EVOLUTION-MANAGER

Edit File: cpcidskbitmap.cpp

/******************************************************************************
 *
 * Purpose:  Implementation of the CPCIDSKBitmap class.
 * 
 ******************************************************************************
 * Copyright (c) 2010
 * 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.
 ****************************************************************************/

#include "pcidsk_exception.h"
#include "segment/cpcidskbitmap.h"
#include "pcidsk_file.h"
#include "core/pcidsk_utils.h"
#include <cassert>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <cctype>

#include "cpl_port.h"

using namespace PCIDSK;

/************************************************************************/
/*                           CPCIDSKBitmap()                            */
/************************************************************************/

CPCIDSKBitmap::CPCIDSKBitmap( PCIDSKFile *fileIn, int segmentIn,
                              const char *segment_pointer )
        : CPCIDSKSegment( fileIn, segmentIn, segment_pointer )

{
    loaded = false;
    width = 0;
    height = 0;
    block_width = 0;
    block_height = 0;
}

/************************************************************************/
/*                           ~CPCIDSKBitmap()                           */
/************************************************************************/

CPCIDSKBitmap::~CPCIDSKBitmap()

{
}

/************************************************************************/
/*                             Initialize()                             */
/*                                                                      */
/*      Set up a newly created bitmap segment.  We just need to         */
/*      write some stuff into the segment header.                       */
/************************************************************************/

void CPCIDSKBitmap::Initialize()

{
    loaded = false;

CPCIDSKBitmap *pThis = (CPCIDSKBitmap *) this;

PCIDSKBuffer &bheader = pThis->GetHeader();

bheader.Put( 0, 160     , 16 );
    bheader.Put( 0, 160+16*1, 16 );
    bheader.Put( file->GetWidth(), 160+16*2, 16 );
    bheader.Put( file->GetHeight(), 160+16*3, 16 );
    bheader.Put( -1, 160+16*4, 16 );

file->WriteToFile( bheader.buffer, data_offset, 1024 );
}

/************************************************************************/
/*                                Load()                                */
/************************************************************************/

void CPCIDSKBitmap::Load() const

{
    if( loaded )
        return;

// We don't really mean the internals are const, just a lie to 
    // keep the const interfaces happy.

CPCIDSKBitmap *pThis = (CPCIDSKBitmap *) this;

PCIDSKBuffer &bheader = pThis->GetHeader();

pThis->width  = bheader.GetInt( 192,    16 );
    pThis->height = bheader.GetInt( 192+16, 16 );

// Choosing 8 lines per block ensures that each block 
    // starts on a byte boundary.
    pThis->block_width = pThis->width;
    pThis->block_height = 8;

pThis->loaded = true;
}

/************************************************************************/
/*                           GetBlockWidth()                            */
/************************************************************************/

int CPCIDSKBitmap::GetBlockWidth() const