removed glClearColor because it was being reset in gl_screen anyway
[xonotic/darkplaces.git] / vid_3dfxsvga.c
1 /*
2         vid_3dfxsvga.c
3
4         OpenGL device driver for 3Dfx chipsets running Linux
5
6         Copyright (C) 1996-1997  Id Software, Inc.
7         Copyright (C) 1999,2000  Nelson Rush.
8         Copyright (C) 1999,2000  contributors of the QuakeForge project
9         Please see the file "AUTHORS" for a list of contributors
10
11         This program is free software; you can redistribute it and/or
12         modify it under the terms of the GNU General Public License
13         as published by the Free Software Foundation; either version 2
14         of the License, or (at your option) any later version.
15
16         This program is distributed in the hope that it will be useful,
17         but WITHOUT ANY WARRANTY; without even the implied warranty of
18         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19
20         See the GNU General Public License for more details.
21
22         You should have received a copy of the GNU General Public License
23         along with this program; if not, write to:
24
25                 Free Software Foundation, Inc.
26                 59 Temple Place - Suite 330
27                 Boston, MA  02111-1307, USA
28
29         $Id$
30 */
31
32 #include "quakedef.h"
33 #include "sys.h"
34 #include "console.h"
35 #include "sbar.h"
36
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <signal.h>
40 #include <string.h>
41
42 #include <dlfcn.h>
43
44 #include <GL/gl.h>
45 #include <GL/fxmesa.h>
46 #include <glide/sst1vid.h>
47
48 #define WARP_WIDTH              320
49 #define WARP_HEIGHT             200
50
51
52 //unsigned short        d_8to16table[256];
53 unsigned                d_8to24table[256];
54 unsigned char   d_15to8table[65536];
55
56 cvar_t          vid_mode = {"vid_mode","0",false};
57
58 viddef_t        vid;    // global video state
59
60 static void     *dlhand = NULL;
61
62 static fxMesaContext fc = NULL;
63 static int      scr_width, scr_height;
64
65 int     VID_options_items = 0;
66
67 /*-----------------------------------------------------------------------*/
68
69 //int   texture_mode = GL_NEAREST;
70 //int   texture_mode = GL_NEAREST_MIPMAP_NEAREST;
71 //int   texture_mode = GL_NEAREST_MIPMAP_LINEAR;
72 int     texture_mode = GL_LINEAR;
73 //int   texture_mode = GL_LINEAR_MIPMAP_NEAREST;
74 //int   texture_mode = GL_LINEAR_MIPMAP_LINEAR;
75
76 int     texture_extension_number = 1;
77
78 float           gldepthmin, gldepthmax;
79
80 const char *gl_vendor;
81 const char *gl_renderer;
82 const char *gl_version;
83 const char *gl_extensions;
84
85 void (*qglColorTableEXT) (int, int, int, int, int, const void*);
86 void (*qgl3DfxSetPaletteEXT) (GLuint *);
87 void (*qglMTexCoord2f) (GLenum, GLfloat, GLfloat);
88 void (*qglSelectTexture) (GLenum);
89
90 int gl_mtex_enum = 0;
91
92 // LordHavoc: in GLX these are never set, simply provided to make the rest of the code work
93 qboolean is8bit = false;
94 qboolean isPermedia = false;
95 qboolean isATI = false;
96 qboolean isG200 = false;
97 qboolean isRagePro = false;
98 qboolean gl_mtexable = false;
99 qboolean gl_arrays = false;
100
101 /*-----------------------------------------------------------------------*/
102 void D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
103 {
104 }
105
106 void D_EndDirectRect (int x, int y, int width, int height)
107 {
108 }
109
110 void VID_Shutdown(void)
111 {
112         if (!fc)
113                 return;
114
115         fxMesaDestroyContext(fc);
116 }
117
118 void signal_handler(int sig)
119 {
120         printf("Received signal %d, exiting...\n", sig);
121         Host_Shutdown();
122         abort();
123         //Sys_Quit();
124         exit(0);
125 }
126
127 void InitSig(void)
128 {
129         signal(SIGHUP, signal_handler);
