mirror of https://github.com/ZDoom/raze-gles.git
343 lines
20 KiB
C
343 lines
20 KiB
C
#ifdef USE_OPENGL
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#ifdef RENDERTYPEWIN
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#endif
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// Tell gl.h to not include glext.h, we'll include our own copy in a minute
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#define GL_GLEXT_LEGACY
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#if defined(__APPLE__)
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# include <OpenGL/gl.h>
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# include <OpenGL/glu.h>
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#else
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# include <GL/gl.h>
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# include <GL/glu.h>
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#endif
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// get this header from http://oss.sgi.com/projects/ogl-sample/registry/
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// if you are missing it
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//#include <GL/glext.h>
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#if defined(__APPLE__)
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# include <OpenGL/glext.h>
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#else
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# include "glext.h"
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#endif
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#ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT
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#error You should get an updated copy of glext.h from http://oss.sgi.com/projects/ogl-sample/registry/
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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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# ifdef _WIN32
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# define PR_CALLBACK __stdcall
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# else
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# define PR_CALLBACK
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# endif
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// those defines are somehow missing from glext.h
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#define GL_FRAMEBUFFER_EXT 0x8D40
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#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
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#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
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#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
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#define GL_TEXTURE_RECTANGLE 0x84F5
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extern void (APIENTRY * bglClearColor)( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha );
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extern void (APIENTRY * bglClear)( GLbitfield mask );
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extern void (APIENTRY * bglColorMask)( GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha );
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extern void (APIENTRY * bglAlphaFunc)( GLenum func, GLclampf ref );
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extern void (APIENTRY * bglBlendFunc)( GLenum sfactor, GLenum dfactor );
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extern void (APIENTRY * bglCullFace)( GLenum mode );
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extern void (APIENTRY * bglFrontFace)( GLenum mode );
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extern void (APIENTRY * bglPolygonOffset)( GLfloat factor, GLfloat units );
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extern void (APIENTRY * bglPolygonMode)( GLenum face, GLenum mode );
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extern void (APIENTRY * bglEnable)( GLenum cap );
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extern void (APIENTRY * bglDisable)( GLenum cap );
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extern void (APIENTRY * bglGetDoublev)( GLenum pname, GLdouble *params );
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extern void (APIENTRY * bglGetFloatv)( GLenum pname, GLfloat *params );
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extern void (APIENTRY * bglGetIntegerv)( GLenum pname, GLint *params );
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extern void (APIENTRY * bglPushAttrib)( GLbitfield mask );
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extern void (APIENTRY * bglPopAttrib)( void );
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extern GLenum (APIENTRY * bglGetError)( void );
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extern const GLubyte* (APIENTRY * bglGetString)( GLenum name );
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extern void (APIENTRY * bglHint)( GLenum target, GLenum mode );
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extern void (APIENTRY * bglDrawBuffer)(GLenum mode);
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extern void (APIENTRY * bglReadBuffer)(GLenum mode);
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extern void (APIENTRY * bglScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
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extern void (APIENTRY * bglClipPlane)(GLenum plane, const GLdouble *equation);
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// Depth
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extern void (APIENTRY * bglDepthFunc)( GLenum func );
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extern void (APIENTRY * bglDepthMask)( GLboolean flag );
