Web/API/WebGLRenderingContext/getBufferParameter

The WebGLRenderingContext.getBufferParameter() method of the WebGL API returns information about the buffer.

Syntax

any gl.getBufferParameter(target, pname);

Parameters

target: A Glenum specifying the target buffer object. Possible values:

gl.ARRAY_BUFFER

Buffer containing vertex attributes, such as vertex coordinates, texture coordinate data, or vertex color data.
gl.ELEMENT_ARRAY_BUFFER: Buffer used for element indices.
When using a WebGL 2 context, the following values are available additionally:

gl.COPY_READ_BUFFER

- Buffer for copying from one buffer object to another.
- gl.COPY_WRITE_BUFFER: Buffer for copying from one buffer object to another.
- gl.TRANSFORM_FEEDBACK_BUFFER: Buffer for transform feedback operations.
- gl.UNIFORM_BUFFER: Buffer used for storing uniform blocks.
- gl.PIXEL_PACK_BUFFER: Buffer used for pixel transfer operations.
- gl.PIXEL_UNPACK_BUFFER: Buffer used for pixel transfer operations.

pname: A Glenum specifying information to query. Possible values:

gl.BUFFER_SIZE

Returns a GLint indicating the size of the buffer in bytes.
gl.BUFFER_USAGE: Returns a GLenum indicating the usage pattern of the buffer. This is either:

gl.STATIC_DRAW, gl.DYNAMIC_DRAW, gl.STREAM_DRAW. When using a WebGL 2 context, the following values are available additionally:

gl.STATIC_READ, gl.DYNAMIC_READ, gl.STREAM_READ, gl.STATIC_COPY, gl.DYNAMIC_COPY, gl.STREAM_COPY.

Return value

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

Examples

gl.getBufferParameter(gl.ARRAY_BUFFER, gl.BUFFER_SIZE);

Specifications

Specification	Status	Comment
WebGL 1.0The definition of 'getBufferParameter' in that specification.	Recommendation	Initial definition for WebGL.
OpenGL ES 2.0The definition of 'glGetBufferParameteriv' in that specification.	Standard	Man page of the (similar) OpenGL ES 2 API.
WebGL 2.0The definition of 'getBufferParameter' in that specification.	Editor's Draft	Updated definition for WebGL.
OpenGL ES 3.0The definition of 'glGetBufferParameter' in that specification.	Standard	Man page of the (similar) OpenGL ES 3 API. Adds new `target` buffers: `gl.COPY_READ_BUFFER`, `gl.COPY_WRITE_BUFFER`, `gl.TRANSFORM_FEEDBACK_BUFFER`, `gl.UNIFORM_BUFFER`, `gl.PIXEL_PACK_BUFFER`, `gl.PIXEL_UNPACK_BUFFER` Adds new `usage` hints: `gl.STATIC_READ`, `gl.DYNAMIC_READ`, `gl.STREAM_READ`, `gl.STATIC_COPY`, `gl.DYNAMIC_COPY`, `gl.STREAM_COPY`.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`getBufferParameter`	Chrome Full support 9	Edge Full support 12	Firefox Full support 4	IE Full support 11	Opera Full support 12	Safari Full support 5.1	WebView Android Full support Yes	Chrome Android Full support 25	Firefox Android Full support Yes	Opera Android Full support 12	Safari iOS Full support 8	Samsung Internet Android Full support 1.5
`WebGL2`	Chrome Full support 56	Edge Full support 79	Firefox Full support 51	IE No support No	Opera Full support 43	Safari No support No	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android Full support 51	Opera Android Full support 43	Safari iOS No support No	Samsung Internet Android Full support 7.0

Legend

Full support: Full support
No support: No support