[i][4];z++)
 492                 {
 493                         layer0 = z*2;
 494                         layer1 = z*2+1;
 495                         if (layer1 >= texture->mipmap[i-1][4])
 496                                 layer1 = texture->mipmap[i-1][4]-1;
 497                         for (y = 0;y < texture->mipmap[i][3];y++)
 498                         {
 499                                 row0 = y*2;
 500                                 row1 = y*2+1;
 501                                 if (row1 >= texture->mipmap[i-1][3])
 502                                         row1 = texture->mipmap[i-1][3]-1;
 503                                 o =  texture->bytes + texture->mipmap[i  ][0] + 4*((texture->mipmap[i  ][3] * z      + y   ) * texture->mipmap[i  ][2]);
 504                                 i0 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer0 + row0) * texture->mipmap[i-1][2]);
 505                                 i1 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer0 + row1) * texture->mipmap[i-1][2]);
 506                                 i2 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer1 + row0) * texture->mipmap[i-1][2]);
 507                                 i3 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer1 + row1) * texture->mipmap[i-1][2]);
 508                                 w = texture->mipmap[i][2];
 509                                 if (layer1 > layer0)
 510                                 {
 511                                         if (texture->mipmap[i-1][2] > 1)
 512                                         {
 513                                                 // average 3D texture
 514                                                 for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8, i2 += 8, i3 += 8)
 515                                                 {
 516                                                         o[0] = (i0[0] + i0[4] + i1[0] + i1[4] + i2[0] + i2[4] + i3[0] + i3[4] + 4) >> 3;
 517                                                         o[1] = (i0[1] + i0[5] + i1[1] + i1[5] + i2[1] + i2[5] + i3[1] + i3[5] + 4) >> 3;
 518                                                         o[2] = (i0[2] + i0[6] + i1[2] + i1[6] + i2[2] + i2[6] + i3[2] + i3[6] + 4) >> 3;
 519                                                         o[3] = (i0[3] + i0[7] + i1[3] + i1[7] + i2[3] + i2[7] + i3[3] + i3[7] + 4) >> 3;
 520                                                 }
 521                                         }
 522                                         else
 523                                         {
 524                                                 // average 3D mipmap with parent width == 1
 525                                                 for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8)
 526                                                 {
 527                                                         o[0] = (i0[0] + i1[0] + i2[0] + i3[0] + 2) >> 2;
 528                                                         o[1] = (i0[1] + i1[1] + i2[1] + i3[1] + 2) >> 2;
 529                                                         o[2] = (i0[2] + i1[2] + i2[2] + i3[2] + 2) >> 2;
 530                                                         o[3] = (i0[3] + i1[3] + i2[3] + i3[3] + 2) >> 2;
 531                                                 }
 532                                         }
 533                                 }
 534                                 else
 535                                 {
 536                                         if (texture->mipmap[i-1][2] > 1)
 537                                         {
 538                                                 // average 2D texture (common case)
 539                                                 for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8)
 540                                                 {
 541                                                         o[0] = (i0[0] + i0[4] + i1[0] + i1[4] + 2) >> 2;
 542                                                         o[1] = (i0[1] + i0[5] + i1[1] + i1[5] + 2) >> 2;
 543                                                         o[2] = (i0[2] + i0[6] + i1[2] + i1[6] + 2) >> 2;
 544                                                         o[3] = (i0[3] + i0[7] + i1[3] + i1[7] + 2) >> 2;
 545                                                 }
 546                                         }
 547                                         else
 548                                         {
 549                                                 // 2D texture with parent width == 1
 550                                                 o[0] = (i0[0] + i1[0] + 1) >> 1;
 551                                                 o[1] = (i0[1] + i1[1] + 1) >> 1;
 552                                                 o[2] = (i0[2] + i1[2] + 1) >> 1;
 553                                                 o[3] = (i0[3] + i1[3] + 1) >> 1;
 554                                         }
 555                                 }
 556                         }
 557                 }
 558         }
 559 }
 560 void DPSOFTRAST_Texture_UpdatePartial(int index, int mip, const unsigned char *pixels, int blockx, int blocky, int blockwidth, int blockheight)
 561 {
 562         DPSOFTRAST_Texture *texture;
 563         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
 564
 565         // FIXME IMPLEMENT
 566
 567         dpsoftrast.errorstring = "DPSOFTRAST_Texture_UpdatePartial: Not implemented.";
 568 }
 569 void DPSOFTRAST_Texture_UpdateFull(int index, const unsigned char *pixels)
 570 {
 571         DPSOFTRAST_Texture *texture;
 572         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
 573
 574         memcpy(texture->bytes, pixels, texture->mipmap[0][1]);
 575         DPSOFTRAST_Texture_CalculateMipmaps(index);
 576 }
 577 int DPSOFTRAST_Texture_GetWidth(int index, int mip)
 578 {
 579         DPSOFTRAST_Texture *texture;
 580         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
 581         return texture->mipmap[mip][2];
 582 }
 583 int DPSOFTRAST_Texture_GetHeight(int index, int mip)
 584 {
 585         DPSOFTRAST_Texture *texture;
 586         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
 587         return texture->mipmap[mip][3];
 588 }
 589 int DPSOFTRAST_Texture_GetDepth(int index, int mip)
 590 {
 591         DPSOFTRAST_Texture *texture;
 592         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
 593         return texture->mipmap[mip][4];
 594 }
 595 unsigned char *DPSOFTRAST_Texture_GetPixelPointer(int index, int mip)
 596 {
 597         DPSOFTRAST_Texture *texture;
 598         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
 599         return texture->bytes + texture->mipmap[mip][0];
 600 }
 601 void DPSOFTRAST_Texture_Filter(int index, DPSOFTRAST_TEXTURE_FILTER filter)
 602 {
 603         DPSOFTRAST_Texture *texture;
 604         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
 605         if (!(texture->flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP) && filter > DPSOFTRAST_TEXTURE_FILTER_LINEAR)
 606         {
 607                 dpsoftrast.errorstring = "DPSOFTRAST_Texture_Filter: requested filter mode requires mipmaps";
 608                 return;
 609         }
 610         texture->filter = filter;
 611 }
 612
 613 void DPSOFTRAST_SetRenderTargets(int width, int height, unsigned int *depthpixels, unsigned int *colorpixels0, unsigned int *colorpixels1, unsigned int *colorpixels2, unsigned int *colorpixels3)
 614 {
 615         dpsoftrast.fb_width = width;
 616         dpsoftrast.fb_height = height;
 617         dpsoftrast.fb_depthpixels = depthpixels;
 618         dpsoftrast.fb_colorpixels[0] = colorpixels0;
 619         dpsoftrast.fb_colorpixels[1] = colorpixels1;
 620         dpsoftrast.fb_colorpixels[2] = colorpixels2;
 621         dpsoftrast.fb_colorpixels[3] = colorpixels3;
 622 }
 623 void DPSOFTRAST_Viewport(int x, int y, int width, int height)
 624 {
 625         dpsoftrast.user.viewport[0] = x;
 626         dpsoftrast.user.viewport[1] = y;
 627         dpsoftrast.user.viewport[2] = width;
 628         dpsoftrast.user.viewport[3] = height;
 629         dpsoftrast.validate |= DPSOFTRAST_VALIDATE_FB;
 630 }
 631 void DPSOFTRAST_ClearColor(float r, float g, float b, float a)
 632 {
 633         int i, x1, y1, x2, y2, w, h, x, y;
 634         unsigned int *p;
 635         unsigned int c;
 636         DPSOFTRAST_Validate(DPSOFTRAST_VALIDATE_FB);
 637         x1 = dpsoftrast.fb_clearscissor[0];
 638         y1 = dpsoftrast.fb_clearscissor[1];
 639         x2 = dpsoftrast.fb_clearscissor[2];
 640         y2 = dpsoftrast.fb_clearscissor[1] + dpsoftrast.fb_clearscissor[3];
 641         w = x2 - x1;
 642         h = y2 - y1;
 643         if (w < 1 || h < 1)
 644                 return;
 645         // FIXME: honor dpsoftrast.fb_colormask?
 646         c = DPSOFTRAST_BGRA8_FROM_RGBA32F(r,g,b,a);
 647         for (i = 0;i < 4;i++)
 648         {
 649                 if (!dpsoftrast.fb_colorpixels[i])
 650                         continue;
 651                 for (y = y1;y < y2;y++)
 652                 {
 653                         p = dpsoftrast.fb_colorpixels[i] + y * dpsoftrast.fb_width;
 654                         for (x = x1;x < x2;x++)
 655                                 p[x] = c;
 656                 }
 657         }
 658 }
 659 void DPSOFTRAST_ClearDepth(float d)
 660 {
 661         int x1, y1, x2, y2, w, h, x, y;
 662         unsigned int *p;
 663         unsigned int c;
 664         DPSOFTRAST_Validate(DPSOFTRAST_VALIDATE_FB);
 665         x1 = dpsoftrast.fb_clearscissor[0];
 666         y1 = dpsoftrast.fb_clearscissor[1];
 667         x2 = dpsoftrast.fb_clearscissor[2];
 668         y2 = dpsoftrast.fb_clearscissor[1] + dpsoftrast.fb_clearscissor[3];
 669         w = x2 - x1;
 670         h = y2 - y1;
 671         if (w < 1 || h < 1)
 672                 return;
 673         c = DPSOFTRAST_DEPTH32_FROM_DEPTH32F(d);
 674         for (y = y1;y < y2;y++)
 675         {
 676                 p = dpsoftrast.fb_depthpixels + y * dpsoftrast.fb_width;
 677                 for (x = x1;x < x2;x++)
 678                         p[x] = c;
 679         }
 680 }
 681 void DPSOFTRAST_ColorMask(int r, int g, int b, int a)
 682 {
 683         dpsoftrast.user.colormask[0] = r != 0;
 684         dpsoftrast.user.colormask[1] = g != 0;
 685         dpsoftrast.user.colormask[2] = b != 0;
 686         dpsoftrast.user.colormask[3] = a != 0;
 687         dpsoftrast.fb_colormask = ((-dpsoftrast.user.colormask[0]) & 0x00FF0000) | ((-dpsoftrast.user.colormask[1]) & 0x0000FF00) | ((-dpsoftrast.user.colormask[2]) & 0x000000FF) | ((-dpsoftrast.user.colormask[3]) & 0xFF000000);
 688 }
 689 void DPSOFTRAST_DepthTest(int enable)
 690 {
 691         dpsoftrast.user.depthtest = enable;
 692         dpsoftrast.validate |= DPSOFTRAST_VALIDATE_DEPTHFUNC;
 693 }
 694 void DPSOFTRAST_ScissorTest(int enable)
 695 {
 696         dpsoftrast.user.scissortest = enable;
 697         dpsoftrast.validate |= DPSOFTRAST_VALIDATE_FB;
 698 }
 699 void DPSOFTRAST_Scissor(float x, float y, float width, float height)
 700 {
 701         dpsoftrast.user.scissor[0] = x;
 702         dpsoftrast.user.scissor[1] = y;
 703         dpsoftrast.user.scissor[2] = width;
 704         dpsoftrast.user.scissor[3] = height;
 705         dpsoftrast.validate |= DPSOFTRAST_VALIDATE_FB;
 706 }
 707
 708 void DPSOFTRAST_BlendFunc(int smodulate, int dmodulate)
 709 {
 710         // FIXME: validate
 711         dpsoftrast.user.blendfunc[0] = smodulate;
 712         dpsoftrast.user.blendfunc[1] = dmodulate;
 713         dpsoftrast.validate |= DPSOFTRAST_VALIDATE_BLENDFUNC;
 714 }
 715 void DPSOFTRAST_BlendSubtract(int enable)
 716 {
 717         dpsoftrast.user.blendsubtract = enable != 0;
 718         dpsoftrast.validate |= DPSOFTRAST_VALIDATE_BLENDFUNC;
 719 }
 720 void DPSOFTRAST_DepthMask(int enable)
 721 {
 722         dpsoftrast.user.depthmask = enable;
 723 }
 724 void DPSOFTRAST_DepthFunc(int comparemode)
 725 {
 726         // FIXME: validate
 727         dpsoftrast.user.depthfunc = comparemode;
 728 }
 729 void DPSOFTRAST_DepthRange(float range0, float range1)
 730 {
 731         dpsoftrast.user.depthrange[0] = range0;
 732         dpsoftrast.user.depthrange[1] = range1;
 733 }
 734 void DPSOFTRAST_PolygonOffset(float alongnormal, float intoview)
 735 {
 736         dpsoftrast.user.polygonoffset[0] = alongnormal;
 737         dpsoftrast.user.polygonoffset[1] = intoview;
 738 }
 739 void DPSOFTRAST_CullFace(int mode)
 740 {
 741         // FIXME: validate
 742         dpsoftrast.user.cullface = mode;
 743 }
 744 void DPSOFTRAST_AlphaTest(float enable)
 745 {
 746         dpsoftrast.user.alphatest = enable;
 747 }
 748 void DPSOFTRAST_AlphaFunc(int alphafunc, float alphavalue)
 749 {
 750         // FIXME: validate
 751         dpsoftrast.user.alphafunc = alphafunc;
 752         dpsoftrast.user.alphavalue = alphavalue;
 753 }
 754 void DPSOFTRAST_Color4f(float r, float g, float b, float a)
 755 {
 756         dpsoftrast.user.color[0] = r;
 757         dpsoftrast.user.color[1] = g;
 758         dpsoftrast.user.color[2] = b;
 759         dpsoftrast.user.color[3] = a;
 760 }
 761 void DPSOFTRAST_GetPixelsBGRA(int blockx, int blocky, int blockwidth, int blockheight, unsigned char *outpixels)
 762 {
 763         int outstride = blockwidth * 4;
 764         int instride = dpsoftrast.fb_width * 4;
 765         int bx1 = blockx;
 766         int by1 = blocky;
 767         int bx2 = blockx + blockwidth;
 768         int by2 = blocky + blockheight;
 769         int bw;
 770         int bh;
 771         int x;
 772         int y;
 773         unsigned char *inpixels;
 774         unsigned char *b;
 775         unsigned char *o;
 776         if (bx1 < 0) bx1 = 0;
 777         if (by1 < 0) by1 = 0;
 778         if (bx2 > dpsoftrast.fb_width) bx2 = dpsoftrast.fb_width;
 779         if (by2 > dpsoftrast.fb_height) by2 = dpsoftrast.fb_height;
 780         bw = bx2 - bx1;
 781         bh = by2 - by1;
 782         inpixels = (unsigned char *)dpsoftrast.fb_colorpixels[0];
 783         if (dpsoftrast.bigendian)
 784         {
 785                 for (y = by1;y < by2;y++)
 786                 {
 787                         b = (unsigned char *)inpixels + (dpsoftrast.fb_height - 1 - y) * instride + 4 * bx1;
 788                         o = (unsigned char *)outpixels + (y - by1) * outstride;
 789                         for (x = bx1;x < bx2;x++)
 790                         {
 791                                 o[0] = b[3];
 792                                 o[1] = b[2];
 793                                 o[2] = b[1];
 794                                 o[3] = b[0];
 795                                 o += 4;
 796                                 b += 4;
 797                         }
 798                 }
 799         }
 800         else
 801         {
 802                 for (y = by1;y < by2;y++)
 803                 {
 804                         b = (unsigned char *)inpixels + (dpsoftrast.fb_height - 1 - y) * instride + 4 * bx1;
 805                         o = (unsigned char *)outpixels + (y - by1) * outstride;
 806                         memcpy(o, b, bw*4);
 807                 }
 808         }
 809
 810 }
 811 void DPSOFTRAST_CopyRectangleToTexture(int index, int mip, int tx, int ty, int sx, int sy, int width, int height)
 812 {
 813         int tx1 = tx;
 814         int ty1 = ty;
 815         int tx2 = tx + width;
 816         int ty2 = ty + height;
 817         int sx1 = sx;
 818         int sy1 = sy;
 819         int sx2 = sx + width;
 820         int sy2 = sy + height;
 821         int swidth;
 822         int sheight;
 823         int twidth;
 824         int theight;
 825         int sw;
 826         int sh;
 827         int tw;
 828         int th;
 829         int y;
 830         unsigned int *spixels;
 831         unsigned int *tpixels;
 832         DPSOFTRAST_Texture *texture;
 833         texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
 834         if (mip < 0 || mip >= texture->mipmaps) return;
 835         spixels = dpsoftrast.fb_colorpixels[0];
 836         swidth = dpsoftrast.fb_width;
 837         sheight = dpsoftrast.fb_height;
 838         tpixels = (unsigned int *)(texture->bytes + texture->mipmap[mip][0]);
 839         twidth = texture->mipmap[mip][2];
 840         theight = texture->mipmap[mip][3];
 841         if (tx1 < 0) tx1 = 0;
 842         if (ty1 < 0) ty1 = 0;
 843         if (tx2 > twidth) tx2 = twidth;
 844         if (ty2 > theight) ty2 = theight;
 845         if (sx1 < 0) sx1 = 0;
 846         if (sy1 < 0) sy1 = 0;
 847         if (sx2 > swidth) sx2 = swidth;
 848         if (sy2 > sheight) sy2 = sheight;
 849         tw = tx2 - tx1;
 850         th = ty2 - ty1;
 851         sw = sx2 - sx1;
 852         sh = sy2 - sy1;
 853         if (tw > sw) tw = sw;
 854         if (th > sh) th = sh;
 855         if (tw < 1 || th < 1)
 856                 return;
 857         for (y = 0;y < th;y++)
 858                 memcpy(tpixels + ((ty1 + y) * twidth + tx1), spixels + ((sy1 + y) * swidth + sx1), tw*4);
 859         if (texture->mipmaps > 1)
 860                 DPSOFTRAST_Texture_CalculateMipmaps(index);
 861 }
 862 void DPSOFTRAST_SetTexture(int unitnum, int index)
 863 {
 864         DPSOFTRAST_Texture *texture;
 865         if (unitnum < 0 || unitnum >= DPSOFTRAST_MAXTEXTUREUNITS)
 866         {
 867                 dpsoftrast.errorstring = "DPSOFTRAST_SetTexture: invalid unit number";
 868                 return;
 869         }
 870         texture = DPSOFTRAST_Texture_GetByIndex(index);
 871         if (index && !texture)
 872         {
 873                 dpsoftrast.errorstring = "DPSOFTRAST_SetTexture: invalid texture handle";
 874                 return;
 875         }
 876         dpsoftrast.texbound[unitnum] = texture;
 877 }
 878
 879 void DPSOFTRAST_SetVertexPointer(const float *vertex3f, size_t stride)
 880 {
 881         dpsoftrast.pointer_vertex3f = vertex3f;
 882         dpsoftrast.stride_vertex = stride;
 883 }
 884 void DPSOFTRAST_SetColorPointer(const float *color4f, size_t stride)
 885 {
 886         dpsoftrast.pointer_color4f = color4f;
 887         dpsoftrast.pointer_color4ub = NULL;
 888         dpsoftrast.stride_color = stride;
 889 }
 890 void DPSOFTRAST_SetColorPointer4ub(const unsigned char *color4ub, size_t stride)
 891 {
 892         dpsoftrast.pointer_color4f = NULL;
 893         dpsoftrast.pointer_color4ub = color4ub;
 894         dpsoftrast.stride_color = stride;
 895 }
 896 void DPSOFTRAST_SetTexCoordPointer(int unitnum, int numcomponents, size_t stride, const float *texcoordf)
 897 {
 898         dpsoftrast.pointer_texcoordf[unitnum] = texcoordf;
 899         dpsoftrast.components_texcoord[unitnum] = numcomponents;
 900         dpsoftrast.stride_texcoord[unitnum] = stride;
 901 }
 902
 903 void DPSOFTRAST_SetShader(unsigned int mode, unsigned int permutation)
 904 {
 905         dpsoftrast.shader_mode = mode;
 906         dpsoftrast.shader_permutation = permutation;
 907 }
 908 void DPSOFTRAST_Uniform4fARB(DPSOFTRAST_UNIFORM index, float v0, float v1, float v2, float v3)
 909 {
 910         dpsoftrast.uniform4f[index*4+0] = v0;
 911         dpsoftrast.uniform4f[index*4+1] = v1;
 912         dpsoftrast.uniform4f[index*4+2] = v2;
 913         dpsoftrast.uniform4f[index*4+3] = v3;
 914 }
 915 void DPSOFTRAST_Uniform4fvARB(DPSOFTRAST_UNIFORM index, const float *v)
 916 {
 917         dpsoftrast.uniform4f[index*4+0] = v[0];
 918         dpsoftrast.uniform4f[index*4+1] = v[1];
 919         dpsoftrast.uniform4f[index*4+2] = v[2];
 920         dpsoftrast.uniform4f[index*4+3] = v[3];
 921 }
 922 void DPSOFTRAST_UniformMatrix4fvARB(DPSOFTRAST_UNIFORM index, int arraysize, int transpose, const float *v)
 923 {
 924         int i;
 925         for (i = 0;i < arraysize;i++, index += 4, v += 16)
 926         {
 927                 if (transpose)
 928                 {
 929                         dpsoftrast.uniform4f[index*4+0] = v[0];
 930                         dpsoftrast.uniform4f[index*4+1] = v[4];
 931                         dpsoftrast.uniform4f[index*4+2] = v[8];
 932                         dpsoftrast.uniform4f[index*4+3] = v[12];
 933                         dpsoftrast.uniform4f[index*4+4] = v[1];
 934                         dpsoftrast.uniform4f[index*4+5] = v[5];
 935                         dpsoftrast.uniform4f[index*4+6] = v[9];
 936                         dpsoftrast.uniform4f[index*4+7] = v[13];
 937                         dpsoftrast.uniform4f[index*4+8] = v[2];
 938                         dpsoftrast.uniform4f[index*4+9] = v[6];
 939                         dpsoftrast.uniform4f[index*4+10] = v[10];
 940                         dpsoftrast.uniform4f[index*4+11] = v[14];
 941                         dpsoftrast.uniform4f[index*4+12] = v[3];
 942                         dpsoftrast.uniform4f[index*4+13] = v[7];
 943                         dpsoftrast.uniform4f[index*4+14] = v[11];
 944                         dpsoftrast.uniform4f[index*4+15] = v[15];
 945                 }
 946                 else
 947                 {
 948                         dpsoftrast.uniform4f[index*4+0] = v[0];
 949                         dpsoftrast.uniform4f[index*4+1] = v[1];
 950                         dpsoftrast.uniform4f[index*4+2] = v[2];
 951                         dpsoftrast.uniform4f[index*4+3] = v[3];
 952                         dpsoftrast.uniform4f[index*4+4] = v[4];
 953                         dpsoftrast.uniform4f[index*4+5] = v[5];
 954                         dpsoftrast.uniform4f[index*4+6] = v[6];
 955                         dpsoftrast.uniform4f[index*4+7] = v[7];
 956                         dpsoftrast.uniform4f[index*4+8] = v[8];
 957                         dpsoftrast.uniform4f[index*4+9] = v[9];
 958                         dpsoftrast.uniform4f[index*4+10] = v[10];
 959                         dpsoftrast.uniform4f[index*4+11] = v[11];
 960                         dpsoftrast.uniform4f[index*4+12] = v[12];
 961                         dpsoftrast.uniform4f[index*4+13] = v[13];
 962                         dpsoftrast.uniform4f[index*4+14] = v[14];
 963                         dpsoftrast.uniform4f[index*4+15] = v[15];
 964                 }
 965         }
 966 }
 967 void DPSOFTRAST_Uniform1iARB(DPSOFTRAST_UNIFORM index, int i0)
 968 {
 969         dpsoftrast.uniform1i[index] = i0;
 970 }
 971
 972 void DPSOFTRAST_Draw_LoadVertices(int firstvertex, int numvertices, bool needcolors)
 973 {
 974         int i;
 975         int j;
 976         int stride;
 977         const float *v;
 978         float *p;
 979         float *data;
 980         const unsigned char *b;
 981         dpsoftrast.draw.numvertices = numvertices;
 982         if (dpsoftrast.draw.maxvertices < dpsoftrast.draw.numvertices)
 983         {
 984                 if (dpsoftrast.draw.maxvertices < 4096)
 985                         dpsoftrast.draw.maxvertices = 4096;
 986                 while (dpsoftrast.draw.maxvertices < dpsoftrast.draw.numvertices)
 987                         dpsoftrast.draw.maxvertices *= 2;
 988                 if (dpsoftrast.draw.in_array4f[0])
 989                         free(dpsoftrast.draw.in_array4f[0]);
 990                 data = (float *)calloc(1, dpsoftrast.draw.maxvertices * sizeof(float[4])*(DPSOFTRAST_ARRAY_TOTAL*2 + 1));
