6 cvar_t gl_mesh_drawrangeelements = {0, "gl_mesh_drawrangeelements", "1"};
7 cvar_t gl_mesh_testarrayelement = {0, "gl_mesh_testarrayelement", "0"};
8 cvar_t gl_mesh_testmanualfeeding = {0, "gl_mesh_testmanualfeeding", "0"};
9 cvar_t gl_delayfinish = {CVAR_SAVE, "gl_delayfinish", "0"};
10 cvar_t gl_paranoid = {0, "gl_paranoid", "0"};
11 cvar_t gl_printcheckerror = {0, "gl_printcheckerror", "0"};
13 cvar_t r_render = {0, "r_render", "1"};
14 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1"}; // whether or not to use dithering
15 cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
17 int gl_maxdrawrangeelementsvertices;
18 int gl_maxdrawrangeelementsindices;
23 void GL_PrintError(int errornumber, char *filename, int linenumber)
27 #ifdef GL_INVALID_ENUM
29 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
32 #ifdef GL_INVALID_VALUE
33 case GL_INVALID_VALUE:
34 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
37 #ifdef GL_INVALID_OPERATION
38 case GL_INVALID_OPERATION:
39 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
42 #ifdef GL_STACK_OVERFLOW
43 case GL_STACK_OVERFLOW:
44 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
47 #ifdef GL_STACK_UNDERFLOW
48 case GL_STACK_UNDERFLOW:
49 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
52 #ifdef GL_OUT_OF_MEMORY
53 case GL_OUT_OF_MEMORY:
54 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
57 #ifdef GL_TABLE_TOO_LARGE
58 case GL_TABLE_TOO_LARGE:
59 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
63 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
69 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active\n");
71 int c_meshs, c_meshelements;
73 void SCR_ScreenShot_f (void);
75 static matrix4x4_t backend_viewmatrix;
76 static matrix4x4_t backend_modelmatrix;
77 static matrix4x4_t backend_modelviewmatrix;
78 static matrix4x4_t backend_glmodelviewmatrix;
79 static matrix4x4_t backend_projectmatrix;
81 static int backendunits, backendactive;
82 static mempool_t *gl_backend_mempool;
85 note: here's strip order for a terrain row:
92 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
94 *elements++ = i + row;
96 *elements++ = i + row + 1;
99 *elements++ = i + row + 1;
102 for (y = 0;y < rows - 1;y++)
104 for (x = 0;x < columns - 1;x++)
107 *elements++ = i + columns;
109 *elements++ = i + columns + 1;
112 *elements++ = i + columns + 1;
123 for (y = 0;y < rows - 1;y++)
125 for (x = 0;x < columns - 1;x++)
129 *elements++ = i + columns;
130 *elements++ = i + columns + 1;
131 *elements++ = i + columns;
132 *elements++ = i + columns + 1;
138 int polygonelements[768];
140 static void R_Mesh_CacheArray_Startup(void);
141 static void R_Mesh_CacheArray_Shutdown(void);
142 void GL_Backend_AllocArrays(void)
144 if (!gl_backend_mempool)
145 gl_backend_mempool = Mem_AllocPool("GL_Backend");
146 R_Mesh_CacheArray_Startup();
149 void GL_Backend_FreeArrays(void)
151 R_Mesh_CacheArray_Shutdown();
152 Mem_FreePool(&gl_backend_mempool);
155 static void gl_backend_start(void)
157 Con_DPrintf("OpenGL Backend started\n");
158 if (qglDrawRangeElements != NULL)
161 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
163 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
165 Con_DPrintf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
168 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
170 GL_Backend_AllocArrays();
172 backendactive = true;
175 static void gl_backend_shutdown(void)
178 backendactive = false;
180 Con_DPrintf("OpenGL Backend shutting down\n");
182 GL_Backend_FreeArrays();
185 static void gl_backend_newmap(void)
189 void gl_backend_init(void)
193 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
195 polygonelements[i * 3 + 0] = 0;
196 polygonelements[i * 3 + 1] = i + 1;
197 polygonelements[i * 3 + 2] = i + 2;
200 Cvar_RegisterVariable(&r_render);
201 Cvar_RegisterVariable(&gl_dither);
202 Cvar_RegisterVariable(&gl_lockarrays);
203 Cvar_RegisterVariable(&gl_delayfinish);
