/usr/include/ossim/imaging/ossimOverviewSequencer.h is in libossim-dev 1.7.21-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// License: See top level LICENSE.txt file.
//
// Author: David Burken
//
// Description: Class definition for sequencer for building overview files.
//
//----------------------------------------------------------------------------
// $Id: ossimOverviewSequencer.h 10269 2007-01-15 15:33:37Z dburken $
#ifndef ossimOverviewSequencer_HEADER
#define ossimOverviewSequencer_HEADER
#include <ossim/base/ossimReferenced.h>
#include <ossim/base/ossimConstants.h>
#include <ossim/base/ossimIpt.h>
#include <ossim/imaging/ossimImageHandler.h>
#include <ossim/imaging/ossimFilterResampler.h>
class ossimImageHandler;
/**
* @class Sequencer for building overview files.
*/
class OSSIM_DLL ossimOverviewSequencer : public ossimReferenced
{
public:
/** default constructor */
ossimOverviewSequencer();
/** virtual destructor */
virtual ~ossimOverviewSequencer();
/**
* @return The number of tiles within the area of interest.
*/
ossim_uint32 getNumberOfTiles()const;
/**
* @return The number of tiles along the x or horizontal direction.
*/
ossim_uint32 getNumberOfTilesHorizontal()const;
/**
* @return The number of tiles along the y or vertical direction.
*/
ossim_uint32 getNumberOfTilesVertical()const;
/**
* @brief Gets the zero-based image rectangle for the output reduced
* resolution data set (rrds).
*
* @param rect The rectangle to initialize.
*/
virtual void getOutputImageRectangle(ossimIrect& rect) const;
/**
* @brief Sets the input source or connection.
* @param input Pointer to ossimImageHandler.
* @note This object does not own the image handler.
*/
void setImageHandler(ossimImageHandler* input);
/**
* @brief Sets the input source resolution to decimate from.
* @param level The level to decimate.
*/
void setSourceLevel(ossim_uint32 level);
/**
* This must be called. We can only initialize this
* object completely if we know all connections
* are valid. Some other object drives this and so the
* connection's initialize will be called after. The job
* of this connection is to set up the sequence. It will
* default to the bounding rect. The area of interest can be
* set to some other rectagle (use setAreaOfInterest).
*/
virtual void initialize();
/**
* @brief Will set the internal pointers to the upperleft
* tile number. To go to the next tile in the sequence
* just call getNextTile.
*/
virtual void setToStartOfSequence();
/**
* Will allow you to get the next tile in the sequence.
* Note the last tile returned will be an invalid
* ossimRefPtr<ossimImageData>. Callers should be able to do:
*
* ossimRefPtr<ossimImageData> id = sequencer->getNextTile();
* while (id.valid())
* {
* doSomething;
* id = sequencer->getNextTile();
* }
*
*/
virtual ossimRefPtr<ossimImageData> getNextTile();
/**
* @brief This implementation does nothing. Derived slave would use this
* as a trigger to start resampling tiles.
*/
virtual void slaveProcessTiles();
/**
* @return Always true for this implementation.
*/
virtual bool isMaster()const;
/** @return The tile size. */
ossimIpt getTileSize() const;
/**
* @brief updated the tile size. This will update the number of horizontal
* and vertical tiles.
* @param pt The tile size. pt.x = width, pt.y = height
* @param height The tile height.
*/
void setTileSize(const ossimIpt& pt);
/**
* @brief Sets the resampling type.
*
* Supports BOX or NEAREST NEIGHBOR.
* When indexed you should probably use nearest neighbor.
* default = ossimFilterResampler::ossimFilterResampler_BOX
*
* @param resampleType The resampling method to use.
*/
void setResampleType(
ossimFilterResampler::ossimFilterResamplerType resampleType);
protected:
/**
* @brief Gets the image rectangle for the input tile for
* theCurrentTileNumber.
* @param inputRect The rectangle to initialize.
*/
void getInputTileRectangle(ossimIrect& inputRect) const;
/**
* @brief Gets the image rectangle for the output tile for
* theCurrentTileNumber.
* @param outputRect The rectangle to initialize.
*/
void getOutputTileRectangle(ossimIrect& outputRect) const;
/**
* @brief Updates theNumberOfTilesHorizontal and theNumberOfTilesVertical.
*
* This required theAreaOfInterest and theTileSize to be set.
*/
void updateTileDimensions();
/**
* Resamples a patch of data.
*/
void resampleTile(const ossimImageData* inputTile);
template <class T> void resampleTile(const ossimImageData* inputTile,
T dummy);
ossimImageHandler* theImageHandler;
ossimRefPtr<ossimImageData> theTile;
ossimIrect theAreaOfInterest;
ossimIpt theTileSize;
ossim_uint32 theNumberOfTilesHorizontal;
ossim_uint32 theNumberOfTilesVertical;
ossim_uint32 theCurrentTileNumber;
/** This is the resolution level to build overviews from. */
ossim_uint32 theSourceResLevel;
/** Dirty flag - if true, this object is not initialized. */
bool theDirtyFlag;
/** TODO make this handle any decimation. Right now hard coded to two. */
ossim_int32 theDecimationFactor;
/** Currently only handles NEAREST_NEIGHBOR and BOX (default = BOX) */
ossimFilterResampler::ossimFilterResamplerType theResampleType;
};
#endif /* #ifndef ossimOverviewSequencer_HEADER */
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