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

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.

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

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