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WebGL2RenderingContext.readBuffer

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 GLenum specifying 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

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 56 No 51 No 43 No
Feature Android webview Chrome for Android Edge mobile Firefox for Android IE mobile Opera Android iOS Safari
Basic support 58 58 No 51 No 43 No

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/readBuffer