5 #include "cl_collision.h"
7 cvar_t gl_mesh_drawrangeelements = {0, "gl_mesh_drawrangeelements", "1"};
8 cvar_t gl_mesh_testarrayelement = {0, "gl_mesh_testarrayelement", "0"};
9 cvar_t gl_mesh_testmanualfeeding = {0, "gl_mesh_testmanualfeeding", "0"};
10 cvar_t gl_delayfinish = {CVAR_SAVE, "gl_delayfinish", "0"};
11 cvar_t gl_paranoid = {0, "gl_paranoid", "0"};
12 cvar_t gl_printcheckerror = {0, "gl_printcheckerror", "0"};
14 cvar_t r_render = {0, "r_render", "1"};
15 cvar_t r_waterwarp = {CVAR_SAVE, "r_waterwarp", "1"};
16 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1"}; // whether or not to use dithering
17 cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
19 int gl_maxdrawrangeelementsvertices;
20 int gl_maxdrawrangeelementsindices;
25 void GL_PrintError(int errornumber, char *filename, int linenumber)
29 #ifdef GL_INVALID_ENUM
31 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
34 #ifdef GL_INVALID_VALUE
35 case GL_INVALID_VALUE:
36 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
39 #ifdef GL_INVALID_OPERATION
40 case GL_INVALID_OPERATION:
41 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
44 #ifdef GL_STACK_OVERFLOW
45 case GL_STACK_OVERFLOW:
46 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
49 #ifdef GL_STACK_UNDERFLOW
50 case GL_STACK_UNDERFLOW:
51 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
54 #ifdef GL_OUT_OF_MEMORY
55 case GL_OUT_OF_MEMORY:
56 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
59 #ifdef GL_TABLE_TOO_LARGE
60 case GL_TABLE_TOO_LARGE:
61 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
65 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
71 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active\n");
73 int c_meshs, c_meshelements;
75 void SCR_ScreenShot_f (void);
77 static matrix4x4_t backend_viewmatrix;
78 static matrix4x4_t backend_modelmatrix;
79 static matrix4x4_t backend_modelviewmatrix;
80 static matrix4x4_t backend_glmodelviewmatrix;
81 static matrix4x4_t backend_projectmatrix;
83 static int backendunits, backendactive;
84 static mempool_t *gl_backend_mempool;
87 note: here's strip order for a terrain row:
94 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
96 *elements++ = i + row;
98 *elements++ = i + row + 1;
101 *elements++ = i + row + 1;
104 for (y = 0;y < rows - 1;y++)
106 for (x = 0;x < columns - 1;x++)
109 *elements++ = i + columns;
111 *elements++ = i + columns + 1;
114 *elements++ = i + columns + 1;
125 for (y = 0;y < rows - 1;y++)
127 for (x = 0;x < columns - 1;x++)
131 *elements++ = i + columns;
132 *elements++ = i + columns + 1;
133 *elements++ = i + columns;
134 *elements++ = i + columns + 1;
140 int polygonelements[768];
142 static void R_Mesh_CacheArray_Startup(void);
143 static void R_Mesh_CacheArray_Shutdown(void);
144 void GL_Backend_AllocArrays(void)
146 if (!gl_backend_mempool)
147 gl_backend_mempool = Mem_AllocPool("GL_Backend");
148 R_Mesh_CacheArray_Startup();
151 void GL_Backend_FreeArrays(void)
153 R_Mesh_CacheArray_Shutdown();
154 Mem_FreePool(&gl_backend_mempool);
157 static void gl_backend_start(void)
159 Con_DPrint("OpenGL Backend started\n");
160 if (qglDrawRangeElements != NULL)
163 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
165 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
167 Con_DPrintf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
170 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
172 GL_Backend_AllocArrays();
174 backendactive = true;
177 static void gl_backend_shutdown(void)
180 backendactive = false;
182 Con_DPrint("OpenGL Backend shutting down\n");
184 GL_Backend_FreeArrays();
187 static void gl_backend_newmap(void)
191 cvar_t scr_zoomwindow = {CVAR_SAVE, "scr_zoomwindow", "0"};
192 cvar_t scr_zoomwindow_viewsizex = {CVAR_SAVE, "scr_zoomwindow_viewsizex", "20"};
193 cvar_t scr_zoomwindow_viewsizey = {CVAR_SAVE, "scr_zoomwindow_viewsizey", "20"};
194 cvar_t scr_zoomwindow_fov = {CVAR_SAVE, "scr_zoomwindow_fov", "20"};
196 void gl_backend_init(void)
200 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
202 polygonelements[i * 3 + 0] = 0;
203 polygonelements[i * 3 + 1] = i + 1;
204 polygonelements[i * 3 + 2] = i + 2;
207 Cvar_RegisterVariable(&r_render);
208 Cvar_RegisterVariable(&r_waterwarp);
209 Cvar_RegisterVariable(&gl_dither);
210 Cvar_RegisterVariable(&gl_lockarrays);
211 Cvar_RegisterVariable(&gl_delayfinish);
212 Cvar_RegisterVariable(&gl_paranoid);
213 Cvar_RegisterVariable(&gl_printcheckerror);
215 Cvar_SetValue("r_render", 0);
218 Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
219 Cvar_RegisterVariable(&gl_mesh_testarrayelement);
220 Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
222 Cvar_RegisterVariable(&scr_zoomwindow);
223 Cvar_RegisterVariable(&scr_zoomwindow_viewsizex);
224 Cvar_RegisterVariable(&scr_zoomwindow_viewsizey);
225 Cvar_RegisterVariable(&scr_zoomwindow_fov);
