mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-11-21 19:51:18 +00:00
380 lines
8.5 KiB
C
380 lines
8.5 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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$Id$
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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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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#ifdef _WIN32
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// must be BEFORE include gl/gl.h
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# include "winquake.h"
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#endif
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#include <GL/gl.h>
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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 "qfgl_ext.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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//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_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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qboolean gl_mtex_capable = false;
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GLenum gl_mtex_enum = GL_TEXTURE0_ARB;
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QF_glColorTableEXT qglColorTableEXT = NULL;
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qboolean is8bit = false;
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cvar_t *vid_use8bit;
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cvar_t *brightness;
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cvar_t *contrast;
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extern int gl_filter_min, gl_filter_max;
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/*-----------------------------------------------------------------------*/
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void
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GL_Common_Init_Cvars (void)
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{
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vid_use8bit = Cvar_Get ("vid_use8bit", "0", CVAR_ROM, NULL, "Use 8-bit shared palettes.");
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brightness = Cvar_Get ("brightness", "1", CVAR_ARCHIVE, NULL, "Brightness level");
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contrast = Cvar_Get ("contrast", "1", CVAR_ARCHIVE, NULL, "Contrast level");
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gl_multitexture = Cvar_Get ("gl_multitexture", "0", CVAR_ARCHIVE, NULL, "Use multitexture when available");
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}
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/*
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CheckMultiTextureExtensions
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Check for ARB 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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if (QFGL_ExtensionPresent ("GL_ARB_multitexture")) {
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int max_texture_units = 0;
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glGetIntegerv (GL_MAX_TEXTURE_UNITS_ARB, &max_texture_units);
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if (max_texture_units >= 2) {
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Con_Printf ("enabled, %d TMUs.\n", max_texture_units);
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qglMultiTexCoord2f = QFGL_ExtensionAddress ("glMultiTexCoord2fARB");
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qglActiveTexture = QFGL_ExtensionAddress ("glActiveTextureARB");
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gl_mtex_enum = GL_TEXTURE0_ARB;
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gl_mtex_capable = true;
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} else {
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Con_Printf ("disabled, not enough TMUs.\n");
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}
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} else {
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Con_Printf ("not found.\n");
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}
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}
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// LordHavoc: finds closest color match
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byte
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LHFindColor(unsigned char *palette, int first, int last, int r, int g, int b)
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{
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int i, bestdistance, bestcolor, distance, color[3];
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bestdistance = 1000000000;
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bestcolor = first;
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color[0] = r;
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color[1] = g;
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color[2] = b;
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palette += first * 3;
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for (i = first; i < last; i++) {
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// LordHavoc: distance in color cube from desired color
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distance = VectorDistance_fast(palette, color);
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if (distance < bestdistance) {
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bestdistance = distance;
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bestcolor = i;
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}
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palette += 3;
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}
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return bestcolor;
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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, *out;
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unsigned short i;
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QFile *f;
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char s[255];
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static qboolean palflag = false;
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// Con_Printf("Converting 8to24\n");
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// LordHavoc: cleaned up stupid endian-specific table building,
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// now builds directly as bytes
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pal = palette;
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out = (byte *)&d_8to24table;
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for (i = 0; i < 255; i++) {
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*out++ = *pal++;
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*out++ = *pal++;
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*out++ = *pal++;
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*out++ = 255;
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}
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d_8to24table[255] = 0; // 255 is transparent
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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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// LordHavoc: cleaned this up
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Con_DPrintf("Building 15bit to 8bit color conversion table\n");
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for (i = 0; i < (1 << 15); i++) {
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int r, g, b;
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// split out to 8bit components
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r = ((i & 0x001F) >> 0) << 3;
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g = ((i & 0x03E0) >> 5) << 3;
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b = ((i & 0x7C00) >> 10) << 3;
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d_15to8table[i] = LHFindColor (palette, 0, 256, r, g, b);
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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"))) {
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Qwrite (f, d_15to8table, 32768);
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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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GL_Init_Common
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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_Common_Init_Cvars ();
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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_filter_min);
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glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
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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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GL_BeginRendering
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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 GL_SHARED_TEXTURE_PALETTE_EXT
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void
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Tdfx_Init8bitPalette (void)
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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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if (is8bit) {
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return;
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}
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if (QFGL_ExtensionPresent ("3DFX_set_global_palette")) {
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char *oldpal;
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GLubyte table[256][4];
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QF_gl3DfxSetPaletteEXT qgl3DfxSetPaletteEXT = NULL;
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if (!(qgl3DfxSetPaletteEXT = QFGL_ExtensionAddress ("gl3DfxSetPaletteEXT"))) {
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return;
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}
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Con_Printf ("3DFX_set_global_palette.\n");
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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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glEnable (GL_SHARED_TEXTURE_PALETTE_EXT);
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qgl3DfxSetPaletteEXT ((GLuint *) table);
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is8bit = true;
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}
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}
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/*
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* The GL_EXT_shared_texture_palette seems like an idea which is
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* /almost/ a good idea, but seems to be severely broken with many
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* drivers, as such it is disabled.
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*
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* It should be noted, that a palette object extension as suggested by
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* the GL_EXT_shared_texture_palette spec might be a very good idea in
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* general.
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*/
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void
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Shared_Init8bitPalette (void)
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{
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int i;
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GLubyte thePalette[256 * 3];
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GLubyte *oldPalette, *newPalette;
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if (is8bit) {
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return;
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}
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if (QFGL_ExtensionPresent ("GL_EXT_shared_texture_palette")) {
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if (!(qglColorTableEXT = QFGL_ExtensionAddress ("glColorTableEXT"))) {
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return;
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}
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Con_Printf ("GL_EXT_shared_texture_palette\n");
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glEnable (GL_SHARED_TEXTURE_PALETTE_EXT);
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oldPalette = (GLubyte *) 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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qglColorTableEXT (GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB,
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GL_UNSIGNED_BYTE, (GLvoid *) thePalette);
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is8bit = true;
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}
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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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Con_Printf ("Checking for 8-bit extension: ");
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if (vid_use8bit->int_val) {
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#ifdef GL_SHARED_TEXTURE_PALETTE_EXT
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Tdfx_Init8bitPalette ();
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Shared_Init8bitPalette ();
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#endif
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if (!is8bit) {
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Con_Printf ("not found.\n");
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}
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} else {
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Con_Printf ("disabled.\n");
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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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