696 lines
19 KiB
C++
696 lines
19 KiB
C++
//---------------------------------------------------------------
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// File: pcximage.cpp
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//
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// Image manipulation functions for PCX format images.
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//---------------------------------------------------------------
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#include "stdafx.h"
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#include "global.h"
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#include "pbrush.h"
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#include "pbrusfrm.h"
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#include "pbrusvw.h"
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#include "minifwnd.h"
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#include "bmobject.h"
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#include "imgsuprt.h"
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#include "imgwnd.h"
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#include "imgbrush.h"
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#include "imgwell.h"
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#include "imgtools.h"
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#include "toolbox.h"
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#include "imgfile.h"
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#include "imgcolor.h"
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#include "undo.h"
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#include "props.h"
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#include "ferr.h"
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#include "ctype.h"
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#include "cmpmsg.h"
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#define COLORMAPLENGTH 48
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#define FILLERLENGTH 58
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#ifdef PCX_SUPPORT
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struct PCXHeader
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{
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unsigned char manufacturer;
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unsigned char version;
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unsigned char encoding;
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unsigned char bits_per_pixel_per_plane;
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short xmin;
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short ymin;
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short xmax;
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short ymax;
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unsigned short hresolution;
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unsigned short vresolution;
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unsigned char colormap[COLORMAPLENGTH];
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unsigned char reserved;
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unsigned char nplanes;
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unsigned short bytes_per_line;
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short palette_info;
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unsigned char filler[FILLERLENGTH]; // Header is 128 bytes
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};
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#endif
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class CFileBuffer : public CObject
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{
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DECLARE_DYNCREATE( CFileBuffer )
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public:
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enum Type
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{
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READ,
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WRITE
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};
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CFileBuffer();
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~CFileBuffer();
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BOOL Create( CFile* pfile, Type IO );
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short Get ( void );
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BOOL Put ( BYTE cByte );
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long Seek ( long lOff, UINT nFrom );
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BOOL Flush ( void );
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private:
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void Fill ( void );
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enum { MAX_BUFFER = 2048 };
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CFile* m_pFile;
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int m_iBuffPos;
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int m_iBuffSize;
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BYTE* m_pBuffer;
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};
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IMPLEMENT_DYNCREATE( CFileBuffer, CObject )
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#include "memtrace.h"
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/****************************************************************************/
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CFileBuffer::CFileBuffer() : CObject()
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{
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m_pFile = 0;
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m_iBuffPos = 0;
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m_iBuffSize = 0;
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m_pBuffer = 0;
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}
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/****************************************************************************/
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CFileBuffer::~CFileBuffer()
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{
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if (m_pBuffer)
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delete [] m_pBuffer;
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}
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/****************************************************************************/
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BOOL CFileBuffer::Create( CFile* pfile, Type IO )
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{
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ASSERT( pfile != NULL );
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if (pfile == NULL)
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return FALSE;
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m_pFile = pfile;
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m_pBuffer = new BYTE[MAX_BUFFER];
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if (! m_pBuffer)
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{
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theApp.SetMemoryEmergency();
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return FALSE;
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}
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if (IO == READ)
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{
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Fill();
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if (! m_iBuffSize)
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{
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theApp.SetFileError( IDS_ERROR_READLOAD, ferrIllformedFile );
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return FALSE;
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}
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}
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return TRUE;
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}
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/****************************************************************************/
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short CFileBuffer::Get( void )
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{
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if (! m_iBuffSize)
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return EOF;
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short sByte = (short)(unsigned short)m_pBuffer[m_iBuffPos++];
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if (m_iBuffPos == m_iBuffSize)
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Fill();
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return sByte;
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}
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/****************************************************************************/
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BOOL CFileBuffer::Put( BYTE cByte )
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{
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m_pBuffer[m_iBuffSize++] = cByte;
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if (m_iBuffSize == MAX_BUFFER)
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return Flush();
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return TRUE;
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}
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/****************************************************************************/
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long CFileBuffer::Seek( long lOff, UINT nFrom )
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{
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long lPos = m_pFile->Seek( lOff, nFrom );
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Fill();
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return lPos;
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}
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/****************************************************************************/
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void CFileBuffer::Fill()
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{
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m_iBuffSize = m_pFile->Read( m_pBuffer, MAX_BUFFER );
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m_iBuffPos = 0;
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}
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/****************************************************************************/
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BOOL CFileBuffer::Flush( void )
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{
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TRY {
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m_pFile->Write( m_pBuffer, m_iBuffSize );
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}
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CATCH( CFileException, ex )
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{
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m_pFile->Abort();
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theApp.SetFileError( IDS_ERROR_SAVE, ex->m_cause );
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return FALSE;
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}
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END_CATCH
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m_iBuffSize = 0;
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return TRUE;
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}
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/****************************************************************************/
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/****************************************************************************/
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#ifdef PCX_SUPPORT
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BOOL CBitmapObj::ReadPCX( CFile* pfile )
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{
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if (! pfile->GetLength())
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{
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if (m_hThing)
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Free();
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m_bDirty = TRUE;
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return TRUE;
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}
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// if a PCX extension try to load this as a PCX image.
