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;
89 note: here's strip order for a terrain row:
95 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
97 *elements++ = i + row;
99 *elements++ = i + row + 1;
102 *elements++ = i + row + 1;
105 int polygonelements[768];
107 void GL_Backend_AllocArrays(void)
111 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
113 polygonelements[i * 3 + 0] = 0;
114 polygonelements[i * 3 + 1] = i + 1;
115 polygonelements[i * 3 + 2] = i + 2;
118 if (!gl_backend_mempool)
119 gl_backend_mempool = Mem_AllocPool("GL_Backend");
121 varray_vertex = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
122 varray_color = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
123 varray_bcolor = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(qbyte[4]));
124 for (i = 0;i < backendunits;i++)
125 varray_texcoord[i] = Mem_Alloc(gl_backend_mempool, mesh_maxverts * sizeof(float[4]));
126 for (;i < MAX_TEXTUREUNITS;i++)
127 varray_texcoord[i] = NULL;
130 void GL_Backend_FreeArrays(int resizingbuffers)
134 Mem_EmptyPool(gl_backend_mempool);
136 Mem_FreePool(&gl_backend_mempool);
137 varray_vertex = NULL;
139 varray_bcolor = NULL;
140 for (i = 0;i < MAX_TEXTUREUNITS;i++)
141 varray_texcoord[i] = NULL;
144 static void gl_backend_start(void)
146 Con_Printf("OpenGL Backend started with gl_mesh_maxverts %i\n", gl_mesh_maxverts.integer);
147 if (qglDrawRangeElements != NULL)
149 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
150 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
152 Con_Printf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
154 if (strstr(gl_renderer, "3Dfx"))
156 Con_Printf("3Dfx driver detected, forcing gl_mesh_floatcolors to 0 to prevent crashs\n");
157 Cvar_SetValueQuick(&gl_mesh_floatcolors, 0);
160 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
162 GL_Backend_AllocArrays();
164 backendactive = true;
167 static void gl_backend_shutdown(void)
170 backendactive = false;
172 Con_Printf("OpenGL Backend shutting down\n");
174 GL_Backend_FreeArrays(false);
177 void GL_Backend_CheckCvars(void)
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_drawrangeelements);
211 GL_Backend_CheckCvars();
212 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
215 void GL_SetupView_ViewPort (int x, int y, int width, int height)
217 if (!r_render.integer)
220 // y is weird beause OpenGL is bottom to top, we use top to bottom
221 qglViewport(x, vid.realheight - (y + height), width, height);
225 void GL_SetupView_Orientation_Identity (void)
227 Matrix4x4_CreateIdentity(&backend_viewmatrix);
228 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
231 void GL_SetupView_Orientation_FromEntity (vec3_t origin, vec3_t angles)
233 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
234 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
235 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
236 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
237 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
238 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
239 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
242 void GL_SetupView_Mode_Perspective (double fovx, double fovy, double zNear, double zFar)
246 if (!r_render.integer)
250 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
251 qglLoadIdentity ();CHECKGLERROR
253 xmax = zNear * tan(fovx * M_PI / 360.0);
254 ymax = zNear * tan(fovy * M_PI / 360.0);
256 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
257 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
258 GL_SetupView_Orientation_Identity();
261 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
265 if (!r_render.integer)
269 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
270 qglLoadIdentity ();CHECKGLERROR
272 nudge = 1.0 - 1.0 / (1<<23);
273 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
278 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
287 m[14] = -2 * zNear * nudge;
290 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
291 GL_SetupView_Orientation_Identity();
294 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
296 if (!r_render.integer)
300 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
301 qglLoadIdentity ();CHECKGLERROR
302 qglOrtho(x1, x2, y2, y1, zNear, zFar);
303 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
304 GL_SetupView_Orientation_Identity();
307 typedef struct gltextureunit_s
309 unsigned int t1d, t2d, t3d, tcubemap;
310 unsigned int arrayenabled;
311 float rgbscale, alphascale;
312 int combinergb, combinealpha;
313 // FIXME: add more combine stuff
326 gltextureunit_t units[MAX_TEXTUREUNITS];
331 void GL_SetupTextureState(void)
334 gltextureunit_t *unit;
335 for (i = 0;i < backendunits;i++)
337 if (qglActiveTexture)
338 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
339 if (qglClientActiveTexture)
340 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
341 unit = gl_state.units + i;
347 unit->alphascale = 1;
348 unit->combinergb = GL_MODULATE;
349 unit->combinealpha = GL_MODULATE;
350 unit->arrayenabled = false;
351 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
354 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
358 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[4]), varray_texcoord[i]);CHECKGLERROR
360 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
361 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
364 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
366 if (gl_texturecubemap)
368 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
370 if (gl_combine.integer)
372 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
373 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
374 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
375 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
376 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);CHECKGLERROR
