This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The WebGL2RenderingContext.compressedTexSubImage3D() method of the WebGL API specifies a three-dimensional sub-rectangle for a texture image in a compressed format.
Syntax
void gl.compressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, offset); void gl.compressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, ArrayBufferView srcData, optional srcOffset, optional srcLengthOverride);
Parameters
target- A
GLenumspecifying the binding point (target) of the active texture. Possible values:gl.TEXTURE_3D: A three-dimensional texture.gl.TEXTURE_2D_ARRAY: A two-dimensional array texture.
level- A
GLintspecifying the level of detail. Level 0 is the base image level and level n is the nth mipmap reduction level. xoffset- A
GLintspecifying the x offset within the compressed texture image. yoffset- A
GLintspecifying the y offset within the compressed texture image. zoffset- A
GLintspecifying the z offset within the compressed texture image. width- A
GLsizeispecifying the width of the texture. height- A
GLsizeispecifying the height of the texture. depth- A
GLsizeispecifying the depth of the texture. format- A
GLenumspecifying the compressed image format. Possible values:gl.COMPRESSED_R11_EACgl.COMPRESSED_SIGNED_R11_EACgl.COMPRESSED_RG11_EACgl.COMPRESSED_SIGNED_RG11_EACgl.COMPRESSED_RGB8_ETC2gl.COMPRESSED_RGBA8_ETC2_EACgl.COMPRESSED_SRGB8_ETC2gl.COMPRESSED_SRGB8_ALPHA8_ETC2_EACgl.COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2gl.COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
srcData- A
ArrayBufferViewthat be used as a data store for the compressed image data in memory.
Return value
None.
Examples
gl.compressedTexSubImage3D(gl.TEXTURE_3D, 0, 0, 0, 512, 512, 512, gl.COMPRESSED_R11_EAC, textureData);
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebGL 2.0 The definition of 'compressedTexSubImage3D' in that specification. |
Editor's Draft | Initial definition for WebGL. |
| OpenGL ES 3.0 The definition of 'glCompressedTexSubImage3D' in that specification. |
Standard | Man page of the (similar) OpenGL ES 3.0 API. |
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.
| Feature | Chrome | Firefox | Edge | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | 56 | 51.0 | (No) | (No) | 43 | (No) |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | (No) | (No) | (No) | (No) | (No) | (No) | (No) |