 991                 for (i = 0;i < DPSOFTRAST_ARRAY_TOTAL;i++, data += dpsoftrast.draw.maxvertices * 4)
 992                         dpsoftrast.draw.in_array4f[i] = data;
 993                 for (i = 0;i < DPSOFTRAST_ARRAY_TOTAL;i++, data += dpsoftrast.draw.maxvertices * 4)
 994                         dpsoftrast.draw.post_array4f[i] = data;
 995                 dpsoftrast.draw.screencoord4f = data;
 996                 data += dpsoftrast.draw.maxvertices * 4;
 997         }
 998         stride = dpsoftrast.stride_vertex;
 999         v = (const float *)((unsigned char *)dpsoftrast.pointer_vertex3f + firstvertex * stride);
1000         p = dpsoftrast.draw.in_array4f[0];
1001         for (i = 0;i < numvertices;i++)
1002         {
1003                 p[0] = v[0];
1004                 p[1] = v[1];
1005                 p[2] = v[2];
1006                 p[3] = 1.0f;
1007                 p += 4;
1008                 v = (const float *)((const unsigned char *)v + stride);
1009         }
1010         if (needcolors)
1011         {
1012                 if (dpsoftrast.pointer_color4f)
1013                 {
1014                         stride = dpsoftrast.stride_color;
1015                         v = (const float *)((const unsigned char *)dpsoftrast.pointer_color4f + firstvertex * stride);
1016                         p = dpsoftrast.draw.in_array4f[1];
1017                         for (i = 0;i < numvertices;i++)
1018                         {
1019                                 p[0] = v[0];
1020                                 p[1] = v[1];
1021                                 p[2] = v[2];
1022                                 p[3] = v[3];
1023                                 p += 4;
1024                                 v = (const float *)((const unsigned char *)v + stride);
1025                         }
1026                 }
1027                 else if (dpsoftrast.pointer_color4ub)
1028                 {
1029                         stride = dpsoftrast.stride_color;
1030                         b = (const unsigned char *)((const unsigned char *)dpsoftrast.pointer_color4ub + firstvertex * stride);
1031                         p = dpsoftrast.draw.in_array4f[1];
1032                         for (i = 0;i < numvertices;i++)
1033                         {
1034                                 p[0] = b[0] * (1.0f / 255.0f);
1035                                 p[1] = b[1] * (1.0f / 255.0f);
1036                                 p[2] = b[2] * (1.0f / 255.0f);
1037                                 p[3] = b[3] * (1.0f / 255.0f);
1038                                 p += 4;
1039                                 b = (const unsigned char *)((const unsigned char *)b + stride);
1040                         }
1041                 }
1042                 else
1043                 {
1044                         v = dpsoftrast.user.color;
1045                         p = dpsoftrast.draw.in_array4f[1];
1046                         for (i = 0;i < numvertices;i++)
1047                         {
1048                                 p[0] = v[0];
1049                                 p[1] = v[1];
1050                                 p[2] = v[2];
1051                                 p[3] = v[3];
1052                                 p += 4;
1053                         }
1054                 }
1055         }
1056         for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL-2;j++)
1057         {
1058                 if (dpsoftrast.pointer_texcoordf[j])
1059                 {
1060                         stride = dpsoftrast.stride_texcoord[j];
1061                         v = (const float *)((const unsigned char *)dpsoftrast.pointer_texcoordf[j] + firstvertex * stride);
1062                         p = dpsoftrast.draw.in_array4f[j+2];
1063                         switch(dpsoftrast.components_texcoord[j])
1064                         {
1065                         case 2:
1066                                 for (i = 0;i < numvertices;i++)
1067                                 {
1068                                         p[0] = v[0];
1069                                         p[1] = v[1];
1070                                         p[2] = 0.0f;
1071                                         p[3] = 1.0f;
1072                                         p += 4;
1073                                         v = (const float *)((const unsigned char *)v + stride);
1074                                 }
1075                                 break;
1076                         case 3:
1077                                 for (i = 0;i < numvertices;i++)
1078                                 {
1079                                         p[0] = v[0];
1080                                         p[1] = v[1];
1081                                         p[2] = v[2];
1082                                         p[3] = 1.0f;
1083                                         p += 4;
1084                                         v = (const float *)((const unsigned char *)v + stride);
1085                                 }
1086                                 break;
1087                         case 4:
1088                                 for (i = 0;i < numvertices;i++)
1089                                 {
1090                                         p[0] = v[0];
1091                                         p[1] = v[1];
1092                                         p[2] = v[2];
1093                                         p[3] = v[3];
1094                                         p += 4;
1095                                         v = (const float *)((const unsigned char *)v + stride);
1096                                 }
1097                                 break;
1098                         }
1099                 }
1100         }
1101 }
1102
1103 void DPSOFTRAST_Array_Transform(float *out4f, const float *in4f, int numitems, const float *inmatrix16f)
1104 {
1105         static const float identitymatrix[4][4] = {{1,0,0,0},{0,1,0,0},{0,0,1,0},{0,0,0,1}};
1106         // TODO: SIMD
1107         float matrix[4][4];
1108         int i;
1109         memcpy(matrix, inmatrix16f, sizeof(float[16]));
1110         if (!memcmp(identitymatrix, matrix, sizeof(float[16])))
1111         {
1112                 // fast case for identity matrix
1113                 memcpy(out4f, in4f, numitems * sizeof(float[4]));
1114                 return;
1115         }
1116         for (i = 0;i < numitems;i++, out4f += 4, in4f += 4)
1117         {
1118                 out4f[0] = in4f[0] * matrix[0][0] + in4f[1] * matrix[1][0] + in4f[2] * matrix[2][0] + in4f[3] * matrix[3][0];
1119                 out4f[1] = in4f[0] * matrix[0][1] + in4f[1] * matrix[1][1] + in4f[2] * matrix[2][1] + in4f[3] * matrix[3][1];
1120                 out4f[2] = in4f[0] * matrix[0][2] + in4f[1] * matrix[1][2] + in4f[2] * matrix[2][2] + in4f[3] * matrix[3][2];
1121                 out4f[3] = in4f[0] * matrix[0][3] + in4f[1] * matrix[1][3] + in4f[2] * matrix[2][3] + in4f[3] * matrix[3][3];
1122         }
1123 }
1124
1125 void DPSOFTRAST_Array_Copy(float *out4f, const float *in4f, int numitems)
1126 {
1127         memcpy(out4f, in4f, numitems * sizeof(float[4]));
1128 }
1129
1130 void DPSOFTRAST_Draw_ProjectVertices(float *out4f, const float *in4f, int numitems)
1131 {
1132         // NOTE: this is used both as a whole mesh transform function and a
1133         // per-triangle transform function (for clipped triangles), accordingly
1134         // it should not crash on divide by 0 but the result of divide by 0 is
1135         // unimportant...
1136         // TODO: SIMD
1137         int i;
1138         float w;
1139         float viewportcenter[4];
1140         float viewportscale[4];
1141         viewportscale[0] = dpsoftrast.fb_viewportscale[0];
1142         viewportscale[1] = dpsoftrast.fb_viewportscale[1];
1143         viewportscale[2] = 0.5f;
1144         viewportscale[3] = 0.0f;
1145         viewportcenter[0] = dpsoftrast.fb_viewportcenter[0];
1146         viewportcenter[1] = dpsoftrast.fb_viewportcenter[1];
1147         viewportcenter[2] = 0.5f;
1148         viewportcenter[3] = 0.0f;
1149         for (i = 0;i < numitems;i++)
1150         {
1151                 if (!in4f[3])
1152                 {
1153                         out4f[0] = 0.0f;
1154                         out4f[1] = 0.0f;
1155                         out4f[2] = 0.0f;
1156                         out4f[3] = 0.0f;
1157                         continue;
1158                 }
1159                 w = 1.0f / in4f[3];
1160                 out4f[0] = viewportcenter[0] + viewportscale[0] * in4f[0] * w;
1161                 out4f[1] = viewportcenter[1] + viewportscale[1] * in4f[1] * w;
1162                 out4f[2] = viewportcenter[2] + viewportscale[2] * in4f[2] * w;
1163                 out4f[3] = viewportcenter[3] + viewportscale[3] * in4f[3] * w;
1164                 out4f[3] = w;
1165                 in4f += 4;
1166                 out4f += 4;
1167         }
1168 }
1169
1170 void DPSOFTRAST_Draw_DebugEdgePoints(const float *screen0, const float *screen1)
1171 {
1172         int i;
1173         int x;
1174         int y;
1175         int w = dpsoftrast.fb_width;
1176         int bounds[4];
1177         float v0[2], v1[2];
1178         unsigned int *pixels = dpsoftrast.fb_colorpixels[0];
1179         //const float *c4f;
1180         bounds[0] = dpsoftrast.fb_viewportscissor[0];
1181         bounds[1] = dpsoftrast.fb_viewportscissor[1];
1182         bounds[2] = dpsoftrast.fb_viewportscissor[0] + dpsoftrast.fb_viewportscissor[2];
1183         bounds[3] = dpsoftrast.fb_viewportscissor[1] + dpsoftrast.fb_viewportscissor[3];
1184         v0[0] = screen0[0];
1185         v0[1] = screen0[1];
1186         v1[0] = screen1[0];
1187         v1[1] = screen1[1];
1188         for (i = 0;i <= 128;i++)
1189         {
1190                 // check nearclip
1191                 //if (dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+3] != 1.0f)
1192                 //      continue;
1193                 x = (int)(v0[0] + (v1[0] - v0[0]) * (i/128.0f));
1194                 y = (int)(v0[1] + (v1[1] - v0[1]) * (i/128.0f));
1195                 if (x < bounds[0] || y < bounds[1] || x >= bounds[2] || y >= bounds[3])
1196                         continue;
1197                 //c4f = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR] + element0*4;
1198                 //pixels[y*w+x] = DPSOFTRAST_BGRA8_FROM_RGBA32F(c4f[0], c4f[1], c4f[2], c4f[3]);
1199                 pixels[y*w+x] = 0xFFFFFFFF;
1200         }
1201 }
1202
1203 void DPSOFTRAST_Draw_Span_Begin(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *zf)
1204 {
1205         int x;
1206         int startx = span->startx;
1207         int endx = span->endx;
1208         float w = span->data[0][DPSOFTRAST_ARRAY_TOTAL][3];
1209         float wslope = span->data[1][DPSOFTRAST_ARRAY_TOTAL][3];
1210         for (x = startx;x < endx;)
1211         {
1212                 int endsub = x + DPSOFTRAST_MAXSUBSPAN-1;
1213                 float z = 1.0f / (w + wslope * x), dz;
1214                 if (endsub >= endx)
1215                 {
1216                         endsub = endx-1;
1217                         dz = endsub > x ? (1.0f / (w + wslope * endsub) - z) / (endsub - x) : 0.0f;
1218                 }
1219                 else
1220                 {
1221                         dz = (1.0f / (w + wslope * endsub) - z) * (1.0f / (DPSOFTRAST_MAXSUBSPAN-1));
1222                 }
1223                 for (; x <= endsub; x++, z += dz)
1224                         zf[x] = z;
1225         }
1226 }
1227
1228 void DPSOFTRAST_Draw_Span_Finish(const DPSOFTRAST_State_Draw_Span * RESTRICT span, const float * RESTRICT in4f)
1229 {
1230         int x;
1231         int startx = span->startx;
1232         int endx = span->endx;
1233         int d[4];
1234         float a, b;
1235         unsigned char * RESTRICT pixelmask = span->pixelmask;
1236         unsigned char * RESTRICT pixel = (unsigned char *)dpsoftrast.fb_colorpixels[0];
1237         if (!pixel)
1238                 return;
1239         pixel += span->start * 4;
1240         // handle alphatest now (this affects depth writes too)
1241         if (dpsoftrast.user.alphatest)
1242                 for (x = startx;x < endx;x++)
1243                         if (in4f[x*4+3] < 0.5f)
1244                                 pixelmask[x] = false;
1245         // FIXME: this does not handle bigendian
1246         switch(dpsoftrast.fb_blendmode)
1247         {
1248         case DPSOFTRAST_BLENDMODE_OPAQUE:
1249                 for (x = startx;x < endx;x++)
1250                 {
1251                         if (!pixelmask[x])
1252                                 continue;
1253                         d[0] = (int)(in4f[x*4+2]*255.0f);if (d[0] > 255) d[0] = 255;
1254                         d[1] = (int)(in4f[x*4+1]*255.0f);if (d[1] > 255) d[1] = 255;
1255                         d[2] = (int)(in4f[x*4+0]*255.0f);if (d[2] > 255) d[2] = 255;
1256                         d[3] = (int)(in4f[x*4+3]*255.0f);if (d[3] > 255) d[3] = 255;
1257                         pixel[x*4+0] = d[0];
1258                         pixel[x*4+1] = d[1];
1259                         pixel[x*4+2] = d[2];
1260                         pixel[x*4+3] = d[3];
1261                 }
1262                 break;
1263         case DPSOFTRAST_BLENDMODE_ALPHA:
1264                 for (x = startx;x < endx;x++)
1265                 {
1266                         if (!pixelmask[x])
1267                                 continue;
1268                         a = in4f[x*4+3] * 255.0f;
1269                         b = 1.0f - in4f[x*4+3];
1270                         d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]*b);if (d[0] > 255) d[0] = 255;
1271                         d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]*b);if (d[1] > 255) d[1] = 255;
1272                         d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]*b);if (d[2] > 255) d[2] = 255;
1273                         d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]*b);if (d[3] > 255) d[3] = 255;
1274                         pixel[x*4+0] = d[0];
1275                         pixel[x*4+1] = d[1];
1276                         pixel[x*4+2] = d[2];
1277                         pixel[x*4+3] = d[3];
1278                 }
1279                 break;
1280         case DPSOFTRAST_BLENDMODE_ADDALPHA:
1281                 for (x = startx;x < endx;x++)
1282                 {
1283                         if (!pixelmask[x])
1284                                 continue;
1285                         a = in4f[x*4+3] * 255.0f;
1286                         d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1287                         d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1288                         d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1289                         d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1290                         pixel[x*4+0] = d[0];
1291                         pixel[x*4+1] = d[1];
1292                         pixel[x*4+2] = d[2];
1293                         pixel[x*4+3] = d[3];
1294                 }
1295                 break;
1296         case DPSOFTRAST_BLENDMODE_ADD:
1297                 for (x = startx;x < endx;x++)
1298                 {
1299                         if (!pixelmask[x])
1300                                 continue;
1301                         d[0] = (int)(in4f[x*4+2]*255.0f+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1302                         d[1] = (int)(in4f[x*4+1]*255.0f+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1303                         d[2] = (int)(in4f[x*4+0]*255.0f+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1304                         d[3] = (int)(in4f[x*4+3]*255.0f+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1305                         pixel[x*4+0] = d[0];
1306                         pixel[x*4+1] = d[1];
1307                         pixel[x*4+2] = d[2];
1308                         pixel[x*4+3] = d[3];
1309                 }
1310                 break;
1311         case DPSOFTRAST_BLENDMODE_INVMOD:
1312                 for (x = startx;x < endx;x++)
1313                 {
1314                         if (!pixelmask[x])
1315                                 continue;
1316                         d[0] = (int)((1.0f-in4f[x*4+2])*pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1317                         d[1] = (int)((1.0f-in4f[x*4+1])*pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1318                         d[2] = (int)((1.0f-in4f[x*4+0])*pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1319                         d[3] = (int)((1.0f-in4f[x*4+3])*pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1320                         pixel[x*4+0] = d[0];
1321                         pixel[x*4+1] = d[1];
1322                         pixel[x*4+2] = d[2];
1323                         pixel[x*4+3] = d[3];
1324                 }
1325                 break;
1326         case DPSOFTRAST_BLENDMODE_MUL:
1327                 for (x = startx;x < endx;x++)
1328                 {
1329                         if (!pixelmask[x])
1330                                 continue;
1331                         d[0] = (int)(in4f[x*4+2]*pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1332                         d[1] = (int)(in4f[x*4+1]*pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1333                         d[2] = (int)(in4f[x*4+0]*pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1334                         d[3] = (int)(in4f[x*4+3]*pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1335                         pixel[x*4+0] = d[0];
1336                         pixel[x*4+1] = d[1];
1337                         pixel[x*4+2] = d[2];
1338                         pixel[x*4+3] = d[3];
1339                 }
1340                 break;
1341         case DPSOFTRAST_BLENDMODE_MUL2:
1342                 for (x = startx;x < endx;x++)
1343                 {
1344                         if (!pixelmask[x])
1345                                 continue;
1346                         d[0] = (int)(in4f[x*4+2]*pixel[x*4+0]*2.0f);if (d[0] > 255) d[0] = 255;
1347                         d[1] = (int)(in4f[x*4+1]*pixel[x*4+1]*2.0f);if (d[1] > 255) d[1] = 255;
1348                         d[2] = (int)(in4f[x*4+0]*pixel[x*4+2]*2.0f);if (d[2] > 255) d[2] = 255;
1349                         d[3] = (int)(in4f[x*4+3]*pixel[x*4+3]*2.0f);if (d[3] > 255) d[3] = 255;
1350                         pixel[x*4+0] = d[0];
1351                         pixel[x*4+1] = d[1];
1352                         pixel[x*4+2] = d[2];
1353                         pixel[x*4+3] = d[3];
1354                 }
1355                 break;
1356         case DPSOFTRAST_BLENDMODE_SUBALPHA:
1357                 for (x = startx;x < endx;x++)
1358                 {
1359                         if (!pixelmask[x])
1360                                 continue;
1361                         a = in4f[x*4+3] * -255.0f;
1362                         d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;if (d[0] < 0) d[0] = 0;
1363                         d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;if (d[1] < 0) d[1] = 0;
1364                         d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;if (d[2] < 0) d[2] = 0;
1365                         d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;if (d[3] < 0) d[3] = 0;
1366                         pixel[x*4+0] = d[0];
1367                         pixel[x*4+1] = d[1];
1368                         pixel[x*4+2] = d[2];
1369                         pixel[x*4+3] = d[3];
1370                 }
1371                 break;
1372         case DPSOFTRAST_BLENDMODE_PSEUDOALPHA:
1373                 for (x = startx;x < endx;x++)
1374                 {
1375                         if (!pixelmask[x])
1376                                 continue;
1377                         a = 255.0f;
1378                         b = 1.0f - in4f[x*4+3];
1379                         d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]*b);if (d[0] > 255) d[0] = 255;
1380                         d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]*b);if (d[1] > 255) d[1] = 255;
1381                         d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]*b);if (d[2] > 255) d[2] = 255;
1382                         d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]*b);if (d[3] > 255) d[3] = 255;
1383                         pixel[x*4+0] = d[0];
1384                         pixel[x*4+1] = d[1];
1385                         pixel[x*4+2] = d[2];
1386                         pixel[x*4+3] = d[3];
1387                 }
1388                 break;
1389         }
1390 }
1391
1392 void DPSOFTRAST_Draw_Span_FinishBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, const unsigned char* RESTRICT in4ub)
1393 {
1394         int x;
1395         int startx = span->startx;
1396         int endx = span->endx;
1397         int d[4];
1398         const unsigned int * RESTRICT ini = (const unsigned int *)in4ub;
1399         int a, b;
1400         unsigned char * RESTRICT pixelmask = span->pixelmask;
1401         unsigned char * RESTRICT pixel = (unsigned char *)dpsoftrast.fb_colorpixels[0];
1402         unsigned int * RESTRICT pixeli = (unsigned int *)dpsoftrast.fb_colorpixels[0];
1403         if (!pixel)
1404                 return;
1405         pixel += span->start * 4;
1406         pixeli += span->start;
1407         // handle alphatest now (this affects depth writes too)
1408         if (dpsoftrast.user.alphatest)
1409                 for (x = startx;x < endx;x++)
1410                         if (in4ub[x*4+3] < 0.5f)
1411                                 pixelmask[x] = false;
1412         // FIXME: this does not handle bigendian
1413         switch(dpsoftrast.fb_blendmode)
1414         {
1415         case DPSOFTRAST_BLENDMODE_OPAQUE:
1416                 for (x = startx;x < endx;x++)
1417                         if (pixelmask[x])
1418                                 pixeli[x] = ini[x];
1419                 break;
1420         case DPSOFTRAST_BLENDMODE_ALPHA:
1421                 for (x = startx;x < endx;x++)
1422                 {
1423                         if (!pixelmask[x])
1424                                 continue;
1425                         a = in4ub[x*4+3];
1426                         b = 256 - in4ub[x*4+3];
1427                         pixel[x*4+0] = (in4ub[x*4+0]*a+pixel[x*4+0]*b) >> 8;
1428                         pixel[x*4+1] = (in4ub[x*4+1]*a+pixel[x*4+1]*b) >> 8;
1429                         pixel[x*4+2] = (in4ub[x*4+2]*a+pixel[x*4+2]*b) >> 8;
1430                         pixel[x*4+3] = (in4ub[x*4+3]*a+pixel[x*4+3]*b) >> 8;
1431                 }
1432                 break;
1433         case DPSOFTRAST_BLENDMODE_ADDALPHA:
1434                 for (x = startx;x < endx;x++)
1435                 {
1436                         if (!pixelmask[x])
1437                                 continue;
1438                         a = in4ub[x*4+3];
1439                         d[0] = (((in4ub[x*4+0]*a)>>8)+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1440                         d[1] = (((in4ub[x*4+1]*a)>>8)+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1441                         d[2] = (((in4ub[x*4+2]*a)>>8)+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1442                         d[3] = (((in4ub[x*4+3]*a)>>8)+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1443                         pixel[x*4+0] = d[0];
