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_DPrintf("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_DPrintf("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)
252 if (!r_render.integer)
256 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
257 qglLoadIdentity();CHECKGLERROR
259 xmax = zNear * tan(fovx * M_PI / 360.0);
260 ymax = zNear * tan(fovy * M_PI / 360.0);
262 qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
263 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
264 GL_SetupView_Orientation_Identity();
267 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double fovx, double fovy, double zNear)
271 if (!r_render.integer)
275 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
276 qglLoadIdentity();CHECKGLERROR
278 nudge = 1.0 - 1.0 / (1<<23);
279 m[ 0] = 1.0 / tan(fovx * M_PI / 360.0);
284 m[ 5] = 1.0 / tan(fovy * M_PI / 360.0);
293 m[14] = -2 * zNear * nudge;
296 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
297 GL_SetupView_Orientation_Identity();
298 backend_projectmatrix.m[0][0] = m[0];
299 backend_projectmatrix.m[1][0] = m[1];
300 backend_projectmatrix.m[2][0] = m[2];
301 backend_projectmatrix.m[3][0] = m[3];
302 backend_projectmatrix.m[0][1] = m[4];
303 backend_projectmatrix.m[1][1] = m[5];
304 backend_projectmatrix.m[2][1] = m[6];
305 backend_projectmatrix.m[3][1] = m[7];
306 backend_projectmatrix.m[0][2] = m[8];
307 backend_projectmatrix.m[1][2] = m[9];
308 backend_projectmatrix.m[2][2] = m[10];
309 backend_projectmatrix.m[3][2] = m[11];
310 backend_projectmatrix.m[0][3] = m[12];
311 backend_projectmatrix.m[1][3] = m[13];
312 backend_projectmatrix.m[2][3] = m[14];
313 backend_projectmatrix.m[3][3] = m[15];
316 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
318 if (!r_render.integer)
322 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
323 qglLoadIdentity();CHECKGLERROR
324 qglOrtho(x1, x2, y2, y1, zNear, zFar);
325 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
326 GL_SetupView_Orientation_Identity();
329 typedef struct gltextureunit_s
331 int t1d, t2d, t3d, tcubemap;
334 const void *pointer_texcoord;
335 float rgbscale, alphascale;
336 int combinergb, combinealpha;
337 // FIXME: add more combine stuff
352 gltextureunit_t units[MAX_TEXTUREUNITS];
356 const void *pointer_vertex;
357 const void *pointer_color;
361 void GL_SetupTextureState(void)
364 gltextureunit_t *unit;
366 gl_state.clientunit = -1;
367 for (i = 0;i < backendunits;i++)
370 GL_ClientActiveTexture(i);
371 unit = gl_state.units + i;
376 unit->pointer_texcoord = NULL;
378 unit->alphascale = 1;
379 unit->combinergb = GL_MODULATE;
380 unit->combinealpha = GL_MODULATE;
382 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
383 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
385 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
386 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
389 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
391 if (gl_texturecubemap)
393 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
395 if (gl_combine.integer)
397 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
398 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
399 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
400 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
401 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
402 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
403 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
404 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
405 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
406 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
407 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
408 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
409 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
410 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
411 qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
412 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
413 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
