5 cvar_t gl_mesh_maxverts = {0, "gl_mesh_maxverts", "1024"};
6 cvar_t gl_mesh_floatcolors = {0, "gl_mesh_floatcolors", "1"};
7 cvar_t gl_mesh_drawrangeelements = {0, "gl_mesh_drawrangeelements", "1"};
9 cvar_t r_render = {0, "r_render", "1"};
10 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1"}; // whether or not to use dithering
11 cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
13 int gl_maxdrawrangeelementsvertices;
14 int gl_maxdrawrangeelementsindices;
19 void GL_PrintError(int errornumber, char *filename, int linenumber)
23 #ifdef GL_INVALID_ENUM
25 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
28 #ifdef GL_INVALID_VALUE
29 case GL_INVALID_VALUE:
30 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
33 #ifdef GL_INVALID_OPERATION
34 case GL_INVALID_OPERATION:
35 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
38 #ifdef GL_STACK_OVERFLOW
39 case GL_STACK_OVERFLOW:
40 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
43 #ifdef GL_STACK_UNDERFLOW
44 case GL_STACK_UNDERFLOW:
45 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
48 #ifdef GL_OUT_OF_MEMORY
49 case GL_OUT_OF_MEMORY:
50 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
53 #ifdef GL_TABLE_TOO_LARGE
54 case GL_TABLE_TOO_LARGE:
55 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
59 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
65 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active\n");
67 int c_meshs, c_meshelements;
69 void SCR_ScreenShot_f (void);
71 // these are externally accessible
72 int r_lightmapscalebit;
76 float *varray_texcoord[MAX_TEXTUREUNITS];
79 static matrix4x4_t backend_viewmatrix;
80 static matrix4x4_t backend_modelmatrix;
81 static matrix4x4_t backend_modelviewmatrix;
82 static matrix4x4_t backend_glmodelviewmatrix;
84 static int backendunits, backendactive;
85 static qbyte *varray_bcolor;
86 static mempool_t *gl_backend_mempool;
88 int polygonelements[768];
90 void GL_Backend_AllocArrays(void)
94 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
96 polygonelements[i * 3 + 0] = 0;
97 polygonelements[i * 3 + 1] = i + 1;
98 polygonelements[i * 3 + 2] = i + 2;
101 if (!gl_backend_mempool)
102 gl_backend_mempool = Mem_AllocPool("GL_Backend");
104 varray_vertex = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
105 varray_color = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
106 varray_bcolor = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(qbyte[4]));
107 for (i = 0;i < backendunits;i++)
108 varray_texcoord[i] = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
109 for (;i < MAX_TEXTUREUNITS;i++)
110 varray_texcoord[i] = NULL;
113 void GL_Backend_FreeArrays(int resizingbuffers)
117 Mem_EmptyPool(gl_backend_mempool);
119 Mem_FreePool(&gl_backend_mempool);
120 varray_vertex = NULL;
122 varray_bcolor = NULL;
123 for (i = 0;i < MAX_TEXTUREUNITS;i++)
124 varray_texcoord[i] = NULL;
127 static void gl_backend_start(void)
129 Con_Printf("OpenGL Backend started with gl_mesh_maxverts %i\n", gl_mesh_maxverts.integer);
130 if (qglDrawRangeElements != NULL)
132 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
133 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
135 Con_Printf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
137 if (strstr(gl_renderer, "3Dfx"))
139 Con_Printf("3Dfx driver detected, forcing gl_mesh_floatcolors to 0 to prevent crashs\n");
140 Cvar_SetValueQuick(&gl_mesh_floatcolors, 0);
143 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
145 GL_Backend_AllocArrays();
147 backendactive = true;
150 static void gl_backend_shutdown(void)
153 backendactive = false;
155 Con_Printf("OpenGL Backend shutting down\n");
157 GL_Backend_FreeArrays(false);
160 void GL_Backend_CheckCvars(void)
162 // 21760 is (65536 / 3) rounded off to a multiple of 128
163 if (gl_mesh_maxverts.integer < 1024)
164 Cvar_SetValueQuick(&gl_mesh_maxverts, 1024);
165 if (gl_mesh_maxverts.integer > 21760)
166 Cvar_SetValueQuick(&gl_mesh_maxverts, 21760);
169 void GL_Backend_ResizeArrays(int numtriangles)
171 Cvar_SetValueQuick(&gl_mesh_maxverts, numtriangles);
172 GL_Backend_CheckCvars();
173 mesh_maxverts = gl_mesh_maxverts.integer;
174 GL_Backend_FreeArrays(true);
175 GL_Backend_AllocArrays();
178 static void gl_backend_newmap(void)
182 void gl_backend_init(void)
184 Cvar_RegisterVariable(&r_render);
185 Cvar_RegisterVariable(&gl_dither);
186 Cvar_RegisterVariable(&gl_lockarrays);
188 Cvar_SetValue("r_render", 0);
191 Cvar_RegisterVariable(&gl_mesh_maxverts);
192 Cvar_RegisterVariable(&gl_mesh_floatcolors);
193 Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
194 GL_Backend_CheckCvars();
195 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
198 void GL_SetupView_ViewPort (int x, int y, int width, int height)
200 if (!r_render.integer)
203 // y is weird beause OpenGL is bottom to top, we use top to bottom
204 qglViewport(x, vid.realheight - (y + height), width, height);
