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_drawrangeelements = {0, "gl_mesh_drawrangeelements", "1"};
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");
66 int c_meshs, c_meshelements;
68 void SCR_ScreenShot_f (void);
70 // these are externally accessible
71 int r_lightmapscalebit;
75 float *varray_texcoord[MAX_TEXTUREUNITS];
78 static matrix4x4_t backend_viewmatrix;
79 static matrix4x4_t backend_modelmatrix;
80 static matrix4x4_t backend_modelviewmatrix;
81 static matrix4x4_t backend_glmodelviewmatrix;
83 static int backendunits, backendactive;
84 static qbyte *varray_bcolor;
85 static mempool_t *gl_backend_mempool;
87 int polygonelements[768];
89 void GL_Backend_AllocArrays(void)
93 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
95 polygonelements[i * 3 + 0] = 0;
96 polygonelements[i * 3 + 1] = i + 1;
97 polygonelements[i * 3 + 2] = i + 2;
100 if (!gl_backend_mempool)
101 gl_backend_mempool = Mem_AllocPool("GL_Backend");
103 varray_vertex = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
104 varray_color = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
105 varray_bcolor = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(qbyte[4]));
106 for (i = 0;i < backendunits;i++)
107 varray_texcoord[i] = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
108 for (;i < MAX_TEXTUREUNITS;i++)
109 varray_texcoord[i] = NULL;
112 void GL_Backend_FreeArrays(int resizingbuffers)
116 Mem_EmptyPool(gl_backend_mempool);
118 Mem_FreePool(&gl_backend_mempool);
119 varray_vertex = NULL;
121 varray_bcolor = NULL;
122 for (i = 0;i < MAX_TEXTUREUNITS;i++)
123 varray_texcoord[i] = NULL;
126 static void gl_backend_start(void)
128 Con_Printf("OpenGL Backend started with gl_mesh_maxverts %i\n", gl_mesh_maxverts.integer);
129 if (qglDrawRangeElements != NULL)
131 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
132 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
134 Con_Printf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
136 if (strstr(gl_renderer, "3Dfx"))
138 Con_Printf("3Dfx driver detected, forcing gl_mesh_floatcolors to 0 to prevent crashs\n");
139 Cvar_SetValueQuick(&gl_mesh_floatcolors, 0);
142 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
144 GL_Backend_AllocArrays();
146 backendactive = true;
149 static void gl_backend_shutdown(void)
152 backendactive = false;
154 Con_Printf("OpenGL Backend shutting down\n");
156 GL_Backend_FreeArrays(false);
159 void GL_Backend_CheckCvars(void)
161 // 21760 is (65536 / 3) rounded off to a multiple of 128
162 if (gl_mesh_maxverts.integer < 1024)
163 Cvar_SetValueQuick(&gl_mesh_maxverts, 1024);
164 if (gl_mesh_maxverts.integer > 21760)
165 Cvar_SetValueQuick(&gl_mesh_maxverts, 21760);
168 void GL_Backend_ResizeArrays(int numtriangles)
170 Cvar_SetValueQuick(&gl_mesh_maxverts, numtriangles);
171 GL_Backend_CheckCvars();
172 mesh_maxverts = gl_mesh_maxverts.integer;
173 GL_Backend_FreeArrays(true);
174 GL_Backend_AllocArrays();
177 static void gl_backend_newmap(void)
181 void gl_backend_init(void)
183 Cvar_RegisterVariable(&r_render);
184 Cvar_RegisterVariable(&gl_dither);
185 Cvar_RegisterVariable(&gl_lockarrays);
187 Cvar_SetValue("r_render", 0);
190 Cvar_RegisterVariable(&gl_mesh_maxverts);
191 Cvar_RegisterVariable(&gl_mesh_floatcolors);
192 Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
193 GL_Backend_CheckCvars();
194 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
197 void GL_SetupView_ViewPort (int x, int y, int width, int height)
199 if (!r_render.integer)
202 // y is weird beause OpenGL is bottom to top, we use top to bottom
203 qglViewport(x, vid.realheight - (y + height), width, height);
207 void GL_SetupView_Orientation_Identity (void)
209 Matrix4x4_CreateIdentity(&backend_viewmatrix);
210 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
213 void GL_SetupView_Orientation_FromEntity (vec3_t origin, vec3_t angles)
215 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
216 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
217 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
218 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
219 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
220 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
221 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
224 void GL_SetupView_Mode_Perspective (double aspect, double fovx, double fovy, double zNear, double zFar)
228 if (!r_render.integer)
232 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
233 qglLoadIdentity ();CHECKGLERROR
235 xmax = zNear * tan(fovx * M_PI / 360.0);
236 ymax = zNear * tan(fovy * M_PI / 360.0);
238 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
239 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
240 GL_SetupView_Orientation_Identity();
243 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
245 if (!r_render.integer)
249 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
250 qglLoadIdentity ();CHECKGLERROR
251 qglOrtho(x1, x2, y2, y1, zNear, zFar);
252 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
253 GL_SetupView_Orientation_Identity();
256 typedef struct gltextureunit_s
258 unsigned int t1d, t2d, t3d, tcubemap;
259 unsigned int arrayenabled;
261 // FIXME: add more combine stuff
274 gltextureunit_t units[MAX_TEXTUREUNITS];
279 void GL_SetupTextureState(void)
282 gltextureunit_t *unit;
