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 gl_dither = {CVAR_SAVE, "gl_dither", "1"}; // whether or not to use dithering
16 cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
18 int gl_maxdrawrangeelementsvertices;
19 int gl_maxdrawrangeelementsindices;
24 void GL_PrintError(int errornumber, char *filename, int linenumber)
28 #ifdef GL_INVALID_ENUM
30 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
33 #ifdef GL_INVALID_VALUE
34 case GL_INVALID_VALUE:
35 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
38 #ifdef GL_INVALID_OPERATION
39 case GL_INVALID_OPERATION:
40 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
43 #ifdef GL_STACK_OVERFLOW
44 case GL_STACK_OVERFLOW:
45 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
48 #ifdef GL_STACK_UNDERFLOW
49 case GL_STACK_UNDERFLOW:
50 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
53 #ifdef GL_OUT_OF_MEMORY
54 case GL_OUT_OF_MEMORY:
55 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
58 #ifdef GL_TABLE_TOO_LARGE
59 case GL_TABLE_TOO_LARGE:
60 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
64 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
70 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active\n");
72 int c_meshs, c_meshelements;
74 void SCR_ScreenShot_f (void);
76 static matrix4x4_t backend_viewmatrix;
77 static matrix4x4_t backend_modelmatrix;
78 static matrix4x4_t backend_modelviewmatrix;
79 static matrix4x4_t backend_glmodelviewmatrix;
80 static matrix4x4_t backend_projectmatrix;
82 static int backendunits, backendactive;
83 static mempool_t *gl_backend_mempool;
86 note: here's strip order for a terrain row:
93 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
95 *elements++ = i + row;
97 *elements++ = i + row + 1;
100 *elements++ = i + row + 1;
103 for (y = 0;y < rows - 1;y++)
105 for (x = 0;x < columns - 1;x++)
108 *elements++ = i + columns;
110 *elements++ = i + columns + 1;
113 *elements++ = i + columns + 1;
124 for (y = 0;y < rows - 1;y++)
126 for (x = 0;x < columns - 1;x++)
130 *elements++ = i + columns;
131 *elements++ = i + columns + 1;
132 *elements++ = i + columns;
133 *elements++ = i + columns + 1;
139 int polygonelements[768];
141 static void R_Mesh_CacheArray_Startup(void);
142 static void R_Mesh_CacheArray_Shutdown(void);
143 void GL_Backend_AllocArrays(void)
145 if (!gl_backend_mempool)
146 gl_backend_mempool = Mem_AllocPool("GL_Backend");
147 R_Mesh_CacheArray_Startup();
150 void GL_Backend_FreeArrays(void)
152 R_Mesh_CacheArray_Shutdown();
153 Mem_FreePool(&gl_backend_mempool);
156 static void gl_backend_start(void)
158 Con_DPrint("OpenGL Backend started\n");
159 if (qglDrawRangeElements != NULL)
162 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
164 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
166 Con_DPrintf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
169 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
171 GL_Backend_AllocArrays();
173 backendactive = true;
176 static void gl_backend_shutdown(void)
179 backendactive = false;
181 Con_DPrint("OpenGL Backend shutting down\n");
183 GL_Backend_FreeArrays();
186 static void gl_backend_newmap(void)
190 cvar_t scr_zoomwindow = {CVAR_SAVE, "scr_zoomwindow", "0"};
191 cvar_t scr_zoomwindow_viewsizex = {CVAR_SAVE, "scr_zoomwindow_viewsizex", "20"};
192 cvar_t scr_zoomwindow_viewsizey = {CVAR_SAVE, "scr_zoomwindow_viewsizey", "20"};
193 cvar_t scr_zoomwindow_fov = {CVAR_SAVE, "scr_zoomwindow_fov", "20"};
195 void gl_backend_init(void)
199 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
201 polygonelements[i * 3 + 0] = 0;
202 polygonelements[i * 3 + 1] = i + 1;
203 polygonelements[i * 3 + 2] = i + 2;
206 Cvar_RegisterVariable(&r_render);
207 Cvar_RegisterVariable(&gl_dither);
208 Cvar_RegisterVariable(&gl_lockarrays);
209 Cvar_RegisterVariable(&gl_delayfinish);
210 Cvar_RegisterVariable(&gl_paranoid);
211 Cvar_RegisterVariable(&gl_printcheckerror);
213 Cvar_SetValue("r_render", 0);
216 Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
217 Cvar_RegisterVariable(&gl_mesh_testarrayelement);
218 Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
220 Cvar_RegisterVariable(&scr_zoomwindow);
221 Cvar_RegisterVariable(&scr_zoomwindow_viewsizex);
222 Cvar_RegisterVariable(&scr_zoomwindow_viewsizey);
223 Cvar_RegisterVariable(&scr_zoomwindow_fov);
225 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
228 void GL_SetupView_Orientation_Identity (void)
230 Matrix4x4_CreateIdentity(&backend_viewmatrix);
231 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
234 void GL_SetupView_Orientation_FromEntity(matrix4x4_t *matrix)
236 matrix4x4_t tempmatrix, basematrix;
237 Matrix4x4_Invert_Simple(&tempmatrix, matrix);
238 Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