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extern void (APIENTRY * bglDepthRange)( GLclampd near_val, GLclampd far_val );
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// Matrix
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extern void (APIENTRY * bglMatrixMode)( GLenum mode );
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extern void (APIENTRY * bglOrtho)( GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val );
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extern void (APIENTRY * bglFrustum)( GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val );
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extern void (APIENTRY * bglViewport)( GLint x, GLint y, GLsizei width, GLsizei height );
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extern void (APIENTRY * bglPushMatrix)( void );
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extern void (APIENTRY * bglPopMatrix)( void );
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extern void (APIENTRY * bglLoadIdentity)( void );
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extern void (APIENTRY * bglLoadMatrixf)( const GLfloat *m );
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extern void (APIENTRY * bglLoadMatrixd)( const GLdouble *m );
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extern void (APIENTRY * bglMultMatrixf)( const GLfloat *m );
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extern void (APIENTRY * bglMultMatrixd)( const GLdouble *m );
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extern void (APIENTRY * bglRotatef)(GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
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extern void (APIENTRY * bglScalef)(GLfloat x, GLfloat y, GLfloat z);
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extern void (APIENTRY * bglTranslatef)(GLfloat x, GLfloat y, GLfloat z);
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// Drawing
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extern void (APIENTRY * bglBegin)( GLenum mode );
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extern void (APIENTRY * bglEnd)( void );
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extern void (APIENTRY * bglVertex2f)( GLfloat x, GLfloat y );
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extern void (APIENTRY * bglVertex2i)( GLint x, GLint y );
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extern void (APIENTRY * bglVertex3f)( GLfloat x, GLfloat y, GLfloat z );
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extern void (APIENTRY * bglVertex3d)( GLdouble x, GLdouble y, GLdouble z );
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extern void (APIENTRY * bglVertex3fv)( const GLfloat *v );
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extern void (APIENTRY * bglVertex3dv)( const GLdouble *v );
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extern void (APIENTRY * bglColor4f)( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha );
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extern void (APIENTRY * bglColor4ub)( GLubyte red, GLubyte green, GLubyte blue, GLubyte alpha );
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extern void (APIENTRY * bglTexCoord2d)( GLdouble s, GLdouble t );
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extern void (APIENTRY * bglTexCoord2f)( GLfloat s, GLfloat t );
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extern void (APIENTRY * bglTexCoord2i)( GLint s, GLint t );
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extern void (APIENTRY * bglNormal3f)( GLfloat x, GLfloat y, GLfloat z );
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// Lighting
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extern void (APIENTRY * bglShadeModel)( GLenum mode );
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extern void (APIENTRY * bglLightfv)( GLenum light, GLenum pname, const GLfloat * params );
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// Raster funcs
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extern void (APIENTRY * bglReadPixels)( GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels );
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extern void (APIENTRY * bglRasterPos4i)( GLint x, GLint y, GLint z, GLint w );
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extern void (APIENTRY * bglDrawPixels)( GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels );
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// Texture mapping
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extern void (APIENTRY * bglTexEnvf)( GLenum target, GLenum pname, GLfloat param );
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extern void (APIENTRY * bglGenTextures)( GLsizei n, GLuint *textures ); // 1.1
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extern void (APIENTRY * bglDeleteTextures)( GLsizei n, const GLuint *textures); // 1.1
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extern void (APIENTRY * bglBindTexture)( GLenum target, GLuint texture ); // 1.1
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extern void (APIENTRY * bglTexImage2D)( GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels );
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extern void (APIENTRY * bglTexImage3D)(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
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extern void (APIENTRY * bglCopyTexImage2D)( GLenum target, GLint level, GLenum internalFormat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border );
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extern void (APIENTRY * bglCopyTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
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extern void (APIENTRY * bglTexSubImage2D)( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels ); // 1.1
