src/common/imaggif.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        imaggif.cpp
   3 // Purpose:     wxGIFHandler
   4 // Author:      Vaclav Slavik
   5 //              Based on wxGIFDecoder by Guillermo Rodriguez Garcia
   6 // RCS-ID:      $Id$
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 /*
  11   We don't put pragma implement in this file because it is already present in
  12   src/common/image.cpp
  13 */
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include <wx/wxprec.h>
  17
  18 #ifdef __BORLANDC__
  19 #  pragma hdrstop
  20 #endif
  21
  22 #ifndef WX_PRECOMP
  23 #  include "wx/defs.h"
  24 #endif
  25
  26 #include "wx/image.h"
  27 #include "wx/gifdecod.h"
  28 #include "wx/wfstream.h"
  29 #include "wx/module.h"
  30 #include "wx/log.h"
  31
  32 IMPLEMENT_DYNAMIC_CLASS(wxGIFHandler,wxImageHandler)
  33
  34 #if wxUSE_STREAMS
  35
  36 //-----------------------------------------------------------------------------
  37 // wxGIFHandler
  38 //-----------------------------------------------------------------------------
  39
  40 bool wxGIFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSED(verbose) )
  41 {
  42     wxGIFDecoder *decod;
  43     bool ok;
  44
  45     decod = new wxGIFDecoder(&stream, TRUE);
  46
  47     if (decod->ReadGIF() != E_OK)
  48     {
  49         wxLogDebug(_T("Error reading GIF"));
  50         delete decod;
  51         return FALSE;
  52     }
  53
  54     image->Destroy();
  55     ok = decod->ConvertToImage(image);
  56
  57     delete decod;
  58     return ok;
  59 }
  60
  61 bool wxGIFHandler::SaveFile( wxImage * WXUNUSED(image),
  62                              wxOutputStream& WXUNUSED(stream), bool verbose )
  63 {
  64     if (verbose) wxLogDebug(_T("wxGIFHandler is read-only!!"));
  65     return FALSE;
  66 }
  67
  68 bool wxGIFHandler::CanRead( wxInputStream& stream )
  69 {
  70     wxGIFDecoder *decod;
  71     bool ok;
  72
  73     decod = new wxGIFDecoder(&stream);
  74     ok = decod->CanRead();
  75
  76     delete decod;
  77     return ok;
  78 }
  79
  80 #endif