239 Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
240 Matrix4x4_Concat(&backend_viewmatrix, &basematrix, &tempmatrix);
241 //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
242 //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
243 //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
244 //Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
245 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
248 void GL_SetupView_Mode_Perspective (double fovx, double fovy, double zNear, double zFar)
253 if (!r_render.integer)
257 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
258 qglLoadIdentity();CHECKGLERROR
260 xmax = zNear * tan(fovx * M_PI / 360.0);
261 ymax = zNear * tan(fovy * M_PI / 360.0);
263 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
264 qglGetDoublev(GL_PROJECTION_MATRIX, m);
265 backend_projectmatrix.m[0][0] = m[0];
266 backend_projectmatrix.m[1][0] = m[1];
267 backend_projectmatrix.m[2][0] = m[2];
268 backend_projectmatrix.m[3][0] = m[3];
269 backend_projectmatrix.m[0][1] = m[4];
270 backend_projectmatrix.m[1][1] = m[5];
271 backend_projectmatrix.m[2][1] = m[6];
272 backend_projectmatrix.m[3][1] = m[7];
273 backend_projectmatrix.m[0][2] = m[8];
274 backend_projectmatrix.m[1][2] = m[9];
275 backend_projectmatrix.m[2][2] = m[10];
276 backend_projectmatrix.m[3][2] = m[11];
277 backend_projectmatrix.m[0][3] = m[12];
278 backend_projectmatrix.m[1][3] = m[13];
279 backend_projectmatrix.m[2][3] = m[14];
280 backend_projectmatrix.m[3][3] = m[15];
281 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
282 GL_SetupView_Orientation_Identity();
285 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
289 if (!r_render.integer)
293 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
294 qglLoadIdentity();CHECKGLERROR
296 nudge = 1.0 - 1.0 / (1<<23);
297 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
302 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
311 m[14] = -2 * zNear * nudge;
314 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
315 GL_SetupView_Orientation_Identity();
316 backend_projectmatrix.m[0][0] = m[0];
317 backend_projectmatrix.m[1][0] = m[1];
318 backend_projectmatrix.m[2][0] = m[2];
319 backend_projectmatrix.m[3][0] = m[3];
320 backend_projectmatrix.m[0][1] = m[4];
321 backend_projectmatrix.m[1][1] = m[5];
322 backend_projectmatrix.m[2][1] = m[6];
323 backend_projectmatrix.m[3][1] = m[7];
324 backend_projectmatrix.m[0][2] = m[8];
325 backend_projectmatrix.m[1][2] = m[9];
326 backend_projectmatrix.m[2][2] = m[10];
327 backend_projectmatrix.m[3][2] = m[11];
328 backend_projectmatrix.m[0][3] = m[12];
329 backend_projectmatrix.m[1][3] = m[13];
330 backend_projectmatrix.m[2][3] = m[14];
331 backend_projectmatrix.m[3][3] = m[15];
334 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
338 if (!r_render.integer)
342 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
343 qglLoadIdentity();CHECKGLERROR
344 qglOrtho(x1, x2, y2, y1, zNear, zFar);
345 qglGetDoublev(GL_PROJECTION_MATRIX, m);
346 backend_projectmatrix.m[0][0] = m[0];
347 backend_projectmatrix.m[1][0] = m[1];
348 backend_projectmatrix.m[2][0] = m[2];
349 backend_projectmatrix.m[3][0] = m[3];
350 backend_projectmatrix.m[0][1] = m[4];
351 backend_projectmatrix.m[1][1] = m[5];
352 backend_projectmatrix.m[2][1] = m[6];
353 backend_projectmatrix.m[3][1] = m[7];
354 backend_projectmatrix.m[0][2] = m[8];
355 backend_projectmatrix.m[1][2] = m[9];
356 backend_projectmatrix.m[2][2] = m[10];
357 backend_projectmatrix.m[3][2] = m[11];
358 backend_projectmatrix.m[0][3] = m[12];
359 backend_projectmatrix.m[1][3] = m[13];
360 backend_projectmatrix.m[2][3] = m[14];
361 backend_projectmatrix.m[3][3] = m[15];
362 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
363 GL_SetupView_Orientation_Identity();
366 typedef struct gltextureunit_s
368 int t1d, t2d, t3d, tcubemap;
371 const void *pointer_texcoord;
372 float rgbscale, alphascale;
373 int combinergb, combinealpha;
374 // FIXME: add more combine stuff
375 // texmatrixenabled exists only to avoid unnecessary texmatrix compares
376 int texmatrixenabled;
387 int colormask; // stored as bottom 4 bits: r g b a (3 2 1 0 order)
392 gltextureunit_t units[MAX_TEXTUREUNITS];
396 const void *pointer_vertex;
397 const void *pointer_color;
401 void GL_SetupTextureState(void)
404 gltextureunit_t *unit;
407 gl_state.clientunit = -1;
408 for (i = 0;i < backendunits;i++)
411 GL_ClientActiveTexture(i);
412 unit = gl_state.units + i;
417 unit->arrayenabled = false;
418 unit->arrayis3d = false;
419 unit->pointer_texcoord = NULL;
421 unit->alphascale = 1;
422 unit->combinergb = GL_MODULATE;
423 unit->combinealpha = GL_MODULATE;
424 unit->texmatrixenabled = false;
425 unit->matrix = r_identitymatrix;
426 qglMatrixMode(GL_TEXTURE);
