WebGL2RenderingContext.blitFramebuffer()

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The WebGL2RenderingContext.blitFramebuffer() method of the WebGL 2 API transfers a block of pixels from the read framebuffer to the draw framebuffer.

Syntax

void gl.blitFramebuffer(srcX0, srcY0, srcX1, srcY1,
                        dstX0, dstY0, dstX1, dstY1,
                        mask, filter);

Parameters

srcX0, srcY0, srcX1, srcY1
A GLint specifying the bounds of the source rectangle.
dstX0, dstY0, dstX1, dstY1
A GLint specifying the bounds of the destination rectangle.
mask
A GLbitfield specifying a bitwise OR mask indicating which buffers are to be copied. Possible values:
  • gl.COLOR_BUFFER_BIT
  • gl.DEPTH_BUFFER_BIT
  • gl.STENCIL_BUFFER_BIT
filter
A GLenum specifying the interpolation to be applied if the image is stretched. Possible values:
  • gl.NEAREST
  • gl.LINEAR

Return value

None.

Examples

gl.blitFramebuffer(0, 0, canvas.width, canvas.height,
                   0, 0, canvas.width, canvas.height,
                   gl.COLOR_BUFFER_BIT, gl.NEAREST);

Specifications

Specification Status Comment
WebGL 2.0
The definition of 'blitFramebuffer' in that specification.
Editor's Draft Initial definition for WebGL.
OpenGL ES 3.0
The definition of 'glBlitFramebuffer' in that specification.
Standard Man page of the (similar) OpenGL API.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 56Edge No support NoFirefox Full support 51IE No support NoOpera Full support 43Safari No support NoWebView Android Full support 58Chrome Android Full support 58Edge Mobile No support NoFirefox Android Full support 51Opera Android Full support 43Safari iOS No support NoSamsung Internet Android Full support 7.0

Legend

Full support  
Full support
No support  
No support

See also

Document Tags and Contributors

Contributors to this page: fscholz, teoli, JeremiePelletier
Last updated by: fscholz,