4 //cvar_t gl_mesh_maxtriangles = {0, "gl_mesh_maxtriangles", "21760"};
5 cvar_t gl_mesh_maxtriangles = {0, "gl_mesh_maxtriangles", "1024"};
6 //cvar_t gl_mesh_batchtriangles = {0, "gl_mesh_batchtriangles", "1024"};
7 cvar_t gl_mesh_batchtriangles = {0, "gl_mesh_batchtriangles", "0"};
8 cvar_t gl_mesh_transtriangles = {0, "gl_mesh_transtriangles", "16384"};
9 cvar_t gl_mesh_floatcolors = {0, "gl_mesh_floatcolors", "0"};
10 cvar_t gl_mesh_drawmode = {CVAR_SAVE, "gl_mesh_drawmode", "3"};
12 cvar_t r_render = {0, "r_render", "1"};
13 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1"}; // whether or not to use dithering
14 cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
16 int gl_maxdrawrangeelementsvertices;
17 int gl_maxdrawrangeelementsindices;
22 void GL_PrintError(int errornumber, char *filename, int linenumber)
26 #ifdef GL_INVALID_ENUM
28 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
31 #ifdef GL_INVALID_VALUE
32 case GL_INVALID_VALUE:
33 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
36 #ifdef GL_INVALID_OPERATION
37 case GL_INVALID_OPERATION:
38 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
41 #ifdef GL_STACK_OVERFLOW
42 case GL_STACK_OVERFLOW:
43 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
46 #ifdef GL_STACK_UNDERFLOW
47 case GL_STACK_UNDERFLOW:
48 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
51 #ifdef GL_OUT_OF_MEMORY
52 case GL_OUT_OF_MEMORY:
53 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
56 #ifdef GL_TABLE_TOO_LARGE
57 case GL_TABLE_TOO_LARGE:
58 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
62 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
68 float r_farclip, r_newfarclip;
70 int polyindexarray[768];
72 static float viewdist;
74 int c_meshs, c_meshtris, c_transmeshs, c_transtris;
78 float overbrightscale;
80 void SCR_ScreenShot_f (void);
83 static int max_transmeshs;
85 static int max_verts; // always max_meshs * 3
86 static int max_transverts; // always max_transmeshs * 3
87 #define TRANSDEPTHRES 4096
89 typedef struct buf_mesh_s
93 int blendfunc1, blendfunc2;
94 int textures[MAX_TEXTUREUNITS];
95 int texturergbscale[MAX_TEXTUREUNITS];
100 struct buf_mesh_s *chain;
101 struct buf_transtri_s *transchain;
105 typedef struct buf_transtri_s
107 struct buf_transtri_s *next;
108 struct buf_transtri_s *meshsortchain;
114 typedef struct buf_tri_s
144 static float meshfarclip;
145 static int currentmesh, currenttriangle, currentvertex, backendunits, backendactive, transranout;
146 static buf_mesh_t *buf_mesh;
147 static buf_tri_t *buf_tri;
148 static buf_vertex_t *buf_vertex;
149 static buf_fcolor_t *buf_fcolor;
150 static buf_bcolor_t *buf_bcolor;
151 static buf_texcoord_t *buf_texcoord[MAX_TEXTUREUNITS];
153 static int currenttransmesh, currenttransvertex, currenttranstriangle;
154 static buf_mesh_t *buf_transmesh;
155 static buf_transtri_t *buf_sorttranstri;
156 static buf_transtri_t **buf_sorttranstri_list;
157 static buf_tri_t *buf_transtri;
158 static buf_vertex_t *buf_transvertex;
159 static buf_fcolor_t *buf_transfcolor;
160 static buf_texcoord_t *buf_transtexcoord[MAX_TEXTUREUNITS];
162 static mempool_t *gl_backend_mempool;
163 static int resizingbuffers = false;
165 static void gl_backend_start(void)
169 max_verts = max_meshs * 3;
170 max_transverts = max_transmeshs * 3;
172 if (!gl_backend_mempool)
173 gl_backend_mempool = Mem_AllocPool("GL_Backend");
175 #define BACKENDALLOC(var, count, sizeofstruct, varname)\
177 var = Mem_Alloc(gl_backend_mempool, count * sizeof(sizeofstruct));\
179 Sys_Error("gl_backend_start: unable to allocate memory for %s (%d bytes)\n", (varname), count * sizeof(sizeofstruct));\
180 memset(var, 0, count * sizeof(sizeofstruct));\
183 BACKENDALLOC(buf_mesh, max_meshs, buf_mesh_t, "buf_mesh")
184 BACKENDALLOC(buf_tri, max_meshs, buf_tri_t, "buf_tri")
185 BACKENDALLOC(buf_vertex, max_verts, buf_vertex_t, "buf_vertex")
186 BACKENDALLOC(buf_fcolor, max_verts, buf_fcolor_t, "buf_fcolor")
187 BACKENDALLOC(buf_bcolor, max_verts, buf_bcolor_t, "buf_bcolor")
189 BACKENDALLOC(buf_transmesh, max_transmeshs, buf_mesh_t, "buf_transmesh")
190 BACKENDALLOC(buf_sorttranstri, max_transmeshs, buf_transtri_t, "buf_sorttranstri")
191 BACKENDALLOC(buf_sorttranstri_list, TRANSDEPTHRES, buf_transtri_t *, "buf_sorttranstri_list")
192 BACKENDALLOC(buf_transtri, max_transmeshs, buf_tri_t, "buf_transtri")
193 BACKENDALLOC(buf_transvertex, max_transverts, buf_vertex_t, "buf_vertex")
194 BACKENDALLOC(buf_transfcolor, max_transverts, buf_fcolor_t, "buf_fcolor")
196 for (i = 0;i < MAX_TEXTUREUNITS;i++)
198 // only allocate as many texcoord arrays as we need
199 if (i < gl_textureunits)
201 BACKENDALLOC(buf_texcoord[i], max_verts, buf_texcoord_t, va("buf_texcoord[%d]", i))
