WebGL2RenderingContext: getIndexedParameter() method

Available in workers

The WebGL2RenderingContext.getIndexedParameter() method of the WebGL 2 API returns indexed information about a given target.

Syntax

getIndexedParameter(target, index)

Parameters

• target

  • : A GLenum specifying the target for which to return information. Possible values:

    • gl.TRANSFORM_FEEDBACK_BUFFER_BINDING: Returns a WebGLBuffer.
    • gl.TRANSFORM_FEEDBACK_BUFFER_SIZE: Returns a GLsizeiptr.
    • gl.TRANSFORM_FEEDBACK_BUFFER_START: Returns a GLintptr.
    • gl.UNIFORM_BUFFER_BINDING: Returns a WebGLBuffer.
    • gl.UNIFORM_BUFFER_SIZE: Returns a GLsizeiptr.
    • gl.UNIFORM_BUFFER_START: Returns a GLintptr.

    When using the OES_draw_buffers_indexed WebGL 2 extension, the following values are available additionally:

    • gl.BLEND_EQUATION_RGB: Returns the RGB blend equation for the draw buffer at index.
    • gl.BLEND_EQUATION_ALPHA: Returns the alpha blend equation for the draw buffer at index.
    • gl.BLEND_SRC_RGB: Returns the source RGB blend function for the draw buffer at index.
    • gl.BLEND_SRC_ALPHA: Returns the source alpha blend function for the draw buffer at index.
    • gl.BLEND_DST_RGB: Returns the destination RGB blend function for the draw buffer at index.
    • gl.BLEND_DST_ALPHA: Returns the destination alpha blend function for the draw buffer at index.
    • gl.COLOR_WRITEMASK: Returns an array containing color components are enabled for the draw buffer at index.

• index

  • : A GLuint specifying the index of the target that is queried.

Return value

Depends on the requested information (as specified with target).

Examples

const binding = gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0);

Specifications

Browser compatibility

See also

• getParameter()