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tenebrae2/gl_common.c

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2003-01-17 21:18:53 +00:00
/*
Copyright (C) 1996-1997 Id Software, Inc.
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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// gl_common.c -- OpenGL common routines
#include "quakedef.h"
const char *gl_vendor;
const char *gl_renderer;
const char *gl_version;
const char *gl_extensions;
qboolean fullsbardraw = false;
float vid_gamma = 1.0;
qboolean is8bit = false;
qboolean isPermedia = false;
qboolean gl_mtexable = false;
qcardtype gl_cardtype = GENERIC;
qboolean gl_var = false; //PENTA: vertex array range is available
qboolean gl_texcomp = false; // JP: texture compression available
//void (*qglColorTableEXT) (int, int, int, int, int, const void*);
//void (*qgl3DfxSetPaletteEXT) (GLuint *);
typedef void (*GLCOLORTABLEEXTPFN) (int, int, int, int, int, const void*) ;
GLCOLORTABLEEXTPFN qglColorTableEXT;
typedef void (*GL3DFXSETPALETTEEXTPFN) (GLuint *) ;
GL3DFXSETPALETTEEXTPFN qgl3DfxSetPaletteEXT;
//int texture_mode = GL_NEAREST;
//int texture_mode = GL_NEAREST_MIPMAP_NEAREST;
//int texture_mode = GL_NEAREST_MIPMAP_LINEAR;
int texture_mode = GL_LINEAR;
//int texture_mode = GL_LINEAR_MIPMAP_NEAREST;
//int texture_mode = GL_LINEAR_MIPMAP_LINEAR;
int texture_extension_number = 1;
float gldepthmin, gldepthmax;
//cvar_t gl_ztrick = {"gl_ztrick","1"}; PENTA: Removed
// <AWE> Two more extensions. Added already check for paletted texture to gl_vidnt.c.
// However any code for anisotropic texture filtering has still to be added to gl_vidnt.c.
// <AWE> true for "gl_EXT_paletted_texture" [GL_Upload8_EXT].
qboolean gl_palettedtex = false;
// <AWE> true for "GL_EXT_texture_filter_anisotropic".
qboolean gl_texturefilteranisotropic = false;
// <AWE> anistropic texture level [= 1.0f or max. value].//Penta?? Changed to 2.0 because 1.0 is just isotropic filtering
GLfloat gl_textureanisotropylevel = 2.0f;
// <AWE> On MacOSX X we use this var to store the state. 0 = off, 1 = on.
//cvar_t gl_anisotropic = { "gl_anisotropic", "0", 1 };
unsigned short d_8to16table[256];
unsigned d_8to24table[256];
unsigned char d_15to8table[65536];
unsigned char d_8to8graytable[256];
/*-----------------------------------------------------------------------*/
/*
<AWE> required for GL_Upload8_EXT ():
*/
int Q_strncasecmp (char *s1,char *s2,int count);
void VID_SetPalette (unsigned char *palette)
{
byte *pal;
unsigned r,g,b;
unsigned a;
unsigned v;
int r1,g1,b1;
int j,k,l,m;
unsigned short i;
unsigned *table;
unsigned char *shade;
int dist, bestdist;
//
// 8 8 8 encoding
//
pal = palette;
table = d_8to24table;
shade = d_8to8graytable;
for (i=0 ; i<256 ; i++)
{
r = pal[0];
g = pal[1];
b = pal[2];
pal += 3;
//PENTA: fullbright colors
//a = i;//(i >= 192) ? 255 : 0;
a = 255;
v = (a<<24) + (r<<0) + (g<<8) + (b<<16);
*table++ = v;
//PENA: Grayscale conversion for bump maps
*shade++ = ((r+g+b)/3);
}
d_8to24table[255] &= 0xffffff; // 255 is transparent
// JACK: 3D distance calcs - k is last closest, l is the distance.
// FIXME: Precalculate this and cache to disk.