417 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
422 void GL_Backend_ResetState(void)
424 memset(&gl_state, 0, sizeof(gl_state));
425 gl_state.depthtest = true;
426 gl_state.blendfunc1 = GL_ONE;
427 gl_state.blendfunc2 = GL_ZERO;
428 gl_state.blend = false;
429 gl_state.depthmask = GL_TRUE;
430 gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
431 gl_state.lockrange_first = 0;
432 gl_state.lockrange_count = 0;
433 gl_state.pointer_vertex = NULL;
434 gl_state.pointer_color = NULL;
438 qglEnable(GL_CULL_FACE);CHECKGLERROR
439 qglCullFace(GL_FRONT);CHECKGLERROR
440 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
441 qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
442 qglDisable(GL_BLEND);CHECKGLERROR
443 qglDepthMask(gl_state.depthmask);CHECKGLERROR
445 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
446 qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
448 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
449 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
451 GL_Color(0, 0, 0, 0);
452 GL_Color(1, 1, 1, 1);
454 GL_SetupTextureState();
457 void GL_ActiveTexture(int num)
459 if (gl_state.unit != num)
462 if (qglActiveTexture)
464 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
470 void GL_ClientActiveTexture(int num)
472 if (gl_state.clientunit != num)
474 gl_state.clientunit = num;
475 if (qglActiveTexture)
477 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
483 void GL_BlendFunc(int blendfunc1, int blendfunc2)
485 if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
487 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
488 if (gl_state.blendfunc2 == GL_ZERO)
490 if (gl_state.blendfunc1 == GL_ONE)
495 qglDisable(GL_BLEND);CHECKGLERROR
503 qglEnable(GL_BLEND);CHECKGLERROR
512 qglEnable(GL_BLEND);CHECKGLERROR
518 void GL_DepthMask(int state)
520 if (gl_state.depthmask != state)
522 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
526 void GL_DepthTest(int state)
528 if (gl_state.depthtest != state)
530 gl_state.depthtest = state;
531 if (gl_state.depthtest)
533 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
537 qglDisable(GL_DEPTH_TEST);CHECKGLERROR
542 void GL_VertexPointer(const float *p)
544 if (gl_state.pointer_vertex != p)
546 gl_state.pointer_vertex = p;
548 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), gl_state.pointer_vertex);
553 void GL_ColorPointer(const float *p)
555 if (gl_state.pointer_color != p)
558 if (!gl_state.pointer_color)
560 qglEnableClientState(GL_COLOR_ARRAY);
565 qglDisableClientState(GL_COLOR_ARRAY);
568 gl_state.pointer_color = p;
569 qglColorPointer(4, GL_FLOAT, sizeof(float[4]), gl_state.pointer_color);
574 void GL_Color(float cr, float cg, float cb, float ca)
576 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)
578 GL_ColorPointer(NULL);
579 gl_state.color4f[0] = cr;
580 gl_state.color4f[1] = cg;
581 gl_state.color4f[2] = cb;
582 gl_state.color4f[3] = ca;
584 qglColor4f(cr, cg, cb, ca);
589 void GL_LockArrays(int first, int count)
591 if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
593 if (gl_state.lockrange_count)
595 gl_state.lockrange_count = 0;
597 qglUnlockArraysEXT();
600 if (count && gl_supportslockarrays && gl_lockarrays.integer)
602 gl_state.lockrange_first = first;
603 gl_state.lockrange_count = count;
605 qglLockArraysEXT(first, count);
611 void GL_Scissor (int x, int y, int width, int height)
614 qglScissor(x, vid.realheight - (y + height),width,height);
618 void GL_ScissorTest(int state)
620 if(gl_state.scissortest == state)
624 if((gl_state.scissortest = state))
625 qglEnable(GL_SCISSOR_TEST);
627 qglDisable(GL_SCISSOR_TEST);
631 void GL_TransformToScreen(const vec4_t in, vec4_t out)
635 Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
636 Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
638 out[0] = r_view_x + (out[0] * iw + 1.0f) * r_view_width * 0.5f;
639 out[1] = r_view_y + (out[1] * iw + 1.0f) * r_view_height * 0.5f;
640 out[2] = out[2] * iw;
643 // called at beginning of frame
644 void R_Mesh_Start(void)
