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raze/polymer/eduke32/build/include/glbuild.h
helixhorned 7e9b2eae0f * Clean up after myself. It seems that Polymost isn't very clean with handling texture IDs sometimes, so switching between the two GL renderers could mess them up with the last revision. This is fixed now by always uninitializing Polymer when changing from it to another renderer. 
* New shade/visibility calculation code, which is activated with 'r_usenewshading' (on by default), and is closer to the classic look. Also tweak the FOGSCALE macro to have approximately the same fog distance with all renderers.

* Mapster32: END modifier to RShift. If it's pressed when RShift is released, sprites which are in grayed out sectors are also selected;  Make changing shade affect all highlighted sprites in 3D mode (when aiming at one of them).

* some debug code to watch out for suspicious glGenTexture/glDeleteTextures calls, not active.


git-svn-id: https://svn.eduke32.com/eduke32@1943 1a8010ca-5511-0410-912e-c29ae57300e0
2011-07-24 15:15:57 +00:00

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