204 Cvar_RegisterVariable(&gl_paranoid);
205 Cvar_RegisterVariable(&gl_printcheckerror);
207 Cvar_SetValue("r_render", 0);
210 Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
211 Cvar_RegisterVariable(&gl_mesh_testarrayelement);
212 Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
213 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
216 void GL_SetupView_ViewPort (int x, int y, int width, int height)
218 if (!r_render.integer)
221 // y is weird beause OpenGL is bottom to top, we use top to bottom
222 qglViewport(x, vid.realheight - (y + height), width, height);
226 void GL_SetupView_Orientation_Identity (void)
228 Matrix4x4_CreateIdentity(&backend_viewmatrix);
229 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
232 void GL_SetupView_Orientation_FromEntity (vec3_t origin, vec3_t angles)
234 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
235 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
236 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
237 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
238 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
239 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
240 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
243 void GL_SetupView_Mode_Perspective (double fovx, double fovy, double zNear, double zFar)
247 if (!r_render.integer)
251 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
252 qglLoadIdentity();CHECKGLERROR
254 xmax = zNear * tan(fovx * M_PI / 360.0);
255 ymax = zNear * tan(fovy * M_PI / 360.0);
257 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
258 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
259 GL_SetupView_Orientation_Identity();
262 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
266 if (!r_render.integer)
270 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
271 qglLoadIdentity();CHECKGLERROR
273 nudge = 1.0 - 1.0 / (1<<23);
274 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
279 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
288 m[14] = -2 * zNear * nudge;
291 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
292 GL_SetupView_Orientation_Identity();
293 backend_projectmatrix.m[0][0] = m[0];
294 backend_projectmatrix.m[1][0] = m[1];
295 backend_projectmatrix.m[2][0] = m[2];
296 backend_projectmatrix.m[3][0] = m[3];
297 backend_projectmatrix.m[0][1] = m[4];
298 backend_projectmatrix.m[1][1] = m[5];
299 backend_projectmatrix.m[2][1] = m[6];
300 backend_projectmatrix.m[3][1] = m[7];
301 backend_projectmatrix.m[0][2] = m[8];
302 backend_projectmatrix.m[1][2] = m[9];
303 backend_projectmatrix.m[2][2] = m[10];
304 backend_projectmatrix.m[3][2] = m[11];
305 backend_projectmatrix.m[0][3] = m[12];
306 backend_projectmatrix.m[1][3] = m[13];
307 backend_projectmatrix.m[2][3] = m[14];
308 backend_projectmatrix.m[3][3] = m[15];
311 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
313 if (!r_render.integer)
317 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
318 qglLoadIdentity();CHECKGLERROR
319 qglOrtho(x1, x2, y2, y1, zNear, zFar);
320 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
321 GL_SetupView_Orientation_Identity();
324 typedef struct gltextureunit_s
326 int t1d, t2d, t3d, tcubemap;
329 const void *pointer_texcoord;
330 float rgbscale, alphascale;
331 int combinergb, combinealpha;
332 // FIXME: add more combine stuff
347 gltextureunit_t units[MAX_TEXTUREUNITS];
351 const void *pointer_vertex;
352 const void *pointer_color;
356 void GL_SetupTextureState(void)
359 gltextureunit_t *unit;
361 gl_state.clientunit = -1;
362 for (i = 0;i < backendunits;i++)
365 GL_ClientActiveTexture(i);
366 unit = gl_state.units + i;
371 unit->pointer_texcoord = NULL;
373 unit->alphascale = 1;
374 unit->combinergb = GL_MODULATE;
375 unit->combinealpha = GL_MODULATE;
377 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
378 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
380 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