227 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
230 void GL_SetupView_Orientation_Identity (void)
232 Matrix4x4_CreateIdentity(&backend_viewmatrix);
233 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
236 void GL_SetupView_Orientation_FromEntity(matrix4x4_t *matrix)
238 matrix4x4_t tempmatrix, basematrix;
239 Matrix4x4_Invert_Simple(&tempmatrix, matrix);
240 Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
241 Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
242 Matrix4x4_Concat(&backend_viewmatrix, &basematrix, &tempmatrix);
243 //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
244 //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
245 //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
246 //Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
247 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
250 void GL_SetupView_Mode_Perspective (double fovx, double fovy, double zNear, double zFar)
255 if (!r_render.integer)
259 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
260 qglLoadIdentity();CHECKGLERROR
262 xmax = zNear * tan(fovx * M_PI / 360.0);
263 ymax = zNear * tan(fovy * M_PI / 360.0);
265 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
266 qglGetDoublev(GL_PROJECTION_MATRIX, m);
267 backend_projectmatrix.m[0][0] = m[0];
268 backend_projectmatrix.m[1][0] = m[1];
269 backend_projectmatrix.m[2][0] = m[2];
270 backend_projectmatrix.m[3][0] = m[3];
271 backend_projectmatrix.m[0][1] = m[4];
272 backend_projectmatrix.m[1][1] = m[5];
273 backend_projectmatrix.m[2][1] = m[6];
274 backend_projectmatrix.m[3][1] = m[7];
275 backend_projectmatrix.m[0][2] = m[8];
276 backend_projectmatrix.m[1][2] = m[9];
277 backend_projectmatrix.m[2][2] = m[10];
278 backend_projectmatrix.m[3][2] = m[11];
279 backend_projectmatrix.m[0][3] = m[12];
280 backend_projectmatrix.m[1][3] = m[13];
281 backend_projectmatrix.m[2][3] = m[14];
282 backend_projectmatrix.m[3][3] = m[15];
283 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
284 GL_SetupView_Orientation_Identity();
287 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
291 if (!r_render.integer)
295 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
296 qglLoadIdentity();CHECKGLERROR
298 nudge = 1.0 - 1.0 / (1<<23);
299 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
304 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
313 m[14] = -2 * zNear * nudge;
316 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
317 GL_SetupView_Orientation_Identity();
318 backend_projectmatrix.m[0][0] = m[0];
319 backend_projectmatrix.m[1][0] = m[1];
320 backend_projectmatrix.m[2][0] = m[2];
321 backend_projectmatrix.m[3][0] = m[3];
322 backend_projectmatrix.m[0][1] = m[4];
323 backend_projectmatrix.m[1][1] = m[5];
324 backend_projectmatrix.m[2][1] = m[6];
325 backend_projectmatrix.m[3][1] = m[7];
326 backend_projectmatrix.m[0][2] = m[8];
327 backend_projectmatrix.m[1][2] = m[9];
328 backend_projectmatrix.m[2][2] = m[10];
329 backend_projectmatrix.m[3][2] = m[11];
330 backend_projectmatrix.m[0][3] = m[12];
331 backend_projectmatrix.m[1][3] = m[13];
332 backend_projectmatrix.m[2][3] = m[14];
333 backend_projectmatrix.m[3][3] = m[15];
336 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
340 if (!r_render.integer)
344 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
345 qglLoadIdentity();CHECKGLERROR
346 qglOrtho(x1, x2, y2, y1, zNear, zFar);
347 qglGetDoublev(GL_PROJECTION_MATRIX, m);
348 backend_projectmatrix.m[0][0] = m[0];
349 backend_projectmatrix.m[1][0] = m[1];
350 backend_projectmatrix.m[2][0] = m[2];
351 backend_projectmatrix.m[3][0] = m[3];
352 backend_projectmatrix.m[0][1] = m[4];
353 backend_projectmatrix.m[1][1] = m[5];
354 backend_projectmatrix.m[2][1] = m[6];
355 backend_projectmatrix.m[3][1] = m[7];
356 backend_projectmatrix.m[0][2] = m[8];
357 backend_projectmatrix.m[1][2] = m[9];
358 backend_projectmatrix.m[2][2] = m[10];
359 backend_projectmatrix.m[3][2] = m[11];
360 backend_projectmatrix.m[0][3] = m[12];
361 backend_projectmatrix.m[1][3] = m[13];
362 backend_projectmatrix.m[2][3] = m[14];
363 backend_projectmatrix.m[3][3] = m[15];
364 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
365 GL_SetupView_Orientation_Identity();
368 typedef struct gltextureunit_s
370 int t1d, t2d, t3d, tcubemap;
373 const void *pointer_texcoord;
374 float rgbscale, alphascale;
375 int combinergb, combinealpha;
376 // FIXME: add more combine stuff
377 // texmatrixenabled exists only to avoid unnecessary texmatrix compares
378 int texmatrixenabled;
389 int colormask; // stored as bottom 4 bits: r g b a (3 2 1 0 order)
394 gltextureunit_t units[MAX_TEXTUREUNITS];
398 const void *pointer_vertex;
399 const void *pointer_color;
403 void GL_SetupTextureState(void)
406 gltextureunit_t *unit;
409 gl_state.clientunit = -1;
410 for (i = 0;i < backendunits;i++)
