WEBGL_compressed_texture_atc

WEBGL_compressed_texture_atc extension is part of the WebGL API and exposes 3 ATC compressed texture formats. ATC is a proprietary compression algorithm for compressing textures on handheld devices.

Compressed textures reduce the amount of memory needed to store a texture on the GPU, allowing for higher resolution textures or more of the same resolution textures.

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

Availability: ATC compression is typically available on mobile devices with Adreno GPUs , that are currently only built into Qualcomm Snapdragon devices.

This extension is available to both, WebGL1 and WebGL2 contexts.

常量

The compressed texture formats are exposed by 3 constants and can be used in two functions: compressedTexImage2D() and compressedTexSubImage2D() .

ext.COMPRESSED_RGB_ATC_WEBGL
Compresses RGB textures with no alpha channel.
ext.COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL
Compresses RGBA textures using explicit alpha encoding (useful when alpha transitions are sharp).
ext.COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL
Compresses RGBA textures using interpolated alpha encoding (useful when alpha transitions are gradient).

范例

var ext = gl.getExtension('WEBGL_compressed_texture_atc');
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, ext.COMPRESSED_RGB_ATC_WEBGL, 512, 512, 0, textureData);
					

规范

规范 状态 Comment
WEBGL_compressed_texture_atc
The definition of 'WEBGL_compressed_texture_atc' in that specification.
草案 初始定义。

浏览器兼容性

更新 GitHub 上的兼容性数据
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
WEBGL_compressed_texture_atc Chrome ? — 68 Edge No Firefox 18 — 64
不支持 18 — 64
不支持 ? — 58
Prefixed
Prefixed Implemented with the vendor prefix: MOZ_
IE ? Opera ? — 55 Safari ? WebView Android ? — 68 Chrome Android ? — 68 Firefox Android ? Opera Android ? — 48 Safari iOS ? Samsung Internet Android ? — 10.0

图例

不支持
不支持
兼容性未知
兼容性未知
要求使用供应商前缀或不同名称。
要求使用供应商前缀或不同名称。

另请参阅