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)
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 < 256)
237 Cvar_SetValueQuick(&gl_mesh_maxtriangles, 256);
238 if (gl_mesh_maxtriangles.integer > 21760)
239 Cvar_SetValueQuick(&gl_mesh_maxtriangles, 21760);
241 if (gl_mesh_transtriangles.integer < 256)
242 Cvar_SetValueQuick(&gl_mesh_transtriangles, 256);
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)
595 int i, k, total, *icolor;
599 total = currentvertex * 4;
601 // shift float to have 8bit fraction at base of number
602 fcolor = &buf_fcolor->c[0];
603 for (i = 0;i < total;)
605 fcolor[i ] += 32768.0f;
606 fcolor[i + 1] += 32768.0f;
607 fcolor[i + 2] += 32768.0f;
608 fcolor[i + 3] += 32768.0f;
612 // then read as integer and kill float bits...
613 icolor = (int *)&buf_fcolor->c[0];
614 bcolor = &buf_bcolor->c[0];
615 for (i = 0;i < total;)
617 k = icolor[i ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i ] = (qbyte) k;
618 k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
619 k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
620 k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
625 void GL_MeshState(buf_mesh_t *mesh)
628 if (backendunits > 1)
630 for (i = 0;i < backendunits;i++)
632 if (mesh_texture[i] != mesh->textures[i])
636 qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
638 if (mesh_texture[i] == 0)
640 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
641 // have to disable texcoord array on disabled texture
642 // units due to NVIDIA driver bug with
643 // compiled_vertex_array
644 if (mesh_clientunit != i)
646 qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
648 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
650 qglBindTexture(GL_TEXTURE_2D, (mesh_texture[i] = mesh->textures[i]));CHECKGLERROR
651 if (mesh_texture[i] == 0)
653 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
654 // have to disable texcoord array on disabled texture
655 // units due to NVIDIA driver bug with
656 // compiled_vertex_array
657 if (mesh_clientunit != i)
659 qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
661 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
664 if (mesh_texturergbscale[i] != mesh->texturergbscale[i])
668 qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
670 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (mesh_texturergbscale[i] = mesh->texturergbscale[i]));CHECKGLERROR
676 if (mesh_texture[0] != mesh->textures[0])
678 if (mesh_texture[0] == 0)
680 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
681 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
683 qglBindTexture(GL_TEXTURE_2D, (mesh_texture[0] = mesh->textures[0]));CHECKGLERROR
684 if (mesh_texture[0] == 0)
686 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
687 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
691 if (mesh_blendfunc1 != mesh->blendfunc1 || mesh_blendfunc2 != mesh->blendfunc2)
693 qglBlendFunc(mesh_blendfunc1 = mesh->blendfunc1, mesh_blendfunc2 = mesh->blendfunc2);CHECKGLERROR
694 if (mesh_blendfunc2 == GL_ZERO)
696 if (mesh_blendfunc1 == GL_ONE)
701 qglDisable(GL_BLEND);CHECKGLERROR
709 qglEnable(GL_BLEND);CHECKGLERROR
718 qglEnable(GL_BLEND);CHECKGLERROR
722 if (mesh_depthtest != mesh->depthtest)
724 mesh_depthtest = mesh->depthtest;
726 qglEnable(GL_DEPTH_TEST);
728 qglDisable(GL_DEPTH_TEST);
730 if (mesh_depthmask != mesh->depthmask)
732 qglDepthMask(mesh_depthmask = mesh->depthmask);CHECKGLERROR
736 void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, GLuint *index)
738 unsigned int i, j, in;
739 if (gl_mesh_drawmode.integer == 3 && qglDrawRangeElements == NULL)
740 Cvar_SetValueQuick(&gl_mesh_drawmode, 2);
742 if (gl_mesh_drawmode.integer == 3)