413 GL_ClientActiveTexture(i);
414 unit = gl_state.units + i;
419 unit->arrayenabled = false;
420 unit->arrayis3d = false;
421 unit->pointer_texcoord = NULL;
423 unit->alphascale = 1;
424 unit->combinergb = GL_MODULATE;
425 unit->combinealpha = GL_MODULATE;
426 unit->texmatrixenabled = false;
427 unit->matrix = r_identitymatrix;
428 qglMatrixMode(GL_TEXTURE);
430 qglMatrixMode(GL_MODELVIEW);
432 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
433 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
435 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
436 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
439 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
441 if (gl_texturecubemap)
443 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
445 if (gl_combine.integer)
447 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
448 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
449 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
450 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
451 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
452 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
453 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
454 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
455 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
456 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
457 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
458 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
459 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
460 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
461 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
462 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
463 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
467 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
473 void GL_Backend_ResetState(void)
475 memset(&gl_state, 0, sizeof(gl_state));
476 gl_state.depthtest = true;
477 gl_state.blendfunc1 = GL_ONE;
478 gl_state.blendfunc2 = GL_ZERO;
479 gl_state.blend = false;
480 gl_state.depthmask = GL_TRUE;
481 gl_state.colormask = 15;
482 gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
483 gl_state.lockrange_first = 0;
484 gl_state.lockrange_count = 0;
485 gl_state.pointer_vertex = NULL;
486 gl_state.pointer_color = NULL;
490 qglColorMask(1, 1, 1, 1);
491 qglEnable(GL_CULL_FACE);CHECKGLERROR
492 qglCullFace(GL_FRONT);CHECKGLERROR
493 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
494 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
495 qglDisable(GL_BLEND);CHECKGLERROR
496 qglDepthMask(gl_state.depthmask);CHECKGLERROR
498 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
499 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
501 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
502 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
504 GL_Color(0, 0, 0, 0);
505 GL_Color(1, 1, 1, 1);
507 GL_SetupTextureState();
510 void GL_ActiveTexture(int num)
512 if (gl_state.unit != num)
515 if (qglActiveTexture)
517 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
523 void GL_ClientActiveTexture(int num)
525 if (gl_state.clientunit != num)
527 gl_state.clientunit = num;
528 if (qglActiveTexture)
530 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
536 void GL_BlendFunc(int blendfunc1, int blendfunc2)
538 if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
542 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
543 if (gl_state.blendfunc2 == GL_ZERO)
545 if (gl_state.blendfunc1 == GL_ONE)
550 qglDisable(GL_BLEND);CHECKGLERROR
558 qglEnable(GL_BLEND);CHECKGLERROR
567 qglEnable(GL_BLEND);CHECKGLERROR
573 void GL_DepthMask(int state)
575 if (gl_state.depthmask != state)
579 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
583 void GL_DepthTest(int state)
585 if (gl_state.depthtest != state)
589 gl_state.depthtest = state;
590 if (gl_state.depthtest)
592 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
596 qglDisable(GL_DEPTH_TEST);CHECKGLERROR
601 void GL_ColorMask(int r, int g, int b, int a)
603 int state = r*8 + g*4 + b*2 + a*1;
604 if (gl_state.colormask != state)
608 gl_state.colormask = state;
609 qglColorMask((GLboolean)r, (GLboolean)g, (GLboolean)b, (GLboolean)a);CHECKGLERROR
613 void GL_Color(float cr, float cg, float cb, float ca)
615 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)
619 gl_state.color4f[0] = cr;
620 gl_state.color4f[1] = cg;
621 gl_state.color4f[2] = cb;
622 gl_state.color4f[3] = ca;
624 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
629 void GL_ShowTrisColor(float cr, float cg, float cb, float ca)
633 r_showtrispass = false;
634 GL_Color(cr * r_showtris.value, cg * r_showtris.value, cb * r_showtris.value, ca);
635 r_showtrispass = true;
639 void GL_LockArrays(int first, int count)
641 if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
