4 cvar_t gl_mesh_maxverts = {0, "gl_mesh_maxverts", "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 int gl_maxdrawrangeelementsvertices;
13 int gl_maxdrawrangeelementsindices;
18 void GL_PrintError(int errornumber, char *filename, int linenumber)
22 #ifdef GL_INVALID_ENUM
24 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
27 #ifdef GL_INVALID_VALUE
28 case GL_INVALID_VALUE:
29 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
32 #ifdef GL_INVALID_OPERATION
33 case GL_INVALID_OPERATION:
34 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
37 #ifdef GL_STACK_OVERFLOW
38 case GL_STACK_OVERFLOW:
39 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
42 #ifdef GL_STACK_UNDERFLOW
43 case GL_STACK_UNDERFLOW:
44 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
47 #ifdef GL_OUT_OF_MEMORY
48 case GL_OUT_OF_MEMORY:
49 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
52 #ifdef GL_TABLE_TOO_LARGE
53 case GL_TABLE_TOO_LARGE:
54 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
58 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
64 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active\n");
68 static float viewdist;
69 // sign bits (true if negative) for vpn[] entries, so quick integer compares can be used instead of float compares
70 static int vpnbit0, vpnbit1, vpnbit2;
72 int c_meshs, c_meshtris;
76 float overbrightscale;
78 void SCR_ScreenShot_f (void);
80 // these are externally accessible
81 float mesh_colorscale;
84 float *varray_texcoord[MAX_TEXTUREUNITS];
87 static matrix4x4_t backend_viewmatrix;
88 static matrix4x4_t backend_modelmatrix;
89 static matrix4x4_t backend_modelviewmatrix;
90 static matrix4x4_t backend_glmodelviewmatrix;
92 static int backendunits, backendactive;
93 static qbyte *varray_bcolor;
94 static mempool_t *gl_backend_mempool;
96 int polygonelements[768];
98 void GL_Backend_AllocArrays(void)
102 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
104 polygonelements[i * 3 + 0] = 0;
105 polygonelements[i * 3 + 1] = i + 1;
106 polygonelements[i * 3 + 2] = i + 2;
109 if (!gl_backend_mempool)
110 gl_backend_mempool = Mem_AllocPool("GL_Backend");
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_vertex = NULL;
130 varray_bcolor = NULL;
131 for (i = 0;i < MAX_TEXTUREUNITS;i++)
132 varray_texcoord[i] = NULL;
135 static void gl_backend_start(void)
137 Con_Printf("OpenGL Backend started with gl_mesh_maxverts %i\n", gl_mesh_maxverts.integer);
138 if (qglDrawRangeElements != NULL)
140 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
141 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
143 Con_Printf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
145 if (strstr(gl_renderer, "3Dfx"))
147 Con_Printf("3Dfx driver detected, forcing gl_mesh_floatcolors to 0 to prevent crashs\n");
148 Cvar_SetValueQuick(&gl_mesh_floatcolors, 0);
151 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
153 GL_Backend_AllocArrays();
155 backendactive = true;
158 static void gl_backend_shutdown(void)
161 backendactive = false;
163 Con_Printf("OpenGL Backend shutting down\n");
165 GL_Backend_FreeArrays(false);
168 void GL_Backend_CheckCvars(void)
170 if (gl_mesh_drawmode.integer < 0)
171 Cvar_SetValueQuick(&gl_mesh_drawmode, 0);
172 if (gl_mesh_drawmode.integer > 3)
173 Cvar_SetValueQuick(&gl_mesh_drawmode, 3);
175 // change drawmode 3 to 2 if 3 won't work
176 if (gl_mesh_drawmode.integer >= 3 && qglDrawRangeElements == NULL)
177 Cvar_SetValueQuick(&gl_mesh_drawmode, 2);
179 // 21760 is (65536 / 3) rounded off to a multiple of 128
180 if (gl_mesh_maxverts.integer < 1024)
181 Cvar_SetValueQuick(&gl_mesh_maxverts, 1024);
182 if (gl_mesh_maxverts.integer > 21760)
183 Cvar_SetValueQuick(&gl_mesh_maxverts, 21760);
186 void GL_Backend_ResizeArrays(int numtriangles)
188 Cvar_SetValueQuick(&gl_mesh_maxverts, numtriangles);
189 GL_Backend_CheckCvars();
190 mesh_maxverts = gl_mesh_maxverts.integer;
191 GL_Backend_FreeArrays(true);
192 GL_Backend_AllocArrays();
195 static void gl_backend_newmap(void)
199 void gl_backend_init(void)
201 Cvar_RegisterVariable(&r_render);
202 Cvar_RegisterVariable(&gl_dither);
203 Cvar_RegisterVariable(&gl_lockarrays);
205 Cvar_SetValue("r_render", 0);