381 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
384 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
386 if (gl_texturecubemap)
388 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
390 if (gl_combine.integer)
392 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
393 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
394 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
395 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
396 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
397 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
398 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
399 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
400 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
401 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
402 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
403 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
404 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
405 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
406 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
407 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
408 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
412 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
417 void GL_Backend_ResetState(void)
419 memset(&gl_state, 0, sizeof(gl_state));
420 gl_state.depthtest = true;
421 gl_state.blendfunc1 = GL_ONE;
422 gl_state.blendfunc2 = GL_ZERO;
423 gl_state.blend = false;
424 gl_state.depthmask = GL_TRUE;
425 gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
426 gl_state.lockrange_first = 0;
427 gl_state.lockrange_count = 0;
428 gl_state.pointer_vertex = NULL;
429 gl_state.pointer_color = NULL;
433 qglEnable(GL_CULL_FACE);CHECKGLERROR
434 qglCullFace(GL_FRONT);CHECKGLERROR
435 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
436 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
437 qglDisable(GL_BLEND);CHECKGLERROR
438 qglDepthMask(gl_state.depthmask);CHECKGLERROR
440 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
441 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
443 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
444 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
446 GL_Color(0, 0, 0, 0);
447 GL_Color(1, 1, 1, 1);
449 GL_SetupTextureState();
452 void GL_ActiveTexture(int num)
454 if (gl_state.unit != num)
457 if (qglActiveTexture)
459 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
465 void GL_ClientActiveTexture(int num)
467 if (gl_state.clientunit != num)
469 gl_state.clientunit = num;
470 if (qglActiveTexture)
472 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
478 void GL_BlendFunc(int blendfunc1, int blendfunc2)
480 if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
482 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
483 if (gl_state.blendfunc2 == GL_ZERO)
485 if (gl_state.blendfunc1 == GL_ONE)
490 qglDisable(GL_BLEND);CHECKGLERROR
498 qglEnable(GL_BLEND);CHECKGLERROR
507 qglEnable(GL_BLEND);CHECKGLERROR
513 void GL_DepthMask(int state)
515 if (gl_state.depthmask != state)
517 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
521 void GL_DepthTest(int state)
523 if (gl_state.depthtest != state)
525 gl_state.depthtest = state;
526 if (gl_state.depthtest)
528 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
532 qglDisable(GL_DEPTH_TEST);CHECKGLERROR
537 void GL_VertexPointer(const float *p)
539 if (gl_state.pointer_vertex != p)
541 gl_state.pointer_vertex = p;
543 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), gl_state.pointer_vertex);
548 void GL_ColorPointer(const float *p)
550 if (gl_state.pointer_color != p)
553 if (!gl_state.pointer_color)
555 qglEnableClientState(GL_COLOR_ARRAY);
560 qglDisableClientState(GL_COLOR_ARRAY);
563 gl_state.pointer_color = p;
564 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), gl_state.pointer_color);
569 void GL_Color(float cr, float cg, float cb, float ca)
