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    WebGL2RenderingContext.compressedTexSubImage3D()

    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, ArrayBufferView? pixels);

    Parameters

    target
    A GLenum specifying 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 GLint specifying the level of detail. Level 0 is the base image level and level n is the nth mipmap reduction level.
    xoffset
    A GLint specifying the x offset within the compressed texture image.
    yoffset
    A GLint specifying the y offset within the compressed texture image.
    zoffset
    A GLint specifying the z offset within the compressed texture image.
    width
    A GLsizei specifying the width of the texture.
    height
    A GLsizei specifying the height of the texture.
    depth
    A GLsizei specifying the depth of the texture.
    format
    A GLenum specifying the compressed image format. Possible values:
    • gl.COMPRESSED_R11_EAC
    • gl.COMPRESSED_SIGNED_R11_EAC
    • gl.COMPRESSED_RG11_EAC
    • gl.COMPRESSED_SIGNED_RG11_EAC
    • gl.COMPRESSED_RGB8_ETC2
    • gl.COMPRESSED_RGBA8_ETC2_EAC
    • gl.COMPRESSED_SRGB8_ETC2
    • gl.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
    • gl.COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
    • gl.COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
    pixels
    A ArrayBufferView that 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

    Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
    Basic support No support [2] No support Nightly build [1] No support No support No support
    Feature Android Chrome for Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile
    Basic support No support No support No support No support No support No support No support

    [1] WebGL 2 is enabled by default in Firefox Nightly. To enable it in a release version of Firefox, set the preference webgl.enable-prototype-webgl2 to true in about:config.

    [2] To use an experimental implementation of WebGL 2 in Chrome, you have to start Chrome with the runtime flag --enable-unsafe-es3-apis.

    See also

    Document Tags and Contributors

    Tags: 
     Contributors to this page: fscholz
     Last updated by: fscholz,