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http://code.google.com/p/rpcs3/source/detail?r=44

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DH 2012-11-15 01:39:56 +02:00
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wxWidgets/src/common/imagpnm.cpp Normal file
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/////////////////////////////////////////////////////////////////////////////
// Name: src/common/imagpnm.cpp
// Purpose: wxImage PNM handler
// Author: Sylvain Bougnoux
// RCS-ID: $Id: imagpnm.cpp 46311 2007-06-03 22:14:32Z VZ $
// Copyright: (c) Sylvain Bougnoux
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_IMAGE && wxUSE_PNM
#include "wx/imagpnm.h"
#ifndef WX_PRECOMP
#include "wx/intl.h"
#include "wx/log.h"
#endif
#include "wx/txtstrm.h"
//-----------------------------------------------------------------------------
// wxBMPHandler
//-----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxPNMHandler,wxImageHandler)
#if wxUSE_STREAMS
void Skip_Comment(wxInputStream &stream)
{
wxTextInputStream text_stream(stream);
if (stream.Peek()==wxT('#'))
{
text_stream.ReadLine();
Skip_Comment(stream);
}
}
bool wxPNMHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
{
wxUint32 width, height;
wxUint16 maxval;
char c(0);
image->Destroy();
/*
* Read the PNM header
*/
wxBufferedInputStream buf_stream(stream);
wxTextInputStream text_stream(buf_stream);
Skip_Comment(buf_stream);
if (buf_stream.GetC()==wxT('P')) c=buf_stream.GetC();
switch (c)
{
case wxT('2'): // ASCII Grey
case wxT('3'): // ASCII RGB
case wxT('5'): // RAW Grey
case wxT('6'): break;
default:
if (verbose) wxLogError(_("PNM: File format is not recognized."));
return false;
}
text_stream.ReadLine(); // for the \n
Skip_Comment(buf_stream);
text_stream >> width >> height ;
Skip_Comment(buf_stream);
text_stream >> maxval;
//cout << line << " " << width << " " << height << " " << maxval << endl;
image->Create( width, height );
unsigned char *ptr = image->GetData();
if (!ptr)
{
if (verbose)
wxLogError( _("PNM: Couldn't allocate memory.") );
return false;
}
if (c=='2') // Ascii GREY
{
wxUint32 value, size=width*height;
for (wxUint32 i=0; i<size; ++i)
{
value=text_stream.Read32();
if ( maxval != 255 )
value = (255 * value)/maxval;
*ptr++=(unsigned char)value; // R
*ptr++=(unsigned char)value; // G
*ptr++=(unsigned char)value; // B
if ( !buf_stream )
{
if (verbose) wxLogError(_("PNM: File seems truncated."));
return false;
}
}
}
if (c=='3') // Ascii RBG
{
wxUint32 value, size=3*width*height;
for (wxUint32 i=0; i<size; ++i)
{
//this is very slow !!!
//I wonder how we can make any better ?
value=text_stream.Read32();
if ( maxval != 255 )
value = (255 * value)/maxval;
*ptr++=(unsigned char)value;
if ( !buf_stream )
{
if (verbose) wxLogError(_("PNM: File seems truncated."));
return false;
}
}
}
if (c=='5') // Raw GREY
{
wxUint32 size=width*height;
unsigned char value;
for (wxUint32 i=0; i<size; ++i)
{
buf_stream.Read(&value,1);
if ( maxval != 255 )
value = (255 * value)/maxval;
*ptr++=value; // R
*ptr++=value; // G
*ptr++=value; // B
if ( !buf_stream )
{
if (verbose) wxLogError(_("PNM: File seems truncated."));
return false;
}
}
}
if ( c=='6' ) // Raw RGB
{
buf_stream.Read(ptr, 3*width*height);
if ( maxval != 255 )
{
for ( unsigned i = 0; i < 3*width*height; i++ )
ptr[i] = (255 * ptr[i])/maxval;
}
}
image->SetMask( false );
const wxStreamError err = buf_stream.GetLastError();
return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF;
}
bool wxPNMHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool WXUNUSED(verbose) )
{
wxTextOutputStream text_stream(stream);
//text_stream << "P6" << endl
//<< image->GetWidth() << " " << image->GetHeight() << endl
//<< "255" << endl;
text_stream << wxT("P6\n") << image->GetWidth() << wxT(" ") << image->GetHeight() << wxT("\n255\n");
stream.Write(image->GetData(),3*image->GetWidth()*image->GetHeight());
return stream.IsOk();
}
bool wxPNMHandler::DoCanRead( wxInputStream& stream )
{
Skip_Comment(stream);
if ( stream.GetC() == 'P' )
{
switch ( stream.GetC() )
{
case '2': // ASCII Grey
case '3': // ASCII RGB
case '5': // RAW Grey
case '6': // RAW RGB
return true;
}
}
return false;
}
#endif // wxUSE_STREAMS
#endif // wxUSE_IMAGE && wxUSE_PNM