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.copyTexSubImage3D() method of the WebGL API copies pixels from the current WebGLFramebuffer into an existing 3D texture sub-image.
Syntax
void gl.copyTexSubImage3D(target, level, xoffset, yoffset, zoffset, x, y, width, height);
Parameters
target- A
GLenumspecifying 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
GLintspecifying the level of detail. Level 0 is the base image level and level n is the nth mipmap reduction level. xoffset- A
GLintspecifying the x offset within the texture image. yoffset- A
GLintspecifying the y offset within the texture image. zoffset- A
GLintspecifying the z 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. height- A
GLsizeispecifying the height of the texture.
Return value
None.
Examples
gl.copyTexSubImage3D(gl.TEXTURE_4D, 0, 0, 0, 0, 0, 0, 16, 16);
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebGL 2.0 The definition of 'copyTexSubImage3D' in that specification. |
Editor's Draft | Initial definition. |
| OpenGL ES 3.0 The definition of 'glCopyTexSubImage3D' in that specification. |
Standard | Man page of the (similar) OpenGL 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.