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;
79 static matrix4x4_t backend_viewmatrix;
80 static matrix4x4_t backend_modelmatrix;
81 static matrix4x4_t backend_modelviewmatrix;
82 static matrix4x4_t backend_glmodelviewmatrix;
83 static matrix4x4_t backend_projectmatrix;
85 static int backendunits, backendactive;
86 static mempool_t *gl_backend_mempool;
89 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 int polygonelements[768];
107 static void R_Mesh_CacheArray_Startup(void);
108 static void R_Mesh_CacheArray_Shutdown(void);
109 void GL_Backend_AllocArrays(void)
111 if (!gl_backend_mempool)
112 gl_backend_mempool = Mem_AllocPool("GL_Backend");
113 R_Mesh_CacheArray_Startup();
116 void GL_Backend_FreeArrays(void)
118 R_Mesh_CacheArray_Shutdown();
119 Mem_FreePool(&gl_backend_mempool);
122 static void gl_backend_start(void)
124 Con_DPrintf("OpenGL Backend started\n");
125 if (qglDrawRangeElements != NULL)
128 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
130 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
132 Con_DPrintf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
135 backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
137 GL_Backend_AllocArrays();
139 backendactive = true;
142 static void gl_backend_shutdown(void)
145 backendactive = false;
147 Con_DPrintf("OpenGL Backend shutting down\n");
149 GL_Backend_FreeArrays();
152 static void gl_backend_newmap(void)
156 void gl_backend_init(void)
160 for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
162 polygonelements[i * 3 + 0] = 0;
163 polygonelements[i * 3 + 1] = i + 1;
164 polygonelements[i * 3 + 2] = i + 2;
167 Cvar_RegisterVariable(&r_render);
168 Cvar_RegisterVariable(&gl_dither);
169 Cvar_RegisterVariable(&gl_lockarrays);
170 Cvar_RegisterVariable(&gl_delayfinish);
171 Cvar_RegisterVariable(&gl_paranoid);
172 Cvar_RegisterVariable(&gl_printcheckerror);
174 Cvar_SetValue("r_render", 0);
177 Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
178 Cvar_RegisterVariable(&gl_mesh_testarrayelement);
179 Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
180 R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
183 void GL_SetupView_ViewPort (int x, int y, int width, int height)
185 if (!r_render.integer)
188 // y is weird beause OpenGL is bottom to top, we use top to bottom
189 qglViewport(x, vid.realheight - (y + height), width, height);
193 void GL_SetupView_Orientation_Identity (void)
195 Matrix4x4_CreateIdentity(&backend_viewmatrix);
196 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
199 void GL_SetupView_Orientation_FromEntity (vec3_t origin, vec3_t angles)
201 Matrix4x4_CreateRotate(&backend_viewmatrix, -90, 1, 0, 0);
202 Matrix4x4_ConcatRotate(&backend_viewmatrix, 90, 0, 0, 1);
203 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
204 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
205 Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
206 Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
207 memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
210 void GL_SetupView_Mode_Perspective (double fovx, double fovy, double zNear, double zFar)
214 if (!r_render.integer)
218 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
219 qglLoadIdentity();CHECKGLERROR
221 xmax = zNear * tan(fovx * M_PI / 360.0);
222 ymax = zNear * tan(fovy * M_PI / 360.0);
224 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
225 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
226 GL_SetupView_Orientation_Identity();
229 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
233 if (!r_render.integer)
237 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
238 qglLoadIdentity();CHECKGLERROR
240 nudge = 1.0 - 1.0 / (1<<23);
241 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
246 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
255 m[14] = -2 * zNear * nudge;
258 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
259 GL_SetupView_Orientation_Identity();
260 backend_projectmatrix.m[0][0] = m[0];
261 backend_projectmatrix.m[1][0] = m[1];
262 backend_projectmatrix.m[2][0] = m[2];
263 backend_projectmatrix.m[3][0] = m[3];
264 backend_projectmatrix.m[0][1] = m[4];