130         signal(SIGINT, signal_handler);
131         signal(SIGQUIT, signal_handler);
132         signal(SIGILL, signal_handler);
133         signal(SIGTRAP, signal_handler);
134 //      signal(SIGIOT, signal_handler);
135         signal(SIGBUS, signal_handler);
136 //      signal(SIGFPE, signal_handler);
137         signal(SIGSEGV, signal_handler);
138         signal(SIGTERM, signal_handler);
139 }
140
141 /*
142         CheckMultiTextureExtensions
143
144         Check for ARB, SGIS, or EXT multitexture support
145 */
146 void
147 CheckMultiTextureExtensions ( void )
148 {
149         Con_Printf ("Checking for multitexture... ");
150         if (COM_CheckParm ("-nomtex"))
151         {
152                 Con_Printf ("disabled\n");
153                 return;
154         }
155         dlhand = dlopen (NULL, RTLD_LAZY);
156         if (dlhand == NULL)
157         {
158                 Con_Printf ("unable to check\n");
159                 return;
160         }
161         if (strstr(gl_extensions, "GL_ARB_multitexture "))
162         {
163                 Con_Printf ("GL_ARB_multitexture\n");
164                 qglMTexCoord2f = (void *)dlsym(dlhand, "glMultiTexCoord2fARB");
165                 qglSelectTexture = (void *)dlsym(dlhand, "glActiveTextureARB");
166                 gl_mtex_enum = GL_TEXTURE0_ARB;
167                 gl_mtexable = true;
168         } else if (strstr(gl_extensions, "GL_SGIS_multitexture "))
169         {
170                 Con_Printf ("GL_SGIS_multitexture\n");
171                 qglMTexCoord2f = (void *)dlsym(dlhand, "glMTexCoord2fSGIS");
172                 qglSelectTexture = (void *)dlsym(dlhand, "glSelectTextureSGIS");
173                 gl_mtex_enum = TEXTURE0_SGIS;
174                 gl_mtexable = true;
175         } else {
176                 Con_Printf ("none found\n");
177         }
178         dlclose(dlhand);
179         dlhand = NULL;          
180 }
181
182
183 typedef void (GLAPIENTRY *gl3DfxSetDitherModeEXT_FUNC) (GrDitherMode_t mode);
184
185 /*
186 ===============
187 GL_Init
188 ===============
189 */
190 void GL_Init (void)
191 {
192         gl_vendor = glGetString (GL_VENDOR);
193         Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
194         gl_renderer = glGetString (GL_RENDERER);
195         Con_Printf ("GL_RENDERER: %s\n", gl_renderer);
196
197         gl_version = glGetString (GL_VERSION);
198         Con_Printf ("GL_VERSION: %s\n", gl_version);
199         gl_extensions = glGetString (GL_EXTENSIONS);
200         Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);
201
202         CheckMultiTextureExtensions ();
203
204         glCullFace(GL_FRONT);
205         glEnable(GL_TEXTURE_2D);
206
207         glEnable(GL_ALPHA_TEST);
208         glAlphaFunc(GL_GREATER, 0.666);
209
210         glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
211         glShadeModel (GL_FLAT);
212
213         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
214         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
215         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
216         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
217
218         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
219
220         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
221
222         Con_Printf ("Dithering: ");
223
224         dlhand = dlopen (NULL, RTLD_LAZY);
225
226         if (dlhand == NULL) {
227                 Con_SafePrintf ("unable to set.\n");
228                 return;
229         }
230
231         if (strstr(gl_extensions, "3DFX_set_dither_mode")) {
232                 gl3DfxSetDitherModeEXT_FUNC dither_select = NULL;
233
234                 dither_select = (void *) dlsym(dlhand, "gl3DfxSetDitherModeEXT");
235
236                 if (COM_CheckParm ("-dither_2x2")) {
237                         dither_select(GR_DITHER_2x2);