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*10000; v<256; v++,pal+=4) {
r1 = (int)r - (int)pal[0];
g1 = (int)g - (int)pal[1];
b1 = (int)b - (int)pal[2];
dist = (r1*r1)+(g1*g1)+(b1*b1);
if (dist < bestdist) {
k=v;
bestdist = dist;
}
}
d_15to8table[i]=k;
}
}
//BOOL gammaworks;
void VID_ShiftPalette (unsigned char *palette)
{
// extern byte ramps[3][256];
// VID_SetPalette (palette);
// gammaworks = SetDeviceGammaRamp (maindc, ramps);
}
void CheckPalettedTexture (void)
{
if (strstr (gl_extensions, "GL_EXT_paletted_texture"))
{
gl_palettedtex = true;
Con_Printf ("Found GL_EXT_paletted_texture...\n");
}
}
/*
BINDTEXFUNCPTR bindTexFunc;
#define TEXTURE_EXT_STRING "GL_EXT_texture_object"
/*
PENTA; not used anymore
*/
/*
void CheckArrayExtensions (void)
{
char *tmp;
// check for texture extension
tmp = (unsigned char *)glGetString(GL_EXTENSIONS);
while (*tmp)
{
if (strncmp((const char*)tmp, "GL_EXT_vertex_array", strlen("GL_EXT_vertex_array")) == 0)
{
if (
((SAFE_GET_PROC (glArrayElementEXT, (void *), "glArrayElementEXT")) == NULL) ||
((SAFE_GET_PROC (glColorPointerEXT, (void *), "glColorPointerEXT")) == NULL) ||
((SAFE_GET_PROC (glTexCoordPointerEXT, (void *), "glTexCoordPointerEXT")) == NULL) ||
((SAFE_GET_PROC (glVertexPointerEXT, (void *), "glVertexPointerEXT")) == NULL) )
{
Sys_Error ("GetProcAddress for vertex extension failed");
return;
}
return;
}
tmp++;
}
Sys_Error ("Vertex array extension not present");
}
*/
void CheckMultiTextureExtensions(void)
{
if (strstr(gl_extensions, "GL_ARB_multitexture")) {
SAFE_GET_PROC (qglActiveTextureARB,PFNGLACTIVETEXTUREARBPROC,"glActiveTextureARB");
SAFE_GET_PROC (qglClientActiveTextureARB,PFNGLCLIENTACTIVETEXTUREARBPROC,"glClientActiveTextureARB");
SAFE_GET_PROC (qglMultiTexCoord1fARB,PFNGLMULTITEXCOORD1FARBPROC,"glMultiTexCoord1fARB");
SAFE_GET_PROC (qglMultiTexCoord2fARB,PFNGLMULTITEXCOORD2FARBPROC,"glMultiTexCoord2fARB");
SAFE_GET_PROC (qglMultiTexCoord2fvARB,PFNGLMULTITEXCOORD2FVARBPROC,"glMultiTexCoord2fvARB");
SAFE_GET_PROC (qglMultiTexCoord3fARB,PFNGLMULTITEXCOORD3FARBPROC,"glMultiTexCoord3fARB");
SAFE_GET_PROC (qglMultiTexCoord3fvARB,PFNGLMULTITEXCOORD3FVARBPROC,"glMultiTexCoord3fvARB");
gl_mtexable = true;
} else {
Sys_Error ("No multitexturing found.\nProbably your 3d-card is not supported.\n");
}
}
/*
PENTA: If we don't have these extensions then we don't continue
(how would we ever draw bump maps is these simpel ext's aren't supported)
*/
void CheckDiffuseBumpMappingExtensions(void)
{
if (!strstr(gl_extensions, "GL_EXT_texture_env_combine") &&
!strstr(gl_extensions, "GL_ARB_texture_env_combine") ) {
Sys_Error ("EXT_texture_env_combine not found.\nProbably your 3d-card is not supported.\n");
}
if (!strstr(gl_extensions, "GL_ARB_texture_env_dot3")) {
Sys_Error ("ARB_texture_env_dot3 not found.\nProbably your 3d-card is not supported.\n");
}
if (!strstr(gl_extensions, "GL_ARB_texture_cube_map")) {