265 backend_projectmatrix.m[1][1] = m[5];
266 backend_projectmatrix.m[2][1] = m[6];
267 backend_projectmatrix.m[3][1] = m[7];
268 backend_projectmatrix.m[0][2] = m[8];
269 backend_projectmatrix.m[1][2] = m[9];
270 backend_projectmatrix.m[2][2] = m[10];
271 backend_projectmatrix.m[3][2] = m[11];
272 backend_projectmatrix.m[0][3] = m[12];
273 backend_projectmatrix.m[1][3] = m[13];
274 backend_projectmatrix.m[2][3] = m[14];
275 backend_projectmatrix.m[3][3] = m[15];
278 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
280 if (!r_render.integer)
284 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
285 qglLoadIdentity();CHECKGLERROR
286 qglOrtho(x1, x2, y2, y1, zNear, zFar);
287 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
288 GL_SetupView_Orientation_Identity();
291 typedef struct gltextureunit_s
293 int t1d, t2d, t3d, tcubemap;
296 const void *pointer_texcoord;
297 float rgbscale, alphascale;
298 int combinergb, combinealpha;
299 // FIXME: add more combine stuff
313 gltextureunit_t units[MAX_TEXTUREUNITS];
317 const void *pointer_vertex;
318 const void *pointer_color;
322 void GL_SetupTextureState(void)
325 gltextureunit_t *unit;
327 gl_state.clientunit = -1;
328 for (i = 0;i < backendunits;i++)
331 GL_ClientActiveTexture(i);
332 unit = gl_state.units + i;
337 unit->pointer_texcoord = NULL;
339 unit->alphascale = 1;
340 unit->combinergb = GL_MODULATE;
341 unit->combinealpha = GL_MODULATE;
343 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
344 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
346 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
347 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
350 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
352 if (gl_texturecubemap)
354 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
356 if (gl_combine.integer)
358 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
359 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
360 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
361 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
362 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
363 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
364 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
365 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
366 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
367 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
368 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
369 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
370 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
371 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
372 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
373 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
374 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
378 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
383 void GL_Backend_ResetState(void)
385 memset(&gl_state, 0, sizeof(gl_state));
386 gl_state.depthtest = true;
387 gl_state.blendfunc1 = GL_ONE;
388 gl_state.blendfunc2 = GL_ZERO;
389 gl_state.blend = false;
390 gl_state.depthmask = GL_TRUE;
391 gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
392 gl_state.lockrange_first = 0;
393 gl_state.lockrange_count = 0;
394 gl_state.pointer_vertex = NULL;
395 gl_state.pointer_color = NULL;
399 qglEnable(GL_CULL_FACE);CHECKGLERROR
400 qglCullFace(GL_FRONT);CHECKGLERROR
401 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
402 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
403 qglDisable(GL_BLEND);CHECKGLERROR
404 qglDepthMask(gl_state.depthmask);CHECKGLERROR
406 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
407 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
409 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
410 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
412 GL_Color(0, 0, 0, 0);
413 GL_Color(1, 1, 1, 1);
415 GL_SetupTextureState();
418 void GL_ActiveTexture(int num)
420 if (gl_state.unit != num)
423 if (qglActiveTexture)
425 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
431 void GL_ClientActiveTexture(int num)
433 if (gl_state.clientunit != num)