1444                         pixel[x*4+1] = d[1];
1445                         pixel[x*4+2] = d[2];
1446                         pixel[x*4+3] = d[3];
1447                 }
1448                 break;
1449         case DPSOFTRAST_BLENDMODE_ADD:
1450                 for (x = startx;x < endx;x++)
1451                 {
1452                         if (!pixelmask[x])
1453                                 continue;
1454                         d[0] = (in4ub[x*4+0]+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1455                         d[1] = (in4ub[x*4+1]+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1456                         d[2] = (in4ub[x*4+2]+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1457                         d[3] = (in4ub[x*4+3]+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1458                         pixel[x*4+0] = d[0];
1459                         pixel[x*4+1] = d[1];
1460                         pixel[x*4+2] = d[2];
1461                         pixel[x*4+3] = d[3];
1462                 }
1463                 break;
1464         case DPSOFTRAST_BLENDMODE_INVMOD:
1465                 for (x = startx;x < endx;x++)
1466                 {
1467                         if (!pixelmask[x])
1468                                 continue;
1469                         pixel[x*4+0] = ((255-in4ub[x*4+0])*pixel[x*4+0])>>8;
1470                         pixel[x*4+1] = ((255-in4ub[x*4+1])*pixel[x*4+1])>>8;
1471                         pixel[x*4+2] = ((255-in4ub[x*4+2])*pixel[x*4+2])>>8;
1472                         pixel[x*4+3] = ((255-in4ub[x*4+3])*pixel[x*4+3])>>8;
1473                 }
1474                 break;
1475         case DPSOFTRAST_BLENDMODE_MUL:
1476                 for (x = startx;x < endx;x++)
1477                 {
1478                         if (!pixelmask[x])
1479                                 continue;
1480                         pixel[x*4+0] = (in4ub[x*4+0]*pixel[x*4+0])>>8;
1481                         pixel[x*4+1] = (in4ub[x*4+1]*pixel[x*4+1])>>8;
1482                         pixel[x*4+2] = (in4ub[x*4+2]*pixel[x*4+2])>>8;
1483                         pixel[x*4+3] = (in4ub[x*4+3]*pixel[x*4+3])>>8;
1484                 }
1485                 break;
1486         case DPSOFTRAST_BLENDMODE_MUL2:
1487                 for (x = startx;x < endx;x++)
1488                 {
1489                         if (!pixelmask[x])
1490                                 continue;
1491                         d[0] = (in4ub[x*4+0]*pixel[x*4+0])>>7;if (d[0] > 255) d[0] = 255;
1492                         d[1] = (in4ub[x*4+1]*pixel[x*4+1])>>7;if (d[1] > 255) d[1] = 255;
1493                         d[2] = (in4ub[x*4+2]*pixel[x*4+2])>>7;if (d[2] > 255) d[2] = 255;
1494                         d[3] = (in4ub[x*4+3]*pixel[x*4+3])>>7;if (d[3] > 255) d[3] = 255;
1495                         pixel[x*4+0] = d[0];
1496                         pixel[x*4+1] = d[1];
1497                         pixel[x*4+2] = d[2];
1498                         pixel[x*4+3] = d[3];
1499                 }
1500                 break;
1501         case DPSOFTRAST_BLENDMODE_SUBALPHA:
1502                 for (x = startx;x < endx;x++)
1503                 {
1504                         if (!pixelmask[x])
1505                                 continue;
1506                         a = in4ub[x*4+3];
1507                         d[0] = pixel[x*4+0]-((in4ub[x*4+0]*a)>>8);if (d[0] < 0) d[0] = 0;
1508                         d[1] = pixel[x*4+1]-((in4ub[x*4+1]*a)>>8);if (d[1] < 0) d[1] = 0;
1509                         d[2] = pixel[x*4+2]-((in4ub[x*4+2]*a)>>8);if (d[2] < 0) d[2] = 0;
1510                         d[3] = pixel[x*4+3]-((in4ub[x*4+3]*a)>>8);if (d[3] < 0) d[3] = 0;
1511                         pixel[x*4+0] = d[0];
1512                         pixel[x*4+1] = d[1];
1513                         pixel[x*4+2] = d[2];
1514                         pixel[x*4+3] = d[3];
1515                 }
1516                 break;
1517         case DPSOFTRAST_BLENDMODE_PSEUDOALPHA:
1518                 for (x = startx;x < endx;x++)
1519                 {
1520                         if (!pixelmask[x])
1521                                 continue;
1522                         b = 255 - in4ub[x*4+3];
1523                         d[0] = in4ub[x*4+0]+((pixel[x*4+0]*b)>>8);if (d[0] > 255) d[0] = 255;
1524                         d[1] = in4ub[x*4+1]+((pixel[x*4+1]*b)>>8);if (d[1] > 255) d[1] = 255;
1525                         d[2] = in4ub[x*4+2]+((pixel[x*4+2]*b)>>8);if (d[2] > 255) d[2] = 255;
1526                         d[3] = in4ub[x*4+3]+((pixel[x*4+3]*b)>>8);if (d[3] > 255) d[3] = 255;
1527                         pixel[x*4+0] = d[0];
1528                         pixel[x*4+1] = d[1];
1529                         pixel[x*4+2] = d[2];
1530                         pixel[x*4+3] = d[3];
1531                 }
1532                 break;
1533         }
1534 }
1535
1536 void DPSOFTRAST_Draw_Span_Texture2DVarying(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float * RESTRICT out4f, int texunitindex, int arrayindex, const float * RESTRICT zf)
1537 {
1538         int x;
1539         int startx = span->startx;
1540         int endx = span->endx;
1541         int flags;
1542         float c[4];
1543         float data[4];
1544         float slope[4];
1545         float tc[2];
1546         float tcscale[2];
1547         unsigned int tci[2];
1548         unsigned int tci1[2];
1549         unsigned int tcimin[2];
1550         unsigned int tcimax[2];
1551         int tciwrapmask[2];
1552         int tciwidth;
1553         int filter;
1554         int mip;
1555         const unsigned char * RESTRICT pixelbase;
1556         const unsigned char * RESTRICT pixel[4];
1557         DPSOFTRAST_Texture *texture = dpsoftrast.texbound[texunitindex];
1558         // if no texture is bound, just fill it with white
1559         if (!texture)
1560         {
1561                 for (x = startx;x < endx;x++)
1562                 {
1563                         out4f[x*4+0] = 1.0f;
1564                         out4f[x*4+1] = 1.0f;
1565                         out4f[x*4+2] = 1.0f;
1566                         out4f[x*4+3] = 1.0f;
1567                 }
1568                 return;
1569         }
1570         mip = span->mip[texunitindex];
1571         // if this mipmap of the texture is 1 pixel, just fill it with that color
1572         if (texture->mipmap[mip][1] == 4)
1573         {
1574                 c[0] = texture->bytes[2] * (1.0f/255.0f);
1575                 c[1] = texture->bytes[1] * (1.0f/255.0f);
1576                 c[2] = texture->bytes[0] * (1.0f/255.0f);
1577                 c[3] = texture->bytes[3] * (1.0f/255.0f);
1578                 for (x = startx;x < endx;x++)
1579                 {
1580                         out4f[x*4+0] = c[0];
1581                         out4f[x*4+1] = c[1];
1582                         out4f[x*4+2] = c[2];
1583                         out4f[x*4+3] = c[3];
1584                 }
1585                 return;
1586         }
1587         filter = texture->filter & DPSOFTRAST_TEXTURE_FILTER_LINEAR;
1588         data[0] = span->data[0][arrayindex][0];
1589         data[1] = span->data[0][arrayindex][1];
1590         data[2] = span->data[0][arrayindex][2];
1591         data[3] = span->data[0][arrayindex][3];
1592         slope[0] = span->data[1][arrayindex][0];
1593         slope[1] = span->data[1][arrayindex][1];
1594         slope[2] = span->data[1][arrayindex][2];
1595         slope[3] = span->data[1][arrayindex][3];
1596         flags = texture->flags;
1597         pixelbase = (unsigned char *)texture->bytes + texture->mipmap[mip][0];
1598         tcscale[0] = texture->mipmap[mip][2];
1599         tcscale[1] = texture->mipmap[mip][3];
1600         tciwidth = texture->mipmap[mip][2];
1601         tcimin[0] = 0;
1602         tcimin[1] = 0;
1603         tcimax[0] = texture->mipmap[mip][2]-1;
1604         tcimax[1] = texture->mipmap[mip][3]-1;
1605         tciwrapmask[0] = texture->mipmap[mip][2]-1;
1606         tciwrapmask[1] = texture->mipmap[mip][3]-1;
1607         for (x = startx;x < endx;)
1608         {
1609                 float endtc[2];
1610                 unsigned int subtc[2];
1611                 unsigned int substep[2];
1612                 int endsub = x + DPSOFTRAST_MAXSUBSPAN-1;
1613                 float subscale = 4096.0f/(DPSOFTRAST_MAXSUBSPAN-1);
1614                 if (endsub >= endx)
1615                 {
1616                         endsub = endx-1;
1617                         subscale = endsub > x ? 4096.0f / (endsub - x) : 1.0f;
1618                 }
1619                 tc[0] = (data[0] + slope[0]*x) * zf[x] * tcscale[0] - 0.5f;
1620                 tc[1] = (data[1] + slope[1]*x) * zf[x] * tcscale[1] - 0.5f;
1621                 endtc[0] = (data[0] + slope[0]*endsub) * zf[endsub] * tcscale[0] - 0.5f;
1622                 endtc[1] = (data[1] + slope[1]*endsub) * zf[endsub] * tcscale[1] - 0.5f;
1623                 substep[0] = (endtc[0] - tc[0]) * subscale;
1624                 substep[1] = (endtc[1] - tc[1]) * subscale;
1625                 subtc[0] = tc[0] * (1<<12);
1626                 subtc[1] = tc[1] * (1<<12);
1627                 if (!(flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE))
1628                 {
1629                         subtc[0] &= (tciwrapmask[0]<<12)|0xFFF;
1630                         subtc[1] &= (tciwrapmask[1]<<12)|0xFFF;
1631                 }
1632                 if(filter)
1633                 {
1634                         tci[0] = (subtc[0]>>12) - tcimin[0];
1635                         tci[1] = (subtc[1]>>12) - tcimin[1];
1636                         tci1[0] = ((subtc[0] + (endsub - x)*substep[0])>>12);
1637                         tci1[1] = ((subtc[1] + (endsub - x)*substep[1])>>12);
1638                         if (tci[0] <= tcimax[0]-1 && tci[1] <= tcimax[1]-1 && tci1[0] <= tcimax[0]-1 && tci1[1] <= tcimax[1]-1)
1639                         {
1640                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1641                                 {
1642                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1643                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1644                                         unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1645                                         tci[0] = subtc[0]>>12;
1646                                         tci[1] = subtc[1]>>12;
1647                                         pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1648                                         pixel[1] = pixel[0] + 4 * tciwidth;
1649                                         c[0] = (pixel[0][2]*lerp[0]+pixel[0][4+2]*lerp[1]+pixel[1][2]*lerp[2]+pixel[1][4+2]*lerp[3]) * (1.0f / 0xFF000000);
1650                                         c[1] = (pixel[0][1]*lerp[0]+pixel[0][4+1]*lerp[1]+pixel[1][1]*lerp[2]+pixel[1][4+1]*lerp[3]) * (1.0f / 0xFF000000);
1651                                         c[2] = (pixel[0][0]*lerp[0]+pixel[0][4+0]*lerp[1]+pixel[1][0]*lerp[2]+pixel[1][4+0]*lerp[3]) * (1.0f / 0xFF000000);
1652                                         c[3] = (pixel[0][3]*lerp[0]+pixel[0][4+3]*lerp[1]+pixel[1][3]*lerp[2]+pixel[1][4+3]*lerp[3]) * (1.0f / 0xFF000000);
1653                                         out4f[x*4+0] = c[0];
1654                                         out4f[x*4+1] = c[1];
1655                                         out4f[x*4+2] = c[2];
1656                                         out4f[x*4+3] = c[3];
1657                                 }
1658                         }
1659                         else if (flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE)
1660                         {
1661                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1662                                 {
1663                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1664                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1665                                         unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1666                                         tci[0] = subtc[0]>>12;
1667                                         tci[1] = subtc[1]>>12;
1668                                         tci1[0] = tci[0] + 1;
1669                                         tci1[1] = tci[1] + 1;
1670                                         tci[0] = tci[0] >= tcimin[0] ? (tci[0] <= tcimax[0] ? tci[0] : tcimax[0]) : tcimin[0];
1671                                         tci[1] = tci[1] >= tcimin[1] ? (tci[1] <= tcimax[1] ? tci[1] : tcimax[1]) : tcimin[1];
1672                                         tci1[0] = tci1[0] >= tcimin[0] ? (tci1[0] <= tcimax[0] ? tci1[0] : tcimax[0]) : tcimin[0];
1673                                         tci1[1] = tci1[1] >= tcimin[1] ? (tci1[1] <= tcimax[1] ? tci1[1] : tcimax[1]) : tcimin[1];
1674                                         pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1675                                         pixel[1] = pixelbase + 4 * (tci[1]*tciwidth+tci1[0]);
1676                                         pixel[2] = pixelbase + 4 * (tci1[1]*tciwidth+tci[0]);
1677                                         pixel[3] = pixelbase + 4 * (tci1[1]*tciwidth+tci1[0]);
1678                                         c[0] = (pixel[0][2]*lerp[0]+pixel[1][2]*lerp[1]+pixel[2][2]*lerp[2]+pixel[3][2]*lerp[3]) * (1.0f / 0xFF000000);
1679                                         c[1] = (pixel[0][1]*lerp[0]+pixel[1][1]*lerp[1]+pixel[2][1]*lerp[2]+pixel[3][1]*lerp[3]) * (1.0f / 0xFF000000);
1680                                         c[2] = (pixel[0][0]*lerp[0]+pixel[1][0]*lerp[1]+pixel[2][0]*lerp[2]+pixel[3][0]*lerp[3]) * (1.0f / 0xFF000000);
1681                                         c[3] = (pixel[0][3]*lerp[0]+pixel[1][3]*lerp[1]+pixel[2][3]*lerp[2]+pixel[3][3]*lerp[3]) * (1.0f / 0xFF000000);
1682                                         out4f[x*4+0] = c[0];
1683                                         out4f[x*4+1] = c[1];
1684                                         out4f[x*4+2] = c[2];
1685                                         out4f[x*4+3] = c[3];
1686                                 }
1687                         }
1688                         else
1689                         {
1690                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1691                                 {
1692                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1693                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1694                                         unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1695                                         tci[0] = subtc[0]>>12;
1696                                         tci[1] = subtc[1]>>12;
1697                                         tci1[0] = tci[0] + 1;
1698                                         tci1[1] = tci[1] + 1;
1699                                         tci[0] &= tciwrapmask[0];
1700                                         tci[1] &= tciwrapmask[1];
1701                                         tci1[0] &= tciwrapmask[0];
1702                                         tci1[1] &= tciwrapmask[1];
1703                                         pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1704                                         pixel[1] = pixelbase + 4 * (tci[1]*tciwidth+tci1[0]);
1705                                         pixel[2] = pixelbase + 4 * (tci1[1]*tciwidth+tci[0]);
1706                                         pixel[3] = pixelbase + 4 * (tci1[1]*tciwidth+tci1[0]);
1707                                         c[0] = (pixel[0][2]*lerp[0]+pixel[1][2]*lerp[1]+pixel[2][2]*lerp[2]+pixel[3][2]*lerp[3]) * (1.0f / 0xFF000000);
1708                                         c[1] = (pixel[0][1]*lerp[0]+pixel[1][1]*lerp[1]+pixel[2][1]*lerp[2]+pixel[3][1]*lerp[3]) * (1.0f / 0xFF000000);
1709                                         c[2] = (pixel[0][0]*lerp[0]+pixel[1][0]*lerp[1]+pixel[2][0]*lerp[2]+pixel[3][0]*lerp[3]) * (1.0f / 0xFF000000);
1710                                         c[3] = (pixel[0][3]*lerp[0]+pixel[1][3]*lerp[1]+pixel[2][3]*lerp[2]+pixel[3][3]*lerp[3]) * (1.0f / 0xFF000000);
1711                                         out4f[x*4+0] = c[0];
1712                                         out4f[x*4+1] = c[1];
1713                                         out4f[x*4+2] = c[2];
1714                                         out4f[x*4+3] = c[3];
1715                                 }
1716                         }
1717                 }
1718                 else if (flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE)
1719                 {
1720                         for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1721                         {
1722                                 tci[0] = subtc[0]>>12;
1723                                 tci[1] = subtc[1]>>12;
1724                                 tci[0] = tci[0] >= tcimin[0] ? (tci[0] <= tcimax[0] ? tci[0] : tcimax[0]) : tcimin[0];
1725                                 tci[1] = tci[1] >= tcimin[1] ? (tci[1] <= tcimax[1] ? tci[1] : tcimax[1]) : tcimin[1];
1726                                 pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1727                                 c[0] = pixel[0][2] * (1.0f / 255.0f);
1728                                 c[1] = pixel[0][1] * (1.0f / 255.0f);
1729                                 c[2] = pixel[0][0] * (1.0f / 255.0f);
1730                                 c[3] = pixel[0][3] * (1.0f / 255.0f);
1731                                 out4f[x*4+0] = c[0];
1732                                 out4f[x*4+1] = c[1];
1733                                 out4f[x*4+2] = c[2];
1734                                 out4f[x*4+3] = c[3];
1735                         }
1736                 }
1737                 else
1738                 {
1739                         for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1740                         {
1741                                 tci[0] = subtc[0]>>12;
1742                                 tci[1] = subtc[1]>>12;
1743                                 tci[0] &= tciwrapmask[0];
1744                                 tci[1] &= tciwrapmask[1];
1745                                 pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1746                                 c[0] = pixel[0][2] * (1.0f / 255.0f);
1747                                 c[1] = pixel[0][1] * (1.0f / 255.0f);
1748                                 c[2] = pixel[0][0] * (1.0f / 255.0f);
1749                                 c[3] = pixel[0][3] * (1.0f / 255.0f);
1750                                 out4f[x*4+0] = c[0];
1751                                 out4f[x*4+1] = c[1];
1752                                 out4f[x*4+2] = c[2];
1753                                 out4f[x*4+3] = c[3];
1754                         }
1755                 }
1756         }
1757 }
1758
1759 void DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char * RESTRICT out4ub, int texunitindex, int arrayindex, const float * RESTRICT zf)
1760 {
1761         int x;
1762         int startx = span->startx;
1763         int endx = span->endx;
1764         int flags;
1765         float data[4];
1766         float slope[4];
1767         float tc[2];
1768         float tcscale[2];
1769         unsigned int tci[2];
1770         unsigned int tci1[2];
1771         unsigned int tcimin[2];
1772         unsigned int tcimax[2];
1773         int tciwrapmask[2];
1774         int tciwidth;
1775         int filter;
1776         int mip;
1777         unsigned int k;
1778         unsigned int *outi = (unsigned int *)out4ub;
1779         const unsigned char * RESTRICT pixelbase;
1780         const unsigned int * RESTRICT pixelbasei;
1781         const unsigned char * RESTRICT pixel[4];
1782         DPSOFTRAST_Texture *texture = dpsoftrast.texbound[texunitindex];
1783         // if no texture is bound, just fill it with white
1784         if (!texture)
1785         {
1786                 memset(out4ub, 255, span->length*4);
1787                 return;
1788         }
1789         mip = span->mip[texunitindex];
1790         // if this mipmap of the texture is 1 pixel, just fill it with that color
1791         if (texture->mipmap[mip][1] == 4)
1792         {
1793                 k = *((const unsigned int *)texture->bytes);
1794                 for (x = startx;x < endx;x++)
1795                         outi[x] = k;
1796                 return;
1797         }
1798         filter = texture->filter & DPSOFTRAST_TEXTURE_FILTER_LINEAR;
1799         data[0] = span->data[0][arrayindex][0];
1800         data[1] = span->data[0][arrayindex][1];
1801         data[2] = span->data[0][arrayindex][2];
1802         data[3] = span->data[0][arrayindex][3];
1803         slope[0] = span->data[1][arrayindex][0];
1804         slope[1] = span->data[1][arrayindex][1];
1805         slope[2] = span->data[1][arrayindex][2];
1806         slope[3] = span->data[1][arrayindex][3];
1807         flags = texture->flags;
1808         pixelbase = (const unsigned char *)texture->bytes + texture->mipmap[mip][0];
1809         pixelbasei = (const unsigned int *)pixelbase;
1810         tcscale[0] = texture->mipmap[mip][2];
1811         tcscale[1] = texture->mipmap[mip][3];
1812         tciwidth = texture->mipmap[mip][2];
1813         tcimin[0] = 0;
1814         tcimin[1] = 0;
1815         tcimax[0] = texture->mipmap[mip][2]-1;
1816         tcimax[1] = texture->mipmap[mip][3]-1;
1817         tciwrapmask[0] = texture->mipmap[mip][2]-1;
1818         tciwrapmask[1] = texture->mipmap[mip][3]-1;
1819         for (x = startx;x < endx;)
1820         {
1821                 float endtc[2];
1822                 unsigned int subtc[2];
1823                 unsigned int substep[2];
1824                 int endsub = x + DPSOFTRAST_MAXSUBSPAN-1;
1825                 float subscale = 4096.0f/(DPSOFTRAST_MAXSUBSPAN-1);
1826                 if (endsub >= endx)
1827                 {
1828                         endsub = endx-1;
1829                         subscale = endsub > x ? 4096.0f / (endsub - x) : 1.0f;
1830                 }
1831                 tc[0] = (data[0] + slope[0]*x) * zf[x] * tcscale[0] - 0.5f;
1832                 tc[1] = (data[1] + slope[1]*x) * zf[x] * tcscale[1] - 0.5f;
1833                 endtc[0] = (data[0] + slope[0]*endsub) * zf[endsub] * tcscale[0] - 0.5f;
1834                 endtc[1] = (data[1] + slope[1]*endsub) * zf[endsub] * tcscale[1] - 0.5f;
1835                 substep[0] = (endtc[0] - tc[0]) * subscale;
1836                 substep[1] = (endtc[1] - tc[1]) * subscale;
1837                 subtc[0] = tc[0] * (1<<12);
1838                 subtc[1] = tc[1] * (1<<12);
1839                 if (!(flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE))
1840                 {
1841                         subtc[0] &= (tciwrapmask[0]<<12)|0xFFF;
1842                         subtc[1] &= (tciwrapmask[1]<<12)|0xFFF;
1843                 }
1844 #if 0
1845 // LordHavoc: an attempt at reducing number of integer multiplies, did not show any improvement in benchmarks, abandoned.
