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quakeforge/libs/video/targets/vid_common_gl.c
Zephaniah E. Hull 3715430479 This is changing more then I wanted to at once, however. 
The major change is that we no longer require libGL to even exist on the
system at compile time for the GL targets, we dynamicly link to the
libGL of choice at run time. (This probably breaks most non-linux
systems, and all GL targets except -glx, some fixup will be needed.)
(This also kills glquake, dead dead DEAD! GONE FOREVER! WHEE!)

Some gl_draw cleanup.

Commented out equake alias model occlusion test stuff, very experimental.

Added the .lo and .la patterns to the .gitignore files.

Some minor sbar cleanup. (We don't use the disc in use symbol for
anything.)
2001-06-24 09:25:55 +00:00

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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
$Id$
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_MATH_H
# include <math.h>
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef _WIN32
// must be BEFORE include gl/gl.h
# include "winquake.h"
#endif
#include "compat.h"
#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/input.h"
#include "QF/qargs.h"
#include "QF/vfs.h"
#include "QF/vid.h"
#include "QF/sys.h"
#include "QF/GL/qf_ext.h"
#include "QF/GL/funcs.h"
#include "QF/GL/defines.h"
#include "sbar.h"
#define WARP_WIDTH 320
#define WARP_HEIGHT 200
unsigned int d_8to24table[256];
unsigned char d_15to8table[65536];
cvar_t *vid_mode;
cvar_t *gl_multitexture;
extern byte gammatable[256];
extern qboolean GLF_Init ();
QF_glActiveTextureARB qglActiveTexture = NULL;
QF_glMultiTexCoord2fARB qglMultiTexCoord2f = NULL;
int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST, gl_filter_max = 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
qboolean gl_mtex_capable = false;
GLenum gl_mtex_enum = GL_TEXTURE0_ARB;
QF_glColorTableEXT qglColorTableEXT = NULL;
qboolean is8bit = false;
cvar_t *vid_use8bit;
/*-----------------------------------------------------------------------*/
void
GL_Common_Init_Cvars (void)
{
vid_use8bit = Cvar_Get ("vid_use8bit", "0", CVAR_ROM, NULL, "Use 8-bit shared palettes.");
gl_multitexture = Cvar_Get ("gl_multitexture", "0", CVAR_ARCHIVE, NULL, "Use multitexture when available");
}
/*
CheckMultiTextureExtensions
Check for ARB multitexture support
*/
void
CheckMultiTextureExtensions (void)
{
Con_Printf ("Checking for multitexture: ");
if (COM_CheckParm ("-nomtex")) {
Con_Printf ("disabled.\n");
return;
}
if (QFGL_ExtensionPresent ("GL_ARB_multitexture")) {
int max_texture_units = 0;
QFGL_glGetIntegerv (GL_MAX_TEXTURE_UNITS_ARB, &max_texture_units);
if (max_texture_units >= 2) {
Con_Printf ("enabled, %d TMUs.\n", max_texture_units);
qglMultiTexCoord2f = QFGL_ExtensionAddress ("glMultiTexCoord2fARB");
qglActiveTexture = QFGL_ExtensionAddress ("glActiveTextureARB");
gl_mtex_enum = GL_TEXTURE0_ARB;
gl_mtex_capable = true;
} else {
Con_Printf ("disabled, not enough TMUs.\n");
}
} else {
Con_Printf ("not found.\n");
}
}
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;
VFile *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;
#ifdef WORDS_BIGENDIAN
v = (255 << 0) + (r << 24) + (g << 16) + (b << 8);
#else
v = (255 << 24) + (r << 0) + (g << 8) + (b << 16);
#endif
*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_Common_Init_Cvars ();
if (!GLF_Init()) {
Sys_Error("Can't init video.\n");
return;
}
gl_vendor = QFGL_glGetString (GL_VENDOR);
Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
gl_renderer = QFGL_glGetString (GL_RENDERER);
Con_Printf ("GL_RENDERER: %s\n", gl_renderer);
gl_version = QFGL_glGetString (GL_VERSION);
Con_Printf ("GL_VERSION: %s\n", gl_version);
gl_extensions = QFGL_glGetString (GL_EXTENSIONS);
Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);
QFGL_glClearColor (0, 0, 0, 0);
QFGL_glCullFace (GL_FRONT);
QFGL_glEnable (GL_TEXTURE_2D);
QFGL_glEnable (GL_ALPHA_TEST);
QFGL_glAlphaFunc (GL_GREATER, 0.666);
QFGL_glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
QFGL_glShadeModel (GL_FLAT);
QFGL_glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
QFGL_glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
QFGL_glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
QFGL_glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
QFGL_glEnable (GL_BLEND);
QFGL_glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
QFGL_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 GL_SHARED_TEXTURE_PALETTE_EXT
void
Tdfx_Init8bitPalette (void)
{
// Check for 8bit Extensions and initialize them.
int i;
if (is8bit) {
return;
}
if (QFGL_ExtensionPresent ("3DFX_set_global_palette")) {
char *oldpal;
GLubyte table[256][4];
QF_gl3DfxSetPaletteEXT qgl3DfxSetPaletteEXT = NULL;
if (!(qgl3DfxSetPaletteEXT = QFGL_ExtensionAddress ("gl3DfxSetPaletteEXT"))) {
Con_Printf ("3DFX_set_global_palette not found.\n");
return;
}
Con_Printf ("3DFX_set_global_palette.\n");
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++;
}
QFGL_glEnable (GL_SHARED_TEXTURE_PALETTE_EXT);
qgl3DfxSetPaletteEXT ((GLuint *) table);
is8bit = true;
} else {
Con_Printf ("\n 3DFX_set_global_palette not found.");
}
}
/*
* The GL_EXT_shared_texture_palette seems like an idea which is
* /almost/ a good idea, but seems to be severely broken with many
* drivers, as such it is disabled.
*
* It should be noted, that a palette object extension as suggested by
* the GL_EXT_shared_texture_palette spec might be a very good idea in
* general.
*/
void
Shared_Init8bitPalette (void)
{
int i;
GLubyte thePalette[256 * 3];
GLubyte *oldPalette, *newPalette;
if (is8bit) {
return;
}
if (QFGL_ExtensionPresent ("GL_EXT_shared_texture_palette")) {
if (!(qglColorTableEXT = QFGL_ExtensionAddress ("glColorTableEXT"))) {
Con_Printf ("glColorTableEXT not found.\n");
return;
}
Con_Printf ("GL_EXT_shared_texture_palette\n");
QFGL_glEnable (GL_SHARED_TEXTURE_PALETTE_EXT);
oldPalette = (GLubyte *) d_8to24table; // d_8to24table3dfx;
newPalette = thePalette;
for (i = 0; i < 256; i++) {
*newPalette++ = *oldPalette++;
*newPalette++ = *oldPalette++;
*newPalette++ = *oldPalette++;
oldPalette++;
}
qglColorTableEXT (GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB,
GL_UNSIGNED_BYTE, (GLvoid *) thePalette);
is8bit = true;
} else {
Con_Printf ("\n GL_EXT_shared_texture_palette not found.");
}
}
#endif
void
VID_Init8bitPalette (void)
{
Con_Printf ("Checking for 8-bit extension: ");
if (vid_use8bit->int_val) {
#ifdef GL_SHARED_TEXTURE_PALETTE_EXT
Tdfx_Init8bitPalette ();
Shared_Init8bitPalette ();
#endif
if (!is8bit) {
Con_Printf ("\n 8-bit extension not found.\n");
}
} else {
Con_Printf ("disabled.\n");
}
}
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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