428 qglMatrixMode(GL_MODELVIEW);
430 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
431 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
433 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
434 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
437 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
439 if (gl_texturecubemap)
441 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
443 if (gl_combine.integer)
445 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
446 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
447 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
448 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
449 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
450 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
451 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
452 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
453 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
454 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
455 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
456 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
457 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
458 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
459 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
460 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
461 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
465 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
471 void GL_Backend_ResetState(void)
473 memset(&gl_state, 0, sizeof(gl_state));
474 gl_state.depthtest = true;
475 gl_state.blendfunc1 = GL_ONE;
476 gl_state.blendfunc2 = GL_ZERO;
477 gl_state.blend = false;
478 gl_state.depthmask = GL_TRUE;
479 gl_state.colormask = 15;
480 gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
481 gl_state.lockrange_first = 0;
482 gl_state.lockrange_count = 0;
483 gl_state.pointer_vertex = NULL;
484 gl_state.pointer_color = NULL;
488 qglColorMask(1, 1, 1, 1);
489 qglEnable(GL_CULL_FACE);CHECKGLERROR
490 qglCullFace(GL_FRONT);CHECKGLERROR
491 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
492 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
493 qglDisable(GL_BLEND);CHECKGLERROR
494 qglDepthMask(gl_state.depthmask);CHECKGLERROR
496 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
497 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
499 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
500 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
502 GL_Color(0, 0, 0, 0);
503 GL_Color(1, 1, 1, 1);
505 GL_SetupTextureState();
508 void GL_ActiveTexture(int num)
510 if (gl_state.unit != num)
513 if (qglActiveTexture)
515 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
521 void GL_ClientActiveTexture(int num)
523 if (gl_state.clientunit != num)
525 gl_state.clientunit = num;
526 if (qglActiveTexture)
528 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
534 void GL_BlendFunc(int blendfunc1, int blendfunc2)
536 if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
540 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
541 if (gl_state.blendfunc2 == GL_ZERO)
543 if (gl_state.blendfunc1 == GL_ONE)
548 qglDisable(GL_BLEND);CHECKGLERROR
556 qglEnable(GL_BLEND);CHECKGLERROR
565 qglEnable(GL_BLEND);CHECKGLERROR
571 void GL_DepthMask(int state)
573 if (gl_state.depthmask != state)
577 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
581 void GL_DepthTest(int state)
583 if (gl_state.depthtest != state)
587 gl_state.depthtest = state;
588 if (gl_state.depthtest)
590 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
594 qglDisable(GL_DEPTH_TEST);CHECKGLERROR
599 void GL_ColorMask(int r, int g, int b, int a)
601 int state = r*8 + g*4 + b*2 + a*1;
602 if (gl_state.colormask != state)
606 gl_state.colormask = state;
607 qglColorMask((GLboolean)r, (GLboolean)g, (GLboolean)b, (GLboolean)a);CHECKGLERROR
611 void GL_Color(float cr, float cg, float cb, float ca)
613 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)
617 gl_state.color4f[0] = cr;
618 gl_state.color4f[1] = cg;
619 gl_state.color4f[2] = cb;
620 gl_state.color4f[3] = ca;
622 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
627 void GL_ShowTrisColor(float cr, float cg, float cb, float ca)
631 r_showtrispass = false;
632 GL_Color(cr * r_showtris.value, cg * r_showtris.value, cb * r_showtris.value, ca);
633 r_showtrispass = true;
637 void GL_LockArrays(int first, int count)
639 if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
641 if (gl_state.lockrange_count)
643 gl_state.lockrange_count = 0;
645 qglUnlockArraysEXT();
648 if (count && gl_supportslockarrays && gl_lockarrays.integer && r_render.integer)
650 gl_state.lockrange_first = first;
651 gl_state.lockrange_count = count;