1846                 if (filter && dpsoftrast_test)
1847                 {
1848                         const unsigned int * RESTRICT pixeli[4];
1849                         tci[0] = (subtc[0]>>12) - tcimin[0];
1850                         tci[1] = (subtc[1]>>12) - tcimin[1];
1851                         tci1[0] = ((subtc[0] + (endsub - x)*substep[0])>>12);
1852                         tci1[1] = ((subtc[1] + (endsub - x)*substep[1])>>12);
1853                         if (tci[0] <= tcimax[0]-1 && tci[1] <= tcimax[1]-1 && tci1[0] <= tcimax[0]-1 && tci1[1] <= tcimax[1]-1)
1854                         {
1855                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1856                                 {
1857                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1858                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1859                                         unsigned int lerp[4] = { (ifrac[0]*ifrac[1]) >> 16, (frac[0]*ifrac[1]) >> 16, (ifrac[0]*frac[1]) >> 16, (frac[0]*frac[1]) >> 16 };
1860                                         tci[0] = subtc[0]>>12;
1861                                         tci[1] = subtc[1]>>12;
1862                                         pixeli[0] = pixelbasei + (tci[1]*tciwidth+tci[0]);
1863                                         pixeli[1] = pixeli[0] + tciwidth;
1864                                         outi[x] = ((((pixeli[0][0] >> 8) & 0x00FF00FF) * lerp[0] + ((pixeli[0][1] >> 8) & 0x00FF00FF) * lerp[1] + ((pixeli[1][0] >> 8) & 0x00FF00FF) * lerp[2] + ((pixeli[1][1] >> 8) & 0x00FF00FF) * lerp[3])     & 0xFF00FF00)
1865                                                 | ((((pixeli[0][0]       & 0x00FF00FF) * lerp[0] + ( pixeli[0][1]       & 0x00FF00FF) * lerp[1] + ( pixeli[1][0]       & 0x00FF00FF) * lerp[2] + ( pixeli[1][1]       & 0x00FF00FF) * lerp[3])>>8) & 0x00FF00FF);
1866                                 }
1867                         }
1868                         else if (flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE)
1869                         {
1870                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1871                                 {
1872                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1873                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1874                                         unsigned int lerp[4] = { (ifrac[0]*ifrac[1]) >> 16, (frac[0]*ifrac[1]) >> 16, (ifrac[0]*frac[1]) >> 16, (frac[0]*frac[1]) >> 16 };
1875                                         tci[0] = subtc[0]>>12;
1876                                         tci[1] = subtc[1]>>12;
1877                                         tci1[0] = tci[0] + 1;
1878                                         tci1[1] = tci[1] + 1;
1879                                         tci[0] = tci[0] >= tcimin[0] ? (tci[0] <= tcimax[0] ? tci[0] : tcimax[0]) : tcimin[0];
1880                                         tci[1] = tci[1] >= tcimin[1] ? (tci[1] <= tcimax[1] ? tci[1] : tcimax[1]) : tcimin[1];
1881                                         tci1[0] = tci1[0] >= tcimin[0] ? (tci1[0] <= tcimax[0] ? tci1[0] : tcimax[0]) : tcimin[0];
1882                                         tci1[1] = tci1[1] >= tcimin[1] ? (tci1[1] <= tcimax[1] ? tci1[1] : tcimax[1]) : tcimin[1];
1883                                         pixeli[0] = pixelbasei + (tci[1]*tciwidth+tci[0]);
1884                                         pixeli[1] = pixelbasei + (tci[1]*tciwidth+tci1[0]);
1885                                         pixeli[2] = pixelbasei + (tci1[1]*tciwidth+tci[0]);
1886                                         pixeli[3] = pixelbasei + (tci1[1]*tciwidth+tci1[0]);
1887                                         outi[x] = ((((pixeli[0][0] >> 8) & 0x00FF00FF) * lerp[0] + ((pixeli[1][0] >> 8) & 0x00FF00FF) * lerp[1] + ((pixeli[2][0] >> 8) & 0x00FF00FF) * lerp[2] + ((pixeli[3][0] >> 8) & 0x00FF00FF) * lerp[3])     & 0xFF00FF00)
1888                                                 | ((((pixeli[0][0]       & 0x00FF00FF) * lerp[0] + ( pixeli[1][0]       & 0x00FF00FF) * lerp[1] + ( pixeli[2][0]       & 0x00FF00FF) * lerp[2] + ( pixeli[3][0]       & 0x00FF00FF) * lerp[3])>>8) & 0x00FF00FF);
1889                                 }
1890                         }
1891                         else
1892                         {
1893                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1894                                 {
1895                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1896                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1897                                         unsigned int lerp[4] = { (ifrac[0]*ifrac[1]) >> 16, (frac[0]*ifrac[1]) >> 16, (ifrac[0]*frac[1]) >> 16, (frac[0]*frac[1]) >> 16 };
1898                                         tci[0] = subtc[0]>>12;
1899                                         tci[1] = subtc[1]>>12;
1900                                         tci1[0] = tci[0] + 1;
1901                                         tci1[1] = tci[1] + 1;
1902                                         tci[0] &= tciwrapmask[0];
1903                                         tci[1] &= tciwrapmask[1];
1904                                         tci1[0] &= tciwrapmask[0];
1905                                         tci1[1] &= tciwrapmask[1];
1906                                         pixeli[0] = pixelbasei + (tci[1]*tciwidth+tci[0]);
1907                                         pixeli[1] = pixelbasei + (tci[1]*tciwidth+tci1[0]);
1908                                         pixeli[2] = pixelbasei + (tci1[1]*tciwidth+tci[0]);
1909                                         pixeli[3] = pixelbasei + (tci1[1]*tciwidth+tci1[0]);
1910                                         outi[x] = ((((pixeli[0][0] >> 8) & 0x00FF00FF) * lerp[0] + ((pixeli[1][0] >> 8) & 0x00FF00FF) * lerp[1] + ((pixeli[2][0] >> 8) & 0x00FF00FF) * lerp[2] + ((pixeli[3][0] >> 8) & 0x00FF00FF) * lerp[3])     & 0xFF00FF00)
1911                                                 | ((((pixeli[0][0]       & 0x00FF00FF) * lerp[0] + ( pixeli[1][0]       & 0x00FF00FF) * lerp[1] + ( pixeli[2][0]       & 0x00FF00FF) * lerp[2] + ( pixeli[3][0]       & 0x00FF00FF) * lerp[3])>>8) & 0x00FF00FF);
1912                                 }
1913                         }
1914                 }
1915                 else
1916 #endif
1917                 if (filter)
1918                 {
1919                         tci[0] = (subtc[0]>>12) - tcimin[0];
1920                         tci[1] = (subtc[1]>>12) - tcimin[1];
1921                         tci1[0] = ((subtc[0] + (endsub - x)*substep[0])>>12);
1922                         tci1[1] = ((subtc[1] + (endsub - x)*substep[1])>>12);
1923                         if (tci[0] <= tcimax[0]-1 && tci[1] <= tcimax[1]-1 && tci1[0] <= tcimax[0]-1 && tci1[1] <= tcimax[1]-1)
1924                         {
1925                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1926                                 {
1927                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1928                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1929                                         unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1930                                         tci[0] = subtc[0]>>12;
1931                                         tci[1] = subtc[1]>>12;
1932                                         pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1933                                         pixel[1] = pixel[0] + 4 * tciwidth;
1934                                         out4ub[x*4+0] = (pixel[0][0]*lerp[0]+pixel[0][4+0]*lerp[1]+pixel[1][0]*lerp[2]+pixel[1][4+0]*lerp[3]) >> 24;
1935                                         out4ub[x*4+1] = (pixel[0][1]*lerp[0]+pixel[0][4+1]*lerp[1]+pixel[1][1]*lerp[2]+pixel[1][4+1]*lerp[3]) >> 24;
1936                                         out4ub[x*4+2] = (pixel[0][2]*lerp[0]+pixel[0][4+2]*lerp[1]+pixel[1][2]*lerp[2]+pixel[1][4+2]*lerp[3]) >> 24;
1937                                         out4ub[x*4+3] = (pixel[0][3]*lerp[0]+pixel[0][4+3]*lerp[1]+pixel[1][3]*lerp[2]+pixel[1][4+3]*lerp[3]) >> 24;
1938                                 }
1939                         }
1940                         else if (flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE)
1941                         {
1942                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1943                                 {
1944                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1945                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1946                                         unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1947                                         tci[0] = subtc[0]>>12;
1948                                         tci[1] = subtc[1]>>12;
1949                                         tci1[0] = tci[0] + 1;
1950                                         tci1[1] = tci[1] + 1;
1951                                         tci[0] = tci[0] >= tcimin[0] ? (tci[0] <= tcimax[0] ? tci[0] : tcimax[0]) : tcimin[0];
1952                                         tci[1] = tci[1] >= tcimin[1] ? (tci[1] <= tcimax[1] ? tci[1] : tcimax[1]) : tcimin[1];
1953                                         tci1[0] = tci1[0] >= tcimin[0] ? (tci1[0] <= tcimax[0] ? tci1[0] : tcimax[0]) : tcimin[0];
1954                                         tci1[1] = tci1[1] >= tcimin[1] ? (tci1[1] <= tcimax[1] ? tci1[1] : tcimax[1]) : tcimin[1];
1955                                         pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1956                                         pixel[1] = pixelbase + 4 * (tci[1]*tciwidth+tci1[0]);
1957                                         pixel[2] = pixelbase + 4 * (tci1[1]*tciwidth+tci[0]);
1958                                         pixel[3] = pixelbase + 4 * (tci1[1]*tciwidth+tci1[0]);
1959                                         out4ub[x*4+0] = (pixel[0][0]*lerp[0]+pixel[1][0]*lerp[1]+pixel[2][0]*lerp[2]+pixel[3][0]*lerp[3]) >> 24;
1960                                         out4ub[x*4+1] = (pixel[0][1]*lerp[0]+pixel[1][1]*lerp[1]+pixel[2][1]*lerp[2]+pixel[3][1]*lerp[3]) >> 24;
1961                                         out4ub[x*4+2] = (pixel[0][2]*lerp[0]+pixel[1][2]*lerp[1]+pixel[2][2]*lerp[2]+pixel[3][2]*lerp[3]) >> 24;
1962                                         out4ub[x*4+3] = (pixel[0][3]*lerp[0]+pixel[1][3]*lerp[1]+pixel[2][3]*lerp[2]+pixel[3][3]*lerp[3]) >> 24;
1963                                 }
1964                         }
1965                         else
1966                         {
1967                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1968                                 {
1969                                         unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1970                                         unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1971                                         unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1972                                         tci[0] = subtc[0]>>12;
1973                                         tci[1] = subtc[1]>>12;
1974                                         tci1[0] = tci[0] + 1;
1975                                         tci1[1] = tci[1] + 1;
1976                                         tci[0] &= tciwrapmask[0];
1977                                         tci[1] &= tciwrapmask[1];
1978                                         tci1[0] &= tciwrapmask[0];
1979                                         tci1[1] &= tciwrapmask[1];
1980                                         pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1981                                         pixel[1] = pixelbase + 4 * (tci[1]*tciwidth+tci1[0]);
1982                                         pixel[2] = pixelbase + 4 * (tci1[1]*tciwidth+tci[0]);
1983                                         pixel[3] = pixelbase + 4 * (tci1[1]*tciwidth+tci1[0]);
1984                                         out4ub[x*4+0] = (pixel[0][0]*lerp[0]+pixel[1][0]*lerp[1]+pixel[2][0]*lerp[2]+pixel[3][0]*lerp[3]) >> 24;
1985                                         out4ub[x*4+1] = (pixel[0][1]*lerp[0]+pixel[1][1]*lerp[1]+pixel[2][1]*lerp[2]+pixel[3][1]*lerp[3]) >> 24;
1986                                         out4ub[x*4+2] = (pixel[0][2]*lerp[0]+pixel[1][2]*lerp[1]+pixel[2][2]*lerp[2]+pixel[3][2]*lerp[3]) >> 24;
1987                                         out4ub[x*4+3] = (pixel[0][3]*lerp[0]+pixel[1][3]*lerp[1]+pixel[2][3]*lerp[2]+pixel[3][3]*lerp[3]) >> 24;
1988                                 }
1989                         }
1990                 }
1991                 else
1992                 {
1993                         tci[0] = (subtc[0]>>12) - tcimin[0];
1994                         tci[1] = (subtc[1]>>12) - tcimin[1];
1995                         tci1[0] = ((subtc[0] + (endsub - x)*substep[0])>>12);
1996                         tci1[1] = ((subtc[1] + (endsub - x)*substep[1])>>12);
1997                         if (tci[0] <= tcimax[0]-1 && tci[1] <= tcimax[1]-1 && tci1[0] <= tcimax[0]-1 && tci1[1] <= tcimax[1]-1)
1998                         {
1999                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
2000                                 {
2001                                         tci[0] = subtc[0]>>12;
2002                                         tci[1] = subtc[1]>>12;
2003                                         outi[x] = pixelbasei[(tci[1]*tciwidth+tci[0])];
2004                                 }
2005                         }
2006                         else if (flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE)
2007                         {
2008                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
2009                                 {
2010                                         tci[0] = subtc[0]>>12;
2011                                         tci[1] = subtc[1]>>12;
2012                                         tci[0] = tci[0] >= tcimin[0] ? (tci[0] <= tcimax[0] ? tci[0] : tcimax[0]) : tcimin[0];
2013                                         tci[1] = tci[1] >= tcimin[1] ? (tci[1] <= tcimax[1] ? tci[1] : tcimax[1]) : tcimin[1];
2014                                         outi[x] = pixelbasei[(tci[1]*tciwidth+tci[0])];
2015                                 }
2016                         }
2017                         else
2018                         {
2019                                 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
2020                                 {
2021                                         tci[0] = subtc[0]>>12;
2022                                         tci[1] = subtc[1]>>12;
2023                                         tci[0] &= tciwrapmask[0];
2024                                         tci[1] &= tciwrapmask[1];
2025                                         outi[x] = pixelbasei[(tci[1]*tciwidth+tci[0])];
2026                                 }
2027                         }
2028                 }
2029         }
2030 }
2031
2032 void DPSOFTRAST_Draw_Span_MultiplyVarying(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *out4f, const float *in4f, int arrayindex, const float *zf)
2033 {
2034         int x;
2035         int startx = span->startx;
2036         int endx = span->endx;
2037         float c[4];
2038         float data[4];
2039         float slope[4];
2040         float z;
2041         data[0] = span->data[0][arrayindex][0];
2042         data[1] = span->data[0][arrayindex][1];
2043         data[2] = span->data[0][arrayindex][2];
2044         data[3] = span->data[0][arrayindex][3];
2045         slope[0] = span->data[1][arrayindex][0];
2046         slope[1] = span->data[1][arrayindex][1];
2047         slope[2] = span->data[1][arrayindex][2];
2048         slope[3] = span->data[1][arrayindex][3];
2049         for (x = startx;x < endx;x++)
2050         {
2051                 z = zf[x];
2052                 c[0] = (data[0] + slope[0]*x) * z;
2053                 c[1] = (data[1] + slope[1]*x) * z;
2054                 c[2] = (data[2] + slope[2]*x) * z;
2055                 c[3] = (data[3] + slope[3]*x) * z;
2056                 out4f[x*4+0] = in4f[x*4+0] * c[0];
2057                 out4f[x*4+1] = in4f[x*4+1] * c[1];
2058                 out4f[x*4+2] = in4f[x*4+2] * c[2];
2059                 out4f[x*4+3] = in4f[x*4+3] * c[3];
2060         }
2061 }
2062
2063 void DPSOFTRAST_Draw_Span_Varying(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *out4f, int arrayindex, const float *zf)
2064 {
2065         int x;
2066         int startx = span->startx;
2067         int endx = span->endx;
2068         float c[4];
2069         float data[4];
2070         float slope[4];
2071         float z;
2072         data[0] = span->data[0][arrayindex][0];
2073         data[1] = span->data[0][arrayindex][1];
2074         data[2] = span->data[0][arrayindex][2];
2075         data[3] = span->data[0][arrayindex][3];
2076         slope[0] = span->data[1][arrayindex][0];
2077         slope[1] = span->data[1][arrayindex][1];
2078         slope[2] = span->data[1][arrayindex][2];
2079         slope[3] = span->data[1][arrayindex][3];
2080         for (x = startx;x < endx;x++)
2081         {
2082                 z = zf[x];
2083                 c[0] = (data[0] + slope[0]*x) * z;
2084                 c[1] = (data[1] + slope[1]*x) * z;
2085                 c[2] = (data[2] + slope[2]*x) * z;
2086                 c[3] = (data[3] + slope[3]*x) * z;
2087                 out4f[x*4+0] = c[0];
2088                 out4f[x*4+1] = c[1];
2089                 out4f[x*4+2] = c[2];
2090                 out4f[x*4+3] = c[3];
2091         }
2092 }
2093
2094 void DPSOFTRAST_Draw_Span_AddBloom(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *out4f, const float *ina4f, const float *inb4f, const float *subcolor)
2095 {
2096         int x, startx = span->startx, endx = span->endx;
2097         float c[4], localcolor[4];
2098         localcolor[0] = subcolor[0];
2099         localcolor[1] = subcolor[1];
2100         localcolor[2] = subcolor[2];
2101         localcolor[3] = subcolor[3];
2102         for (x = startx;x < endx;x++)
2103         {
2104                 c[0] = inb4f[x*4+0] - localcolor[0];if (c[0] < 0.0f) c[0] = 0.0f;
2105                 c[1] = inb4f[x*4+1] - localcolor[1];if (c[1] < 0.0f) c[1] = 0.0f;
2106                 c[2] = inb4f[x*4+2] - localcolor[2];if (c[2] < 0.0f) c[2] = 0.0f;
2107                 c[3] = inb4f[x*4+3] - localcolor[3];if (c[3] < 0.0f) c[3] = 0.0f;
2108                 out4f[x*4+0] = ina4f[x*4+0] + c[0];
2109                 out4f[x*4+1] = ina4f[x*4+1] + c[1];
2110                 out4f[x*4+2] = ina4f[x*4+2] + c[2];
2111                 out4f[x*4+3] = ina4f[x*4+3] + c[3];
2112         }
2113 }
2114
2115 void DPSOFTRAST_Draw_Span_MultiplyBuffers(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *out4f, const float *ina4f, const float *inb4f)
2116 {
2117         int x, startx = span->startx, endx = span->endx;
2118         for (x = startx;x < endx;x++)
2119         {
2120                 out4f[x*4+0] = ina4f[x*4+0] * inb4f[x*4+0];
2121                 out4f[x*4+1] = ina4f[x*4+1] * inb4f[x*4+1];
2122                 out4f[x*4+2] = ina4f[x*4+2] * inb4f[x*4+2];
2123                 out4f[x*4+3] = ina4f[x*4+3] * inb4f[x*4+3];
2124         }
2125 }
2126
2127 void DPSOFTRAST_Draw_Span_AddBuffers(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *out4f, const float *ina4f, const float *inb4f)
2128 {
2129         int x, startx = span->startx, endx = span->endx;
2130         for (x = startx;x < endx;x++)
2131         {
2132                 out4f[x*4+0] = ina4f[x*4+0] + inb4f[x*4+0];
2133                 out4f[x*4+1] = ina4f[x*4+1] + inb4f[x*4+1];
2134                 out4f[x*4+2] = ina4f[x*4+2] + inb4f[x*4+2];
2135                 out4f[x*4+3] = ina4f[x*4+3] + inb4f[x*4+3];
2136         }
2137 }
2138
2139 void DPSOFTRAST_Draw_Span_MixBuffers(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *out4f, const float *ina4f, const float *inb4f)
2140 {
2141         int x, startx = span->startx, endx = span->endx;
2142         float a, b;
2143         for (x = startx;x < endx;x++)
2144         {
2145                 a = 1.0f - inb4f[x*4+3];
2146                 b = inb4f[x*4+3];
2147                 out4f[x*4+0] = ina4f[x*4+0] * a + inb4f[x*4+0] * b;
2148                 out4f[x*4+1] = ina4f[x*4+1] * a + inb4f[x*4+1] * b;
2149                 out4f[x*4+2] = ina4f[x*4+2] * a + inb4f[x*4+2] * b;
2150                 out4f[x*4+3] = ina4f[x*4+3] * a + inb4f[x*4+3] * b;
2151         }
2152 }
2153
2154 void DPSOFTRAST_Draw_Span_MixUniformColor(const DPSOFTRAST_State_Draw_Span * RESTRICT span, float *out4f, const float *in4f, const float *color)
2155 {
2156         int x, startx = span->startx, endx = span->endx;
2157         float localcolor[4], ilerp, lerp;
2158         localcolor[0] = color[0];
2159         localcolor[1] = color[1];
2160         localcolor[2] = color[2];
2161         localcolor[3] = color[3];
2162         ilerp = 1.0f - localcolor[3];
2163         lerp = localcolor[3];
2164         for (x = startx;x < endx;x++)
2165         {
2166                 out4f[x*4+0] = in4f[x*4+0] * ilerp + localcolor[0] * lerp;
2167                 out4f[x*4+1] = in4f[x*4+1] * ilerp + localcolor[1] * lerp;
2168                 out4f[x*4+2] = in4f[x*4+2] * ilerp + localcolor[2] * lerp;
2169                 out4f[x*4+3] = in4f[x*4+3] * ilerp + localcolor[3] * lerp;
2170         }
2171 }
2172
2173
2174
2175 void DPSOFTRAST_Draw_Span_MultiplyVaryingBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, const unsigned char *in4ub, int arrayindex, const float *zf)
2176 {
2177         int x;
2178         int startx = span->startx;
2179         int endx = span->endx;
2180         float data[4];
2181         float slope[4];
2182         float z;
2183         data[2] = span->data[0][arrayindex][0];
2184         data[1] = span->data[0][arrayindex][1];
2185         data[0] = span->data[0][arrayindex][2];
2186         data[3] = span->data[0][arrayindex][3];
2187         slope[2] = span->data[1][arrayindex][0];
2188         slope[1] = span->data[1][arrayindex][1];
2189         slope[0] = span->data[1][arrayindex][2];
2190         slope[3] = span->data[1][arrayindex][3];
2191         for (x = startx;x < endx;x++)
2192         {
2193                 z = zf[x];
2194                 out4ub[x*4+0] = (int)(in4ub[x*4+0] * (data[0] + slope[0]*x) * z);
2195                 out4ub[x*4+1] = (int)(in4ub[x*4+1] * (data[1] + slope[1]*x) * z);
2196                 out4ub[x*4+2] = (int)(in4ub[x*4+2] * (data[2] + slope[2]*x) * z);
2197                 out4ub[x*4+3] = (int)(in4ub[x*4+3] * (data[3] + slope[3]*x) * z);
2198         }
2199 }
2200
2201 void DPSOFTRAST_Draw_Span_VaryingBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, int arrayindex, const float *zf)
2202 {
2203         int x;
2204         int startx = span->startx;
2205         int endx = span->endx;
2206         float data[4];
2207         float slope[4];
2208         float z;
2209         data[2] = span->data[0][arrayindex][0]*255.0f;
2210         data[1] = span->data[0][arrayindex][1]*255.0f;
2211         data[0] = span->data[0][arrayindex][2]*255.0f;
2212         data[3] = span->data[0][arrayindex][3]*255.0f;
2213         slope[2] = span->data[1][arrayindex][0]*255.0f;
2214         slope[1] = span->data[1][arrayindex][1]*255.0f;
2215         slope[0] = span->data[1][arrayindex][2]*255.0f;
2216         slope[3] = span->data[1][arrayindex][3]*255.0f;
2217         for (x = startx;x < endx;x++)
2218         {
2219                 z = zf[x];
2220                 out4ub[x*4+0] = (int)((data[0] + slope[0]*x) * z);
2221                 out4ub[x*4+1] = (int)((data[1] + slope[1]*x) * z);
2222                 out4ub[x*4+2] = (int)((data[2] + slope[2]*x) * z);
2223                 out4ub[x*4+3] = (int)((data[3] + slope[3]*x) * z);
2224         }
2225 }
2226
2227 void DPSOFTRAST_Draw_Span_AddBloomBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, const unsigned char *ina4ub, const unsigned char *inb4ub, const float *subcolor)
2228 {
2229         int x, startx = span->startx, endx = span->endx;
2230         int c[4], localcolor[4];
2231         localcolor[2] = (int)(subcolor[0] * 255.0f);
2232         localcolor[1] = (int)(subcolor[1] * 255.0f);
2233         localcolor[0] = (int)(subcolor[2] * 255.0f);
2234         localcolor[3] = (int)(subcolor[3] * 255.0f);
2235         for (x = startx;x < endx;x++)
2236         {
2237                 c[0] = inb4ub[x*4+0] - localcolor[0];if (c[0] < 0) c[0] = 0;
2238                 c[1] = inb4ub[x*4+1] - localcolor[1];if (c[1] < 0) c[1] = 0;
2239                 c[2] = inb4ub[x*4+2] - localcolor[2];if (c[2] < 0) c[2] = 0;
2240                 c[3] = inb4ub[x*4+3] - localcolor[3];if (c[3] < 0) c[3] = 0;
2241                 c[0] += ina4ub[x*4+0];if (c[0] > 255) c[0] = 255;
2242                 c[1] += ina4ub[x*4+1];if (c[1] > 255) c[1] = 255;
2243                 c[2] += ina4ub[x*4+2];if (c[2] > 255) c[2] = 255;
2244                 c[3] += ina4ub[x*4+3];if (c[3] > 255) c[3] = 255;
2245                 out4ub[x*4+0] = c[0];
2246                 out4ub[x*4+1] = c[1];
2247                 out4ub[x*4+2] = c[2];
2248                 out4ub[x*4+3] = c[3];
2249         }
2250 }
2251
2252 void DPSOFTRAST_Draw_Span_MultiplyBuffersBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, const unsigned char *ina4ub, const unsigned char *inb4ub)
2253 {
2254         int x, startx = span->startx, endx = span->endx;
2255         for (x = startx;x < endx;x++)
2256         {
2257                 out4ub[x*4+0] = (ina4ub[x*4+0] * inb4ub[x*4+0])>>8;
2258                 out4ub[x*4+1] = (ina4ub[x*4+1] * inb4ub[x*4+1])>>8;
2259                 out4ub[x*4+2] = (ina4ub[x*4+2] * inb4ub[x*4+2])>>8;
2260                 out4ub[x*4+3] = (ina4ub[x*4+3] * inb4ub[x*4+3])>>8;
2261         }
2262 }
2263
2264 void DPSOFTRAST_Draw_Span_AddBuffersBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, const unsigned char *ina4ub, const unsigned char *inb4ub)
2265 {
2266         int x, startx = span->startx, endx = span->endx;
2267         int d[4];
2268         for (x = startx;x < endx;x++)
2269         {
2270                 d[0] = ina4ub[x*4+0] + inb4ub[x*4+0];if (d[0] > 255) d[0] = 255;
2271                 d[1] = ina4ub[x*4+1] + inb4ub[x*4+1];if (d[1] > 255) d[1] = 255;
2272                 d[2] = ina4ub[x*4+2] + inb4ub[x*4+2];if (d[2] > 255) d[2] = 255;
2273                 d[3] = ina4ub[x*4+3] + inb4ub[x*4+3];if (d[3] > 255) d[3] = 255;
2274                 out4ub[x*4+0] = d[0];
2275                 out4ub[x*4+1] = d[1];
2276                 out4ub[x*4+2] = d[2];
2277                 out4ub[x*4+3] = d[3];
2278         }
2279 }
2280
