glprocs.c

使用stl技术,(还没看,是听说的)

/*
** GLprocs utility for getting function addresses for OpenGL(R) 1.2, 
** OpenGL 1.3 and OpenGL extension functions.
**
** Version:  1.0
**
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
** 
** http://oss.sgi.com/projects/FreeB
** 
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
** 
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
** 
** Additional Notice Provisions: This software was created using the
** OpenGL(R) version 1.2.1 Sample Implementation published by SGI, but has
** not been independently verified as being compliant with the OpenGL(R)
** version 1.2.1 Specification.
**
** Initial version of glprocs.{c,h} contributed by Intel(R) Corporation.
*/

#include <assert.h>
#include <stdlib.h>

#ifdef _WIN32
  #include <windows.h>
  #include <GL/gl.h>  
  #include "glprocs.h"
#else /* GLX */
  #include <GL/gl.h>
  #include <GL/glx.h>
  #include <GL/glprocs.h>
  #define wglGetProcAddress glXGetProcAddresARB
#endif

#define _ASSERT(a) assert(a)

static void APIENTRY InitBlendColor (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glBlendColor");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glBlendColor = extproc;

	glBlendColor(red, green, blue, alpha);
}

static void APIENTRY InitBlendEquation (GLenum mode)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glBlendEquation");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glBlendEquation = extproc;

	glBlendEquation(mode);
}

static void APIENTRY InitDrawRangeElements (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glDrawRangeElements");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glDrawRangeElements = extproc;

	glDrawRangeElements(mode, start, end, count, type, indices);
}

static void APIENTRY InitColorTable (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glColorTable");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glColorTable = extproc;

	glColorTable(target, internalformat, width, format, type, table);
}

static void APIENTRY InitColorTableParameterfv (GLenum target, GLenum pname, const GLfloat *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glColorTableParameterfv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glColorTableParameterfv = extproc;

	glColorTableParameterfv(target, pname, params);
}

static void APIENTRY InitColorTableParameteriv (GLenum target, GLenum pname, const GLint *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glColorTableParameteriv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glColorTableParameteriv = extproc;

	glColorTableParameteriv(target, pname, params);
}

static void APIENTRY InitCopyColorTable (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glCopyColorTable");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glCopyColorTable = extproc;

	glCopyColorTable(target, internalformat, x, y, width);
}

static void APIENTRY InitGetColorTable (GLenum target, GLenum format, GLenum type, GLvoid *table)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetColorTable");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetColorTable = extproc;

	glGetColorTable(target, format, type, table);
}

static void APIENTRY InitGetColorTableParameterfv (GLenum target, GLenum pname, GLfloat *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetColorTableParameterfv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetColorTableParameterfv = extproc;

	glGetColorTableParameterfv(target, pname, params);
}

static void APIENTRY InitGetColorTableParameteriv (GLenum target, GLenum pname, GLint *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetColorTableParameteriv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetColorTableParameteriv = extproc;

	glGetColorTableParameteriv(target, pname, params);
}

static void APIENTRY InitColorSubTable (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glColorSubTable");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glColorSubTable = extproc;

	glColorSubTable(target, start, count, format, type, data);
}

static void APIENTRY InitCopyColorSubTable (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glCopyColorSubTable");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glCopyColorSubTable = extproc;

	glCopyColorSubTable(target, start, x, y, width);
}

static void APIENTRY InitConvolutionFilter1D (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glConvolutionFilter1D");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glConvolutionFilter1D = extproc;

	glConvolutionFilter1D(target, internalformat, width, format, type, image);
}

static void APIENTRY InitConvolutionFilter2D (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glConvolutionFilter2D");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glConvolutionFilter2D = extproc;

	glConvolutionFilter2D(target, internalformat, width, height, format, type, image);
}

static void APIENTRY InitConvolutionParameterf (GLenum target, GLenum pname, GLfloat params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glConvolutionParameterf");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glConvolutionParameterf = extproc;

	glConvolutionParameterf(target, pname, params);
}

static void APIENTRY InitConvolutionParameterfv (GLenum target, GLenum pname, const GLfloat *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glConvolutionParameterfv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glConvolutionParameterfv = extproc;

