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WebGL2RenderingContext: invalidateSubFramebuffer() method

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