2281 void DPSOFTRAST_Draw_Span_TintedAddBuffersBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, const unsigned char *ina4ub, const unsigned char *inb4ub, const float *inbtintbgra)
2282 {
2283         int x, startx = span->startx, endx = span->endx;
2284         int d[4];
2285         int b[4];
2286         b[0] = (int)(inbtintbgra[0] * 256.0f);
2287         b[1] = (int)(inbtintbgra[1] * 256.0f);
2288         b[2] = (int)(inbtintbgra[2] * 256.0f);
2289         b[3] = (int)(inbtintbgra[3] * 256.0f);
2290         for (x = startx;x < endx;x++)
2291         {
2292                 d[0] = ina4ub[x*4+0] + ((inb4ub[x*4+0]*b[0])>>8);if (d[0] > 255) d[0] = 255;
2293                 d[1] = ina4ub[x*4+1] + ((inb4ub[x*4+1]*b[1])>>8);if (d[1] > 255) d[1] = 255;
2294                 d[2] = ina4ub[x*4+2] + ((inb4ub[x*4+2]*b[2])>>8);if (d[2] > 255) d[2] = 255;
2295                 d[3] = ina4ub[x*4+3] + ((inb4ub[x*4+3]*b[3])>>8);if (d[3] > 255) d[3] = 255;
2296                 out4ub[x*4+0] = d[0];
2297                 out4ub[x*4+1] = d[1];
2298                 out4ub[x*4+2] = d[2];
2299                 out4ub[x*4+3] = d[3];
2300         }
2301 }
2302
2303 void DPSOFTRAST_Draw_Span_MixBuffersBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, const unsigned char *ina4ub, const unsigned char *inb4ub)
2304 {
2305         int x, startx = span->startx, endx = span->endx;
2306         int a, b;
2307         for (x = startx;x < endx;x++)
2308         {
2309                 a = 256 - inb4ub[x*4+3];
2310                 b = inb4ub[x*4+3];
2311                 out4ub[x*4+0] = (ina4ub[x*4+0] * a + inb4ub[x*4+0] * b)>>8;
2312                 out4ub[x*4+1] = (ina4ub[x*4+1] * a + inb4ub[x*4+1] * b)>>8;
2313                 out4ub[x*4+2] = (ina4ub[x*4+2] * a + inb4ub[x*4+2] * b)>>8;
2314                 out4ub[x*4+3] = (ina4ub[x*4+3] * a + inb4ub[x*4+3] * b)>>8;
2315         }
2316 }
2317
2318 void DPSOFTRAST_Draw_Span_MixUniformColorBGRA8(const DPSOFTRAST_State_Draw_Span * RESTRICT span, unsigned char *out4ub, const unsigned char *in4ub, const float *color)
2319 {
2320         int x, startx = span->startx, endx = span->endx;
2321         int localcolor[4], ilerp, lerp;
2322         localcolor[2] = (int)(color[0]*255.0f);
2323         localcolor[1] = (int)(color[1]*255.0f);
2324         localcolor[0] = (int)(color[2]*255.0f);
2325         localcolor[3] = (int)(color[3]*255.0f);
2326         ilerp = 256 - localcolor[3];
2327         lerp = localcolor[3];
2328         for (x = startx;x < endx;x++)
2329         {
2330                 out4ub[x*4+0] = (in4ub[x*4+0] * ilerp + localcolor[0] * lerp)>>8;
2331                 out4ub[x*4+1] = (in4ub[x*4+1] * ilerp + localcolor[1] * lerp)>>8;
2332                 out4ub[x*4+2] = (in4ub[x*4+2] * ilerp + localcolor[2] * lerp)>>8;
2333                 out4ub[x*4+3] = (in4ub[x*4+3] * ilerp + localcolor[3] * lerp)>>8;
2334         }
2335 }
2336
2337
2338
2339 void DPSOFTRAST_VertexShader_Generic(void)
2340 {
2341         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2342         DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.numvertices);
2343         DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
2344         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_SPECULAR)
2345                 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD1], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD1], dpsoftrast.draw.numvertices);
2346 }
2347
2348 void DPSOFTRAST_PixelShader_Generic(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2349 {
2350         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2351         unsigned char buffer_texture_colorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2352         unsigned char buffer_texture_lightmapbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2353         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2354         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2355         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_DIFFUSE)
2356         {
2357                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_colorbgra8, GL20TU_FIRST, 2, buffer_z);
2358                 DPSOFTRAST_Draw_Span_MultiplyVaryingBGRA8(span, buffer_FragColorbgra8, buffer_texture_colorbgra8, 1, buffer_z);
2359                 if (dpsoftrast.shader_permutation & SHADERPERMUTATION_SPECULAR)
2360                 {
2361                         DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_lightmapbgra8, GL20TU_SECOND, 2, buffer_z);
2362                         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_COLORMAPPING)
2363                         {
2364                                 // multiply
2365                                 DPSOFTRAST_Draw_Span_MultiplyBuffersBGRA8(span, buffer_FragColorbgra8, buffer_FragColorbgra8, buffer_texture_lightmapbgra8);
2366                         }
2367                         else if (dpsoftrast.shader_permutation & SHADERPERMUTATION_COLORMAPPING)
2368                         {
2369                                 // add
2370                                 DPSOFTRAST_Draw_Span_AddBuffersBGRA8(span, buffer_FragColorbgra8, buffer_FragColorbgra8, buffer_texture_lightmapbgra8);
2371                         }
2372                         else if (dpsoftrast.shader_permutation & SHADERPERMUTATION_VERTEXTEXTUREBLEND)
2373                         {
2374                                 // alphablend
2375                                 DPSOFTRAST_Draw_Span_MixBuffersBGRA8(span, buffer_FragColorbgra8, buffer_FragColorbgra8, buffer_texture_lightmapbgra8);
2376                         }
2377                 }
2378         }
2379         else
2380                 DPSOFTRAST_Draw_Span_VaryingBGRA8(span, buffer_FragColorbgra8, 1, buffer_z);
2381         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2382 }
2383
2384
2385
2386 void DPSOFTRAST_VertexShader_PostProcess(void)
2387 {
2388         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2389         DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
2390         DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD1], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD1], dpsoftrast.draw.numvertices);
2391 }
2392
2393 void DPSOFTRAST_PixelShader_PostProcess(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2394 {
2395         // TODO: optimize!!  at the very least there is no reason to use texture sampling on the frame texture
2396         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2397         unsigned char buffer_texture_colorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2398         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2399         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2400         DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_FragColorbgra8, GL20TU_FIRST, 2, buffer_z);
2401         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_BLOOM)
2402         {
2403                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_colorbgra8, GL20TU_SECOND, 3, buffer_z);
2404                 DPSOFTRAST_Draw_Span_AddBloomBGRA8(span, buffer_FragColorbgra8, buffer_FragColorbgra8, buffer_texture_colorbgra8, dpsoftrast.uniform4f + DPSOFTRAST_UNIFORM_BloomColorSubtract * 4);
2405         }
2406         DPSOFTRAST_Draw_Span_MixUniformColorBGRA8(span, buffer_FragColorbgra8, buffer_FragColorbgra8, dpsoftrast.uniform4f + DPSOFTRAST_UNIFORM_ViewTintColor * 4);
2407         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_SATURATION)
2408         {
2409                 // TODO: implement saturation
2410         }
2411         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_GAMMARAMPS)
2412         {
2413                 // TODO: implement gammaramps
2414         }
2415         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2416 }
2417
2418
2419
2420 void DPSOFTRAST_VertexShader_Depth_Or_Shadow(void)
2421 {
2422         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2423 }
2424
2425 void DPSOFTRAST_PixelShader_Depth_Or_Shadow(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2426 {
2427         // this is never called (because colormask is off when this shader is used)
2428         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2429         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2430         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2431         memset(buffer_FragColorbgra8, 0, span->length*4);
2432         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2433 }
2434
2435
2436
2437 void DPSOFTRAST_VertexShader_FlatColor(void)
2438 {
2439         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2440         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_TexMatrixM1);
2441 }
2442
2443 void DPSOFTRAST_PixelShader_FlatColor(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2444 {
2445         int x, startx = span->startx, endx = span->endx;
2446         int Color_Ambienti[4];
2447         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2448         unsigned char buffer_texture_colorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2449         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2450         Color_Ambienti[2] = (int)(dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0]*256.0f);
2451         Color_Ambienti[1] = (int)(dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1]*256.0f);
2452         Color_Ambienti[0] = (int)(dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2]*256.0f);
2453         Color_Ambienti[3] = (int)(dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0]        *256.0f);
2454         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2455         DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_colorbgra8, GL20TU_COLOR, 2, buffer_z);
2456         for (x = startx;x < endx;x++)
2457         {
2458                 buffer_FragColorbgra8[x*4+0] = (buffer_texture_colorbgra8[x*4+0] * Color_Ambienti[0])>>8;
2459                 buffer_FragColorbgra8[x*4+1] = (buffer_texture_colorbgra8[x*4+1] * Color_Ambienti[1])>>8;
2460                 buffer_FragColorbgra8[x*4+2] = (buffer_texture_colorbgra8[x*4+2] * Color_Ambienti[2])>>8;
2461                 buffer_FragColorbgra8[x*4+3] = (buffer_texture_colorbgra8[x*4+3] * Color_Ambienti[3])>>8;
2462         }
2463         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2464 }
2465
2466
2467
2468 void DPSOFTRAST_VertexShader_VertexColor(void)
2469 {
2470         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2471         DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.numvertices);
2472         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_TexMatrixM1);
2473 }
2474
2475 void DPSOFTRAST_PixelShader_VertexColor(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2476 {
2477         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2478         unsigned char buffer_texture_colorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2479         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2480         int x, startx = span->startx, endx = span->endx;
2481         float Color_Ambient[4], Color_Diffuse[4];
2482         float data[4];
2483         float slope[4];
2484         float z;
2485         int arrayindex = DPSOFTRAST_ARRAY_COLOR;
2486         data[2] = span->data[0][arrayindex][0];
2487         data[1] = span->data[0][arrayindex][1];
2488         data[0] = span->data[0][arrayindex][2];
2489         data[3] = span->data[0][arrayindex][3];
2490         slope[2] = span->data[1][arrayindex][0];
2491         slope[1] = span->data[1][arrayindex][1];
2492         slope[0] = span->data[1][arrayindex][2];
2493         slope[3] = span->data[1][arrayindex][3];
2494         Color_Ambient[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0];
2495         Color_Ambient[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1];
2496         Color_Ambient[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2];
2497         Color_Ambient[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0];
2498         Color_Diffuse[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+0];
2499         Color_Diffuse[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+1];
2500         Color_Diffuse[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+2];
2501         Color_Diffuse[3] = 0.0f;
2502         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2503         DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_colorbgra8, GL20TU_COLOR, 2, buffer_z);
2504         for (x = startx;x < endx;x++)
2505         {
2506                 z = buffer_z[x];
2507                 buffer_FragColorbgra8[x*4+0] = (int)(buffer_texture_colorbgra8[x*4+0] * (Color_Ambient[0] + ((data[0] + slope[0]*x) * z) * Color_Diffuse[0]));
2508                 buffer_FragColorbgra8[x*4+1] = (int)(buffer_texture_colorbgra8[x*4+1] * (Color_Ambient[1] + ((data[1] + slope[1]*x) * z) * Color_Diffuse[1]));
2509                 buffer_FragColorbgra8[x*4+2] = (int)(buffer_texture_colorbgra8[x*4+2] * (Color_Ambient[2] + ((data[2] + slope[2]*x) * z) * Color_Diffuse[2]));
2510                 buffer_FragColorbgra8[x*4+3] = (int)(buffer_texture_colorbgra8[x*4+3] * (Color_Ambient[3] + ((data[3] + slope[3]*x) * z) * Color_Diffuse[3]));
2511         }
2512         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2513 }
2514
2515
2516
2517 void DPSOFTRAST_VertexShader_Lightmap(void)
2518 {
2519         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2520         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_TexMatrixM1);
2521         DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD4], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD4], dpsoftrast.draw.numvertices);
2522 }
2523
2524 void DPSOFTRAST_PixelShader_Lightmap(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2525 {
2526         int x, startx = span->startx, endx = span->endx;
2527         float Color_Ambient[4], Color_Diffuse[4];
2528         int Color_Ambienti[4];
2529         int Color_Diffusei[4];
2530         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2531         unsigned char buffer_texture_colorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2532         unsigned char buffer_texture_lightmapbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2533         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2534         unsigned int d[4];
2535         //unsigned char * RESTRICT pixelmask = span->pixelmask;
2536         //unsigned char * RESTRICT pixel = (unsigned char *)dpsoftrast.fb_colorpixels[0] + span->start * 4;
2537         Color_Ambient[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0];
2538         Color_Ambient[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1];
2539         Color_Ambient[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2];
2540         Color_Ambient[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0];
2541         Color_Diffuse[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+0];
2542         Color_Diffuse[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+1];
2543         Color_Diffuse[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+2];
2544         Color_Diffuse[3] = 0.0f;
2545         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2546         Color_Ambienti[2] = (int)(Color_Ambient[0] * 65536.0f);
2547         Color_Ambienti[1] = (int)(Color_Ambient[1] * 65536.0f);
2548         Color_Ambienti[0] = (int)(Color_Ambient[2] * 65536.0f);
2549         Color_Ambienti[3] = (int)(Color_Ambient[3] * 65536.0f);
2550         Color_Diffusei[2] = (int)(Color_Diffuse[0] * 256.0f);
2551         Color_Diffusei[1] = (int)(Color_Diffuse[1] * 256.0f);
2552         Color_Diffusei[0] = (int)(Color_Diffuse[2] * 256.0f);
2553         Color_Diffusei[3] = (int)(Color_Diffuse[3] * 256.0f);
2554         DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_colorbgra8, GL20TU_COLOR, 2, buffer_z);
2555         DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_lightmapbgra8, GL20TU_LIGHTMAP, 6, buffer_z);
2556         for (x = startx;x < endx;x++)
2557         {
2558                 d[0] = (buffer_texture_colorbgra8[x*4+0] * (Color_Ambienti[0] + buffer_texture_lightmapbgra8[x*4+0] * Color_Diffusei[0])) >> 16;if (d[0] > 255) d[0] = 255;
2559                 d[1] = (buffer_texture_colorbgra8[x*4+1] * (Color_Ambienti[1] + buffer_texture_lightmapbgra8[x*4+1] * Color_Diffusei[1])) >> 16;if (d[1] > 255) d[1] = 255;
2560                 d[2] = (buffer_texture_colorbgra8[x*4+2] * (Color_Ambienti[2] + buffer_texture_lightmapbgra8[x*4+2] * Color_Diffusei[2])) >> 16;if (d[2] > 255) d[2] = 255;
2561                 d[3] = (buffer_texture_colorbgra8[x*4+3] * (Color_Ambienti[3] + buffer_texture_lightmapbgra8[x*4+3] * Color_Diffusei[3])) >> 16;if (d[3] > 255) d[3] = 255;
2562                 buffer_FragColorbgra8[x*4+0] = d[0];
2563                 buffer_FragColorbgra8[x*4+1] = d[1];
2564                 buffer_FragColorbgra8[x*4+2] = d[2];
2565                 buffer_FragColorbgra8[x*4+3] = d[3];
2566         }
2567         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2568 }
2569
2570
2571
2572 void DPSOFTRAST_VertexShader_FakeLight(void)
2573 {
2574         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2575 }
2576
2577 void DPSOFTRAST_PixelShader_FakeLight(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2578 {
2579         // TODO: IMPLEMENT
2580         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2581         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2582         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2583         memset(buffer_FragColorbgra8, 0, span->length*4);
2584         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2585 }
2586
2587
2588
2589 void DPSOFTRAST_VertexShader_LightDirectionMap_ModelSpace(void)
2590 {
2591         DPSOFTRAST_VertexShader_Lightmap();
2592 }
2593
2594 void DPSOFTRAST_PixelShader_LightDirectionMap_ModelSpace(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2595 {
2596         DPSOFTRAST_PixelShader_Lightmap(span);
2597         // TODO: IMPLEMENT
2598 }
2599
2600
2601
2602 void DPSOFTRAST_VertexShader_LightDirectionMap_TangentSpace(void)
2603 {
2604         DPSOFTRAST_VertexShader_Lightmap();
2605 }
2606
2607 void DPSOFTRAST_PixelShader_LightDirectionMap_TangentSpace(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2608 {
2609         DPSOFTRAST_PixelShader_Lightmap(span);
2610         // TODO: IMPLEMENT
2611 }
2612
2613
2614
2615 void DPSOFTRAST_VertexShader_LightDirection(void)
2616 {
2617         int i;
2618         int numvertices = dpsoftrast.draw.numvertices;
2619         float LightDir[4];
2620         float LightVector[4];
2621         float EyePosition[4];
2622         float EyeVectorModelSpace[4];
2623         float EyeVector[4];
2624         float position[4];
2625         float svector[4];
2626         float tvector[4];
2627         float normal[4];
2628         LightDir[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightDir*4+0];
2629         LightDir[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightDir*4+1];
2630         LightDir[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightDir*4+2];
2631         LightDir[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightDir*4+3];
2632         EyePosition[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_EyePosition*4+0];
2633         EyePosition[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_EyePosition*4+1];
2634         EyePosition[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_EyePosition*4+2];
2635         EyePosition[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_EyePosition*4+3];
2636         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2637         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_TexMatrixM1);
2638         for (i = 0;i < numvertices;i++)
2639         {
2640                 position[0] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+0];
2641                 position[1] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+1];
2642                 position[2] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+2];
2643                 svector[0] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD1][i*4+0];
2644                 svector[1] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD1][i*4+1];
2645                 svector[2] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD1][i*4+2];
2646                 tvector[0] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD2][i*4+0];
2647                 tvector[1] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD2][i*4+1];
2648                 tvector[2] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD2][i*4+2];
2649                 normal[0] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD3][i*4+0];
2650                 normal[1] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD3][i*4+1];
2651                 normal[2] = dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD3][i*4+2];
2652                 LightVector[0] = svector[0] * LightDir[0] + svector[1] * LightDir[1] + svector[2] * LightDir[2];
2653                 LightVector[1] = tvector[0] * LightDir[0] + tvector[1] * LightDir[1] + tvector[2] * LightDir[2];
2654                 LightVector[2] = normal[0] * LightDir[0] + normal[1] * LightDir[1] + normal[2] * LightDir[2];
2655                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD1][i*4+0] = LightVector[0];
2656                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD1][i*4+1] = LightVector[1];
2657                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD1][i*4+2] = LightVector[2];
2658                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD1][i*4+3] = 0.0f;
2659                 EyeVectorModelSpace[0] = EyePosition[0] - position[0];
2660                 EyeVectorModelSpace[1] = EyePosition[1] - position[1];
2661                 EyeVectorModelSpace[2] = EyePosition[2] - position[2];
2662                 EyeVector[0] = svector[0] * EyeVectorModelSpace[0] + svector[1] * EyeVectorModelSpace[1] + svector[2] * EyeVectorModelSpace[2];
2663                 EyeVector[1] = tvector[0] * EyeVectorModelSpace[0] + tvector[1] * EyeVectorModelSpace[1] + tvector[2] * EyeVectorModelSpace[2];
2664                 EyeVector[2] = normal[0]  * EyeVectorModelSpace[0] + normal[1]  * EyeVectorModelSpace[1] + normal[2]  * EyeVectorModelSpace[2];
2665                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD2][i*4+0] = EyeVector[0];
2666                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD2][i*4+1] = EyeVector[1];
2667                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD2][i*4+2] = EyeVector[2];
2668                 dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD2][i*4+3] = 0.0f;
2669         }
2670 }
2671
2672 #define DPSOFTRAST_Min(a,b) ((a) < (b) ? (a) : (b))
2673 #define DPSOFTRAST_Max(a,b) ((a) > (b) ? (a) : (b))
2674 #define DPSOFTRAST_Vector3Dot(a,b) ((a)[0]*(b)[0]+(a)[1]*(b)[1]+(a)[2]*(b)[2])
2675 #define DPSOFTRAST_Vector3LengthSquared(v) (DPSOFTRAST_Vector3Dot((v),(v)))
2676 #define DPSOFTRAST_Vector3Length(v) (sqrt(DPSOFTRAST_Vector3LengthSquared(v)))
2677 #define DPSOFTRAST_Vector3Normalize(v)\
2678 do\
2679 {\
2680         float len = sqrt(DPSOFTRAST_Vector3Dot(v,v));\
2681         if (len)\
2682         {\
2683                 len = 1.0f / len;\
2684                 v[0] *= len;\
2685                 v[1] *= len;\
2686                 v[2] *= len;\
2687         }\
2688 }\
2689 while(0)
2690
2691 void DPSOFTRAST_PixelShader_LightDirection(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2692 {
2693         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2694         unsigned char buffer_texture_colorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2695         unsigned char buffer_texture_normalbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2696         unsigned char buffer_texture_glossbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2697         unsigned char buffer_texture_glowbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2698         unsigned char buffer_texture_pantsbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2699         unsigned char buffer_texture_shirtbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2700         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2701         int x, startx = span->startx, endx = span->endx;
2702         float Color_Ambient[4], Color_Diffuse[4], Color_Specular[4], Color_Glow[4], Color_Pants[4], Color_Shirt[4], LightColor[4];
2703         float LightVectordata[4];
2704         float LightVectorslope[4];
2705         float EyeVectordata[4];
2706         float EyeVectorslope[4];
2707         float z;
2708         float diffusetex[4];
2709         float glosstex[4];
2710         float surfacenormal[4];
2711         float lightnormal[4];
2712         float eyenormal[4];
2713         float specularnormal[4];
2714         float diffuse;
2715         float specular;
2716         float SpecularPower;
2717         int d[4];
2718         Color_Glow[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Glow*4+0];
2719         Color_Glow[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Glow*4+1];
2720         Color_Glow[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Glow*4+2];
2721         Color_Glow[3] = 0.0f;
2722         Color_Ambient[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0];
2723         Color_Ambient[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1];
2724         Color_Ambient[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2];
2725         Color_Ambient[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0];
2726         Color_Pants[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Pants*4+0];
2727         Color_Pants[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Pants*4+1];
2728         Color_Pants[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Pants*4+2];
2729         Color_Pants[3] = 0.0f;
2730         Color_Shirt[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Shirt*4+0];
2731         Color_Shirt[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Shirt*4+1];
2732         Color_Shirt[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Shirt*4+2];
2733         Color_Shirt[3] = 0.0f;
2734         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2735         DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_colorbgra8, GL20TU_COLOR, DPSOFTRAST_ARRAY_TEXCOORD0, buffer_z);
2736         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_COLORMAPPING)
2737         {
2738                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_pantsbgra8, GL20TU_PANTS, DPSOFTRAST_ARRAY_TEXCOORD0, buffer_z);
2739                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_shirtbgra8, GL20TU_SHIRT, DPSOFTRAST_ARRAY_TEXCOORD0, buffer_z);
2740         }