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PCXHeader hdr;
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PBITMAP p_dib; // Device independent bitmap
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short bytes_per_line;
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pfile->Read( (unsigned char*)&hdr, sizeof( PCXHeader ) );
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// Check if image file format is acceptable
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if (hdr.manufacturer != 0x0a)
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{
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theApp.SetFileError( IDS_ERROR_READLOAD, ferrCantDetermineType );
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return FALSE;
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}
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// We only handle 1, 4, 8, or 24-bit images
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short bits_per_pixel = hdr.nplanes * hdr.bits_per_pixel_per_plane;
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if (bits_per_pixel != 1
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&& bits_per_pixel != 4
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&& bits_per_pixel != 8
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&& bits_per_pixel != 24)
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{
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theApp.SetFileError( IDS_ERROR_READLOAD, ferrCantDetermineType );
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return FALSE;
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}
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short image_width = hdr.xmax - hdr.xmin + 1;
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short image_height = hdr.ymax - hdr.ymin + 1;
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// Allocate space where the PCX image will be unpacked.
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long pcx_image_size = (long) hdr.nplanes *
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(long) image_height *
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(long) hdr.bytes_per_line;
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BYTE* image = (BYTE*) new BYTE[pcx_image_size];
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if (image == NULL)
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{
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theApp.SetMemoryEmergency();
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return FALSE;
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}
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// Read in PCX image into this area.
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CFileBuffer FileBuffer;
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if (! FileBuffer.Create( pfile, CFileBuffer::READ ))
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{
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delete [] image;
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return FALSE;
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}
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// Decode run-length encoded image data
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short i;
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short byte;
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short count;
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long pos = 0L;
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while ((byte = FileBuffer.Get()) != EOF)
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{
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if ((byte & 0xc0) == 0xc0)
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{
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count = byte & 0x3f;
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if ((byte = FileBuffer.Get()) != EOF)
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{
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for (i = 0; i < count; i++)
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{
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if (pos >= pcx_image_size)
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break;
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image[pos] = (CHAR)byte;
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pos++;
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}
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}
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}
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else
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{
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if (pos >= pcx_image_size)
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break;
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image[pos] = (CHAR)byte;
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pos++;
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}
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}
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// Allocate memory for the device independent bitmap (DIB)
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// Note that the number of bytes in each line of a DIB image
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// must be a multiple of 4.