208 void GL_SetupView_Orientation_Identity (void)
210 Matrix4x4_CreateIdentity(&backend_viewmatrix);
211 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
214 void GL_SetupView_Orientation_FromEntity (vec3_t origin, vec3_t angles)
216 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
217 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
218 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
219 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
220 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
221 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
222 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
225 void GL_SetupView_Mode_Perspective (double fovx, double fovy, double zNear, double zFar)
229 if (!r_render.integer)
233 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
234 qglLoadIdentity ();CHECKGLERROR
236 xmax = zNear * tan(fovx * M_PI / 360.0);
237 ymax = zNear * tan(fovy * M_PI / 360.0);
239 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
240 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
241 GL_SetupView_Orientation_Identity();
244 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
248 if (!r_render.integer)
252 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
253 qglLoadIdentity ();CHECKGLERROR
255 nudge = 1.0 - 1.0 / (1<<23);
256 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
261 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
270 m[14] = -2 * zNear * nudge;
273 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
274 GL_SetupView_Orientation_Identity();
277 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
279 if (!r_render.integer)
283 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
284 qglLoadIdentity ();CHECKGLERROR
285 qglOrtho(x1, x2, y2, y1, zNear, zFar);
286 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
287 GL_SetupView_Orientation_Identity();
290 typedef struct gltextureunit_s
292 unsigned int t1d, t2d, t3d, tcubemap;
293 unsigned int arrayenabled;
295 int combinergb, combinealpha;
296 // FIXME: add more combine stuff
309 gltextureunit_t units[MAX_TEXTUREUNITS];
314 void GL_SetupTextureState(void)
317 gltextureunit_t *unit;
318 for (i = 0;i < backendunits;i++)
320 if (qglActiveTexture)
321 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
322 if (qglClientActiveTexture)
323 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
324 unit = gl_state.units + i;
330 unit->combinergb = GL_MODULATE;
331 unit->combinealpha = GL_MODULATE;
332 unit->arrayenabled = false;
333 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
336 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
340 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
342 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
343 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
346 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
348 if (gl_texturecubemap)
350 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
352 if (gl_combine.integer)
354 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
355 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
356 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
357 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
358 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);CHECKGLERROR
359 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
360 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
361 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
362 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
363 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
364 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
365 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
366 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
367 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
368 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
369 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
370 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
374 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
379 void GL_Backend_ResetState(void)
381 memset(&gl_state, 0, sizeof(gl_state));
382 gl_state.depthdisable = false;
383 gl_state.blendfunc1 = GL_ONE;
384 gl_state.blendfunc2 = GL_ZERO;
385 gl_state.blend = false;
386 gl_state.depthmask = GL_TRUE;
387 gl_state.colorarray = false;
389 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
390 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
392 qglEnable(GL_CULL_FACE);CHECKGLERROR
393 qglCullFace(GL_FRONT);CHECKGLERROR
394 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
395 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
396 qglDisable(GL_BLEND);CHECKGLERROR
397 qglDepthMask(gl_state.depthmask);CHECKGLERROR
398 qglVertexPointer(3, GL_FLOAT, sizeof(float[4]), varray_vertex);CHECKGLERROR
399 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
