WEBGL_compressed_texture_etc1 extension
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The WEBGL_compressed_texture_etc1 extension is part of the WebGL API and exposes the ETC1 compressed texture format.
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.
Constants
The compressed texture format is exposed by a constant and can be used with the compressedTexImage2D() method (note that ETC1 is not supported with the compressedTexSubImage2D() method).
ext.COMPRESSED_RGB_ETC1_WEBGL-
Compresses 24-bit RGB data with no alpha channel.
Examples
const ext = gl.getExtension("WEBGL_compressed_texture_etc1");
const texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.compressedTexImage2D(
gl.TEXTURE_2D,
0,
ext.COMPRESSED_RGB_ETC1_WEBGL,
512,
512,
0,
textureData,
);
Specifications
| Specification |
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| WebGL WEBGL_compressed_texture_etc1 Extension Specification |
Browser compatibility
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WEBGL_compressed_texture_etc1
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- No support
- No support