This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The WebGL2RenderingContext.readBuffer() method of the WebGL 2 API selects a color buffer as the source for pixels for subsequent calls to copyTexImage2D, copyTexSubImage2D, copyTexSubImage3D or readPixels.
Syntax
void gl.readBuffer(src);
Parameters
src- A
GLenumspecifying a color buffer. Possible values:gl.BACK: Reads from the back color buffer.gl.NONE: Reads from no color buffer.gl.COLOR_ATTACHMENT{0-15}: Reads from one of the 16 color attachment buffers.
Return value
None.
Examples
gl.readBuffer(gl.COLOR_ATTACHMENT0);
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebGL 2.0 The definition of 'readBuffer' in that specification. |
Editor's Draft | Initial definition for WebGL. |
| OpenGL ES 3.0 The definition of 'glReadBuffer' 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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
readBuffer | Chrome Full support 56 | Edge No support No | Firefox Full support 51 | IE No support No | Opera Full support 43 | Safari No support No | WebView Android Full support 58 | Chrome Android Full support 58 | Edge Mobile No support No | Firefox Android Full support 51 | Opera Android Full support 43 | Safari iOS No support No | Samsung Internet Android Full support 7.0 |
Legend
- Full support
- Full support
- No support
- No support