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extern void (APIENTRY * bglTexParameterf)( GLenum target, GLenum pname, GLfloat param );
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extern void (APIENTRY * bglTexParameteri)( GLenum target, GLenum pname, GLint param );
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extern void (APIENTRY * bglGetTexLevelParameteriv)( GLenum target, GLint level, GLenum pname, GLint *params );
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extern void (APIENTRY * bglCompressedTexImage2DARB)(GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, const GLvoid *);
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extern void (APIENTRY * bglGetCompressedTexImageARB)(GLenum, GLint, GLvoid *);
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extern void (APIENTRY * bglTexGenfv)(GLenum coord, GLenum pname, const GLfloat *params);
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// Fog
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extern void (APIENTRY * bglFogf)( GLenum pname, GLfloat param );
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extern void (APIENTRY * bglFogi)( GLenum pname, GLint param );
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extern void (APIENTRY * bglFogfv)( GLenum pname, const GLfloat *params );
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// Display Lists
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extern void (APIENTRY * bglNewList)(GLuint list, GLenum mode);
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extern void (APIENTRY * bglEndList)(void);
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extern void (APIENTRY * bglCallList)(GLuint list);
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extern void (APIENTRY * bglDeleteLists)(GLuint list, GLsizei range);
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// Vertex Arrays
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extern void (APIENTRY * bglEnableClientState)(GLenum cap);
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extern void (APIENTRY * bglDisableClientState)(GLenum cap);
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extern void (APIENTRY * bglVertexPointer)(GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
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extern void (APIENTRY * bglNormalPointer)(GLenum type, GLsizei stride, const GLvoid *pointer);
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extern void (APIENTRY * bglTexCoordPointer)(GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
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extern void (APIENTRY * bglDrawArrays)(GLenum mode, GLint first, GLsizei count);
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extern void (APIENTRY * bglDrawElements)(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices);
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// Stencil Buffer
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extern void (APIENTRY * bglClearStencil)(GLint s);
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extern void (APIENTRY * bglStencilOp)(GLenum fail, GLenum zfail, GLenum zpass);
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extern void (APIENTRY * bglStencilFunc)(GLenum func, GLint ref, GLuint mask);
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// GPU Programs
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extern void (APIENTRY * bglGenProgramsARB)(GLsizei, GLuint *);
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extern void (APIENTRY * bglBindProgramARB)(GLenum, GLuint);
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extern void (APIENTRY * bglProgramStringARB)(GLenum, GLenum, GLsizei, const GLvoid *);
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extern void (APIENTRY * bglDeleteProgramsARB)(GLsizei n, const GLuint *programs);
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// Multitexturing
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extern void (APIENTRY * bglActiveTextureARB)(GLenum texture);
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extern void (APIENTRY * bglClientActiveTextureARB)(GLenum texture);
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extern void (APIENTRY * bglMultiTexCoord2dARB)(GLenum target, GLdouble s, GLdouble t );
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extern void (APIENTRY * bglMultiTexCoord2fARB)(GLenum target, GLfloat s, GLfloat t );
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// Frame Buffer Objects
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extern void (APIENTRY * bglGenFramebuffersEXT)(GLsizei n, GLuint *framebuffers);
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extern void (APIENTRY * bglBindFramebufferEXT)(GLenum target, GLuint framebuffer);
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extern void (APIENTRY * bglFramebufferTexture2DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
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extern GLenum (APIENTRY * bglCheckFramebufferStatusEXT)(GLenum target);
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extern void (APIENTRY * bglDeleteFramebuffersEXT)(GLsizei n, const GLuint *framebuffers);
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// Vertex Buffer Objects
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extern void (APIENTRY * bglGenBuffersARB)(GLsizei n, GLuint * buffers);
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extern void (APIENTRY * bglBindBufferARB)(GLenum target, GLuint buffer);
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extern void (APIENTRY * bglDeleteBuffersARB)(GLsizei n, const GLuint * buffers);
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extern void (APIENTRY * bglBufferDataARB)(GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage);
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extern void (APIENTRY * bglBufferSubDataARB)(GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid * data);