744 // GL 1.2 or GL 1.1 with extension
745 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, index);
747 else if (gl_mesh_drawmode.integer == 2)
750 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, index);
752 else if (gl_mesh_drawmode.integer == 1)
755 // feed it manually using glArrayElement
756 qglBegin(GL_TRIANGLES);
757 for (i = 0;i < indexcount;i++)
758 qglArrayElement(index[i]);
763 // GL 1.1 but not using vertex arrays - 3dfx glquake minigl driver
765 if (gl_mesh_drawmode.integer != 0)
766 Cvar_SetValueQuick(&gl_mesh_drawmode, 0);
767 qglBegin(GL_TRIANGLES);
768 if (r_multitexture.integer)
770 // the minigl doesn't have this (because it does not have ARB_multitexture)
771 for (i = 0;i < indexcount;i++)
774 qglColor4ub(buf_bcolor[in].c[0], buf_bcolor[in].c[1], buf_bcolor[in].c[2], buf_bcolor[in].c[3]);
775 for (j = 0;j < backendunits;j++)
777 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, buf_texcoord[j][in].t[0], buf_texcoord[j][in].t[1]);
778 qglVertex3f(buf_vertex[in].v[0], buf_vertex[in].v[1], buf_vertex[in].v[2]);
783 for (i = 0;i < indexcount;i++)
786 qglColor4ub(buf_bcolor[in].c[0], buf_bcolor[in].c[1], buf_bcolor[in].c[2], buf_bcolor[in].c[3]);
788 qglTexCoord2f(buf_texcoord[0][in].t[0], buf_texcoord[0][in].t[1]);
789 qglVertex3f(buf_vertex[in].v[0], buf_vertex[in].v[1], buf_vertex[in].v[2]);
795 if (qglDrawRangeElements)
796 qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, index);
801 // FIXME: dynamic link to GL so we can get DrawRangeElements on WIN32
802 qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, index);CHECKGLERROR
804 qglDrawRangeElements(GL_TRIANGLES, firstvert, firstvert + mesh->verts, indexcount, GL_UNSIGNED_INT, index);CHECKGLERROR
809 // renders mesh buffers, called to flush buffers when full
810 void R_Mesh_Render(void)
820 Sys_Error("R_Mesh_Render: called when backend is not active\n");
829 if (!gl_mesh_floatcolors.integer || gl_mesh_drawmode.integer == 0)
830 GL_ConvertColorsFloatToByte();
832 // lock the arrays now that they will have no further modifications
833 //GL_LockArray(0, currentvertex);CHECKGLERROR
834 if (gl_backend_rebindtextures)
836 gl_backend_rebindtextures = false;
837 GL_SetupTextureState();
840 GL_MeshState(buf_mesh);
841 GL_LockArray(0, currentvertex);
842 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
844 if (currentmesh >= 2)
846 for (k = 1, mesh = buf_mesh + k;k < currentmesh;k++, mesh++)
850 firstvert = mesh->firstvert;
851 indexcount = mesh->triangles * 3;
852 index = (unsigned int *)&buf_tri[mesh->firsttriangle].index[0];
854 // if not using batching, skip the index adjustment
856 for (i = 0;i < indexcount;i++)
857 index[i] += firstvert;
859 GL_DrawRangeElements(firstvert, firstvert + mesh->verts, indexcount, index);CHECKGLERROR
867 GL_UnlockArray();CHECKGLERROR
870 // restores backend state, used when done with 3D rendering
871 void R_Mesh_Finish(void)
874 // flush any queued meshs
877 if (backendunits > 1)
879 for (i = backendunits - 1;i >= 0;i--)
881 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
882 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
883 if (gl_combine.integer)
885 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
889 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
893 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
895 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
899 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
900 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
906 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
907 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
910 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