202 BACKENDALLOC(buf_transtexcoord[i], max_transverts, buf_texcoord_t, va("buf_transtexcoord[%d]", i))
206 buf_texcoord[i] = NULL;
207 buf_transtexcoord[i] = NULL;
210 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
211 backendactive = true;
214 static void gl_backend_shutdown(void)
217 Mem_EmptyPool(gl_backend_mempool);
219 Mem_FreePool(&gl_backend_mempool);
222 backendactive = false;
225 static void gl_backend_bufferchanges(int init)
227 if (gl_mesh_drawmode.integer == 3 && qglDrawRangeElements != NULL)
229 if (gl_mesh_maxtriangles.integer * 3 > gl_maxdrawrangeelementsindices)
230 Cvar_SetValueQuick(&gl_mesh_maxtriangles, (int) (gl_maxdrawrangeelementsindices / 3));
231 if (gl_mesh_maxtriangles.integer * 3 > gl_maxdrawrangeelementsvertices)
232 Cvar_SetValueQuick(&gl_mesh_maxtriangles, (int) (gl_maxdrawrangeelementsvertices / 3));
235 // 21760 is (65536 / 3) rounded off to a multiple of 128
236 if (gl_mesh_maxtriangles.integer < 1024)
237 Cvar_SetValueQuick(&gl_mesh_maxtriangles, 1024);
238 if (gl_mesh_maxtriangles.integer > 21760)
239 Cvar_SetValueQuick(&gl_mesh_maxtriangles, 21760);
241 if (gl_mesh_transtriangles.integer < 1024)
242 Cvar_SetValueQuick(&gl_mesh_transtriangles, 1024);
243 if (gl_mesh_transtriangles.integer > 65536)
244 Cvar_SetValueQuick(&gl_mesh_transtriangles, 65536);
246 if (gl_mesh_batchtriangles.integer < 0)
247 Cvar_SetValueQuick(&gl_mesh_batchtriangles, 0);
248 if (gl_mesh_batchtriangles.integer > gl_mesh_maxtriangles.integer)
249 Cvar_SetValueQuick(&gl_mesh_batchtriangles, gl_mesh_maxtriangles.integer);
251 max_batch = gl_mesh_batchtriangles.integer;
253 if (max_meshs != gl_mesh_maxtriangles.integer || max_transmeshs != gl_mesh_transtriangles.integer)
255 max_meshs = gl_mesh_maxtriangles.integer;
256 max_transmeshs = gl_mesh_transtriangles.integer;
260 resizingbuffers = true;
261 gl_backend_shutdown();
263 resizingbuffers = false;
268 static void gl_backend_newmap(void)
270 r_farclip = r_newfarclip = 2048.0f;
273 void gl_backend_init(void)
277 Cvar_RegisterVariable(&r_render);
278 Cvar_RegisterVariable(&gl_dither);
279 Cvar_RegisterVariable(&gl_lockarrays);
281 Cvar_SetValue("r_render", 0);
284 Cvar_RegisterVariable(&gl_mesh_maxtriangles);
285 Cvar_RegisterVariable(&gl_mesh_transtriangles);
286 Cvar_RegisterVariable(&gl_mesh_batchtriangles);
287 Cvar_RegisterVariable(&gl_mesh_floatcolors);
288 Cvar_RegisterVariable(&gl_mesh_drawmode);
289 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
290 gl_backend_bufferchanges(true);
291 for (i = 0;i < 256;i++)
293 polyindexarray[i*3+0] = 0;
294 polyindexarray[i*3+1] = i + 1;
295 polyindexarray[i*3+2] = i + 2;
299 int arraylocked = false;
301 void GL_LockArray(int first, int count)
303 if (!arraylocked && gl_supportslockarrays && gl_lockarrays.integer && gl_mesh_drawmode.integer != 0)
305 qglLockArraysEXT(first, count);
311 void GL_UnlockArray(void)
315 qglUnlockArraysEXT();
321 //static float gldepthmin, gldepthmax;
328 static void GL_SetupFrame (void)
331 double fovx, fovy, zNear, zFar, aspect;
333 // update farclip based on previous frame
334 r_farclip = r_newfarclip;
336 if (!r_render.integer)
339 // qglClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
342 qglDepthFunc (GL_LEQUAL);CHECKGLERROR
344 // qglDepthRange (gldepthmin, gldepthmax);CHECKGLERROR
347 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
348 qglLoadIdentity ();CHECKGLERROR
350 // y is weird beause OpenGL is bottom to top, we use top to bottom
351 qglViewport(r_refdef.x, vid.realheight - (r_refdef.y + r_refdef.height), r_refdef.width, r_refdef.height);CHECKGLERROR
358 fovx = r_refdef.fov_x;
359 fovy = r_refdef.fov_y;
360 aspect = r_refdef.width / r_refdef.height;
363 xmax = zNear * tan(fovx * M_PI / 360.0) * aspect;
364 ymax = zNear * tan(fovy * M_PI / 360.0);
367 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
369 // qglCullFace(GL_FRONT);CHECKGLERROR
371 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
372 qglLoadIdentity ();CHECKGLERROR
375 qglRotatef (-90, 1, 0, 0);CHECKGLERROR
376 qglRotatef (90, 0, 0, 1);CHECKGLERROR
378 qglRotatef (-r_refdef.viewangles[2], 1, 0, 0);CHECKGLERROR
379 qglRotatef (-r_refdef.viewangles[0], 0, 1, 0);CHECKGLERROR
380 qglRotatef (-r_refdef.viewangles[1], 0, 0, 1);CHECKGLERROR
382 qglTranslatef (-r_refdef.vieworg[0], -r_refdef.vieworg[1], -r_refdef.vieworg[2]);CHECKGLERROR
384 // qglGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
389 // if (gl_cull.integer)
391 // qglEnable(GL_CULL_FACE);CHECKGLERROR
395 // qglDisable(GL_CULL_FACE);CHECKGLERROR
398 // qglEnable(GL_BLEND);CHECKGLERROR
399 // qglEnable(GL_DEPTH_TEST);CHECKGLERROR
400 // qglDepthMask(1);CHECKGLERROR
403 static int mesh_blendfunc1;
404 static int mesh_blendfunc2;
405 static int mesh_blend;
406 static GLboolean mesh_depthmask;
407 static int mesh_depthtest;