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extern void* (APIENTRY * bglMapBufferARB)(GLenum target, GLenum access);
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extern GLboolean (APIENTRY * bglUnmapBufferARB)(GLenum target);
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// Occlusion queries
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extern void (APIENTRY * bglGenQueriesARB)(GLsizei n, GLuint *ids);
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extern void (APIENTRY * bglDeleteQueriesARB)(GLsizei n, const GLuint *ids);
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extern GLboolean (APIENTRY * bglIsQueryARB)(GLuint id);
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extern void (APIENTRY * bglBeginQueryARB)(GLenum target, GLuint id);
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extern void (APIENTRY * bglEndQueryARB)(GLenum target);
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extern void (APIENTRY * bglGetQueryivARB)(GLenum target, GLenum pname, GLint *params);
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extern void (APIENTRY * bglGetQueryObjectivARB)(GLuint id, GLenum pname, GLint *params);
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extern void (APIENTRY * bglGetQueryObjectuivARB)(GLuint id, GLenum pname, GLuint *params);
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// Shader Objects
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extern void (APIENTRY * bglDeleteObjectARB)(GLhandleARB);
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extern GLhandleARB (APIENTRY * bglGetHandleARB)(GLenum);
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extern void (APIENTRY * bglDetachObjectARB)(GLhandleARB, GLhandleARB);
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extern GLhandleARB (APIENTRY * bglCreateShaderObjectARB)(GLenum);
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extern void (APIENTRY * bglShaderSourceARB)(GLhandleARB, GLsizei, const GLcharARB* *, const GLint *);
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extern void (APIENTRY * bglCompileShaderARB)(GLhandleARB);
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extern GLhandleARB (APIENTRY * bglCreateProgramObjectARB)(void);
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extern void (APIENTRY * bglAttachObjectARB)(GLhandleARB, GLhandleARB);
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extern void (APIENTRY * bglLinkProgramARB)(GLhandleARB);
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extern void (APIENTRY * bglUseProgramObjectARB)(GLhandleARB);
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extern void (APIENTRY * bglValidateProgramARB)(GLhandleARB);
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extern void (APIENTRY * bglUniform1fARB)(GLint, GLfloat);
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extern void (APIENTRY * bglUniform2fARB)(GLint, GLfloat, GLfloat);
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extern void (APIENTRY * bglUniform3fARB)(GLint, GLfloat, GLfloat, GLfloat);
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extern void (APIENTRY * bglUniform4fARB)(GLint, GLfloat, GLfloat, GLfloat, GLfloat);
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extern void (APIENTRY * bglUniform1iARB)(GLint, GLint);
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extern void (APIENTRY * bglUniform2iARB)(GLint, GLint, GLint);
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extern void (APIENTRY * bglUniform3iARB)(GLint, GLint, GLint, GLint);
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extern void (APIENTRY * bglUniform4iARB)(GLint, GLint, GLint, GLint, GLint);
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extern void (APIENTRY * bglUniform1fvARB)(GLint, GLsizei, const GLfloat *);
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extern void (APIENTRY * bglUniform2fvARB)(GLint, GLsizei, const GLfloat *);
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extern void (APIENTRY * bglUniform3fvARB)(GLint, GLsizei, const GLfloat *);
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extern void (APIENTRY * bglUniform4fvARB)(GLint, GLsizei, const GLfloat *);
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extern void (APIENTRY * bglUniform1ivARB)(GLint, GLsizei, const GLint *);
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extern void (APIENTRY * bglUniform2ivARB)(GLint, GLsizei, const GLint *);
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extern void (APIENTRY * bglUniform3ivARB)(GLint, GLsizei, const GLint *);
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extern void (APIENTRY * bglUniform4ivARB)(GLint, GLsizei, const GLint *);
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extern void (APIENTRY * bglUniformMatrix2fvARB)(GLint, GLsizei, GLboolean, const GLfloat *);
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extern void (APIENTRY * bglUniformMatrix3fvARB)(GLint, GLsizei, GLboolean, const GLfloat *);
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extern void (APIENTRY * bglUniformMatrix4fvARB)(GLint, GLsizei, GLboolean, const GLfloat *);
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extern void (APIENTRY * bglGetObjectParameterfvARB)(GLhandleARB, GLenum, GLfloat *);
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extern void (APIENTRY * bglGetObjectParameterivARB)(GLhandleARB, GLenum, GLint *);
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extern void (APIENTRY * bglGetInfoLogARB)(GLhandleARB, GLsizei, GLsizei *, GLcharARB *);
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extern void (APIENTRY * bglGetAttachedObjectsARB)(GLhandleARB, GLsizei, GLsizei *, GLhandleARB *);
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extern GLint (APIENTRY * bglGetUniformLocationARB)(GLhandleARB, const GLcharARB *);