208 Cvar_RegisterVariable(&gl_mesh_maxverts);
209 Cvar_RegisterVariable(&gl_mesh_floatcolors);
210 Cvar_RegisterVariable(&gl_mesh_drawmode);
211 GL_Backend_CheckCvars();
212 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
220 static void GL_SetupFrame (void)
223 double fovx, fovy, zNear, zFar, aspect;
225 if (!r_render.integer)
228 qglDepthFunc (GL_LEQUAL);CHECKGLERROR
231 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
232 qglLoadIdentity ();CHECKGLERROR
234 // y is weird beause OpenGL is bottom to top, we use top to bottom
235 qglViewport(r_refdef.x, vid.realheight - (r_refdef.y + r_refdef.height), r_refdef.width, r_refdef.height);CHECKGLERROR
239 zFar = r_mesh_farclip;
244 fovx = r_refdef.fov_x;
245 fovy = r_refdef.fov_y;
246 aspect = r_refdef.width / r_refdef.height;
249 xmax = zNear * tan(fovx * M_PI / 360.0) * aspect;
250 ymax = zNear * tan(fovy * M_PI / 360.0);
253 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
255 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
257 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
258 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
259 Matrix4x4_ConcatRotate(&backend_viewmatrix, -r_refdef.viewangles[2], 1, 0, 0);
260 Matrix4x4_ConcatRotate(&backend_viewmatrix, -r_refdef.viewangles[0], 0, 1, 0);
261 Matrix4x4_ConcatRotate(&backend_viewmatrix, -r_refdef.viewangles[1], 0, 0, 1);
262 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -r_refdef.vieworg[0], -r_refdef.vieworg[1], -r_refdef.vieworg[2]);
263 //Con_Printf("Our Matrix:\n");
264 //Matrix4x4_Print(&backend_viewmatrix);
266 //Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_viewmatrix);
267 //qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);CHECKGLERROR
268 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
272 qglLoadIdentity ();CHECKGLERROR
273 qglRotatef (-90, 1, 0, 0);CHECKGLERROR
274 qglRotatef (90, 0, 0, 1);CHECKGLERROR
276 qglRotatef (-r_refdef.viewangles[2], 1, 0, 0);CHECKGLERROR
277 qglRotatef (-r_refdef.viewangles[0], 0, 1, 0);CHECKGLERROR
278 qglRotatef (-r_refdef.viewangles[1], 0, 0, 1);CHECKGLERROR
280 qglTranslatef (-r_refdef.vieworg[0], -r_refdef.vieworg[1], -r_refdef.vieworg[2]);CHECKGLERROR
281 qglGetFloatv (GL_MODELVIEW_MATRIX, &gl_viewmatrix.m[0][0]);
282 Matrix4x4_Transpose(&backend_viewmatrix, &gl_viewmatrix);
283 Con_Printf("GL Matrix:\n");
284 Matrix4x4_Print(&backend_viewmatrix);
297 int texture[MAX_TEXTUREUNITS];
298 float texturergbscale[MAX_TEXTUREUNITS];
302 void GL_SetupTextureState(void)
305 if (backendunits > 1)
307 for (i = 0;i < backendunits;i++)
309 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
310 qglBindTexture(GL_TEXTURE_2D, gl_state.texture[i]);CHECKGLERROR
311 if (gl_combine.integer)
313 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
314 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
315 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
316 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
317 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);CHECKGLERROR
318 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
319 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
320 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
321 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
322 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
323 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
324 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
325 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
326 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
327 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
328 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, gl_state.texturergbscale[i]);CHECKGLERROR
329 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
333 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
335 if (gl_state.texture[i])
337 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
341 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
343 if (gl_mesh_drawmode.integer > 0)
345 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
346 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), varray_texcoord[i]);CHECKGLERROR
