Baseline Widely available
Note: This feature is available in Web Workers.
The WebGLRenderingContext.getBufferParameter() method of the WebGL API returns information about the buffer.
getBufferParameter(target, pname)
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. One of the following:
gl.STATIC_DRAWgl.DYNAMIC_DRAWgl.STREAM_DRAWWhen using a WebGL 2 context, the following values are available additionally:
gl.STATIC_READgl.DYNAMIC_READgl.STREAM_READgl.STATIC_COPYgl.DYNAMIC_COPYgl.STREAM_COPYDepends on the requested information (as specified with pname). Either a GLint or a GLenum.
gl.getBufferParameter(gl.ARRAY_BUFFER, gl.BUFFER_SIZE);
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