destroy() Destroys the filter and removes it from the filter stack. Source code:

applyFilterPass(filter, filterArea, width, height) Applies the filter to the specified area. Parameters

initShaderBuffers() Initialises the shader buffers. Source code:

setContext(gl) Initialises the context and the properties. Parameters

offsetY : number Source code:

offsetX : number Source code:

pushFilter(filterBlock) Applies the filter and adds it to the current filter stack. Parameters

begin(renderSession, buffer) Parameters Name Type Description

popFilter() Removes the last filter from the filter stack and doesn't return it. Source

new WebGLFilterManager() Source code: