4 cvar_t gl_mesh_maxtriangles = {0, "gl_mesh_maxtriangles", "1024"};
5 cvar_t gl_mesh_floatcolors = {0, "gl_mesh_floatcolors", "1"};
6 cvar_t gl_mesh_drawmode = {CVAR_SAVE, "gl_mesh_drawmode", "3"};
8 cvar_t r_render = {0, "r_render", "1"};
9 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1"}; // whether or not to use dithering
10 cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
12 // this is used to increase gl_mesh_maxtriangles automatically if a mesh was
13 // too large for the buffers in the previous frame
14 int overflowedverts = 0;
16 int gl_maxdrawrangeelementsvertices;
17 int gl_maxdrawrangeelementsindices;
22 void GL_PrintError(int errornumber, char *filename, int linenumber)
26 #ifdef GL_INVALID_ENUM
28 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
31 #ifdef GL_INVALID_VALUE
32 case GL_INVALID_VALUE:
33 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
36 #ifdef GL_INVALID_OPERATION
37 case GL_INVALID_OPERATION:
38 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
41 #ifdef GL_STACK_OVERFLOW
42 case GL_STACK_OVERFLOW:
43 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
46 #ifdef GL_STACK_UNDERFLOW
47 case GL_STACK_UNDERFLOW:
48 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
51 #ifdef GL_OUT_OF_MEMORY
52 case GL_OUT_OF_MEMORY:
53 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
56 #ifdef GL_TABLE_TOO_LARGE
57 case GL_TABLE_TOO_LARGE:
58 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
62 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
68 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active\n");
72 static float viewdist;
73 // sign bits (true if negative) for vpn[] entries, so quick integer compares can be used instead of float compares
74 static int vpnbit0, vpnbit1, vpnbit2;
76 int c_meshs, c_meshtris;
80 float overbrightscale;
82 void SCR_ScreenShot_f (void);
84 // these are externally accessible
85 float mesh_colorscale;
89 float *varray_texcoord[MAX_TEXTUREUNITS];
91 int mesh_maxverts; // always mesh_maxtris * 3
93 static matrix4x4_t backend_viewmatrix;
94 static matrix4x4_t backend_modelmatrix;
95 static matrix4x4_t backend_modelviewmatrix;
96 static matrix4x4_t backend_glmodelviewmatrix;
98 static int backendunits, backendactive;
99 static qbyte *varray_bcolor;
100 static mempool_t *gl_backend_mempool;
102 void GL_Backend_AllocArrays(void)
106 if (!gl_backend_mempool)
107 gl_backend_mempool = Mem_AllocPool("GL_Backend");
109 mesh_maxverts = mesh_maxtris * 3;
111 varray_element = Mem_Alloc(gl_backend_mempool, mesh_maxtris * sizeof(int[3]));
112 varray_vertex = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
113 varray_color = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
114 varray_bcolor = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(qbyte[4]));
115 for (i = 0;i < backendunits;i++)
116 varray_texcoord[i] = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[2]));
117 for (;i < MAX_TEXTUREUNITS;i++)
118 varray_texcoord[i] = NULL;
121 void GL_Backend_FreeArrays(int resizingbuffers)
125 Mem_EmptyPool(gl_backend_mempool);
127 Mem_FreePool(&gl_backend_mempool);
128 varray_element = NULL;
129 varray_vertex = NULL;
131 varray_bcolor = NULL;
132 for (i = 0;i < MAX_TEXTUREUNITS;i++)
133 varray_texcoord[i] = NULL;
136 static void gl_backend_start(void)
138 Con_Printf("OpenGL Backend started with gl_mesh_maxtriangles %i\n", gl_mesh_maxtriangles.integer);
139 if (qglDrawRangeElements != NULL)
141 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
142 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
144 Con_Printf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
146 if (strstr(gl_renderer, "3Dfx"))
148 Con_Printf("3Dfx driver detected, forcing gl_mesh_floatcolors to 0 to prevent crashs\n");
149 Cvar_SetValueQuick(&gl_mesh_floatcolors, 0);
152 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
154 GL_Backend_AllocArrays();
156 backendactive = true;
159 static void gl_backend_shutdown(void)
162 backendactive = false;
164 Con_Printf("OpenGL Backend shutting down\n");
166 GL_Backend_FreeArrays(false);
169 void GL_Backend_CheckCvars(void)
171 if (gl_mesh_drawmode.integer < 0)
172 Cvar_SetValueQuick(&gl_mesh_drawmode, 0);
173 if (gl_mesh_drawmode.integer > 3)
174 Cvar_SetValueQuick(&gl_mesh_drawmode, 3);
176 // change drawmode 3 to 2 if 3 won't work
177 if (gl_mesh_drawmode.integer >= 3 && qglDrawRangeElements == NULL)
178 Cvar_SetValueQuick(&gl_mesh_drawmode, 2);
180 // 21760 is (65536 / 3) rounded off to a multiple of 128
181 if (gl_mesh_maxtriangles.integer < 1024)
182 Cvar_SetValueQuick(&gl_mesh_maxtriangles, 1024);
183 if (gl_mesh_maxtriangles.integer > 21760)
184 Cvar_SetValueQuick(&gl_mesh_maxtriangles, 21760);
187 void GL_Backend_ResizeArrays(int numtriangles)
189 Cvar_SetValueQuick(&gl_mesh_maxtriangles, numtriangles);
190 GL_Backend_CheckCvars();
191 mesh_maxtris = gl_mesh_maxtriangles.integer;
192 GL_Backend_FreeArrays(true);
193 GL_Backend_AllocArrays();
196 static void gl_backend_newmap(void)
200 void gl_backend_init(void)
202 Cvar_RegisterVariable(&r_render);
203 Cvar_RegisterVariable(&gl_dither);
204 Cvar_RegisterVariable(&gl_lockarrays);
206 Cvar_SetValue("r_render", 0);
209 Cvar_RegisterVariable(&gl_mesh_maxtriangles);
210 Cvar_RegisterVariable(&gl_mesh_floatcolors);
211 Cvar_RegisterVariable(&gl_mesh_drawmode);
212 GL_Backend_CheckCvars();
213 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
221 static void GL_SetupFrame (void)
224 double fovx, fovy, zNear, zFar, aspect;
226 if (!r_render.integer)
229 qglDepthFunc (GL_LEQUAL);CHECKGLERROR
232 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
233 qglLoadIdentity ();CHECKGLERROR
235 // y is weird beause OpenGL is bottom to top, we use top to bottom
236 qglViewport(r_refdef.x, vid.realheight - (r_refdef.y + r_refdef.height), r_refdef.width, r_refdef.height);CHECKGLERROR
240 zFar = r_mesh_farclip;
245 fovx = r_refdef.fov_x;
246 fovy = r_refdef.fov_y;
247 aspect = r_refdef.width / r_refdef.height;
250 xmax = zNear * tan(fovx * M_PI / 360.0) * aspect;
251 ymax = zNear * tan(fovy * M_PI / 360.0);
254 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
256 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
258 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
259 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
260 Matrix4x4_ConcatRotate(&backend_viewmatrix, -r_refdef.viewangles[2], 1, 0, 0);
261 Matrix4x4_ConcatRotate(&backend_viewmatrix, -r_refdef.viewangles[0], 0, 1, 0);
262 Matrix4x4_ConcatRotate(&backend_viewmatrix, -r_refdef.viewangles[1], 0, 0, 1);
263 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -r_refdef.vieworg[0], -r_refdef.vieworg[1], -r_refdef.vieworg[2]);
264 //Con_Printf("Our Matrix:\n");
265 //Matrix4x4_Print(&backend_viewmatrix);
267 //Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_viewmatrix);
268 //qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);CHECKGLERROR
269 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
273 qglLoadIdentity ();CHECKGLERROR
274 qglRotatef (-90, 1, 0, 0);CHECKGLERROR
275 qglRotatef (90, 0, 0, 1);CHECKGLERROR
277 qglRotatef (-r_refdef.viewangles[2], 1, 0, 0);CHECKGLERROR
278 qglRotatef (-r_refdef.viewangles[0], 0, 1, 0);CHECKGLERROR
279 qglRotatef (-r_refdef.viewangles[1], 0, 0, 1);CHECKGLERROR
281 qglTranslatef (-r_refdef.vieworg[0], -r_refdef.vieworg[1], -r_refdef.vieworg[2]);CHECKGLERROR
282 qglGetFloatv (GL_MODELVIEW_MATRIX, &gl_viewmatrix.m[0][0]);
283 Matrix4x4_Transpose(&backend_viewmatrix, &gl_viewmatrix);
284 Con_Printf("GL Matrix:\n");
285 Matrix4x4_Print(&backend_viewmatrix);
298 int texture[MAX_TEXTUREUNITS];
299 float texturergbscale[MAX_TEXTUREUNITS];
303 void GL_SetupTextureState(void)
306 if (backendunits > 1)
308 for (i = 0;i < backendunits;i++)
310 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
311 qglBindTexture(GL_TEXTURE_2D, gl_state.texture[i]);CHECKGLERROR
312 if (gl_combine.integer)
314 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
315 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
316 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
317 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
318 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);CHECKGLERROR
319 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
320 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
321 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
322 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
323 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
324 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
325 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
326 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
327 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
328 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
329 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, gl_state.texturergbscale[i]);CHECKGLERROR
330 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
334 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
336 if (gl_state.texture[i])
338 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
342 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
344 if (gl_mesh_drawmode.integer > 0)
346 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
347 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), varray_texcoord[i]);CHECKGLERROR
348 if (gl_state.texture[i])
350 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
354 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
361 qglBindTexture(GL_TEXTURE_2D, gl_state.texture[0]);CHECKGLERROR
362 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
363 if (gl_state.texture[0])
365 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
369 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
371 if (gl_mesh_drawmode.integer > 0)
373 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), varray_texcoord[0]);CHECKGLERROR
374 if (gl_state.texture[0])
376 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
380 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
387 void GL_Backend_ResetState(void)
391 gl_state.clientunit = 0;
393 for (i = 0;i < backendunits;i++)
395 gl_state.texture[i] = 0;
396 gl_state.texturergbscale[i] = 1;
399 qglEnable(GL_CULL_FACE);CHECKGLERROR
400 qglCullFace(GL_FRONT);CHECKGLERROR
402 gl_state.depthdisable = false;
403 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
405 gl_state.blendfunc1 = GL_ONE;
406 gl_state.blendfunc2 = GL_ZERO;
407 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
410 qglDisable(GL_BLEND);CHECKGLERROR
412 gl_state.depthmask = GL_TRUE;
413 qglDepthMask(gl_state.depthmask);CHECKGLERROR
416 if (gl_mesh_drawmode.integer > 0)
419 qglVertexPointer(3, GL_FLOAT, sizeof(float[4]), varray_vertex);CHECKGLERROR
420 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
421 if (gl_mesh_floatcolors.integer)
423 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), varray_color);CHECKGLERROR
427 qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(qbyte[4]), varray_bcolor);CHECKGLERROR
429 qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
432 GL_SetupTextureState();
435 // called at beginning of frame
436 void R_Mesh_Start(float farclip)
442 r_mesh_farclip = farclip;
443 viewdist = DotProduct(r_origin, vpn);
444 vpnbit0 = vpn[0] < 0;
445 vpnbit1 = vpn[1] < 0;
446 vpnbit2 = vpn[2] < 0;
451 GL_Backend_CheckCvars();
452 if (mesh_maxtris != gl_mesh_maxtriangles.integer)
453 GL_Backend_ResizeArrays(gl_mesh_maxtriangles.integer);
457 GL_Backend_ResetState();
460 int gl_backend_rebindtextures;
462 void GL_ConvertColorsFloatToByte(int numverts)
465 // LordHavoc: to avoid problems with aliasing (treating memory as two
466 // different types - exactly what this is doing), these must be volatile
468 volatile int *icolor;
469 volatile float *fcolor;
472 total = numverts * 4;
474 // shift float to have 8bit fraction at base of number
475 fcolor = varray_color;
476 for (i = 0;i < total;)
478 fcolor[i ] += 32768.0f;
479 fcolor[i + 1] += 32768.0f;
480 fcolor[i + 2] += 32768.0f;
481 fcolor[i + 3] += 32768.0f;
485 // then read as integer and kill float bits...
486 icolor = (int *)varray_color;
487 bcolor = varray_bcolor;
488 for (i = 0;i < total;)
490 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
491 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
492 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
493 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
499 void GL_TransformVertices(int numverts)
502 float m[12], tempv[4], *v;
503 m[0] = backendmatrix.m[0][0];
504 m[1] = backendmatrix.m[0][1];
505 m[2] = backendmatrix.m[0][2];
506 m[3] = backendmatrix.m[0][3];
507 m[4] = backendmatrix.m[1][0];
508 m[5] = backendmatrix.m[1][1];
509 m[6] = backendmatrix.m[1][2];
510 m[7] = backendmatrix.m[1][3];
511 m[8] = backendmatrix.m[2][0];
512 m[9] = backendmatrix.m[2][1];
513 m[10] = backendmatrix.m[2][2];
514 m[11] = backendmatrix.m[2][3];
515 for (i = 0, v = varray_vertex;i < numverts;i++, v += 4)
517 VectorCopy(v, tempv);
518 v[0] = tempv[0] * m[0] + tempv[1] * m[1] + tempv[2] * m[2] + m[3];
519 v[1] = tempv[0] * m[4] + tempv[1] * m[5] + tempv[2] * m[6] + m[7];
520 v[2] = tempv[0] * m[8] + tempv[1] * m[9] + tempv[2] * m[10] + m[11];
525 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, GLuint *index)
527 unsigned int i, j, in;
530 int arraylocked = false;
531 if (gl_supportslockarrays && gl_lockarrays.integer && gl_mesh_drawmode.integer > 0)
533 qglLockArraysEXT(firstvert, endvert - firstvert);
537 if (gl_mesh_drawmode.integer >= 3/* && (endvert - firstvert) <= gl_maxdrawrangeelementsvertices && (indexcount) <= gl_maxdrawrangeelementsindices*/)
539 // GL 1.2 or GL 1.1 with extension
540 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, index);
543 else if (gl_mesh_drawmode.integer >= 2)
546 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, index);
549 else if (gl_mesh_drawmode.integer >= 1)
552 // feed it manually using glArrayElement
553 qglBegin(GL_TRIANGLES);
554 for (i = 0;i < indexcount;i++)
555 qglArrayElement(index[i]);
561 // GL 1.1 but not using vertex arrays - 3dfx glquake minigl driver
563 qglBegin(GL_TRIANGLES);
564 if (gl_state.texture[1]) // if the mesh uses multiple textures
566 // the minigl doesn't have this (because it does not have ARB_multitexture)
567 for (i = 0;i < indexcount;i++)
570 c = varray_bcolor + in * 4;
571 qglColor4ub(c[0], c[1], c[2], c[3]);
572 for (j = 0;j < backendunits;j++)
574 if (gl_state.texture[j])
576 v = varray_texcoord[j] + in * 2;
577 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, v[0], v[1]);
580 v = varray_vertex + in * 4;
581 qglVertex3f(v[0], v[1], v[2]);
586 for (i = 0;i < indexcount;i++)
589 c = varray_bcolor + in * 4;
590 qglColor4ub(c[0], c[1], c[2], c[3]);
591 if (gl_state.texture[0])
593 v = varray_texcoord[0] + in * 2;
594 qglTexCoord2f(v[0], v[1]);
596 v = varray_vertex + in * 4;
597 qglVertex3f(v[0], v[1], v[2]);
605 qglUnlockArraysEXT();
611 // enlarges geometry buffers if they are too small
612 void _R_Mesh_ResizeCheck(int numverts, int numtriangles)
614 if (numtriangles > mesh_maxtris || numverts > mesh_maxverts)
617 GL_Backend_ResizeArrays(max(numtriangles, (numverts + 2) / 3) + 100);
618 GL_Backend_ResetState();
623 void R_Mesh_Draw(int numverts, int numtriangles)
628 c_meshtris += numtriangles;
632 // drawmode 0 always uses byte colors
633 if (!gl_mesh_floatcolors.integer || gl_mesh_drawmode.integer <= 0)
634 GL_ConvertColorsFloatToByte(numverts);
635 //GL_TransformVertices(numverts);
636 if (!r_render.integer)
638 GL_DrawRangeElements(0, numverts, numtriangles * 3, varray_element);
641 // restores backend state, used when done with 3D rendering
642 void R_Mesh_Finish(void)
647 if (backendunits > 1)
649 for (i = backendunits - 1;i >= 0;i--)
651 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
652 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
653 if (gl_combine.integer)
655 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
659 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
663 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
665 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
669 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
670 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
676 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
677 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
680 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
685 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
686 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
689 qglDisable(GL_BLEND);CHECKGLERROR
690 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
691 qglDepthMask(GL_TRUE);CHECKGLERROR
692 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
695 void R_Mesh_ClearDepth(void)
700 qglClear(GL_DEPTH_BUFFER_BIT);
701 R_Mesh_Start(r_mesh_farclip);
704 void R_Mesh_Matrix(const matrix4x4_t *matrix)
706 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
708 backend_modelmatrix = *matrix;
709 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
710 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
711 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
715 // sets up the requested state
716 void R_Mesh_State(const rmeshstate_t *m)
719 int texturergbscale[MAX_TEXTUREUNITS];
724 if (gl_backend_rebindtextures)
726 gl_backend_rebindtextures = false;
727 GL_SetupTextureState();
732 if (m->blendfunc1 == GL_DST_COLOR)
734 // check if it is a 2x modulate with framebuffer
735 if (m->blendfunc2 == GL_SRC_COLOR)
738 else if (m->blendfunc2 != GL_SRC_COLOR)
742 overbright = m->wantoverbright && gl_combine.integer;
746 scaler *= overbrightscale;
748 mesh_colorscale = scaler;
750 if (gl_state.blendfunc1 != m->blendfunc1 || gl_state.blendfunc2 != m->blendfunc2)
752 qglBlendFunc(gl_state.blendfunc1 = m->blendfunc1, gl_state.blendfunc2 = m->blendfunc2);CHECKGLERROR
753 if (gl_state.blendfunc2 == GL_ZERO)
755 if (gl_state.blendfunc1 == GL_ONE)
760 qglDisable(GL_BLEND);CHECKGLERROR
768 qglEnable(GL_BLEND);CHECKGLERROR
777 qglEnable(GL_BLEND);CHECKGLERROR
781 if (gl_state.depthdisable != m->depthdisable)
783 gl_state.depthdisable = m->depthdisable;
784 if (gl_state.depthdisable)
785 qglDisable(GL_DEPTH_TEST);
787 qglEnable(GL_DEPTH_TEST);
789 if (gl_state.depthmask != (m->blendfunc2 == GL_ZERO || m->depthwrite))
791 qglDepthMask(gl_state.depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite));CHECKGLERROR
794 for (i = 0;i < backendunits;i++)
796 if (m->texrgbscale[i])
797 texturergbscale[i] = m->texrgbscale[i];
799 texturergbscale[i] = 1;
803 for (i = backendunits - 1;i >= 0;i--)
807 texturergbscale[i] = 4;
813 if (backendunits > 1)
815 for (i = 0;i < backendunits;i++)
817 if (gl_state.texture[i] != m->tex[i])
819 if (gl_state.unit != i)
821 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
823 if (gl_state.texture[i] == 0)
825 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
826 if (gl_state.clientunit != i)
828 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
830 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
832 qglBindTexture(GL_TEXTURE_2D, (gl_state.texture[i] = m->tex[i]));CHECKGLERROR
833 if (gl_state.texture[i] == 0)
835 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
836 if (gl_state.clientunit != i)
838 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
840 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
843 if (gl_state.texturergbscale[i] != texturergbscale[i])
845 if (gl_state.unit != i)
847 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
849 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (gl_state.texturergbscale[i] = texturergbscale[i]));CHECKGLERROR
855 if (gl_state.texture[0] != m->tex[0])
857 if (gl_state.texture[0] == 0)
859 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
860 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
862 qglBindTexture(GL_TEXTURE_2D, (gl_state.texture[0] = m->tex[0]));CHECKGLERROR
863 if (gl_state.texture[0] == 0)
865 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
866 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
873 ==============================================================================
877 ==============================================================================
880 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
886 if (!r_render.integer)
889 buffer = Mem_Alloc(tempmempool, width*height*3);
890 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
893 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
894 if (v_hwgamma.integer)
895 for (i = 0;i < width * height * 3;i++)
896 buffer[i] <<= v_overbrightbits.integer;
898 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
904 //=============================================================================
906 void R_ClearScreen(void)
908 if (r_render.integer)
911 qglClearColor(0,0,0,0);CHECKGLERROR
913 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);CHECKGLERROR
914 // set dithering mode
915 if (gl_dither.integer)
917 qglEnable(GL_DITHER);CHECKGLERROR
921 qglDisable(GL_DITHER);CHECKGLERROR
930 This is called every frame, and can also be called explicitly to flush
934 void SCR_UpdateScreen (void)
938 R_TimeReport("finish");
940 if (r_textureunits.integer > gl_textureunits)
941 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
942 if (r_textureunits.integer < 1)
943 Cvar_SetValueQuick(&r_textureunits, 1);
945 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
946 Cvar_SetValueQuick(&gl_combine, 0);
949 overbrightscale = 1.0f / (float) (1 << v_overbrightbits.integer);
952 lightscalebit = v_overbrightbits.integer;
953 if (gl_combine.integer && r_textureunits.integer > 1)
955 lightscale = 1.0f / (float) (1 << lightscalebit);
957 R_TimeReport("setup");
961 R_TimeReport("clear");
963 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
969 // tell driver to commit it's partially full geometry queue to the rendering queue
970 // (this doesn't wait for the commands themselves to complete)