Is the "gl_ext_draw_buffers" extension supported?

The gl_ext_draw_buffers extension provides functionality to support multiple draw buffers in WebGL. Determining whether this extension is supported depends on the following factors:

1. **Browser and WebGL Version:** The availability of the gl_ext_draw_buffers extension depends on the WebGL version your browser supports. This extension is typically available in WebGL 2.0 or as an optional extension in WebGL 1.0, depending on the browser's implementation.

2. **Device and GPU Support:** The extension’s support also relies on the underlying hardware and GPU. Some older devices or graphics cards may not support this feature, even if the browser does.

3. **How to Check Support:** To check if the gl_ext_draw_buffers extension is supported, you can query it using JavaScript in the context of a WebGL rendering context:

const gl = canvas.getContext("webgl") || canvas.getContext("experimental-webgl");
const ext = gl.getExtension("WEBGL_draw_buffers");
if (ext) {
    console.log("gl_ext_draw_buffers is supported!");
} else {
    console.log("gl_ext_draw_buffers is not supported.");
}

4. **Fallback Options:** If the extension is not supported, you may need to implement alternative techniques, such as rendering to a single draw buffer and performing multiple rendering passes.

In summary, the gl_ext_draw_buffers extension is widely supported in modern browsers and hardware configurations that support WebGL 2.0, but you should always verify its availability before using it in your application.

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