347 if (gl_state.texture[i])
349 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
353 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
360 qglBindTexture(GL_TEXTURE_2D, gl_state.texture[0]);CHECKGLERROR
361 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
362 if (gl_state.texture[0])
364 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
368 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
370 if (gl_mesh_drawmode.integer > 0)
372 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), varray_texcoord[0]);CHECKGLERROR
373 if (gl_state.texture[0])
375 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
379 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
386 void GL_Backend_ResetState(void)
390 gl_state.clientunit = 0;
392 for (i = 0;i < backendunits;i++)
394 gl_state.texture[i] = 0;
395 gl_state.texturergbscale[i] = 1;
398 qglEnable(GL_CULL_FACE);CHECKGLERROR
399 qglCullFace(GL_FRONT);CHECKGLERROR
401 gl_state.depthdisable = false;
402 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
404 gl_state.blendfunc1 = GL_ONE;
405 gl_state.blendfunc2 = GL_ZERO;
406 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
409 qglDisable(GL_BLEND);CHECKGLERROR
411 gl_state.depthmask = GL_TRUE;
412 qglDepthMask(gl_state.depthmask);CHECKGLERROR
415 if (gl_mesh_drawmode.integer > 0)
418 qglVertexPointer(3, GL_FLOAT, sizeof(float[4]), varray_vertex);CHECKGLERROR
419 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
420 if (gl_mesh_floatcolors.integer)
422 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), varray_color);CHECKGLERROR
426 qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(qbyte[4]), varray_bcolor);CHECKGLERROR
428 qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
431 GL_SetupTextureState();
434 // called at beginning of frame
435 void R_Mesh_Start(float farclip)
441 r_mesh_farclip = farclip;
442 viewdist = DotProduct(r_origin, vpn);
443 vpnbit0 = vpn[0] < 0;
444 vpnbit1 = vpn[1] < 0;
445 vpnbit2 = vpn[2] < 0;
450 GL_Backend_CheckCvars();
451 if (mesh_maxverts != gl_mesh_maxverts.integer)
452 GL_Backend_ResizeArrays(gl_mesh_maxverts.integer);
456 GL_Backend_ResetState();
459 int gl_backend_rebindtextures;
461 void GL_ConvertColorsFloatToByte(int numverts)
464 // LordHavoc: to avoid problems with aliasing (treating memory as two
465 // different types - exactly what this is doing), these must be volatile
467 volatile int *icolor;
468 volatile float *fcolor;
471 total = numverts * 4;
473 // shift float to have 8bit fraction at base of number
474 fcolor = varray_color;
475 for (i = 0;i < total;)
477 fcolor[i ] += 32768.0f;
478 fcolor[i + 1] += 32768.0f;
479 fcolor[i + 2] += 32768.0f;
480 fcolor[i + 3] += 32768.0f;
484 // then read as integer and kill float bits...
485 icolor = (int *)varray_color;
486 bcolor = varray_bcolor;
487 for (i = 0;i < total;)
489 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
490 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
491 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
492 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
498 void GL_TransformVertices(int numverts)
501 float m[12], tempv[4], *v;
502 m[0] = backendmatrix.m[0][0];
503 m[1] = backendmatrix.m[0][1];
504 m[2] = backendmatrix.m[0][2];
505 m[3] = backendmatrix.m[0][3];
506 m[4] = backendmatrix.m[1][0];
507 m[5] = backendmatrix.m[1][1];
508 m[6] = backendmatrix.m[1][2];
509 m[7] = backendmatrix.m[1][3];
510 m[8] = backendmatrix.m[2][0];
511 m[9] = backendmatrix.m[2][1];
512 m[10] = backendmatrix.m[2][2];
513 m[11] = backendmatrix.m[2][3];
514 for (i = 0, v = varray_vertex;i < numverts;i++, v += 4)
516 VectorCopy(v, tempv);
517 v[0] = tempv[0] * m[0] + tempv[1] * m[1] + tempv[2] * m[2] + m[3];
518 v[1] = tempv[0] * m[4] + tempv[1] * m[5] + tempv[2] * m[6] + m[7];
519 v[2] = tempv[0] * m[8] + tempv[1] * m[9] + tempv[2] * m[10] + m[11];
524 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, GLuint *index)
526 unsigned int i, j, in;
529 int arraylocked = false;
530 if (gl_supportslockarrays && gl_lockarrays.integer && gl_mesh_drawmode.integer > 0)
532 qglLockArraysEXT(firstvert, endvert - firstvert);