408 static int mesh_unit;
409 static int mesh_clientunit;
410 static int mesh_texture[MAX_TEXTUREUNITS];
411 static float mesh_texturergbscale[MAX_TEXTUREUNITS];
413 void GL_SetupTextureState(void)
416 if (backendunits > 1)
418 for (i = 0;i < backendunits;i++)
420 qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
421 qglBindTexture(GL_TEXTURE_2D, mesh_texture[i]);CHECKGLERROR
422 if (gl_combine.integer)
424 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
425 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
426 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
427 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
428 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);CHECKGLERROR
429 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
430 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
431 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
432 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
433 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
434 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
435 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
436 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
437 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
438 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
439 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, mesh_texturergbscale[i]);CHECKGLERROR
440 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
444 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
448 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
452 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
454 if (gl_mesh_drawmode.integer != 0)
456 qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
457 qglTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[i]);CHECKGLERROR
460 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
464 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
471 qglBindTexture(GL_TEXTURE_2D, mesh_texture[0]);CHECKGLERROR
472 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
475 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
479 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
481 if (gl_mesh_drawmode.integer != 0)
483 qglTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[0]);CHECKGLERROR
486 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
490 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
496 // called at beginning of frame
498 void R_Mesh_Start(void)
502 Sys_Error("R_Mesh_Clear: called when backend is not active\n");
506 gl_backend_bufferchanges(false);
511 currenttransmesh = 0;
512 currenttranstriangle = 0;
513 currenttransvertex = 0;
516 viewdist = DotProduct(r_origin, vpn);
528 for (i = 0;i < backendunits;i++)
531 mesh_texturergbscale[i] = 1;
534 qglEnable(GL_CULL_FACE);CHECKGLERROR
535 qglCullFace(GL_FRONT);CHECKGLERROR
537 mesh_depthtest = true;
538 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
540 mesh_blendfunc1 = GL_ONE;
541 mesh_blendfunc2 = GL_ZERO;
542 qglBlendFunc(mesh_blendfunc1, mesh_blendfunc2);CHECKGLERROR
545 qglDisable(GL_BLEND);CHECKGLERROR
547 mesh_depthmask = GL_TRUE;
548 qglDepthMask(mesh_depthmask);CHECKGLERROR
551 if (gl_mesh_drawmode.integer != 0)
554 qglVertexPointer(3, GL_FLOAT, sizeof(buf_vertex_t), &buf_vertex[0].v[0]);CHECKGLERROR
555 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
556 if (gl_mesh_floatcolors.integer)
558 qglColorPointer(4, GL_FLOAT, sizeof(buf_fcolor_t), &buf_fcolor[0].c[0]);CHECKGLERROR
562 qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(buf_bcolor_t), &buf_bcolor[0].c[0]);CHECKGLERROR
564 qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
567 GL_SetupTextureState();
570 int gl_backend_rebindtextures;
572 void GL_UpdateFarclip(void)
577 // push out farclip based on vertices
578 // FIXME: wouldn't this be slow when using matrix transforms?
579 for (i = 0;i < currentvertex;i++)
581 farclip = DotProduct(buf_vertex[i].v, vpn);
582 if (meshfarclip < farclip)
583 meshfarclip = farclip;
586 farclip = meshfarclip + 256.0f - viewdist; // + 256 just to be safe
588 // push out farclip for next frame
589 if (farclip > r_newfarclip)
590 r_newfarclip = ceil((farclip + 255) / 256) * 256 + 256;
593 void GL_ConvertColorsFloatToByte(void)
596 // LordHavoc: to avoid problems with aliasing (treating memory as two
597 // different types - exactly what this is doing), these must be volatile
599 volatile int *icolor;
600 volatile float *fcolor;
603 total = currentvertex * 4;
605 // shift float to have 8bit fraction at base of number
606 fcolor = &buf_fcolor->c[0];
607 for (i = 0;i < total;)
609 fcolor[i ] += 32768.0f;
610 fcolor[i + 1] += 32768.0f;
611 fcolor[i + 2] += 32768.0f;
612 fcolor[i + 3] += 32768.0f;
616 // then read as integer and kill float bits...