571 if (gl_state.pointer_color || gl_state.color4f[0] != cr || gl_state.color4f[1] != cg || gl_state.color4f[2] != cb || gl_state.color4f[3] != ca)
573 GL_ColorPointer(NULL);
574 gl_state.color4f[0] = cr;
575 gl_state.color4f[1] = cg;
576 gl_state.color4f[2] = cb;
577 gl_state.color4f[3] = ca;
579 qglColor4f(cr, cg, cb, ca);
584 void GL_LockArrays(int first, int count)
586 if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
588 if (gl_state.lockrange_count)
590 gl_state.lockrange_count = 0;
592 qglUnlockArraysEXT();
595 if (count && gl_supportslockarrays && gl_lockarrays.integer)
597 gl_state.lockrange_first = first;
598 gl_state.lockrange_count = count;
600 qglLockArraysEXT(first, count);
606 void GL_Scissor (int x, int y, int width, int height)
609 qglScissor(x, vid.realheight - (y + height),width,height);
613 void GL_ScissorTest(int state)
615 if(gl_state.scissortest == state)
619 if((gl_state.scissortest = state))
620 qglEnable(GL_SCISSOR_TEST);
622 qglDisable(GL_SCISSOR_TEST);
626 void GL_TransformToScreen(const vec4_t in, vec4_t out)
630 Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
631 Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
633 out[0] = r_refdef.x + (out[0] * iw + 1.0f) * r_refdef.width * 0.5f;
634 out[1] = r_refdef.y + (out[1] * iw + 1.0f) * r_refdef.height * 0.5f;
635 out[2] = out[2] * iw;
638 // called at beginning of frame
639 void R_Mesh_Start(void)
643 GL_Backend_ResetState();
646 int gl_backend_rebindtextures;
648 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
653 for (i = 0;i < count;i++)
654 *out++ = *in++ + offset;
657 memcpy(out, in, sizeof(*out) * count);
660 // renders triangles using vertices from the active arrays
661 int paranoidblah = 0;
662 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
664 int numelements = numtriangles * 3;
665 if (numverts == 0 || numtriangles == 0)
667 Con_Printf("R_Mesh_Draw(%d, %d, %08p);\n", numverts, numtriangles, elements);
671 c_meshelements += numelements;
673 if (r_render.integer)
675 if (gl_paranoid.integer)
679 if (!qglIsEnabled(GL_VERTEX_ARRAY))
680 Con_Printf("R_Mesh_Draw: vertex array not enabled\n");
681 for (j = 0, size = numverts * (int)sizeof(float[3]), p = gl_state.pointer_vertex;j < size;j += sizeof(int), p++)
683 if (gl_state.pointer_color)
685 if (!qglIsEnabled(GL_COLOR_ARRAY))
686 Con_Printf("R_Mesh_Draw: color array set but not enabled\n");
687 for (j = 0, size = numverts * (int)sizeof(float[4]), p = gl_state.pointer_color;j < size;j += sizeof(int), p++)
690 for (i = 0;i < backendunits;i++)
692 if (gl_state.units[i].t1d || gl_state.units[i].t2d || gl_state.units[i].t3d || gl_state.units[i].tcubemap || gl_state.units[i].arrayenabled)
694 if (gl_state.units[i].arrayenabled && !(gl_state.units[i].t1d || gl_state.units[i].t2d || gl_state.units[i].t3d || gl_state.units[i].tcubemap))
695 Con_Printf("R_Mesh_Draw: array enabled but no texture bound\n");
697 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
698 Con_Printf("R_Mesh_Draw: texcoord array set but not enabled\n");
699 for (j = 0, size = numverts * ((gl_state.units[i].t3d || gl_state.units[i].tcubemap) ? (int)sizeof(float[3]) : (int)sizeof(float[2])), p = gl_state.units[i].pointer_texcoord;j < size;j += sizeof(int), p++)
703 for (i = 0;i < numtriangles * 3;i++)
705 if (elements[i] < 0 || elements[i] >= numverts)
707 Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range 0 - %i) in elements list\n", elements[i], numverts);
713 GL_LockArrays(0, numverts);
715 if (gl_mesh_testmanualfeeding.integer)
719 qglBegin(GL_TRIANGLES);
720 for (i = 0;i < numtriangles * 3;i++)
722 for (j = 0;j < backendunits;j++)
724 if (gl_state.units[j].pointer_texcoord)
726 if (backendunits > 1)
728 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
730 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
731 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
735 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
736 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