Sys_Error ("ARB_texture_cube_map not found.\nProbably your 3d-card is not supported.\n");
}
//Just spit a warning user prob has gl-1.2 or something
if (!strstr(gl_extensions, "GL_SGI_texture_edge_clamp") &&
!strstr(gl_extensions, "GL_EXT_texture_edge_clamp")) {
Con_Printf("Warning no edge_clamp extension found");
}
}
/*
PENTA: if we don't have these we continue with less eficient specular
*/
void CheckSpecularBumpMappingExtensions(void)
{
if ( (strstr(gl_extensions, "GL_NV_register_combiners")) && (!COM_CheckParm ("-forcenonv")) ) {
gl_cardtype = GEFORCE; // GEFORCE3 checked later
SAFE_GET_PROC (qglCombinerParameterfvNV,PFNGLCOMBINERPARAMETERFVNVPROC,"glCombinerParameterfvNV");
SAFE_GET_PROC (qglCombinerParameterivNV,PFNGLCOMBINERPARAMETERIVNVPROC,"glCombinerParameterivNV");
SAFE_GET_PROC (qglCombinerParameterfNV,PFNGLCOMBINERPARAMETERFNVPROC,"glCombinerParameterfNV");
SAFE_GET_PROC (qglCombinerParameteriNV,PFNGLCOMBINERPARAMETERINVPROC,"glCombinerParameteriNV");
SAFE_GET_PROC (qglCombinerInputNV,PFNGLCOMBINERINPUTNVPROC,"glCombinerInputNV");
SAFE_GET_PROC (qglCombinerOutputNV,PFNGLCOMBINEROUTPUTNVPROC,"glCombinerOutputNV");
SAFE_GET_PROC (qglFinalCombinerInputNV,PFNGLFINALCOMBINERINPUTNVPROC,"glFinalCombinerInputNV");
SAFE_GET_PROC (qglGetCombinerInputParameterfvNV,PFNGLGETCOMBINERINPUTPARAMETERFVNVPROC,"glGetCombinerInputParameterfvNV");
SAFE_GET_PROC (qglGetCombinerInputParameterivNV,PFNGLGETCOMBINERINPUTPARAMETERIVNVPROC,"glGetCombinerInputParameterivNV");
SAFE_GET_PROC (qglGetCombinerOutputParameterfvNV,PFNGLGETCOMBINEROUTPUTPARAMETERFVNVPROC,"glGetCombinerOutputParameterfvNV");
SAFE_GET_PROC (qglGetCombinerOutputParameterivNV,PFNGLGETCOMBINEROUTPUTPARAMETERIVNVPROC,"glGetCombinerOutputParameterivNV");
SAFE_GET_PROC (qglGetFinalCombinerInputParameterfvNV,PFNGLGETFINALCOMBINERINPUTPARAMETERFVNVPROC,"glGetFinalCombinerInputfvNV");
SAFE_GET_PROC (qglGetFinalCombinerInputParameterivNV,PFNGLGETFINALCOMBINERINPUTPARAMETERIVNVPROC,"glGetFinalCombinerInputivNV");
}
}
/*
PENTA: if we have these we draw optimized
*/
void CheckGeforce3Extensions(void)
{
int supportedTmu;
glGetIntegerv(GL_MAX_ACTIVE_TEXTURES_ARB,&supportedTmu);
//Con_Printf("%i texture units\n",supportedTmu);
if (strstr(gl_extensions, "GL_EXT_texture3D")
&& (supportedTmu >= 4) && (!COM_CheckParm ("-forcegf2"))
&& (gl_cardtype == GEFORCE)
&& strstr(gl_extensions, "GL_NV_vertex_program1_1")
&& strstr(gl_extensions, "GL_NV_vertex_array_range"))
{
gl_cardtype = GEFORCE3;
SAFE_GET_PROC (qglTexImage3DEXT,PFNGLTEXIMAGE3DEXT,"glTexImage3DEXT");
//get vertex_program pointers
SAFE_GET_PROC (qglAreProgramsResidentNV,PFNGLAREPROGRAMSRESIDENTNVPROC,"glAreProgramsResidentNV");
SAFE_GET_PROC (qglBindProgramNV,PFNGLBINDPROGRAMNVPROC,"glBindProgramNV");
SAFE_GET_PROC (qglDeleteProgramsNV,PFNGLDELETEPROGRAMSNVPROC,"glDeleteProgramsNV");
SAFE_GET_PROC (qglExecuteProgramNV,PFNGLEXECUTEPROGRAMNVPROC,"glExecuteProgramNV");
SAFE_GET_PROC (qglGenProgramsNV,PFNGLGENPROGRAMSNVPROC,"glGenProgramsNV");