617 icolor = (int *)&buf_fcolor->c[0];
618 bcolor = &buf_bcolor->c[0];
619 for (i = 0;i < total;)
621 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
622 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
623 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
624 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
629 void GL_MeshState(buf_mesh_t *mesh)
632 if (backendunits > 1)
634 for (i = 0;i < backendunits;i++)
636 if (mesh_texture[i] != mesh->textures[i])
640 qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
642 if (mesh_texture[i] == 0)
644 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
645 // have to disable texcoord array on disabled texture
646 // units due to NVIDIA driver bug with
647 // compiled_vertex_array
648 if (mesh_clientunit != i)
650 qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
652 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
654 qglBindTexture(GL_TEXTURE_2D, (mesh_texture[i] = mesh->textures[i]));CHECKGLERROR
655 if (mesh_texture[i] == 0)
657 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
658 // have to disable texcoord array on disabled texture
659 // units due to NVIDIA driver bug with
660 // compiled_vertex_array
661 if (mesh_clientunit != i)
663 qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
665 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
668 if (mesh_texturergbscale[i] != mesh->texturergbscale[i])
672 qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
674 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (mesh_texturergbscale[i] = mesh->texturergbscale[i]));CHECKGLERROR
680 if (mesh_texture[0] != mesh->textures[0])
682 if (mesh_texture[0] == 0)
684 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
685 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
687 qglBindTexture(GL_TEXTURE_2D, (mesh_texture[0] = mesh->textures[0]));CHECKGLERROR
688 if (mesh_texture[0] == 0)
690 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
691 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
695 if (mesh_blendfunc1 != mesh->blendfunc1 || mesh_blendfunc2 != mesh->blendfunc2)
697 qglBlendFunc(mesh_blendfunc1 = mesh->blendfunc1, mesh_blendfunc2 = mesh->blendfunc2);CHECKGLERROR
698 if (mesh_blendfunc2 == GL_ZERO)
700 if (mesh_blendfunc1 == GL_ONE)
705 qglDisable(GL_BLEND);CHECKGLERROR
713 qglEnable(GL_BLEND);CHECKGLERROR
722 qglEnable(GL_BLEND);CHECKGLERROR
726 if (mesh_depthtest != mesh->depthtest)
728 mesh_depthtest = mesh->depthtest;
730 qglEnable(GL_DEPTH_TEST);
732 qglDisable(GL_DEPTH_TEST);
734 if (mesh_depthmask != mesh->depthmask)
736 qglDepthMask(mesh_depthmask = mesh->depthmask);CHECKGLERROR
740 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, GLuint *index)
742 unsigned int i, j, in;
743 if (gl_mesh_drawmode.integer == 3 && qglDrawRangeElements == NULL)
744 Cvar_SetValueQuick(&gl_mesh_drawmode, 2);
746 if (gl_mesh_drawmode.integer == 3)
748 // GL 1.2 or GL 1.1 with extension
749 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, index);
751 else if (gl_mesh_drawmode.integer == 2)
754 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, index);
756 else if (gl_mesh_drawmode.integer == 1)
759 // feed it manually using glArrayElement
760 qglBegin(GL_TRIANGLES);
761 for (i = 0;i < indexcount;i++)
762 qglArrayElement(index[i]);
767 // GL 1.1 but not using vertex arrays - 3dfx glquake minigl driver
769 if (gl_mesh_drawmode.integer != 0)
770 Cvar_SetValueQuick(&gl_mesh_drawmode, 0);
771 qglBegin(GL_TRIANGLES);
772 if (r_multitexture.integer)
774 // the minigl doesn't have this (because it does not have ARB_multitexture)
775 for (i = 0;i < indexcount;i++)
778 qglColor4ub(buf_bcolor[in].c[0], buf_bcolor[in].c[1], buf_bcolor[in].c[2], buf_bcolor[in].c[3]);
779 for (j = 0;j < backendunits;j++)
781 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, buf_texcoord[j][in].t[0], buf_texcoord[j][in].t[1]);
782 qglVertex3f(buf_vertex[in].v[0], buf_vertex[in].v[1], buf_vertex[in].v[2]);
787 for (i = 0;i < indexcount;i++)
790 qglColor4ub(buf_bcolor[in].c[0], buf_bcolor[in].c[1], buf_bcolor[in].c[2], buf_bcolor[in].c[3]);
792 qglTexCoord2f(buf_texcoord[0][in].t[0], buf_texcoord[0][in].t[1]);
793 qglVertex3f(buf_vertex[in].v[0], buf_vertex[in].v[1], buf_vertex[in].v[2]);
799 if (qglDrawRangeElements)
800 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, index);
805 // FIXME: dynamic link to GL so we can get DrawRangeElements on WIN32
806 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, index);CHECKGLERROR
808 qglDrawRangeElements(GL_TRIANGLES, firstvert, firstvert + mesh->verts, indexcount, GL_UNSIGNED_INT, index);CHECKGLERROR
813 // renders mesh buffers, called to flush buffers when full
814 void R_Mesh_Render(void)
824 Sys_Error("R_Mesh_Render: called when backend is not active\n");
833 if (!gl_mesh_floatcolors.integer || gl_mesh_drawmode.integer == 0)
834 GL_ConvertColorsFloatToByte();
836 // lock the arrays now that they will have no further modifications
837 //GL_LockArray(0, currentvertex);CHECKGLERROR
838 if (gl_backend_rebindtextures)