648 GL_Backend_ResetState();
651 int gl_backend_rebindtextures;
653 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
658 for (i = 0;i < count;i++)
659 *out++ = *in++ + offset;
662 memcpy(out, in, sizeof(*out) * count);
665 // renders triangles using vertices from the active arrays
666 int paranoidblah = 0;
667 void R_Mesh_Draw(int numverts, int numtriangles, const int *elements)
669 int numelements = numtriangles * 3;
670 if (numverts == 0 || numtriangles == 0)
672 Con_Printf("R_Mesh_Draw(%d, %d, %08p);\n", numverts, numtriangles, elements);
676 c_meshelements += numelements;
678 if (r_render.integer)
680 if (gl_paranoid.integer)
684 if (!qglIsEnabled(GL_VERTEX_ARRAY))
685 Con_Printf("R_Mesh_Draw: vertex array not enabled\n");
686 for (j = 0, size = numverts * (int)sizeof(float[3]), p = gl_state.pointer_vertex;j < size;j += sizeof(int), p++)
688 if (gl_state.pointer_color)
690 if (!qglIsEnabled(GL_COLOR_ARRAY))
691 Con_Printf("R_Mesh_Draw: color array set but not enabled\n");
692 for (j = 0, size = numverts * (int)sizeof(float[4]), p = gl_state.pointer_color;j < size;j += sizeof(int), p++)
695 for (i = 0;i < backendunits;i++)
697 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)
699 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))
700 Con_Printf("R_Mesh_Draw: array enabled but no texture bound\n");
702 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
703 Con_Printf("R_Mesh_Draw: texcoord array set but not enabled\n");
704 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++)
708 for (i = 0;i < numtriangles * 3;i++)
710 if (elements[i] < 0 || elements[i] >= numverts)
712 Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range 0 - %i) in elements list\n", elements[i], numverts);
718 GL_LockArrays(0, numverts);
720 if (gl_mesh_testmanualfeeding.integer)
724 qglBegin(GL_TRIANGLES);
725 for (i = 0;i < numtriangles * 3;i++)
727 for (j = 0;j < backendunits;j++)
729 if (gl_state.units[j].pointer_texcoord)
731 if (backendunits > 1)
733 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
735 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
736 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
740 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
741 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
746 if (gl_state.units[j].t3d || gl_state.units[j].tcubemap)
748 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
749 qglTexCoord3f(p[0], p[1], p[2]);
753 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
754 qglTexCoord2f(p[0], p[1]);
759 if (gl_state.pointer_color)
761 p = ((const GLfloat *)(gl_state.pointer_color)) + elements[i] * 4;
762 qglColor4f(p[0], p[1], p[2], p[3]);
764 p = ((const GLfloat *)(gl_state.pointer_vertex)) + elements[i] * 3;
765 qglVertex3f(p[0], p[1], p[2]);
770 else if (gl_mesh_testarrayelement.integer)
773 qglBegin(GL_TRIANGLES);
774 for (i = 0;i < numtriangles * 3;i++)
776 qglArrayElement(elements[i]);
781 else if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
783 qglDrawRangeElements(GL_TRIANGLES, 0, numverts, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
787 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, elements);CHECKGLERROR
795 // restores backend state, used when done with 3D rendering
796 void R_Mesh_Finish(void)
804 for (i = backendunits - 1;i >= 0;i--)
806 if (qglActiveTexture)
807 qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
808 if (qglClientActiveTexture)
809 qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
810 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
811 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
812 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
815 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
817 if (gl_texturecubemap)
819 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
821 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
822 if (gl_combine.integer)
824 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
825 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
828 qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