653 qglLockArraysEXT(first, count);
659 void GL_Scissor (int x, int y, int width, int height)
662 qglScissor(x, vid.realheight - (y + height),width,height);
666 void GL_ScissorTest(int state)
668 if(gl_state.scissortest == state)
672 if((gl_state.scissortest = state))
673 qglEnable(GL_SCISSOR_TEST);
675 qglDisable(GL_SCISSOR_TEST);
679 void GL_Clear(int mask)
683 qglClear(mask);CHECKGLERROR
686 void GL_TransformToScreen(const vec4_t in, vec4_t out)
690 Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
691 Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
693 out[0] = r_view_x + (out[0] * iw + 1.0f) * r_view_width * 0.5f;
694 out[1] = r_view_y + (out[1] * iw + 1.0f) * r_view_height * 0.5f;
695 out[2] = out[2] * iw;
698 // called at beginning of frame
699 void R_Mesh_Start(void)
703 GL_Backend_ResetState();
706 int gl_backend_rebindtextures;
708 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
713 for (i = 0;i < count;i++)
714 *out++ = *in++ + offset;
717 memcpy(out, in, sizeof(*out) * count);
720 // renders triangles using vertices from the active arrays
721 int paranoidblah = 0;
722 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
724 int numelements = numtriangles * 3;
725 if (numverts == 0 || numtriangles == 0)
727 Con_Printf("R_Mesh_Draw(%d, %d, %08p);\n", numverts, numtriangles, elements);
733 R_Mesh_Draw_ShowTris(numverts, numtriangles, elements);
737 c_meshelements += numelements;
738 if (gl_paranoid.integer)
742 if (!qglIsEnabled(GL_VERTEX_ARRAY))
743 Con_Print("R_Mesh_Draw: vertex array not enabled\n");
744 for (j = 0, size = numverts * (int)sizeof(float[3]), p = gl_state.pointer_vertex;j < size;j += sizeof(int), p++)
746 if (gl_state.pointer_color)
748 if (!qglIsEnabled(GL_COLOR_ARRAY))
749 Con_Print("R_Mesh_Draw: color array set but not enabled\n");
750 for (j = 0, size = numverts * (int)sizeof(float[4]), p = gl_state.pointer_color;j < size;j += sizeof(int), p++)
753 for (i = 0;i < backendunits;i++)
755 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)
757 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))
758 Con_Print("R_Mesh_Draw: array enabled but no texture bound\n");
759 GL_ClientActiveTexture(i);
760 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
761 Con_Print("R_Mesh_Draw: texcoord array set but not enabled\n");
762 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++)
766 for (i = 0;i < numtriangles * 3;i++)
768 if (elements[i] < 0 || elements[i] >= numverts)
770 Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range 0 - %i) in elements list\n", elements[i], numverts);
776 if (r_render.integer)
779 if (gl_mesh_testmanualfeeding.integer)
783 qglBegin(GL_TRIANGLES);
784 for (i = 0;i < numtriangles * 3;i++)
786 for (j = 0;j < backendunits;j++)
788 if (gl_state.units[j].pointer_texcoord)
790 if (backendunits > 1)
792 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
794 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
795 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
799 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
800 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
805 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
807 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
808 qglTexCoord3f(p[0], p[1], p[2]);
812 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
813 qglTexCoord2f(p[0], p[1]);
818 if (gl_state.pointer_color)
820 p = ((const GLfloat *)(gl_state.pointer_color)) + elements[i] * 4;
821 qglColor4f(p[0], p[1], p[2], p[3]);
823 p = ((const GLfloat *)(gl_state.pointer_vertex)) + elements[i] * 3;
824 qglVertex3f(p[0], p[1], p[2]);
829 else if (gl_mesh_testarrayelement.integer)
832 qglBegin(GL_TRIANGLES);
833 for (i = 0;i < numtriangles * 3;i++)
835 qglArrayElement(elements[i]);
840 else if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
842 qglDrawRangeElements(GL_TRIANGLES, 0, numverts, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
846 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
852 // restores backend state, used when done with 3D rendering
853 void R_Mesh_Finish(void)
861 for (i = backendunits - 1;i >= 0;i--)
863 if (qglActiveTexture)
864 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
865 if (qglClientActiveTexture)
866 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
867 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
868 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
869 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
872 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
874 if (gl_texturecubemap)
876 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
878 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
879 if (gl_combine.integer)
881 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
