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 1.0 The definition of 'copyTexSubImage2D' in that specification. |
Recommendation | Initial definition. |
OpenGL ES 2.0 The definition of 'glCopyTexSubImage2D' in that specification. |
Standard | Man page of the (similar) OpenGL API. |
Browser compatibility
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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.