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← Revision 8 as of 2016-05-14 22:02:31 ⇥
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| Use this function to return true if an OpenGL extension is supported for the current context. | Use this function to check if an OpenGL extension is supported for the current context. |
SDL_GL_ExtensionSupported
Use this function to check if an OpenGL extension is supported for the current context.
Contents
Syntax
SDL_bool SDL_GL_ExtensionSupported(const char* extension)
Function Parameters
extension |
the name of the extension to check |
Return Value
Returns SDL_TRUE if the extension is supported, SDL_FALSE otherwise.
Code Examples
if (SDL_GL_ExtensionSupported("GL_EXT_framebuffer_blit")) {
draw_to_the_screen_with_framebuffer_blit(); // faster!
} else {
draw_to_the_screen_with_a_textured_quad(); // slower!
}
Remarks
This function operates on the current GL context; you must have created a context and it must be current before calling this function. Do not assume that all contexts you create will have the same set of extensions available, or that recreating an existing context will offer the same extensions again.
While it's probably not a massive overhead, this function is not an O(1) operation. Check the extensions you care about after creating the GL context and save that information somewhere instead of calling the function every time you need to know.
Version
This function is available since SDL 2.0.0.
