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Memory Allocation

You should use the UFO memory allocation mechanism to dynamically allocate and free memory. This will make use of the XSI Compositor’s memory manager. The functions ufoMalloc, ufoRealloc, and ufoFree have the same functionality as the malloc, realloc and free system calls.

Order of UFO Process User Function Calls

UFO user functions are called as follows:

XSI Compositor Initialization

ufoProcessDefine

UFO Process Instance Copy

ufoProcessCopyUserData

UFO Process Instance Destruction

ufoProcessDeleteUserData

UFO Process Instance Saving and Loading

ufoProcessWriteAsciiData 
ufoProcessReadAsciiData 
ufoProcessWriteBinaryData 
ufoProcessReadBinaryData 

Rendering Sequence

ufoProcessPreSequenceRender

:

   Rendering Frame f
   ufoProcessCanAvoidRendering
   ufoProcessCalcDefinedRectangle
   ufoProcessCalcDefinePixelType
   ufoProcessCalcNeedRectangles
   ufoProcessSpecifyConvertPixelTypes
   ufoProcessPreRender
   Render Pass 0

:

   Rendering Pass p
       ufoProcessPreRenderPass
       ufoProcessRenderRectangle
       [ufoProcessRenderRectangle ..]

(possibly rendered in tiles or slices)

or

       ufoProcessRenderLine ..
       [ufoProcessRenderLine ..]

or

       ufoProcessRenderPixel..
       [ufoProcessRenderPixel..]
       ufoProcessPostRenderPass
   Rendering Pass p+1
       :
       ufoProcessPostRender
   Render Frame f+1
       :
       ufoProcessPostSequenceRender

SOFTIMAGE|XSI v6.01     <     >