fix comparison of BYTE variable with -1 after last commit

[wxWidgets.git] / include / wx / imagpng.h

diff --git a/include/wx/imagpng.h b/include/wx/imagpng.h
index 1bd7247687df66a421eb89c09ccd6b9ccb6a2c3a..8edf80b879cb132f8150681f0d57d4d5d9605b19 100644 (file)
--- a/include/wx/imagpng.h
+++ b/include/wx/imagpng.h
@@ -10,17 +10,26 @@
 #ifndef _WX_IMAGPNG_H_
 #define _WX_IMAGPNG_H_
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma interface "imagpng.h"
-#endif
-
-#include "wx/image.h"
+#include "wx/defs.h"
 
 //-----------------------------------------------------------------------------
 // wxPNGHandler
 //-----------------------------------------------------------------------------
 
 #if wxUSE_LIBPNG
+
+#include "wx/image.h"
+
+#define wxIMAGE_OPTION_PNG_FORMAT    wxT("PngFormat")
+#define wxIMAGE_OPTION_PNG_BITDEPTH  wxT("PngBitDepth")
+
+enum
+{
+    wxPNG_TYPE_COLOUR = 0,
+    wxPNG_TYPE_GREY = 2,
+    wxPNG_TYPE_GREY_RED = 3
+};
+
 class WXDLLEXPORT wxPNGHandler: public wxImageHandler
 {
 public:
@@ -35,14 +44,16 @@ public:
 #if wxUSE_STREAMS
     virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=true, int index=-1 );
     virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=true );
+protected:
     virtual bool DoCanRead( wxInputStream& stream );
 #endif
 
 private:
     DECLARE_DYNAMIC_CLASS(wxPNGHandler)
 };
-#endif
 
+#endif
+  // wxUSE_LIBPNG
 
 #endif
   // _WX_IMAGPNG_H_