How can I enable webGL extension?

[tuket]

Hi,

I would like to enable the EXT_color_buffer_float.

Is there any C API for that, or I have to use JavaScript code?

I have tried doing the following:

#ifdef __EMSCRIPTEN__
	EM_ASM(
		const ext = gl.getExtension("EXT_color_buffer_float");
		if (!ext) {
			console.error("need EXT_color_buffer_float");
		}
	);
#endif

But I get the following error:

Uncaught ReferenceError: gl is not defined

Do I need to "import" something to use gl? I don't know much JS.

Thanks!

[tuket]

Found my solution here: https://stackoverflow.com/questions/26736126/enable-webgl-extensions-from-asm-js-emscripten

#ifdef __EMSCRIPTEN__
	const EMSCRIPTEN_WEBGL_CONTEXT_HANDLE webGlContext = emscripten_webgl_get_current_context();
	const EM_BOOL enabledOk = emscripten_webgl_enable_extension(webGlContext, "EXT_color_buffer_float");
#endif