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 // these are externally accessible
76 int r_lightmapscalebit;
78 static matrix4x4_t backend_viewmatrix;
79 static matrix4x4_t backend_modelmatrix;
80 static matrix4x4_t backend_modelviewmatrix;
81 static matrix4x4_t backend_glmodelviewmatrix;
82 static matrix4x4_t backend_projectmatrix;
84 static int backendunits, backendactive;
85 static mempool_t *gl_backend_mempool;
88 note: here's strip order for a terrain row:
95 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
97 *elements++ = i + row;
99 *elements++ = i + row + 1;
102 *elements++ = i + row + 1;
105 for (y = 0;y < rows - 1;y++)
107 for (x = 0;x < columns - 1;x++)
110 *elements++ = i + columns;
112 *elements++ = i + columns + 1;
115 *elements++ = i + columns + 1;
126 for (y = 0;y < rows - 1;y++)
128 for (x = 0;x < columns - 1;x++)
132 *elements++ = i + columns;
133 *elements++ = i + columns + 1;
134 *elements++ = i + columns;
135 *elements++ = i + columns + 1;
141 int polygonelements[768];
143 static void R_Mesh_CacheArray_Startup(void);
144 static void R_Mesh_CacheArray_Shutdown(void);
145 void GL_Backend_AllocArrays(void)
147 if (!gl_backend_mempool)
148 gl_backend_mempool = Mem_AllocPool("GL_Backend");
149 R_Mesh_CacheArray_Startup();
152 void GL_Backend_FreeArrays(void)
154 R_Mesh_CacheArray_Shutdown();
155 Mem_FreePool(&gl_backend_mempool);
158 static void gl_backend_start(void)
160 Con_DPrintf("OpenGL Backend started\n");
161 if (qglDrawRangeElements != NULL)
164 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
166 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
168 Con_DPrintf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
171 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
173 GL_Backend_AllocArrays();
175 backendactive = true;
178 static void gl_backend_shutdown(void)
181 backendactive = false;
183 Con_DPrintf("OpenGL Backend shutting down\n");
185 GL_Backend_FreeArrays();
188 static void gl_backend_newmap(void)
192 void gl_backend_init(void)
196 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
198 polygonelements[i * 3 + 0] = 0;
199 polygonelements[i * 3 + 1] = i + 1;
200 polygonelements[i * 3 + 2] = i + 2;
203 Cvar_RegisterVariable(&r_render);
204 Cvar_RegisterVariable(&gl_dither);
205 Cvar_RegisterVariable(&gl_lockarrays);
206 Cvar_RegisterVariable(&gl_delayfinish);
207 Cvar_RegisterVariable(&gl_paranoid);
208 Cvar_RegisterVariable(&gl_printcheckerror);
210 Cvar_SetValue("r_render", 0);
213 Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
214 Cvar_RegisterVariable(&gl_mesh_testarrayelement);
215 Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
216 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
219 void GL_SetupView_ViewPort (int x, int y, int width, int height)
221 if (!r_render.integer)
224 // y is weird beause OpenGL is bottom to top, we use top to bottom
225 qglViewport(x, vid.realheight - (y + height), width, height);
229 void GL_SetupView_Orientation_Identity (void)
231 Matrix4x4_CreateIdentity(&backend_viewmatrix);
232 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
235 void GL_SetupView_Orientation_FromEntity (vec3_t origin, vec3_t angles)
237 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
238 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
239 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
240 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
241 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
242 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
243 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
246 void GL_SetupView_Mode_Perspective (double fovx, double fovy, double zNear, double zFar)
250 if (!r_render.integer)
254 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
255 qglLoadIdentity();CHECKGLERROR
257 xmax = zNear * tan(fovx * M_PI / 360.0);
258 ymax = zNear * tan(fovy * M_PI / 360.0);
260 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
261 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
262 GL_SetupView_Orientation_Identity();
265 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
269 if (!r_render.integer)
273 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