377 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
378 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
379 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
380 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
381 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
382 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
383 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
384 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
385 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
386 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
387 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
388 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
392 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
397 void GL_Backend_ResetState(void)
399 memset(&gl_state, 0, sizeof(gl_state));
400 gl_state.depthdisable = false;
401 gl_state.blendfunc1 = GL_ONE;
402 gl_state.blendfunc2 = GL_ZERO;
403 gl_state.blend = false;
404 gl_state.depthmask = GL_TRUE;
405 gl_state.colorarray = false;
407 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
408 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
410 qglEnable(GL_CULL_FACE);CHECKGLERROR
411 qglCullFace(GL_FRONT);CHECKGLERROR
412 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
413 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
414 qglDisable(GL_BLEND);CHECKGLERROR
415 qglDepthMask(gl_state.depthmask);CHECKGLERROR
416 qglVertexPointer(3, GL_FLOAT, sizeof(float[4]), varray_vertex);CHECKGLERROR
417 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
418 if (gl_mesh_floatcolors.integer)
420 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), varray_color);CHECKGLERROR
424 qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(qbyte[4]), varray_bcolor);CHECKGLERROR
426 GL_Color(1, 1, 1, 1);
428 GL_SetupTextureState();
431 void GL_UseColorArray(void)
433 if (!gl_state.colorarray)
435 gl_state.colorarray = true;
436 qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
440 void GL_Color(float cr, float cg, float cb, float ca)
442 if (gl_state.colorarray)
444 gl_state.colorarray = false;
445 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
447 qglColor4f(cr, cg, cb, ca);
450 // called at beginning of frame
451 void R_Mesh_Start(void)
457 GL_Backend_CheckCvars();
458 if (mesh_maxverts != gl_mesh_maxverts.integer)
459 GL_Backend_ResizeArrays(gl_mesh_maxverts.integer);
461 GL_Backend_ResetState();
464 int gl_backend_rebindtextures;
466 void GL_ConvertColorsFloatToByte(int numverts)
469 // LordHavoc: to avoid problems with aliasing (treating memory as two
470 // different types - exactly what this is doing), these must be volatile
472 volatile int *icolor;
473 volatile float *fcolor;
476 total = numverts * 4;
478 // shift float to have 8bit fraction at base of number
479 fcolor = varray_color;
480 for (i = 0;i < total;)
482 fcolor[i ] += 32768.0f;
483 fcolor[i + 1] += 32768.0f;
484 fcolor[i + 2] += 32768.0f;
485 fcolor[i + 3] += 32768.0f;
489 // then read as integer and kill float bits...
490 icolor = (int *)varray_color;
491 bcolor = varray_bcolor;
492 for (i = 0;i < total;)
494 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
495 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
496 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
497 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
502 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, const int *index)
504 int arraylocked = false;
506 c_meshelements += indexcount;
507 if (indexcount == 0 || endvert == firstvert)
509 Con_Printf("GL_DrawRangeElements(%d, %d, %d, %08p);\n", firstvert, endvert, indexcount, index);
512 if (gl_supportslockarrays && gl_lockarrays.integer)
514 qglLockArraysEXT(firstvert, endvert - firstvert);
518 if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
519 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, (const GLuint *) index);
521 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, (const GLuint *) index);
525 qglUnlockArraysEXT();
531 // enlarges geometry buffers if they are too small
532 void _R_Mesh_ResizeCheck(int numverts)
534 if (numverts > mesh_maxverts)
537 GL_Backend_ResizeArrays(numverts + 100);
538 GL_Backend_ResetState();
543 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
549 if (gl_state.colorarray && !gl_mesh_floatcolors.integer)
550 GL_ConvertColorsFloatToByte(numverts);
551 if (!r_render.integer)
553 GL_DrawRangeElements(0, numverts, numtriangles * 3, elements);
556 // restores backend state, used when done with 3D rendering
557 void R_Mesh_Finish(void)
562 for (i = backendunits - 1;i >= 0;i--)
564 if (qglActiveTexture)
565 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
566 if (qglClientActiveTexture)
567 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
568 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
569 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
570 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
573 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
575 if (gl_texturecubemap)
577 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
579 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
580 if (gl_combine.integer)
582 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
583 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
586 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
587 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
589 qglDisable(GL_BLEND);CHECKGLERROR
590 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
591 qglDepthMask(GL_TRUE);CHECKGLERROR
592 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
595 void R_Mesh_Matrix(const matrix4x4_t *matrix)
597 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
599 backend_modelmatrix = *matrix;
600 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
601 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
602 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