2741         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_GLOW)
2742         {
2743                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_glowbgra8, GL20TU_GLOW, DPSOFTRAST_ARRAY_TEXCOORD0, buffer_z);
2744         }
2745         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_SPECULAR)
2746         {
2747                 Color_Diffuse[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+0];
2748                 Color_Diffuse[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+1];
2749                 Color_Diffuse[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+2];
2750                 Color_Diffuse[3] = 0.0f;
2751                 LightColor[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightColor*4+0];
2752                 LightColor[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightColor*4+1];
2753                 LightColor[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightColor*4+2];
2754                 LightColor[3] = 0.0f;
2755                 LightVectordata[0]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][0];
2756                 LightVectordata[1]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][1];
2757                 LightVectordata[2]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][2];
2758                 LightVectordata[3]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][3];
2759                 LightVectorslope[0] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][0];
2760                 LightVectorslope[1] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][1];
2761                 LightVectorslope[2] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][2];
2762                 LightVectorslope[3] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][3];
2763                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_normalbgra8, GL20TU_NORMAL, DPSOFTRAST_ARRAY_TEXCOORD0, buffer_z);
2764                 Color_Specular[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Specular*4+0];
2765                 Color_Specular[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Specular*4+1];
2766                 Color_Specular[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Specular*4+2];
2767                 Color_Specular[3] = 0.0f;
2768                 SpecularPower = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_SpecularPower*4+0];
2769                 EyeVectordata[0]    = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD2][0];
2770                 EyeVectordata[1]    = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD2][1];
2771                 EyeVectordata[2]    = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD2][2];
2772                 EyeVectordata[3]    = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD2][3];
2773                 EyeVectorslope[0]   = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD2][0];
2774                 EyeVectorslope[1]   = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD2][1];
2775                 EyeVectorslope[2]   = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD2][2];
2776                 EyeVectorslope[3]   = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD2][3];
2777                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_glossbgra8, GL20TU_GLOSS, DPSOFTRAST_ARRAY_TEXCOORD0, buffer_z);
2778                 for (x = startx;x < endx;x++)
2779                 {
2780                         z = buffer_z[x];
2781                         diffusetex[0] = buffer_texture_colorbgra8[x*4+0];
2782                         diffusetex[1] = buffer_texture_colorbgra8[x*4+1];
2783                         diffusetex[2] = buffer_texture_colorbgra8[x*4+2];
2784                         diffusetex[3] = buffer_texture_colorbgra8[x*4+3];
2785                         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_COLORMAPPING)
2786                         {
2787                                 diffusetex[0] += buffer_texture_pantsbgra8[x*4+0] * Color_Pants[0] + buffer_texture_shirtbgra8[x*4+0] * Color_Shirt[0];
2788                                 diffusetex[1] += buffer_texture_pantsbgra8[x*4+1] * Color_Pants[1] + buffer_texture_shirtbgra8[x*4+1] * Color_Shirt[1];
2789                                 diffusetex[2] += buffer_texture_pantsbgra8[x*4+2] * Color_Pants[2] + buffer_texture_shirtbgra8[x*4+2] * Color_Shirt[2];
2790                                 diffusetex[3] += buffer_texture_pantsbgra8[x*4+3] * Color_Pants[3] + buffer_texture_shirtbgra8[x*4+3] * Color_Shirt[3];
2791                         }
2792                         glosstex[0] = buffer_texture_glossbgra8[x*4+0];
2793                         glosstex[1] = buffer_texture_glossbgra8[x*4+1];
2794                         glosstex[2] = buffer_texture_glossbgra8[x*4+2];
2795                         glosstex[3] = buffer_texture_glossbgra8[x*4+3];
2796                         surfacenormal[0] = buffer_texture_normalbgra8[x*4+2] * (1.0f / 128.0f) - 1.0f;
2797                         surfacenormal[1] = buffer_texture_normalbgra8[x*4+1] * (1.0f / 128.0f) - 1.0f;
2798                         surfacenormal[2] = buffer_texture_normalbgra8[x*4+0] * (1.0f / 128.0f) - 1.0f;
2799                         DPSOFTRAST_Vector3Normalize(surfacenormal);
2800
2801                         lightnormal[0] = (LightVectordata[0] + LightVectorslope[0]*x) * z;
2802                         lightnormal[1] = (LightVectordata[1] + LightVectorslope[1]*x) * z;
2803                         lightnormal[2] = (LightVectordata[2] + LightVectorslope[2]*x) * z;
2804                         DPSOFTRAST_Vector3Normalize(lightnormal);
2805
2806                         eyenormal[0] = (EyeVectordata[0] + EyeVectorslope[0]*x) * z;
2807                         eyenormal[1] = (EyeVectordata[1] + EyeVectorslope[1]*x) * z;
2808                         eyenormal[2] = (EyeVectordata[2] + EyeVectorslope[2]*x) * z;
2809                         DPSOFTRAST_Vector3Normalize(eyenormal);
2810
2811                         specularnormal[0] = lightnormal[0] + eyenormal[0];
2812                         specularnormal[1] = lightnormal[1] + eyenormal[1];
2813                         specularnormal[2] = lightnormal[2] + eyenormal[2];
2814                         DPSOFTRAST_Vector3Normalize(specularnormal);
2815
2816                         diffuse = DPSOFTRAST_Vector3Dot(surfacenormal, lightnormal);if (diffuse < 0.0f) diffuse = 0.0f;
2817                         specular = DPSOFTRAST_Vector3Dot(surfacenormal, specularnormal);if (specular < 0.0f) specular = 0.0f;
2818                         specular = pow(specular, SpecularPower * glosstex[3]);
2819                         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_GLOW)
2820                         {
2821                                 d[0] = (int)(buffer_texture_glowbgra8[x*4+0] * Color_Glow[0] + diffusetex[0] * Color_Ambient[0] + (diffusetex[0] * Color_Diffuse[0] * diffuse + glosstex[0] * Color_Specular[0] * specular) * LightColor[0]);if (d[0] > 255) d[0] = 255;
2822                                 d[1] = (int)(buffer_texture_glowbgra8[x*4+1] * Color_Glow[1] + diffusetex[1] * Color_Ambient[1] + (diffusetex[1] * Color_Diffuse[1] * diffuse + glosstex[1] * Color_Specular[1] * specular) * LightColor[1]);if (d[1] > 255) d[1] = 255;
2823                                 d[2] = (int)(buffer_texture_glowbgra8[x*4+2] * Color_Glow[2] + diffusetex[2] * Color_Ambient[2] + (diffusetex[2] * Color_Diffuse[2] * diffuse + glosstex[2] * Color_Specular[2] * specular) * LightColor[2]);if (d[2] > 255) d[2] = 255;
2824                                 d[3] = (int)(                                                  diffusetex[3] * Color_Ambient[3]);if (d[3] > 255) d[3] = 255;
2825                         }
2826                         else
2827                         {
2828                                 d[0] = (int)(                                                  diffusetex[0] * Color_Ambient[0] + (diffusetex[0] * Color_Diffuse[0] * diffuse + glosstex[0] * Color_Specular[0] * specular) * LightColor[0]);if (d[0] > 255) d[0] = 255;
2829                                 d[1] = (int)(                                                  diffusetex[1] * Color_Ambient[1] + (diffusetex[1] * Color_Diffuse[1] * diffuse + glosstex[1] * Color_Specular[1] * specular) * LightColor[1]);if (d[1] > 255) d[1] = 255;
2830                                 d[2] = (int)(                                                  diffusetex[2] * Color_Ambient[2] + (diffusetex[2] * Color_Diffuse[2] * diffuse + glosstex[2] * Color_Specular[2] * specular) * LightColor[2]);if (d[2] > 255) d[2] = 255;
2831                                 d[3] = (int)(                                                  diffusetex[3] * Color_Ambient[3]);if (d[3] > 255) d[3] = 255;
2832                         }
2833                         buffer_FragColorbgra8[x*4+0] = d[0];
2834                         buffer_FragColorbgra8[x*4+1] = d[1];
2835                         buffer_FragColorbgra8[x*4+2] = d[2];
2836                         buffer_FragColorbgra8[x*4+3] = d[3];
2837                 }
2838         }
2839         else if (dpsoftrast.shader_permutation & SHADERPERMUTATION_DIFFUSE)
2840         {
2841                 Color_Diffuse[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+0];
2842                 Color_Diffuse[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+1];
2843                 Color_Diffuse[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+2];
2844                 Color_Diffuse[3] = 0.0f;
2845                 LightColor[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightColor*4+0];
2846                 LightColor[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightColor*4+1];
2847                 LightColor[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_LightColor*4+2];
2848                 LightColor[3] = 0.0f;
2849                 LightVectordata[0]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][0];
2850                 LightVectordata[1]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][1];
2851                 LightVectordata[2]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][2];
2852                 LightVectordata[3]  = span->data[0][DPSOFTRAST_ARRAY_TEXCOORD1][3];
2853                 LightVectorslope[0] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][0];
2854                 LightVectorslope[1] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][1];
2855                 LightVectorslope[2] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][2];
2856                 LightVectorslope[3] = span->data[1][DPSOFTRAST_ARRAY_TEXCOORD1][3];
2857                 DPSOFTRAST_Draw_Span_Texture2DVaryingBGRA8(span, buffer_texture_normalbgra8, GL20TU_NORMAL, DPSOFTRAST_ARRAY_TEXCOORD0, buffer_z);
2858                 for (x = startx;x < endx;x++)
2859                 {
2860                         z = buffer_z[x];
2861                         diffusetex[0] = buffer_texture_colorbgra8[x*4+0];
2862                         diffusetex[1] = buffer_texture_colorbgra8[x*4+1];
2863                         diffusetex[2] = buffer_texture_colorbgra8[x*4+2];
2864                         diffusetex[3] = buffer_texture_colorbgra8[x*4+3];
2865                         surfacenormal[0] = buffer_texture_normalbgra8[x*4+2] * (1.0f / 128.0f) - 1.0f;
2866                         surfacenormal[1] = buffer_texture_normalbgra8[x*4+1] * (1.0f / 128.0f) - 1.0f;
2867                         surfacenormal[2] = buffer_texture_normalbgra8[x*4+0] * (1.0f / 128.0f) - 1.0f;
2868                         DPSOFTRAST_Vector3Normalize(surfacenormal);
2869
2870                         lightnormal[0] = (LightVectordata[0] + LightVectorslope[0]*x) * z;
2871                         lightnormal[1] = (LightVectordata[1] + LightVectorslope[1]*x) * z;
2872                         lightnormal[2] = (LightVectordata[2] + LightVectorslope[2]*x) * z;
2873                         DPSOFTRAST_Vector3Normalize(lightnormal);
2874
2875                         diffuse = DPSOFTRAST_Vector3Dot(surfacenormal, lightnormal);if (diffuse < 0.0f) diffuse = 0.0f;
2876                         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_GLOW)
2877                         {
2878                                 d[0] = (int)(buffer_texture_glowbgra8[x*4+0] * Color_Glow[0] + diffusetex[0] * (Color_Ambient[0] + Color_Diffuse[0] * diffuse * LightColor[0]));if (d[0] > 255) d[0] = 255;
2879                                 d[1] = (int)(buffer_texture_glowbgra8[x*4+1] * Color_Glow[1] + diffusetex[1] * (Color_Ambient[1] + Color_Diffuse[1] * diffuse * LightColor[1]));if (d[1] > 255) d[1] = 255;
2880                                 d[2] = (int)(buffer_texture_glowbgra8[x*4+2] * Color_Glow[2] + diffusetex[2] * (Color_Ambient[2] + Color_Diffuse[2] * diffuse * LightColor[2]));if (d[2] > 255) d[2] = 255;
2881                                 d[3] = (int)(                                                  diffusetex[3] * (Color_Ambient[3]                                             ));if (d[3] > 255) d[3] = 255;
2882                         }
2883                         else
2884                         {
2885                                 d[0] = (int)(                                                + diffusetex[0] * (Color_Ambient[0] + Color_Diffuse[0] * diffuse * LightColor[0]));if (d[0] > 255) d[0] = 255;
2886                                 d[1] = (int)(                                                + diffusetex[1] * (Color_Ambient[1] + Color_Diffuse[1] * diffuse * LightColor[1]));if (d[1] > 255) d[1] = 255;
2887                                 d[2] = (int)(                                                + diffusetex[2] * (Color_Ambient[2] + Color_Diffuse[2] * diffuse * LightColor[2]));if (d[2] > 255) d[2] = 255;
2888                                 d[3] = (int)(                                                  diffusetex[3] * (Color_Ambient[3]                                             ));if (d[3] > 255) d[3] = 255;
2889                         }
2890                         buffer_FragColorbgra8[x*4+0] = d[0];
2891                         buffer_FragColorbgra8[x*4+1] = d[1];
2892                         buffer_FragColorbgra8[x*4+2] = d[2];
2893                         buffer_FragColorbgra8[x*4+3] = d[3];
2894                 }
2895         }
2896         else
2897         {
2898                 for (x = startx;x < endx;x++)
2899                 {
2900                         z = buffer_z[x];
2901                         diffusetex[0] = buffer_texture_colorbgra8[x*4+0];
2902                         diffusetex[1] = buffer_texture_colorbgra8[x*4+1];
2903                         diffusetex[2] = buffer_texture_colorbgra8[x*4+2];
2904                         diffusetex[3] = buffer_texture_colorbgra8[x*4+3];
2905
2906                         if (dpsoftrast.shader_permutation & SHADERPERMUTATION_GLOW)
2907                         {
2908                                 d[0] = (int)(buffer_texture_glowbgra8[x*4+0] * Color_Glow[0] + diffusetex[0] * Color_Ambient[0]);if (d[0] > 255) d[0] = 255;
2909                                 d[1] = (int)(buffer_texture_glowbgra8[x*4+1] * Color_Glow[1] + diffusetex[1] * Color_Ambient[1]);if (d[1] > 255) d[1] = 255;
2910                                 d[2] = (int)(buffer_texture_glowbgra8[x*4+2] * Color_Glow[2] + diffusetex[2] * Color_Ambient[2]);if (d[2] > 255) d[2] = 255;
2911                                 d[3] = (int)(                                                  diffusetex[3] * Color_Ambient[3]);if (d[3] > 255) d[3] = 255;
2912                         }
2913                         else
2914                         {
2915                                 d[0] = (int)(                                                  diffusetex[0] * Color_Ambient[0]);if (d[0] > 255) d[0] = 255;
2916                                 d[1] = (int)(                                                  diffusetex[1] * Color_Ambient[1]);if (d[1] > 255) d[1] = 255;
2917                                 d[2] = (int)(                                                  diffusetex[2] * Color_Ambient[2]);if (d[2] > 255) d[2] = 255;
2918                                 d[3] = (int)(                                                  diffusetex[3] * Color_Ambient[3]);if (d[3] > 255) d[3] = 255;
2919                         }
2920                         buffer_FragColorbgra8[x*4+0] = d[0];
2921                         buffer_FragColorbgra8[x*4+1] = d[1];
2922                         buffer_FragColorbgra8[x*4+2] = d[2];
2923                         buffer_FragColorbgra8[x*4+3] = d[3];
2924                 }
2925         }
2926         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2927 }
2928
2929
2930
2931 void DPSOFTRAST_VertexShader_LightSource(void)
2932 {
2933         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2934 }
2935
2936 void DPSOFTRAST_PixelShader_LightSource(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2937 {
2938         // TODO: IMPLEMENT
2939         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2940         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2941         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2942         memset(buffer_FragColorbgra8, 0, span->length*4);
2943         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2944 }
2945
2946
2947
2948 void DPSOFTRAST_VertexShader_Refraction(void)
2949 {
2950         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2951 }
2952
2953 void DPSOFTRAST_PixelShader_Refraction(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2954 {
2955         // TODO: IMPLEMENT
2956         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2957         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2958         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2959         memset(buffer_FragColorbgra8, 0, span->length*4);
2960         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2961 }
2962
2963
2964
2965 void DPSOFTRAST_VertexShader_Water(void)
2966 {
2967         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2968 }
2969
2970
2971 void DPSOFTRAST_PixelShader_Water(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2972 {
2973         // TODO: IMPLEMENT
2974         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2975         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2976         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2977         memset(buffer_FragColorbgra8, 0, span->length*4);
2978         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2979 }
2980
2981
2982
2983 void DPSOFTRAST_VertexShader_ShowDepth(void)
2984 {
2985         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
2986 }
2987
2988 void DPSOFTRAST_PixelShader_ShowDepth(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
2989 {
2990         // TODO: IMPLEMENT
2991         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
2992         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
2993         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
2994         memset(buffer_FragColorbgra8, 0, span->length*4);
2995         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
2996 }
2997
2998
2999
3000 void DPSOFTRAST_VertexShader_DeferredGeometry(void)
3001 {
3002         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
3003 }
3004
3005 void DPSOFTRAST_PixelShader_DeferredGeometry(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
3006 {
3007         // TODO: IMPLEMENT
3008         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
3009         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
3010         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
3011         memset(buffer_FragColorbgra8, 0, span->length*4);
3012         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
3013 }
3014
3015
3016
3017 void DPSOFTRAST_VertexShader_DeferredLightSource(void)
3018 {
3019         DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
3020 }
3021
3022 void DPSOFTRAST_PixelShader_DeferredLightSource(const DPSOFTRAST_State_Draw_Span * RESTRICT span)
3023 {
3024         // TODO: IMPLEMENT
3025         float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
3026         unsigned char buffer_FragColorbgra8[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
3027         DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
3028         memset(buffer_FragColorbgra8, 0, span->length*4);
3029         DPSOFTRAST_Draw_Span_FinishBGRA8(span, buffer_FragColorbgra8);
3030 }
3031
3032
3033
3034 typedef struct DPSOFTRAST_ShaderModeInfo_s
3035 {
3036         int lodarrayindex;
3037         void (*Vertex)(void);
3038         void (*Span)(const DPSOFTRAST_State_Draw_Span * RESTRICT span);
3039 }
3040 DPSOFTRAST_ShaderModeInfo;
3041
3042 DPSOFTRAST_ShaderModeInfo DPSOFTRAST_ShaderModeTable[SHADERMODE_COUNT] =
3043 {
3044         {2, DPSOFTRAST_VertexShader_Generic,                        DPSOFTRAST_PixelShader_Generic,                      },
3045         {2, DPSOFTRAST_VertexShader_PostProcess,                    DPSOFTRAST_PixelShader_PostProcess,                  },
3046         {2, DPSOFTRAST_VertexShader_Depth_Or_Shadow,                DPSOFTRAST_PixelShader_Depth_Or_Shadow,              },
3047         {2, DPSOFTRAST_VertexShader_FlatColor,                      DPSOFTRAST_PixelShader_FlatColor,                    },
3048         {2, DPSOFTRAST_VertexShader_VertexColor,                    DPSOFTRAST_PixelShader_VertexColor,                  },
3049         {2, DPSOFTRAST_VertexShader_Lightmap,                       DPSOFTRAST_PixelShader_Lightmap,                     },
3050         {2, DPSOFTRAST_VertexShader_FakeLight,                      DPSOFTRAST_PixelShader_FakeLight,                    },
3051         {2, DPSOFTRAST_VertexShader_LightDirectionMap_ModelSpace,   DPSOFTRAST_PixelShader_LightDirectionMap_ModelSpace, },
3052         {2, DPSOFTRAST_VertexShader_LightDirectionMap_TangentSpace, DPSOFTRAST_PixelShader_LightDirectionMap_TangentSpace},
3053         {2, DPSOFTRAST_VertexShader_LightDirection,                 DPSOFTRAST_PixelShader_LightDirection,               },
3054         {2, DPSOFTRAST_VertexShader_LightSource,                    DPSOFTRAST_PixelShader_LightSource,                  },
3055         {2, DPSOFTRAST_VertexShader_Refraction,                     DPSOFTRAST_PixelShader_Refraction,                   },
3056         {2, DPSOFTRAST_VertexShader_Water,                          DPSOFTRAST_PixelShader_Water,                        },
3057         {2, DPSOFTRAST_VertexShader_ShowDepth,                      DPSOFTRAST_PixelShader_ShowDepth,                    },
3058         {2, DPSOFTRAST_VertexShader_DeferredGeometry,               DPSOFTRAST_PixelShader_DeferredGeometry,             },
3059         {2, DPSOFTRAST_VertexShader_DeferredLightSource,            DPSOFTRAST_PixelShader_DeferredLightSource,          }
3060 };
3061
3062
3063
3064 void DPSOFTRAST_Draw_ProcessSpans(void)
3065 {
3066         int i;
3067         int x;
3068         int startx;
3069         int endx;
3070         int numspans = dpsoftrast.draw.numspans;
3071 //      unsigned int c;
3072 //      unsigned int *colorpixel;
3073         unsigned int *depthpixel;
3074         float w;
3075         float wslope;
3076         int depth;
3077         int depthslope;
3078         unsigned int d;
3079         DPSOFTRAST_State_Draw_Span *span = dpsoftrast.draw.spanqueue;
3080         unsigned char pixelmask[DPSOFTRAST_DRAW_MAXSPANLENGTH];
3081         for (i = 0;i < numspans;i++, span++)
3082         {
3083                 w = span->data[0][DPSOFTRAST_ARRAY_TOTAL][3];
3084                 wslope = span->data[1][DPSOFTRAST_ARRAY_TOTAL][3];
3085                 if (dpsoftrast.user.depthtest && dpsoftrast.fb_depthpixels)
3086                 {
3087                         depth = (int)(w*DPSOFTRAST_DEPTHSCALE);
3088                         depthslope = (int)(wslope*DPSOFTRAST_DEPTHSCALE);
3089                         depthpixel = dpsoftrast.fb_depthpixels + span->start;
3090                         switch(dpsoftrast.fb_depthfunc)
3091                         {
3092                         default:
3093                         case GL_ALWAYS:  for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = true; break;
3094                         case GL_LESS:    for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] < d; break;
3095                         case GL_LEQUAL:  for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] <= d; break;
3096                         case GL_EQUAL:   for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] == d; break;
3097                         case GL_GEQUAL:  for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] >= d; break;
3098                         case GL_GREATER: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] > d; break;
3099                         case GL_NEVER:   for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = false; break;
3100                         }
3101                         //colorpixel = dpsoftrast.fb_colorpixels[0] + span->start;
3102                         //for (x = 0;x < span->length;x++)
3103                         //      colorpixel[x] = (depthpixel[x] & 0xFF000000) ? (0x00FF0000) : (depthpixel[x] & 0x00FF0000);
3104                         // if there is no color buffer, skip pixel shader
3105                         startx = 0;
3106                         endx = span->length;
3107                         while (startx < endx && !pixelmask[startx])
3108                                 startx++;
3109                         while (endx > startx && !pixelmask[endx-1])
3110                                 endx--;
3111                         if (startx >= endx)
3112                                 continue; // no pixels to fill
3113                         span->pixelmask = pixelmask;
3114                         span->startx = startx;
3115                         span->endx = endx;
3116                         // run pixel shader if appropriate
3117                         // do this before running depthmask code, to allow the pixelshader
3118                         // to clear pixelmask values for alpha testing
3119                         if (dpsoftrast.fb_colorpixels[0] && dpsoftrast.fb_colormask)
3120                                 DPSOFTRAST_ShaderModeTable[dpsoftrast.shader_mode].Span(span);
3121                         if (dpsoftrast.user.depthmask)
3122                                 for (x = 0, d = depth;x < span->length;x++, d += depthslope)
3123                                         if (pixelmask[x])
3124                                                 depthpixel[x] = d;
3125                 }
3126                 else
3127                 {
3128                         // no depth testing means we're just dealing with color...
