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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012, Weta Digital Ltd
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///////////////////////////////////////////////////////////////////////////
#ifndef INCLUDED_IMF_COMPOSITEDEEPSCANLINE_H
#define INCLUDED_IMF_COMPOSITEDEEPSCANLINE_H
//-----------------------------------------------------------------------------
//
// Class to composite deep samples into a frame buffer
// Initialise with a deep input part or deep inputfile
// (also supports multiple files and parts, and will
// composite them together, as long as their sizes and channelmaps agree)
//
// Then call setFrameBuffer, and readPixels, exactly as for reading
// regular scanline images.
//
// Restrictions - source file(s) must contain at least Z and alpha channels
// - if multiple files/parts are provided, sizes must match
// - all requested channels will be composited as premultiplied
// - only half and float channels can be requested
//
// This object should not be considered threadsafe
//
// The default compositing engine will give spurious results with overlapping
// volumetric samples - you may derive from DeepCompositing class, override the
// sort_pixel() and composite_pixel() functions, and pass an instance to
// setCompositing().
//
//-----------------------------------------------------------------------------
#include "ImfForward.h"
#include "ImfNamespace.h"
#include "ImfExport.h"
#include <ImathBox.h>
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
class IMF_EXPORT CompositeDeepScanLine
{
public:
CompositeDeepScanLine();
virtual ~CompositeDeepScanLine();
/// set the source data as a part
///@note all parts must remain valid until after last interaction with DeepComp
void addSource(DeepScanLineInputPart * part);
/// set the source data as a file
///@note all file must remain valid until after last interaction with DeepComp
void addSource(DeepScanLineInputFile * file);
/////////////////////////////////////////
//
// set the frame buffer for output values
// the buffers specified must be large enough
// to handle the dataWindow()
//
/////////////////////////////////////////
void setFrameBuffer(const FrameBuffer & fr);
/////////////////////////////////////////
//
// retrieve frameBuffer
//
////////////////////////////////////////
const FrameBuffer & frameBuffer() const;
//////////////////////////////////////////////////
//
// read scanlines start to end from the source(s)
// storing the result in the frame buffer provided
//
//////////////////////////////////////////////////
void readPixels(int start,int end);
int sources() const; // return number of sources
/////////////////////////////////////////////////
//
// retrieve the datawindow
// If multiple parts are specified, this will
// be the union of the dataWindow of all parts
//
////////////////////////////////////////////////
const IMATH_NAMESPACE::Box2i & dataWindow() const;
//
// override default sorting/compositing operation
// (otherwise an instance of the base class will be used)
//
void setCompositing(DeepCompositing *);
struct Data;
private :
struct Data *_Data;
CompositeDeepScanLine(const CompositeDeepScanLine &); // not implemented
const CompositeDeepScanLine & operator=(const CompositeDeepScanLine &); // not implemented
};
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
#endif
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