238                         Con_Printf ("2x2.\n");
239                 } else if (COM_CheckParm ("-dither_4x4")) {
240                         dither_select(GR_DITHER_4x4);
241                         Con_Printf ("4x4.\n");
242                 } else {
243                         glDisable(GL_DITHER);
244                         Con_Printf ("disabled.\n");
245                 }
246         }
247         dlclose(dlhand);
248         dlhand = NULL;
249 }
250
251 /*
252 =================
253 GL_BeginRendering
254
255 =================
256 */
257 void GL_BeginRendering (int *x, int *y, int *width, int *height)
258 {
259         *x = *y = 0;
260         *width = scr_width;
261         *height = scr_height;
262
263 //    if (!wglMakeCurrent( maindc, baseRC ))
264 //              Sys_Error ("wglMakeCurrent failed");
265
266 //      glViewport (*x, *y, *width, *height);
267 }
268
269
270 void GL_EndRendering (void)
271 {
272         glFlush();
273         fxMesaSwapBuffers();
274 }
275
276 static int resolutions[][3]={
277         { 320,  200,    GR_RESOLUTION_320x200 },
278         { 320,  240,    GR_RESOLUTION_320x240 },
279         { 400,  256,    GR_RESOLUTION_400x256 },
280         { 400,  300,    GR_RESOLUTION_400x300 },
281         { 512,  256,    GR_RESOLUTION_512x256 },
282         { 512,  384,    GR_RESOLUTION_512x384 },
283         { 640,  200,    GR_RESOLUTION_640x200 },
284         { 640,  350,    GR_RESOLUTION_640x350 },
285         { 640,  400,    GR_RESOLUTION_640x400 },
286         { 640,  480,    GR_RESOLUTION_640x480 },
287         { 800,  600,    GR_RESOLUTION_800x600 },
288         { 856,  480,    GR_RESOLUTION_856x480 },
289         { 960,  720,    GR_RESOLUTION_960x720 },
290 #ifdef GR_RESOLUTION_1024x768
291         { 1024, 768,    GR_RESOLUTION_1024x768 },
292 #endif
293 #ifdef GR_RESOLUTION_1152x864
294         { 1152, 864,    GR_RESOLUTION_1152x864 },
295 #endif
296 #ifdef GR_RESOLUTION_1280x960
297         { 1280, 960,    GR_RESOLUTION_1280x960 },
298 #endif
299 #ifdef GR_RESOLUTION_1280x1024
300         { 1280, 1024,   GR_RESOLUTION_1280x1024 },
301 #endif
302 #ifdef GR_RESOLUTION_1600x1024
303         { 1600, 1024,   GR_RESOLUTION_1600x1024 },
304 #endif
305 #ifdef GR_RESOLUTION_1600x1200
306         { 1600, 1200,   GR_RESOLUTION_1600x1200 },
307 #endif
308 #ifdef GR_RESOLUTION_1792x1344
309         { 1792, 1344,   GR_RESOLUTION_1792x1344 },
310 #endif
311 #ifdef GR_RESOLUTION_1856x1392
312         { 1856, 1392,   GR_RESOLUTION_1856x1392 },
313 #endif
314 #ifdef GR_RESOLUTION_1920x1440
315         { 1920, 1440,   GR_RESOLUTION_1920x1440 },
316 #endif
317 #ifdef GR_RESOLUTION_2048x1536
318         { 2048, 1536,   GR_RESOLUTION_2048x1536 },
319 #endif
320 #ifdef GR_RESOLUTION_2048x2048
321         { 2048, 2048,   GR_RESOLUTION_2048x2048 }
322 #endif
323 };
324
325 #define NUM_RESOLUTIONS         (sizeof(resolutions)/(sizeof(int)*3))
326
327
328 static int
329 findres(int *width, int *height)
330 {
331         int i;
332
333         for(i=0; i < NUM_RESOLUTIONS; i++) {
334                 if((*width <= resolutions[i][0]) &&
335                    (*height <= resolutions[i][1])) {
336                         *width = resolutions[i][0];
337                         *height = resolutions[i][1];
338                         return resolutions[i][2];
339                 }
340         }
341
342         *width = 640;
343         *height = 480;
344         return GR_RESOLUTION_640x480;
345 }
346
347 qboolean VID_Is8bit(void)
348 {
349         return is8bit;
350 }
351
352 typedef void (GLAPIENTRY *glColorTableEXT_FUNC) (GLenum, GLenum, GLsizei, 
353                 GLenum, GLenum, const GLvoid *);
354 typedef void (GLAPIENTRY *gl3DfxSetPaletteEXT_FUNC) (GLuint *pal);
355
356 void VID_Init8bitPalette()
357 {
358         // Check for 8bit Extensions and initialize them.