915 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
916 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
919 qglDisable(GL_BLEND);CHECKGLERROR
920 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
921 qglDepthMask(GL_TRUE);CHECKGLERROR
922 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
925 void R_Mesh_ClearDepth(void)
927 R_Mesh_AddTransparent();
929 qglClear(GL_DEPTH_BUFFER_BIT);
933 void R_Mesh_AddTransparent(void)
936 float viewdistcompare, centerscaler, dist1, dist2, dist3, center, maxdist;
937 buf_vertex_t *vert1, *vert2, *vert3;
939 buf_mesh_t *mesh, *transmesh;
941 if (!currenttransmesh)
944 // convert index data to transtris for sorting
945 for (j = 0;j < currenttransmesh;j++)
947 mesh = buf_transmesh + j;
948 k = mesh->firsttriangle;
949 index = &buf_transtri[k].index[0];
950 for (i = 0;i < mesh->triangles;i++)
952 tri = &buf_sorttranstri[k++];
954 tri->index[0] = *index++;
955 tri->index[1] = *index++;
956 tri->index[2] = *index++;
960 // map farclip to 0-4095 list range
961 centerscaler = (TRANSDEPTHRES / r_farclip) * (1.0f / 3.0f);
962 viewdistcompare = viewdist + 4.0f;
964 memset(buf_sorttranstri_list, 0, TRANSDEPTHRES * sizeof(buf_transtri_t *));
967 for (j = 0;j < currenttranstriangle;j++)
969 tri = &buf_sorttranstri[j];
970 i = tri->mesh->firstvert;
972 vert1 = &buf_transvertex[tri->index[0] + i];
973 vert2 = &buf_transvertex[tri->index[1] + i];
974 vert3 = &buf_transvertex[tri->index[2] + i];
976 dist1 = DotProduct(vert1->v, vpn);
977 dist2 = DotProduct(vert2->v, vpn);
978 dist3 = DotProduct(vert3->v, vpn);
980 maxdist = max(dist1, max(dist2, dist3));
981 if (maxdist < viewdistcompare)
984 center = (dist1 + dist2 + dist3) * centerscaler - viewdist;
987 i = bound(0, i, (TRANSDEPTHRES - 1));
991 center += 8388608.0f;
992 i = *((int *)¢er) & 0x7FFFFF;
993 i = min(i, (TRANSDEPTHRES - 1));
995 tri->next = buf_sorttranstri_list[i];
996 buf_sorttranstri_list[i] = tri;
1000 for (i = 0;i < currenttransmesh;i++)
1001 buf_transmesh[i].transchain = NULL;
1003 for (j = 0;j < TRANSDEPTHRES;j++)
1005 if ((tri = buf_sorttranstri_list[j]))
1007 for (;tri;tri = tri->next)
1009 if (!tri->mesh->transchain)
1011 tri->mesh->chain = transmesh;
1012 transmesh = tri->mesh;
1014 tri->meshsortchain = tri->mesh->transchain;
1015 tri->mesh->transchain = tri;
1020 for (;transmesh;transmesh = transmesh->chain)
1022 if (currentmesh >= max_meshs || currenttriangle + transmesh->triangles > max_batch || currenttriangle + transmesh->triangles > 1024 || currentvertex + transmesh->verts > max_verts)
1025 mesh = &buf_mesh[currentmesh++];
1026 *mesh = *transmesh; // copy mesh properties
1028 mesh->firstvert = currentvertex;
1029 memcpy(&buf_vertex[currentvertex], &buf_transvertex[transmesh->firstvert], transmesh->verts * sizeof(buf_vertex_t));
1030 memcpy(&buf_fcolor[currentvertex], &buf_transfcolor[transmesh->firstvert], transmesh->verts * sizeof(buf_fcolor_t));
1031 for (i = 0;i < backendunits && transmesh->textures[i];i++)
1032 memcpy(&buf_texcoord[i][currentvertex], &buf_transtexcoord[i][transmesh->firstvert], transmesh->verts * sizeof(buf_texcoord_t));
1033 currentvertex += mesh->verts;
1035 mesh->firsttriangle = currenttriangle;
1036 for (tri = transmesh->transchain;tri;tri = tri->meshsortchain)
1038 buf_tri[currenttriangle].index[0] = tri->index[0];
1039 buf_tri[currenttriangle].index[1] = tri->index[1];
1040 buf_tri[currenttriangle].index[2] = tri->index[2];
1043 mesh->triangles = currenttriangle - mesh->firsttriangle;
1046 currenttransmesh = 0;
1047 currenttranstriangle = 0;
1048 currenttransvertex = 0;
1051 void R_Mesh_Draw(const rmeshinfo_t *m)
1053 // these are static because gcc runs out of virtual registers otherwise
1054 static int i, j, overbright, *index;