SAFE_GET_PROC (qglGetProgramParameterdvNV,PFNGLGETPROGRAMPARAMETERDVNVPROC,"glGetProgramParameterdvNV");
SAFE_GET_PROC (qglGetProgramParameterfvNV,PFNGLGETPROGRAMPARAMETERFVNVPROC,"glGetProgramParameterfvNV");
SAFE_GET_PROC (qglGetProgramivNV,PFNGLGETPROGRAMIVNVPROC,"glGetProgramivNV");
SAFE_GET_PROC (qglGetProgramStringNV,PFNGLGETPROGRAMSTRINGNVPROC,"glGetProgramStringNV");
SAFE_GET_PROC (qglGetTrackMatrixivNV,PFNGLGETTRACKMATRIXIVNVPROC,"glGetTrackMatrixivNV");
SAFE_GET_PROC (qglGetVertexAttribdvNV,PFNGLGETVERTEXATTRIBDVNVPROC,"glGetVertexAttribdvNV");
SAFE_GET_PROC (qglGetVertexAttribfvNV,PFNGLGETVERTEXATTRIBFVNVPROC,"glGetVertexAttribfvNV");
SAFE_GET_PROC (qglGetVertexAttribivNV,PFNGLGETVERTEXATTRIBIVNVPROC,"glGetVertexAttribivNV");
SAFE_GET_PROC (qglGetVertexAttribPointervNV,PFNGLGETVERTEXATTRIBPOINTERVNVPROC,"glGetVertexAttribPointervNV");
SAFE_GET_PROC (qglGetVertexAttribPointervNV,PFNGLGETVERTEXATTRIBPOINTERVNVPROC,"glGetVertexAttribPointerNV");
SAFE_GET_PROC (qglIsProgramNV,PFNGLISPROGRAMNVPROC,"glIsProgramNV");
SAFE_GET_PROC (qglLoadProgramNV,PFNGLLOADPROGRAMNVPROC,"glLoadProgramNV");
SAFE_GET_PROC (qglProgramParameter4dNV,PFNGLPROGRAMPARAMETER4DNVPROC,"glProgramParameter4dNV");
SAFE_GET_PROC (qglProgramParameter4dvNV,PFNGLPROGRAMPARAMETER4DVNVPROC,"glProgramParameter4dvNV");
SAFE_GET_PROC (qglProgramParameter4fNV,PFNGLPROGRAMPARAMETER4FNVPROC,"glProgramParameter4fNV");
SAFE_GET_PROC (qglProgramParameter4fvNV,PFNGLPROGRAMPARAMETER4FVNVPROC,"glProgramParameter4fvNV");
SAFE_GET_PROC (qglProgramParameters4dvNV,PFNGLPROGRAMPARAMETERS4DVNVPROC,"glProgramParameters4dvNV");
SAFE_GET_PROC (qglProgramParameters4fvNV,PFNGLPROGRAMPARAMETERS4FVNVPROC,"glProgramParameters4fvNV");
SAFE_GET_PROC (qglRequestResidentProgramsNV,PFNGLREQUESTRESIDENTPROGRAMSNVPROC,"glRequestResidentProgramsNV");
SAFE_GET_PROC (qglTrackMatrixNV,PFNGLTRACKMATRIXNVPROC,"glTrackMatrixNV");
//default to trilinear filtering on gf3
gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
gl_filter_max = GL_LINEAR;
}
}
//program wide pointer to the allocated agp mem block
void *AGP_Buffer;
void CheckVertexArrayRange(void)
{
/*
if (strstr(gl_extensions, "GL_NV_vertex_array_range"))
{
//get VAR pointers
SAFE_GET_PROC (glFlushVertexArrayRangeNV, PFNGLFLUSHVERTEXARRAYRANGENVPROC, "glFlushVertexArrayRangeNV");
SAFE_GET_PROC (glVertexArrayRangeNV, PFNGLVERTEXARRAYRANGENVPROC, "glVertexArrayRangeNV");
SAFE_GET_PROC (wglAllocateMemoryNV, PFNWGLALLOCATEMEMORYNVPROC, "wglAllocateMemoryNV");
SAFE_GET_PROC (wglFreeMemoryNV, PFNWGLFREEMEMORYNVPROC, "wglFreeMemoryNV");
if (wglAllocateMemoryNV != NULL) {
AGP_Buffer = wglAllocateMemoryNV(AGP_BUFFER_SIZE, 0.0, 0.0, 0.85);
if (AGP_Buffer) {
Con_Printf("Using %ikb AGP mem.\n",AGP_BUFFER_SIZE/1024);
gl_var = true;
} else {
Con_Printf("Failed to allocate %ikb AGP mem.\n",AGP_BUFFER_SIZE/1024);
gl_var = false;
}
}
} else {
*/
gl_var = false;
// }
}
/*
PA: if we have these we draw optimized
