WebGL2RenderingContext.invalidateSubFramebuffer() - Web APIs 编辑

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

Syntax

void gl.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.

Examples

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

Specifications

Browser compatibility

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See also

• WebGL2RenderingContext.invalidateFramebuffer()