mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-10 23:32:09 +00:00
411 lines
9.1 KiB
C
411 lines
9.1 KiB
C
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/*
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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 "QF/console.h"
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#include "glquake.h"
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#include "input.h"
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#include "QF/qargs.h"
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#include "QF/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
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//
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//
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// 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 000000000000000 000000000011111 = Red = 0x1F
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000001111100000 = Blue = 0x03E0 111110000000000 = Grn =
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0x7C00 */
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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
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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 3
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dfx_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
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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
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(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,
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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,
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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, 0,
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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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3 dfx_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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