(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_GL_ExtensionSupported

Check if an OpenGL extension is supported for the current context.

Header File

Defined in <SDL3/SDL_video.h>

Syntax

bool SDL_GL_ExtensionSupported(const char *extension);

Function Parameters

const char *

extension

the name of the extension to check.

Return Value

(bool) Returns true if the extension is supported, false otherwise.

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 3.1.3.

Code Examples

    extern void draw_to_the_screen_with_framebuffer_blit(void);
    extern void draw_to_the_screen_with_a_textured_quad(void);

    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!
    }

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CategoryAPI, CategoryAPIFunction, CategoryVideo

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