mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-11-26 14:00:52 +00:00
402 lines
8.8 KiB
C
402 lines
8.8 KiB
C
/*
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vid_common_gl.c
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Common OpenGL video driver functions
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <GL/gl.h>
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#ifdef HAVE_GL_GLEXT_H
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#include <GL/glext.h>
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#endif
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#include <string.h>
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#ifdef HAVE_DLFCN_H
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# include <dlfcn.h>
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#endif
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#ifndef RTLD_LAZY
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# ifdef DL_LAZY
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# define RTLD_LAZY DL_LAZY
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# else
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# define RTLD_LAZY 0
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# endif
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#endif
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#include "console.h"
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#include "glquake.h"
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#include "input.h"
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#include "qargs.h"
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#include "quakefs.h"
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#include "sbar.h"
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#define WARP_WIDTH 320
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#define WARP_HEIGHT 200
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#ifdef HAVE_DLOPEN
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static void *dlhand = NULL;
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#endif
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//unsigned short d_8to16table[256];
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unsigned int d_8to24table[256];
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unsigned char d_15to8table[65536];
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cvar_t *vid_mode;
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/*-----------------------------------------------------------------------*/
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int texture_mode = GL_LINEAR;
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int texture_extension_number = 1;
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float gldepthmin, gldepthmax;
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const char *gl_vendor;
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const char *gl_renderer;
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const char *gl_version;
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const char *gl_extensions;
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// ARB Multitexture
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int gl_mtex_enum = TEXTURE0_SGIS;
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qboolean gl_arb_mtex = false;
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qboolean gl_mtexable = false;
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qboolean is8bit = false;
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cvar_t *vid_use8bit;
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/*-----------------------------------------------------------------------*/
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/*
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CheckMultiTextureExtensions
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Check for ARB, SGIS, or EXT multitexture support
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*/
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void
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CheckMultiTextureExtensions (void)
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{
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Con_Printf ("Checking for multitexture... ");
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if (COM_CheckParm ("-nomtex")) {
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Con_Printf ("disabled\n");
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return;
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}
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#ifdef HAVE_DLOPEN
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dlhand = dlopen (NULL, RTLD_LAZY);
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if (dlhand == NULL) {
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Con_Printf ("unable to check\n");
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return;
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}
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if (strstr(gl_extensions, "GL_ARB_multitexture ")) {
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Con_Printf ("GL_ARB_multitexture\n");
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qglMTexCoord2f = (void *)dlsym(dlhand, "glMultiTexCoord2fARB");
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qglSelectTexture = (void *)dlsym(dlhand, "glActiveTextureARB");
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gl_mtex_enum = GL_TEXTURE0_ARB;
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gl_mtexable = true;
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gl_arb_mtex = true;
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} else if (strstr(gl_extensions, "GL_SGIS_multitexture ")) {
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Con_Printf ("GL_SGIS_multitexture\n");
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qglMTexCoord2f = (void *)dlsym(dlhand, "glMTexCoord2fSGIS");
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qglSelectTexture = (void *)dlsym(dlhand, "glSelectTextureSGIS");
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gl_mtex_enum = TEXTURE0_SGIS;
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gl_mtexable = true;
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gl_arb_mtex = false;
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} else if (strstr(gl_extensions, "GL_EXT_multitexture ")) {
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Con_Printf ("GL_EXT_multitexture\n");
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qglMTexCoord2f = (void *)dlsym(dlhand, "glMTexCoord2fEXT");
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qglSelectTexture = (void *)dlsym(dlhand, "glSelectTextureEXT");
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gl_mtex_enum = TEXTURE0_SGIS;
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gl_mtexable = true;
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gl_arb_mtex = false;
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} else {
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Con_Printf ("none found\n");
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}
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dlclose(dlhand);
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dlhand = NULL;
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#else
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gl_mtexable = false;
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#endif
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}
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void
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VID_SetPalette (unsigned char *palette)
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{
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byte *pal;
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unsigned int r,g,b;
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unsigned int v;
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int r1,g1,b1;
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int k;
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unsigned short i;
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unsigned int *table;
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QFile *f;
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char s[255];
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float dist, bestdist;
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static qboolean palflag = false;
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//
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// 8 8 8 encoding
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//
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// Con_Printf("Converting 8to24\n");
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pal = palette;
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table = d_8to24table;
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for (i = 0; i < 255; i++) { // used to be i<256, see d_8to24table below
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r = pal[0];
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g = pal[1];
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b = pal[2];
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pal += 3;
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// v = (255<<24) + (r<<16) + (g<<8) + (b<<0);
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// v = (255<<0) + (r<<8) + (g<<16) + (b<<24);
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v = (255<<24) + (r<<0) + (g<<8) + (b<<16);
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*table++ = v;
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}
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d_8to24table[255] = 0; // 255 is transparent
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// JACK: 3D distance calcs - k is last closest, l is the distance.
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// FIXME: Precalculate this and cache to disk.
