W3cubDocs

/DOM

WebGL2RenderingContext.getUniformBlockIndex

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

Specification	Status	Comment
WebGL 2.0 The definition of 'getUniformBlockIndex' in that specification.	Editor's Draft	Initial definition for WebGL.
OpenGL ES 3.0 The definition of 'glGetUniformBlockIndex' in that specification.	Standard	Man page of the (similar) OpenGL API.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	56	No	51	No	43	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	58	58	No	51	43	No	7.0