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nuq/source/vid_common_gl.c

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