	glConvolutionParameterfv(target, pname, params);
}

static void APIENTRY InitConvolutionParameteri (GLenum target, GLenum pname, GLint params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glConvolutionParameteri");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glConvolutionParameteri = extproc;

	glConvolutionParameteri(target, pname, params);
}

static void APIENTRY InitConvolutionParameteriv (GLenum target, GLenum pname, const GLint *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glConvolutionParameteriv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glConvolutionParameteriv = extproc;

	glConvolutionParameteriv(target, pname, params);
}

static void APIENTRY InitCopyConvolutionFilter1D (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glCopyConvolutionFilter1D");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glCopyConvolutionFilter1D = extproc;

	glCopyConvolutionFilter1D(target, internalformat, x, y, width);
}

static void APIENTRY InitCopyConvolutionFilter2D (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glCopyConvolutionFilter2D");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glCopyConvolutionFilter2D = extproc;

	glCopyConvolutionFilter2D(target, internalformat, x, y, width, height);
}

static void APIENTRY InitGetConvolutionFilter (GLenum target, GLenum format, GLenum type, GLvoid *image)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetConvolutionFilter");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetConvolutionFilter = extproc;

	glGetConvolutionFilter(target, format, type, image);
}

static void APIENTRY InitGetConvolutionParameterfv (GLenum target, GLenum pname, GLfloat *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetConvolutionParameterfv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetConvolutionParameterfv = extproc;

	glGetConvolutionParameterfv(target, pname, params);
}

static void APIENTRY InitGetConvolutionParameteriv (GLenum target, GLenum pname, GLint *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetConvolutionParameteriv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetConvolutionParameteriv = extproc;

	glGetConvolutionParameteriv(target, pname, params);
}

static void APIENTRY InitGetSeparableFilter (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetSeparableFilter");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetSeparableFilter = extproc;

	glGetSeparableFilter(target, format, type, row, column, span);
}

static void APIENTRY InitSeparableFilter2D (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glSeparableFilter2D");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glSeparableFilter2D = extproc;

	glSeparableFilter2D(target, internalformat, width, height, format, type, row, column);
}

static void APIENTRY InitGetHistogram (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetHistogram");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetHistogram = extproc;

	glGetHistogram(target, reset, format, type, values);
}

static void APIENTRY InitGetHistogramParameterfv (GLenum target, GLenum pname, GLfloat *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetHistogramParameterfv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetHistogramParameterfv = extproc;

	glGetHistogramParameterfv(target, pname, params);
}

static void APIENTRY InitGetHistogramParameteriv (GLenum target, GLenum pname, GLint *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetHistogramParameteriv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetHistogramParameteriv = extproc;

	glGetHistogramParameteriv(target, pname, params);
}

static void APIENTRY InitGetMinmax (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetMinmax");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetMinmax = extproc;

	glGetMinmax(target, reset, format, type, values);
}

static void APIENTRY InitGetMinmaxParameterfv (GLenum target, GLenum pname, GLfloat *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetMinmaxParameterfv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetMinmaxParameterfv = extproc;

	glGetMinmaxParameterfv(target, pname, params);
}

static void APIENTRY InitGetMinmaxParameteriv (GLenum target, GLenum pname, GLint *params)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glGetMinmaxParameteriv");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glGetMinmaxParameteriv = extproc;

	glGetMinmaxParameteriv(target, pname, params);
}

static void APIENTRY InitHistogram (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glHistogram");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glHistogram = extproc;

	glHistogram(target, width, internalformat, sink);
}

static void APIENTRY InitMinmax (GLenum target, GLenum internalformat, GLboolean sink)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glMinmax");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glMinmax = extproc;

	glMinmax(target, internalformat, sink);
}

static void APIENTRY InitResetHistogram (GLenum target)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glResetHistogram");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}

	glResetHistogram = extproc;

	glResetHistogram(target);
}

static void APIENTRY InitResetMinmax (GLenum target)
{
	void *extproc;

	extproc = (void *) wglGetProcAddress("glResetMinmax");

	if (extproc == NULL) {
		_ASSERT(0);
		return;
	}