643 if (gl_state.lockrange_count)
645 gl_state.lockrange_count = 0;
647 qglUnlockArraysEXT();
650 if (count && gl_supportslockarrays && gl_lockarrays.integer && r_render.integer)
652 gl_state.lockrange_first = first;
653 gl_state.lockrange_count = count;
655 qglLockArraysEXT(first, count);
661 void GL_Scissor (int x, int y, int width, int height)
664 qglScissor(x, vid.realheight - (y + height),width,height);
668 void GL_ScissorTest(int state)
670 if(gl_state.scissortest == state)
674 if((gl_state.scissortest = state))
675 qglEnable(GL_SCISSOR_TEST);
677 qglDisable(GL_SCISSOR_TEST);
681 void GL_Clear(int mask)
685 qglClear(mask);CHECKGLERROR
688 void GL_TransformToScreen(const vec4_t in, vec4_t out)
692 Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
693 Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
695 out[0] = r_view_x + (out[0] * iw + 1.0f) * r_view_width * 0.5f;
696 out[1] = r_view_y + (out[1] * iw + 1.0f) * r_view_height * 0.5f;
697 out[2] = out[2] * iw;
700 // called at beginning of frame
701 void R_Mesh_Start(void)
705 GL_Backend_ResetState();
708 int gl_backend_rebindtextures;
710 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
715 for (i = 0;i < count;i++)
716 *out++ = *in++ + offset;
719 memcpy(out, in, sizeof(*out) * count);
722 // renders triangles using vertices from the active arrays
723 int paranoidblah = 0;
724 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
726 int numelements = numtriangles * 3;
727 if (numverts == 0 || numtriangles == 0)
729 Con_Printf("R_Mesh_Draw(%d, %d, %08p);\n", numverts, numtriangles, elements);
735 R_Mesh_Draw_ShowTris(numverts, numtriangles, elements);
739 c_meshelements += numelements;
740 if (gl_paranoid.integer)
744 if (!qglIsEnabled(GL_VERTEX_ARRAY))
745 Con_Print("R_Mesh_Draw: vertex array not enabled\n");
746 for (j = 0, size = numverts * (int)sizeof(float[3]), p = gl_state.pointer_vertex;j < size;j += sizeof(int), p++)
748 if (gl_state.pointer_color)
750 if (!qglIsEnabled(GL_COLOR_ARRAY))
751 Con_Print("R_Mesh_Draw: color array set but not enabled\n");
752 for (j = 0, size = numverts * (int)sizeof(float[4]), p = gl_state.pointer_color;j < size;j += sizeof(int), p++)
755 for (i = 0;i < backendunits;i++)
757 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)
759 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))
760 Con_Print("R_Mesh_Draw: array enabled but no texture bound\n");
761 GL_ClientActiveTexture(i);
762 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
763 Con_Print("R_Mesh_Draw: texcoord array set but not enabled\n");
764 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++)
768 for (i = 0;i < numtriangles * 3;i++)
770 if (elements[i] < 0 || elements[i] >= numverts)
772 Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range 0 - %i) in elements list\n", elements[i], numverts);
778 if (r_render.integer)
781 if (gl_mesh_testmanualfeeding.integer)
785 qglBegin(GL_TRIANGLES);
786 for (i = 0;i < numtriangles * 3;i++)
788 for (j = 0;j < backendunits;j++)
790 if (gl_state.units[j].pointer_texcoord)
792 if (backendunits > 1)
794 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
796 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
797 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
801 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
802 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
807 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
809 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
810 qglTexCoord3f(p[0], p[1], p[2]);
814 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
815 qglTexCoord2f(p[0], p[1]);
820 if (gl_state.pointer_color)
822 p = ((const GLfloat *)(gl_state.pointer_color)) + elements[i] * 4;
823 qglColor4f(p[0], p[1], p[2], p[3]);
825 p = ((const GLfloat *)(gl_state.pointer_vertex)) + elements[i] * 3;
826 qglVertex3f(p[0], p[1], p[2]);
831 else if (gl_mesh_testarrayelement.integer)
834 qglBegin(GL_TRIANGLES);
835 for (i = 0;i < numtriangles * 3;i++)
837 qglArrayElement(elements[i]);
842 else if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
844 qglDrawRangeElements(GL_TRIANGLES, 0, numverts, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
848 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
854 // restores backend state, used when done with 3D rendering
855 void R_Mesh_Finish(void)
863 for (i = backendunits - 1;i >= 0;i--)
865 if (qglActiveTexture)
866 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
867 if (qglClientActiveTexture)
868 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
869 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
870 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
871 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
874 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
876 if (gl_texturecubemap)
878 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