283 for (i = 0;i < backendunits;i++)
285 if (qglActiveTexture)
286 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
287 if (qglClientActiveTexture)
288 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
289 unit = gl_state.units + i;
295 unit->arrayenabled = false;
296 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
298 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
300 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
301 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
302 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
305 qglDisable(GL_TEXTURE_3D_EXT);CHECKGLERROR
307 if (gl_texturecubemap)
309 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);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, 1);CHECKGLERROR
329 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
333 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
338 void GL_Backend_ResetState(void)
340 memset(&gl_state, 0, sizeof(gl_state));
341 gl_state.depthdisable = false;
342 gl_state.blendfunc1 = GL_ONE;
343 gl_state.blendfunc2 = GL_ZERO;
344 gl_state.blend = false;
345 gl_state.depthmask = GL_TRUE;
346 gl_state.colorarray = false;
348 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
349 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
351 qglEnable(GL_CULL_FACE);CHECKGLERROR
352 qglCullFace(GL_FRONT);CHECKGLERROR
353 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
354 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
355 qglDisable(GL_BLEND);CHECKGLERROR
356 qglDepthMask(gl_state.depthmask);CHECKGLERROR
357 qglVertexPointer(3, GL_FLOAT, sizeof(float[4]), varray_vertex);CHECKGLERROR
358 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
359 if (gl_mesh_floatcolors.integer)
361 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), varray_color);CHECKGLERROR
365 qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(qbyte[4]), varray_bcolor);CHECKGLERROR
367 GL_Color(1, 1, 1, 1);
369 GL_SetupTextureState();
372 void GL_UseColorArray(void)
374 if (!gl_state.colorarray)
376 gl_state.colorarray = true;
377 qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
381 void GL_Color(float cr, float cg, float cb, float ca)
383 if (gl_state.colorarray)
385 gl_state.colorarray = false;
386 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
388 qglColor4f(cr, cg, cb, ca);
391 // called at beginning of frame
392 void R_Mesh_Start(void)
398 GL_Backend_CheckCvars();
399 if (mesh_maxverts != gl_mesh_maxverts.integer)
400 GL_Backend_ResizeArrays(gl_mesh_maxverts.integer);
402 GL_Backend_ResetState();
405 int gl_backend_rebindtextures;
407 void GL_ConvertColorsFloatToByte(int numverts)
410 // LordHavoc: to avoid problems with aliasing (treating memory as two
411 // different types - exactly what this is doing), these must be volatile
413 volatile int *icolor;
414 volatile float *fcolor;
417 total = numverts * 4;
419 // shift float to have 8bit fraction at base of number
420 fcolor = varray_color;
421 for (i = 0;i < total;)
423 fcolor[i ] += 32768.0f;
424 fcolor[i + 1] += 32768.0f;
425 fcolor[i + 2] += 32768.0f;
426 fcolor[i + 3] += 32768.0f;
430 // then read as integer and kill float bits...
431 icolor = (int *)varray_color;
432 bcolor = varray_bcolor;
433 for (i = 0;i < total;)
435 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
436 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
437 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
438 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
443 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, int *index)
445 int arraylocked = false;
447 c_meshelements += indexcount;
448 if (gl_supportslockarrays && gl_lockarrays.integer)
450 qglLockArraysEXT(firstvert, endvert - firstvert);
454 if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
455 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, (GLuint *) index);
457 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, (GLuint *) index);
461 qglUnlockArraysEXT();
467 // enlarges geometry buffers if they are too small
468 void _R_Mesh_ResizeCheck(int numverts)
470 if (numverts > mesh_maxverts)
473 GL_Backend_ResizeArrays(numverts + 100);
474 GL_Backend_ResetState();
479 void R_Mesh_Draw(int numverts, int numtriangles, int *elements)
485 if (gl_state.colorarray && !gl_mesh_floatcolors.integer)
486 GL_ConvertColorsFloatToByte(numverts);
487 if (!r_render.integer)
489 GL_DrawRangeElements(0, numverts, numtriangles * 3, elements);
492 // restores backend state, used when done with 3D rendering
493 void R_Mesh_Finish(void)
498 for (i = backendunits - 1;i >= 0;i--)
500 if (qglActiveTexture)
501 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
502 if (qglClientActiveTexture)
503 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
504 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
505 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
506 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
509 qglDisable(GL_TEXTURE_3D_EXT);CHECKGLERROR
511 if (gl_texturecubemap)
513 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
515 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
516 if (gl_combine.integer)
518 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
521 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
522 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
524 qglDisable(GL_BLEND);CHECKGLERROR
