diff options
Diffstat (limited to 'auto/src/glew_init_wgl.c')
-rw-r--r-- | auto/src/glew_init_wgl.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/auto/src/glew_init_wgl.c b/auto/src/glew_init_wgl.c new file mode 100644 index 0000000..cc731fe --- /dev/null +++ b/auto/src/glew_init_wgl.c @@ -0,0 +1,45 @@ +/* ------------------------------------------------------------------------- */ + +static PFNWGLGETEXTENSIONSSTRINGARBPROC _wglewGetExtensionsStringARB = NULL; +static PFNWGLGETEXTENSIONSSTRINGEXTPROC _wglewGetExtensionsStringEXT = NULL; + +GLboolean GLEWAPIENTRY wglewGetExtension (const char* name) +{ + const GLubyte* start; + const GLubyte* end; + if (_wglewGetExtensionsStringARB == NULL) + if (_wglewGetExtensionsStringEXT == NULL) + return GL_FALSE; + else + start = (const GLubyte*)_wglewGetExtensionsStringEXT(); + else + start = (const GLubyte*)_wglewGetExtensionsStringARB(wglGetCurrentDC()); + if (start == 0) + return GL_FALSE; + end = start + _glewStrLen(start); + return _glewSearchExtension(name, start, end); +} + +#ifdef GLEW_MX +GLenum GLEWAPIENTRY wglewContextInit (WGLEW_CONTEXT_ARG_DEF_LIST) +#else +GLenum GLEWAPIENTRY wglewInit (WGLEW_CONTEXT_ARG_DEF_LIST) +#endif +{ + GLboolean crippled; + const GLubyte* extStart; + const GLubyte* extEnd; + /* find wgl extension string query functions */ + _wglewGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)glewGetProcAddress((const GLubyte*)"wglGetExtensionsStringARB"); + _wglewGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)glewGetProcAddress((const GLubyte*)"wglGetExtensionsStringEXT"); + /* query wgl extension string */ + if (_wglewGetExtensionsStringARB == NULL) + if (_wglewGetExtensionsStringEXT == NULL) + extStart = (const GLubyte*)""; + else + extStart = (const GLubyte*)_wglewGetExtensionsStringEXT(); + else + extStart = (const GLubyte*)_wglewGetExtensionsStringARB(wglGetCurrentDC()); + extEnd = extStart + _glewStrLen(extStart); + /* initialize extensions */ + crippled = _wglewGetExtensionsStringARB == NULL && _wglewGetExtensionsStringEXT == NULL; |