1055 static float *in, scaler;
1056 static float cr, cg, cb, ca;
1057 static buf_mesh_t *mesh;
1058 static buf_vertex_t *vert;
1059 static buf_fcolor_t *fcolor;
1060 static buf_texcoord_t *texcoord[MAX_TEXTUREUNITS];
1063 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1065 if (m->index == NULL
1067 || m->vertex == NULL
1069 Host_Error("R_Mesh_Draw: no triangles or verts\n");
1071 // ignore meaningless alpha meshs
1072 if (!m->depthwrite && m->blendfunc1 == GL_SRC_ALPHA && (m->blendfunc2 == GL_ONE || m->blendfunc2 == GL_ONE_MINUS_SRC_ALPHA))
1076 for (i = 0, in = m->color + 3;i < m->numverts;i++, (int)in += m->colorstep)
1079 if (i == m->numverts)
1082 else if (m->ca < 0.01f)
1087 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1090 for (i = 0;i < m->numtriangles * 3;i++)
1091 if ((unsigned int) m->index[i] >= (unsigned int) m->numverts)
1092 Host_Error("R_Mesh_Draw: invalid index (%i of %i verts)\n", m->index, m->numverts);
1095 // FIXME: we can work around this by falling back on non-array renderer if buffers are too big
1096 if (m->numtriangles > 1024 || m->numverts > 3072)
1098 Con_Printf("R_Mesh_Draw: mesh too big for 3DFX drivers, rejected\n");
1102 if (m->numtriangles > max_meshs || m->numverts > max_verts)
1104 Con_Printf("R_Mesh_Draw: mesh too big for current gl_mesh_maxtriangles setting, rejected\n");
1111 if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
1115 Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
1122 c_transtris += m->numtriangles;
1123 vert = &buf_transvertex[currenttransvertex];
1124 fcolor = &buf_transfcolor[currenttransvertex];
1125 for (i = 0;i < backendunits;i++)
1126 texcoord[i] = &buf_transtexcoord[i][currenttransvertex];
1128 // transmesh is only for storage of transparent meshs until they
1129 // are inserted into the main mesh array
1130 mesh = &buf_transmesh[currenttransmesh++];
1131 mesh->firsttriangle = currenttranstriangle;
1132 mesh->firstvert = currenttransvertex;
1133 index = &buf_transtri[currenttranstriangle].index[0];
1135 currenttranstriangle += m->numtriangles;
1136 currenttransvertex += m->numverts;
1140 if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
1144 c_meshtris += m->numtriangles;
1145 vert = &buf_vertex[currentvertex];
1146 fcolor = &buf_fcolor[currentvertex];
1147 for (i = 0;i < backendunits;i++)
1148 texcoord[i] = &buf_texcoord[i][currentvertex];
1150 // opaque meshs are rendered directly
1151 mesh = &buf_mesh[currentmesh++];
1152 mesh->firsttriangle = currenttriangle;
1153 mesh->firstvert = currentvertex;
1154 index = &buf_tri[currenttriangle].index[0];
1156 currenttriangle += m->numtriangles;
1157 currentvertex += m->numverts;
1160 // code shared for transparent and opaque meshs
1161 memcpy(index, m->index, sizeof(int[3]) * m->numtriangles);
1162 mesh->blendfunc1 = m->blendfunc1;
1163 mesh->blendfunc2 = m->blendfunc2;
1164 mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
1165 mesh->depthtest = !m->depthdisable;
1166 mesh->triangles = m->numtriangles;
1167 mesh->verts = m->numverts;
1171 if (m->blendfunc2 == GL_SRC_COLOR)
1173 if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
1180 overbright = gl_combine.integer;
1184 scaler *= overbrightscale;
1189 for (i = 0;i < backendunits;i++)
1191 if ((mesh->textures[i] = m->tex[i]))
1193 mesh->texturergbscale[i] = m->texrgbscale[i];
1194 if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
1195 mesh->texturergbscale[i] = 1;
1197 if (overbright && j >= 0)
1198 mesh->texturergbscale[j] = 4;
1200 if (m->vertexstep != sizeof(buf_vertex_t))
1202 for (i = 0, in = m->vertex;i < m->numverts;i++, (int)in += m->vertexstep)
1204 vert[i].v[0] = in[0];
1205 vert[i].v[1] = in[1];