435 gl_state.clientunit = num;
436 if (qglActiveTexture)
438 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
444 void GL_BlendFunc(int blendfunc1, int blendfunc2)
446 if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
448 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
449 if (gl_state.blendfunc2 == GL_ZERO)
451 if (gl_state.blendfunc1 == GL_ONE)
456 qglDisable(GL_BLEND);CHECKGLERROR
464 qglEnable(GL_BLEND);CHECKGLERROR
473 qglEnable(GL_BLEND);CHECKGLERROR
479 void GL_DepthMask(int state)
481 if (gl_state.depthmask != state)
483 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
487 void GL_DepthTest(int state)
489 if (gl_state.depthtest != state)
491 gl_state.depthtest = state;
492 if (gl_state.depthtest)
494 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
498 qglDisable(GL_DEPTH_TEST);CHECKGLERROR
503 void GL_VertexPointer(const float *p)
505 if (gl_state.pointer_vertex != p)
507 gl_state.pointer_vertex = p;
509 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), gl_state.pointer_vertex);
514 void GL_ColorPointer(const float *p)
516 if (gl_state.pointer_color != p)
519 if (!gl_state.pointer_color)
521 qglEnableClientState(GL_COLOR_ARRAY);
526 qglDisableClientState(GL_COLOR_ARRAY);
529 gl_state.pointer_color = p;
530 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), gl_state.pointer_color);
535 void GL_Color(float cr, float cg, float cb, float ca)
537 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)
539 GL_ColorPointer(NULL);
540 gl_state.color4f[0] = cr;
541 gl_state.color4f[1] = cg;
542 gl_state.color4f[2] = cb;
543 gl_state.color4f[3] = ca;
545 qglColor4f(cr, cg, cb, ca);
550 void GL_LockArrays(int first, int count)
552 if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
554 if (gl_state.lockrange_count)
556 gl_state.lockrange_count = 0;
558 qglUnlockArraysEXT();
561 if (count && gl_supportslockarrays && gl_lockarrays.integer)
563 gl_state.lockrange_first = first;
564 gl_state.lockrange_count = count;
566 qglLockArraysEXT(first, count);
572 void GL_TransformToScreen(const vec4_t in, vec4_t out)
576 Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
577 Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
579 out[0] = r_refdef.x + (out[0] * iw + 1.0f) * r_refdef.width * 0.5f;
580 out[1] = r_refdef.y + (out[1] * iw + 1.0f) * r_refdef.height * 0.5f;
581 out[2] = out[2] * iw;
584 // called at beginning of frame
585 void R_Mesh_Start(void)
589 GL_Backend_ResetState();
592 int gl_backend_rebindtextures;
594 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
599 for (i = 0;i < count;i++)
600 *out++ = *in++ + offset;
603 memcpy(out, in, sizeof(*out) * count);
606 // renders triangles using vertices from the active arrays
607 int paranoidblah = 0;
608 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
610 int numelements = numtriangles * 3;
611 if (numverts == 0 || numtriangles == 0)
613 Con_Printf("R_Mesh_Draw(%d, %d, %08p);\n", numverts, numtriangles, elements);
617 c_meshelements += numelements;
619 if (r_render.integer)
621 if (gl_paranoid.integer)
625 if (!qglIsEnabled(GL_VERTEX_ARRAY))
626 Con_Printf("R_Mesh_Draw: vertex array not enabled\n");
627 for (j = 0, size = numverts * (int)sizeof(float[3]), p = gl_state.pointer_vertex;j < size;j += sizeof(int), p++)
629 if (gl_state.pointer_color)
631 if (!qglIsEnabled(GL_COLOR_ARRAY))
632 Con_Printf("R_Mesh_Draw: color array set but not enabled\n");
633 for (j = 0, size = numverts * (int)sizeof(float[4]), p = gl_state.pointer_color;j < size;j += sizeof(int), p++)
636 for (i = 0;i < backendunits;i++)
638 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)
640 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))
641 Con_Printf("R_Mesh_Draw: array enabled but no texture bound\n");
643 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
644 Con_Printf("R_Mesh_Draw: texcoord array set but not enabled\n");
645 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++)
649 for (i = 0;i < numtriangles * 3;i++)
651 if (elements[i] < 0 || elements[i] >= numverts)
653 Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range 0 - %i) in elements list\n", elements[i], numverts);