741 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
743 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
744 qglTexCoord3f(p[0], p[1], p[2]);
748 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
749 qglTexCoord2f(p[0], p[1]);
754 if (gl_state.pointer_color)
756 p = ((const GLfloat *)(gl_state.pointer_color)) + elements[i] * 4;
757 qglColor4f(p[0], p[1], p[2], p[3]);
759 p = ((const GLfloat *)(gl_state.pointer_vertex)) + elements[i] * 3;
760 qglVertex3f(p[0], p[1], p[2]);
765 else if (gl_mesh_testarrayelement.integer)
768 qglBegin(GL_TRIANGLES);
769 for (i = 0;i < numtriangles * 3;i++)
771 qglArrayElement(elements[i]);
776 else if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
778 qglDrawRangeElements(GL_TRIANGLES, 0, numverts, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
782 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
790 // restores backend state, used when done with 3D rendering
791 void R_Mesh_Finish(void)
799 for (i = backendunits - 1;i >= 0;i--)
801 if (qglActiveTexture)
802 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
803 if (qglClientActiveTexture)
804 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
805 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
806 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
807 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
810 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
812 if (gl_texturecubemap)
814 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
816 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
817 if (gl_combine.integer)
819 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
820 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
823 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
824 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
826 qglDisable(GL_BLEND);CHECKGLERROR
827 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
828 qglDepthMask(GL_TRUE);CHECKGLERROR
829 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
832 void R_Mesh_Matrix(const matrix4x4_t *matrix)
834 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
836 backend_modelmatrix = *matrix;
837 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
838 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
839 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
843 void R_Mesh_TextureMatrix(int unitnumber, const matrix4x4_t *matrix)
845 if (memcmp(&gl_state.units[unitnumber].matrix, matrix, sizeof(matrix4x4_t)))
847 matrix4x4_t tempmatrix;
848 gl_state.units[unitnumber].matrix = *matrix;
849 Matrix4x4_Transpose(&tempmatrix, &gl_state.units[unitnumber].matrix);
850 qglMatrixMode(GL_TEXTURE);
851 GL_ActiveTexture(unitnumber);
852 qglLoadMatrixf(&tempmatrix.m[0][0]);
853 qglMatrixMode(GL_MODELVIEW);
857 void R_Mesh_State_Texture(const rmeshstate_t *m)
859 int i, combinergb, combinealpha, scale, arrayis3d;
860 gltextureunit_t *unit;
864 if (gl_backend_rebindtextures)
866 gl_backend_rebindtextures = false;
867 GL_SetupTextureState();
870 for (i = 0, unit = gl_state.units;i < backendunits;i++, unit++)
872 if (unit->t1d != m->tex1d[i])
878 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
883 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
885 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
887 if (unit->t2d != m->tex[i])
893 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
898 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
900 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
902 if (unit->t3d != m->tex3d[i])
908 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
913 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
915 qglBindTexture(GL_TEXTURE_3D, (unit->t3d = m->tex3d[i]));CHECKGLERROR
917 if (unit->tcubemap != m->texcubemap[i])
920 if (m->texcubemap[i])
922 if (unit->tcubemap == 0)
923 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
928 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