274 qglLoadIdentity();CHECKGLERROR
276 nudge = 1.0 - 1.0 / (1<<23);
277 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
282 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
291 m[14] = -2 * zNear * nudge;
294 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
295 GL_SetupView_Orientation_Identity();
296 backend_projectmatrix.m[0][0] = m[0];
297 backend_projectmatrix.m[1][0] = m[1];
298 backend_projectmatrix.m[2][0] = m[2];
299 backend_projectmatrix.m[3][0] = m[3];
300 backend_projectmatrix.m[0][1] = m[4];
301 backend_projectmatrix.m[1][1] = m[5];
302 backend_projectmatrix.m[2][1] = m[6];
303 backend_projectmatrix.m[3][1] = m[7];
304 backend_projectmatrix.m[0][2] = m[8];
305 backend_projectmatrix.m[1][2] = m[9];
306 backend_projectmatrix.m[2][2] = m[10];
307 backend_projectmatrix.m[3][2] = m[11];
308 backend_projectmatrix.m[0][3] = m[12];
309 backend_projectmatrix.m[1][3] = m[13];
310 backend_projectmatrix.m[2][3] = m[14];
311 backend_projectmatrix.m[3][3] = m[15];
314 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
316 if (!r_render.integer)
320 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
321 qglLoadIdentity();CHECKGLERROR
322 qglOrtho(x1, x2, y2, y1, zNear, zFar);
323 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
324 GL_SetupView_Orientation_Identity();
327 typedef struct gltextureunit_s
329 int t1d, t2d, t3d, tcubemap;
332 const void *pointer_texcoord;
333 float rgbscale, alphascale;
334 int combinergb, combinealpha;
335 // FIXME: add more combine stuff
349 gltextureunit_t units[MAX_TEXTUREUNITS];
353 const void *pointer_vertex;
354 const void *pointer_color;
358 void GL_SetupTextureState(void)
361 gltextureunit_t *unit;
363 gl_state.clientunit = -1;
364 for (i = 0;i < backendunits;i++)
367 GL_ClientActiveTexture(i);
368 unit = gl_state.units + i;
373 unit->pointer_texcoord = NULL;
375 unit->alphascale = 1;
376 unit->combinergb = GL_MODULATE;
377 unit->combinealpha = GL_MODULATE;
379 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
380 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
382 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
383 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
386 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
388 if (gl_texturecubemap)
390 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
392 if (gl_combine.integer)
394 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
395 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
396 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
397 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
398 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
399 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
400 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
401 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
402 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
403 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
404 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
405 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
406 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
407 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
408 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
409 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
410 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
414 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
419 void GL_Backend_ResetState(void)
421 memset(&gl_state, 0, sizeof(gl_state));
422 gl_state.depthtest = true;
423 gl_state.blendfunc1 = GL_ONE;
424 gl_state.blendfunc2 = GL_ZERO;
425 gl_state.blend = false;
426 gl_state.depthmask = GL_TRUE;
427 gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
428 gl_state.lockrange_first = 0;
429 gl_state.lockrange_count = 0;
430 gl_state.pointer_vertex = NULL;
431 gl_state.pointer_color = NULL;
435 qglEnable(GL_CULL_FACE);CHECKGLERROR
436 qglCullFace(GL_FRONT);CHECKGLERROR
437 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
438 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
439 qglDisable(GL_BLEND);CHECKGLERROR
440 qglDepthMask(gl_state.depthmask);CHECKGLERROR
442 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