659 GL_LockArrays(0, numverts);
661 if (gl_mesh_testmanualfeeding.integer)
665 qglBegin(GL_TRIANGLES);
666 for (i = 0;i < numtriangles * 3;i++)
668 for (j = 0;j < backendunits;j++)
670 if (gl_state.units[j].pointer_texcoord)
672 if (backendunits > 1)
674 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
676 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
677 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
681 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
682 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
687 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
689 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
690 qglTexCoord3f(p[0], p[1], p[2]);
694 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
695 qglTexCoord2f(p[0], p[1]);
700 if (gl_state.pointer_color)
702 p = ((const GLfloat *)(gl_state.pointer_color)) + elements[i] * 4;
703 qglColor4f(p[0], p[1], p[2], p[3]);
705 p = ((const GLfloat *)(gl_state.pointer_vertex)) + elements[i] * 3;
706 qglVertex3f(p[0], p[1], p[2]);
711 else if (gl_mesh_testarrayelement.integer)
714 qglBegin(GL_TRIANGLES);
715 for (i = 0;i < numtriangles * 3;i++)
717 qglArrayElement(elements[i]);
722 else if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
724 qglDrawRangeElements(GL_TRIANGLES, 0, numverts, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
728 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
736 // restores backend state, used when done with 3D rendering
737 void R_Mesh_Finish(void)
745 for (i = backendunits - 1;i >= 0;i--)
747 if (qglActiveTexture)
748 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
749 if (qglClientActiveTexture)
750 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
751 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
752 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
753 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
756 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
758 if (gl_texturecubemap)
760 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
762 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
763 if (gl_combine.integer)
765 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
766 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
769 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
770 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
772 qglDisable(GL_BLEND);CHECKGLERROR
773 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
774 qglDepthMask(GL_TRUE);CHECKGLERROR
775 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
778 void R_Mesh_Matrix(const matrix4x4_t *matrix)
780 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
782 backend_modelmatrix = *matrix;
783 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
784 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
785 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
789 void R_Mesh_TextureMatrix(int unitnumber, const matrix4x4_t *matrix)
791 if (memcmp(&gl_state.units[unitnumber].matrix, matrix, sizeof(matrix4x4_t)))
793 matrix4x4_t tempmatrix;
794 gl_state.units[unitnumber].matrix = *matrix;
795 Matrix4x4_Transpose(&tempmatrix, &gl_state.units[unitnumber].matrix);
796 qglMatrixMode(GL_TEXTURE);
797 GL_ActiveTexture(unitnumber);
798 qglLoadMatrixf(&tempmatrix.m[0][0]);
799 qglMatrixMode(GL_MODELVIEW);
803 void R_Mesh_State_Texture(const rmeshstate_t *m)
805 int i, combinergb, combinealpha, scale, arrayis3d;
806 gltextureunit_t *unit;
810 if (gl_backend_rebindtextures)
812 gl_backend_rebindtextures = false;
813 GL_SetupTextureState();
816 for (i = 0, unit = gl_state.units;i < backendunits;i++, unit++)
818 if (unit->t1d != m->tex1d[i])
824 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
829 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
831 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
833 if (unit->t2d != m->tex[i])
839 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
844 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
846 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
848 if (unit->t3d != m->tex3d[i])
854 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
859 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