400 if (gl_mesh_floatcolors.integer)
402 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), varray_color);CHECKGLERROR
406 qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(qbyte[4]), varray_bcolor);CHECKGLERROR
408 GL_Color(1, 1, 1, 1);
410 GL_SetupTextureState();
413 void GL_UseColorArray(void)
415 if (!gl_state.colorarray)
417 gl_state.colorarray = true;
418 qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
422 void GL_Color(float cr, float cg, float cb, float ca)
424 if (gl_state.colorarray)
426 gl_state.colorarray = false;
427 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
429 qglColor4f(cr, cg, cb, ca);
432 // called at beginning of frame
433 void R_Mesh_Start(void)
439 GL_Backend_CheckCvars();
440 if (mesh_maxverts != gl_mesh_maxverts.integer)
441 GL_Backend_ResizeArrays(gl_mesh_maxverts.integer);
443 GL_Backend_ResetState();
446 int gl_backend_rebindtextures;
448 void GL_ConvertColorsFloatToByte(int numverts)
451 // LordHavoc: to avoid problems with aliasing (treating memory as two
452 // different types - exactly what this is doing), these must be volatile
454 volatile int *icolor;
455 volatile float *fcolor;
458 total = numverts * 4;
460 // shift float to have 8bit fraction at base of number
461 fcolor = varray_color;
462 for (i = 0;i < total;)
464 fcolor[i ] += 32768.0f;
465 fcolor[i + 1] += 32768.0f;
466 fcolor[i + 2] += 32768.0f;
467 fcolor[i + 3] += 32768.0f;
471 // then read as integer and kill float bits...
472 icolor = (int *)varray_color;
473 bcolor = varray_bcolor;
474 for (i = 0;i < total;)
476 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
477 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
478 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
479 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
484 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, const int *index)
486 int arraylocked = false;
488 c_meshelements += indexcount;
489 if (indexcount == 0 || endvert == firstvert)
491 Con_Printf("GL_DrawRangeElements(%d, %d, %d, %08p);\n", firstvert, endvert, indexcount, index);
494 if (gl_supportslockarrays && gl_lockarrays.integer)
496 qglLockArraysEXT(firstvert, endvert - firstvert);
500 if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
501 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, (const GLuint *) index);
503 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, (const GLuint *) index);
507 qglUnlockArraysEXT();
513 // enlarges geometry buffers if they are too small
514 void _R_Mesh_ResizeCheck(int numverts)
516 if (numverts > mesh_maxverts)
519 GL_Backend_ResizeArrays(numverts + 100);
520 GL_Backend_ResetState();
525 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
531 if (gl_state.colorarray && !gl_mesh_floatcolors.integer)
532 GL_ConvertColorsFloatToByte(numverts);
533 if (!r_render.integer)
535 GL_DrawRangeElements(0, numverts, numtriangles * 3, elements);
538 // restores backend state, used when done with 3D rendering
539 void R_Mesh_Finish(void)
544 for (i = backendunits - 1;i >= 0;i--)
546 if (qglActiveTexture)
547 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
548 if (qglClientActiveTexture)
549 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
550 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
551 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
552 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
555 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
557 if (gl_texturecubemap)
559 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
561 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
562 if (gl_combine.integer)
564 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
567 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
568 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
570 qglDisable(GL_BLEND);CHECKGLERROR
571 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
572 qglDepthMask(GL_TRUE);CHECKGLERROR
573 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
576 void R_Mesh_Matrix(const matrix4x4_t *matrix)
578 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
580 backend_modelmatrix = *matrix;
581 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
582 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
583 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
587 // sets up the requested state
588 void R_Mesh_MainState(const rmeshstate_t *m)
592 if (gl_state.blendfunc1 != m->blendfunc1 || gl_state.blendfunc2 != m->blendfunc2)
594 qglBlendFunc(gl_state.blendfunc1 = m->blendfunc1, gl_state.blendfunc2 = m->blendfunc2);CHECKGLERROR
595 if (gl_state.blendfunc2 == GL_ZERO)
597 if (gl_state.blendfunc1 == GL_ONE)
602 qglDisable(GL_BLEND);CHECKGLERROR
610 qglEnable(GL_BLEND);CHECKGLERROR
619 qglEnable(GL_BLEND);CHECKGLERROR
623 if (gl_state.depthdisable != m->depthdisable)
625 gl_state.depthdisable = m->depthdisable;
626 if (gl_state.depthdisable)