3129                         // if there is no color buffer, skip pixel shader
3130                         if (dpsoftrast.fb_colorpixels[0] && dpsoftrast.fb_colormask)
3131                         {
3132                                 memset(pixelmask, 1, span->length);
3133                                 span->pixelmask = pixelmask;
3134                                 span->startx = 0;
3135                                 span->endx = span->length;
3136                                 DPSOFTRAST_ShaderModeTable[dpsoftrast.shader_mode].Span(span);
3137                         }
3138                 }
3139         }
3140 }
3141
3142 void DPSOFTRAST_Draw_ProcessTriangles(int firstvertex, int numtriangles, const int *element3i, const unsigned short *element3s, unsigned char *arraymask)
3143 {
3144         int cullface = dpsoftrast.user.cullface;
3145         int width = dpsoftrast.fb_width;
3146         int height = dpsoftrast.fb_height;
3147         int i;
3148         int j;
3149         int k;
3150         int y;
3151         int e[3];
3152         int screenx[4];
3153         int screeny[4];
3154         int screenyless[4];
3155         int numpoints;
3156         int clipflags;
3157         int edge0p;
3158         int edge0n;
3159         int edge1p;
3160         int edge1n;
3161         int extent[6];
3162         int startx;
3163         int endx;
3164         float mip_edge0tc[2];
3165         float mip_edge1tc[2];
3166         float mip_edge0xy[2];
3167         float mip_edge1xy[2];
3168         float mip_edge0xymul;
3169         float mip_edge1xymul;
3170         float mip_edge0mip;
3171         float mip_edge1mip;
3172         float mipdensity;
3173         unsigned char mip[DPSOFTRAST_MAXTEXTUREUNITS];
3174         float startxf;
3175         float endxf;
3176         float edge0ylerp;
3177         float edge0yilerp;
3178         float edge1ylerp;
3179         float edge1yilerp;
3180         float edge0xf;
3181         float edge1xf;
3182         float spanilength;
3183         float startxlerp;
3184         float yc;
3185         float w;
3186         float frac;
3187         float ifrac;
3188         float trianglearea2;
3189         float triangleedge[2][4];
3190         float trianglenormal[4];
3191         float clipdist[4];
3192         float clipped[DPSOFTRAST_ARRAY_TOTAL][4][4];
3193         float screen[4][4];
3194         float proj[DPSOFTRAST_ARRAY_TOTAL][4][4];
3195         DPSOFTRAST_Texture *texture;
3196         DPSOFTRAST_State_Draw_Span *span;
3197         DPSOFTRAST_State_Draw_Span *oldspan;
3198         for (i = 0;i < numtriangles;i++)
3199         {
3200                 // generate the 3 edges of this triangle
3201                 // generate spans for the triangle - switch based on left split or right split classification of triangle
3202                 if (element3i)
3203                 {
3204                         e[0] = element3i[i*3+0] - firstvertex;
3205                         e[1] = element3i[i*3+1] - firstvertex;
3206                         e[2] = element3i[i*3+2] - firstvertex;
3207                 }
3208                 else if (element3s)
3209                 {
3210                         e[0] = element3s[i*3+0] - firstvertex;
3211                         e[1] = element3s[i*3+1] - firstvertex;
3212                         e[2] = element3s[i*3+2] - firstvertex;
3213                 }
3214                 else
3215                 {
3216                         e[0] = i*3+0;
3217                         e[1] = i*3+1;
3218                         e[2] = i*3+2;
3219                 }
3220                 triangleedge[0][0] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+0] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+0];
3221                 triangleedge[0][1] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+1] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+1];
3222                 triangleedge[0][2] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+2] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+2];
3223                 triangleedge[1][0] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+0] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+0];
3224                 triangleedge[1][1] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+1] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+1];
3225                 triangleedge[1][2] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+2] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+2];
3226                 trianglenormal[0] = triangleedge[0][1] * triangleedge[1][2] - triangleedge[0][2] * triangleedge[1][1];
3227                 trianglenormal[1] = triangleedge[0][2] * triangleedge[1][0] - triangleedge[0][0] * triangleedge[1][2];
3228                 trianglenormal[2] = triangleedge[0][0] * triangleedge[1][1] - triangleedge[0][1] * triangleedge[1][0];
3229                 trianglearea2 = trianglenormal[0] * trianglenormal[0] + trianglenormal[1] * trianglenormal[1] + trianglenormal[2] * trianglenormal[2];
3230                 // skip degenerate triangles, nothing good can come from them...
3231                 if (trianglearea2 == 0.0f)
3232                         continue;
3233                 // apply current cullface mode (this culls many triangles)
3234                 switch(cullface)
3235                 {
3236                 case GL_BACK:
3237                         if (trianglenormal[2] < 0)
3238                                 continue;
3239                         break;
3240                 case GL_FRONT:
3241                         if (trianglenormal[2] > 0)
3242                                 continue;
3243                         break;
3244                 }
3245                 // calculate distance from nearplane
3246                 clipdist[0] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+2] + 1.0f;
3247                 clipdist[1] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+2] + 1.0f;
3248                 clipdist[2] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+2] + 1.0f;
3249                 clipflags = 0;
3250                 if (clipdist[0] < 0.0f)
3251                         clipflags |= 1;
3252                 if (clipdist[1] < 0.0f)
3253                         clipflags |= 2;
3254                 if (clipdist[2] < 0.0f)
3255                         clipflags |= 4;
3256                 // clip triangle if necessary
3257                 switch(clipflags)
3258                 {
3259                 case 0: /*000*/
3260                         // triangle is entirely in front of nearplane
3261
3262                         // macros for clipping vertices
3263 #define CLIPPEDVERTEXLERP(k,p1,p2) \
3264                         frac = clipdist[p1] / (clipdist[p1] - clipdist[p2]);\
3265                         ifrac = 1.0f - frac;\
3266                         for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)\
3267                         {\
3268                                 /*if (arraymask[j])*/\
3269                                 {\
3270                                         clipped[j][k][0] = dpsoftrast.draw.post_array4f[j][e[p1]*4+0]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+0]*frac;\
3271                                         clipped[j][k][1] = dpsoftrast.draw.post_array4f[j][e[p1]*4+1]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+1]*frac;\
3272                                         clipped[j][k][2] = dpsoftrast.draw.post_array4f[j][e[p1]*4+2]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+2]*frac;\
3273                                         clipped[j][k][3] = dpsoftrast.draw.post_array4f[j][e[p1]*4+3]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+3]*frac;\
3274                                 }\
3275                         }\
3276                         DPSOFTRAST_Draw_ProjectVertices(screen[k], clipped[DPSOFTRAST_ARRAY_POSITION][k], 1)
3277 #define CLIPPEDVERTEXCOPY(k,p1) \
3278                         for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)\
3279                         {\
3280                                 /*if (arraymask[j])*/\
3281                                 {\
3282                                         clipped[j][k][0] = dpsoftrast.draw.post_array4f[j][e[p1]*4+0];\
3283                                         clipped[j][k][1] = dpsoftrast.draw.post_array4f[j][e[p1]*4+1];\
3284                                         clipped[j][k][2] = dpsoftrast.draw.post_array4f[j][e[p1]*4+2];\
3285                                         clipped[j][k][3] = dpsoftrast.draw.post_array4f[j][e[p1]*4+3];\
3286                                 }\
3287                         }\
3288                         screen[k][0] = dpsoftrast.draw.screencoord4f[e[p1]*4+0];\
3289                         screen[k][1] = dpsoftrast.draw.screencoord4f[e[p1]*4+1];\
3290                         screen[k][2] = dpsoftrast.draw.screencoord4f[e[p1]*4+2];\
3291                         screen[k][3] = dpsoftrast.draw.screencoord4f[e[p1]*4+3];
3292
3293                         CLIPPEDVERTEXCOPY(0,0);
3294                         CLIPPEDVERTEXCOPY(1,1);
3295                         CLIPPEDVERTEXCOPY(2,2);
3296                         numpoints = 3;
3297                         break;
3298                 case 1: /*100*/
3299                         CLIPPEDVERTEXLERP(0,0,1);
3300                         CLIPPEDVERTEXCOPY(1,1);
3301                         CLIPPEDVERTEXCOPY(2,2);
3302                         CLIPPEDVERTEXLERP(3,2,0);
3303                         numpoints = 4;
3304                         break;
3305                 case 2: /*010*/
3306                         CLIPPEDVERTEXCOPY(0,0);
3307                         CLIPPEDVERTEXLERP(1,0,1);
3308                         CLIPPEDVERTEXLERP(2,1,2);
3309                         CLIPPEDVERTEXCOPY(3,2);
3310                         numpoints = 4;
3311                         break;
3312                 case 3: /*110*/
3313                         CLIPPEDVERTEXLERP(0,1,2);
3314                         CLIPPEDVERTEXCOPY(1,2);
3315                         CLIPPEDVERTEXLERP(2,2,0);
3316                         numpoints = 3;
3317                         break;
3318                 case 4: /*001*/
3319                         CLIPPEDVERTEXCOPY(0,0);
3320                         CLIPPEDVERTEXCOPY(1,1);
3321                         CLIPPEDVERTEXLERP(2,1,2);
3322                         CLIPPEDVERTEXLERP(3,2,0);
3323                         numpoints = 4;
3324                         break;
3325                 case 5: /*101*/
3326                         CLIPPEDVERTEXLERP(0,0,1);
3327                         CLIPPEDVERTEXCOPY(1,1);
3328                         CLIPPEDVERTEXLERP(2,1,2);
3329                         numpoints = 3;
3330                         break;
3331                 case 6: /*011*/
3332                         CLIPPEDVERTEXCOPY(0,0);
3333                         CLIPPEDVERTEXLERP(1,0,1);
3334                         CLIPPEDVERTEXLERP(2,2,0);
3335                         numpoints = 3;
3336                         break;
3337                 case 7: /*111*/
3338                         // triangle is entirely behind nearplane
3339                         continue;
3340                 }
3341                 // calculate integer y coords for triangle points
3342                 screenx[0] = (int)(screen[0][0]);
3343                 screeny[0] = (int)(screen[0][1]);
3344                 screenx[1] = (int)(screen[1][0]);
3345                 screeny[1] = (int)(screen[1][1]);
3346                 screenx[2] = (int)(screen[2][0]);
3347                 screeny[2] = (int)(screen[2][1]);
3348                 screenx[3] = (int)(screen[3][0]);
3349                 screeny[3] = (int)(screen[3][1]);
3350                 // figure out the extents (bounding box) of the triangle
3351                 extent[0] = screenx[0];
3352                 extent[1] = screeny[0];
3353                 extent[2] = screenx[0];
3354                 extent[3] = screeny[0];
3355                 for (j = 1;j < numpoints;j++)
3356                 {
3357                         if (extent[0] > screenx[j]) extent[0] = screenx[j];
3358                         if (extent[1] > screeny[j]) extent[1] = screeny[j];
3359                         if (extent[2] < screenx[j]) extent[2] = screenx[j];
3360                         if (extent[3] < screeny[j]) extent[3] = screeny[j];
3361                 }
3362                 //extent[0]--;
3363                 //extent[1]--;
3364                 extent[2]++;
3365                 extent[3]++;
3366                 if (extent[0] < 0)
3367                         extent[0] = 0;
3368                 if (extent[1] < 0)
3369                         extent[1] = 0;
3370                 if (extent[2] > width)
3371                         extent[2] = width;
3372                 if (extent[3] > height)
3373                         extent[3] = height;
3374                 // skip offscreen triangles
3375                 if (extent[2] <= extent[0] || extent[3] <= extent[1])
3376                         continue;
3377                 // okay, this triangle is going to produce spans, we'd better project
3378                 // the interpolants now (this is what gives perspective texturing),
3379                 // this consists of simply multiplying all arrays by the W coord
3380                 // (which is basically 1/Z), which will be undone per-pixel
3381                 // (multiplying by Z again) to get the perspective-correct array
3382                 // values
3383                 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
3384                 {
3385                         //if (arraymask[j])
3386                         {
3387                                 for (k = 0;k < numpoints;k++)
3388                                 {
3389                                         w = screen[k][3];
3390                                         proj[j][k][0] = clipped[j][k][0] * w;
3391                                         proj[j][k][1] = clipped[j][k][1] * w;
3392                                         proj[j][k][2] = clipped[j][k][2] * w;
3393                                         proj[j][k][3] = clipped[j][k][3] * w;
3394                                 }
3395                         }
3396                 }
3397                 // adjust texture LOD by texture density, in the simplest way possible...
