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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2011, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
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///////////////////////////////////////////////////////////////////////////
#ifndef IMFDEEPSCANLINEINPUTPART_H_
#define IMFDEEPSCANLINEINPUTPART_H_
#include "ImfMultiPartInputFile.h"
#include "ImfDeepScanLineInputFile.h"
#include "ImfDeepScanLineOutputFile.h"
#include "ImfNamespace.h"
#include "ImfExport.h"
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
class IMF_EXPORT DeepScanLineInputPart
{
public:
DeepScanLineInputPart(MultiPartInputFile& file, int partNumber);
//------------------------
// Access to the file name
//------------------------
const char * fileName () const;
//--------------------------
// Access to the file header
//--------------------------
const Header & header () const;
//----------------------------------
// Access to the file format version
//----------------------------------
int version () const;
//-----------------------------------------------------------
// Set the current frame buffer -- copies the FrameBuffer
// object into the InputFile object.
//
// The current frame buffer is the destination for the pixel
// data read from the file. The current frame buffer must be
// set at least once before readPixels() is called.
// The current frame buffer can be changed after each call
// to readPixels().
//-----------------------------------------------------------
void setFrameBuffer (const DeepFrameBuffer &frameBuffer);
//-----------------------------------
// Access to the current frame buffer
//-----------------------------------
const DeepFrameBuffer & frameBuffer () const;
//---------------------------------------------------------------
// Check if the file is complete:
//
// isComplete() returns true if all pixels in the data window are
// present in the input file, or false if any pixels are missing.
// (Another program may still be busy writing the file, or file
// writing may have been aborted prematurely.)
//---------------------------------------------------------------
bool isComplete () const;
//---------------------------------------------------------------
// Read pixel data:
//
// readPixels(s1,s2) reads all scan lines with y coordinates
// in the interval [min (s1, s2), max (s1, s2)] from the file,
// and stores them in the current frame buffer.
//
// Both s1 and s2 must be within the interval
// [header().dataWindow().min.y, header.dataWindow().max.y]
//
// The scan lines can be read from the file in random order, and
// individual scan lines may be skipped or read multiple times.
// For maximum efficiency, the scan lines should be read in the
// order in which they were written to the file.
//
// readPixels(s) calls readPixels(s,s).
//
// If threading is enabled, readPixels (s1, s2) tries to perform
// decopmression of multiple scanlines in parallel.
//
//---------------------------------------------------------------
void readPixels (int scanLine1, int scanLine2);
void readPixels (int scanLine);
void readPixels (const char * rawPixelData,const DeepFrameBuffer & frameBuffer,
int scanLine1,int scanLine2) const;
//----------------------------------------------
// Read a block of raw pixel data from the file,
// without uncompressing it (this function is
// used to implement OutputFile::copyPixels()).
//----------------------------------------------
void rawPixelData (int firstScanLine,
char * pixelData,
Int64 &pixelDataSize);
//-----------------------------------------------------------
// Read pixel sample counts into a slice in the frame buffer.
//
// readPixelSampleCounts(s1, s2) reads all the counts of
// pixel samples with y coordinates in the interval
// [min (s1, s2), max (s1, s2)] from the file, and stores
// them in the slice naming "sample count".
//
// Both s1 and s2 must be within the interval
// [header().dataWindow().min.y, header.dataWindow().max.y]
//
// readPixelSampleCounts(s) calls readPixelSampleCounts(s,s).
//-----------------------------------------------------------
void readPixelSampleCounts(int scanline1,
int scanline2);
void readPixelSampleCounts(int scanline);
void readPixelSampleCounts( const char * rawdata , const DeepFrameBuffer & frameBuffer,
int scanLine1 , int scanLine2) const;
int firstScanLineInChunk(int y) const;
int lastScanLineInChunk (int y) const;
private:
DeepScanLineInputFile *file;
// needed for copyPixels
friend void DeepScanLineOutputFile::copyPixels(DeepScanLineInputPart &);
};
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
#endif /* IMFDEEPSCANLINEINPUTPART_H_ */
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