bool GLGraphics::wglExtensionSupported(const char *extension_name)
{
// this is pointer to function which returns pointer to string with list of all wgl extensions
PFNWGLGETEXTENSIONSSTRINGEXTPROC _wglGetExtensionsStringEXT = NULL;
// determine pointer to wglGetExtensionsStringEXT function
_wglGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)wglGetProcAddress("wglGetExtensionsStringEXT");
if (strstr(_wglGetExtensionsStringEXT(), extension_name) == NULL)
{
// string was not found
return false;
}
// extension is supported
return true;
}
int _glfwPlatformExtensionSupported( const char *extension )
{
const GLubyte *extensions;
WGLGETEXTENSIONSSTRINGEXT_T _wglGetExtensionsStringEXT;
WGLGETEXTENSIONSSTRINGARB_T _wglGetExtensionsStringARB;
// Try wglGetExtensionsStringEXT
_wglGetExtensionsStringEXT = (WGLGETEXTENSIONSSTRINGEXT_T)
wglGetProcAddress( "wglGetExtensionsStringEXT" );
if( _wglGetExtensionsStringEXT != NULL )
{
extensions = (GLubyte *) _wglGetExtensionsStringEXT();
if( extensions != NULL )
{
if( _glfwStringInExtensionString( extension, extensions ) )
{
return GL_TRUE;
}
}
}
// Try wglGetExtensionsStringARB
_wglGetExtensionsStringARB = (WGLGETEXTENSIONSSTRINGARB_T)
wglGetProcAddress( "wglGetExtensionsStringARB" );
if( _wglGetExtensionsStringARB != NULL )
{
extensions = (GLubyte *) _wglGetExtensionsStringARB(_glfwWin.DC);
if( extensions != NULL )
{
if( _glfwStringInExtensionString( extension, extensions ) )
{
return GL_TRUE;
}
}
}
return GL_FALSE;
}
bool GLApp::WGLExtSupported(std::string extName)
{
PFNWGLGETEXTENSIONSSTRINGEXTPROC _wglGetExtensionsStringEXT = NULL;
_wglGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)wglGetProcAddress("wglGetExtensionsStringEXT");
return !(strstr(_wglGetExtensionsStringEXT(), extName.c_str()) == NULL);
}