*/
void CheckRadeonExtensions(void)
{
int supportedTmu;
glGetIntegerv(GL_MAX_ACTIVE_TEXTURES_ARB,&supportedTmu);
if (strstr(gl_extensions, "GL_EXT_texture3D")
&& (supportedTmu >= 4) && (!COM_CheckParm ("-forcegeneric"))
&& strstr(gl_extensions, "GL_ATI_fragment_shader")
&& strstr(gl_extensions, "GL_EXT_vertex_shader"))
{
Con_Printf("Using Radeon path.\n");
gl_cardtype = RADEON;
//get TEX3d pointers
SAFE_GET_PROC (qglTexImage3DEXT,PFNGLTEXIMAGE3DEXT,"glTexImage3DEXT");
//default to trilinear filtering on Radeon
gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
gl_filter_max = GL_LINEAR;
GL_CreateShadersRadeon();
}
}
void CheckParheliaExtensions(void)
{
int supportedTmu;
glGetIntegerv(GL_MAX_ACTIVE_TEXTURES_ARB,&supportedTmu);
if (strstr(gl_extensions, "GL_EXT_texture3D")
&& (supportedTmu >= 4) && (COM_CheckParm ("-forceparhelia"))
&& strstr(gl_extensions, "GL_MTX_fragment_shader")
&& strstr(gl_extensions, "GL_EXT_vertex_shader"))
{
gl_cardtype = PARHELIA;
//get TEX3d pointers
SAFE_GET_PROC (qglTexImage3DEXT,PFNGLTEXIMAGE3DEXT,"glTexImage3DEXT");
//default to trilinear filtering on Parhelia
gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
gl_filter_max = GL_LINEAR;
GL_CreateShadersParhelia();
}
}
void CheckARBFragmentExtensions(void)
{
int supportedTmu;
glGetIntegerv(GL_MAX_ACTIVE_TEXTURES_ARB,&supportedTmu);
if (strstr(gl_extensions, "GL_EXT_texture3D")
&& (supportedTmu >= 6) && (!COM_CheckParm ("-forcegeneric"))
&& (!COM_CheckParm ("-noarb"))
&& strstr(gl_extensions, "GL_ARB_fragment_program")
&& strstr(gl_extensions, "GL_ARB_vertex_program"))
{
gl_cardtype = ARB;
//get TEX3d poiters wlgGetProcAddress
SAFE_GET_PROC (qglTexImage3DEXT,PFNGLTEXIMAGE3DEXT,"glTexImage3DEXT");
//default to trilinear filtering
gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
gl_filter_max = GL_LINEAR;
GL_CreateShadersARB();
}
}
void CheckAnisotropicExtension(void)
{
if (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") &&
( COM_CheckParm ("-anisotropic") || COM_CheckParm ("-anisotropy")) )
{
GLfloat maxanisotropy;
if ( COM_CheckParm ("-anisotropy"))
gl_textureanisotropylevel = Q_atoi(com_argv[COM_CheckParm("-anisotropy")+1]);
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxanisotropy);
if ( gl_textureanisotropylevel > maxanisotropy )
gl_textureanisotropylevel = maxanisotropy;
if ( gl_textureanisotropylevel < 1.0f )
gl_textureanisotropylevel = 1.0f;
Con_Printf("Anisotropic texture filter level %.0f\n",
gl_textureanisotropylevel);
gl_texturefilteranisotropic = true;
}
}
void CheckTextureCompressionExtension(void)
{
if (strstr(gl_extensions, "GL_ARB_texture_compression") )
{
Con_Printf("Texture compression available\n");
gl_texcomp = true;
}
}
/*
===============
GL_Init
===============
*/
void GL_Init (void)
{
int supportedTmu;
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);
Con_Printf ("%s %s\n", gl_renderer, gl_version);
if (Q_strncasecmp ((char *)gl_renderer,"PowerVR",7)==0)
