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|
/*
/--------------------------------------------------------------------
|
| $Id: plmemsrc.cpp,v 1.6 2004/09/11 12:41:35 uzadow Exp $
| Memory Data Source Class
|
| This is a class which takes a memory region as a source of
| picture data.
| Original author: Patrick Strmstedt.
|
| Copyright (c) 1996-2002 Ulrich von Zadow
|
\--------------------------------------------------------------------
*/
#include "plmemsrc.h"
#include "plexcept.h"
PLMemSource::PLMemSource()
: PLDataSource (NULL), // No progress notification nessesary when
// reading from memory.
m_pCurPos(NULL),
m_pStartPos(0)
{
}
PLMemSource::~PLMemSource
()
{
if (m_pCurPos)
Close();
}
int PLMemSource::Open (unsigned char *pek, int size)
{
PLDataSource::Open ("Mem", size);
m_pCurPos = pek;
m_pStartPos = pek;
return 0;
}
void PLMemSource::Close
()
{
m_pCurPos = NULL;
PLDataSource::Close();
}
PLBYTE * PLMemSource::ReadNBytes
( int n
)
{
PLDataSource::ReadNBytes(n);
m_pCurPos += n;
return m_pCurPos-n;
}
PLBYTE * PLMemSource::ReadEverything
()
{
return m_pCurPos; // ;-)
}
void PLMemSource::Seek
( int n
)
{
m_pCurPos = m_pStartPos+n;
}
// Read but don't advance file pointer.
PLBYTE * PLMemSource::GetBufferPtr
( int MinBytesInBuffer
)
{
return m_pCurPos;
}
/*
/--------------------------------------------------------------------
|
| $Log: plmemsrc.cpp,v $
| Revision 1.6 2004/09/11 12:41:35 uzadow
| removed plstdpch.h
|
| Revision 1.5 2004/08/20 14:39:37 uzadow
| Added rle format to sgi decoder. Doesn't work yet, though.
|
| Revision 1.4 2002/03/31 13:36:42 uzadow
| Updated copyright.
|
| Revision 1.3 2001/10/16 17:12:26 uzadow
| Added support for resolution information (Luca Piergentili)
|
| Revision 1.2 2001/10/06 22:37:08 uzadow
| Linux compatibility.
|
| Revision 1.1 2001/09/16 19:03:22 uzadow
| Added global name prefix PL, changed most filenames.
|
| Revision 1.2 2001/02/04 14:31:52 uzadow
| Member initialization list cleanup (Erik Hoffmann).
|
| Revision 1.1 2000/03/17 10:51:38 Ulrich von Zadow
| no message
|
|
\--------------------------------------------------------------------
*/
|
