WebGL2RenderingContext.getUniformBlockIndex()

The WebGL2RenderingContext.getUniformBlockIndex() method of the WebGL 2 API retrieves the index of a uniform block within a WebGLProgram.

Syntax

GLuint gl.getUniformBlockIndex(program, uniformBlockName);

Parameters

program

A WebGLProgram containing the uniform block.

uniformName

A DOMString specifying the name of the uniform block to whose index to retrieve.

Return value

A GLuint indicating the uniform block index.

Examples

// Assuming a shader with the following declaration:
// uniform UBOData {
//   mat4 foo;
// } instanceName;

// use the block name, not the instance name:
var blockIndex = gl.getUniformBlockIndex(program, 'UBOData');

Specifications

Browser compatibility

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See also

• WebGL2RenderingContext.getUniformIndices()