840 gl_backend_rebindtextures = false;
841 GL_SetupTextureState();
844 GL_MeshState(buf_mesh);
845 GL_LockArray(0, currentvertex);
846 GL_DrawRangeElements(buf_mesh->firstvert, buf_mesh->firstvert + buf_mesh->verts, buf_mesh->triangles * 3, (unsigned int *)&buf_tri[buf_mesh->firsttriangle].index[0]);CHECKGLERROR
848 if (currentmesh >= 2)
850 for (k = 1, mesh = buf_mesh + k;k < currentmesh;k++, mesh++)
854 firstvert = mesh->firstvert;
855 indexcount = mesh->triangles * 3;
856 index = (unsigned int *)&buf_tri[mesh->firsttriangle].index[0];
858 // if not using batching, skip the index adjustment
860 for (i = 0;i < indexcount;i++)
861 index[i] += firstvert;
863 GL_DrawRangeElements(firstvert, firstvert + mesh->verts, indexcount, index);CHECKGLERROR
871 GL_UnlockArray();CHECKGLERROR
874 // restores backend state, used when done with 3D rendering
875 void R_Mesh_Finish(void)
878 // flush any queued meshs
881 if (backendunits > 1)
883 for (i = backendunits - 1;i >= 0;i--)
885 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
886 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
887 if (gl_combine.integer)
889 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
893 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
897 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
899 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
903 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
904 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
910 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
911 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
914 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
919 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
920 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
923 qglDisable(GL_BLEND);CHECKGLERROR
924 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
925 qglDepthMask(GL_TRUE);CHECKGLERROR
926 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
929 void R_Mesh_ClearDepth(void)
931 R_Mesh_AddTransparent();
933 qglClear(GL_DEPTH_BUFFER_BIT);
937 void R_Mesh_AddTransparent(void)
940 float viewdistcompare, centerscaler, dist1, dist2, dist3, center, maxdist;
941 buf_vertex_t *vert1, *vert2, *vert3;
943 buf_mesh_t *mesh, *transmesh;
945 if (!currenttransmesh)
948 // convert index data to transtris for sorting
949 for (j = 0;j < currenttransmesh;j++)
951 mesh = buf_transmesh + j;
952 k = mesh->firsttriangle;
953 index = &buf_transtri[k].index[0];
954 for (i = 0;i < mesh->triangles;i++)
956 tri = &buf_sorttranstri[k++];
958 tri->index[0] = *index++;
959 tri->index[1] = *index++;
960 tri->index[2] = *index++;
964 // map farclip to 0-4095 list range
965 centerscaler = (TRANSDEPTHRES / r_farclip) * (1.0f / 3.0f);
966 viewdistcompare = viewdist + 4.0f;
968 memset(buf_sorttranstri_list, 0, TRANSDEPTHRES * sizeof(buf_transtri_t *));
971 for (j = 0;j < currenttranstriangle;j++)
973 tri = &buf_sorttranstri[j];
974 i = tri->mesh->firstvert;
976 vert1 = &buf_transvertex[tri->index[0] + i];
977 vert2 = &buf_transvertex[tri->index[1] + i];
978 vert3 = &buf_transvertex[tri->index[2] + i];
980 dist1 = DotProduct(vert1->v, vpn);
981 dist2 = DotProduct(vert2->v, vpn);
982 dist3 = DotProduct(vert3->v, vpn);
984 maxdist = max(dist1, max(dist2, dist3));
985 if (maxdist < viewdistcompare)
988 center = (dist1 + dist2 + dist3) * centerscaler - viewdist;
991 i = bound(0, i, (TRANSDEPTHRES - 1));
995 center += 8388608.0f;
996 i = *((int *)¢er) & 0x7FFFFF;
997 i = min(i, (TRANSDEPTHRES - 1));
999 tri->next = buf_sorttranstri_list[i];
1000 buf_sorttranstri_list[i] = tri;
1004 for (i = 0;i < currenttransmesh;i++)
1005 buf_transmesh[i].transchain = NULL;
1007 for (j = 0;j < TRANSDEPTHRES;j++)
1009 if ((tri = buf_sorttranstri_list[j]))
1011 for (;tri;tri = tri->next)
1013 if (!tri->mesh->transchain)
1015 tri->mesh->chain = transmesh;
1016 transmesh = tri->mesh;
1018 tri->meshsortchain = tri->mesh->transchain;
1019 tri->mesh->transchain = tri;
1024 for (;transmesh;transmesh = transmesh->chain)
1026 if (currentmesh >= max_meshs || currenttriangle + transmesh->triangles > max_batch || currenttriangle + transmesh->triangles > 1024 || currentvertex + transmesh->verts > max_verts)
1029 mesh = &buf_mesh[currentmesh++];
1030 *mesh = *transmesh; // copy mesh properties
1032 mesh->firstvert = currentvertex;
1033 memcpy(&buf_vertex[currentvertex], &buf_transvertex[transmesh->firstvert], transmesh->verts * sizeof(buf_vertex_t));
1034 memcpy(&buf_fcolor[currentvertex], &buf_transfcolor[transmesh->firstvert], transmesh->verts * sizeof(buf_fcolor_t));
1035 for (i = 0;i < backendunits && transmesh->textures[i];i++)
1036 memcpy(&buf_texcoord[i][currentvertex], &buf_transtexcoord[i][transmesh->firstvert], transmesh->verts * sizeof(buf_texcoord_t));
1037 currentvertex += mesh->verts;
1039 mesh->firsttriangle = currenttriangle;
1040 for (tri = transmesh->transchain;tri;tri = tri->meshsortchain)
1042 buf_tri[currenttriangle].index[0] = tri->index[0];
1043 buf_tri[currenttriangle].index[1] = tri->index[1];
1044 buf_tri[currenttriangle].index[2] = tri->index[2];