443 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
445 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
446 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
448 GL_Color(0, 0, 0, 0);
449 GL_Color(1, 1, 1, 1);
451 GL_SetupTextureState();
454 void GL_ActiveTexture(int num)
456 if (gl_state.unit != num)
459 if (qglActiveTexture)
461 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
467 void GL_ClientActiveTexture(int num)
469 if (gl_state.clientunit != num)
471 gl_state.clientunit = num;
472 if (qglActiveTexture)
474 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
480 void GL_BlendFunc(int blendfunc1, int blendfunc2)
482 if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
484 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
485 if (gl_state.blendfunc2 == GL_ZERO)
487 if (gl_state.blendfunc1 == GL_ONE)
492 qglDisable(GL_BLEND);CHECKGLERROR
500 qglEnable(GL_BLEND);CHECKGLERROR
509 qglEnable(GL_BLEND);CHECKGLERROR
515 void GL_DepthMask(int state)
517 if (gl_state.depthmask != state)
519 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
523 void GL_DepthTest(int state)
525 if (gl_state.depthtest != state)
527 gl_state.depthtest = state;
528 if (gl_state.depthtest)
530 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
534 qglDisable(GL_DEPTH_TEST);CHECKGLERROR
539 void GL_VertexPointer(const float *p)
541 if (gl_state.pointer_vertex != p)
543 gl_state.pointer_vertex = p;
545 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), gl_state.pointer_vertex);
550 void GL_ColorPointer(const float *p)
552 if (gl_state.pointer_color != p)
555 if (!gl_state.pointer_color)
557 qglEnableClientState(GL_COLOR_ARRAY);
562 qglDisableClientState(GL_COLOR_ARRAY);
565 gl_state.pointer_color = p;
566 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), gl_state.pointer_color);
571 void GL_Color(float cr, float cg, float cb, float ca)
573 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)
575 GL_ColorPointer(NULL);
576 gl_state.color4f[0] = cr;
577 gl_state.color4f[1] = cg;
578 gl_state.color4f[2] = cb;
579 gl_state.color4f[3] = ca;
581 qglColor4f(cr, cg, cb, ca);
586 void GL_LockArrays(int first, int count)
588 if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
590 if (gl_state.lockrange_count)
592 gl_state.lockrange_count = 0;
594 qglUnlockArraysEXT();
597 if (count && gl_supportslockarrays && gl_lockarrays.integer)
599 gl_state.lockrange_first = first;
600 gl_state.lockrange_count = count;
602 qglLockArraysEXT(first, count);
608 void GL_TransformToScreen(const vec4_t in, vec4_t out)
612 Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
613 Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
615 out[0] = r_refdef.x + (out[0] * iw + 1.0f) * r_refdef.width * 0.5f;
616 out[1] = r_refdef.y + (out[1] * iw + 1.0f) * r_refdef.height * 0.5f;
617 out[2] = out[2] * iw;
620 // called at beginning of frame
621 void R_Mesh_Start(void)
625 GL_Backend_ResetState();
628 int gl_backend_rebindtextures;
630 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
635 for (i = 0;i < count;i++)
636 *out++ = *in++ + offset;
639 memcpy(out, in, sizeof(*out) * count);
642 // renders triangles using vertices from the active arrays
643 int paranoidblah = 0;
644 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
646 int numelements = numtriangles * 3;
647 if (numverts == 0 || numtriangles == 0)
649 Con_Printf("R_Mesh_Draw(%d, %d, %08p);\n", numverts, numtriangles, elements);
653 c_meshelements += numelements;
655 if (r_render.integer)
657 if (gl_paranoid.integer)
661 if (!qglIsEnabled(GL_VERTEX_ARRAY))
662 Con_Printf("R_Mesh_Draw: vertex array not enabled\n");
663 for (j = 0, size = numverts * (int)sizeof(float[3]), p = gl_state.pointer_vertex;j < size;j += sizeof(int), p++)
665 if (gl_state.pointer_color)
667 if (!qglIsEnabled(GL_COLOR_ARRAY))
668 Con_Printf("R_Mesh_Draw: color array set but not enabled\n");
669 for (j = 0, size = numverts * (int)sizeof(float[4]), p = gl_state.pointer_color;j < size;j += sizeof(int), p++)
672 for (i = 0;i < backendunits;i++)
674 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)
676 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))
677 Con_Printf("R_Mesh_Draw: array enabled but no texture bound\n");
