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/*************************************************************
* *
* file : EXT_paletted_texture.h *
* author: Jens Schneider *
* date : 14.Mar.2001-10.Jul.2001 *
* e-mail: jens@glHint.de *
* *
* version 1.0ß *
* *
*************************************************************/
#ifndef __EXT_paletted_texture_H_
#define __EXT_paletted_texture_H_
/*
* GLOBAL SWITCHES - enable/disable advanced features of this header
*
*/
#define EXT_PALETTED_TEXTURE_INITIALIZE 1 // enable generic init-routines
#ifndef _WIN32
#define GL_GLEXT_PROTOTYPES 1
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__)
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#endif
#ifndef APIENTRY
#define APIENTRY
#endif
// Header file version number, required by OpenGL ABI for Linux
#define GL_GLEXT_VERSION 7
/*
* NEW TOKENS TO OPENGL 1.2.1
*
*/
#ifndef GL_EXT_paletted_texture
#define GL_COLOR_INDEX1_EXT 0x80E2
#define GL_COLOR_INDEX2_EXT 0x80E3
#define GL_COLOR_INDEX4_EXT 0x80E4
#define GL_COLOR_INDEX8_EXT 0x80E5
#define GL_COLOR_INDEX12_EXT 0x80E6
#define GL_COLOR_INDEX16_EXT 0x80E7
#define GL_COLOR_TABLE_FORMAT_EXT 0x80D8
#define GL_COLOR_TABLE_WIDTH_EXT 0x80D9
#define GL_COLOR_TABLE_RED_SIZE_EXT 0x80DA
#define GL_COLOR_TABLE_GREEN_SIZE_EXT 0x80DB
#define GL_COLOR_TABLE_BLUE_SIZE_EXT 0x80DC
#define GL_COLOR_TABLE_ALPHA_SIZE_EXT 0x80DD
#define GL_COLOR_TABLE_LUMINANCE_SIZE_EXT 0x80DE
#define GL_COLOR_TABLE_INTENSITY_SIZE_EXT 0x80DF
#define GL_TEXTURE_INDEX_SIZE_EXT 0x80ED
#define GL_EXT_paletted_texture 1
#endif
#ifndef _WIN32
#ifdef GL_GLEXT_PROTOTYPES
extern void APIENTRY glColorTableEXT (GLenum, GLenum, GLsizei, GLenum, GLenum, const GLvoid *);
extern void APIENTRY glColorSubTableEXT(GLenum, GLsizei, GLsizei, GLenum, GLenum, const GLvoid *);
extern void APIENTRY glGetColorTableEXT(GLenum, GLenum, GLenum, GLvoid *);
extern void APIENTRY glGetColorTableParameterivEXT(GLenum, GLenum, GLint *);
extern void APIENTRY glGetColorTableParameterfvEXT(GLenum, GLenum, GLfloat *);
#endif // GL_GLEXT_PROTOTYPES
#else // _WIN32
typedef void (APIENTRY * PFNGLCOLORTABLEEXTPROC) (GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *data);
typedef void (APIENTRY * PFNGLCOLORSUBTABLEEXTPROC)(GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
typedef void (APIENTRY * PFNGLGETCOLORTABLEEXTPROC)(GLenum target, GLenum format, GLenum type, GLvoid *data);
typedef void (APIENTRY * PFNGLGETCOLORTABLEPARAMETERIVEXTPROC)(GLenum target, GLenum pname, GLint *params);
typedef void (APIENTRY * PFNGLGETCOLORTABLEPARAMETERFVEXTPROC)(GLenum target, GLenum pname, GLfloat *params);
#endif // not _WIN32
#ifdef EXT_PALETTED_TEXTURE_INITIALIZE
#include<string.h> // string manipulation for runtime-check
#ifdef _WIN32
PFNGLCOLORTABLEEXTPROC glColorTableEXT = NULL;
PFNGLCOLORSUBTABLEEXTPROC glColorSubTableEXT = NULL;
PFNGLGETCOLORTABLEEXTPROC glGetColorTableEXT = NULL;
PFNGLGETCOLORTABLEPARAMETERIVEXTPROC glGetColorTableParameterivEXT = NULL;
PFNGLGETCOLORTABLEPARAMETERFVEXTPROC glGetColorTableParameterfvEXT = NULL;
#endif // _WIN32
int CheckForEXTPalettedTextureSupport(void) {
const char search[]="GL_EXT_paletted_texture";
int i, pos=0;
int maxpos=strlen(search)-1;
char extensions[10000];
strcpy(extensions,(const char *)glGetString(GL_EXTENSIONS));
int len=strlen(extensions);
for (i=0; i<len; i++) {
if ((i==0) || ((i>1) && extensions[i-1]==' ')) {
pos=0;
while(extensions[i]!=' ') {
if (extensions[i]==search[pos]) pos++;
if ((pos>maxpos) && extensions[i+1]==' ') {
//printf(search);
//printf(" supported.\n");
return 1;
}
i++;
}
}
}
//printf(search);
//printf(" not supported.\n");
return 0;
}
int GL_EXT_paletted_texture_Init(void) {
if (!CheckForEXTPalettedTextureSupport()) return 0;
#ifdef _WIN32
glColorTableEXT = (PFNGLCOLORTABLEEXTPROC) wglGetProcAddress("glColorTableEXT");
if (glColorTableEXT==NULL) {fprintf(stderr,"glColorTableEXT not found.\n"); return 0;}
glColorSubTableEXT = (PFNGLCOLORSUBTABLEEXTPROC) wglGetProcAddress("glColorSubTableEXT");
if (glColorSubTableEXT==NULL) {fprintf(stderr,"glColorSubTableEXT not found.\n"); return 0;}
glGetColorTableEXT = (PFNGLGETCOLORTABLEEXTPROC) wglGetProcAddress("glGetColorTableEXT");
if (glGetColorTableEXT==NULL) {fprintf(stderr,"glGetColorTableEXT not found.\n"); return 0;}
glGetColorTableParameterivEXT = (PFNGLGETCOLORTABLEPARAMETERIVEXTPROC) wglGetProcAddress("glGetColorTableParameterivEXT");
if (glGetColorTableParameterivEXT==NULL) {fprintf(stderr,"glGetColorTableParameterivEXT not found.\n"); return 0;}
glGetColorTableParameterfvEXT = (PFNGLGETCOLORTABLEPARAMETERFVEXTPROC) wglGetProcAddress("glGetColorTableParameterfvEXT");
if (glGetColorTableParameterfvEXT==NULL) {fprintf(stderr,"glGetColorTableParameterfvEXT not found.\n"); return 0;}
#endif // _WIN32
return 1;
}
#endif // EXT_PALETTED_TEXTURE_INITIALIZE
#ifdef __cplusplus
}
#endif
#endif // not __EXT_PALETTED_TEXTURE_H_
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