829 qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
831 qglDisable(GL_BLEND);CHECKGLERROR
832 qglEnable(GL_DEPTH_TEST);CHECKGLERROR
833 qglDepthMask(GL_TRUE);CHECKGLERROR
834 qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
837 void R_Mesh_Matrix(const matrix4x4_t *matrix)
839 if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
841 backend_modelmatrix = *matrix;
842 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
843 Matrix4x4_Transpose(&backend_glmodelviewmatrix, &backend_modelviewmatrix);
844 qglLoadMatrixf(&backend_glmodelviewmatrix.m[0][0]);
848 void R_Mesh_TextureMatrix(int unitnumber, const matrix4x4_t *matrix)
850 if (memcmp(&gl_state.units[unitnumber].matrix, matrix, sizeof(matrix4x4_t)))
852 matrix4x4_t tempmatrix;
853 gl_state.units[unitnumber].matrix = *matrix;
854 Matrix4x4_Transpose(&tempmatrix, &gl_state.units[unitnumber].matrix);
855 qglMatrixMode(GL_TEXTURE);
856 GL_ActiveTexture(unitnumber);
857 qglLoadMatrixf(&tempmatrix.m[0][0]);
858 qglMatrixMode(GL_MODELVIEW);
862 void R_Mesh_State_Texture(const rmeshstate_t *m)
864 int i, combinergb, combinealpha, scale, arrayis3d;
865 gltextureunit_t *unit;
869 if (gl_backend_rebindtextures)
871 gl_backend_rebindtextures = false;
872 GL_SetupTextureState();
875 for (i = 0, unit = gl_state.units;i < backendunits;i++, unit++)
877 if (unit->t1d != m->tex1d[i])
883 qglEnable(GL_TEXTURE_1D);CHECKGLERROR
888 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
890 qglBindTexture(GL_TEXTURE_1D, (unit->t1d = m->tex1d[i]));CHECKGLERROR
892 if (unit->t2d != m->tex[i])
898 qglEnable(GL_TEXTURE_2D);CHECKGLERROR
903 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
905 qglBindTexture(GL_TEXTURE_2D, (unit->t2d = m->tex[i]));CHECKGLERROR
907 if (unit->t3d != m->tex3d[i])
913 qglEnable(GL_TEXTURE_3D);CHECKGLERROR
918 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
920 qglBindTexture(GL_TEXTURE_3D, (unit->t3d = m->tex3d[i]));CHECKGLERROR
922 if (unit->tcubemap != m->texcubemap[i])
925 if (m->texcubemap[i])
927 if (unit->tcubemap == 0)
928 qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
933 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
935 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, (unit->tcubemap = m->texcubemap[i]));CHECKGLERROR
937 combinergb = m->texcombinergb[i];
939 combinergb = GL_MODULATE;
940 if (unit->combinergb != combinergb)
943 unit->combinergb = combinergb;
944 if (gl_combine.integer)
946 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
950 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
953 combinealpha = m->texcombinealpha[i];
955 combinealpha = GL_MODULATE;
956 if (unit->combinealpha != combinealpha)
959 unit->combinealpha = combinealpha;
960 if (gl_combine.integer)
962 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
965 scale = max(m->texrgbscale[i], 1);
966 if (unit->rgbscale != scale)
969 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = scale));CHECKGLERROR
971 scale = max(m->texalphascale[i], 1);
972 if (unit->alphascale != scale)
975 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = scale));CHECKGLERROR
977 arrayis3d = unit->t3d || unit->tcubemap;
978 if (unit->pointer_texcoord != m->pointer_texcoord[i] || unit->arrayis3d != arrayis3d)
980 GL_ClientActiveTexture(i);
981 if (m->pointer_texcoord[i])
983 if (!unit->arrayenabled)
985 unit->arrayenabled = true;
986 qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
991 if (unit->arrayenabled)
993 unit->arrayenabled = false;
994 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
997 unit->pointer_texcoord = m->pointer_texcoord[i];
998 unit->arrayis3d = arrayis3d;
1000 qglTexCoordPointer(3, GL_FLOAT, sizeof(float[3]), unit->pointer_texcoord);
1002 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), unit->pointer_texcoord);
1008 void R_Mesh_Draw_ShowTris(int numverts, int numtriangles, int *elements)
1011 for (;numtriangles;numtriangles--, elements += 3)
1013 qglArrayElement(elements[0]);qglArrayElement(elements[1]);
1014 qglArrayElement(elements[1]);qglArrayElement(elements[2]);