679 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
680 Con_Printf("R_Mesh_Draw: texcoord array set but not enabled\n");
681 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++)
685 for (i = 0;i < numtriangles * 3;i++)
687 if (elements[i] < 0 || elements[i] >= numverts)
689 Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range 0 - %i) in elements list\n", elements[i], numverts);
695 GL_LockArrays(0, numverts);
697 if (gl_mesh_testmanualfeeding.integer)
701 qglBegin(GL_TRIANGLES);
702 for (i = 0;i < numtriangles * 3;i++)
704 for (j = 0;j < backendunits;j++)
706 if (gl_state.units[j].pointer_texcoord)
708 if (backendunits > 1)
710 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
712 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
713 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
717 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
718 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
723 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
725 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
726 qglTexCoord3f(p[0], p[1], p[2]);
730 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
731 qglTexCoord2f(p[0], p[1]);
736 if (gl_state.pointer_color)
738 p = ((const GLfloat *)(gl_state.pointer_color)) + elements[i] * 4;
739 qglColor4f(p[0], p[1], p[2], p[3]);
741 p = ((const GLfloat *)(gl_state.pointer_vertex)) + elements[i] * 3;
742 qglVertex3f(p[0], p[1], p[2]);
747 else if (gl_mesh_testarrayelement.integer)
750 qglBegin(GL_TRIANGLES);
751 for (i = 0;i < numtriangles * 3;i++)
753 qglArrayElement(elements[i]);
758 else if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
760 qglDrawRangeElements(GL_TRIANGLES, 0, numverts, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
764 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
772 // restores backend state, used when done with 3D rendering
773 void R_Mesh_Finish(void)
781 for (i = backendunits - 1;i >= 0;i--)
783 if (qglActiveTexture)
784 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
785 if (qglClientActiveTexture)
786 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
787 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
788 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
789 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
792 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
794 if (gl_texturecubemap)
796 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
798 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
799 if (gl_combine.integer)
801 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
802 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
805 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
806 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
808 qglDisable(GL_BLEND);CHECKGLERROR
809 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
810 qglDepthMask(GL_TRUE);CHECKGLERROR
811 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
814 void R_Mesh_Matrix(const matrix4x4_t *matrix)
816 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
818 backend_modelmatrix = *matrix;
819 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
820 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
821 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
825 void R_Mesh_TextureMatrix(int unitnumber, const matrix4x4_t *matrix)
827 if (memcmp(&gl_state.units[unitnumber].matrix, matrix, sizeof(matrix4x4_t)))
829 matrix4x4_t tempmatrix;
830 gl_state.units[unitnumber].matrix = *matrix;
831 Matrix4x4_Transpose(&tempmatrix, &gl_state.units[unitnumber].matrix);
832 qglMatrixMode(GL_TEXTURE);
833 GL_ActiveTexture(unitnumber);
834 qglLoadMatrixf(&tempmatrix.m[0][0]);
835 qglMatrixMode(GL_MODELVIEW);
839 void R_Mesh_State_Texture(const rmeshstate_t *m)
841 int i, combinergb, combinealpha, scale, arrayis3d;
842 gltextureunit_t *unit;
846 if (gl_backend_rebindtextures)
848 gl_backend_rebindtextures = false;
849 GL_SetupTextureState();
852 for (i = 0, unit = gl_state.units;i < backendunits;i++, unit++)
854 if (unit->t1d != m->tex1d[i])
860 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
865 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