930 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
932 combinergb = m->texcombinergb[i];
934 combinergb = GL_MODULATE;
935 if (unit->combinergb != combinergb)
938 unit->combinergb = combinergb;
939 if (gl_combine.integer)
941 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
945 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
948 combinealpha = m->texcombinealpha[i];
950 combinealpha = GL_MODULATE;
951 if (unit->combinealpha != combinealpha)
954 unit->combinealpha = combinealpha;
955 if (gl_combine.integer)
957 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
960 scale = max(m->texrgbscale[i], 1);
961 if (unit->rgbscale != scale)
964 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = scale));CHECKGLERROR
966 scale = max(m->texalphascale[i], 1);
967 if (unit->alphascale != scale)
970 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = scale));CHECKGLERROR
972 arrayis3d = unit->t3d || unit->tcubemap;
973 if (unit->pointer_texcoord != m->pointer_texcoord[i] || unit->arrayis3d != arrayis3d)
975 GL_ClientActiveTexture(i);
976 if (m->pointer_texcoord[i])
978 if (!unit->arrayenabled)
980 unit->arrayenabled = true;
981 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
986 if (unit->arrayenabled)
988 unit->arrayenabled = false;
989 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
992 unit->pointer_texcoord = m->pointer_texcoord[i];
993 unit->arrayis3d = arrayis3d;
995 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[3]), unit->pointer_texcoord);
997 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), unit->pointer_texcoord);
1003 void R_Mesh_Draw_ShowTris(int numverts, int numtriangles, int *elements)
1006 for (;numtriangles;numtriangles--, elements += 3)
1008 qglArrayElement(elements[0]);qglArrayElement(elements[1]);
1009 qglArrayElement(elements[1]);qglArrayElement(elements[2]);
1010 qglArrayElement(elements[2]);qglArrayElement(elements[0]);
1017 ==============================================================================
1021 ==============================================================================
1024 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height, qboolean jpeg)
1029 if (!r_render.integer)
1032 buffer = Mem_Alloc(tempmempool, width*height*3);
1033 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
1037 ret = JPEG_SaveImage_preflipped (filename, width, height, buffer);
1039 ret = Image_WriteTGARGB_preflipped (filename, width, height, buffer);
1045 //=============================================================================
1047 void R_ClearScreen(void)
1049 if (r_render.integer)
1052 qglClearColor(0,0,0,0);CHECKGLERROR
1053 qglClearDepth(1);CHECKGLERROR
1056 // LordHavoc: we use a stencil centered around 128 instead of 0,
1057 // to avoid clamping interfering with strange shadow volume
1059 qglClearStencil(128);CHECKGLERROR
1062 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));CHECKGLERROR
1063 // set dithering mode
1064 if (gl_dither.integer)
1066 qglEnable(GL_DITHER);CHECKGLERROR
1070 qglDisable(GL_DITHER);CHECKGLERROR
1079 This is called every frame, and can also be called explicitly to flush
1083 void SCR_UpdateScreen (void)
1085 if (gl_delayfinish.integer)
1089 R_TimeReport("finish");
1092 if (r_textureunits.integer > gl_textureunits)
1093 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
1094 if (r_textureunits.integer < 1)
1095 Cvar_SetValueQuick(&r_textureunits, 1);
1097 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
1098 Cvar_SetValueQuick(&gl_combine, 0);
1100 R_TimeReport("setup");
1104 R_TimeReport("clear");
1106 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
1112 if (gl_delayfinish.integer)
1114 // tell driver to commit it's partially full geometry queue to the rendering queue
1115 // (this doesn't wait for the commands themselves to complete)
1122 R_TimeReport("finish");
1127 //===========================================================================
1128 // dynamic vertex array buffer subsystem