1015 qglArrayElement(elements[2]);qglArrayElement(elements[0]);
1022 ==============================================================================
1026 ==============================================================================
1029 qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height, qboolean jpeg)
1034 if (!r_render.integer)
1037 buffer = Mem_Alloc(tempmempool, width*height*3);
1038 qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
1042 ret = JPEG_SaveImage_preflipped (filename, width, height, buffer);
1044 ret = Image_WriteTGARGB_preflipped (filename, width, height, buffer);
1050 //=============================================================================
1052 void R_ClearScreen(void)
1054 if (r_render.integer)
1057 qglClearColor(0,0,0,0);CHECKGLERROR
1058 qglClearDepth(1);CHECKGLERROR
1061 // LordHavoc: we use a stencil centered around 128 instead of 0,
1062 // to avoid clamping interfering with strange shadow volume
1064 qglClearStencil(128);CHECKGLERROR
1067 qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | (gl_stencil ? GL_STENCIL_BUFFER_BIT : 0));CHECKGLERROR
1068 // set dithering mode
1069 if (gl_dither.integer)
1071 qglEnable(GL_DITHER);CHECKGLERROR
1075 qglDisable(GL_DITHER);CHECKGLERROR
1081 ====================
1083 ====================
1085 float CalcFov (float fov_x, float width, float height)
1087 // calculate vision size and alter by aspect, then convert back to angle
1088 return atan (height / (width / tan(fov_x/360*M_PI))) * 360 / M_PI;
1095 This is called every frame, and can also be called explicitly to flush
1099 void SCR_UpdateScreen (void)
1101 if (gl_delayfinish.integer)
1105 R_TimeReport("finish");
1108 if (r_textureunits.integer > gl_textureunits)
1109 Cvar_SetValueQuick(&r_textureunits, gl_textureunits);
1110 if (r_textureunits.integer < 1)
1111 Cvar_SetValueQuick(&r_textureunits, 1);
1113 if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2))
1114 Cvar_SetValueQuick(&gl_combine, 0);
1116 R_TimeReport("setup");
1120 R_TimeReport("clear");
1122 if (scr_conlines < vid.conheight && cls.signon == SIGNONS)
1128 if (scr_viewsize.value < 30)
1129 Cvar_Set ("viewsize","30");
1130 if (scr_viewsize.value > 120)
1131 Cvar_Set ("viewsize","120");
1133 // bound field of view
1134 if (scr_fov.value < 1)
1135 Cvar_Set ("fov","1");
1136 if (scr_fov.value > 170)
1137 Cvar_Set ("fov","170");
1139 // intermission is always full screen
1140 if (cl.intermission)
1147 if (scr_viewsize.value >= 120)
1148 sb_lines = 0; // no status bar at all
1149 else if (scr_viewsize.value >= 110)
1150 sb_lines = 24; // no inventory
1153 size = scr_viewsize.value * (1.0 / 100.0);
1154 size = min(size, 1);
1157 r_refdef.width = vid.realwidth * size;
1158 r_refdef.height = vid.realheight * size;
1159 r_refdef.x = (vid.realwidth - r_refdef.width)/2;
1160 r_refdef.y = (vid.realheight - r_refdef.height)/2;
1162 // LordHavoc: viewzoom (zoom in for sniper rifles, etc)
1163 r_refdef.fov_x = scr_fov.value * cl.viewzoom;
1164 r_refdef.fov_y = CalcFov (r_refdef.fov_x, r_refdef.width, r_refdef.height);
1168 Mod_CheckLoaded(cl.worldmodel);
1169 contents = CL_PointSuperContents(r_vieworigin);
1170 if (contents & SUPERCONTENTS_LIQUIDSMASK)
1172 r_refdef.fov_x *= (sin(cl.time * 4.7) * 0.015 + 0.985);
1173 r_refdef.fov_y *= (sin(cl.time * 3.0) * 0.015 + 0.985);
1179 if (scr_zoomwindow.integer)
1181 float sizex = bound(10, scr_zoomwindow_viewsizex.value, 100) / 100.0;
1182 float sizey = bound(10, scr_zoomwindow_viewsizey.value, 100) / 100.0;
1183 r_refdef.width = vid.realwidth * sizex;
1184 r_refdef.height = vid.realheight * sizey;
1185 r_refdef.x = (vid.realwidth - r_refdef.width)/2;
1187 r_refdef.fov_x = scr_zoomwindow_fov.value;
1188 r_refdef.fov_y = CalcFov(r_refdef.fov_x, r_refdef.width, r_refdef.height);
1197 if (gl_delayfinish.integer)
1199 // tell driver to commit it's partially full geometry queue to the rendering queue
1200 // (this doesn't wait for the commands themselves to complete)
1207 R_TimeReport("finish");
