WebGL2RenderingContext: getUniformBlockIndex() method

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

Syntax

js
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

js
// 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
getUniformBlockIndex 56 79 51 43 15 58 51 43 15 7.0 58

See also

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https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/getUniformBlockIndex