536 if (gl_mesh_drawmode.integer >= 3/* && (endvert - firstvert) <= gl_maxdrawrangeelementsvertices && (indexcount) <= gl_maxdrawrangeelementsindices*/)
538 // GL 1.2 or GL 1.1 with extension
539 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, index);
542 else if (gl_mesh_drawmode.integer >= 2)
545 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, index);
548 else if (gl_mesh_drawmode.integer >= 1)
551 // feed it manually using glArrayElement
552 qglBegin(GL_TRIANGLES);
553 for (i = 0;i < indexcount;i++)
554 qglArrayElement(index[i]);
560 // GL 1.1 but not using vertex arrays - 3dfx glquake minigl driver
562 qglBegin(GL_TRIANGLES);
563 if (gl_state.texture[1]) // if the mesh uses multiple textures
565 // the minigl doesn't have this (because it does not have ARB_multitexture)
566 for (i = 0;i < indexcount;i++)
569 c = varray_bcolor + in * 4;
570 qglColor4ub(c[0], c[1], c[2], c[3]);
571 for (j = 0;j < backendunits;j++)
573 if (gl_state.texture[j])
575 v = varray_texcoord[j] + in * 2;
576 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, v[0], v[1]);
579 v = varray_vertex + in * 4;
580 qglVertex3f(v[0], v[1], v[2]);
585 for (i = 0;i < indexcount;i++)
588 c = varray_bcolor + in * 4;
589 qglColor4ub(c[0], c[1], c[2], c[3]);
590 if (gl_state.texture[0])
592 v = varray_texcoord[0] + in * 2;
593 qglTexCoord2f(v[0], v[1]);
595 v = varray_vertex + in * 4;
596 qglVertex3f(v[0], v[1], v[2]);
604 qglUnlockArraysEXT();
610 // enlarges geometry buffers if they are too small
611 void _R_Mesh_ResizeCheck(int numverts)
613 if (numverts > mesh_maxverts)
616 GL_Backend_ResizeArrays(numverts + 100);
617 GL_Backend_ResetState();
622 void R_Mesh_Draw(int numverts, int numtriangles, int *elements)
627 c_meshtris += numtriangles;
631 // drawmode 0 always uses byte colors
632 if (!gl_mesh_floatcolors.integer || gl_mesh_drawmode.integer <= 0)
633 GL_ConvertColorsFloatToByte(numverts);
634 //GL_TransformVertices(numverts);
635 if (!r_render.integer)
637 GL_DrawRangeElements(0, numverts, numtriangles * 3, elements);
640 // restores backend state, used when done with 3D rendering
641 void R_Mesh_Finish(void)
646 if (backendunits > 1)
648 for (i = backendunits - 1;i >= 0;i--)
650 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
651 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
652 if (gl_combine.integer)
654 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
658 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
662 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
664 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
668 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
669 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
675 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
676 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
679 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
684 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
685 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
688 qglDisable(GL_BLEND);CHECKGLERROR
689 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
690 qglDepthMask(GL_TRUE);CHECKGLERROR
691 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
694 void R_Mesh_ClearDepth(void)
699 qglClear(GL_DEPTH_BUFFER_BIT);
700 R_Mesh_Start(r_mesh_farclip);
703 void R_Mesh_Matrix(const matrix4x4_t *matrix)
705 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
707 backend_modelmatrix = *matrix;
708 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
709 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
710 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
714 // sets up the requested state
715 void R_Mesh_State(const rmeshstate_t *m)
718 int texturergbscale[MAX_TEXTUREUNITS];
723 if (gl_backend_rebindtextures)
725 gl_backend_rebindtextures = false;
726 GL_SetupTextureState();
731 if (m->blendfunc1 == GL_DST_COLOR)
733 // check if it is a 2x modulate with framebuffer
734 if (m->blendfunc2 == GL_SRC_COLOR)
737 else if (m->blendfunc2 != GL_SRC_COLOR)
741 overbright = m->wantoverbright && gl_combine.integer;
745 scaler *= overbrightscale;
747 mesh_colorscale = scaler;
749 if (gl_state.blendfunc1 != m->blendfunc1 || gl_state.blendfunc2 != m->blendfunc2)
