git.saurik.com Git - wxWidgets.git/blame_incremental

... / ...

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