WebGL2RenderingContext.getActiveUniformBlockParameter()
The
WebGL2RenderingContext.getActiveUniformBlockParameter()
method of the WebGL 2 API retrieves
information about an active uniform block within a WebGLProgram
.
Syntax
any gl.getActiveUniformBlockParameter(program, uniformBlockIndex, pname);
Parameters
program
-
A
WebGLProgram
containing the active uniform block. uniformBlockIndex
-
A
GLuint
specifying the index of the active uniform block within the program. pname
-
A
GLenum
specifying which information to query. Possible values:-
gl.UNIFORM_BLOCK_BINDING
: Returns aGLuint
indicating the uniform buffer binding point. -
gl.UNIFORM_BLOCK_DATA_SIZE
: Returns aGLuint
indicating the minimum total buffer object size. -
gl.UNIFORM_BLOCK_ACTIVE_UNIFORMS
: Returns aGLuint
indicating the number of active uniforms in the uniform block. -
gl.UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES
: Returns aUint32Array
indicating the list of active uniforms in the uniform block. -
gl.UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER
: Returns aGLboolean
indicating whether the uniform block is referenced by the vertex shader. -
gl.UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER
: Returns aGLboolean
indicating 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
var 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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