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;
294 float rgbscale, alphascale;
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->alphascale = 1;
331 unit->combinergb = GL_MODULATE;
332 unit->combinealpha = GL_MODULATE;
333 unit->arrayenabled = false;
334 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
337 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
341 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
343 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
344 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
347 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
349 if (gl_texturecubemap)
351 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
353 if (gl_combine.integer)
355 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
356 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
357 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
358 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
359 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);CHECKGLERROR
360 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
361 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
362 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
363 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
364 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
365 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
366 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
367 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
368 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
369 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
370 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
371 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
375 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
380 void GL_Backend_ResetState(void)
382 memset(&gl_state, 0, sizeof(gl_state));
383 gl_state.depthdisable = false;
384 gl_state.blendfunc1 = GL_ONE;
385 gl_state.blendfunc2 = GL_ZERO;
386 gl_state.blend = false;
387 gl_state.depthmask = GL_TRUE;
388 gl_state.colorarray = false;
390 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
391 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
393 qglEnable(GL_CULL_FACE);CHECKGLERROR
394 qglCullFace(GL_FRONT);CHECKGLERROR
395 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
396 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
397 qglDisable(GL_BLEND);CHECKGLERROR
398 qglDepthMask(gl_state.depthmask);CHECKGLERROR
399 qglVertexPointer(3, GL_FLOAT, sizeof(float[4]), varray_vertex);CHECKGLERROR
400 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
401 if (gl_mesh_floatcolors.integer)
403 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), varray_color);CHECKGLERROR
407 qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(qbyte[4]), varray_bcolor);CHECKGLERROR
409 GL_Color(1, 1, 1, 1);
411 GL_SetupTextureState();
414 void GL_UseColorArray(void)
416 if (!gl_state.colorarray)
418 gl_state.colorarray = true;
419 qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
423 void GL_Color(float cr, float cg, float cb, float ca)
425 if (gl_state.colorarray)
427 gl_state.colorarray = false;
428 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
430 qglColor4f(cr, cg, cb, ca);
433 // called at beginning of frame
434 void R_Mesh_Start(void)
440 GL_Backend_CheckCvars();
441 if (mesh_maxverts != gl_mesh_maxverts.integer)
442 GL_Backend_ResizeArrays(gl_mesh_maxverts.integer);
444 GL_Backend_ResetState();
447 int gl_backend_rebindtextures;
449 void GL_ConvertColorsFloatToByte(int numverts)
452 // LordHavoc: to avoid problems with aliasing (treating memory as two
453 // different types - exactly what this is doing), these must be volatile
455 volatile int *icolor;
456 volatile float *fcolor;
459 total = numverts * 4;
461 // shift float to have 8bit fraction at base of number
462 fcolor = varray_color;
463 for (i = 0;i < total;)
465 fcolor[i ] += 32768.0f;
466 fcolor[i + 1] += 32768.0f;
467 fcolor[i + 2] += 32768.0f;
468 fcolor[i + 3] += 32768.0f;
472 // then read as integer and kill float bits...
473 icolor = (int *)varray_color;
474 bcolor = varray_bcolor;
475 for (i = 0;i < total;)
477 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
478 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
479 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
480 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
485 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, const int *index)
487 int arraylocked = false;
489 c_meshelements += indexcount;
490 if (indexcount == 0 || endvert == firstvert)
492 Con_Printf("GL_DrawRangeElements(%d, %d, %d, %08p);\n", firstvert, endvert, indexcount, index);
495 if (gl_supportslockarrays && gl_lockarrays.integer)
497 qglLockArraysEXT(firstvert, endvert - firstvert);
501 if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
502 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, (const GLuint *) index);
504 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, (const GLuint *) index);
508 qglUnlockArraysEXT();
514 // enlarges geometry buffers if they are too small
515 void _R_Mesh_ResizeCheck(int numverts)
517 if (numverts > mesh_maxverts)
520 GL_Backend_ResizeArrays(numverts + 100);
521 GL_Backend_ResetState();
526 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
532 if (gl_state.colorarray && !gl_mesh_floatcolors.integer)
533 GL_ConvertColorsFloatToByte(numverts);
534 if (!r_render.integer)
536 GL_DrawRangeElements(0, numverts, numtriangles * 3, elements);
539 // restores backend state, used when done with 3D rendering
540 void R_Mesh_Finish(void)
545 for (i = backendunits - 1;i >= 0;i--)
547 if (qglActiveTexture)
548 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
549 if (qglClientActiveTexture)
550 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
551 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
552 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
553 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
556 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
558 if (gl_texturecubemap)
560 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
562 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
563 if (gl_combine.integer)
565 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
566 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