882 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
885 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
886 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
888 qglDisable(GL_BLEND);CHECKGLERROR
889 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
890 qglDepthMask(GL_TRUE);CHECKGLERROR
891 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
894 void R_Mesh_Matrix(const matrix4x4_t *matrix)
896 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
898 backend_modelmatrix = *matrix;
899 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
900 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
901 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
905 void R_Mesh_State(const rmeshstate_t *m)
907 int i, combinergb, combinealpha, scale;
908 gltextureunit_t *unit;
909 matrix4x4_t tempmatrix;
913 if (gl_state.pointer_vertex != m->pointer_vertex)
915 gl_state.pointer_vertex = m->pointer_vertex;
917 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), gl_state.pointer_vertex);
924 if (gl_state.pointer_color != m->pointer_color)
927 if (!gl_state.pointer_color)
929 qglEnableClientState(GL_COLOR_ARRAY);
932 else if (!m->pointer_color)
934 qglDisableClientState(GL_COLOR_ARRAY);
936 // when color array is on the glColor gets trashed, set it again
937 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
940 gl_state.pointer_color = m->pointer_color;
941 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), gl_state.pointer_color);
945 if (gl_backend_rebindtextures)
947 gl_backend_rebindtextures = false;
948 GL_SetupTextureState();
951 for (i = 0, unit = gl_state.units;i < backendunits;i++, unit++)
953 // update 1d texture binding
954 if (unit->t1d != m->tex1d[i])
961 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
963 unit->t1d = m->tex1d[i];
965 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
973 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
977 // update 2d texture binding
978 if (unit->t2d != m->tex[i])
985 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
987 unit->t2d = m->tex[i];
989 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
997 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1001 // update 3d texture binding
1002 if (unit->t3d != m->tex3d[i])
1008 GL_ActiveTexture(i);
1009 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1011 unit->t3d = m->tex3d[i];
1012 GL_ActiveTexture(i);
1013 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1020 GL_ActiveTexture(i);
1021 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1025 // update cubemap texture binding
1026 if (unit->tcubemap != m->texcubemap[i])
1028 if (m->texcubemap[i])
1030 if (unit->tcubemap == 0)
1032 GL_ActiveTexture(i);
1033 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1035 unit->tcubemap = m->texcubemap[i];
1036 GL_ActiveTexture(i);
1037 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1044 GL_ActiveTexture(i);
1045 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1049 // update texture unit settings if the unit is enabled
1050 if (unit->t1d || unit->t2d || unit->t3d || unit->tcubemap)
1052 // texture unit is enabled, enable the array
1053 if (!unit->arrayenabled)
1055 unit->arrayenabled = true;
1056 GL_ClientActiveTexture(i);
1057 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1059 // update combine settings
1060 if (gl_combine.integer)
1062 // GL_ARB_texture_env_combine
1063 combinergb = m->texcombinergb[i] ? m->texcombinergb[i] : GL_MODULATE;
1064 if (unit->combinergb != combinergb)
1066 unit->combinergb = combinergb;
1067 GL_ActiveTexture(i);
1068 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
1070 combinealpha = m->texcombinealpha[i] ? m->texcombinealpha[i] : GL_MODULATE;
1071 if (unit->combinealpha != combinealpha)
1073 unit->combinealpha = combinealpha;
1074 GL_ActiveTexture(i);
1075 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
1077 scale = max(m->texrgbscale[i], 1);
1078 if (unit->rgbscale != scale)
1080 GL_ActiveTexture(i);
1081 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = scale));CHECKGLERROR
1083 scale = max(m->texalphascale[i], 1);
1084 if (unit->alphascale != scale)
1086 GL_ActiveTexture(i);
1087 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = scale));CHECKGLERROR
1093 combinergb = m->texcombinergb[i] ? m->texcombinergb[i] : GL_MODULATE;
1094 if (unit->combinergb != combinergb)
1096 unit->combinergb = combinergb;
1097 GL_ActiveTexture(i);
1098 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
1101 // update array settings
1102 if (m->pointer_texcoord3f[i])
1104 // 3d texcoord array
1105 if (unit->pointer_texcoord != m->pointer_texcoord3f[i] || !unit->arrayis3d)
1107 unit->pointer_texcoord = m->pointer_texcoord3f[i];
1108 unit->arrayis3d = true;
1109 GL_ClientActiveTexture(i);