1047 mesh->triangles = currenttriangle - mesh->firsttriangle;
1050 currenttransmesh = 0;
1051 currenttranstriangle = 0;
1052 currenttransvertex = 0;
1055 void R_Mesh_Draw(const rmeshinfo_t *m)
1057 // these are static because gcc runs out of virtual registers otherwise
1058 static int i, j, overbright, *index;
1059 static float *in, scaler;
1060 static float cr, cg, cb, ca;
1061 static buf_mesh_t *mesh;
1062 static buf_vertex_t *vert;
1063 static buf_fcolor_t *fcolor;
1064 static buf_texcoord_t *texcoord[MAX_TEXTUREUNITS];
1067 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1069 if (m->index == NULL
1071 || m->vertex == NULL
1073 Host_Error("R_Mesh_Draw: no triangles or verts\n");
1075 // ignore meaningless alpha meshs
1076 if (!m->depthwrite && m->blendfunc1 == GL_SRC_ALPHA && (m->blendfunc2 == GL_ONE || m->blendfunc2 == GL_ONE_MINUS_SRC_ALPHA))
1080 for (i = 0, in = m->color + 3;i < m->numverts;i++, (int)in += m->colorstep)
1083 if (i == m->numverts)
1086 else if (m->ca < 0.01f)
1091 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1094 for (i = 0;i < m->numtriangles * 3;i++)
1095 if ((unsigned int) m->index[i] >= (unsigned int) m->numverts)
1096 Host_Error("R_Mesh_Draw: invalid index (%i of %i verts)\n", m->index, m->numverts);
1099 // FIXME: we can work around this by falling back on non-array renderer if buffers are too big
1100 if (m->numtriangles > 1024 || m->numverts > 3072)
1102 Con_Printf("R_Mesh_Draw: mesh too big for 3DFX drivers, rejected\n");
1106 if (m->numtriangles > max_meshs || m->numverts > max_verts)
1108 Con_Printf("R_Mesh_Draw: mesh too big for current gl_mesh_maxtriangles setting, rejected\n");
1115 if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
1119 Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
1126 c_transtris += m->numtriangles;
1127 vert = &buf_transvertex[currenttransvertex];
1128 fcolor = &buf_transfcolor[currenttransvertex];
1129 for (i = 0;i < backendunits;i++)
1130 texcoord[i] = &buf_transtexcoord[i][currenttransvertex];
1132 // transmesh is only for storage of transparent meshs until they
1133 // are inserted into the main mesh array
1134 mesh = &buf_transmesh[currenttransmesh++];
1135 mesh->firsttriangle = currenttranstriangle;
1136 mesh->firstvert = currenttransvertex;
1137 index = &buf_transtri[currenttranstriangle].index[0];
1139 currenttranstriangle += m->numtriangles;
1140 currenttransvertex += m->numverts;
1144 if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
1148 c_meshtris += m->numtriangles;
1149 vert = &buf_vertex[currentvertex];
1150 fcolor = &buf_fcolor[currentvertex];
1151 for (i = 0;i < backendunits;i++)
1152 texcoord[i] = &buf_texcoord[i][currentvertex];
1154 // opaque meshs are rendered directly
1155 mesh = &buf_mesh[currentmesh++];
1156 mesh->firsttriangle = currenttriangle;
1157 mesh->firstvert = currentvertex;
1158 index = &buf_tri[currenttriangle].index[0];
1160 currenttriangle += m->numtriangles;
1161 currentvertex += m->numverts;
1164 // code shared for transparent and opaque meshs
1165 memcpy(index, m->index, sizeof(int[3]) * m->numtriangles);
1166 mesh->blendfunc1 = m->blendfunc1;
1167 mesh->blendfunc2 = m->blendfunc2;
1168 mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
1169 mesh->depthtest = !m->depthdisable;
1170 mesh->triangles = m->numtriangles;
1171 mesh->verts = m->numverts;
1175 if (m->blendfunc2 == GL_SRC_COLOR)
1177 if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
1184 overbright = gl_combine.integer;
1188 scaler *= overbrightscale;
1193 for (i = 0;i < backendunits;i++)
1195 if ((mesh->textures[i] = m->tex[i]))
1197 mesh->texturergbscale[i] = m->texrgbscale[i];
1198 if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
1199 mesh->texturergbscale[i] = 1;
1201 if (overbright && j >= 0)
1202 mesh->texturergbscale[j] = 4;
1204 if (m->vertexstep != sizeof(buf_vertex_t))
1206 for (i = 0, in = m->vertex;i < m->numverts;i++, (int)in += m->vertexstep)
1208 vert[i].v[0] = in[0];
1209 vert[i].v[1] = in[1];
1210 vert[i].v[2] = in[2];
1214 memcpy(vert, m->vertex, m->numverts * sizeof(buf_vertex_t));
1218 for (i = 0, in = m->color;i < m->numverts;i++, (int)in += m->colorstep)
1220 fcolor[i].c[0] = in[0] * scaler;
1221 fcolor[i].c[1] = in[1] * scaler;
1222 fcolor[i].c[2] = in[2] * scaler;
1223 fcolor[i].c[3] = in[3];
1228 cr = m->cr * scaler;
1229 cg = m->cg * scaler;
1230 cb = m->cb * scaler;
1232 for (i = 0;i < m->numverts;i++)
1234 fcolor[i].c[0] = cr;
1235 fcolor[i].c[1] = cg;
1236 fcolor[i].c[2] = cb;
1237 fcolor[i].c[3] = ca;
1241 for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
1243 if (j >= backendunits)
1244 Sys_Error("R_Mesh_Draw: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
1245 if (m->texcoordstep[j] != sizeof(buf_texcoord_t))
1247 for (i = 0, in = m->texcoords[j];i < m->numverts;i++, (int)in += m->texcoordstep[j])
1249 texcoord[j][i].t[0] = in[0];
1250 texcoord[j][i].t[1] = in[1];
1254 memcpy(&texcoord[j][0].t[0], m->texcoords[j], m->numverts * sizeof(buf_texcoord_t));
1257 for (;j < backendunits;j++)