569 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
570 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
572 qglDisable(GL_BLEND);CHECKGLERROR
573 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
574 qglDepthMask(GL_TRUE);CHECKGLERROR
575 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
578 void R_Mesh_Matrix(const matrix4x4_t *matrix)
580 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
582 backend_modelmatrix = *matrix;
583 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
584 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
585 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
589 // sets up the requested state
590 void R_Mesh_MainState(const rmeshstate_t *m)
594 if (gl_state.blendfunc1 != m->blendfunc1 || gl_state.blendfunc2 != m->blendfunc2)
596 qglBlendFunc(gl_state.blendfunc1 = m->blendfunc1, gl_state.blendfunc2 = m->blendfunc2);CHECKGLERROR
597 if (gl_state.blendfunc2 == GL_ZERO)
599 if (gl_state.blendfunc1 == GL_ONE)
604 qglDisable(GL_BLEND);CHECKGLERROR
612 qglEnable(GL_BLEND);CHECKGLERROR
621 qglEnable(GL_BLEND);CHECKGLERROR
625 if (gl_state.depthdisable != m->depthdisable)
627 gl_state.depthdisable = m->depthdisable;
628 if (gl_state.depthdisable)
629 qglDisable(GL_DEPTH_TEST);
631 qglEnable(GL_DEPTH_TEST);
633 if (gl_state.depthmask != (m->blendfunc2 == GL_ZERO || m->depthwrite))
635 qglDepthMask(gl_state.depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite));CHECKGLERROR
639 void R_Mesh_TextureState(const rmeshstate_t *m)
641 int i, combinergb, combinealpha;
643 gltextureunit_t *unit;
647 if (gl_backend_rebindtextures)
649 gl_backend_rebindtextures = false;
650 GL_SetupTextureState();
653 for (i = 0;i < backendunits;i++)
655 unit = gl_state.units + i;
656 if (unit->t1d != m->tex1d[i] || unit->t2d != m->tex[i] || unit->t3d != m->tex3d[i] || unit->tcubemap != m->texcubemap[i])
658 if (gl_state.unit != i)
660 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
662 if (m->tex1d[i] || m->tex[i] || m->tex3d[i] || m->texcubemap[i])
664 if (!unit->arrayenabled)
666 unit->arrayenabled = true;
667 if (gl_state.clientunit != i)
669 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
671 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
676 if (unit->arrayenabled)
678 unit->arrayenabled = false;
679 if (gl_state.clientunit != i)
681 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
683 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
686 combinergb = m->texcombinergb[i];
687 combinealpha = m->texcombinealpha[i];
689 combinergb = GL_MODULATE;
691 combinealpha = GL_MODULATE;
692 if (unit->combinergb != combinergb)
694 unit->combinergb = combinergb;
695 if (gl_combine.integer)
697 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
701 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
704 if (unit->combinealpha != combinealpha)
706 unit->combinealpha = combinealpha;
707 if (gl_combine.integer)
709 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
712 if (unit->t1d != m->tex1d[i])
717 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
722 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
724 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
726 if (unit->t2d != m->tex[i])
731 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
736 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
738 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
740 if (unit->t3d != m->tex3d[i])
745 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
750 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
752 qglBindTexture(GL_TEXTURE_3D, (unit->t3d = m->tex3d[i]));CHECKGLERROR
754 if (unit->tcubemap != m->texcubemap[i])
756 if (m->texcubemap[i])
758 if (unit->tcubemap == 0)
759 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
764 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
766 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
769 scale = max(m->texrgbscale[i], 1);
770 if (gl_state.units[i].rgbscale != scale)
772 if (gl_state.unit != i)
774 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
776 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (gl_state.units[i].rgbscale = scale));CHECKGLERROR
778 scale = max(m->texalphascale[i], 1);
779 if (gl_state.units[i].alphascale != scale)
781 if (gl_state.unit != i)
783 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
785 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (gl_state.units[i].alphascale = scale));CHECKGLERROR
790 void R_Mesh_State(const rmeshstate_t *m)
793 R_Mesh_TextureState(m);
797 ==============================================================================
801 ==============================================================================
804 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
810 if (!r_render.integer)
813 buffer = Mem_Alloc(tempmempool, width*height*3);
814 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
817 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
818 if (v_hwgamma.integer)
819 for (i = 0;i < width * height * 3;i++)
820 buffer[i] <<= v_overbrightbits.integer;
822 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
828 //=============================================================================
830 void R_ClearScreen(void)
832 if (r_render.integer)
835 qglClearColor(0,0,0,0);CHECKGLERROR
837 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));CHECKGLERROR
838 // set dithering mode
839 if (gl_dither.integer)
841 qglEnable(GL_DITHER);CHECKGLERROR
845 qglDisable(GL_DITHER);CHECKGLERROR
854 This is called every frame, and can also be called explicitly to flush
858 void SCR_UpdateScreen (void)
862 R_TimeReport("finish");
864 if (r_textureunits.integer > gl_textureunits)
865 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
866 if (r_textureunits.integer < 1)
867 Cvar_SetValueQuick(&r_textureunits, 1);
869 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
870 Cvar_SetValueQuick(&gl_combine, 0);
873 r_colorscale = 1.0f / (float) (1 << v_overbrightbits.integer);
876 r_lightmapscalebit = v_overbrightbits.integer;
877 if (gl_combine.integer && r_textureunits.integer > 1)
878 r_lightmapscalebit += 2;
880 R_TimeReport("setup");
884 R_TimeReport("clear");
886 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
892 // tell driver to commit it's partially full geometry queue to the rendering queue
893 // (this doesn't wait for the commands themselves to complete)