880 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
881 if (gl_combine.integer)
883 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
884 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
887 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
888 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
890 qglDisable(GL_BLEND);CHECKGLERROR
891 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
892 qglDepthMask(GL_TRUE);CHECKGLERROR
893 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
896 void R_Mesh_Matrix(const matrix4x4_t *matrix)
898 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
900 backend_modelmatrix = *matrix;
901 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
902 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
903 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
907 void R_Mesh_State(const rmeshstate_t *m)
909 int i, combinergb, combinealpha, scale;
910 gltextureunit_t *unit;
911 matrix4x4_t tempmatrix;
915 if (gl_state.pointer_vertex != m->pointer_vertex)
917 gl_state.pointer_vertex = m->pointer_vertex;
919 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), gl_state.pointer_vertex);
926 if (gl_state.pointer_color != m->pointer_color)
929 if (!gl_state.pointer_color)
931 qglEnableClientState(GL_COLOR_ARRAY);
934 else if (!m->pointer_color)
936 qglDisableClientState(GL_COLOR_ARRAY);
938 // when color array is on the glColor gets trashed, set it again
939 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
942 gl_state.pointer_color = m->pointer_color;
943 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), gl_state.pointer_color);
947 if (gl_backend_rebindtextures)
949 gl_backend_rebindtextures = false;
950 GL_SetupTextureState();
953 for (i = 0, unit = gl_state.units;i < backendunits;i++, unit++)
955 // update 1d texture binding
956 if (unit->t1d != m->tex1d[i])
963 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
965 unit->t1d = m->tex1d[i];
967 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
975 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
979 // update 2d texture binding
980 if (unit->t2d != m->tex[i])
987 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
989 unit->t2d = m->tex[i];
991 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
999 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1003 // update 3d texture binding
1004 if (unit->t3d != m->tex3d[i])
1010 GL_ActiveTexture(i);
1011 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1013 unit->t3d = m->tex3d[i];
1014 GL_ActiveTexture(i);
1015 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1022 GL_ActiveTexture(i);
1023 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1027 // update cubemap texture binding
1028 if (unit->tcubemap != m->texcubemap[i])
1030 if (m->texcubemap[i])
1032 if (unit->tcubemap == 0)
1034 GL_ActiveTexture(i);
1035 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1037 unit->tcubemap = m->texcubemap[i];
1038 GL_ActiveTexture(i);
1039 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1046 GL_ActiveTexture(i);
1047 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1051 // update texture unit settings if the unit is enabled
1052 if (unit->t1d || unit->t2d || unit->t3d || unit->tcubemap)
1054 // texture unit is enabled, enable the array
1055 if (!unit->arrayenabled)
1057 unit->arrayenabled = true;
1058 GL_ClientActiveTexture(i);
1059 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1061 // update combine settings
1062 if (gl_combine.integer)
1064 // GL_ARB_texture_env_combine
1065 combinergb = m->texcombinergb[i] ? m->texcombinergb[i] : GL_MODULATE;
1066 if (unit->combinergb != combinergb)
1068 unit->combinergb = combinergb;
1069 GL_ActiveTexture(i);
1070 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
1072 combinealpha = m->texcombinealpha[i] ? m->texcombinealpha[i] : GL_MODULATE;
1073 if (unit->combinealpha != combinealpha)
1075 unit->combinealpha = combinealpha;
1076 GL_ActiveTexture(i);
1077 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
1079 scale = max(m->texrgbscale[i], 1);
1080 if (unit->rgbscale != scale)
1082 GL_ActiveTexture(i);
1083 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = scale));CHECKGLERROR
1085 scale = max(m->texalphascale[i], 1);
1086 if (unit->alphascale != scale)
1088 GL_ActiveTexture(i);
1089 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = scale));CHECKGLERROR
1095 combinergb = m->texcombinergb[i] ? m->texcombinergb[i] : GL_MODULATE;
1096 if (unit->combinergb != combinergb)
1098 unit->combinergb = combinergb;
1099 GL_ActiveTexture(i);
1100 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
1103 // update array settings
1104 if (m->pointer_texcoord3f[i])
1106 // 3d texcoord array
1107 if (unit->pointer_texcoord != m->pointer_texcoord3f[i] || !unit->arrayis3d)
