TheWebGL2RenderingContext.blitFramebuffer() method oftheWebGL 2 API transfers a block of pixelsfrom the read framebuffer to the draw framebuffer. Read and draw framebuffers are boundusingWebGLRenderingContext.bindFramebuffer().

Syntax

blitFramebuffer(srcX0, srcY0, srcX1, srcY1,                dstX0, dstY0, dstX1, dstY1,                mask, filter)

Parameters

srcX0,srcY0,srcX1,srcY1

AGLint specifying the bounds of the source rectangle.

dstX0,dstY0,dstX1,dstY1

AGLint specifying the bounds of the destination rectangle.

mask

AGLbitfield specifying a bitwise OR mask indicating which buffersare to be copied. Possible values:

• gl.COLOR_BUFFER_BIT
• gl.DEPTH_BUFFER_BIT
• gl.STENCIL_BUFFER_BIT

filter

AGLenum specifying the interpolation to be applied if the image isstretched. Possible values:

• gl.NEAREST
• gl.LINEAR

Return value

None (undefined).

Examples

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

Specifications

Browser compatibility

See also

• WebGLRenderingContext.bindFramebuffer()
• WebGLRenderingContext.getRenderbufferParameter()