1129 //===========================================================================
1131 float varray_vertex3f[65536*3];
1132 float varray_color4f[65536*4];
1133 float varray_texcoord2f[4][65536*2];
1134 float varray_texcoord3f[4][65536*3];
1135 float varray_normal3f[65536*3];
1136 int earray_element3i[65536];
1138 //===========================================================================
1139 // vertex array caching subsystem
1140 //===========================================================================
1142 typedef struct rcachearraylink_s
1144 struct rcachearraylink_s *next, *prev;
1145 struct rcachearrayitem_s *data;
1149 typedef struct rcachearrayitem_s
1151 // the original request structure
1152 rcachearrayrequest_t request;
1155 // offset into r_mesh_rcachedata
1157 // for linking this into the sequential list
1158 rcachearraylink_t sequentiallink;
1159 // for linking this into the lookup list
1160 rcachearraylink_t hashlink;
1164 #define RCACHEARRAY_HASHSIZE 65536
1165 #define RCACHEARRAY_ITEMS 4096
1166 #define RCACHEARRAY_DEFAULTSIZE (4 << 20)
1168 // all active items are linked into this chain in sorted order
1169 static rcachearraylink_t r_mesh_rcachesequentialchain;
1170 // all inactive items are linked into this chain in unknown order
1171 static rcachearraylink_t r_mesh_rcachefreechain;
1172 // all active items are also linked into these chains (using their hashlink)
1173 static rcachearraylink_t r_mesh_rcachechain[RCACHEARRAY_HASHSIZE];
1175 // all items are stored here, whether active or inactive
1176 static rcachearrayitem_t r_mesh_rcacheitems[RCACHEARRAY_ITEMS];
1178 // size of data buffer
1179 static int r_mesh_rcachedata_size = RCACHEARRAY_DEFAULTSIZE;
1181 static qbyte r_mesh_rcachedata[RCACHEARRAY_DEFAULTSIZE];
1184 static int r_mesh_rcachedata_offset;
1185 static rcachearraylink_t *r_mesh_rcachesequentialchain_current;
1187 static void R_Mesh_CacheArray_Startup(void)
1190 rcachearraylink_t *l;
1191 // prepare all the linked lists
1192 l = &r_mesh_rcachesequentialchain;l->next = l->prev = l;l->data = NULL;
1193 l = &r_mesh_rcachefreechain;l->next = l->prev = l;l->data = NULL;
1194 memset(&r_mesh_rcachechain, 0, sizeof(r_mesh_rcachechain));
1195 for (i = 0;i < RCACHEARRAY_HASHSIZE;i++)
1197 l = &r_mesh_rcachechain[i];
1198 l->next = l->prev = l;
1201 memset(&r_mesh_rcacheitems, 0, sizeof(r_mesh_rcacheitems));
1202 for (i = 0;i < RCACHEARRAY_ITEMS;i++)
1204 r_mesh_rcacheitems[i].hashlink.data = r_mesh_rcacheitems[i].sequentiallink.data = &r_mesh_rcacheitems[i];
1205 l = &r_mesh_rcacheitems[i].sequentiallink;
1206 l->next = &r_mesh_rcachefreechain;
1207 l->prev = l->next->prev;
1208 l->next->prev = l->prev->next = l;
1210 // clear other state
1211 r_mesh_rcachedata_offset = 0;
1212 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1215 static void R_Mesh_CacheArray_Shutdown(void)
1220 static void R_Mesh_CacheArray_ValidateState(int num)
1222 rcachearraylink_t *l, *lhead;
1223 lhead = &r_mesh_rcachesequentialchain;
1224 if (r_mesh_rcachesequentialchain_current == lhead)
1226 for (l = lhead->next;l != lhead;l = l->next)
1227 if (r_mesh_rcachesequentialchain_current == l)
1229 Sys_Error("%i", num);
1233 int R_Mesh_CacheArray(rcachearrayrequest_t *r)
1235 rcachearraylink_t *l, *lhead, *lnext;
1236 rcachearrayitem_t *d;
1237 int hashindex, offset, offsetend;
1239 //R_Mesh_CacheArray_ValidateState(3);
1240 // calculate a hashindex to choose a cache chain
1242 hashindex = CRC_Block((void *)r, sizeof(*r)) % RCACHEARRAY_HASHSIZE;
1244 // is it already cached?
1245 for (lhead = &r_mesh_rcachechain[hashindex], l = lhead->next;l != lhead;l = l->next)
1247 if (!memcmp(&l->data->request, r, sizeof(l->data->request)))
1249 // we have it cached already
1250 r->data = r_mesh_rcachedata + l->data->offset;
1255 // we need to add a new cache item, this means finding a place for the new
1256 // data and making sure we have a free item available, lots of work...