1110 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[3]), unit->pointer_texcoord);
1116 // 2d texcoord array
1117 if (unit->pointer_texcoord != m->pointer_texcoord[i] || unit->arrayis3d)
1119 unit->pointer_texcoord = m->pointer_texcoord[i];
1120 unit->arrayis3d = false;
1121 GL_ClientActiveTexture(i);
1122 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), unit->pointer_texcoord);
1127 if (m->texmatrix[i].m[3][3])
1129 // texmatrix specified, check if it is different
1130 if (!unit->texmatrixenabled || memcmp(&unit->matrix, &m->texmatrix[i], sizeof(matrix4x4_t)))
1132 unit->texmatrixenabled = true;
1133 unit->matrix = m->texmatrix[i];
1134 Matrix4x4_Transpose(&tempmatrix, &unit->matrix);
1135 qglMatrixMode(GL_TEXTURE);
1136 GL_ActiveTexture(i);
1137 qglLoadMatrixf(&tempmatrix.m[0][0]);
1138 qglMatrixMode(GL_MODELVIEW);
1143 // no texmatrix specified, revert to identity
1144 if (unit->texmatrixenabled)
1146 unit->texmatrixenabled = false;
1147 qglMatrixMode(GL_TEXTURE);
1148 GL_ActiveTexture(i);
1150 qglMatrixMode(GL_MODELVIEW);
1156 // texture unit is disabled, disable the array
1157 if (unit->arrayenabled)
1159 unit->arrayenabled = false;
1160 GL_ClientActiveTexture(i);
1161 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1163 // no need to update most settings on a disabled texture unit
1168 void R_Mesh_Draw_ShowTris(int numverts, int numtriangles, const int *elements)
1171 for (;numtriangles;numtriangles--, elements += 3)
1173 qglArrayElement(elements[0]);qglArrayElement(elements[1]);
1174 qglArrayElement(elements[1]);qglArrayElement(elements[2]);
1175 qglArrayElement(elements[2]);qglArrayElement(elements[0]);
1182 ==============================================================================
1186 ==============================================================================
1189 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height, qboolean jpeg)
1194 if (!r_render.integer)
1197 buffer = Mem_Alloc(tempmempool, width*height*3);
1198 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
1202 ret = JPEG_SaveImage_preflipped (filename, width, height, buffer);
1204 ret = Image_WriteTGARGB_preflipped (filename, width, height, buffer);
1210 //=============================================================================
1212 void R_ClearScreen(void)
1214 if (r_render.integer)
1217 qglClearColor(0,0,0,0);CHECKGLERROR
1218 qglClearDepth(1);CHECKGLERROR
1221 // LordHavoc: we use a stencil centered around 128 instead of 0,
1222 // to avoid clamping interfering with strange shadow volume
1224 qglClearStencil(128);CHECKGLERROR
1227 GL_Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));
1228 // set dithering mode
1229 if (gl_dither.integer)
1231 qglEnable(GL_DITHER);CHECKGLERROR
1235 qglDisable(GL_DITHER);CHECKGLERROR
1241 ====================
1243 ====================
1245 float CalcFov (float fov_x, float width, float height)
1247 // calculate vision size and alter by aspect, then convert back to angle
1248 return atan (height / (width / tan(fov_x/360*M_PI))) * 360 / M_PI;
1255 This is called every frame, and can also be called explicitly to flush
1259 void SCR_UpdateScreen (void)
1261 if (gl_delayfinish.integer)
1264 R_TimeReport("meshfinish");
1266 R_TimeReport("finish");
1271 if (r_textureunits.integer > gl_textureunits)
1272 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
1273 if (r_textureunits.integer < 1)
1274 Cvar_SetValueQuick(&r_textureunits, 1);
1276 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
1277 Cvar_SetValueQuick(&gl_combine, 0);
1280 R_TimeReport("setup");
1284 R_TimeReport("clear");
1286 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
1292 if (scr_viewsize.value < 30)
1293 Cvar_Set ("viewsize","30");
1294 if (scr_viewsize.value > 120)
1295 Cvar_Set ("viewsize","120");
1297 // bound field of view
1298 if (scr_fov.value < 1)
1299 Cvar_Set ("fov","1");
1300 if (scr_fov.value > 170)
1301 Cvar_Set ("fov","170");
1303 // intermission is always full screen
1304 if (cl.intermission)
1311 if (scr_viewsize.value >= 120)
1312 sb_lines = 0; // no status bar at all
1313 else if (scr_viewsize.value >= 110)
1314 sb_lines = 24; // no inventory
1317 size = scr_viewsize.value * (1.0 / 100.0);
1318 size = min(size, 1);
1321 r_refdef.width = vid.realwidth * size;
1322 r_refdef.height = vid.realheight * size;
1323 r_refdef.x = (vid.realwidth - r_refdef.width)/2;
1324 r_refdef.y = (vid.realheight - r_refdef.height)/2;
1326 // LordHavoc: viewzoom (zoom in for sniper rifles, etc)
1327 r_refdef.fov_x = scr_fov.value * cl.viewzoom;
1328 r_refdef.fov_y = CalcFov (r_refdef.fov_x, r_refdef.width, r_refdef.height);
1332 Mod_CheckLoaded(cl.worldmodel);
1333 contents = CL_PointSuperContents(r_vieworigin);
1334 if (contents & SUPERCONTENTS_LIQUIDSMASK)