359         int i;
360
361         dlhand = dlopen (NULL, RTLD_LAZY);
362
363         Con_SafePrintf ("8-bit GL extensions: ");
364
365         if (dlhand == NULL) {
366                 Con_SafePrintf ("unable to check.\n");
367                 return;
368         }
369
370         if (COM_CheckParm("-no8bit")) {
371                 Con_SafePrintf("disabled.\n");
372                 return;
373         }
374
375         if (strstr(gl_extensions, "3DFX_set_global_palette") && (qgl3DfxSetPaletteEXT = dlsym(dlhand, "gl3DfxSetPaletteEXT")) != NULL)
376         {
377                 GLubyte table[256][4];
378                 char *oldpal;
379
380                 Con_SafePrintf("3DFX_set_global_palette.\n");
381                 glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
382                 oldpal = (char *) d_8to24table; //d_8to24table3dfx;
383                 for (i=0;i<256;i++)
384                 {
385                         table[i][2] = *oldpal++;
386                         table[i][1] = *oldpal++;
387                         table[i][0] = *oldpal++;
388                         table[i][3] = 255;
389                         oldpal++;
390                 }
391                 qgl3DfxSetPaletteEXT((GLuint *)table);
392                 is8bit = true;
393         } else if (strstr(gl_extensions, "GL_EXT_shared_texture_palette")) {
394                 char thePalette[256*3];
395                 char *oldPalette, *newPalette;
396                 glColorTableEXT_FUNC load_texture = NULL;
397
398                 Con_SafePrintf("GL_EXT_shared.\n");
399                 load_texture = (void *) dlsym(dlhand, "glColorTableEXT");
400
401                 glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
402                 oldPalette = (char *) d_8to24table; //d_8to24table3dfx;
403                 newPalette = thePalette;
404                 for (i=0;i<256;i++) {
405                         *newPalette++ = *oldPalette++;
406                         *newPalette++ = *oldPalette++;
407                         *newPalette++ = *oldPalette++;
408                         oldPalette++;
409                 }
410                 load_texture(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (void *) thePalette);
411                 is8bit = true;
412         } else {
413                 Con_SafePrintf ("not found.\n");
414         }
415
416         dlclose(dlhand);
417         dlhand = NULL;
418 }
419
420 extern void Check_Gamma (unsigned char *pal);
421 void VID_Setup15to8Palette ();
422
423 void VID_Init(unsigned char *palette)
424 {
425         int i;
426         GLint attribs[32];
427         char    gldir[MAX_OSPATH];
428         int width = 640, height = 480;
429
430 // set vid parameters
431         attribs[0] = FXMESA_DOUBLEBUFFER;
432         attribs[1] = FXMESA_ALPHA_SIZE;
433         attribs[2] = 1;
434         attribs[3] = FXMESA_DEPTH_SIZE;
435         attribs[4] = 1;
436         attribs[5] = FXMESA_NONE;
437
438         if ((i = COM_CheckParm("-width")) != 0)
439                 width = atoi(com_argv[i+1]);
440         if ((i = COM_CheckParm("-height")) != 0)
441                 height = atoi(com_argv[i+1]);
442
443         if ((i = COM_CheckParm("-conwidth")) != 0)
444                 vid.conwidth = atoi(com_argv[i+1]);
445         else
446                 vid.conwidth = 640;
447
448         vid.conwidth &= 0xfff8; // make it a multiple of eight
449
450         if (vid.conwidth < 320)
451                 vid.conwidth = 320;
452
453         // pick a conheight that matches with correct aspect
454         vid.conheight = vid.conwidth*3 / 4;
455
456         if ((i = COM_CheckParm("-conheight")) != 0)
457                 vid.conheight = atoi(com_argv[i+1]);
458         if (vid.conheight < 200)
459                 vid.conheight = 200;
460
461         fc = fxMesaCreateContext(0, findres(&width, &height), GR_REFRESH_75Hz,
462                 attribs);
463         if (!fc)
464                 Sys_Error("Unable to create 3DFX context.\n");
465
466         scr_width = width;
467         scr_height = height;
468
469         fxMesaMakeCurrent(fc);
470
471         if (vid.conheight > height)
472                 vid.conheight = height;
473         if (vid.conwidth > width)
474                 vid.conwidth = width;
475         vid.width = vid.conwidth;
476         vid.height = vid.conheight;
477
478         vid.aspect = ((float)vid.height / (float)vid.width) * (320.0 / 240.0);
479
480         InitSig(); // trap evil signals
481
482         GL_Init();
483
484         snprintf(gldir, sizeof(gldir), "%s/glquake", com_gamedir);
485         Sys_mkdir (gldir);
486
487         VID_SetPalette(palette);
488
489         Check_Gamma(palette);
490
491         // Check for 3DFX Extensions and initialize them.
492         VID_Init8bitPalette();
493
494         if (is8bit) // LordHavoc: avoid calculating 15to8 table if it won't be used
495                 VID_Setup15to8Palette ();
496
497         Con_SafePrintf ("Video mode %dx%d initialized.\n", width, height);
498
499         vid.recalc_refdef = 1;                          // force a surface cache flush
500 }
501
502 void VID_ExtraOptionDraw(unsigned int options_draw_cursor)
503 {
504 /* Port specific Options menu entrys */
505 }
506
507 void VID_ExtraOptionCmd(int option_cursor)
508 {
509 /*
510         switch(option_cursor)
511         {
512         case 12:  // Always start with 12
513         break;
514         }
515 */
516 }
517 void VID_InitCvars ()
518 {
519 }
520
521 void VID_SetCaption (char *text)
522 {
523 }
524
525 void VID_HandlePause (qboolean pause)
526 {
527 }