fullsbardraw = true;
if (Q_strncasecmp ((char *)gl_renderer,"Permedia",8)==0)
isPermedia = true;
Con_Printf ("Checking paletted texture\n");
CheckPalettedTexture ();
Con_Printf ("Checking multitexture\n");
CheckMultiTextureExtensions ();
Con_Printf ("Checking diffuse bumpmap extensions\n");
CheckDiffuseBumpMappingExtensions ();
Con_Printf ("Checking ARB extensions\n");
CheckARBFragmentExtensions ();
if ( gl_cardtype != ARB )
{
Con_Printf ("Checking GeForce 1/2/4-MX\n");
CheckSpecularBumpMappingExtensions ();
Con_Printf ("Checking GeForce 3/4\n");
CheckGeforce3Extensions ();
Con_Printf ("Checking Radeon 8500+\n");
CheckRadeonExtensions ();
Con_Printf ("Checking Parhelia\n");
CheckParheliaExtensions ();
}
Con_Printf ("Checking VAR\n");
CheckVertexArrayRange ();
Con_Printf ("Checking AF\n");
CheckAnisotropicExtension ();
Con_Printf ("Checking TC\n");
CheckTextureCompressionExtension ();
switch (gl_cardtype)
{
case GENERIC:
Con_Printf ("Using generic path.\n");
break;
case GEFORCE:
Con_Printf ("Using GeForce 1/2/4-MX path\n");
break;
case GEFORCE3:
Con_Printf ("Using GeForce 3/4 path\n");
break;
case RADEON:
Con_Printf ("Using Radeon path.\n");
break;
case PARHELIA:
Con_Printf ("Using Parhelia path.\n");
break;
case ARB:
Con_Printf ("Using ARB_fragment_program path.\n");
break;
}
glGetIntegerv (GL_MAX_ACTIVE_TEXTURES_ARB,&supportedTmu);
Con_Printf ("%i texture units\n",supportedTmu);
//PENTA: enable mlook by default, people kept mailing me about how to do mlook
Cbuf_AddText ("+mlook");
glClearColor (0.5,0.5,0.5,0.5);
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);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
#if 0
CheckArrayExtensions ();
glEnable (GL_VERTEX_ARRAY_EXT);
glEnable (GL_TEXTURE_COORD_ARRAY_EXT);
glVertexPointerEXT (3, GL_FLOAT, 0, 0, &glv.x);
glTexCoordPointerEXT (2, GL_FLOAT, 0, 0, &glv.s);
glColorPointerEXT (3, GL_FLOAT, 0, 0, &glv.r);
#endif
}
qboolean VID_Is8bit() {
return is8bit;
}
#define GL_SHARED_TEXTURE_PALETTE_EXT 0x81FB
void VID_Init8bitPalette(void)
{
// Check for 8bit Extensions and initialize them.
int i;
if (COM_CheckParm ("-no8bit"))
return;
SAFE_GET_PROC (qglColorTableEXT,GLCOLORTABLEEXTPFN,"glColorTableEXT");
if (strstr (gl_extensions, "GL_EXT_shared_texture_palette") && qglColorTableEXT )
{
char thePalette[256*3];
char *oldPalette, *newPalette;
Con_SafePrintf("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++;
}
qglColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (void *) thePalette);
is8bit = true;
}
/*
// 3DFX stuff
else if (strstr (gl_extensions, "3DFX_set_global_palette")
&& (SAFE_GET_PROC (qgl3DfxSetPaletteEXT,GL3DFXSETPALETTEEXTPFN,"gl3DfxSetPaletteEXT")!= NULL)) {
GLubyte table[256][4];
char *oldpal;
Con_SafePrintf ("8-bit GL extensions enabled.\n");
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++;
}
qgl3DfxSetPaletteEXT ((GLuint *)table);
is8bit = true;
}
*/
}
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