1212 //===========================================================================
1213 // dynamic vertex array buffer subsystem
1214 //===========================================================================
1216 float varray_vertex3f[65536*3];
1217 float varray_color4f[65536*4];
1218 float varray_texcoord2f[4][65536*2];
1219 float varray_texcoord3f[4][65536*3];
1220 float varray_normal3f[65536*3];
1221 int earray_element3i[65536];
1223 //===========================================================================
1224 // vertex array caching subsystem
1225 //===========================================================================
1227 typedef struct rcachearraylink_s
1229 struct rcachearraylink_s *next, *prev;
1230 struct rcachearrayitem_s *data;
1234 typedef struct rcachearrayitem_s
1236 // the original request structure
1237 rcachearrayrequest_t request;
1240 // offset into r_mesh_rcachedata
1242 // for linking this into the sequential list
1243 rcachearraylink_t sequentiallink;
1244 // for linking this into the lookup list
1245 rcachearraylink_t hashlink;
1249 #define RCACHEARRAY_HASHSIZE 65536
1250 #define RCACHEARRAY_ITEMS 4096
1251 #define RCACHEARRAY_DEFAULTSIZE (4 << 20)
1253 // all active items are linked into this chain in sorted order
1254 static rcachearraylink_t r_mesh_rcachesequentialchain;
1255 // all inactive items are linked into this chain in unknown order
1256 static rcachearraylink_t r_mesh_rcachefreechain;
1257 // all active items are also linked into these chains (using their hashlink)
1258 static rcachearraylink_t r_mesh_rcachechain[RCACHEARRAY_HASHSIZE];
1260 // all items are stored here, whether active or inactive
1261 static rcachearrayitem_t r_mesh_rcacheitems[RCACHEARRAY_ITEMS];
1263 // size of data buffer
1264 static int r_mesh_rcachedata_size = RCACHEARRAY_DEFAULTSIZE;
1266 static qbyte r_mesh_rcachedata[RCACHEARRAY_DEFAULTSIZE];
1269 static int r_mesh_rcachedata_offset;
1270 static rcachearraylink_t *r_mesh_rcachesequentialchain_current;
1272 static void R_Mesh_CacheArray_Startup(void)
1275 rcachearraylink_t *l;
1276 // prepare all the linked lists
1277 l = &r_mesh_rcachesequentialchain;l->next = l->prev = l;l->data = NULL;
1278 l = &r_mesh_rcachefreechain;l->next = l->prev = l;l->data = NULL;
1279 memset(&r_mesh_rcachechain, 0, sizeof(r_mesh_rcachechain));
1280 for (i = 0;i < RCACHEARRAY_HASHSIZE;i++)
1282 l = &r_mesh_rcachechain[i];
1283 l->next = l->prev = l;
1286 memset(&r_mesh_rcacheitems, 0, sizeof(r_mesh_rcacheitems));
1287 for (i = 0;i < RCACHEARRAY_ITEMS;i++)
1289 r_mesh_rcacheitems[i].hashlink.data = r_mesh_rcacheitems[i].sequentiallink.data = &r_mesh_rcacheitems[i];
1290 l = &r_mesh_rcacheitems[i].sequentiallink;
1291 l->next = &r_mesh_rcachefreechain;
1292 l->prev = l->next->prev;
1293 l->next->prev = l->prev->next = l;
1295 // clear other state
1296 r_mesh_rcachedata_offset = 0;
1297 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1300 static void R_Mesh_CacheArray_Shutdown(void)
1305 static void R_Mesh_CacheArray_ValidateState(int num)
1307 rcachearraylink_t *l, *lhead;
1308 lhead = &r_mesh_rcachesequentialchain;
1309 if (r_mesh_rcachesequentialchain_current == lhead)
1311 for (l = lhead->next;l != lhead;l = l->next)
1312 if (r_mesh_rcachesequentialchain_current == l)
1314 Sys_Error("%i", num);
1318 int R_Mesh_CacheArray(rcachearrayrequest_t *r)
1320 rcachearraylink_t *l, *lhead, *lnext;
1321 rcachearrayitem_t *d;
1322 int hashindex, offset, offsetend;
1324 //R_Mesh_CacheArray_ValidateState(3);
1325 // calculate a hashindex to choose a cache chain
1327 hashindex = CRC_Block((void *)r, sizeof(*r)) % RCACHEARRAY_HASHSIZE;
1329 // is it already cached?
1330 for (lhead = &r_mesh_rcachechain[hashindex], l = lhead->next;l != lhead;l = l->next)
1332 if (!memcmp(&l->data->request, r, sizeof(l->data->request)))
1334 // we have it cached already
1335 r->data = r_mesh_rcachedata + l->data->offset;
1340 // we need to add a new cache item, this means finding a place for the new
1341 // data and making sure we have a free item available, lots of work...
