1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/imaggif.cpp
3 // Purpose: wxGIFHandler
4 // Author: Vaclav Slavik & Guillermo Rodriguez Garcia
5 // RCS-ID: $Id: imaggif.cpp 41819 2006-10-09 17:51:07Z VZ $
6 // Copyright: (c) 1999 Vaclav Slavik & Guillermo Rodriguez Garcia
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10 // For compilers that support precompilation, includes "wx.h".
11 #include "wx/wxprec.h"
12
13 #ifdef __BORLANDC__
14 #pragma hdrstop
15 #endif
16
17 #if wxUSE_IMAGE && wxUSE_GIF
18
19 #ifndef WX_PRECOMP
20 #include "wx/intl.h"
21 #include "wx/log.h"
22 #endif
23
24 #include "wx/imaggif.h"
25 #include "wx/gifdecod.h"
26 #include "wx/wfstream.h"
27
IMPLEMENT_DYNAMIC_CLASS(wxGIFHandler,wxImageHandler)28 IMPLEMENT_DYNAMIC_CLASS(wxGIFHandler,wxImageHandler)
29
30 //-----------------------------------------------------------------------------
31 // wxGIFHandler
32 //-----------------------------------------------------------------------------
33
34 #if wxUSE_STREAMS
35
36 bool wxGIFHandler::LoadFile(wxImage *image, wxInputStream& stream,
37 bool verbose, int index)
38 {
39 wxGIFDecoder *decod;
40 wxGIFErrorCode error;
41 bool ok = true;
42
43 // image->Destroy();
44 decod = new wxGIFDecoder();
45 error = decod->LoadGIF(stream);
46
47 if ((error != wxGIF_OK) && (error != wxGIF_TRUNCATED))
48 {
49 if (verbose)
50 {
51 switch (error)
52 {
53 case wxGIF_INVFORMAT:
54 wxLogError(_("GIF: error in GIF image format."));
55 break;
56 case wxGIF_MEMERR:
57 wxLogError(_("GIF: not enough memory."));
58 break;
59 default:
60 wxLogError(_("GIF: unknown error!!!"));
61 break;
62 }
63 }
64 delete decod;
65 return false;
66 }
67
68 if ((error == wxGIF_TRUNCATED) && verbose)
69 {
70 wxLogError(_("GIF: data stream seems to be truncated."));
71 /* go on; image data is OK */
72 }
73
74 if (ok)
75 {
76 ok = decod->ConvertToImage(index != -1 ? (size_t)index : 0, image);
77 }
78 else
79 {
80 wxLogError(_("GIF: Invalid gif index."));
81 }
82
83 delete decod;
84
85 return ok;
86 }
87
SaveFile(wxImage * WXUNUSED (image),wxOutputStream & WXUNUSED (stream),bool verbose)88 bool wxGIFHandler::SaveFile( wxImage * WXUNUSED(image),
89 wxOutputStream& WXUNUSED(stream), bool verbose )
90 {
91 if (verbose)
92 wxLogDebug(wxT("GIF: the handler is read-only!!"));
93
94 return false;
95 }
96
DoCanRead(wxInputStream & stream)97 bool wxGIFHandler::DoCanRead( wxInputStream& stream )
98 {
99 wxGIFDecoder decod;
100 return decod.CanRead(stream);
101 }
102
103 #endif // wxUSE_STREAMS
104
105 #endif // wxUSE_GIF
106