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/******************************************************************************
*
* Purpose: Declaration of the SysBlockMap class.
*
* This class is used to manage access to the SYS virtual block map segment
* (named SysBMDir). This segment is used to keep track of one or more
* virtual files stored in SysBData segments. These virtual files are normally
* used to hold tiled images for primary bands or overviews.
*
* This class is closely partnered with the SysVirtualFile class, and the
* primary client is the CTiledChannel class.
*
******************************************************************************
* Copyright (c) 2009
* PCI Geomatics, 50 West Wilmot Street, Richmond Hill, Ont, Canada
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#ifndef __INCLUDE_SEGMENT_SYSBLOCKMAP_H
#define __INCLUDE_SEGMENT_SYSBLOCKMAP_H
#include "pcidsk_config.h"
#include "pcidsk_types.h"
#include "pcidsk_segment.h"
#include "segment/cpcidsksegment.h"
namespace PCIDSK
{
class SysVirtualFile;
class PCIDSKFile;
/************************************************************************/
/* SysBlockMap */
/************************************************************************/
class SysBlockMap : virtual public CPCIDSKSegment
{
public:
SysBlockMap( PCIDSKFile *file, int segment,const char *segment_pointer );
virtual ~SysBlockMap();
virtual void Synchronize();
virtual void Initialize();
SysVirtualFile *GetVirtualFile( int image );
int CreateVirtualFile();
int CreateVirtualImageFile( int width, int height,
int block_width, int block_height,
eChanType chan_type,
std::string compression );
int GrowVirtualFile( int image, int &last_block,
int &block_segment_ret );
void SetVirtualFileSize( int image, uint64 file_length );
int GetNextBlockMapEntry( int bm_index,
uint16 &segment,
int &block_in_segment );
private:
bool partial_loaded;
bool full_loaded;
bool dirty;
void PartialLoad();
void FullLoad();
void AllocateBlocks();
PCIDSKBuffer layer_data; // only if partial_loaded
PCIDSKBuffer blockmap_data; // only if full_loaded.
int block_count;
int first_free_block;
int growing_segment;
std::vector<SysVirtualFile*> virtual_files;
};
} // end namespace PCIDSK
#endif // __INCLUDE_SEGMENT_SYSBLOCKMAP_H
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