606 // sets up the requested state
607 void R_Mesh_MainState(const rmeshstate_t *m)
611 if (gl_state.blendfunc1 != m->blendfunc1 || gl_state.blendfunc2 != m->blendfunc2)
613 qglBlendFunc(gl_state.blendfunc1 = m->blendfunc1, gl_state.blendfunc2 = m->blendfunc2);CHECKGLERROR
614 if (gl_state.blendfunc2 == GL_ZERO)
616 if (gl_state.blendfunc1 == GL_ONE)
621 qglDisable(GL_BLEND);CHECKGLERROR
629 qglEnable(GL_BLEND);CHECKGLERROR
638 qglEnable(GL_BLEND);CHECKGLERROR
642 if (gl_state.depthdisable != m->depthdisable)
644 gl_state.depthdisable = m->depthdisable;
645 if (gl_state.depthdisable)
646 qglDisable(GL_DEPTH_TEST);
648 qglEnable(GL_DEPTH_TEST);
650 if (gl_state.depthmask != (m->blendfunc2 == GL_ZERO || m->depthwrite))
652 qglDepthMask(gl_state.depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite));CHECKGLERROR
656 void R_Mesh_TextureState(const rmeshstate_t *m)
658 int i, combinergb, combinealpha;
660 gltextureunit_t *unit;
664 if (gl_backend_rebindtextures)
666 gl_backend_rebindtextures = false;
667 GL_SetupTextureState();
670 for (i = 0;i < backendunits;i++)
672 unit = gl_state.units + i;
673 if (unit->t1d != m->tex1d[i] || unit->t2d != m->tex[i] || unit->t3d != m->tex3d[i] || unit->tcubemap != m->texcubemap[i])
675 if (gl_state.unit != i)
677 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
679 if (m->tex1d[i] || m->tex[i] || m->tex3d[i] || m->texcubemap[i])
681 if (!unit->arrayenabled)
683 unit->arrayenabled = true;
684 if (gl_state.clientunit != i)
686 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
688 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
693 if (unit->arrayenabled)
695 unit->arrayenabled = false;
696 if (gl_state.clientunit != i)
698 qglClientActiveTexture(GL_TEXTURE0_ARB + (gl_state.clientunit = i));CHECKGLERROR
700 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
703 combinergb = m->texcombinergb[i];
704 combinealpha = m->texcombinealpha[i];
706 combinergb = GL_MODULATE;
708 combinealpha = GL_MODULATE;
709 if (unit->combinergb != combinergb)
711 unit->combinergb = combinergb;
712 if (gl_combine.integer)
714 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
718 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
721 if (unit->combinealpha != combinealpha)
723 unit->combinealpha = combinealpha;
724 if (gl_combine.integer)
726 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
729 if (unit->t1d != m->tex1d[i])
734 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
739 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
741 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
743 if (unit->t2d != m->tex[i])
748 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
753 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
755 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
757 if (unit->t3d != m->tex3d[i])
762 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
767 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
769 qglBindTexture(GL_TEXTURE_3D, (unit->t3d = m->tex3d[i]));CHECKGLERROR
771 if (unit->tcubemap != m->texcubemap[i])
773 if (m->texcubemap[i])
775 if (unit->tcubemap == 0)
776 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
781 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
783 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
786 scale = max(m->texrgbscale[i], 1);
787 if (gl_state.units[i].rgbscale != scale)
789 if (gl_state.unit != i)
791 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
793 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (gl_state.units[i].rgbscale = scale));CHECKGLERROR
795 scale = max(m->texalphascale[i], 1);
796 if (gl_state.units[i].alphascale != scale)
798 if (gl_state.unit != i)
800 qglActiveTexture(GL_TEXTURE0_ARB + (gl_state.unit = i));CHECKGLERROR
802 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (gl_state.units[i].alphascale = scale));CHECKGLERROR
807 void R_Mesh_State(const rmeshstate_t *m)
810 R_Mesh_TextureState(m);
814 ==============================================================================
818 ==============================================================================
821 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
827 if (!r_render.integer)
830 buffer = Mem_Alloc(tempmempool, width*height*3);
831 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
834 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
835 if (v_hwgamma.integer)
836 for (i = 0;i < width * height * 3;i++)
837 buffer[i] <<= v_overbrightbits.integer;
839 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
845 //=============================================================================
847 void R_ClearScreen(void)
849 if (r_render.integer)
852 qglClearColor(0,0,0,0);CHECKGLERROR
853 qglClearDepth(1);CHECKGLERROR
856 qglClearStencil(0);CHECKGLERROR
859 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));CHECKGLERROR
860 // set dithering mode
861 if (gl_dither.integer)
863 qglEnable(GL_DITHER);CHECKGLERROR
867 qglDisable(GL_DITHER);CHECKGLERROR
876 This is called every frame, and can also be called explicitly to flush
880 void SCR_UpdateScreen (void)
884 R_TimeReport("finish");
886 if (r_textureunits.integer > gl_textureunits)
887 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
888 if (r_textureunits.integer < 1)
889 Cvar_SetValueQuick(&r_textureunits, 1);
891 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
892 Cvar_SetValueQuick(&gl_combine, 0);
895 r_colorscale = 1.0f / (float) (1 << v_overbrightbits.integer);
898 r_lightmapscalebit = v_overbrightbits.integer;
899 if (gl_combine.integer && r_textureunits.integer > 1)
900 r_lightmapscalebit += 2;
902 R_TimeReport("setup");
906 R_TimeReport("clear");
908 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
914 // tell driver to commit it's partially full geometry queue to the rendering queue
915 // (this doesn't wait for the commands themselves to complete)