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short bytes_per_line_per_plane = (image_width *
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hdr.bits_per_pixel_per_plane + 7) / 8;
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short actual_bytes_per_line = (image_width *
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hdr.nplanes *
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hdr.bits_per_pixel_per_plane + 7) / 8;
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bytes_per_line = actual_bytes_per_line;
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if ( bytes_per_line % 4)
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bytes_per_line = 4 * ( bytes_per_line / 4 + 1);
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// Make room for a palette
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short palettesize = 16;
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if (bits_per_pixel == 1)
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palettesize = 2;
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if (hdr.version >= 5
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&& bits_per_pixel > 4)
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{
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// Go back 769 bytes from the end of the file
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FileBuffer.Seek( -769, CFile::end );
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if (FileBuffer.Get() == 12)
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{
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// There is a 256-color palette following this byte
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palettesize = 256;
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}
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}
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// If image has more than 256 colors then there is no palette
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if (bits_per_pixel > 8)
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palettesize = 0;
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// Allocate space for the bitmap
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if (m_hThing)
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Free();
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m_lMemSize = sizeof( BITMAPINFOHEADER ) + palettesize * sizeof( RGBQUAD )
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+ (long)bytes_per_line * (long)image_height;
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if (! Alloc())
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return FALSE;
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p_dib = (PBITMAP) GlobalLock(m_hThing);
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// Set up bitmap info header
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LPBITMAPINFOHEADER p_bminfo = (LPBITMAPINFOHEADER)p_dib;
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p_bminfo->biSize = sizeof(BITMAPINFOHEADER);
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p_bminfo->biWidth = image_width;
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p_bminfo->biHeight = image_height;
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p_bminfo->biPlanes = 1;
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p_bminfo->biBitCount = hdr.bits_per_pixel_per_plane * hdr.nplanes;
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p_bminfo->biCompression = BI_RGB;
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p_bminfo->biSizeImage = (long)image_height * (long) bytes_per_line;
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p_bminfo->biXPelsPerMeter = (long)hdr.hresolution;
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p_bminfo->biYPelsPerMeter = (long)hdr.vresolution;
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p_bminfo->biClrUsed = 0;
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p_bminfo->biClrImportant = 0;
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// Set up the color palette
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if (palettesize > 0)
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{
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//***** RGBQUAD *palette = (RGBQUAD*) ((LPSTR)imdata->p_dib
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LPRGBQUAD palette = LPRGBQUAD((LPSTR)p_dib + sizeof(BITMAPINFOHEADER));
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short palindex;
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for (palindex = 0; palindex < palettesize; palindex++)
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{
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if (palettesize == 256)
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{
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// Read palette from file
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palette[palindex].rgbRed = (BYTE)FileBuffer.Get();
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palette[palindex].rgbGreen = (BYTE)FileBuffer.Get();
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palette[palindex].rgbBlue = (BYTE)FileBuffer.Get();
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palette[palindex].rgbReserved = 0;
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}
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if (palettesize == 16)
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{
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// 16-color palette from PCX header
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palette[palindex].rgbRed = (BYTE)hdr.colormap[3*palindex];
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palette[palindex].rgbGreen = (BYTE)hdr.colormap[3*palindex+1];
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palette[palindex].rgbBlue = (BYTE)hdr.colormap[3*palindex+2];
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palette[palindex].rgbReserved = 0;
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}
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if (palettesize == 2)
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{
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// Set up palette for black and white images
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palette[palindex].rgbRed = palindex * 255;
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palette[palindex].rgbGreen = palindex * 255;
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palette[palindex].rgbBlue = palindex * 255;
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palette[palindex].rgbReserved = 0;
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}
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}
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}
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// Load image data into the DIB. Note the DIB image must be
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// stored "bottom to top" line order. That's why we position
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// data at the end of the array so that the image can be
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// stored backwards--from the last line to the first.
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BYTE* data = (BYTE*)p_dib + ((long)sizeof( BITMAPINFOHEADER )
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+ palettesize * sizeof( RGBQUAD )
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+ (image_height - 1) * bytes_per_line);
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// Define a macro to access bytes in the PCX image according
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// to specified line and plane index.
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short lineindex, byteindex, planeindex;
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#define bytepos(lineindex, planeindex, byteindex) \
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((long)(lineindex)*(long)hdr.bytes_per_line* \
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(long)hdr.nplanes + \
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(long)(planeindex)*(long)hdr.bytes_per_line + \
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(long)(byteindex))
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// Construct packed pixels out of decoded PCX image.