751 qglBlendFunc(gl_state.blendfunc1 = m->blendfunc1, gl_state.blendfunc2 = m->blendfunc2);CHECKGLERROR
752 if (gl_state.blendfunc2 == GL_ZERO)
754 if (gl_state.blendfunc1 == GL_ONE)
759 qglDisable(GL_BLEND);CHECKGLERROR
767 qglEnable(GL_BLEND);CHECKGLERROR
776 qglEnable(GL_BLEND);CHECKGLERROR
780 if (gl_state.depthdisable != m->depthdisable)
782 gl_state.depthdisable = m->depthdisable;
783 if (gl_state.depthdisable)
784 qglDisable(GL_DEPTH_TEST);
786 qglEnable(GL_DEPTH_TEST);
788 if (gl_state.depthmask != (m->blendfunc2 == GL_ZERO || m->depthwrite))
790 qglDepthMask(gl_state.depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite));CHECKGLERROR
793 for (i = 0;i < backendunits;i++)
795 if (m->texrgbscale[i])
796 texturergbscale[i] = m->texrgbscale[i];
798 texturergbscale[i] = 1;
802 for (i = backendunits - 1;i >= 0;i--)
806 texturergbscale[i] = 4;
812 if (backendunits > 1)
814 for (i = 0;i < backendunits;i++)
816 if (gl_state.texture[i] != m->tex[i])
818 if (gl_state.unit != i)
820 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
822 if (gl_state.texture[i] == 0)
824 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
825 if (gl_state.clientunit != i)
827 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
829 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
831 qglBindTexture(GL_TEXTURE_2D, (gl_state.texture[i] = m->tex[i]));CHECKGLERROR
832 if (gl_state.texture[i] == 0)
834 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
835 if (gl_state.clientunit != i)
837 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
839 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
842 if (gl_state.texturergbscale[i] != texturergbscale[i])
844 if (gl_state.unit != i)
846 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
848 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (gl_state.texturergbscale[i] = texturergbscale[i]));CHECKGLERROR
854 if (gl_state.texture[0] != m->tex[0])
856 if (gl_state.texture[0] == 0)
858 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
859 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
861 qglBindTexture(GL_TEXTURE_2D, (gl_state.texture[0] = m->tex[0]));CHECKGLERROR
862 if (gl_state.texture[0] == 0)
864 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
865 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
872 ==============================================================================
876 ==============================================================================
879 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
885 if (!r_render.integer)
888 buffer = Mem_Alloc(tempmempool, width*height*3);
889 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
892 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
893 if (v_hwgamma.integer)
894 for (i = 0;i < width * height * 3;i++)
895 buffer[i] <<= v_overbrightbits.integer;
897 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
903 //=============================================================================
905 void R_ClearScreen(void)
907 if (r_render.integer)
910 qglClearColor(0,0,0,0);CHECKGLERROR
912 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);CHECKGLERROR
913 // set dithering mode
914 if (gl_dither.integer)
916 qglEnable(GL_DITHER);CHECKGLERROR
920 qglDisable(GL_DITHER);CHECKGLERROR
929 This is called every frame, and can also be called explicitly to flush
933 void SCR_UpdateScreen (void)
937 R_TimeReport("finish");
939 if (r_textureunits.integer > gl_textureunits)
940 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
941 if (r_textureunits.integer < 1)
942 Cvar_SetValueQuick(&r_textureunits, 1);
944 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
945 Cvar_SetValueQuick(&gl_combine, 0);
948 overbrightscale = 1.0f / (float) (1 << v_overbrightbits.integer);
951 lightscalebit = v_overbrightbits.integer;
952 if (gl_combine.integer && r_textureunits.integer > 1)
954 lightscale = 1.0f / (float) (1 << lightscalebit);
956 R_TimeReport("setup");
960 R_TimeReport("clear");
962 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
968 // tell driver to commit it's partially full geometry queue to the rendering queue
969 // (this doesn't wait for the commands themselves to complete)