3398                 mip_edge0xy[0] = screen[0][0] - screen[1][0];
3399                 mip_edge0xy[1] = screen[0][1] - screen[1][1];
3400                 mip_edge1xy[0] = screen[2][0] - screen[1][0];
3401                 mip_edge1xy[1] = screen[2][1] - screen[1][1];
3402                 mip_edge0xymul = 1.0f / (mip_edge0xy[0]*mip_edge0xy[0]+mip_edge0xy[1]*mip_edge0xy[1]);
3403                 mip_edge1xymul = 1.0f / (mip_edge1xy[0]*mip_edge1xy[0]+mip_edge1xy[1]*mip_edge1xy[1]);
3404                 for (j = 0;j < DPSOFTRAST_MAXTEXTUREUNITS;j++)
3405                 {
3406                         texture = dpsoftrast.texbound[j];
3407                         if (texture)
3408                         {
3409                                 if (texture->filter <= DPSOFTRAST_TEXTURE_FILTER_LINEAR)
3410                                 {
3411                                         mip[j] = 0;
3412                                         continue;
3413                                 }
3414                                 k = DPSOFTRAST_ShaderModeTable[dpsoftrast.shader_mode].lodarrayindex;
3415                                 mip_edge0tc[0] = (clipped[k][0][0] - clipped[k][1][0]) * texture->mipmap[0][2];
3416                                 mip_edge0tc[1] = (clipped[k][0][1] - clipped[k][1][1]) * texture->mipmap[0][3];
3417                                 mip_edge1tc[0] = (clipped[k][2][0] - clipped[k][1][0]) * texture->mipmap[0][2];
3418                                 mip_edge1tc[1] = (clipped[k][2][1] - clipped[k][1][1]) * texture->mipmap[0][3];
3419                                 mip_edge0mip = (mip_edge0tc[0]*mip_edge0tc[0]+mip_edge0tc[1]*mip_edge0tc[1]) * mip_edge0xymul;
3420                                 mip_edge1mip = (mip_edge1tc[0]*mip_edge1tc[0]+mip_edge1tc[1]*mip_edge1tc[1]) * mip_edge1xymul;
3421                                 // this will be multiplied in the texturing routine by the texture resolution
3422                                 mipdensity = mip_edge0mip < mip_edge1mip ? mip_edge0mip : mip_edge1mip;
3423                                 y = (int)(log(mipdensity)/log(2.0f));
3424                                 if (y < 0)
3425                                         y = 0;
3426                                 if (y > texture->mipmaps - 1)
3427                                         y = texture->mipmaps - 1;
3428                                 mip[j] = y;
3429                         }
3430                 }
3431                 // iterate potential spans
3432                 // TODO: optimize?  if we figured out the edge order beforehand, this
3433                 //       could do loops over the edges in the proper order rather than
3434                 //       selecting them for each span
3435                 // TODO: optimize?  the edges could have data slopes calculated
3436                 // TODO: optimize?  the data slopes could be calculated as a plane
3437                 //       (2D slopes) to avoid any interpolation along edges at all
3438                 for (y = extent[1];y < extent[3];y++)
3439                 {
3440                         // get center of pixel y
3441                         yc = y;
3442                         // do the compares all at once
3443                         screenyless[0] = y <= screeny[0];
3444                         screenyless[1] = y <= screeny[1];
3445                         screenyless[2] = y <= screeny[2];
3446                         screenyless[3] = y <= screeny[3];
3447                         if (numpoints == 4)
3448                         {
3449                                 switch(screenyless[0] + screenyless[1] * 2 + screenyless[2] * 4 + screenyless[3] * 8)
3450                                 {
3451                                 case  0: /*0000*/ continue;
3452                                 case  1: /*1000*/ edge0p = 3;edge0n = 0;edge1p = 0;edge1n = 1;break;
3453                                 case  2: /*0100*/ edge0p = 0;edge0n = 1;edge1p = 1;edge1n = 2;break;
3454                                 case  3: /*1100*/ edge0p = 3;edge0n = 0;edge1p = 1;edge1n = 2;break;
3455                                 case  4: /*0010*/ edge0p = 1;edge0n = 2;edge1p = 2;edge1n = 3;break;
3456                                 case  5: /*1010*/ edge0p = 1;edge0n = 2;edge1p = 2;edge1n = 3;break; // concave - nonsense
3457                                 case  6: /*0110*/ edge0p = 0;edge0n = 1;edge1p = 2;edge1n = 3;break;
3458                                 case  7: /*1110*/ edge0p = 3;edge0n = 0;edge1p = 2;edge1n = 3;break;
3459                                 case  8: /*0001*/ edge0p = 2;edge0n = 3;edge1p = 3;edge1n = 0;break;
3460                                 case  9: /*1001*/ edge0p = 2;edge0n = 3;edge1p = 0;edge1n = 1;break;
3461                                 case 10: /*0101*/ edge0p = 2;edge0n = 3;edge1p = 1;edge1n = 2;break; // concave - nonsense
3462                                 case 11: /*1101*/ edge0p = 2;edge0n = 3;edge1p = 1;edge1n = 2;break;
3463                                 case 12: /*0011*/ edge0p = 1;edge0n = 2;edge1p = 3;edge1n = 0;break;
3464                                 case 13: /*1011*/ edge0p = 1;edge0n = 2;edge1p = 0;edge1n = 1;break;
3465                                 case 14: /*0111*/ edge0p = 0;edge0n = 1;edge1p = 3;edge1n = 0;break;
3466                                 case 15: /*1111*/ continue;
3467                                 }
3468                         }
3469                         else
3470                         {
3471                                 switch(screenyless[0] + screenyless[1] * 2 + screenyless[2] * 4)
3472                                 {
3473                                 case 0: /*000*/ continue;
3474                                 case 1: /*100*/ edge0p = 2;edge0n = 0;edge1p = 0;edge1n = 1;break;
3475                                 case 2: /*010*/ edge0p = 0;edge0n = 1;edge1p = 1;edge1n = 2;break;
3476                                 case 3: /*110*/ edge0p = 2;edge0n = 0;edge1p = 1;edge1n = 2;break;
3477                                 case 4: /*001*/ edge0p = 1;edge0n = 2;edge1p = 2;edge1n = 0;break;
3478                                 case 5: /*101*/ edge0p = 1;edge0n = 2;edge1p = 0;edge1n = 1;break;
3479                                 case 6: /*011*/ edge0p = 0;edge0n = 1;edge1p = 2;edge1n = 0;break;
3480                                 case 7: /*111*/ continue;
3481                                 }
3482                         }
3483 #if 0
3484                 {
3485                         int foundedges = 0;
3486                         int cedge0p = 0;
3487                         int cedge0n = 0;
3488                         int cedge1p = 0;
3489                         int cedge1n = 0;
3490                         for (j = 0, k = numpoints-1;j < numpoints;k = j, j++)
3491                         {
3492                                 if (screenyless[k] && !screenyless[j])
3493                                 {
3494                                         cedge1p = k;
3495                                         cedge1n = j;
3496                                         foundedges |= 1;
3497                                 }
3498                                 else if (screenyless[j] && !screenyless[k])
3499                                 {
3500                                         cedge0p = k;
3501                                         cedge0n = j;
3502                                         foundedges |= 2;
3503                                 }
3504                         }
3505                         if (foundedges != 3)
3506                                 continue;
3507                         if (cedge0p != edge0p || cedge0n != edge0n || cedge1p != edge1p || cedge1n != edge1n)
3508                         {
3509                                 if (numpoints == 4)
3510                                         printf("case %i%i%i%i is broken %i %i %i %i != %i %i %i %i\n", screenyless[0], screenyless[1], screenyless[2], screenyless[3], cedge0p, cedge0n, cedge1p, cedge1n, edge0p, edge0n, edge1p, edge1n);
3511                                 else
3512                                         printf("case %i%i%i is broken %i %i %i %i != %i %i %i %i\n", screenyless[0], screenyless[1], screenyless[2], cedge0p, cedge0n, cedge1p, cedge1n, edge0p, edge0n, edge1p, edge1n);
3513                         }
3514                 }
3515 #endif
3516                         edge0ylerp = (yc - screen[edge0p][1]) / (screen[edge0n][1] - screen[edge0p][1]);
3517                         edge1ylerp = (yc - screen[edge1p][1]) / (screen[edge1n][1] - screen[edge1p][1]);
3518                         if (edge0ylerp < 0 || edge0ylerp > 1 || edge1ylerp < 0 || edge1ylerp > 1)
3519                                 continue;
3520                         edge0yilerp = 1.0f - edge0ylerp;
3521                         edge1yilerp = 1.0f - edge1ylerp;
3522                         edge0xf = screen[edge0p][0] * edge0yilerp + screen[edge0n][0] * edge0ylerp;
3523                         edge1xf = screen[edge1p][0] * edge1yilerp + screen[edge1n][0] * edge1ylerp;
3524                         if (edge0xf < edge1xf)
3525                         {
3526                                 startxf = edge0xf;
3527                                 endxf = edge1xf;
3528                         }
3529                         else
3530                         {
3531                                 startxf = edge1xf;
3532                                 endxf = edge0xf;
3533                         }
3534                         startx = (int)ceil(startxf);
3535                         endx = (int)ceil(endxf);
3536                         if (startx < 0)
3537                                 startx = 0;
3538                         if (endx > width)
3539                                 endx = width;
3540                         if (startx >= endx)
3541                                 continue;
3542                         if (startxf > startx || endxf < endx-1) { printf("%s:%i X wrong (%i to %i is outside %f to %f)\n", __FILE__, __LINE__, startx, endx, startxf, endxf); }
3543                         spanilength = 1.0f / (endxf - startxf);
3544                         startxlerp = startx - startxf;
3545                         span = &dpsoftrast.draw.spanqueue[dpsoftrast.draw.numspans++];
3546                         memcpy(span->mip, mip, sizeof(span->mip));
3547                         span->start = y * width + startx;
3548                         span->length = endx - startx;
3549                         j = DPSOFTRAST_ARRAY_TOTAL;
3550                         if (edge0xf < edge1xf)
3551                         {
3552                                 span->data[0][j][0] = screen[edge0p][0] * edge0yilerp + screen[edge0n][0] * edge0ylerp;
3553                                 span->data[0][j][1] = screen[edge0p][1] * edge0yilerp + screen[edge0n][1] * edge0ylerp;
3554                                 span->data[0][j][2] = screen[edge0p][2] * edge0yilerp + screen[edge0n][2] * edge0ylerp;
3555                                 span->data[0][j][3] = screen[edge0p][3] * edge0yilerp + screen[edge0n][3] * edge0ylerp;
3556                                 span->data[1][j][0] = screen[edge1p][0] * edge1yilerp + screen[edge1n][0] * edge1ylerp;
3557                                 span->data[1][j][1] = screen[edge1p][1] * edge1yilerp + screen[edge1n][1] * edge1ylerp;
3558                                 span->data[1][j][2] = screen[edge1p][2] * edge1yilerp + screen[edge1n][2] * edge1ylerp;
3559                                 span->data[1][j][3] = screen[edge1p][3] * edge1yilerp + screen[edge1n][3] * edge1ylerp;
3560                                 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
3561                                 {
3562                                         //if (arraymask[j])
3563                                         {
3564                                                 span->data[0][j][0] = proj[j][edge0p][0] * edge0yilerp + proj[j][edge0n][0] * edge0ylerp;
3565                                                 span->data[0][j][1] = proj[j][edge0p][1] * edge0yilerp + proj[j][edge0n][1] * edge0ylerp;
3566                                                 span->data[0][j][2] = proj[j][edge0p][2] * edge0yilerp + proj[j][edge0n][2] * edge0ylerp;
3567                                                 span->data[0][j][3] = proj[j][edge0p][3] * edge0yilerp + proj[j][edge0n][3] * edge0ylerp;
3568                                                 span->data[1][j][0] = proj[j][edge1p][0] * edge1yilerp + proj[j][edge1n][0] * edge1ylerp;
3569                                                 span->data[1][j][1] = proj[j][edge1p][1] * edge1yilerp + proj[j][edge1n][1] * edge1ylerp;
3570                                                 span->data[1][j][2] = proj[j][edge1p][2] * edge1yilerp + proj[j][edge1n][2] * edge1ylerp;
3571                                                 span->data[1][j][3] = proj[j][edge1p][3] * edge1yilerp + proj[j][edge1n][3] * edge1ylerp;
3572                                         }
3573                                 }
3574                         }
3575                         else
3576                         {
3577                                 span->data[0][j][0] = screen[edge1p][0] * edge1yilerp + screen[edge1n][0] * edge1ylerp;
3578                                 span->data[0][j][1] = screen[edge1p][1] * edge1yilerp + screen[edge1n][1] * edge1ylerp;
3579                                 span->data[0][j][2] = screen[edge1p][2] * edge1yilerp + screen[edge1n][2] * edge1ylerp;
3580                                 span->data[0][j][3] = screen[edge1p][3] * edge1yilerp + screen[edge1n][3] * edge1ylerp;
3581                                 span->data[1][j][0] = screen[edge0p][0] * edge0yilerp + screen[edge0n][0] * edge0ylerp;
3582                                 span->data[1][j][1] = screen[edge0p][1] * edge0yilerp + screen[edge0n][1] * edge0ylerp;
3583                                 span->data[1][j][2] = screen[edge0p][2] * edge0yilerp + screen[edge0n][2] * edge0ylerp;
3584                                 span->data[1][j][3] = screen[edge0p][3] * edge0yilerp + screen[edge0n][3] * edge0ylerp;
3585                                 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
3586                                 {
3587                                         //if (arraymask[j])
3588                                         {
3589                                                 span->data[0][j][0] = proj[j][edge1p][0] * edge1yilerp + proj[j][edge1n][0] * edge1ylerp;
3590                                                 span->data[0][j][1] = proj[j][edge1p][1] * edge1yilerp + proj[j][edge1n][1] * edge1ylerp;
3591                                                 span->data[0][j][2] = proj[j][edge1p][2] * edge1yilerp + proj[j][edge1n][2] * edge1ylerp;
3592                                                 span->data[0][j][3] = proj[j][edge1p][3] * edge1yilerp + proj[j][edge1n][3] * edge1ylerp;
3593                                                 span->data[1][j][0] = proj[j][edge0p][0] * edge0yilerp + proj[j][edge0n][0] * edge0ylerp;
3594                                                 span->data[1][j][1] = proj[j][edge0p][1] * edge0yilerp + proj[j][edge0n][1] * edge0ylerp;
3595                                                 span->data[1][j][2] = proj[j][edge0p][2] * edge0yilerp + proj[j][edge0n][2] * edge0ylerp;
3596                                                 span->data[1][j][3] = proj[j][edge0p][3] * edge0yilerp + proj[j][edge0n][3] * edge0ylerp;
3597                                         }
3598                                 }
3599                         }
3600                         // change data[1][n][] to be a data slope
3601                         j = DPSOFTRAST_ARRAY_TOTAL;
3602                         span->data[1][j][0] = (span->data[1][j][0] - span->data[0][j][0]) * spanilength;
3603                         span->data[1][j][1] = (span->data[1][j][1] - span->data[0][j][1]) * spanilength;
3604                         span->data[1][j][2] = (span->data[1][j][2] - span->data[0][j][2]) * spanilength;
3605                         span->data[1][j][3] = (span->data[1][j][3] - span->data[0][j][3]) * spanilength;
3606                         for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
3607                         {
3608                                 //if (arraymask[j])
3609                                 {
3610                                         span->data[1][j][0] = (span->data[1][j][0] - span->data[0][j][0]) * spanilength;
3611                                         span->data[1][j][1] = (span->data[1][j][1] - span->data[0][j][1]) * spanilength;
3612                                         span->data[1][j][2] = (span->data[1][j][2] - span->data[0][j][2]) * spanilength;
3613                                         span->data[1][j][3] = (span->data[1][j][3] - span->data[0][j][3]) * spanilength;
3614                                 }
3615                         }
3616                         // adjust the data[0][n][] to be correct for the pixel centers
3617                         // this also handles horizontal clipping where a major part of the
3618                         // span may be off the left side of the screen
3619                         j = DPSOFTRAST_ARRAY_TOTAL;
3620                         span->data[0][j][0] += span->data[1][j][0] * startxlerp;
3621                         span->data[0][j][1] += span->data[1][j][1] * startxlerp;
3622                         span->data[0][j][2] += span->data[1][j][2] * startxlerp;
3623                         span->data[0][j][3] += span->data[1][j][3] * startxlerp;
3624                         for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
3625                         {
3626                                 //if (arraymask[j])
3627                                 {
3628                                         span->data[0][j][0] += span->data[1][j][0] * startxlerp;
3629                                         span->data[0][j][1] += span->data[1][j][1] * startxlerp;
3630                                         span->data[0][j][2] += span->data[1][j][2] * startxlerp;
3631                                         span->data[0][j][3] += span->data[1][j][3] * startxlerp;
3632                                 }
3633                         }
3634                         // to keep the shader routines from needing more than a small
3635                         // buffer for pixel intermediate data, we split long spans...
3636                         while (span->length > DPSOFTRAST_DRAW_MAXSPANLENGTH)
3637                         {
3638                                 span->length = DPSOFTRAST_DRAW_MAXSPANLENGTH;
3639                                 if (dpsoftrast.draw.numspans >= DPSOFTRAST_DRAW_MAXSPANQUEUE)
3640                                 {
3641                                         DPSOFTRAST_Draw_ProcessSpans();
3642                                         dpsoftrast.draw.numspans = 0;
3643                                 }
3644                                 oldspan = span;
3645                                 span = &dpsoftrast.draw.spanqueue[dpsoftrast.draw.numspans++];
3646                                 *span = *oldspan;
3647                                 startx += DPSOFTRAST_DRAW_MAXSPANLENGTH;
3648                                 span->start = y * width + startx;
3649                                 span->length = endx - startx;
3650                                 j = DPSOFTRAST_ARRAY_TOTAL;
3651                                 span->data[0][j][0] += span->data[1][j][0] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3652                                 span->data[0][j][1] += span->data[1][j][1] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3653                                 span->data[0][j][2] += span->data[1][j][2] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3654                                 span->data[0][j][3] += span->data[1][j][3] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3655                                 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
3656                                 {
3657                                         //if (arraymask[j])
3658                                         {
3659                                                 span->data[0][j][0] += span->data[1][j][0] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3660                                                 span->data[0][j][1] += span->data[1][j][1] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3661                                                 span->data[0][j][2] += span->data[1][j][2] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3662                                                 span->data[0][j][3] += span->data[1][j][3] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
3663                                         }
3664                                 }
3665                         }
3666                         // after all that, we have a span suitable for the pixel shader...
3667                         if (dpsoftrast.draw.numspans >= DPSOFTRAST_DRAW_MAXSPANQUEUE)
3668                         {
3669                                 DPSOFTRAST_Draw_ProcessSpans();
3670                                 dpsoftrast.draw.numspans = 0;
3671                         }
3672                 }
3673                 // draw outlines over triangle for debugging
3674         //      for (j = 0, k = numpoints-1;j < numpoints;k = j, j++)
3675         //              DPSOFTRAST_Draw_DebugEdgePoints(screen[k], screen[j]);
3676         }
3677         if (dpsoftrast.draw.numspans)
3678         {
3679                 DPSOFTRAST_Draw_ProcessSpans();
3680                 dpsoftrast.draw.numspans = 0;
3681         }
3682 }
3683
3684 void DPSOFTRAST_Draw_DebugPoints(void)
3685 {
3686         int i;
3687         int x;
3688         int y;
3689         int numvertices = dpsoftrast.draw.numvertices;
3690         int w = dpsoftrast.fb_width;
3691         int bounds[4];
3692         unsigned int *pixels = dpsoftrast.fb_colorpixels[0];
3693         const float *c4f;
3694         bounds[0] = dpsoftrast.fb_viewportscissor[0];
3695         bounds[1] = dpsoftrast.fb_viewportscissor[1];
3696         bounds[2] = dpsoftrast.fb_viewportscissor[0] + dpsoftrast.fb_viewportscissor[2];
3697         bounds[3] = dpsoftrast.fb_viewportscissor[1] + dpsoftrast.fb_viewportscissor[3];
3698         for (i = 0;i < numvertices;i++)
3699         {
3700                 // check nearclip
3701                 //if (dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+3] != 1.0f)
3702                 //      continue;
3703                 x = (int)(dpsoftrast.draw.screencoord4f[i*4+0]);
3704                 y = (int)(dpsoftrast.draw.screencoord4f[i*4+1]);
3705                 //x = (int)(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+0] + 0.5f);
3706                 //y = (int)(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+1] + 0.5f);
3707                 //x = (int)((dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+0] + 1.0f) * dpsoftrast.fb_width * 0.5f + 0.5f);
3708                 //y = (int)((dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+1] + 1.0f) * dpsoftrast.fb_height * 0.5f + 0.5f);
3709                 if (x < bounds[0] || y < bounds[1] || x >= bounds[2] || y >= bounds[3])
3710                         continue;
3711                 c4f = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR] + i*4;
3712                 pixels[y*w+x] = DPSOFTRAST_BGRA8_FROM_RGBA32F(c4f[0], c4f[1], c4f[2], c4f[3]);
3713         }
3714 }
3715
3716 void DPSOFTRAST_DrawTriangles(int firstvertex, int numvertices, int numtriangles, const int *element3i, const unsigned short *element3s)
3717 {
3718         unsigned char arraymask[DPSOFTRAST_ARRAY_TOTAL];
3719         arraymask[0] = true;
3720         arraymask[1] = dpsoftrast.fb_colorpixels[0] != NULL; // TODO: optimize (decide based on shadermode)
3721         arraymask[2] = dpsoftrast.pointer_texcoordf[0] != NULL;
3722         arraymask[3] = dpsoftrast.pointer_texcoordf[1] != NULL;
3723         arraymask[4] = dpsoftrast.pointer_texcoordf[2] != NULL;
3724         arraymask[5] = dpsoftrast.pointer_texcoordf[3] != NULL;
3725         arraymask[6] = dpsoftrast.pointer_texcoordf[4] != NULL;
3726         arraymask[7] = dpsoftrast.pointer_texcoordf[5] != NULL;
3727         arraymask[8] = dpsoftrast.pointer_texcoordf[6] != NULL;
3728         arraymask[9] = dpsoftrast.pointer_texcoordf[7] != NULL;
3729         DPSOFTRAST_Validate(DPSOFTRAST_VALIDATE_DRAW);
3730         DPSOFTRAST_Draw_LoadVertices(firstvertex, numvertices, true);
3731         DPSOFTRAST_ShaderModeTable[dpsoftrast.shader_mode].Vertex();
3732         DPSOFTRAST_Draw_ProjectVertices(dpsoftrast.draw.screencoord4f, dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], numvertices);
3733         DPSOFTRAST_Draw_ProcessTriangles(firstvertex, numtriangles, element3i, element3s, arraymask);
3734 }
3735
3736 void DPSOFTRAST_Init(int width, int height, unsigned int *colorpixels, unsigned int *depthpixels)
3737 {
3738         union
3739         {
3740                 int i;
3741                 unsigned char b[4];
3742         }
3743         u;
3744         u.i = 1;
3745         memset(&dpsoftrast, 0, sizeof(dpsoftrast));
3746         dpsoftrast.bigendian = u.b[3];
3747         dpsoftrast.fb_width = width;
3748         dpsoftrast.fb_height = height;
3749         dpsoftrast.fb_depthpixels = depthpixels;
3750         dpsoftrast.fb_colorpixels[0] = colorpixels;
3751         dpsoftrast.fb_colorpixels[1] = NULL;
3752         dpsoftrast.fb_colorpixels[1] = NULL;
3753         dpsoftrast.fb_colorpixels[1] = NULL;
3754         dpsoftrast.texture_firstfree = 1;
3755         dpsoftrast.texture_end = 1;
3756         dpsoftrast.texture_max = 0;
3757         dpsoftrast.user.colormask[0] = 1;
3758         dpsoftrast.user.colormask[1] = 1;
3759         dpsoftrast.user.colormask[2] = 1;
3760         dpsoftrast.user.colormask[3] = 1;
3761         dpsoftrast.user.blendfunc[0] = GL_ONE;
3762         dpsoftrast.user.blendfunc[1] = GL_ZERO;
3763         dpsoftrast.user.depthmask = true;
3764         dpsoftrast.user.depthtest = true;
3765         dpsoftrast.user.depthfunc = GL_LEQUAL;
3766         dpsoftrast.user.scissortest = false;
3767         dpsoftrast.user.cullface = GL_BACK;
3768         dpsoftrast.user.alphatest = false;
3769         dpsoftrast.user.alphafunc = GL_GREATER;
3770         dpsoftrast.user.alphavalue = 0.5f;
3771         dpsoftrast.user.scissor[0] = 0;
3772         dpsoftrast.user.scissor[1] = 0;
3773         dpsoftrast.user.scissor[2] = dpsoftrast.fb_width;
3774         dpsoftrast.user.scissor[3] = dpsoftrast.fb_height;
3775         dpsoftrast.user.viewport[0] = 0;
3776         dpsoftrast.user.viewport[1] = 0;
3777         dpsoftrast.user.viewport[2] = dpsoftrast.fb_width;
3778         dpsoftrast.user.viewport[3] = dpsoftrast.fb_height;
3779         dpsoftrast.user.depthrange[0] = 0;
3780         dpsoftrast.user.depthrange[1] = 1;
3781         dpsoftrast.user.polygonoffset[0] = 0;
3782         dpsoftrast.user.polygonoffset[1] = 0;
3783         dpsoftrast.user.color[0] = 1;
3784         dpsoftrast.user.color[1] = 1;
3785         dpsoftrast.user.color[2] = 1;
3786         dpsoftrast.user.color[3] = 1;
3787         dpsoftrast.validate = -1;
3788         DPSOFTRAST_Validate(-1);
3789         dpsoftrast.validate = 0;
3790 }
3791
3792 void DPSOFTRAST_Shutdown(void)
3793 {
3794         int i;
3795         for (i = 0;i < dpsoftrast.texture_end;i++)
3796                 if (dpsoftrast.texture[i].bytes)
3797                         free(dpsoftrast.texture[i].bytes);
3798         if (dpsoftrast.texture)
3799                 free(dpsoftrast.texture);
3800         memset(&dpsoftrast, 0, sizeof(dpsoftrast));
3801 }