1336 r_refdef.fov_x *= (sin(cl.time * 4.7) * 0.015 + 0.985);
1337 r_refdef.fov_y *= (sin(cl.time * 3.0) * 0.015 + 0.985);
1343 if (scr_zoomwindow.integer)
1345 float sizex = bound(10, scr_zoomwindow_viewsizex.value, 100) / 100.0;
1346 float sizey = bound(10, scr_zoomwindow_viewsizey.value, 100) / 100.0;
1347 r_refdef.width = vid.realwidth * sizex;
1348 r_refdef.height = vid.realheight * sizey;
1349 r_refdef.x = (vid.realwidth - r_refdef.width)/2;
1351 r_refdef.fov_x = scr_zoomwindow_fov.value;
1352 r_refdef.fov_y = CalcFov(r_refdef.fov_x, r_refdef.width, r_refdef.height);
1362 r_showtrispass = false;
1363 else if (r_showtris.value > 0)
1366 GL_BlendFunc(GL_ONE, GL_ONE);
1367 GL_DepthTest(GL_FALSE);
1368 GL_DepthMask(GL_FALSE);
1369 memset(&m, 0, sizeof(m));
1371 r_showtrispass = true;
1372 GL_ShowTrisColor(0.2,0.2,0.2,1);
1376 if (gl_delayfinish.integer)
1378 // tell driver to commit it's partially full geometry queue to the rendering queue
1379 // (this doesn't wait for the commands themselves to complete)
1385 R_TimeReport("meshfinish");
1387 R_TimeReport("finish");
1392 //===========================================================================
1393 // dynamic vertex array buffer subsystem
1394 //===========================================================================
1396 float varray_vertex3f[65536*3];
1397 float varray_color4f[65536*4];
1398 float varray_texcoord2f[4][65536*2];
1399 float varray_texcoord3f[4][65536*3];
1400 float varray_normal3f[65536*3];
1401 int earray_element3i[65536];
1403 //===========================================================================
1404 // vertex array caching subsystem
1405 //===========================================================================
1407 typedef struct rcachearraylink_s
1409 struct rcachearraylink_s *next, *prev;
1410 struct rcachearrayitem_s *data;
1414 typedef struct rcachearrayitem_s
1416 // the original request structure
1417 rcachearrayrequest_t request;
1420 // offset into r_mesh_rcachedata
1422 // for linking this into the sequential list
1423 rcachearraylink_t sequentiallink;
1424 // for linking this into the lookup list
1425 rcachearraylink_t hashlink;
1429 #define RCACHEARRAY_HASHSIZE 65536
1430 #define RCACHEARRAY_ITEMS 4096
1431 #define RCACHEARRAY_DEFAULTSIZE (4 << 20)
1433 // all active items are linked into this chain in sorted order
1434 static rcachearraylink_t r_mesh_rcachesequentialchain;
1435 // all inactive items are linked into this chain in unknown order
1436 static rcachearraylink_t r_mesh_rcachefreechain;
1437 // all active items are also linked into these chains (using their hashlink)
1438 static rcachearraylink_t r_mesh_rcachechain[RCACHEARRAY_HASHSIZE];
1440 // all items are stored here, whether active or inactive
1441 static rcachearrayitem_t r_mesh_rcacheitems[RCACHEARRAY_ITEMS];
1443 // size of data buffer
1444 static int r_mesh_rcachedata_size = RCACHEARRAY_DEFAULTSIZE;
1446 static qbyte r_mesh_rcachedata[RCACHEARRAY_DEFAULTSIZE];
1449 static int r_mesh_rcachedata_offset;
1450 static rcachearraylink_t *r_mesh_rcachesequentialchain_current;
1452 static void R_Mesh_CacheArray_Startup(void)
1455 rcachearraylink_t *l;
1456 // prepare all the linked lists
1457 l = &r_mesh_rcachesequentialchain;l->next = l->prev = l;l->data = NULL;
1458 l = &r_mesh_rcachefreechain;l->next = l->prev = l;l->data = NULL;
1459 memset(&r_mesh_rcachechain, 0, sizeof(r_mesh_rcachechain));
1460 for (i = 0;i < RCACHEARRAY_HASHSIZE;i++)
1462 l = &r_mesh_rcachechain[i];
1463 l->next = l->prev = l;
1466 memset(&r_mesh_rcacheitems, 0, sizeof(r_mesh_rcacheitems));
1467 for (i = 0;i < RCACHEARRAY_ITEMS;i++)
1469 r_mesh_rcacheitems[i].hashlink.data = r_mesh_rcacheitems[i].sequentiallink.data = &r_mesh_rcacheitems[i];
1470 l = &r_mesh_rcacheitems[i].sequentiallink;
1471 l->next = &r_mesh_rcachefreechain;
1472 l->prev = l->next->prev;
1473 l->next->prev = l->prev->next = l;
1475 // clear other state
1476 r_mesh_rcachedata_offset = 0;
1477 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1480 static void R_Mesh_CacheArray_Shutdown(void)
1485 static void R_Mesh_CacheArray_ValidateState(int num)
1487 rcachearraylink_t *l, *lhead;
1488 lhead = &r_mesh_rcachesequentialchain;
1489 if (r_mesh_rcachesequentialchain_current == lhead)
1491 for (l = lhead->next;l != lhead;l = l->next)
1492 if (r_mesh_rcachesequentialchain_current == l)
1494 Sys_Error("%i", num);
1498 int R_Mesh_CacheArray(rcachearrayrequest_t *r)
1500 rcachearraylink_t *l, *lhead, *lnext;
1501 rcachearrayitem_t *d;
1502 int hashindex, offset, offsetend;
1504 //R_Mesh_CacheArray_ValidateState(3);
1505 // calculate a hashindex to choose a cache chain
1507 hashindex = CRC_Block((void *)r, sizeof(*r)) % RCACHEARRAY_HASHSIZE;
1509 // is it already cached?
