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
WebGL Specification (WebGL)
# 5.14.5
WebGL 2.0 Specification (WebGL 2.0)
# 3.7.3

Browser compatibility

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See also