1258 // check if buffer needs to wrap
1259 if (r_mesh_rcachedata_offset + r->data_size > r_mesh_rcachedata_size)
1262 if (r->data_size * 10 > r_mesh_rcachedata_size)
1264 // realloc whole cache
1267 // reset back to start
1268 r_mesh_rcachedata_offset = 0;
1269 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1271 offset = r_mesh_rcachedata_offset;
1272 r_mesh_rcachedata_offset += r->data_size;
1273 offsetend = r_mesh_rcachedata_offset;
1274 //R_Mesh_CacheArray_ValidateState(4);
1279 for (lhead = &r_mesh_rcachesequentialchain, l = lhead->next, n = 0;l != lhead;l = l->next, n++);
1280 Con_Printf("R_Mesh_CacheArray: new data range %i:%i, %i items are already linked\n", offset, offsetend, n);
1284 // make room for the new data (remove old items)
1285 lhead = &r_mesh_rcachesequentialchain;
1286 l = r_mesh_rcachesequentialchain_current;
1289 while (l != lhead && l->data->offset < offsetend && l->data->offset + l->data->request.data_size > offset)
1291 //r_mesh_rcachesequentialchain_current = l;
1292 //R_Mesh_CacheArray_ValidateState(8);
1294 // if at the end of the chain, wrap around
1296 lnext = lnext->next;
1297 //r_mesh_rcachesequentialchain_current = lnext;
1298 //R_Mesh_CacheArray_ValidateState(10);
1300 // unlink from sequential chain
1301 l->next->prev = l->prev;
1302 l->prev->next = l->next;
1303 //R_Mesh_CacheArray_ValidateState(11);
1304 // link into free chain
1305 l->next = &r_mesh_rcachefreechain;
1306 l->prev = l->next->prev;
1307 l->next->prev = l->prev->next = l;
1308 //R_Mesh_CacheArray_ValidateState(12);
1310 l = &l->data->hashlink;
1311 // unlink from hash chain
1312 l->next->prev = l->prev;
1313 l->prev->next = l->next;
1316 //r_mesh_rcachesequentialchain_current = l;
1317 //R_Mesh_CacheArray_ValidateState(9);
1319 //r_mesh_rcachesequentialchain_current = l;
1320 //R_Mesh_CacheArray_ValidateState(5);
1321 // gobble an extra item if we have no free items available
1322 if (r_mesh_rcachefreechain.next == &r_mesh_rcachefreechain)
1326 // unlink from sequential chain
1327 l->next->prev = l->prev;
1328 l->prev->next = l->next;
1329 // link into free chain
1330 l->next = &r_mesh_rcachefreechain;
1331 l->prev = l->next->prev;
1332 l->next->prev = l->prev->next = l;
1334 l = &l->data->hashlink;
1335 // unlink from hash chain
1336 l->next->prev = l->prev;
1337 l->prev->next = l->next;
1341 r_mesh_rcachesequentialchain_current = l;
1342 //R_Mesh_CacheArray_ValidateState(6);
1344 // now take an item from the free chain
1345 l = r_mesh_rcachefreechain.next;
1351 l->next->prev = l->prev;
1352 l->prev->next = l->next;
1353 // relink to sequential
1354 l->next = r_mesh_rcachesequentialchain_current->prev;
1355 l->prev = l->next->prev;
1356 while (l->next->data && l->data && l->next->data->offset <= d->offset)
1358 //Con_Printf(">\n");
1359 l->next = l->next->next;
1360 l->prev = l->prev->next;
1362 while (l->prev->data && l->data && l->prev->data->offset >= d->offset)
1364 //Con_Printf("<\n");
1365 l->prev = l->prev->prev;
1366 l->next = l->next->prev;
1368 l->next->prev = l->prev->next = l;
1369 // also link into hash chain
1370 l = &l->data->hashlink;
1371 l->next = &r_mesh_rcachechain[hashindex];
1372 l->prev = l->next->prev;
1374 l->next->prev = l->prev->next = l;
1377 //r_mesh_rcachesequentialchain_current = d->sequentiallink.next;
1379 //R_Mesh_CacheArray_ValidateState(7);
1380 // and finally set the data pointer
1381 r->data = r_mesh_rcachedata + d->offset;
1382 // and tell the caller to fill the array