861 qglBindTexture(GL_TEXTURE_3D, (unit->t3d = m->tex3d[i]));CHECKGLERROR
863 if (unit->tcubemap != m->texcubemap[i])
866 if (m->texcubemap[i])
868 if (unit->tcubemap == 0)
869 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
874 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
876 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
878 combinergb = m->texcombinergb[i];
880 combinergb = GL_MODULATE;
881 if (unit->combinergb != combinergb)
884 unit->combinergb = combinergb;
885 if (gl_combine.integer)
887 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
891 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
894 combinealpha = m->texcombinealpha[i];
896 combinealpha = GL_MODULATE;
897 if (unit->combinealpha != combinealpha)
900 unit->combinealpha = combinealpha;
901 if (gl_combine.integer)
903 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
906 scale = max(m->texrgbscale[i], 1);
907 if (unit->rgbscale != scale)
910 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = scale));CHECKGLERROR
912 scale = max(m->texalphascale[i], 1);
913 if (unit->alphascale != scale)
916 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = scale));CHECKGLERROR
918 arrayis3d = unit->t3d || unit->tcubemap;
919 if (unit->pointer_texcoord != m->pointer_texcoord[i] || unit->arrayis3d != arrayis3d)
921 GL_ClientActiveTexture(i);
922 if (m->pointer_texcoord[i])
924 if (!unit->arrayenabled)
926 unit->arrayenabled = true;
927 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
932 if (unit->arrayenabled)
934 unit->arrayenabled = false;
935 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
938 unit->pointer_texcoord = m->pointer_texcoord[i];
939 unit->arrayis3d = arrayis3d;
941 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[3]), unit->pointer_texcoord);
943 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), unit->pointer_texcoord);
950 ==============================================================================
954 ==============================================================================
957 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height, qboolean jpeg)
963 if (!r_render.integer)
966 buffer = Mem_Alloc(tempmempool, width*height*3);
967 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
970 // LordHavoc: compensate for v_overbrightbits when using hardware gamma
971 if (v_hwgamma.integer)
973 for (i = 0;i < width * height * 3;i++)
975 j = buffer[i] << v_overbrightbits.integer;
976 buffer[i] = (qbyte) (bound(0, j, 255));
981 ret = JPEG_SaveImage_preflipped (filename, width, height, buffer);
983 ret = Image_WriteTGARGB_preflipped (filename, width, height, buffer);
989 //=============================================================================
991 void R_ClearScreen(void)
993 if (r_render.integer)
996 qglClearColor(0,0,0,0);CHECKGLERROR
997 qglClearDepth(1);CHECKGLERROR
1000 // LordHavoc: we use a stencil centered around 128 instead of 0,
1001 // to avoid clamping interfering with strange shadow volume
1003 qglClearStencil(128);CHECKGLERROR
1006 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));CHECKGLERROR
1007 // set dithering mode
1008 if (gl_dither.integer)
1010 qglEnable(GL_DITHER);CHECKGLERROR
1014 qglDisable(GL_DITHER);CHECKGLERROR
1023 This is called every frame, and can also be called explicitly to flush
1027 void SCR_UpdateScreen (void)
1029 if (gl_delayfinish.integer)
1033 R_TimeReport("finish");
1036 if (r_textureunits.integer > gl_textureunits)
1037 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
1038 if (r_textureunits.integer < 1)
1039 Cvar_SetValueQuick(&r_textureunits, 1);
1041 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
1042 Cvar_SetValueQuick(&gl_combine, 0);
1045 r_colorscale = 1.0f / (float) (1 << v_overbrightbits.integer);
1048 r_lightmapscalebit = v_overbrightbits.integer;
1049 if (gl_combine.integer && r_textureunits.integer > 1)
1050 r_lightmapscalebit += 2;
1052 R_TimeReport("setup");
1056 R_TimeReport("clear");
1058 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
1064 if (gl_delayfinish.integer)
1066 // tell driver to commit it's partially full geometry queue to the rendering queue
