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