home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Shareware BBS: 10 Tools
/
10-Tools.zip
/
wxos2233.zip
/
wxOS2-2_3_3.zip
/
wxWindows-2.3.3
/
src
/
common
/
imaggif.cpp
< prev
next >
Wrap
C/C++ Source or Header
|
2002-06-04
|
3KB
|
126 lines
/////////////////////////////////////////////////////////////////////////////
// Name: imaggif.cpp
// Purpose: wxGIFHandler
// Author: Vaclav Slavik & Guillermo Rodriguez Garcia
// RCS-ID: $Id: imaggif.cpp,v 1.35 2002/05/22 23:14:47 VZ Exp $
// Copyright: (c) 1999 Vaclav Slavik & Guillermo Rodriguez Garcia
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation "imaggif.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
# pragma hdrstop
#endif
#ifndef WX_PRECOMP
# include "wx/defs.h"
#endif
#if wxUSE_IMAGE && wxUSE_GIF
#include "wx/imaggif.h"
#include "wx/gifdecod.h"
#include "wx/wfstream.h"
#include "wx/log.h"
#include "wx/intl.h"
IMPLEMENT_DYNAMIC_CLASS(wxGIFHandler,wxImageHandler)
//-----------------------------------------------------------------------------
// wxGIFHandler
//-----------------------------------------------------------------------------
#if wxUSE_STREAMS
bool wxGIFHandler::LoadFile(wxImage *image, wxInputStream& stream,
bool verbose, int index)
{
wxGIFDecoder *decod;
int error;
bool ok = TRUE;
// image->Destroy();
decod = new wxGIFDecoder(&stream, TRUE);
error = decod->ReadGIF();
if ((error != wxGIF_OK) && (error != wxGIF_TRUNCATED))
{
if (verbose)
{
switch (error)
{
case wxGIF_INVFORMAT:
wxLogError(_("GIF: error in GIF image format."));
break;
case wxGIF_MEMERR:
wxLogError(_("GIF: not enough memory."));
break;
default:
wxLogError(_("GIF: unknown error!!!"));
break;
}
}
delete decod;
return FALSE;
}
if ((error == wxGIF_TRUNCATED) && verbose)
{
wxLogError(_("GIF: data stream seems to be truncated."));
/* go on; image data is OK */
}
if (index != -1)
{
// We're already on index = 0 by default. So no need
// to call GoFrame(0) then. On top of that GoFrame doesn't
// accept an index of 0. (Instead GoFirstFrame() should be used)
// Also if the gif image has only one frame, calling GoFrame(0)
// fails because GoFrame() only works with gif animations.
// (It fails if IsAnimation() returns FALSE)
// All valid reasons to NOT call GoFrame when index equals 0.
if (index != 0)
{
ok = decod->GoFrame(index);
}
}
if (ok)
{
ok = decod->ConvertToImage(image);
}
else
{
wxLogError(_("GIF: Invalid gif index."));
}
delete decod;
return ok;
}
bool wxGIFHandler::SaveFile( wxImage * WXUNUSED(image),
wxOutputStream& WXUNUSED(stream), bool verbose )
{
if (verbose)
wxLogDebug(wxT("GIF: the handler is read-only!!"));
return FALSE;
}
bool wxGIFHandler::DoCanRead( wxInputStream& stream )
{
wxGIFDecoder decod(&stream);
return decod.CanRead();
}
#endif // wxUSE_STREAMS
#endif // wxUSE_GIF