您正位於 MDN Web Docs 的可編輯版本

以 MDN Web Docs 使用者身分檢視: https://developer.mozilla.org/zh-TW/docs/Web/API/EXT_frag_depth

我們的志工尚未將本文翻譯為 正體中文 (繁體) 版本。加入我們,幫忙翻譯!
您也可以閱讀本文的 English (US) 版本。

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_depth
The definition of 'EXT_frag_depth' in that specification.
Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
EXT_frag_depthChrome Full support 38Edge No support 12 — 79Firefox Full support 47IE No support NoOpera Full support 25Safari Full support 7WebView Android Full support 38Chrome Android Full support 38Firefox Android Full support 47Opera Android Full support 25Safari iOS Full support 7Samsung Internet Android Full support 3.0

Legend

Full support  
Full support
No support  
No support

See also

文件標籤與貢獻者

此頁面的貢獻者: mdnwebdocs-bot, fscholz, nmve, teoli
最近更新: mdnwebdocs-bot,