ximage.h

电驴的源代码

/*
 * File:	ximage.h
 * Purpose:	General Purpose Image Class 
 */
/* === C R E D I T S  &  D I S C L A I M E R S ==============
 * Permission is given by the author to freely redistribute and include
 * this code in any program as long as this credit is given where due.
 *
 * CxImage (c)  07/Aug/2001 <[e-mail]>
 * CxImage version 5.71 25/Apr/2003
 * See the file history.htm for the complete bugfix and news report.
 *
 * original CImage and CImageIterator implementation are:
 * Copyright: (c) 1995, Alejandro Aguilar Sierra <asierra(at)servidor(dot)unam(dot)mx>
 *
 * COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
 * THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
 * CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
 * THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
 * SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
 * PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.
 *
 * Use at your own risk!
 * ==========================================================
 */
#if !defined(__CXIMAGE_H)
#define __CXIMAGE_H

#if _MSC_VER > 1000
#pragma once
#endif 

/////////////////////////////////////////////////////////////////////////////
// CxImage supported features
#define CXIMAGE_SUPPORT_ALPHA          0
#define CXIMAGE_SUPPORT_SELECTION      0
#define CXIMAGE_SUPPORT_TRANSFORMATION 1
#define CXIMAGE_SUPPORT_DSP            0
#define CXIMAGE_SUPPORT_LAYERS		   0

#define CXIMAGE_SUPPORT_DECODE	1
#define CXIMAGE_SUPPORT_ENCODE	1		//<vho><T.Peck>
#define	CXIMAGE_SUPPORT_WINDOWS 1
#define	CXIMAGE_SUPPORT_WINCE   0		//<T.Peck>

/////////////////////////////////////////////////////////////////////////////
// CxImage supported formats
#define CXIMAGE_SUPPORT_BMP 1
#define CXIMAGE_SUPPORT_GIF 0
#define CXIMAGE_SUPPORT_JPG 0
#define CXIMAGE_SUPPORT_PNG 1
#define CXIMAGE_SUPPORT_MNG 0
#define CXIMAGE_SUPPORT_ICO 0
#define CXIMAGE_SUPPORT_TIF 0
#define CXIMAGE_SUPPORT_TGA 0
#define CXIMAGE_SUPPORT_PCX 0
#define CXIMAGE_SUPPORT_WBMP 0
#define CXIMAGE_SUPPORT_WMF 0
#define CXIMAGE_SUPPORT_J2K 0		// Beta, use JP2
#define CXIMAGE_SUPPORT_JBG 0		// GPL'd see ../jbig/copying.txt & ../jbig/patents.htm

#define CXIMAGE_SUPPORT_JP2 0
#define CXIMAGE_SUPPORT_JPC 0
#define CXIMAGE_SUPPORT_PGX 0
#define CXIMAGE_SUPPORT_PNM 0
#define CXIMAGE_SUPPORT_RAS 0

/////////////////////////////////////////////////////////////////////////////
#include "xfile.h"
#include "xiofile.h"
#include "xmemfile.h"

#include "ximadefs.h"	//<vho> adjust some #define

/////////////////////////////////////////////////////////////////////////////
// CxImage formats enumerator
enum ENUM_CXIMAGE_FORMATS{
CXIMAGE_FORMAT_UNKNOWN,
#if CXIMAGE_SUPPORT_BMP
CXIMAGE_FORMAT_BMP,
#endif
#if CXIMAGE_SUPPORT_GIF
CXIMAGE_FORMAT_GIF,
#endif
#if CXIMAGE_SUPPORT_JPG
CXIMAGE_FORMAT_JPG,
#endif
#if CXIMAGE_SUPPORT_PNG
CXIMAGE_FORMAT_PNG,
#endif
#if CXIMAGE_SUPPORT_MNG
CXIMAGE_FORMAT_MNG,
#endif
#if CXIMAGE_SUPPORT_ICO
CXIMAGE_FORMAT_ICO,
#endif
#if CXIMAGE_SUPPORT_TIF
CXIMAGE_FORMAT_TIF,
#endif
#if CXIMAGE_SUPPORT_TGA
CXIMAGE_FORMAT_TGA,
#endif
#if CXIMAGE_SUPPORT_PCX
CXIMAGE_FORMAT_PCX,
#endif
#if CXIMAGE_SUPPORT_WBMP
CXIMAGE_FORMAT_WBMP,
#endif
#if CXIMAGE_SUPPORT_WMF
CXIMAGE_FORMAT_WMF,
#endif
#if CXIMAGE_SUPPORT_J2K
CXIMAGE_FORMAT_J2K,
#endif
#if CXIMAGE_SUPPORT_JBG
CXIMAGE_FORMAT_JBG,
#endif
#if CXIMAGE_SUPPORT_JP2
CXIMAGE_FORMAT_JP2,
#endif
#if CXIMAGE_SUPPORT_JPC
CXIMAGE_FORMAT_JPC,
#endif
#if CXIMAGE_SUPPORT_PGX
CXIMAGE_FORMAT_PGX,
#endif
#if CXIMAGE_SUPPORT_PNM
CXIMAGE_FORMAT_PNM,
#endif
#if CXIMAGE_SUPPORT_RAS
CXIMAGE_FORMAT_RAS,
#endif
CMAX_IMAGE_FORMATS
};