525 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
526 qglDepthMask(GL_TRUE);CHECKGLERROR
527 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
530 void R_Mesh_Matrix(const matrix4x4_t *matrix)
532 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
534 backend_modelmatrix = *matrix;
535 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
536 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
537 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
541 // sets up the requested state
542 void R_Mesh_MainState(const rmeshstate_t *m)
546 if (gl_state.blendfunc1 != m->blendfunc1 || gl_state.blendfunc2 != m->blendfunc2)
548 qglBlendFunc(gl_state.blendfunc1 = m->blendfunc1, gl_state.blendfunc2 = m->blendfunc2);CHECKGLERROR
549 if (gl_state.blendfunc2 == GL_ZERO)
551 if (gl_state.blendfunc1 == GL_ONE)
556 qglDisable(GL_BLEND);CHECKGLERROR
564 qglEnable(GL_BLEND);CHECKGLERROR
573 qglEnable(GL_BLEND);CHECKGLERROR
577 if (gl_state.depthdisable != m->depthdisable)
579 gl_state.depthdisable = m->depthdisable;
580 if (gl_state.depthdisable)
581 qglDisable(GL_DEPTH_TEST);
583 qglEnable(GL_DEPTH_TEST);
585 if (gl_state.depthmask != (m->blendfunc2 == GL_ZERO || m->depthwrite))
587 qglDepthMask(gl_state.depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite));CHECKGLERROR
591 void R_Mesh_TextureState(const rmeshstate_t *m)
595 gltextureunit_t *unit;
599 if (gl_backend_rebindtextures)
601 gl_backend_rebindtextures = false;
602 GL_SetupTextureState();
605 for (i = 0;i < backendunits;i++)
607 unit = gl_state.units + i;
608 if (unit->t1d != m->tex1d[i] || unit->t2d != m->tex[i] || unit->t3d != m->tex3d[i] || unit->tcubemap != m->texcubemap[i])
610 if (gl_state.unit != i)
612 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
614 if (m->tex1d[i] || m->tex[i] || m->tex3d[i] || m->texcubemap[i])
616 if (!unit->arrayenabled)
618 unit->arrayenabled = true;
619 if (gl_state.clientunit != i)
621 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
623 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
628 if (unit->arrayenabled)
630 unit->arrayenabled = false;
631 if (gl_state.clientunit != i)
633 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
635 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
638 if (unit->t1d != m->tex1d[i])
643 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
648 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
650 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
652 if (unit->t2d != m->tex[i])
657 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
662 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
664 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
666 if (unit->t3d != m->tex3d[i])
671 qglEnable(GL_TEXTURE_3D_EXT);CHECKGLERROR
676 qglDisable(GL_TEXTURE_3D_EXT);CHECKGLERROR
678 qglBindTexture(GL_TEXTURE_3D_EXT, (unit->t3d = m->tex3d[i]));CHECKGLERROR
680 if (unit->tcubemap != m->texcubemap[i])
682 if (m->texcubemap[i])
684 if (unit->tcubemap == 0)
685 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
690 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
692 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
695 rgbscale = max(m->texrgbscale[i], 1);
696 if (gl_state.units[i].rgbscale != rgbscale)
698 if (gl_state.unit != i)
700 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
702 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (gl_state.units[i].rgbscale = rgbscale));CHECKGLERROR
707 void R_Mesh_State(const rmeshstate_t *m)
710 R_Mesh_TextureState(m);
714 ==============================================================================
718 ==============================================================================
721 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
727 if (!r_render.integer)
730 buffer = Mem_Alloc(tempmempool, width*height*3);
731 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
734 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
735 if (v_hwgamma.integer)
736 for (i = 0;i < width * height * 3;i++)
737 buffer[i] <<= v_overbrightbits.integer;
739 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
745 //=============================================================================
747 void R_ClearScreen(void)
749 if (r_render.integer)
752 qglClearColor(0,0,0,0);CHECKGLERROR
754 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);CHECKGLERROR
755 // set dithering mode
756 if (gl_dither.integer)
758 qglEnable(GL_DITHER);CHECKGLERROR
762 qglDisable(GL_DITHER);CHECKGLERROR
771 This is called every frame, and can also be called explicitly to flush
775 void SCR_UpdateScreen (void)
779 R_TimeReport("finish");
781 if (r_textureunits.integer > gl_textureunits)
782 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
783 if (r_textureunits.integer < 1)
784 Cvar_SetValueQuick(&r_textureunits, 1);
786 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
787 Cvar_SetValueQuick(&gl_combine, 0);
790 r_colorscale = 1.0f / (float) (1 << v_overbrightbits.integer);
793 r_lightmapscalebit = v_overbrightbits.integer;
794 if (gl_combine.integer && r_textureunits.integer > 1)
795 r_lightmapscalebit += 2;
797 R_TimeReport("setup");
801 R_TimeReport("clear");
803 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
809 // tell driver to commit it's partially full geometry queue to the rendering queue
810 // (this doesn't wait for the commands themselves to complete)