7beb59f36c
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29155 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
126 lines
3.2 KiB
C++
126 lines
3.2 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: imaggif.cpp
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// Purpose: wxGIFHandler
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// Author: Vaclav Slavik & Guillermo Rodriguez Garcia
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// RCS-ID: $Id$
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// Copyright: (c) 1999 Vaclav Slavik & Guillermo Rodriguez Garcia
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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#pragma implementation "imaggif.h"
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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# pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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# include "wx/defs.h"
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#endif
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#if wxUSE_IMAGE && wxUSE_GIF
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#include "wx/imaggif.h"
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#include "wx/gifdecod.h"
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#include "wx/wfstream.h"
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#include "wx/log.h"
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#include "wx/intl.h"
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IMPLEMENT_DYNAMIC_CLASS(wxGIFHandler,wxImageHandler)
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//-----------------------------------------------------------------------------
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// wxGIFHandler
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//-----------------------------------------------------------------------------
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#if wxUSE_STREAMS
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bool wxGIFHandler::LoadFile(wxImage *image, wxInputStream& stream,
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bool verbose, int index)
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{
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wxGIFDecoder *decod;
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int error;
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bool ok = true;
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// image->Destroy();
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decod = new wxGIFDecoder(&stream, true);
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error = decod->ReadGIF();
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if ((error != wxGIF_OK) && (error != wxGIF_TRUNCATED))
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{
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if (verbose)
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{
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switch (error)
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{
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case wxGIF_INVFORMAT:
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wxLogError(_("GIF: error in GIF image format."));
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break;
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case wxGIF_MEMERR:
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wxLogError(_("GIF: not enough memory."));
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break;
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default:
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wxLogError(_("GIF: unknown error!!!"));
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break;
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}
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}
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delete decod;
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return false;
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}
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if ((error == wxGIF_TRUNCATED) && verbose)
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{
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wxLogError(_("GIF: data stream seems to be truncated."));
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/* go on; image data is OK */
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}
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if (index != -1)
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{
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// We're already on index = 0 by default. So no need
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// to call GoFrame(0) then. On top of that GoFrame doesn't
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// accept an index of 0. (Instead GoFirstFrame() should be used)
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// Also if the gif image has only one frame, calling GoFrame(0)
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// fails because GoFrame() only works with gif animations.
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// (It fails if IsAnimation() returns false)
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// All valid reasons to NOT call GoFrame when index equals 0.
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if (index != 0)
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{
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ok = decod->GoFrame(index);
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}
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}
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if (ok)
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{
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ok = decod->ConvertToImage(image);
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}
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else
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{
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wxLogError(_("GIF: Invalid gif index."));
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}
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delete decod;
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return ok;
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}
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bool wxGIFHandler::SaveFile( wxImage * WXUNUSED(image),
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wxOutputStream& WXUNUSED(stream), bool verbose )
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{
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if (verbose)
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wxLogDebug(wxT("GIF: the handler is read-only!!"));
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return false;
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}
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bool wxGIFHandler::DoCanRead( wxInputStream& stream )
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{
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wxGIFDecoder decod(&stream);
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return decod.CanRead();
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}
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#endif // wxUSE_STREAMS
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#endif // wxUSE_GIF
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