WebGLRenderingContext: copyTexSubImage2D() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The copyTexSubImage2D() method of the WebGLRenderingContext interface of the WebGL API copies pixels from the current WebGLFramebuffer into a 2D texture sub-image.
Syntax
copyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height)
Parameters
target-
A
GLenumspecifying 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
GLintspecifying the level of detail. Level 0 is the base image level and level n is the n-th mipmap reduction level. xoffset-
A
GLintspecifying the horizontal offset within the texture image. yoffset-
A
GLintspecifying the vertical offset within the texture image. x-
A
GLintspecifying the x coordinate of the lower left corner where to start copying. y-
A
GLintspecifying the y coordinate of the lower left corner where to start copying. width-
A
GLsizeispecifying the width of the texture in texels. height-
A
GLsizeispecifying the height of the texture in texels.
Return value
None (undefined).
Examples
gl.copyTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 0, 0, 16, 16);
Specifications
| Specification |
|---|
| WebGL Specification # 5.14.8 |
Browser compatibility
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