WebGLRenderingContext.framebufferRenderbuffer

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

Syntax

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

Parameters

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.STENCIL_ATTACHMENT: stencil buffer.
• When using a WebGL 2 context, the following values are available additionally:
  • gl.DEPTH_STENCIL_ATTACHMENT: depth and stencil buffer.
  • 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.

Return value

None.

Exceptions

• 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.

Examples

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

Specifications

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.

Browser compatibility

See also

• WebGLRenderingContext.createFramebuffer()
• WebGLRenderingContext.deleteFramebuffer()
• WebGLRenderingContext.isFramebuffer()
• Other buffers: WebGLBuffer, WebGLRenderbuffer
• WEBGL_draw_buffers