94 lines
3 KiB
C++
94 lines
3 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/imaggif.h
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// Purpose: wxImage GIF handler
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// Author: Vaclav Slavik, Guillermo Rodriguez Garcia, Gershon Elber, Troels K
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// Copyright: (c) 1999-2011 Vaclav Slavik, Guillermo Rodriguez Garcia, Gershon Elber, Troels K
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_IMAGGIF_H_
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#define _WX_IMAGGIF_H_
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#include "wx/image.h"
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//-----------------------------------------------------------------------------
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// wxGIFHandler
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//-----------------------------------------------------------------------------
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#if wxUSE_GIF
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#define wxIMAGE_OPTION_GIF_COMMENT wxT("GifComment")
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struct wxRGB;
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struct GifHashTableType;
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class WXDLLIMPEXP_FWD_CORE wxImageArray; // anidecod.h
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class WXDLLIMPEXP_CORE wxGIFHandler : public wxImageHandler
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{
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public:
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inline wxGIFHandler()
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{
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m_name = wxT("GIF file");
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m_extension = wxT("gif");
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m_type = wxBITMAP_TYPE_GIF;
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m_mime = wxT("image/gif");
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m_hashTable = NULL;
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}
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#if wxUSE_STREAMS
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virtual bool LoadFile(wxImage *image, wxInputStream& stream,
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bool verbose = true, int index = -1);
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virtual bool SaveFile(wxImage *image, wxOutputStream& stream,
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bool verbose=true);
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// Save animated gif
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bool SaveAnimation(const wxImageArray& images, wxOutputStream *stream,
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bool verbose = true, int delayMilliSecs = 1000);
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protected:
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virtual int DoGetImageCount(wxInputStream& stream);
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virtual bool DoCanRead(wxInputStream& stream);
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bool DoSaveFile(const wxImage&, wxOutputStream *, bool verbose,
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bool first, int delayMilliSecs, bool loop,
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const wxRGB *pal, int palCount,
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int mask_index);
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#endif // wxUSE_STREAMS
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protected:
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// Declarations for saving
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unsigned long m_crntShiftDWord; /* For bytes decomposition into codes. */
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int m_pixelCount;
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struct GifHashTableType *m_hashTable;
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wxInt16
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m_EOFCode, /* The EOF LZ code. */
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m_clearCode, /* The CLEAR LZ code. */
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m_runningCode, /* The next code algorithm can generate. */
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m_runningBits, /* The number of bits required to represent RunningCode. */
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m_maxCode1, /* 1 bigger than max. possible code, in RunningBits bits. */
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m_crntCode, /* Current algorithm code. */
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m_crntShiftState; /* Number of bits in CrntShiftDWord. */
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wxUint8 m_LZBuf[256]; /* Compressed input is buffered here. */
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bool InitHashTable();
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void ClearHashTable();
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void InsertHashTable(unsigned long key, int code);
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int ExistsHashTable(unsigned long key);
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#if wxUSE_STREAMS
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bool CompressOutput(wxOutputStream *, int code);
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bool SetupCompress(wxOutputStream *, int bpp);
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bool CompressLine(wxOutputStream *, const wxUint8 *line, int lineLen);
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#endif
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private:
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DECLARE_DYNAMIC_CLASS(wxGIFHandler)
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};
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#endif // wxUSE_GIF
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#endif // _WX_IMAGGIF_H_
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