1206 vert[i].v[2] = in[2];
1210 memcpy(vert, m->vertex, m->numverts * sizeof(buf_vertex_t));
1214 for (i = 0, in = m->color;i < m->numverts;i++, (int)in += m->colorstep)
1216 fcolor[i].c[0] = in[0] * scaler;
1217 fcolor[i].c[1] = in[1] * scaler;
1218 fcolor[i].c[2] = in[2] * scaler;
1219 fcolor[i].c[3] = in[3];
1224 cr = m->cr * scaler;
1225 cg = m->cg * scaler;
1226 cb = m->cb * scaler;
1228 for (i = 0;i < m->numverts;i++)
1230 fcolor[i].c[0] = cr;
1231 fcolor[i].c[1] = cg;
1232 fcolor[i].c[2] = cb;
1233 fcolor[i].c[3] = ca;
1237 for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
1239 if (j >= backendunits)
1240 Sys_Error("R_Mesh_Draw: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
1241 if (m->texcoordstep[j] != sizeof(buf_texcoord_t))
1243 for (i = 0, in = m->texcoords[j];i < m->numverts;i++, (int)in += m->texcoordstep[j])
1245 texcoord[j][i].t[0] = in[0];
1246 texcoord[j][i].t[1] = in[1];
1250 memcpy(&texcoord[j][0].t[0], m->texcoords[j], m->numverts * sizeof(buf_texcoord_t));
1253 for (;j < backendunits;j++)
1254 memset(&texcoord[j][0].t[0], 0, m->numverts * sizeof(buf_texcoord_t));
1258 void R_Mesh_Draw_NativeOnly(const rmeshinfo_t *m)
1260 // these are static because gcc runs out of virtual registers otherwise
1261 static int i, j, overbright, *index;
1262 static float *in, scaler;
1263 static buf_mesh_t *mesh;
1264 static buf_vertex_t *vert;
1265 static buf_fcolor_t *fcolor;
1266 static buf_texcoord_t *texcoord[MAX_TEXTUREUNITS];
1269 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1271 if (m->index == NULL
1273 || m->vertex == NULL
1275 Host_Error("R_Mesh_Draw: no triangles or verts\n");
1277 // ignore meaningless alpha meshs
1278 if (!m->depthwrite && m->blendfunc1 == GL_SRC_ALPHA && (m->blendfunc2 == GL_ONE || m->blendfunc2 == GL_ONE_MINUS_SRC_ALPHA))
1282 for (i = 0, in = m->color + 3;i < m->numverts;i++, (int)in += m->colorstep)
1285 if (i == m->numverts)
1288 else if (m->ca < 0.01f)
1292 // FIXME: we can work around this by falling back on non-array renderer if buffers are too big
1293 if (m->numtriangles > 1024 || m->numverts > 3072)
1295 Con_Printf("R_Mesh_Draw_NativeOnly: mesh too big for 3DFX drivers, rejected\n");
1299 if (m->numtriangles > max_meshs || m->numverts > max_verts)
1301 Con_Printf("R_Mesh_Draw_NativeOnly: mesh too big for current gl_mesh_maxtriangles setting, rejected\n");
1308 if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
1312 Con_Printf("R_Mesh_Draw_NativeOnly: ran out of room for transparent meshs\n");
1319 c_transtris += m->numtriangles;
1320 vert = &buf_transvertex[currenttransvertex];
1321 fcolor = &buf_transfcolor[currenttransvertex];
1322 for (i = 0;i < backendunits;i++)
1323 texcoord[i] = &buf_transtexcoord[i][currenttransvertex];
1325 // transmesh is only for storage of transparent meshs until they
1326 // are inserted into the main mesh array
1327 mesh = &buf_transmesh[currenttransmesh++];
1328 mesh->firsttriangle = currenttranstriangle;
1329 mesh->firstvert = currenttransvertex;
1330 index = &buf_transtri[currenttranstriangle].index[0];
1331 currenttranstriangle += m->numtriangles;
1332 currenttransvertex += m->numverts;
1336 if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
1340 c_meshtris += m->numtriangles;
1341 vert = &buf_vertex[currentvertex];
1342 fcolor = &buf_fcolor[currentvertex];
1343 for (i = 0;i < backendunits;i++)
1344 texcoord[i] = &buf_texcoord[i][currentvertex];
1346 // opaque meshs are rendered directly
1347 mesh = &buf_mesh[currentmesh++];
1348 mesh->firsttriangle = currenttriangle;
1349 mesh->firstvert = currentvertex;
1350 index = &buf_tri[currenttriangle].index[0];
1351 currenttriangle += m->numtriangles;
1352 currentvertex += m->numverts;