1109 unit->pointer_texcoord = m->pointer_texcoord3f[i];
1110 unit->arrayis3d = true;
1111 GL_ClientActiveTexture(i);
1112 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[3]), unit->pointer_texcoord);
1118 // 2d texcoord array
1119 if (unit->pointer_texcoord != m->pointer_texcoord[i] || unit->arrayis3d)
1121 unit->pointer_texcoord = m->pointer_texcoord[i];
1122 unit->arrayis3d = false;
1123 GL_ClientActiveTexture(i);
1124 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), unit->pointer_texcoord);
1129 if (m->texmatrix[i].m[3][3])
1131 // texmatrix specified, check if it is different
1132 if (!unit->texmatrixenabled || memcmp(&unit->matrix, &m->texmatrix[i], sizeof(matrix4x4_t)))
1134 unit->texmatrixenabled = true;
1135 unit->matrix = m->texmatrix[i];
1136 Matrix4x4_Transpose(&tempmatrix, &unit->matrix);
1137 qglMatrixMode(GL_TEXTURE);
1138 GL_ActiveTexture(i);
1139 qglLoadMatrixf(&tempmatrix.m[0][0]);
1140 qglMatrixMode(GL_MODELVIEW);
1145 // no texmatrix specified, revert to identity
1146 if (unit->texmatrixenabled)
1148 unit->texmatrixenabled = false;
1149 qglMatrixMode(GL_TEXTURE);
1150 GL_ActiveTexture(i);
1152 qglMatrixMode(GL_MODELVIEW);
1158 // texture unit is disabled, disable the array
1159 if (unit->arrayenabled)
1161 unit->arrayenabled = false;
1162 GL_ClientActiveTexture(i);
1163 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1165 // no need to update most settings on a disabled texture unit
1170 void R_Mesh_Draw_ShowTris(int numverts, int numtriangles, const int *elements)
1173 for (;numtriangles;numtriangles--, elements += 3)
1175 qglArrayElement(elements[0]);qglArrayElement(elements[1]);
1176 qglArrayElement(elements[1]);qglArrayElement(elements[2]);
1177 qglArrayElement(elements[2]);qglArrayElement(elements[0]);
1184 ==============================================================================
1188 ==============================================================================
1191 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height, qboolean jpeg)
1196 if (!r_render.integer)
1199 buffer = Mem_Alloc(tempmempool, width*height*3);
1200 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
1204 ret = JPEG_SaveImage_preflipped (filename, width, height, buffer);
1206 ret = Image_WriteTGARGB_preflipped (filename, width, height, buffer);
1212 //=============================================================================
1214 void R_ClearScreen(void)
1216 if (r_render.integer)
1219 qglClearColor(0,0,0,0);CHECKGLERROR
1220 qglClearDepth(1);CHECKGLERROR
1223 // LordHavoc: we use a stencil centered around 128 instead of 0,
1224 // to avoid clamping interfering with strange shadow volume
1226 qglClearStencil(128);CHECKGLERROR
1229 GL_Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));
1230 // set dithering mode
1231 if (gl_dither.integer)
1233 qglEnable(GL_DITHER);CHECKGLERROR
1237 qglDisable(GL_DITHER);CHECKGLERROR
1243 ====================
1245 ====================
1247 float CalcFov (float fov_x, float width, float height)
1249 // calculate vision size and alter by aspect, then convert back to angle
1250 return atan (height / (width / tan(fov_x/360*M_PI))) * 360 / M_PI;
1257 This is called every frame, and can also be called explicitly to flush
1261 void SCR_UpdateScreen (void)
1263 if (gl_delayfinish.integer)
1266 R_TimeReport("meshfinish");
1268 R_TimeReport("finish");
1273 if (r_textureunits.integer > gl_textureunits)
1274 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
1275 if (r_textureunits.integer < 1)
1276 Cvar_SetValueQuick(&r_textureunits, 1);
1278 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
1279 Cvar_SetValueQuick(&gl_combine, 0);
1282 R_TimeReport("setup");
1286 R_TimeReport("clear");
1288 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
1294 if (scr_viewsize.value < 30)
1295 Cvar_Set ("viewsize","30");
1296 if (scr_viewsize.value > 120)
1297 Cvar_Set ("viewsize","120");
1299 // bound field of view
1300 if (scr_fov.value < 1)
1301 Cvar_Set ("fov","1");
1302 if (scr_fov.value > 170)
1303 Cvar_Set ("fov","170");
1305 // intermission is always full screen
1306 if (cl.intermission)
1313 if (scr_viewsize.value >= 120)
1314 sb_lines = 0; // no status bar at all
1315 else if (scr_viewsize.value >= 110)
1316 sb_lines = 24; // no inventory
1319 size = scr_viewsize.value * (1.0 / 100.0);
1320 size = min(size, 1);
1323 r_refdef.width = vid.realwidth * size;
1324 r_refdef.height = vid.realheight * size;
1325 r_refdef.x = (vid.realwidth - r_refdef.width)/2;
1326 r_refdef.y = (vid.realheight - r_refdef.height)/2;
1328 // LordHavoc: viewzoom (zoom in for sniper rifles, etc)
1329 r_refdef.fov_x = scr_fov.value * cl.viewzoom;
1330 r_refdef.fov_y = CalcFov (r_refdef.fov_x, r_refdef.width, r_refdef.height);
1332 if (r_waterwarp.value > 0)
1336 Mod_CheckLoaded(cl.worldmodel);
1337 contents = CL_PointSuperContents(r_vieworigin);