1258 memset(&texcoord[j][0].t[0], 0, m->numverts * sizeof(buf_texcoord_t));
1261 if (currenttriangle >= max_batch)
1265 void R_Mesh_Draw_NativeOnly(const rmeshinfo_t *m)
1267 // these are static because gcc runs out of virtual registers otherwise
1268 static int i, j, overbright, *index;
1269 static float *in, scaler;
1270 static buf_mesh_t *mesh;
1271 static buf_vertex_t *vert;
1272 static buf_fcolor_t *fcolor;
1273 static buf_texcoord_t *texcoord[MAX_TEXTUREUNITS];
1276 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1278 if (m->index == NULL
1280 || m->vertex == NULL
1282 Host_Error("R_Mesh_Draw: no triangles or verts\n");
1284 // ignore meaningless alpha meshs
1285 if (!m->depthwrite && m->blendfunc1 == GL_SRC_ALPHA && (m->blendfunc2 == GL_ONE || m->blendfunc2 == GL_ONE_MINUS_SRC_ALPHA))
1289 for (i = 0, in = m->color + 3;i < m->numverts;i++, (int)in += m->colorstep)
1292 if (i == m->numverts)
1295 else if (m->ca < 0.01f)
1299 // FIXME: we can work around this by falling back on non-array renderer if buffers are too big
1300 if (m->numtriangles > 1024 || m->numverts > 3072)
1302 Con_Printf("R_Mesh_Draw_NativeOnly: mesh too big for 3DFX drivers, rejected\n");
1306 if (m->numtriangles > max_meshs || m->numverts > max_verts)
1308 Con_Printf("R_Mesh_Draw_NativeOnly: mesh too big for current gl_mesh_maxtriangles setting, rejected\n");
1315 if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
1319 Con_Printf("R_Mesh_Draw_NativeOnly: ran out of room for transparent meshs\n");
1326 c_transtris += m->numtriangles;
1327 vert = &buf_transvertex[currenttransvertex];
1328 fcolor = &buf_transfcolor[currenttransvertex];
1329 for (i = 0;i < backendunits;i++)
1330 texcoord[i] = &buf_transtexcoord[i][currenttransvertex];
1332 // transmesh is only for storage of transparent meshs until they
1333 // are inserted into the main mesh array
1334 mesh = &buf_transmesh[currenttransmesh++];
1335 mesh->firsttriangle = currenttranstriangle;
1336 mesh->firstvert = currenttransvertex;
1337 index = &buf_transtri[currenttranstriangle].index[0];
1338 currenttranstriangle += m->numtriangles;
1339 currenttransvertex += m->numverts;
1343 if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
1347 c_meshtris += m->numtriangles;
1348 vert = &buf_vertex[currentvertex];
1349 fcolor = &buf_fcolor[currentvertex];
1350 for (i = 0;i < backendunits;i++)
1351 texcoord[i] = &buf_texcoord[i][currentvertex];
1353 // opaque meshs are rendered directly
1354 mesh = &buf_mesh[currentmesh++];
1355 mesh->firsttriangle = currenttriangle;
1356 mesh->firstvert = currentvertex;
1357 index = &buf_tri[currenttriangle].index[0];
1358 currenttriangle += m->numtriangles;
1359 currentvertex += m->numverts;
1362 // code shared for transparent and opaque meshs
1363 memcpy(index, m->index, sizeof(int[3]) * m->numtriangles);
1364 mesh->blendfunc1 = m->blendfunc1;
1365 mesh->blendfunc2 = m->blendfunc2;
1366 mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
1367 mesh->depthtest = !m->depthdisable;
1368 mesh->triangles = m->numtriangles;
1369 mesh->verts = m->numverts;
1373 if (m->blendfunc2 == GL_SRC_COLOR)
1375 if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
1382 overbright = gl_combine.integer;
1386 scaler *= overbrightscale;
1390 for (i = 0;i < backendunits;i++)
1392 if ((mesh->textures[i] = m->tex[i]))
1394 mesh->texturergbscale[i] = m->texrgbscale[i];
1395 if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
1396 mesh->texturergbscale[i] = 1;
1398 if (overbright && j >= 0)
1399 mesh->texturergbscale[j] = 4;
1401 if (m->vertexstep != sizeof(buf_vertex_t))
1402 Host_Error("R_Mesh_Draw_NativeOnly: unsupported vertexstep\n");
1403 if (m->colorstep != sizeof(buf_fcolor_t))
1404 Host_Error("R_Mesh_Draw_NativeOnly: unsupported colorstep\n");
1405 if (m->color == NULL)
1406 Host_Error("R_Mesh_Draw_NativeOnly: must provide color array\n");
1407 for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
1409 if (j >= backendunits)
1410 Sys_Error("R_Mesh_Draw_NativeOnly: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
1411 if (m->texcoordstep[j] != sizeof(buf_texcoord_t))
1412 Host_Error("R_Mesh_Draw_NativeOnly: unsupported texcoordstep\n");
1415 memcpy(vert, m->vertex, m->numverts * sizeof(buf_vertex_t));
1416 for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
1417 memcpy(&texcoord[j][0].t[0], m->texcoords[j], m->numverts * sizeof(buf_texcoord_t));
1419 for (;j < backendunits;j++)
1420 memset(&texcoord[j][0].t[0], 0, m->numverts * sizeof(buf_texcoord_t));
1423 memcpy(fcolor, m->color, m->numverts * sizeof(buf_fcolor_t));
1425 // do this as a second step because memcpy preloaded the cache, which we can't easily do
1428 for (i = 0;i < m->numverts;i++)
1430 fcolor[i].c[0] *= scaler;
1431 fcolor[i].c[1] *= scaler;
1432 fcolor[i].c[2] *= scaler;
1436 if (currenttriangle >= max_batch)
1440 // allocates space in geometry buffers, and fills in pointers to the buffers in passsed struct
1441 // (this is used for very high speed rendering, no copying)
1442 int R_Mesh_Draw_GetBuffer(rmeshbufferinfo_t *m)