867 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
869 if (unit->t2d != m->tex[i])
875 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
880 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
882 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
884 if (unit->t3d != m->tex3d[i])
890 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
895 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
897 qglBindTexture(GL_TEXTURE_3D, (unit->t3d = m->tex3d[i]));CHECKGLERROR
899 if (unit->tcubemap != m->texcubemap[i])
902 if (m->texcubemap[i])
904 if (unit->tcubemap == 0)
905 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
910 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
912 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
914 combinergb = m->texcombinergb[i];
916 combinergb = GL_MODULATE;
917 if (unit->combinergb != combinergb)
920 unit->combinergb = combinergb;
921 if (gl_combine.integer)
923 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
927 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
930 combinealpha = m->texcombinealpha[i];
932 combinealpha = GL_MODULATE;
933 if (unit->combinealpha != combinealpha)
936 unit->combinealpha = combinealpha;
937 if (gl_combine.integer)
939 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
942 scale = max(m->texrgbscale[i], 1);
943 if (unit->rgbscale != scale)
946 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = scale));CHECKGLERROR
948 scale = max(m->texalphascale[i], 1);
949 if (unit->alphascale != scale)
952 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = scale));CHECKGLERROR
954 arrayis3d = unit->t3d || unit->tcubemap;
955 if (unit->pointer_texcoord != m->pointer_texcoord[i] || unit->arrayis3d != arrayis3d)
957 GL_ClientActiveTexture(i);
958 if (m->pointer_texcoord[i])
960 if (!unit->arrayenabled)
962 unit->arrayenabled = true;
963 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
968 if (unit->arrayenabled)
970 unit->arrayenabled = false;
971 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
974 unit->pointer_texcoord = m->pointer_texcoord[i];
975 unit->arrayis3d = arrayis3d;
977 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[3]), unit->pointer_texcoord);
979 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), unit->pointer_texcoord);
986 ==============================================================================
990 ==============================================================================
993 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height, qboolean jpeg)
998 if (!r_render.integer)
1001 buffer = Mem_Alloc(tempmempool, width*height*3);
1002 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
1006 ret = JPEG_SaveImage_preflipped (filename, width, height, buffer);
1008 ret = Image_WriteTGARGB_preflipped (filename, width, height, buffer);
1014 //=============================================================================
1016 void R_ClearScreen(void)
1018 if (r_render.integer)
1021 qglClearColor(0,0,0,0);CHECKGLERROR
1022 qglClearDepth(1);CHECKGLERROR
1025 // LordHavoc: we use a stencil centered around 128 instead of 0,
1026 // to avoid clamping interfering with strange shadow volume
1028 qglClearStencil(128);CHECKGLERROR
1031 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));CHECKGLERROR
1032 // set dithering mode
1033 if (gl_dither.integer)
1035 qglEnable(GL_DITHER);CHECKGLERROR
1039 qglDisable(GL_DITHER);CHECKGLERROR
1048 This is called every frame, and can also be called explicitly to flush
1052 void SCR_UpdateScreen (void)
1054 if (gl_delayfinish.integer)
1058 R_TimeReport("finish");
1061 if (r_textureunits.integer > gl_textureunits)
1062 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
1063 if (r_textureunits.integer < 1)
1064 Cvar_SetValueQuick(&r_textureunits, 1);
1066 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
1067 Cvar_SetValueQuick(&gl_combine, 0);
1070 r_lightmapscalebit = 0;
1071 if (gl_combine.integer && r_textureunits.integer > 1)
1072 r_lightmapscalebit += 2;
1074 R_TimeReport("setup");
1078 R_TimeReport("clear");
1080 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
1086 if (gl_delayfinish.integer)
1088 // tell driver to commit it's partially full geometry queue to the rendering queue
