Web/API/WEBGL compressed texture atc

From Get docs


The 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 in the 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.


Constants

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).

Examples

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); 

Specifications

Specification Status Comment
WEBGL_compressed_texture_atcThe definition of 'WEBGL_compressed_texture_atc' in that specification. Draft 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
WEBGL_compressed_texture_atc Chrome

No support ? — 68

Edge

No support No

Firefox No support 18 — 64


No support 18 — 64


No support ? — 58

Prefixed'

Prefixed' Implemented with the vendor prefix: MOZ_

IE

?

Opera

No support ? — 55

Safari

?

WebView Android

No support ? — 68

Chrome Android

No support ? — 68

Firefox Android

?

Opera Android

No support ? — 48

Safari iOS

?

Samsung Internet Android

No support ? — 10.0

Legend

No support  
No support
Compatibility unknown  
Compatibility unknown
Requires a vendor prefix or different name for use.'
Requires a vendor prefix or different name for use.


See also