1067 // (this doesn't wait for the commands themselves to complete)
1074 R_TimeReport("finish");
1079 //===========================================================================
1080 // dynamic vertex array buffer subsystem
1081 //===========================================================================
1083 float varray_vertex3f[65536*3];
1084 float varray_color4f[65536*4];
1085 float varray_texcoord2f[4][65536*2];
1086 float varray_texcoord3f[4][65536*3];
1087 float varray_normal3f[65536*3];
1089 //===========================================================================
1090 // vertex array caching subsystem
1091 //===========================================================================
1093 typedef struct rcachearraylink_s
1095 struct rcachearraylink_s *next, *prev;
1096 struct rcachearrayitem_s *data;
1100 typedef struct rcachearrayitem_s
1102 // the original request structure
1103 rcachearrayrequest_t request;
1106 // offset into r_mesh_rcachedata
1108 // for linking this into the sequential list
1109 rcachearraylink_t sequentiallink;
1110 // for linking this into the lookup list
1111 rcachearraylink_t hashlink;
1115 #define RCACHEARRAY_HASHSIZE 65536
1116 #define RCACHEARRAY_ITEMS 4096
1117 #define RCACHEARRAY_DEFAULTSIZE (4 << 20)
1119 // all active items are linked into this chain in sorted order
1120 static rcachearraylink_t r_mesh_rcachesequentialchain;
1121 // all inactive items are linked into this chain in unknown order
1122 static rcachearraylink_t r_mesh_rcachefreechain;
1123 // all active items are also linked into these chains (using their hashlink)
1124 static rcachearraylink_t r_mesh_rcachechain[RCACHEARRAY_HASHSIZE];
1126 // all items are stored here, whether active or inactive
1127 static rcachearrayitem_t r_mesh_rcacheitems[RCACHEARRAY_ITEMS];
1129 // size of data buffer
1130 static int r_mesh_rcachedata_size = RCACHEARRAY_DEFAULTSIZE;
1132 static qbyte r_mesh_rcachedata[RCACHEARRAY_DEFAULTSIZE];
1135 static int r_mesh_rcachedata_offset;
1136 static rcachearraylink_t *r_mesh_rcachesequentialchain_current;
1138 static void R_Mesh_CacheArray_Startup(void)
1141 rcachearraylink_t *l;
1142 // prepare all the linked lists
1143 l = &r_mesh_rcachesequentialchain;l->next = l->prev = l;l->data = NULL;
1144 l = &r_mesh_rcachefreechain;l->next = l->prev = l;l->data = NULL;
1145 memset(&r_mesh_rcachechain, 0, sizeof(r_mesh_rcachechain));
1146 for (i = 0;i < RCACHEARRAY_HASHSIZE;i++)
1148 l = &r_mesh_rcachechain[i];
1149 l->next = l->prev = l;
1152 memset(&r_mesh_rcacheitems, 0, sizeof(r_mesh_rcacheitems));
1153 for (i = 0;i < RCACHEARRAY_ITEMS;i++)
1155 r_mesh_rcacheitems[i].hashlink.data = r_mesh_rcacheitems[i].sequentiallink.data = &r_mesh_rcacheitems[i];
1156 l = &r_mesh_rcacheitems[i].sequentiallink;
1157 l->next = &r_mesh_rcachefreechain;
1158 l->prev = l->next->prev;
1159 l->next->prev = l->prev->next = l;
1161 // clear other state
1162 r_mesh_rcachedata_offset = 0;
1163 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1166 static void R_Mesh_CacheArray_Shutdown(void)
1171 static void R_Mesh_CacheArray_ValidateState(int num)
1173 rcachearraylink_t *l, *lhead;
1174 lhead = &r_mesh_rcachesequentialchain;
1175 if (r_mesh_rcachesequentialchain_current == lhead)
1177 for (l = lhead->next;l != lhead;l = l->next)
1178 if (r_mesh_rcachesequentialchain_current == l)
1180 Sys_Error("%i", num);
1184 int R_Mesh_CacheArray(rcachearrayrequest_t *r)
1186 rcachearraylink_t *l, *lhead, *lnext;
1187 rcachearrayitem_t *d;
1188 int hashindex, offset, offsetend;
1190 //R_Mesh_CacheArray_ValidateState(3);
1191 // calculate a hashindex to choose a cache chain
1193 hashindex = CRC_Block((void *)r, sizeof(*r)) % RCACHEARRAY_HASHSIZE;
1195 // is it already cached?
1196 for (lhead = &r_mesh_rcachechain[hashindex], l = lhead->next;l != lhead;l = l->next)
1198 if (!memcmp(&l->data->request, r, sizeof(l->data->request)))
1200 // we have it cached already
1201 r->data = r_mesh_rcachedata + l->data->offset;
1206 // we need to add a new cache item, this means finding a place for the new
1207 // data and making sure we have a free item available, lots of work...