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short loc;
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unsigned short onebyte;
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unsigned short bits_copied;
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unsigned short few_bits;
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unsigned short k;
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unsigned short bbpb = 8/hdr.bits_per_pixel_per_plane;
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// Build a mask to pick out bits from each byte of the PCX image
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unsigned short himask = 0x80, mask;
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if (hdr.bits_per_pixel_per_plane > 1)
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for (i = 0; i < hdr.bits_per_pixel_per_plane - 1;
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i++) himask = 0x80 | (himask >> 1);
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for (lineindex = 0; lineindex < image_height;
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lineindex++, data -= bytes_per_line)
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{
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if (actual_bytes_per_line < bytes_per_line)
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for (loc = actual_bytes_per_line; loc < bytes_per_line; loc++)
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data[loc] = 0;
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loc = 0;
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onebyte = 0;
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bits_copied = 0;
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for (byteindex = 0; byteindex < bytes_per_line_per_plane; byteindex++)
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{
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for (k = 0, mask = himask; k < bbpb; k++,
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mask >>= hdr.bits_per_pixel_per_plane)
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{
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// Go through all scan line for all planes and copy bits into
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// the data array
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for (planeindex = 0; planeindex < hdr.nplanes; planeindex++)
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{
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few_bits = image[bytepos(lineindex,
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planeindex, byteindex)] & mask;
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// Shift the selected bits to the most significant position
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if (k > 0)
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few_bits <<= (k*hdr.bits_per_pixel_per_plane);
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// OR the bits with current pixel after shifting them right
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if (bits_copied > 0)
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few_bits >>= bits_copied;
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onebyte |= few_bits;
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bits_copied += hdr.bits_per_pixel_per_plane;
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if (bits_copied >= 8)
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{
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data[loc] = (UCHAR)onebyte;
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loc++;
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bits_copied = 0;
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onebyte = 0;
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}
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}
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}
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}
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}
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// Success!
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delete [] (BYTE*)image;
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GlobalUnlock(m_hThing);
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return TRUE;
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}
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/****************************************************************************/
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#define WIDTHBYTES(bits) ((((bits) + 31) / 32) * 4)
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BOOL CBitmapObj::WritePCX( CFile* pfile )
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{
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if (m_pImg == NULL)
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{
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// The image has not been loaded, so we'll just copy the
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// original out to the file...
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ASSERT( m_hThing );
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if (! m_hThing)
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return FALSE;
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}
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else
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{
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// The image has been loaded and may have been edited, so
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// we'll convert it back to a dib to save...
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if (! m_hThing)
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SaveResource( FALSE );
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if (! m_hThing)
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return FALSE;
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}
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// build pcx file from the DIB
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PBITMAP p_dib = (PBITMAP)GlobalLock(m_hThing); // Device independent bitmap
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PCXHeader hdr; // PCX bitmap header
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LPBITMAPINFOHEADER p_bminfo = (LPBITMAPINFOHEADER)p_dib; // Set up bitmap info header
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short palettesize = DIBNumColors( (LPSTR)p_dib); // Get palette size
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hdr.manufacturer = 10;
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// hdr.version = (char)((hPalette || (GetDeviceCaps(fileDC, RASTERCAPS) & RC_PALETTE)) ? 5 : 3);
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hdr.version = (CHAR)( palettesize ? 5 : 3);
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hdr.encoding = 1;
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hdr.xmin = hdr.ymin = 0;
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hdr.xmax = p_bminfo->biWidth - 1;
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hdr.ymax = p_bminfo->biHeight- 1;
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// hdr.hresolution = theApp.ScreenDeviceInfo.iWidthinPels;
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// hdr.vresolution = theApp.ScreenDeviceInfo.iHeightinPels;
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hdr.hresolution = (WORD)p_bminfo->biXPelsPerMeter;
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hdr.vresolution = (WORD)p_bminfo->biYPelsPerMeter;
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hdr.reserved = 0;
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hdr.nplanes = (BYTE)p_bminfo->biPlanes; //biPlanes should always be 1
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hdr.palette_info = (BYTE)p_dib->bmWidthBytes;
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hdr.bits_per_pixel_per_plane = (CHAR) p_bminfo->biBitCount;
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hdr.bytes_per_line = WIDTHBYTES( (LONG) (p_bminfo->biBitCount * p_bminfo->biWidth) );
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// Clean up filler
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for (int index = FILLERLENGTH; index--; )
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hdr.filler[index] ='\0';
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// If there are at most 16 colors place them in header
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LPRGBQUAD palette = LPRGBQUAD((LPSTR)p_dib + sizeof(BITMAPINFOHEADER));
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LPSTR lpDst = (LPSTR)hdr.colormap;
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// Clean up colormap
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for (index = COLORMAPLENGTH; index--; )
|
|
lpDst[index] ='\0';
|
|
|
|
if (palettesize <= 16)
|
|
for (index = palettesize; index--; )
|
|
{
|
|
*lpDst++ = palette->rgbRed; /* swap RED and BLUE components */
|
|
*lpDst++ = palette->rgbGreen;
|
|
*lpDst++ = palette->rgbBlue;
|
|
palette++;
|
|
}
|
|
|
|
pfile->Write( (unsigned char*)&hdr, sizeof( PCXHeader ) );
|
|
|
|
// Now pack the image
|
|
|
|
// Load image data from the DIB. Note the DIB image is
|
|
// stored "bottom to top" line order. That's why we position
|
|
// data at the end of the array so that the image can be
|
|
// stored backwards--from the last line to the first.