1343 // check if buffer needs to wrap
1344 if (r_mesh_rcachedata_offset + r->data_size > r_mesh_rcachedata_size)
1347 if (r->data_size * 10 > r_mesh_rcachedata_size)
1349 // realloc whole cache
1352 // reset back to start
1353 r_mesh_rcachedata_offset = 0;
1354 r_mesh_rcachesequentialchain_current = &r_mesh_rcachesequentialchain;
1356 offset = r_mesh_rcachedata_offset;
1357 r_mesh_rcachedata_offset += r->data_size;
1358 offsetend = r_mesh_rcachedata_offset;
1359 //R_Mesh_CacheArray_ValidateState(4);
1364 for (lhead = &r_mesh_rcachesequentialchain, l = lhead->next, n = 0;l != lhead;l = l->next, n++);
1365 Con_Printf("R_Mesh_CacheArray: new data range %i:%i, %i items are already linked\n", offset, offsetend, n);
1369 // make room for the new data (remove old items)
1370 lhead = &r_mesh_rcachesequentialchain;
1371 l = r_mesh_rcachesequentialchain_current;
1374 while (l != lhead && l->data->offset < offsetend && l->data->offset + l->data->request.data_size > offset)
1376 //r_mesh_rcachesequentialchain_current = l;
1377 //R_Mesh_CacheArray_ValidateState(8);
1379 // if at the end of the chain, wrap around
1381 lnext = lnext->next;
1382 //r_mesh_rcachesequentialchain_current = lnext;
1383 //R_Mesh_CacheArray_ValidateState(10);
1385 // unlink from sequential chain
1386 l->next->prev = l->prev;
1387 l->prev->next = l->next;
1388 //R_Mesh_CacheArray_ValidateState(11);
1389 // link into free chain
1390 l->next = &r_mesh_rcachefreechain;
1391 l->prev = l->next->prev;
1392 l->next->prev = l->prev->next = l;
1393 //R_Mesh_CacheArray_ValidateState(12);
1395 l = &l->data->hashlink;
1396 // unlink from hash chain
1397 l->next->prev = l->prev;
1398 l->prev->next = l->next;
1401 //r_mesh_rcachesequentialchain_current = l;
1402 //R_Mesh_CacheArray_ValidateState(9);
1404 //r_mesh_rcachesequentialchain_current = l;
1405 //R_Mesh_CacheArray_ValidateState(5);
1406 // gobble an extra item if we have no free items available
1407 if (r_mesh_rcachefreechain.next == &r_mesh_rcachefreechain)
1411 // unlink from sequential chain
1412 l->next->prev = l->prev;
1413 l->prev->next = l->next;
1414 // link into free chain
1415 l->next = &r_mesh_rcachefreechain;
1416 l->prev = l->next->prev;
1417 l->next->prev = l->prev->next = l;
1419 l = &l->data->hashlink;
1420 // unlink from hash chain
1421 l->next->prev = l->prev;
1422 l->prev->next = l->next;
1426 r_mesh_rcachesequentialchain_current = l;
1427 //R_Mesh_CacheArray_ValidateState(6);
1429 // now take an item from the free chain
1430 l = r_mesh_rcachefreechain.next;
1436 l->next->prev = l->prev;
1437 l->prev->next = l->next;
1438 // relink to sequential
1439 l->next = r_mesh_rcachesequentialchain_current->prev;
1440 l->prev = l->next->prev;
1441 while (l->next->data && l->data && l->next->data->offset <= d->offset)
1443 //Con_Printf(">\n");
1444 l->next = l->next->next;
1445 l->prev = l->prev->next;
1447 while (l->prev->data && l->data && l->prev->data->offset >= d->offset)
1449 //Con_Printf("<\n");
1450 l->prev = l->prev->prev;
1451 l->next = l->next->prev;
1453 l->next->prev = l->prev->next = l;
1454 // also link into hash chain
1455 l = &l->data->hashlink;
1456 l->next = &r_mesh_rcachechain[hashindex];
1457 l->prev = l->next->prev;
1459 l->next->prev = l->prev->next = l;
1462 //r_mesh_rcachesequentialchain_current = d->sequentiallink.next;
1464 //R_Mesh_CacheArray_ValidateState(7);
1465 // and finally set the data pointer
1466 r->data = r_mesh_rcachedata + d->offset;
1467 // and tell the caller to fill the array