void ufoProcessIsRasterInDirty( ufoProcess process_instance, int input_index);
ufoProcessResetRasterInDirty resets dirty status of input, and may be called within ufoProcessRenderPixel, ufoProcessRenderLine, ufoProcessRenderRectangle, ufoProcessCanAvoidRendering, ufoProcessPreRender, ufoProcessPostRender, ufoProcessPreRenderPass, ufoProcessPostRenderPass, ufoProcessCalcDefinedRectangle, ufoProcessCalcNeedRectangles, ufoProcessCalcDefinedPixelTypes, and ufoProcessSpecifyConvertPixelTypes.
Autodesk Softimage v7.5