Web/API/EXT frag depth

From Get docs


The EXT_frag_depth extension is part of the WebGL API and enables to set a depth value of a fragment from within the fragment shader.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Availability: This extension is only available to WebGL1 contexts. In WebGL2, the functionality of this extension is available on the WebGL2 context by default. It requires GLSL #version 300 es.


Examples

Enable the extension:

gl.getExtension('EXT_frag_depth');

Now the output variable gl_FragDepthEXT is available to set a depth value of a fragment from within the fragment shader:

<script type="x-shader/x-fragment">
void main() {
  gl_FragColor = vec4(1.0, 0.0, 1.0, 1.0); 
  gl_FragDepthEXT = 0.5; 
}
</script>

Specifications

Specification Status Comment
EXT_frag_depthThe definition of 'EXT_frag_depth' in that specification. Recommendation Initial definition.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
EXT_frag_depth Chrome

Full support 38

Edge

No support 12 — 79

Firefox

Full support 47

IE

No support No

Opera

Full support 25

Safari

Full support 7

WebView Android

Full support 38

Chrome Android

Full support 38

Firefox Android

Full support 47

Opera Android

Full support 25

Safari iOS

Full support 7

Samsung Internet Android

Full support 3.0

Legend

Full support  
Full support
No support  
No support


See also