#pragma section-numbers off
#pragma disable-camelcase

= SDL_GL_ExtensionSupported =
Use this function to check if an OpenGL extension is supported for the current context.

<<TableOfContents()>>

== Syntax ==
{{{#!highlight cpp
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 ==
{{{#!highlight cpp

    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.

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[[CategoryAPI]], [[CategoryVideo]]