1444 // these are static because gcc runs out of virtual registers otherwise
1445 int i, j, overbright;
1450 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1452 if (!m->numtriangles
1454 Host_Error("R_Mesh_Draw: no triangles or verts\n");
1456 // FIXME: we can work around this by falling back on non-array renderer if buffers are too big
1457 if (m->numtriangles > 1024 || m->numverts > 3072)
1459 Con_Printf("R_Mesh_Draw_GetBuffer: mesh too big for 3DFX drivers, rejected\n");
1463 if (m->numtriangles > max_meshs || m->numverts > max_verts)
1465 Con_Printf("R_Mesh_Draw_GetBuffer: mesh too big for current gl_mesh_maxtriangles setting, rejected\n");
1472 if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
1476 Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
1483 c_transtris += m->numtriangles;
1484 m->index = &buf_transtri[currenttranstriangle].index[0];
1485 m->vertex = &buf_transvertex[currenttransvertex].v[0];
1486 m->color = &buf_transfcolor[currenttransvertex].c[0];
1487 for (i = 0;i < backendunits;i++)
1488 m->texcoords[i] = &buf_transtexcoord[i][currenttransvertex].t[0];
1490 // transmesh is only for storage of transparent meshs until they
1491 // are inserted into the main mesh array
1492 mesh = &buf_transmesh[currenttransmesh++];
1493 mesh->firsttriangle = currenttranstriangle;
1494 mesh->firstvert = currenttransvertex;
1495 currenttranstriangle += m->numtriangles;
1496 currenttransvertex += m->numverts;
1500 if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
1504 c_meshtris += m->numtriangles;
1505 m->index = &buf_tri[currenttriangle].index[0];
1506 m->vertex = &buf_vertex[currentvertex].v[0];
1507 m->color = &buf_fcolor[currentvertex].c[0];
1508 for (i = 0;i < backendunits;i++)
1509 m->texcoords[i] = &buf_texcoord[i][currentvertex].t[0];
1511 // opaque meshs are rendered directly
1512 mesh = &buf_mesh[currentmesh++];
1513 mesh->firsttriangle = currenttriangle;
1514 mesh->firstvert = currentvertex;
1515 currenttriangle += m->numtriangles;
1516 currentvertex += m->numverts;
1519 // code shared for transparent and opaque meshs
1520 mesh->blendfunc1 = m->blendfunc1;
1521 mesh->blendfunc2 = m->blendfunc2;
1522 mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
1523 mesh->depthtest = !m->depthdisable;
1524 mesh->triangles = m->numtriangles;
1525 mesh->verts = m->numverts;
1529 if (m->blendfunc2 == GL_SRC_COLOR)
1531 if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
1538 overbright = gl_combine.integer;
1542 scaler *= overbrightscale;
1544 m->colorscale = scaler;
1547 for (i = 0;i < MAX_TEXTUREUNITS;i++)
1549 if ((mesh->textures[i] = m->tex[i]))
1552 if (i >= backendunits)
1553 Sys_Error("R_Mesh_Draw_GetBuffer: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
1555 mesh->texturergbscale[i] = m->texrgbscale[i];
1556 if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
1557 mesh->texturergbscale[i] = 1;
1559 if (overbright && j >= 0)
1560 mesh->texturergbscale[j] = 4;
1565 void R_Mesh_DrawPolygon(rmeshinfo_t *m, int numverts)
1567 m->index = polyindexarray;
1568 m->numverts = numverts;
1569 m->numtriangles = numverts - 2;
1570 if (m->numtriangles < 1)
1572 Con_Printf("R_Mesh_DrawPolygon: invalid vertex count\n");
1575 if (m->numtriangles >= 256)
1577 Con_Printf("R_Mesh_DrawPolygon: only up to 256 triangles (258 verts) supported\n");
1584 ==============================================================================
1588 ==============================================================================
1591 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
1597 if (!r_render.integer)
1600 buffer = Mem_Alloc(tempmempool, width*height*3);
1601 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
1604 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
1605 if (v_hwgamma.integer)
1606 for (i = 0;i < width * height * 3;i++)
1607 buffer[i] <<= v_overbrightbits.integer;
1609 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
1615 //=============================================================================
1617 void R_ClearScreen(void)
1619 if (r_render.integer)
1622 qglClearColor(0,0,0,0);CHECKGLERROR
1624 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);CHECKGLERROR
1625 // set dithering mode
1626 if (gl_dither.integer)
1628 qglEnable(GL_DITHER);CHECKGLERROR
1632 qglDisable(GL_DITHER);CHECKGLERROR
1641 This is called every frame, and can also be called explicitly to flush
1645 void SCR_UpdateScreen (void)
1647 //Mem_CheckSentinelsGlobal();
1648 //R_TimeReport("memtest");
1652 R_TimeReport("finish");
1654 if (gl_combine.integer && !gl_combine_extension)
1655 Cvar_SetValue("gl_combine", 0);
1657 lightscalebit = v_overbrightbits.integer;
1658 if (gl_combine.integer && r_multitexture.integer)
1661 lightscale = 1.0f / (float) (1 << lightscalebit);
1662 overbrightscale = 1.0f / (float) (1 << v_overbrightbits.integer);
1664 R_TimeReport("setup");
1668 R_TimeReport("clear");
1670 if (scr_conlines < vid.conheight)
1676 // tell driver to commit it's partially full geometry queue to the rendering queue
1677 // (this doesn't wait for the commands themselves to complete)