627 qglDisable(GL_DEPTH_TEST);
629 qglEnable(GL_DEPTH_TEST);
631 if (gl_state.depthmask != (m->blendfunc2 == GL_ZERO || m->depthwrite))
633 qglDepthMask(gl_state.depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite));CHECKGLERROR
637 void R_Mesh_TextureState(const rmeshstate_t *m)
639 int i, combinergb, combinealpha;
641 gltextureunit_t *unit;
645 if (gl_backend_rebindtextures)
647 gl_backend_rebindtextures = false;
648 GL_SetupTextureState();
651 for (i = 0;i < backendunits;i++)
653 unit = gl_state.units + i;
654 if (unit->t1d != m->tex1d[i] || unit->t2d != m->tex[i] || unit->t3d != m->tex3d[i] || unit->tcubemap != m->texcubemap[i])
656 if (gl_state.unit != i)
658 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
660 if (m->tex1d[i] || m->tex[i] || m->tex3d[i] || m->texcubemap[i])
662 if (!unit->arrayenabled)
664 unit->arrayenabled = true;
665 if (gl_state.clientunit != i)
667 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
669 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
674 if (unit->arrayenabled)
676 unit->arrayenabled = false;
677 if (gl_state.clientunit != i)
679 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
681 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
684 combinergb = m->texcombinergb[i];
685 combinealpha = m->texcombinealpha[i];
687 combinergb = GL_MODULATE;
689 combinealpha = GL_MODULATE;
690 if (unit->combinergb != combinergb)
692 unit->combinergb = combinergb;
693 if (gl_combine.integer)
695 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
699 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
702 if (unit->combinealpha != combinealpha)
704 unit->combinealpha = combinealpha;
705 if (gl_combine.integer)
707 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
710 if (unit->t1d != m->tex1d[i])
715 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
720 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
722 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
724 if (unit->t2d != m->tex[i])
729 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
734 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
736 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
738 if (unit->t3d != m->tex3d[i])
743 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
748 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
750 qglBindTexture(GL_TEXTURE_3D, (unit->t3d = m->tex3d[i]));CHECKGLERROR
752 if (unit->tcubemap != m->texcubemap[i])
754 if (m->texcubemap[i])
756 if (unit->tcubemap == 0)
757 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
762 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
764 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
767 rgbscale = max(m->texrgbscale[i], 1);
768 if (gl_state.units[i].rgbscale != rgbscale)
770 if (gl_state.unit != i)
772 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
774 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (gl_state.units[i].rgbscale = rgbscale));CHECKGLERROR
779 void R_Mesh_State(const rmeshstate_t *m)
782 R_Mesh_TextureState(m);
786 ==============================================================================
790 ==============================================================================
793 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
799 if (!r_render.integer)
802 buffer = Mem_Alloc(tempmempool, width*height*3);
803 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
806 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
807 if (v_hwgamma.integer)
808 for (i = 0;i < width * height * 3;i++)
809 buffer[i] <<= v_overbrightbits.integer;
811 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
817 //=============================================================================
819 void R_ClearScreen(void)
821 if (r_render.integer)
824 qglClearColor(0,0,0,0);CHECKGLERROR
826 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);CHECKGLERROR
827 // set dithering mode
828 if (gl_dither.integer)
830 qglEnable(GL_DITHER);CHECKGLERROR
834 qglDisable(GL_DITHER);CHECKGLERROR
843 This is called every frame, and can also be called explicitly to flush
847 void SCR_UpdateScreen (void)
851 R_TimeReport("finish");
853 if (r_textureunits.integer > gl_textureunits)
854 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
855 if (r_textureunits.integer < 1)
856 Cvar_SetValueQuick(&r_textureunits, 1);
858 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
859 Cvar_SetValueQuick(&gl_combine, 0);
862 r_colorscale = 1.0f / (float) (1 << v_overbrightbits.integer);
865 r_lightmapscalebit = v_overbrightbits.integer;
866 if (gl_combine.integer && r_textureunits.integer > 1)
867 r_lightmapscalebit += 2;
869 R_TimeReport("setup");
873 R_TimeReport("clear");
875 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
881 // tell driver to commit it's partially full geometry queue to the rendering queue
882 // (this doesn't wait for the commands themselves to complete)