|
|
|
|
CFileBuffer FileBuffer;
|
|
|
|
if (! FileBuffer.Create( pfile, CFileBuffer::WRITE ))
|
|
{
|
|
GlobalUnlock(m_hThing);
|
|
return FALSE;
|
|
}
|
|
|
|
// find the start of the bitmap data then go to the end of the data
|
|
// the PCX is stored in reverse order of the DIB
|
|
int TopofData = sizeof( BITMAPINFOHEADER ) + palettesize * sizeof( RGBQUAD );
|
|
BYTE* data = (BYTE*)p_dib + TopofData + hdr.bytes_per_line * (p_bminfo->biHeight );
|
|
|
|
for (index = p_bminfo->biHeight; index--; )
|
|
{
|
|
data -= hdr.bytes_per_line;
|
|
|
|
if (! PackBuff( &FileBuffer, data, hdr.bytes_per_line )) //convert to run length encoding.
|
|
{
|
|
GlobalUnlock(m_hThing);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
if (palettesize == 256) // Write palette to file
|
|
{
|
|
if (! FileBuffer.Put( 12 )) // Tag number for palette information
|
|
{
|
|
GlobalUnlock(m_hThing);
|
|
return FALSE;
|
|
}
|
|
|
|
for (index = 0; index < palettesize; index++)
|
|
{
|
|
if (! FileBuffer.Put( palette[index].rgbRed )
|
|
|| ! FileBuffer.Put( palette[index].rgbGreen )
|
|
|| ! FileBuffer.Put( palette[index].rgbBlue ))
|
|
{
|
|
GlobalUnlock(m_hThing);
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
GlobalUnlock(m_hThing);
|
|
return FileBuffer.Flush();
|
|
}
|
|
|
|
#endif //PCX_SUPPORT
|
|
|
|
/****************************************************************************/
|
|
|
|
/* run length encoding equates */
|
|
#define MINcount 2
|
|
#define MAXcount 63
|
|
#define ESCbits 0xC0
|
|
#define BUFFER_SIZE 1024
|
|
|
|
/* bitmaps are ordered <b, g, r, i> but PCX is ordered <r, g, b, i> ... */
|
|
|
|
BOOL CBitmapObj::PackBuff(CFileBuffer *FileBuffer, BYTE *PtrDib, int byteWidth )
|
|
{
|
|
BYTE runChar;
|
|
BYTE runCount;
|
|
BYTE* endPtr = PtrDib + byteWidth;
|
|
|
|
for (runCount = 1, runChar = *PtrDib++; PtrDib <= endPtr; ++PtrDib)
|
|
{
|
|
if (PtrDib != endPtr && *PtrDib == runChar && runCount < MAXcount)
|
|
++runCount;
|
|
else
|
|
if (*PtrDib != runChar
|
|
&& runCount < MINcount
|
|
&& (runChar & ESCbits) != ESCbits)
|
|
{
|
|
while (runCount--)
|
|
if (! FileBuffer->Put( runChar ))
|
|
return FALSE;
|
|
|
|
runCount = 1;
|
|
runChar = *PtrDib;
|
|
}
|
|
else
|
|
{
|
|
runCount |= ESCbits;
|
|
|
|
if (! FileBuffer->Put( runCount )
|
|
|| ! FileBuffer->Put( runChar ))
|
|
return FALSE;
|
|
|
|
runCount = 1;
|
|
runChar = *PtrDib;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/****************************************************************************/
|