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WebGL2RenderingContext: getUniformBlockIndex() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨September 2021⁩.

Note: This feature is available in Web Workers.

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

Syntax

getUniformBlockIndex(program, uniformBlockName)

Parameters

program: A WebGLProgram containing the uniform block.
uniformName: A string 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:
const blockIndex = gl.getUniformBlockIndex(program, "UBOData");

Specifications

Specification
WebGL 2.0 Specification> # 3.7.16>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`getUniformBlockIndex`	56	79	51	43	15	58	51	43	15	7.0	58	15