我们的志愿者还没有将这篇文章翻译为 中文 (简体)加入我们帮助完成翻译!
您也可以阅读此文章的English (US)版。

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.


Enable the extension:


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;


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic Support ? (Yes)30.0 ? ? ?
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support ? ? (Yes) ? ? ? ?

See also