1089 // (this doesn't wait for the commands themselves to complete)
1096 R_TimeReport("finish");
1101 //===========================================================================
1102 // dynamic vertex array buffer subsystem
1103 //===========================================================================
1105 float varray_vertex3f[65536*3];
1106 float varray_color4f[65536*4];
1107 float varray_texcoord2f[4][65536*2];
1108 float varray_texcoord3f[4][65536*3];
1109 float varray_normal3f[65536*3];
1110 int earray_element3i[65536];
1112 //===========================================================================
1113 // vertex array caching subsystem
1114 //===========================================================================
1116 typedef struct rcachearraylink_s
1118 struct rcachearraylink_s *next, *prev;
1119 struct rcachearrayitem_s *data;
1123 typedef struct rcachearrayitem_s
1125 // the original request structure
1126 rcachearrayrequest_t request;
1129 // offset into r_mesh_rcachedata
1131 // for linking this into the sequential list
1132 rcachearraylink_t sequentiallink;
1133 // for linking this into the lookup list
1134 rcachearraylink_t hashlink;
1138 #define RCACHEARRAY_HASHSIZE 65536
1139 #define RCACHEARRAY_ITEMS 4096
1140 #define RCACHEARRAY_DEFAULTSIZE (4 << 20)
1142 // all active items are linked into this chain in sorted order
1143 static rcachearraylink_t r_mesh_rcachesequentialchain;
1144 // all inactive items are linked into this chain in unknown order
1145 static rcachearraylink_t r_mesh_rcachefreechain;
1146 // all active items are also linked into these chains (using their hashlink)
1147 static rcachearraylink_t r_mesh_rcachechain[RCACHEARRAY_HASHSIZE];
1149 // all items are stored here, whether active or inactive
1150 static rcachearrayitem_t r_mesh_rcacheitems[RCACHEARRAY_ITEMS];
1152 // size of data buffer
1153 static int r_mesh_rcachedata_size = RCACHEARRAY_DEFAULTSIZE;
1155 static qbyte r_mesh_rcachedata[RCACHEARRAY_DEFAULTSIZE];
1158 static int r_mesh_rcachedata_offset;
1159 static rcachearraylink_t *r_mesh_rcachesequentialchain_current;
1161 static void R_Mesh_CacheArray_Startup(void)
1164 rcachearraylink_t *l;
1165 // prepare all the linked lists
1166 l = &r_mesh_rcachesequentialchain;l->next = l->prev = l;l->data = NULL;
1167 l = &r_mesh_rcachefreechain;l->next = l->prev = l;l->data = NULL;
1168 memset(&r_mesh_rcachechain, 0, sizeof(r_mesh_rcachechain));
1169 for (i = 0;i < RCACHEARRAY_HASHSIZE;i++)
1171 l = &r_mesh_rcachechain[i];
1172 l->next = l->prev = l;
1175 memset(&r_mesh_rcacheitems, 0, sizeof(r_mesh_rcacheitems));
1176 for (i = 0;i < RCACHEARRAY_ITEMS;i++)
1178 r_mesh_rcacheitems[i].hashlink.data = r_mesh_rcacheitems[i].sequentiallink.data = &r_mesh_rcacheitems[i];
1179 l = &r_mesh_rcacheitems[i].sequentiallink;
1180 l->next = &r_mesh_rcachefreechain;
1181 l->prev = l->next->prev;
1182 l->next->prev = l->prev->next = l;
1184 // clear other state
1185 r_mesh_rcachedata_offset = 0;
1186 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1189 static void R_Mesh_CacheArray_Shutdown(void)
1194 static void R_Mesh_CacheArray_ValidateState(int num)
1196 rcachearraylink_t *l, *lhead;
1197 lhead = &r_mesh_rcachesequentialchain;
1198 if (r_mesh_rcachesequentialchain_current == lhead)
1200 for (l = lhead->next;l != lhead;l = l->next)
1201 if (r_mesh_rcachesequentialchain_current == l)
1203 Sys_Error("%i", num);
1207 int R_Mesh_CacheArray(rcachearrayrequest_t *r)
1209 rcachearraylink_t *l, *lhead, *lnext;
1210 rcachearrayitem_t *d;
1211 int hashindex, offset, offsetend;
1213 //R_Mesh_CacheArray_ValidateState(3);
1214 // calculate a hashindex to choose a cache chain
1216 hashindex = CRC_Block((void *)r, sizeof(*r)) % RCACHEARRAY_HASHSIZE;
1218 // is it already cached?
1219 for (lhead = &r_mesh_rcachechain[hashindex], l = lhead->next;l != lhead;l = l->next)
1221 if (!memcmp(&l->data->request, r, sizeof(l->data->request)))
1223 // we have it cached already
1224 r->data = r_mesh_rcachedata + l->data->offset;
1229 // we need to add a new cache item, this means finding a place for the new
1230 // data and making sure we have a free item available, lots of work...
