WebGL2RenderingContext: getActiveUniforms() method

Available in workers

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

Syntax

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

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

Specifications

Browser compatibility

See also

• getActiveUniformBlockParameter()