1355 // code shared for transparent and opaque meshs
1356 memcpy(index, m->index, sizeof(int[3]) * m->numtriangles);
1357 mesh->blendfunc1 = m->blendfunc1;
1358 mesh->blendfunc2 = m->blendfunc2;
1359 mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
1360 mesh->depthtest = !m->depthdisable;
1361 mesh->triangles = m->numtriangles;
1362 mesh->verts = m->numverts;
1366 if (m->blendfunc2 == GL_SRC_COLOR)
1368 if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
1375 overbright = gl_combine.integer;
1379 scaler *= overbrightscale;
1383 for (i = 0;i < backendunits;i++)
1385 if ((mesh->textures[i] = m->tex[i]))
1387 mesh->texturergbscale[i] = m->texrgbscale[i];
1388 if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
1389 mesh->texturergbscale[i] = 1;
1391 if (overbright && j >= 0)
1392 mesh->texturergbscale[j] = 4;
1394 if (m->vertexstep != sizeof(buf_vertex_t))
1395 Host_Error("R_Mesh_Draw_NativeOnly: unsupported vertexstep\n");
1396 if (m->colorstep != sizeof(buf_fcolor_t))
1397 Host_Error("R_Mesh_Draw_NativeOnly: unsupported colorstep\n");
1398 if (m->color == NULL)
1399 Host_Error("R_Mesh_Draw_NativeOnly: must provide color array\n");
1400 for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
1402 if (j >= backendunits)
1403 Sys_Error("R_Mesh_Draw_NativeOnly: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
1404 if (m->texcoordstep[j] != sizeof(buf_texcoord_t))
1405 Host_Error("R_Mesh_Draw_NativeOnly: unsupported texcoordstep\n");
1408 memcpy(vert, m->vertex, m->numverts * sizeof(buf_vertex_t));
1409 for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
1410 memcpy(&texcoord[j][0].t[0], m->texcoords[j], m->numverts * sizeof(buf_texcoord_t));
1412 for (;j < backendunits;j++)
1413 memset(&texcoord[j][0].t[0], 0, m->numverts * sizeof(buf_texcoord_t));
1416 memcpy(fcolor, m->color, m->numverts * sizeof(buf_fcolor_t));
1418 // do this as a second step because memcpy preloaded the cache, which we can't easily do
1421 for (i = 0;i < m->numverts;i++)
1423 fcolor[i].c[0] *= scaler;
1424 fcolor[i].c[1] *= scaler;
1425 fcolor[i].c[2] *= scaler;
1430 // allocates space in geometry buffers, and fills in pointers to the buffers in passsed struct
1431 // (this is used for very high speed rendering, no copying)
1432 int R_Mesh_Draw_GetBuffer(rmeshbufferinfo_t *m)
1434 // these are static because gcc runs out of virtual registers otherwise
1435 int i, j, overbright;
1440 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1442 if (!m->numtriangles
1444 Host_Error("R_Mesh_Draw: no triangles or verts\n");
1446 // FIXME: we can work around this by falling back on non-array renderer if buffers are too big
1447 if (m->numtriangles > 1024 || m->numverts > 3072)
1449 Con_Printf("R_Mesh_Draw_GetBuffer: mesh too big for 3DFX drivers, rejected\n");
1453 if (m->numtriangles > max_meshs || m->numverts > max_verts)
1455 Con_Printf("R_Mesh_Draw_GetBuffer: mesh too big for current gl_mesh_maxtriangles setting, rejected\n");
1462 if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
1466 Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
1473 c_transtris += m->numtriangles;
1474 m->index = &buf_transtri[currenttranstriangle].index[0];
1475 m->vertex = &buf_transvertex[currenttransvertex].v[0];
1476 m->color = &buf_transfcolor[currenttransvertex].c[0];
1477 for (i = 0;i < backendunits;i++)
1478 m->texcoords[i] = &buf_transtexcoord[i][currenttransvertex].t[0];
1480 // transmesh is only for storage of transparent meshs until they
1481 // are inserted into the main mesh array
1482 mesh = &buf_transmesh[currenttransmesh++];
1483 mesh->firsttriangle = currenttranstriangle;
1484 mesh->firstvert = currenttransvertex;
1485 currenttranstriangle += m->numtriangles;