1510 for (lhead = &r_mesh_rcachechain[hashindex], l = lhead->next;l != lhead;l = l->next)
1512 if (!memcmp(&l->data->request, r, sizeof(l->data->request)))
1514 // we have it cached already
1515 r->data = r_mesh_rcachedata + l->data->offset;
1520 // we need to add a new cache item, this means finding a place for the new
1521 // data and making sure we have a free item available, lots of work...
1523 // check if buffer needs to wrap
1524 if (r_mesh_rcachedata_offset + r->data_size > r_mesh_rcachedata_size)
1527 if (r->data_size * 10 > r_mesh_rcachedata_size)
1529 // realloc whole cache
1532 // reset back to start
1533 r_mesh_rcachedata_offset = 0;
1534 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1536 offset = r_mesh_rcachedata_offset;
1537 r_mesh_rcachedata_offset += r->data_size;
1538 offsetend = r_mesh_rcachedata_offset;
1539 //R_Mesh_CacheArray_ValidateState(4);
1544 for (lhead = &r_mesh_rcachesequentialchain, l = lhead->next, n = 0;l != lhead;l = l->next, n++);
1545 Con_Printf("R_Mesh_CacheArray: new data range %i:%i, %i items are already linked\n", offset, offsetend, n);
1549 // make room for the new data (remove old items)
1550 lhead = &r_mesh_rcachesequentialchain;
1551 l = r_mesh_rcachesequentialchain_current;
1554 while (l != lhead && l->data->offset < offsetend && l->data->offset + l->data->request.data_size > offset)
1556 //r_mesh_rcachesequentialchain_current = l;
1557 //R_Mesh_CacheArray_ValidateState(8);
1559 // if at the end of the chain, wrap around
1561 lnext = lnext->next;
1562 //r_mesh_rcachesequentialchain_current = lnext;
1563 //R_Mesh_CacheArray_ValidateState(10);
1565 // unlink from sequential chain
1566 l->next->prev = l->prev;
1567 l->prev->next = l->next;
1568 //R_Mesh_CacheArray_ValidateState(11);
1569 // link into free chain
1570 l->next = &r_mesh_rcachefreechain;
1571 l->prev = l->next->prev;
1572 l->next->prev = l->prev->next = l;
1573 //R_Mesh_CacheArray_ValidateState(12);
1575 l = &l->data->hashlink;
1576 // unlink from hash chain
1577 l->next->prev = l->prev;
1578 l->prev->next = l->next;
1581 //r_mesh_rcachesequentialchain_current = l;
1582 //R_Mesh_CacheArray_ValidateState(9);
1584 //r_mesh_rcachesequentialchain_current = l;
1585 //R_Mesh_CacheArray_ValidateState(5);
1586 // gobble an extra item if we have no free items available
1587 if (r_mesh_rcachefreechain.next == &r_mesh_rcachefreechain)
1591 // unlink from sequential chain
1592 l->next->prev = l->prev;
1593 l->prev->next = l->next;
1594 // link into free chain
1595 l->next = &r_mesh_rcachefreechain;
1596 l->prev = l->next->prev;
1597 l->next->prev = l->prev->next = l;
1599 l = &l->data->hashlink;
1600 // unlink from hash chain
1601 l->next->prev = l->prev;
1602 l->prev->next = l->next;
1606 r_mesh_rcachesequentialchain_current = l;
1607 //R_Mesh_CacheArray_ValidateState(6);
1609 // now take an item from the free chain
1610 l = r_mesh_rcachefreechain.next;
1616 l->next->prev = l->prev;
1617 l->prev->next = l->next;
1618 // relink to sequential
1619 l->next = r_mesh_rcachesequentialchain_current->prev;
1620 l->prev = l->next->prev;
1621 while (l->next->data && l->data && l->next->data->offset <= d->offset)
1624 l->next = l->next->next;
1625 l->prev = l->prev->next;
1627 while (l->prev->data && l->data && l->prev->data->offset >= d->offset)
1630 l->prev = l->prev->prev;
1631 l->next = l->next->prev;
1633 l->next->prev = l->prev->next = l;
1634 // also link into hash chain
1635 l = &l->data->hashlink;
1636 l->next = &r_mesh_rcachechain[hashindex];
1637 l->prev = l->next->prev;
1639 l->next->prev = l->prev->next = l;
1642 //r_mesh_rcachesequentialchain_current = d->sequentiallink.next;
1644 //R_Mesh_CacheArray_ValidateState(7);
1645 // and finally set the data pointer
1646 r->data = r_mesh_rcachedata + d->offset;
1647 // and tell the caller to fill the array