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Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: wx/imaggif.h
	3	// Purpose: wxImage GIF handler
	4	// Author: Vaclav Slavik, Guillermo Rodriguez Garcia, Gershon Elber, Troels K
	5	// RCS-ID: $Id$
	6	// Copyright: (c) 1999-2011 Vaclav Slavik, Guillermo Rodriguez Garcia, Gershon Elber, Troels K
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	#ifndef _WX_IMAGGIF_H_
	11	#define _WX_IMAGGIF_H_
	12
	13	#include "wx/image.h"
	14
	15
	16	//-----------------------------------------------------------------------------
	17	// wxGIFHandler
	18	//-----------------------------------------------------------------------------
	19
	20	#if wxUSE_GIF
	21
	22	#define wxIMAGE_OPTION_GIF_COMMENT wxT("GifComment")
	23
	24	struct wxRGB;
	25	struct GifHashTableType;
	26	class WXDLLIMPEXP_FWD_CORE wxImageArray; // anidecod.h
	27
	28	class WXDLLIMPEXP_CORE wxGIFHandler : public wxImageHandler
	29	{
	30	public:
	31	inline wxGIFHandler()
	32	{
	33	m_name = wxT("GIF file");
	34	m_extension = wxT("gif");
	35	m_type = wxBITMAP_TYPE_GIF;
	36	m_mime = wxT("image/gif");
	37	m_hashTable = NULL;
	38	}
	39
	40	#if wxUSE_STREAMS
	41	virtual bool LoadFile(wxImage *image, wxInputStream& stream,
	42	bool verbose = true, int index = -1);
	43	virtual bool SaveFile(wxImage *image, wxOutputStream& stream,
	44	bool verbose=true);
	45
	46	// Save animated gif
	47	bool SaveAnimation(const wxImageArray& images, wxOutputStream *stream,
	48	bool verbose = true, int delayMilliSecs = 1000);
	49
	50	protected:
	51	virtual int DoGetImageCount(wxInputStream& stream);
	52	virtual bool DoCanRead(wxInputStream& stream);
	53
	54	bool DoSaveFile(const wxImage&, wxOutputStream *, bool verbose,
	55	bool first, int delayMilliSecs, bool loop,
	56	const wxRGB *pal, int palCount,
	57	int mask_index);
	58	#endif // wxUSE_STREAMS
	59	protected:
	60
	61	// Declarations for saving
	62
	63	unsigned long m_crntShiftDWord; /* For bytes decomposition into codes. */
	64	int m_pixelCount;
	65	struct GifHashTableType *m_hashTable;
	66	wxInt16
	67	m_EOFCode, /* The EOF LZ code. */
	68	m_clearCode, /* The CLEAR LZ code. */
	69	m_runningCode, /* The next code algorithm can generate. */
	70	m_runningBits, /* The number of bits required to represent RunningCode. */
	71	m_maxCode1, /* 1 bigger than max. possible code, in RunningBits bits. */
	72	m_crntCode, /* Current algorithm code. */
	73	m_crntShiftState; /* Number of bits in CrntShiftDWord. */
	74	wxUint8 m_LZBuf[256]; /* Compressed input is buffered here. */
	75
	76	bool InitHashTable();
	77	void ClearHashTable();
	78	void InsertHashTable(unsigned long key, int code);
	79	int ExistsHashTable(unsigned long key);
	80
	81	#if wxUSE_STREAMS
	82	bool CompressOutput(wxOutputStream *, int code);
	83	bool SetupCompress(wxOutputStream *, int bpp);
	84	bool CompressLine(wxOutputStream , const wxUint8 line, int lineLen);
	85	#endif
	86
	87	private:
	88	DECLARE_DYNAMIC_CLASS(wxGIFHandler)
	89	};
	90
	91	#endif // wxUSE_GIF
	92
	93	#endif // _WX_IMAGGIF_H_
	94