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if (palflag)
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return;
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palflag = true;
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COM_FOpenFile("glquake/15to8.pal", &f);
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if (f) {
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Qread(f, d_15to8table, 1<<15);
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Qclose(f);
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} else {
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for (i = 0; i < (1<<15); i++) {
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/* Maps
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000000000000000
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000000000011111 = Red = 0x1F
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000001111100000 = Blue = 0x03E0
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111110000000000 = Grn = 0x7C00
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*/
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r = ((i & 0x1F) << 3) + 4;
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g = ((i & 0x03E0) >> 2) + 4;
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b = ((i & 0x7C00) >> 7) + 4;
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pal = (unsigned char *) d_8to24table;
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for (v=0, k=0, bestdist = 10000.0; v<256; v++,pal+=4) {
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r1 = (int)r - (int)pal[0];
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g1 = (int)g - (int)pal[1];
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b1 = (int)b - (int)pal[2];
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dist = sqrt(((r1*r1)+(g1*g1)+(b1*b1)));
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if (dist < bestdist) {
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k=v;
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bestdist = dist;
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}
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}
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d_15to8table[i]=k;
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}
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snprintf(s, sizeof(s), "%s/glquake/15to8.pal", com_gamedir);
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COM_CreatePath (s);
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if ((f = Qopen(s, "wb")) != NULL) {
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Qwrite(f, d_15to8table, 1<<15);
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Qclose(f);
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}
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}
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}
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/*
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===============
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GL_Init_Common
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===============
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*/
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void
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GL_Init_Common (void)
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{
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gl_vendor = glGetString (GL_VENDOR);
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Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
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gl_renderer = glGetString (GL_RENDERER);
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Con_Printf ("GL_RENDERER: %s\n", gl_renderer);
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gl_version = glGetString (GL_VERSION);
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Con_Printf ("GL_VERSION: %s\n", gl_version);
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gl_extensions = glGetString (GL_EXTENSIONS);
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Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);
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glClearColor (0,0,0,0);
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glCullFace(GL_FRONT);
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glEnable(GL_TEXTURE_2D);
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glEnable(GL_ALPHA_TEST);
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glAlphaFunc(GL_GREATER, 0.666);
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glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
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glShadeModel (GL_FLAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glEnable(GL_BLEND);
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glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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CheckMultiTextureExtensions ();
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}
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/*
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=================
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GL_BeginRendering
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=================
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*/
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void
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GL_BeginRendering (int *x, int *y, int *width, int *height)
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{
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*x = *y = 0;
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*width = scr_width;
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*height = scr_height;
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}
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qboolean VID_Is8bit(void)
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{
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return is8bit;
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}
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#ifdef HAVE_TDFXGL
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void 3dfx_Init8bitPalette()
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{
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// Check for 8bit Extensions and initialize them.
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int i;
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dlhand = dlopen (NULL, RTLD_LAZY);
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Con_Printf ("8-bit GL extensions: ");
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if (dlhand == NULL) {
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Con_Printf ("unable to check.\n");
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return;
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}
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if (strstr(gl_extensions, "3DFX_set_global_palette")) {
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char *oldpal;
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GLubyte table[256][4];
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gl3DfxSetPaletteEXT_FUNC load_texture = NULL;
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Con_Printf("3DFX_set_global_palette.\n");
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load_texture = (void *) dlsym(dlhand, "gl3DfxSetPaletteEXT");
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glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
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oldpal = (char *) d_8to24table; //d_8to24table3dfx;
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for (i=0;i<256;i++) {
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table[i][2] = *oldpal++;
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table[i][1] = *oldpal++;
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table[i][0] = *oldpal++;
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table[i][3] = 255;
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oldpal++;
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}
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load_texture((GLuint *)table);
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is8bit = true;
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} else Shared_Init8bitPalette();
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dlclose(dlhand);
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dlhand = NULL;
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Con_Printf ("not found.\n");
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}
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#endif
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#ifdef GL_SHARED_TEXTURE_PALETTE_EXT
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void
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Shared_Init8bitPalette()
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{
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int i;
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char thePalette[256*3];
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char *oldPalette, *newPalette;
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if (strstr(gl_extensions, "GL_EXT_shared_texture_palette") == NULL)
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return;
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#ifdef HAVE_TDFXGL
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glColorTableEXT_FUNC load_texture = NULL;
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load_texture = (void *) dlsym(dlhand, "glColorTableEXT");
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#endif
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Con_Printf("8-bit GL extensions enabled.\n");
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glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
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oldPalette = (char *) d_8to24table; //d_8to24table3dfx;
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newPalette = thePalette;
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for (i=0;i<256;i++) {
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*newPalette++ = *oldPalette++;
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*newPalette++ = *oldPalette++;
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*newPalette++ = *oldPalette++;
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oldPalette++;
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}
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is8bit = true;
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if (strstr(gl_renderer, "Mesa Glide")) {
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#ifdef HAVE_TDFXGL
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load_texture(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (void *) thePalette);
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#endif
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} else
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glColorTable(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (void *) thePalette);
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}
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#endif
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void
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VID_Init8bitPalette(void)
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{
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if (COM_CheckParm("-no8bit")) {
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Con_Printf("disabled.\n");
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return;
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}
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vid_use8bit = Cvar_Get ("vid_use8bit", "0", CVAR_ROM,
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"Whether to use Shared Palettes.");
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if (vid_use8bit->value) {
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#ifdef HAVE_TDFXGL
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3dfx_Init8bitPalette();
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#else
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#ifdef GL_SHARED_TEXTURE_PALETTE_EXT
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Shared_Init8bitPalette();
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#endif
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#endif
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}
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}
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void
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VID_LockBuffer ( void )
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{
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}
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void
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VID_UnlockBuffer ( void )
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{
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}
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void
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D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
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{
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}
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void
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D_EndDirectRect (int x, int y, int width, int height)
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{
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}
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