Web/API/WebGLRenderingContext/copyTexSubImage2D

The WebGLRenderingContext.copyTexSubImage2D() method of the WebGL API copies pixels from the current WebGLFramebuffer into an existing 2D texture sub-image.

Syntax

void gl.copyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);

Parameters

target: A GLenum specifying the binding point (target) of the active texture. Possible values:

gl.TEXTURE_2D

A two-dimensional texture.
gl.TEXTURE_CUBE_MAP_POSITIVE_X: Positive X face for a cube-mapped texture.
gl.TEXTURE_CUBE_MAP_NEGATIVE_X: Negative X face for a cube-mapped texture.
gl.TEXTURE_CUBE_MAP_POSITIVE_Y: Positive Y face for a cube-mapped texture.
gl.TEXTURE_CUBE_MAP_NEGATIVE_Y: Negative Y face for a cube-mapped texture.
gl.TEXTURE_CUBE_MAP_POSITIVE_Z: Positive Z face for a cube-mapped texture.
gl.TEXTURE_CUBE_MAP_NEGATIVE_Z: Negative Z face for a cube-mapped 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 horizontal offset within the texture image.
yoffset: A GLint specifying the vertical offset within the texture image.
x: A GLint specifying the x coordinate of the lower left corner where to start copying.
y: A GLint specifying the y coordinate of the lower left corner where to start copying.
width: A GLsizei specifying the width of the texture.
height: A GLsizei specifying the height of the texture.

Return value

None.

Examples

gl.copyTexSubImage2D(gl.TEXTURE_2D, 0, 0,0, 0, 0, 16, 16);

Specifications

Specification	Status	Comment
WebGL 1.0The definition of 'copyTexSubImage2D' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0The definition of 'glCopyTexSubImage2D' in that specification.	Standard	Man page of the (similar) OpenGL 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.

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
`copyTexSubImage2D`	Chrome Full support 9	Edge Full support 12	Firefox Full support 4	IE Full support 11	Opera Full support 12	Safari Full support 5.1	WebView Android Full support Yes	Chrome Android Full support 25	Firefox Android Full support Yes	Opera Android Full support 12	Safari iOS Full support 8	Samsung Internet Android Full support 1.5

Legend

Full support: Full support