WebGL2RenderingContext.getActiveUniformBlockParameter()

The WebGL2RenderingContext.getActiveUniformBlockParameter() method of the WebGL 2 API retrieves information about an active uniform block within a WebGLProgram.

program

A WebGLProgram containing the active uniform block.

uniformBlockIndex

A GLuint specifying the index of the active uniform block within the program.

pname

A GLenum specifying which information to query. Possible values:

• gl.UNIFORM_BLOCK_BINDING: Returns a GLuint indicating the uniform buffer binding point.
• gl.UNIFORM_BLOCK_DATA_SIZE: Returns a GLuint indicating the minimum total buffer object size.
• gl.UNIFORM_BLOCK_ACTIVE_UNIFORMS: Returns a GLuint indicating the number of active uniforms in the uniform block.
• gl.UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES: Returns a Uint32Array indicating the list of active uniforms in the uniform block.
• gl.UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER: Returns a GLboolean indicating whether the uniform block is referenced by the vertex shader.
• gl.UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER: Returns a GLboolean indicating whether the uniform block is referenced by the fragment shader.

Depends on which information is requested using the pname parameter. If an error occurs, null is returned.

• WebGL2RenderingContext.getActiveUniforms()