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vvs31415andVadim Zeitlin
de3d441a7b
Provide a ctor which can be used to fully initialize the base class instead of forcing all image handlers to initialize their member variables manually and use it in all the standard image handlers. Closes #25933. Co-authored-by: Vadim Zeitlin <vadim@wxwidgets.org>
98 lines
3.1 KiB
C++
98 lines
3.1 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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#include <vector>
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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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#define wxIMAGE_OPTION_GIF_TRANSPARENCY wxS("Transparency")
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#define wxIMAGE_OPTION_GIF_TRANSPARENCY_HIGHLIGHT wxS("Highlight")
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#define wxIMAGE_OPTION_GIF_TRANSPARENCY_UNCHANGED wxS("Unchanged")
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struct wxRGB;
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struct GifHashTableType;
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class WXDLLIMPEXP_CORE wxGIFHandler : public wxImageHandler
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{
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public:
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wxGIFHandler() : wxImageHandler(
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wxT("GIF file"),
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wxT("gif"),
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wxBITMAP_TYPE_GIF,
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wxT("image/gif"))
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{
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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) override;
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virtual bool SaveFile(wxImage *image, wxOutputStream& stream,
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bool verbose=true) override;
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// Save animated gif
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bool SaveAnimation(const std::vector<wxImage>& 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) override;
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virtual bool DoCanRead(wxInputStream& stream) override;
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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 = nullptr;
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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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wxDECLARE_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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