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WebGL2RenderingContext: getActiveUniforms() method

The WebGL2RenderingContext.getActiveUniforms() method of the WebGL 2 API retrieves information about active uniforms within a WebGLProgram.

Syntax

js

getActiveUniforms(program, uniformIndices, pname)

Parameters

program

A WebGLProgram containing the active uniforms.

uniformIndices

An Array of GLuint specifying the indices of the active uniforms to query.

pname

A GLenum specifying which information to query. Possible values:

gl.UNIFORM_TYPE

Returns an Array of GLenum indicating the types of the uniforms.

gl.UNIFORM_SIZE

Returns an Array of GLuint indicating the sizes of the uniforms.

gl.UNIFORM_BLOCK_INDEX

Returns an Array of GLint indicating the block indices of the uniforms.

gl.UNIFORM_OFFSET

Returns an Array of GLint indicating the uniform buffer offsets.

gl.UNIFORM_ARRAY_STRIDE

Returns an Array of GLint indicating the strides between the elements.

gl.UNIFORM_MATRIX_STRIDE

Returns an Array of GLint indicating the strides between columns of a column-major matrix or a row-major matrix.

gl.UNIFORM_IS_ROW_MAJOR

Returns an Array of GLboolean indicating whether each of the uniforms is a row-major matrix or not.

Return value

Depends on which information is requested using the pname parameter.

Examples

js

const uniformIndices = gl.getUniformIndices(program, [
  "UBORed",
  "UBOGreen",
  "UBOBlue",
]);
const uniformOffsets = gl.getActiveUniforms(
  program,
  uniformIndices,
  gl.UNIFORM_OFFSET,
);

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
getActiveUniforms 56 79 51 No 43 15 58 58 51 43 15 7.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/getActiveUniforms