//color to grey mapping <H. Muelner> <jurgene>
//#define RGB2GRAY(r,g,b) (((b)*114 + (g)*587 + (r)*299)/1000)
#define RGB2GRAY(r,g,b) (((b)*117 + (g)*601 + (r)*306) >> 10)

struct rgb_color { BYTE r,g,b; };

/////////////////////////////////////////////////////////////////////////////
// CxImage class
/////////////////////////////////////////////////////////////////////////////
class DLL_EXP CxImage
{
//extensible information collector
typedef struct tagCxImageInfo {
	DWORD	dwEffWidth;			//DWORD aligned scan line width
	BYTE*	pImage;				//THE IMAGE BITS
	CxImage* pGhost;			//if this is a ghost, pGhost points to the body
	CxImage* pParent;			//if this is a layer, pParent points to the body
	DWORD	dwType;				//original image format
	char	szLastError[256];	//debugging
	long	nProgress;			//monitor
	long	nEscape;			//escape
	long	nBkgndIndex;		//used for GIF, PNG, MNG
	RGBQUAD nBkgndColor;		//used for RGB transparency
	BYTE	nQuality;			//used for JPEG
	long	nFrame;				//used for TIF, GIF, MNG : actual frame
	long	nNumFrames;			//used for TIF, GIF, MNG : total number of frames
	DWORD	dwFrameDelay;		//used for GIF, MNG
	long	xDPI;				//horizontal resolution
	long	yDPI;				//vertical resolution
	RECT	rSelectionBox;		//bounding rectangle
	BYTE	nAlphaMax;			//max opacity (fade)
	bool	bAlphaPaletteEnabled; //true if alpha values in the palette are enabled.
	bool	bEnabled;			//enables the painting functions
	long	xOffset;
	long	yOffset;
	DWORD	dwEncodeOption;		//for GIF, TIF : 0=def.1=unc,2=fax3,3=fax4,4=pack,5=jpg
	RGBQUAD last_c;				//for GetNearestIndex optimization
	BYTE	last_c_index;
	bool	last_c_isvalid;
	long	nNumLayers;
	DWORD	dwFlags;			// 0x??00000 = reserved, 0x00??0000 = blend mode, 0x0000???? = layer id - user flags

} CXIMAGEINFO;

public:
	//constructors
	CxImage(DWORD imagetype = 0);
	CxImage(DWORD dwWidth, DWORD dwHeight, DWORD wBpp, DWORD imagetype = 0);
	CxImage(const CxImage &src, bool copypixels = true, bool copyselection = true, bool copyalpha = true);
	CxImage(const char * filename, DWORD imagetype);
	CxImage(FILE * stream, DWORD imagetype);
	CxImage(CxFile * stream, DWORD imagetype);
	CxImage(BYTE * buffer, DWORD size, DWORD imagetype);
	virtual ~CxImage();
	CxImage& operator = (const CxImage&);

	//initializzation
	void*	Create(DWORD dwWidth, DWORD dwHeight, DWORD wBpp, DWORD imagetype = 0);
	void	Destroy();
	void	Clear(BYTE bval=0);
	void	Copy(const CxImage &src, bool copypixels = true, bool copyselection = true, bool copyalpha = true);
	void	Transfer(CxImage &from);
	bool	CreateFromARGB(DWORD dwWidth,DWORD dwHeight,BYTE* argbArray);

	//Attributes
	long	GetSize();
	BYTE*	GetBits();
	BYTE	GetColorType();
	void*	GetDIB()		const {return pDib;}
	DWORD	GetHeight()		const {return head.biHeight;}
	DWORD	GetWidth()		const {return head.biWidth;}
	DWORD	GetEffWidth()	const {return info.dwEffWidth;}
	DWORD	GetNumColors()	const {return head.biClrUsed;}
	WORD	GetBpp()		const {return head.biBitCount;}
	DWORD	GetType()		const {return info.dwType;}
	char*	GetLastError()	{return info.szLastError;}
	const char* GetVersion();

	DWORD	GetFrameDelay() const {return info.dwFrameDelay;}
	void	SetFrameDelay(DWORD d) {info.dwFrameDelay=d;}

	void	GetOffset(long *x,long *y) {*x=info.xOffset; *y=info.yOffset;}
	void	SetOffset(long x,long y) {info.xOffset=x; info.yOffset=y;}

	BYTE	GetJpegQuality() const {return info.nQuality;}
	void	SetJpegQuality(BYTE q) {info.nQuality = q;}

	long	GetXDPI()		const {return info.xDPI;}
	long	GetYDPI()		const {return info.yDPI;}
	void	SetXDPI(long dpi);
	void	SetYDPI(long dpi);

	long	GetProgress()	const {return info.nProgress;}
	long	GetEscape()     const {return info.nEscape;}
	void	SetProgress(long p) {info.nProgress = p;}
	void	SetEscape(long i)   {info.nEscape = i;}

	long	GetTransIndex()	const {return info.nBkgndIndex;}
	RGBQUAD	GetTransColor();
	void	SetTransIndex(long idx) {info.nBkgndIndex = idx;}
	void	SetTransColor(RGBQUAD rgb) {info.nBkgndColor = rgb;}
	bool	IsTransparent() const {return info.nBkgndIndex>=0;} // <vho>