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extern void (APIENTRY * bglGetActiveUniformARB)(GLhandleARB, GLuint, GLsizei, GLsizei *, GLint *, GLenum *, GLcharARB *);
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extern void (APIENTRY * bglGetUniformfvARB)(GLhandleARB, GLint, GLfloat *);
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extern void (APIENTRY * bglGetUniformivARB)(GLhandleARB, GLint, GLint *);
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extern void (APIENTRY * bglGetShaderSourceARB)(GLhandleARB, GLsizei, GLsizei *, GLcharARB *);
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// Vertex Shaders
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extern void (APIENTRY * bglVertexAttrib1dARB)(GLuint, GLdouble);
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extern void (APIENTRY * bglVertexAttrib1dvARB)(GLuint, const GLdouble *);
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extern void (APIENTRY * bglVertexAttrib1fARB)(GLuint, GLfloat);
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extern void (APIENTRY * bglVertexAttrib1fvARB)(GLuint, const GLfloat *);
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extern void (APIENTRY * bglVertexAttrib1sARB)(GLuint, GLshort);
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extern void (APIENTRY * bglVertexAttrib1svARB)(GLuint, const GLshort *);
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extern void (APIENTRY * bglVertexAttrib2dARB)(GLuint, GLdouble, GLdouble);
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extern void (APIENTRY * bglVertexAttrib2dvARB)(GLuint, const GLdouble *);
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extern void (APIENTRY * bglVertexAttrib2fARB)(GLuint, GLfloat, GLfloat);
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extern void (APIENTRY * bglVertexAttrib2fvARB)(GLuint, const GLfloat *);
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extern void (APIENTRY * bglVertexAttrib2sARB)(GLuint, GLshort, GLshort);
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extern void (APIENTRY * bglVertexAttrib2svARB)(GLuint, const GLshort *);
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extern void (APIENTRY * bglVertexAttrib3dARB)(GLuint, GLdouble, GLdouble, GLdouble);
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extern void (APIENTRY * bglVertexAttrib3dvARB)(GLuint, const GLdouble *);
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extern void (APIENTRY * bglVertexAttrib3fARB)(GLuint, GLfloat, GLfloat, GLfloat);
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extern void (APIENTRY * bglVertexAttrib3fvARB)(GLuint, const GLfloat *);
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extern void (APIENTRY * bglVertexAttrib3sARB)(GLuint, GLshort, GLshort, GLshort);
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extern void (APIENTRY * bglVertexAttrib3svARB)(GLuint, const GLshort *);
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extern void (APIENTRY * bglVertexAttrib4NbvARB)(GLuint, const GLbyte *);
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extern void (APIENTRY * bglVertexAttrib4NivARB)(GLuint, const GLint *);
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extern void (APIENTRY * bglVertexAttrib4NsvARB)(GLuint, const GLshort *);
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extern void (APIENTRY * bglVertexAttrib4NubARB)(GLuint, GLubyte, GLubyte, GLubyte, GLubyte);
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extern void (APIENTRY * bglVertexAttrib4NubvARB)(GLuint, const GLubyte *);
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extern void (APIENTRY * bglVertexAttrib4NuivARB)(GLuint, const GLuint *);
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extern void (APIENTRY * bglVertexAttrib4NusvARB)(GLuint, const GLushort *);
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extern void (APIENTRY * bglVertexAttrib4bvARB)(GLuint, const GLbyte *);
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extern void (APIENTRY * bglVertexAttrib4dARB)(GLuint, GLdouble, GLdouble, GLdouble, GLdouble);
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extern void (APIENTRY * bglVertexAttrib4dvARB)(GLuint, const GLdouble *);
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extern void (APIENTRY * bglVertexAttrib4fARB)(GLuint, GLfloat, GLfloat, GLfloat, GLfloat);
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extern void (APIENTRY * bglVertexAttrib4fvARB)(GLuint, const GLfloat *);
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extern void (APIENTRY * bglVertexAttrib4ivARB)(GLuint, const GLint *);
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extern void (APIENTRY * bglVertexAttrib4sARB)(GLuint, GLshort, GLshort, GLshort, GLshort);
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extern void (APIENTRY * bglVertexAttrib4svARB)(GLuint, const GLshort *);
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extern void (APIENTRY * bglVertexAttrib4ubvARB)(GLuint, const GLubyte *);
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extern void (APIENTRY * bglVertexAttrib4uivARB)(GLuint, const GLuint *);
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extern void (APIENTRY * bglVertexAttrib4usvARB)(GLuint, const GLushort *);
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extern void (APIENTRY * bglVertexAttribPointerARB)(GLuint, GLint, GLenum, GLboolean, GLsizei, const GLvoid *);
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extern void (APIENTRY * bglEnableVertexAttribArrayARB)(GLuint);
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extern void (APIENTRY * bglDisableVertexAttribArrayARB)(GLuint);
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extern void (APIENTRY * bglGetVertexAttribdvARB)(GLuint, GLenum, GLdouble *);
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extern void (APIENTRY * bglGetVertexAttribfvARB)(GLuint, GLenum, GLfloat *);
