include/wx/anidecod.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/anidecod.h
   3 // Purpose:     wxANIDecoder, ANI reader for wxImage and wxAnimation
   4 // Author:      Francesco Montorsi
   5 // CVS-ID:      $Id$
   6 // Copyright:   (c) 2006 Francesco Montorsi
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_ANIDECOD_H
  11 #define _WX_ANIDECOD_H
  12
  13 #include "wx/defs.h"
  14
  15 #if wxUSE_STREAMS && wxUSE_GIF
  16
  17 #include "wx/stream.h"
  18 #include "wx/image.h"
  19 #include "wx/animdecod.h"
  20
  21
  22 class /*WXDLLEXPORT*/ wxANIFrameInfo;
  23
  24 WX_DECLARE_OBJARRAY(wxANIFrameInfo, wxANIFrameInfoArray);
  25 WX_DECLARE_OBJARRAY(wxImage, wxImageArray);
  26
  27 // --------------------------------------------------------------------------
  28 // wxANIDecoder class
  29 // --------------------------------------------------------------------------
  30
  31 class WXDLLEXPORT wxANIDecoder : public wxAnimationDecoder
  32 {
  33 private:
  34
  35     // frames stored as wxImage(s): ANI files are meant to be used mostly for animated
  36     // cursors and thus they do not use any optimization to encode differences between
  37     // two frames: they are just a list of images to display sequentially.
  38     wxImageArray m_images;
  39
  40     // the info about each image stored in m_images.
  41     // NB: m_info.GetCount() may differ from m_images.GetCount()!
  42     wxANIFrameInfoArray m_info;
  43
  44     // this is the wxCURHandler used to load the ICON chunk of the ANI files
  45     static wxCURHandler sm_handler;
  46
  47 public:
  48     virtual wxSize GetFrameSize(size_t frame) const;
  49     virtual wxPoint GetFramePosition(size_t frame) const;
  50     virtual wxAnimationDisposal GetDisposalMethod(size_t frame) const;
  51     virtual long GetDelay(size_t frame) const;
  52
  53 public:
  54     // constructor, destructor, etc.
  55     wxANIDecoder();
  56     ~wxANIDecoder();
  57
  58 public:     // implementation of wxAnimationDecoder's pure virtuals
  59
  60     virtual bool CanRead( wxInputStream& stream ) const;
  61     virtual bool Load( wxInputStream& stream );
  62
  63     bool ConvertToImage(size_t frame, wxImage *image) const;
  64
  65     wxAnimationDecoder *Clone() const
  66         { return new wxANIDecoder; }
  67     wxAnimationType GetType() const
  68         { return wxANIMATION_TYPE_ANI; }
  69
  70 private:
  71     DECLARE_NO_COPY_CLASS(wxANIDecoder)
  72 };
  73
  74
  75 #endif  // wxUSE_STREAM && wxUSE_GIF
  76 #endif  // _WX_ANIDECOD_H
  77