WebGLRenderingContext.getRenderbufferParameter

The WebGLRenderingContext.getRenderbufferParameter() method of the WebGL API returns information about the renderbuffer.

Syntax

any gl.getRenderbufferParameter(target, pname);

Parameters

target

A Glenum specifying the target renderbuffer object. Possible values:

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

pname

A Glenum specifying the information to query. Possible values:

• gl.RENDERBUFFER_WIDTH: Returns a GLint indicating the width of the image of the currently bound renderbuffer.
• gl.RENDERBUFFER_HEIGHT: Returns a GLint indicating the height of the image of the currently bound renderbuffer.
• gl.RENDERBUFFER_INTERNAL_FORMAT: Returns a GLenum indicating the internal format of the currently bound renderbuffer. The default is gl.RGBA4. Possible return values:
  • gl.RGBA4: 4 red bits, 4 green bits, 4 blue bits 4 alpha bits.
  • gl.RGB565: 5 red bits, 6 green bits, 5 blue bits.
  • gl.RGB5_A1: 5 red bits, 5 green bits, 5 blue bits, 1 alpha bit.
  • gl.DEPTH_COMPONENT16: 16 depth bits.
  • gl.STENCIL_INDEX8: 8 stencil bits.
• gl.RENDERBUFFER_GREEN_SIZE: Returns a GLint that is the resolution size (in bits) for the green color.
• gl.RENDERBUFFER_BLUE_SIZE: Returns a GLint that is the resolution size (in bits) for the blue color.
• gl.RENDERBUFFER_RED_SIZE: Returns a GLint that is the resolution size (in bits) for the red color.
• gl.RENDERBUFFER_ALPHA_SIZE: Returns a GLint that is the resolution size (in bits) for the alpha component.
• gl.RENDERBUFFER_DEPTH_SIZE: Returns a GLint that is the resolution size (in bits) for the depth component.
• gl.RENDERBUFFER_STENCIL_SIZE: Returns a GLint that is the resolution size (in bits) for the stencil component.
• When using a WebGL 2 context, the following value is available additionally:
  • gl.RENDERBUFFER_SAMPLES: Returns a GLint indicating the number of samples of the image of the currently bound renderbuffer.

Return value

Depends on the requested information (as specified with pname). Either a GLint or a GLenum.

Examples

gl.getRenderbufferParameter(gl.RENDERBUFFER, gl.RENDERBUFFER_WIDTH);

Specifications

Specification	Status	Comment
WebGL 1.0 The definition of 'getRenderbufferParameter' in that specification.	Recommendation	Initial definition for WebGL.
OpenGL ES 2.0 The definition of 'glGetRenderbufferParameteriv' in that specification.	Standard	Man page of the (similar) OpenGL API.
WebGL 2.0 The definition of 'getRenderbufferParameter' in that specification.	Editor's Draft	Updated definition for WebGL 2.
OpenGL ES 3.0 The definition of 'glGetRenderbufferParameteriv' in that specification.	Standard	Man page of the (similar) OpenGL ES 3 API. Adds a new pname value: gl.RENDERBUFFER_SAMPLES

Browser compatibility

See also

• WebGLRenderingContext.bindRenderbuffer()
• WebGLRenderingContext.createRenderbuffer()
• WebGLRenderingContext.deleteRenderbuffer()
• WebGLRenderingContext.renderbufferStorage()
• Other buffers: WebGLBuffer, WebGLFramebuffer