Added IFF handler.

Minor doc updates.
  Corrected configure for SGI OpenGL (wx-config related).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13585 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/imagiff.cpp

@@ -0,0 +1,108 @@
+//
+// imgiff.cc    - image handler for Amiga IFF images
+//        parts of the source taken by xv source code.
+//
+// (c) Steffen Gutmann, 2002
+//
+// Creation date: 08.01.2002
+// Last modified: 08.01.2002
+//
+
+#ifdef __GNUG__
+#pragma implementation "imagiff.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
+
+#include "wx/imagiff.h"
+#include "wx/iffdecod.h"
+#include "wx/wfstream.h"
+#include "wx/log.h"
+#include "wx/intl.h"
+
+#if wxUSE_IMAGE && wxUSE_IFF
+
+IMPLEMENT_DYNAMIC_CLASS(wxIFFHandler, wxImageHandler)
+
+//-----------------------------------------------------------------------------
+// wxIFFHandler
+//-----------------------------------------------------------------------------
+
+#if wxUSE_STREAMS
+
+bool wxIFFHandler::LoadFile(wxImage *image, wxInputStream& stream, 
+    bool verbose, int WXUNUSED(index))
+{
+    wxIFFDecoder *decod;
+    int error;
+    bool ok;
+
+    decod = new wxIFFDecoder(&stream);
+    error = decod->ReadIFF();
+
+    if ((error != wxIFF_OK) && (error != wxIFF_TRUNCATED))
+    {
+        if (verbose)
+        {
+            switch (error)
+            {
+                case wxIFF_INVFORMAT:
+                    wxLogError(_("IFF: error in IFF image format."));
+                    break;
+                case wxIFF_MEMERR:
+                    wxLogError(_("IFF: not enough memory."));
+                    break;
+                default:
+                    wxLogError(_("IFF: unknown error!!!"));
+                    break;
+            }
+        }
+        delete decod;
+        return FALSE;
+    }
+
+    if ((error == wxIFF_TRUNCATED) && verbose)
+    {
+        wxLogError(_("IFF: data stream seems to be truncated."));
+        /* go on; image data is OK */
+    }
+
+    ok = decod->ConvertToImage(image);
+    delete decod;
+
+    return ok;
+}
+
+bool wxIFFHandler::SaveFile(wxImage * WXUNUSED(image),
+    wxOutputStream& WXUNUSED(stream), bool verbose)
+{
+    if (verbose)
+        wxLogDebug(wxT("IFF: the handler is read-only!!"));
+
+    return FALSE;
+}
+
+bool wxIFFHandler::DoCanRead(wxInputStream& stream)
+{
+    wxIFFDecoder *decod;
+    bool ok;
+
+    decod = new wxIFFDecoder(&stream);
+    ok = decod->CanRead();
+    delete decod;
+
+    return ok;
+}
+
+#endif  
+#endif  
+