WebGLRenderingContext.framebufferRenderbuffer() - Web APIs 编辑

The WebGLRenderingContext.framebufferRenderbuffer() method of the WebGL API attaches a WebGLRenderbuffer object to a WebGLFramebuffer object.

Syntax

void gl.framebufferRenderbuffer(target, attachment, renderbuffertarget, renderbuffer);

target

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

gl.FRAMEBUFFER: Collection buffer data storage of color, alpha, depth and stencil buffers used to render an image.
When using a WebGL 2 context, the following values are available additionally:
- gl.DRAW_FRAMEBUFFER: Equivalent to gl.FRAMEBUFFER. Used as a destination for drawing, rendering, clearing, and writing operations.
- gl.READ_FRAMEBUFFER: Used as a source for reading operations.

attachment

A GLenum specifying the attachment point for the render buffer. Possible values:

gl.COLOR_ATTACHMENT0: color buffer.
gl.DEPTH_ATTACHMENT: depth buffer.
gl.DEPTH_STENCIL_ATTACHMENT: depth and stencil buffer.
gl.STENCIL_ATTACHMENT: stencil buffer.
When using a WebGL 2 context, the following values are available additionally:
- gl.COLOR_ATTACHMENT1 gl.COLOR_ATTACHMENT2 gl.COLOR_ATTACHMENT3 gl.COLOR_ATTACHMENT4 gl.COLOR_ATTACHMENT5 gl.COLOR_ATTACHMENT6 gl.COLOR_ATTACHMENT7 gl.COLOR_ATTACHMENT8 gl.COLOR_ATTACHMENT9 gl.COLOR_ATTACHMENT10 gl.COLOR_ATTACHMENT11 gl.COLOR_ATTACHMENT12 gl.COLOR_ATTACHMENT13 gl.COLOR_ATTACHMENT14 gl.COLOR_ATTACHMENT15
When using the WEBGL_draw_buffers extension:
- ext.COLOR_ATTACHMENT0_WEBGL (same as gl.COLOR_ATTACHMENT0)
  ext.COLOR_ATTACHMENT1_WEBGL ext.COLOR_ATTACHMENT2_WEBGL ext.COLOR_ATTACHMENT3_WEBGL ext.COLOR_ATTACHMENT4_WEBGL ext.COLOR_ATTACHMENT5_WEBGL ext.COLOR_ATTACHMENT6_WEBGL ext.COLOR_ATTACHMENT7_WEBGL ext.COLOR_ATTACHMENT8_WEBGL ext.COLOR_ATTACHMENT9_WEBGL ext.COLOR_ATTACHMENT10_WEBGL ext.COLOR_ATTACHMENT11_WEBGL ext.COLOR_ATTACHMENT12_WEBGL ext.COLOR_ATTACHMENT13_WEBGL ext.COLOR_ATTACHMENT14_WEBGL ext.COLOR_ATTACHMENT15_WEBGL

renderbuffertarget

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

gl.RENDERBUFFER: Buffer data storage for single images in a renderable internal format.

renderbuffer

A WebGLRenderbuffer object to attach.

None.

A gl.INVALID_ENUM error is thrown if target is not gl.FRAMEBUFFER, gl.DRAW_FRAMEBUFFER, or gl.READ_FRAMEBUFFER.
A gl.INVALID_ENUM error is thrown if renderbuffertarget is not gl.RENDERBUFFER.
A gl.INVALID_ENUM error is thrown if attachment is not one of the allowed enums.

gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, renderbuffer);

Specification	Status	Comment
WebGL 1.0 The definition of 'framebufferRenderbuffer' in that specification.	Recommendation	Initial definition for WebGL.
OpenGL ES 2.0 The definition of 'glFramebufferRenderbuffer' in that specification.	Standard	Man page of the (similar) OpenGL API.
OpenGL ES 3.0 The definition of 'glFramebufferRenderbuffer' in that specification.	Standard	Man page of the (similar) OpenGL ES 3 API.

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