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WebGL2RenderingContext: compressedTexSubImage3D() method

The WebGL2RenderingContext.compressedTexSubImage3D() method of the WebGL API specifies a three-dimensional sub-rectangle for a texture image in a compressed format.

Syntax

js

compressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, imageSize, offset)

compressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, srcData)
compressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, srcData, srcOffset)
compressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, srcData, srcOffset, srcLengthOverride)

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 n-th 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
imageSize

A GLint specifying the number of bytes to read from the buffer bound to gl.PIXEL_UNPACK_BUFFER.

offset

A GLint specifying the offset in bytes from which to read from the buffer bound to gl.PIXEL_UNPACK_BUFFER.

srcData

A TypedArray or a DataView object that will be used as a data store for the compressed image data in memory.

Return value

None (undefined).

Examples

js

gl.compressedTexSubImage3D(
  gl.TEXTURE_3D,
  0,
  0,
  0,
  512,
  512,
  512,
  gl.COMPRESSED_R11_EAC,
  textureData,
);

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
compressedTexSubImage3D 56 79 51 No 43 15 58 58 51 43 15 7.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/compressedTexSubImage3D