WebGL2RenderingContext: getActiveUniformBlockParameter() 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.getActiveUniformBlockParameter()
method of the WebGL 2 API retrieves
information about an active uniform block within a WebGLProgram.
Syntax
getActiveUniformBlockParameter(program, uniformBlockIndex, pname)
Parameters
program-
A
WebGLProgramcontaining the active uniform block. uniformBlockIndex-
A
GLuintspecifying the index of the active uniform block within the program. pname-
A
GLenumspecifying which information to query. Possible values:gl.UNIFORM_BLOCK_BINDING-
Returns a
GLuintindicating the uniform buffer binding point. gl.UNIFORM_BLOCK_DATA_SIZE-
Returns a
GLuintindicating the minimum total buffer object size. gl.UNIFORM_BLOCK_ACTIVE_UNIFORMS-
Returns a
GLuintindicating the number of active uniforms in the uniform block. gl.UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES-
Returns a
Uint32Arrayindicating the list of active uniforms in the uniform block. gl.UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER-
Returns a
GLbooleanindicating whether the uniform block is referenced by the vertex shader. gl.UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER-
Returns a
GLbooleanindicating whether the uniform block is referenced by the fragment shader.
Return value
Depends on which information is requested using the pname parameter. If an
error occurs, null is returned.
Examples
const blockSize = gl.getActiveUniformBlockParameter(
program,
blockIndex,
gl.UNIFORM_BLOCK_DATA_SIZE,
);
Specifications
| Specification |
|---|
| WebGL 2.0 Specification # 3.7.16 |
Browser compatibility
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