1338 if (contents & SUPERCONTENTS_LIQUIDSMASK)
1340 r_refdef.fov_x *= 1 - (((sin(cl.time * 4.7) + 1) * 0.015) * r_waterwarp.value);
1341 r_refdef.fov_y *= 1 - (((sin(cl.time * 3.0) + 1) * 0.015) * r_waterwarp.value);
1348 if (scr_zoomwindow.integer)
1350 float sizex = bound(10, scr_zoomwindow_viewsizex.value, 100) / 100.0;
1351 float sizey = bound(10, scr_zoomwindow_viewsizey.value, 100) / 100.0;
1352 r_refdef.width = vid.realwidth * sizex;
1353 r_refdef.height = vid.realheight * sizey;
1354 r_refdef.x = (vid.realwidth - r_refdef.width)/2;
1356 r_refdef.fov_x = scr_zoomwindow_fov.value;
1357 r_refdef.fov_y = CalcFov(r_refdef.fov_x, r_refdef.width, r_refdef.height);
1367 r_showtrispass = false;
1368 else if (r_showtris.value > 0)
1371 GL_BlendFunc(GL_ONE, GL_ONE);
1372 GL_DepthTest(GL_FALSE);
1373 GL_DepthMask(GL_FALSE);
1374 memset(&m, 0, sizeof(m));
1376 r_showtrispass = true;
1377 GL_ShowTrisColor(0.2,0.2,0.2,1);
1381 if (gl_delayfinish.integer)
1383 // tell driver to commit it's partially full geometry queue to the rendering queue
1384 // (this doesn't wait for the commands themselves to complete)
1390 R_TimeReport("meshfinish");
1392 R_TimeReport("finish");
1397 //===========================================================================
1398 // dynamic vertex array buffer subsystem
1399 //===========================================================================
1401 float varray_vertex3f[65536*3];
1402 float varray_color4f[65536*4];
1403 float varray_texcoord2f[4][65536*2];
1404 float varray_texcoord3f[4][65536*3];
1405 float varray_normal3f[65536*3];
1406 int earray_element3i[65536];
1408 //===========================================================================
1409 // vertex array caching subsystem
1410 //===========================================================================
1412 typedef struct rcachearraylink_s
1414 struct rcachearraylink_s *next, *prev;
1415 struct rcachearrayitem_s *data;
1419 typedef struct rcachearrayitem_s
1421 // the original request structure
1422 rcachearrayrequest_t request;
1425 // offset into r_mesh_rcachedata
1427 // for linking this into the sequential list
1428 rcachearraylink_t sequentiallink;
1429 // for linking this into the lookup list
1430 rcachearraylink_t hashlink;
1434 #define RCACHEARRAY_HASHSIZE 65536
1435 #define RCACHEARRAY_ITEMS 4096
1436 #define RCACHEARRAY_DEFAULTSIZE (4 << 20)
1438 // all active items are linked into this chain in sorted order
1439 static rcachearraylink_t r_mesh_rcachesequentialchain;
1440 // all inactive items are linked into this chain in unknown order
1441 static rcachearraylink_t r_mesh_rcachefreechain;
1442 // all active items are also linked into these chains (using their hashlink)
1443 static rcachearraylink_t r_mesh_rcachechain[RCACHEARRAY_HASHSIZE];
1445 // all items are stored here, whether active or inactive
1446 static rcachearrayitem_t r_mesh_rcacheitems[RCACHEARRAY_ITEMS];
1448 // size of data buffer
1449 static int r_mesh_rcachedata_size = RCACHEARRAY_DEFAULTSIZE;
1451 static qbyte r_mesh_rcachedata[RCACHEARRAY_DEFAULTSIZE];
1454 static int r_mesh_rcachedata_offset;
1455 static rcachearraylink_t *r_mesh_rcachesequentialchain_current;
1457 static void R_Mesh_CacheArray_Startup(void)
1460 rcachearraylink_t *l;
1461 // prepare all the linked lists
1462 l = &r_mesh_rcachesequentialchain;l->next = l->prev = l;l->data = NULL;
1463 l = &r_mesh_rcachefreechain;l->next = l->prev = l;l->data = NULL;
1464 memset(&r_mesh_rcachechain, 0, sizeof(r_mesh_rcachechain));
1465 for (i = 0;i < RCACHEARRAY_HASHSIZE;i++)
1467 l = &r_mesh_rcachechain[i];
1468 l->next = l->prev = l;
1471 memset(&r_mesh_rcacheitems, 0, sizeof(r_mesh_rcacheitems));
1472 for (i = 0;i < RCACHEARRAY_ITEMS;i++)
1474 r_mesh_rcacheitems[i].hashlink.data = r_mesh_rcacheitems[i].sequentiallink.data = &r_mesh_rcacheitems[i];
1475 l = &r_mesh_rcacheitems[i].sequentiallink;
1476 l->next = &r_mesh_rcachefreechain;
1477 l->prev = l->next->prev;
1478 l->next->prev = l->prev->next = l;
1480 // clear other state
1481 r_mesh_rcachedata_offset = 0;
1482 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1485 static void R_Mesh_CacheArray_Shutdown(void)
1490 static void R_Mesh_CacheArray_ValidateState(int num)
1492 rcachearraylink_t *l, *lhead;
1493 lhead = &r_mesh_rcachesequentialchain;
1494 if (r_mesh_rcachesequentialchain_current == lhead)
1496 for (l = lhead->next;l != lhead;l = l->next)
1497 if (r_mesh_rcachesequentialchain_current == l)
1499 Sys_Error("%i", num);
1503 int R_Mesh_CacheArray(rcachearrayrequest_t *r)
1505 rcachearraylink_t *l, *lhead, *lnext;
1506 rcachearrayitem_t *d;
1507 int hashindex, offset, offsetend;
1509 //R_Mesh_CacheArray_ValidateState(3);
1510 // calculate a hashindex to choose a cache chain
1512 hashindex = CRC_Block((void *)r, sizeof(*r)) % RCACHEARRAY_HASHSIZE;
1514 // is it already cached?