1209 // check if buffer needs to wrap
1210 if (r_mesh_rcachedata_offset + r->data_size > r_mesh_rcachedata_size)
1213 if (r->data_size * 10 > r_mesh_rcachedata_size)
1215 // realloc whole cache
1218 // reset back to start
1219 r_mesh_rcachedata_offset = 0;
1220 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1222 offset = r_mesh_rcachedata_offset;
1223 r_mesh_rcachedata_offset += r->data_size;
1224 offsetend = r_mesh_rcachedata_offset;
1225 //R_Mesh_CacheArray_ValidateState(4);
1230 for (lhead = &r_mesh_rcachesequentialchain, l = lhead->next, n = 0;l != lhead;l = l->next, n++);
1231 Con_Printf("R_Mesh_CacheArray: new data range %i:%i, %i items are already linked\n", offset, offsetend, n);
1235 // make room for the new data (remove old items)
1236 lhead = &r_mesh_rcachesequentialchain;
1237 l = r_mesh_rcachesequentialchain_current;
1240 while (l != lhead && l->data->offset < offsetend && l->data->offset + l->data->request.data_size > offset)
1242 //r_mesh_rcachesequentialchain_current = l;
1243 //R_Mesh_CacheArray_ValidateState(8);
1245 // if at the end of the chain, wrap around
1247 lnext = lnext->next;
1248 //r_mesh_rcachesequentialchain_current = lnext;
1249 //R_Mesh_CacheArray_ValidateState(10);
1251 // unlink from sequential chain
1252 l->next->prev = l->prev;
1253 l->prev->next = l->next;
1254 //R_Mesh_CacheArray_ValidateState(11);
1255 // link into free chain
1256 l->next = &r_mesh_rcachefreechain;
1257 l->prev = l->next->prev;
1258 l->next->prev = l->prev->next = l;
1259 //R_Mesh_CacheArray_ValidateState(12);
1261 l = &l->data->hashlink;
1262 // unlink from hash chain
1263 l->next->prev = l->prev;
1264 l->prev->next = l->next;
1267 //r_mesh_rcachesequentialchain_current = l;
1268 //R_Mesh_CacheArray_ValidateState(9);
1270 //r_mesh_rcachesequentialchain_current = l;
1271 //R_Mesh_CacheArray_ValidateState(5);
1272 // gobble an extra item if we have no free items available
1273 if (r_mesh_rcachefreechain.next == &r_mesh_rcachefreechain)
1277 // unlink from sequential chain
1278 l->next->prev = l->prev;
1279 l->prev->next = l->next;
1280 // link into free chain
1281 l->next = &r_mesh_rcachefreechain;
1282 l->prev = l->next->prev;
1283 l->next->prev = l->prev->next = l;
1285 l = &l->data->hashlink;
1286 // unlink from hash chain
1287 l->next->prev = l->prev;
1288 l->prev->next = l->next;
1292 r_mesh_rcachesequentialchain_current = l;
1293 //R_Mesh_CacheArray_ValidateState(6);
1295 // now take an item from the free chain
1296 l = r_mesh_rcachefreechain.next;
1302 l->next->prev = l->prev;
1303 l->prev->next = l->next;
1304 // relink to sequential
1305 l->next = r_mesh_rcachesequentialchain_current->prev;
1306 l->prev = l->next->prev;
1307 while (l->next->data && l->data && l->next->data->offset <= d->offset)
1309 //Con_Printf(">\n");
1310 l->next = l->next->next;
1311 l->prev = l->prev->next;
1313 while (l->prev->data && l->data && l->prev->data->offset >= d->offset)
1315 //Con_Printf("<\n");
1316 l->prev = l->prev->prev;
1317 l->next = l->next->prev;
1319 l->next->prev = l->prev->next = l;
1320 // also link into hash chain
1321 l = &l->data->hashlink;
1322 l->next = &r_mesh_rcachechain[hashindex];
1323 l->prev = l->next->prev;
1325 l->next->prev = l->prev->next = l;
1328 //r_mesh_rcachesequentialchain_current = d->sequentiallink.next;
1330 //R_Mesh_CacheArray_ValidateState(7);
1331 // and finally set the data pointer
1332 r->data = r_mesh_rcachedata + d->offset;
1333 // and tell the caller to fill the array