1232 // check if buffer needs to wrap
1233 if (r_mesh_rcachedata_offset + r->data_size > r_mesh_rcachedata_size)
1236 if (r->data_size * 10 > r_mesh_rcachedata_size)
1238 // realloc whole cache
1241 // reset back to start
1242 r_mesh_rcachedata_offset = 0;
1243 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1245 offset = r_mesh_rcachedata_offset;
1246 r_mesh_rcachedata_offset += r->data_size;
1247 offsetend = r_mesh_rcachedata_offset;
1248 //R_Mesh_CacheArray_ValidateState(4);
1253 for (lhead = &r_mesh_rcachesequentialchain, l = lhead->next, n = 0;l != lhead;l = l->next, n++);
1254 Con_Printf("R_Mesh_CacheArray: new data range %i:%i, %i items are already linked\n", offset, offsetend, n);
1258 // make room for the new data (remove old items)
1259 lhead = &r_mesh_rcachesequentialchain;
1260 l = r_mesh_rcachesequentialchain_current;
1263 while (l != lhead && l->data->offset < offsetend && l->data->offset + l->data->request.data_size > offset)
1265 //r_mesh_rcachesequentialchain_current = l;
1266 //R_Mesh_CacheArray_ValidateState(8);
1268 // if at the end of the chain, wrap around
1270 lnext = lnext->next;
1271 //r_mesh_rcachesequentialchain_current = lnext;
1272 //R_Mesh_CacheArray_ValidateState(10);
1274 // unlink from sequential chain
1275 l->next->prev = l->prev;
1276 l->prev->next = l->next;
1277 //R_Mesh_CacheArray_ValidateState(11);
1278 // link into free chain
1279 l->next = &r_mesh_rcachefreechain;
1280 l->prev = l->next->prev;
1281 l->next->prev = l->prev->next = l;
1282 //R_Mesh_CacheArray_ValidateState(12);
1284 l = &l->data->hashlink;
1285 // unlink from hash chain
1286 l->next->prev = l->prev;
1287 l->prev->next = l->next;
1290 //r_mesh_rcachesequentialchain_current = l;
1291 //R_Mesh_CacheArray_ValidateState(9);
1293 //r_mesh_rcachesequentialchain_current = l;
1294 //R_Mesh_CacheArray_ValidateState(5);
1295 // gobble an extra item if we have no free items available
1296 if (r_mesh_rcachefreechain.next == &r_mesh_rcachefreechain)
1300 // unlink from sequential chain
1301 l->next->prev = l->prev;
1302 l->prev->next = l->next;
1303 // link into free chain
1304 l->next = &r_mesh_rcachefreechain;
1305 l->prev = l->next->prev;
1306 l->next->prev = l->prev->next = l;
1308 l = &l->data->hashlink;
1309 // unlink from hash chain
1310 l->next->prev = l->prev;
1311 l->prev->next = l->next;
1315 r_mesh_rcachesequentialchain_current = l;
1316 //R_Mesh_CacheArray_ValidateState(6);
1318 // now take an item from the free chain
1319 l = r_mesh_rcachefreechain.next;
1325 l->next->prev = l->prev;
1326 l->prev->next = l->next;
1327 // relink to sequential
1328 l->next = r_mesh_rcachesequentialchain_current->prev;
1329 l->prev = l->next->prev;
1330 while (l->next->data && l->data && l->next->data->offset <= d->offset)
1332 //Con_Printf(">\n");
1333 l->next = l->next->next;
1334 l->prev = l->prev->next;
1336 while (l->prev->data && l->data && l->prev->data->offset >= d->offset)
1338 //Con_Printf("<\n");
1339 l->prev = l->prev->prev;
1340 l->next = l->next->prev;
1342 l->next->prev = l->prev->next = l;
1343 // also link into hash chain
1344 l = &l->data->hashlink;
1345 l->next = &r_mesh_rcachechain[hashindex];
1346 l->prev = l->next->prev;
1348 l->next->prev = l->prev->next = l;
1351 //r_mesh_rcachesequentialchain_current = d->sequentiallink.next;
1353 //R_Mesh_CacheArray_ValidateState(7);
1354 // and finally set the data pointer
1355 r->data = r_mesh_rcachedata + d->offset;
1356 // and tell the caller to fill the array