WebGL2RenderingContext.invalidateSubFramebuffer()

The WebGL2RenderingContext.invalidateSubFramebuffer() method of the WebGL 2 API invalidates portions of the contents of attachments in a framebuffer.

Syntax

invalidateSubFramebuffer(target, attachments, x, y, width, height)

Parameters

target

A GLenum specifying the binding point (target). Possible values:

gl.FRAMEBUFFER

Collection buffer data storage of color, alpha, depth and stencil buffers used to render an image.

gl.DRAW_FRAMEBUFFER

Equivalent to gl.FRAMEBUFFER.

gl.READ_FRAMEBUFFER

Used as a source for reading operations.

attachments

An Array of GLenum specifying the attachment points to invalidate. Possible values:

gl.COLOR_ATTACHMENT{0-15}

Invalidates one of the framebuffer's color buffers.

gl.DEPTH_ATTACHMENT

Invalidates the framebuffer's depth buffer.

gl.STENCIL_ATTACHMENT

Invalidates the framebuffer's stencil buffer.

gl.DEPTH_STENCIL_ATTACHMENT

Invalidates both the framebuffer's depth and stencil buffer.

x

A GLint specifying the left origin of the pixel rectangle to invalidate.

y

A GLint specifying the bottom origin of the pixel rectangle to invalidate.

width

A GLsizei specifying the width of the pixel rectangle to invalidate.

height

A GLsizei specifying the height of the pixel rectangle to invalidate.

Return value

None (undefined).

Examples

gl.invalidateSubFramebuffer(gl.READ_FRAMEBUFFER,
                            [gl.COLOR_ATTACHMENT0, gl.COLOR_ATTACHMENT1],
                            0, 0, 256, 256);

Specifications

Specification
WebGL 2.0 Specification
# 3.7.4

Browser compatibility

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See also