1515 for (lhead = &r_mesh_rcachechain[hashindex], l = lhead->next;l != lhead;l = l->next)
1517 if (!memcmp(&l->data->request, r, sizeof(l->data->request)))
1519 // we have it cached already
1520 r->data = r_mesh_rcachedata + l->data->offset;
1525 // we need to add a new cache item, this means finding a place for the new
1526 // data and making sure we have a free item available, lots of work...
1528 // check if buffer needs to wrap
1529 if (r_mesh_rcachedata_offset + r->data_size > r_mesh_rcachedata_size)
1532 if (r->data_size * 10 > r_mesh_rcachedata_size)
1534 // realloc whole cache
1537 // reset back to start
1538 r_mesh_rcachedata_offset = 0;
1539 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1541 offset = r_mesh_rcachedata_offset;
1542 r_mesh_rcachedata_offset += r->data_size;
1543 offsetend = r_mesh_rcachedata_offset;
1544 //R_Mesh_CacheArray_ValidateState(4);
1549 for (lhead = &r_mesh_rcachesequentialchain, l = lhead->next, n = 0;l != lhead;l = l->next, n++);
1550 Con_Printf("R_Mesh_CacheArray: new data range %i:%i, %i items are already linked\n", offset, offsetend, n);
1554 // make room for the new data (remove old items)
1555 lhead = &r_mesh_rcachesequentialchain;
1556 l = r_mesh_rcachesequentialchain_current;
1559 while (l != lhead && l->data->offset < offsetend && l->data->offset + l->data->request.data_size > offset)
1561 //r_mesh_rcachesequentialchain_current = l;
1562 //R_Mesh_CacheArray_ValidateState(8);
1564 // if at the end of the chain, wrap around
1566 lnext = lnext->next;
1567 //r_mesh_rcachesequentialchain_current = lnext;
1568 //R_Mesh_CacheArray_ValidateState(10);
1570 // unlink from sequential chain
1571 l->next->prev = l->prev;
1572 l->prev->next = l->next;
1573 //R_Mesh_CacheArray_ValidateState(11);
1574 // link into free chain
1575 l->next = &r_mesh_rcachefreechain;
1576 l->prev = l->next->prev;
1577 l->next->prev = l->prev->next = l;
1578 //R_Mesh_CacheArray_ValidateState(12);
1580 l = &l->data->hashlink;
1581 // unlink from hash chain
1582 l->next->prev = l->prev;
1583 l->prev->next = l->next;
1586 //r_mesh_rcachesequentialchain_current = l;
1587 //R_Mesh_CacheArray_ValidateState(9);
1589 //r_mesh_rcachesequentialchain_current = l;
1590 //R_Mesh_CacheArray_ValidateState(5);
1591 // gobble an extra item if we have no free items available
1592 if (r_mesh_rcachefreechain.next == &r_mesh_rcachefreechain)
1596 // unlink from sequential chain
1597 l->next->prev = l->prev;
1598 l->prev->next = l->next;
1599 // link into free chain
1600 l->next = &r_mesh_rcachefreechain;
1601 l->prev = l->next->prev;
1602 l->next->prev = l->prev->next = l;
1604 l = &l->data->hashlink;
1605 // unlink from hash chain
1606 l->next->prev = l->prev;
1607 l->prev->next = l->next;
1611 r_mesh_rcachesequentialchain_current = l;
1612 //R_Mesh_CacheArray_ValidateState(6);
1614 // now take an item from the free chain
1615 l = r_mesh_rcachefreechain.next;
1621 l->next->prev = l->prev;
1622 l->prev->next = l->next;
1623 // relink to sequential
1624 l->next = r_mesh_rcachesequentialchain_current->prev;
1625 l->prev = l->next->prev;
1626 while (l->next->data && l->data && l->next->data->offset <= d->offset)
1629 l->next = l->next->next;
1630 l->prev = l->prev->next;
1632 while (l->prev->data && l->data && l->prev->data->offset >= d->offset)
1635 l->prev = l->prev->prev;
1636 l->next = l->next->prev;
1638 l->next->prev = l->prev->next = l;
1639 // also link into hash chain
1640 l = &l->data->hashlink;
1641 l->next = &r_mesh_rcachechain[hashindex];
1642 l->prev = l->next->prev;
1644 l->next->prev = l->prev->next = l;
1647 //r_mesh_rcachesequentialchain_current = d->sequentiallink.next;
1649 //R_Mesh_CacheArray_ValidateState(7);
1650 // and finally set the data pointer
1651 r->data = r_mesh_rcachedata + d->offset;
1652 // and tell the caller to fill the array