1486 currenttransvertex += m->numverts;
1490 if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
1494 c_meshtris += m->numtriangles;
1495 m->index = &buf_tri[currenttriangle].index[0];
1496 m->vertex = &buf_vertex[currentvertex].v[0];
1497 m->color = &buf_fcolor[currentvertex].c[0];
1498 for (i = 0;i < backendunits;i++)
1499 m->texcoords[i] = &buf_texcoord[i][currentvertex].t[0];
1501 // opaque meshs are rendered directly
1502 mesh = &buf_mesh[currentmesh++];
1503 mesh->firsttriangle = currenttriangle;
1504 mesh->firstvert = currentvertex;
1505 currenttriangle += m->numtriangles;
1506 currentvertex += m->numverts;
1509 // code shared for transparent and opaque meshs
1510 mesh->blendfunc1 = m->blendfunc1;
1511 mesh->blendfunc2 = m->blendfunc2;
1512 mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
1513 mesh->depthtest = !m->depthdisable;
1514 mesh->triangles = m->numtriangles;
1515 mesh->verts = m->numverts;
1519 if (m->blendfunc2 == GL_SRC_COLOR)
1521 if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
1528 overbright = gl_combine.integer;
1532 scaler *= overbrightscale;
1534 m->colorscale = scaler;
1537 for (i = 0;i < MAX_TEXTUREUNITS;i++)
1539 if ((mesh->textures[i] = m->tex[i]))
1542 if (i >= backendunits)
1543 Sys_Error("R_Mesh_Draw_GetBuffer: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
1545 mesh->texturergbscale[i] = m->texrgbscale[i];
1546 if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
1547 mesh->texturergbscale[i] = 1;
1549 if (overbright && j >= 0)
1550 mesh->texturergbscale[j] = 4;
1555 void R_Mesh_DrawPolygon(rmeshinfo_t *m, int numverts)
1557 m->index = polyindexarray;
1558 m->numverts = numverts;
1559 m->numtriangles = numverts - 2;
1560 if (m->numtriangles < 1)
1562 Con_Printf("R_Mesh_DrawPolygon: invalid vertex count\n");
1565 if (m->numtriangles >= 256)
1567 Con_Printf("R_Mesh_DrawPolygon: only up to 256 triangles (258 verts) supported\n");
1574 ==============================================================================
1578 ==============================================================================
1581 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
1587 if (!r_render.integer)
1590 buffer = Mem_Alloc(tempmempool, width*height*3);
1591 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
1594 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
1595 if (v_hwgamma.integer)
1596 for (i = 0;i < width * height * 3;i++)
1597 buffer[i] <<= v_overbrightbits.integer;
1599 ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
1605 //=============================================================================
1607 void R_ClearScreen(void)
1609 if (r_render.integer)
1612 qglClearColor(0,0,0,0);CHECKGLERROR
1614 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);CHECKGLERROR
1615 // set dithering mode
1616 if (gl_dither.integer)
1618 qglEnable(GL_DITHER);CHECKGLERROR
1622 qglDisable(GL_DITHER);CHECKGLERROR
1631 This is called every frame, and can also be called explicitly to flush
1635 void SCR_UpdateScreen (void)
1637 //Mem_CheckSentinelsGlobal();
1638 //R_TimeReport("memtest");
1642 R_TimeReport("finish");
1644 if (gl_combine.integer && !gl_combine_extension)
1645 Cvar_SetValue("gl_combine", 0);
1647 lightscalebit = v_overbrightbits.integer;
1648 if (gl_combine.integer && r_multitexture.integer)
1651 lightscale = 1.0f / (float) (1 << lightscalebit);
1652 overbrightscale = 1.0f / (float) (1 << v_overbrightbits.integer);
1654 R_TimeReport("setup");
1658 R_TimeReport("clear");
1660 if (scr_conlines < vid.conheight)
1666 // tell driver to commit it's partially full geometry queue to the rendering queue
1667 // (this doesn't wait for the commands themselves to complete)