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extern void (APIENTRY * bglGetVertexAttribivARB)(GLuint, GLenum, GLint *);
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extern void (APIENTRY * bglGetVertexAttribPointervARB)(GLuint, GLenum, GLvoid* *);
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extern void (APIENTRY * bglBindAttribLocationARB)(GLhandleARB, GLuint, const GLcharARB *);
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extern void (APIENTRY * bglGetActiveAttribARB)(GLhandleARB, GLuint, GLsizei, GLsizei *, GLint *, GLenum *, GLcharARB *);
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extern GLint (APIENTRY * bglGetAttribLocationARB)(GLhandleARB, const GLcharARB *);
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// Debug Output
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#ifndef __APPLE__
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extern void (APIENTRY * bglDebugMessageControlARB)(GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
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extern void (APIENTRY * bglDebugMessageCallbackARB)(GLDEBUGPROCARB callback, const GLvoid *userParam);
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#endif
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// GLU
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extern void (APIENTRY * bgluTessBeginContour) (GLUtesselator* tess);
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extern void (APIENTRY * bgluTessBeginPolygon) (GLUtesselator* tess, GLvoid* data);
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extern void (APIENTRY * bgluTessCallback) (GLUtesselator* tess, GLenum which, void (PR_CALLBACK CallBackFunc)());
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extern void (APIENTRY * bgluTessEndContour) (GLUtesselator* tess);
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extern void (APIENTRY * bgluTessEndPolygon) (GLUtesselator* tess);
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extern void (APIENTRY * bgluTessNormal) (GLUtesselator* tess, GLdouble valueX, GLdouble valueY, GLdouble valueZ);
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extern void (APIENTRY * bgluTessProperty) (GLUtesselator* tess, GLenum which, GLdouble data);
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extern void (APIENTRY * bgluTessVertex) (GLUtesselator* tess, GLdouble *location, GLvoid* data);
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extern GLUtesselator* (APIENTRY * bgluNewTess) (void);
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extern void (APIENTRY * bgluDeleteTess) (GLUtesselator* tess);
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extern void (APIENTRY * bgluPerspective) (GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
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extern const GLubyte * (APIENTRY * bgluErrorString) (GLenum error);
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extern GLint (APIENTRY * bgluProject)(GLdouble objX, GLdouble objY, GLdouble objZ, const GLdouble *model, const GLdouble *proj, const GLint *view, GLdouble* winX, GLdouble* winY, GLdouble* winZ);
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extern GLint (APIENTRY * bgluUnProject)(GLdouble winX, GLdouble winY, GLdouble winZ, const GLdouble * model, const GLdouble * proj, const GLint * view, GLdouble* objX, GLdouble* objY, GLdouble* objZ);
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#ifdef RENDERTYPEWIN
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// Windows
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extern HGLRC (WINAPI * bwglCreateContext)(HDC);
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extern BOOL (WINAPI * bwglDeleteContext)(HGLRC);
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extern PROC (WINAPI * bwglGetProcAddress)(LPCSTR);
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extern BOOL (WINAPI * bwglMakeCurrent)(HDC,HGLRC);
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extern BOOL (WINAPI * bwglSwapBuffers)(HDC);
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extern int32_t (WINAPI * bwglChoosePixelFormat)(HDC,CONST PIXELFORMATDESCRIPTOR*);
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extern int32_t (WINAPI * bwglDescribePixelFormat)(HDC,int32_t,UINT,LPPIXELFORMATDESCRIPTOR);
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extern int32_t (WINAPI * bwglGetPixelFormat)(HDC);
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extern BOOL (WINAPI * bwglSetPixelFormat)(HDC,int32_t,const PIXELFORMATDESCRIPTOR*);
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extern BOOL (WINAPI * bwglSwapIntervalEXT)(int32_t);
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extern HGLRC (WINAPI * bwglCreateContextAttribsARB)(HDC hDC, HGLRC hShareContext, const int *attribList);
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#endif
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//////// glGenTextures/glDeleteTextures debugging ////////
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void texdbg_bglGenTextures(GLsizei n, GLuint *textures, const char *srcfn);
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void texdbg_bglDeleteTextures(GLsizei n, const GLuint *textures, const char *srcfn);
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#endif //USE_OPENGL
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extern char *gldriver;
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int32_t loadgldriver(const char *driver);
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int32_t loadglextensions(void);
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int32_t unloadgldriver(void);
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int32_t loadglulibrary(const char *driver);
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int32_t unloadglulibrary(void);
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