Added IFF handler.

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

diff --git a/include/wx/iffdecod.h b/include/wx/iffdecod.h
new file mode 100644 (file)
index 0000000..7520167
--- /dev/null
+++ b/include/wx/iffdecod.h
@@ -0,0 +1,94 @@
+//
+// iffdecod.h  - image handler for IFF/ILBM images
+//
+// (c) Steffen Gutmann, 2002
+//
+// Creation date: 08.01.2002
+// Last modified: 12.01.2002
+//
+
+#ifndef WX_IIF_DECODE_H
+#define WX_IIF_DECODE_H
+
+#ifdef __GNUG__
+#pragma interface "iffdecod.h"
+#endif
+
+#include "wx/setup.h"
+#define wxUSE_IFF 1
+
+#if wxUSE_STREAMS && wxUSE_IFF
+
+#include "wx/stream.h"
+#include "wx/image.h"
+
+// --------------------------------------------------------------------------
+// Constants
+// --------------------------------------------------------------------------
+
+// Error codes:
+//  Note that the error code wxIFF_TRUNCATED means that the image itself
+//  is most probably OK, but the decoder didn't reach the end of the data
+//  stream; this means that if it was not reading directly from file,
+//  the stream will not be correctly positioned.
+//
+
+enum
+{
+    wxIFF_OK = 0,                   /* everything was OK */
+    wxIFF_INVFORMAT,                /* error in iff header */
+    wxIFF_MEMERR,                   /* error allocating memory */
+    wxIFF_TRUNCATED                 /* file appears to be truncated */
+};
+
+// --------------------------------------------------------------------------
+// wxIFFDecoder class
+// --------------------------------------------------------------------------
+
+// internal class for storing IFF image data
+class IFFImage
+{
+public:
+    unsigned int w;                 /* width */
+    unsigned int h;                 /* height */
+    int transparent;                /* transparent color (-1 = none) */
+    int colors;                            /* number of colors */
+    unsigned char *p;               /* bitmap */
+    unsigned char *pal;             /* palette */
+
+    IFFImage() : w(0), h(0), colors(0), p(0), pal(0) {}
+    ~IFFImage() { delete [] p; delete [] pal; }
+};
+
+class WXDLLEXPORT wxIFFDecoder
+{
+private:
+    IFFImage *m_image;         // image data
+    wxInputStream *m_f;        // input stream
+    unsigned char *databuf; 
+    unsigned char *picptr; 
+    unsigned char *decomp_mem;
+
+    void Destroy();
+
+public:
+    // get data of current frame
+    unsigned char* GetData() const;
+    unsigned char* GetPalette() const;
+    int GetNumColors() const;
+    unsigned int GetWidth() const;
+    unsigned int GetHeight() const;
+    int GetTransparentColour() const;
+
+    // constructor, destructor, etc.
+    wxIFFDecoder(wxInputStream *s);
+    ~wxIFFDecoder() { Destroy(); }
+    bool CanRead();
+    int ReadIFF();
+    bool ConvertToImage(wxImage *image) const;
+};
+
+
+#endif  // wxUSE_STREAM && wxUSE_IFF
+#endif  // _WX_IFFDECOD_H
+