#ifndef _IMAGEDLL_H_
#define _IMAGEDLL_H_


//#include <stddef.h>
//#ifdef _WIN32
//#include <windows.h>
//#endif /* _WIN32 */


#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#ifdef _WIN32
#define EL_CDECL __cdecl
#define EL_STDCALL __stdcall
#define EL_EXPORT __declspec(dllexport)
#else
#define EL_CDECL
#define EL_STDCALL
#define EL_EXPORT
#endif


#ifndef ELAPI
#define ELAPI(rettype) EL_EXPORT rettype EL_CDECL
#endif

#ifdef __cplusplus
#define EL_DEFAULT(val) = val
#else
#define EL_DEFAULT(val)
#endif

typedef void *ELimage;
/* image file */
typedef void *ELfile;
#pragma pack(push, 1)

typedef struct ELsize
{
	int width;
	int height;
}ELsize;

typedef struct ELpoint
{
	int x;
	int y;
}ELpoint;

typedef struct ELrect
{
	int x;
	int y;
	int width;
	int height;
}ELrect;

typedef struct ELregion
{
	ELpoint pt[4];
}ELregion;

#pragma pack(push, 1)


//压缩率选项
enum elCompressMode{
	EL_VIDEO_CAP_COMPRESS_HIGH=0,
	EL_VIDEO_CAP_COMPRESS_HIGHER,
	EL_VIDEO_CAP_COMPRESS_MEDIUM,
	EL_VIDEO_CAP_COMPRESS_LOWER,
	EL_VIDEO_CAP_COMPRESS_LOW
};

typedef unsigned int ELcolor;

#define EL_INFO_LEVEL_FATAL		0x1
#define EL_INFO_LEVEL_ERROR		0x2
#define EL_INFO_LEVEL_WARNING	0x3
#define EL_INFO_LEVEL_INFO		0x4


/* image format */
#define EL_FORMAT_UNKNOWN		-1
#define EL_FORMAT_BMP			0
#define EL_FORMAT_ICO			1
#define EL_FORMAT_JPEG			2
#define EL_FORMAT_PNG			13
#define EL_FORMAT_TIFF			18
#define EL_FORMAT_GIF			25

/* image load and save flag */
#define EL_JPEG_QUALITYSUPERB	0x80	//! save with superb quality (100:1)
#define EL_JPEG_QUALITYGOOD		0x0100	//! save with good quality (75:1)
#define EL_JPEG_QUALITYNORMAL	0x0200	//! save with normal quality (50:1)
#define EL_JPEG_QUALITYAVERAGE	0x0400	//! save with average quality (25:1)
#define EL_JPEG_QUALITYBAD		0x0800	//! save with bad quality (10:1)
//1~100 decimal integer x, save with x:1 


/* image create flag */
#define EL_CREATE_TOP_LEFT		0x1
#define EL_CREATE_BOTTOM_LEFT	0x2

/* image channels */
#define EL_CHANNELS_GRAY		0x1
#define EL_CHANNELS_COLOR		0x3

/* image prop */
#define EL_PROP_WIDTH			0x1
#define EL_PROP_HEIGHT			0x2
#define EL_PROP_CHANNELS		0x3
#define EL_PROP_WIDTHSTEP		0x4
#define EL_PROP_XDPI			0x5
#define EL_PROP_YDPI			0x6

/* image cvt */
#define EL_CVT_COLOR2GRAY		0x6
#define	EL_CVT_GRAY2COLOR		0x8

/* image rotate */
#define EL_ROTATE_KEEP_SIZE		0x0
#define EL_ROTATE_KEEP_INFO		0x1

/* image flip */
#define EL_FLIP_HORIZONTAL		0
#define EL_FLIP_VERTICAL		1
#define EL_FLIP_BOTH			-1

#define EL_DESKEW_CLEAN			0
#define EL_DESKEW_MORE			1

/* image rectify */
#define EL_RECTIFY_NONE			0
#define EL_RECTIFY_IDCARD		1

/* color */
#define EL_RGB(r, g, b) ((ELcolor)(((unsigned char)(r) \
	| ((unsigned short)((unsigned char)(g)) << 8)) \
	| (((unsigned int)(unsigned char)(b)) << 16)))


ELAPI(int)
elWriteInfo(
	int level,
	const char *format,
	...
	);

ELAPI(int)
	elSetLogNameFormat(
	const char * prefix,
	int flag EL_DEFAULT(0)
	);


//加载本地图片
ELAPI(ELimage)
elLoadImage(
	const char *fileName,
	int flag EL_DEFAULT(0)
	);

//保存本地图片
ELAPI(int)
elSaveImage(
	ELimage image,
	const char *fileName,
	int flag EL_DEFAULT(0)
	);
ELAPI(int)
elAppendImage(
	ELfile file,
	ELimage image
	);

ELAPI(ELfile)
elCreateFile(
	const char *fileName,
	int flag EL_DEFAULT(0)
	);

ELAPI(int)
elLoadList(
	const char *fileName,
	ELimage *list,
	int *len,
	int flag EL_DEFAULT(0)
	);

ELAPI(int)
	elSaveList(
	const char *fileName,
	ELimage *list,
	int len,
	int flag
	);
ELAPI(int)
elReleaseImage(
	ELimage image
	);

ELAPI(int)
elReleaseFile(
	ELfile file
	);

ELAPI(HBITMAP)
elCreateDIB(
	ELimage image
	);

ELAPI(int)
elGetImageCount(
	ELfile file
	);

ELAPI(ELimage)
elGetImage(
	ELfile file,
	int idx
	);

ELAPI(ELfile)
elOpenFile(
	const char *fileName,
	int flag EL_DEFAULT(0)
	);

ELAPI(int)
elAdaptiveThresholdImage(
	ELimage image,
	int flag EL_DEFAULT(0),
	ELimage *dest EL_DEFAULT(NULL)
	);

//去底色

ELAPI(int)
elDelImageBkColor(
	ELimage image,
	ELimage *dest EL_DEFAULT(NULL)
	);

//文字印章白底
ELAPI(int)
elDelImageBackgrand(
	ELimage image,
	ELimage *dest EL_DEFAULT(NULL)
	);


//实现单双页展平  参数 bRemoveFinger 是否去除手指；flag  是否去除书籍边缘； bDouble   ture表示切分成双页展平，false表示单页展平
ELAPI(int)elZhanPinImage(BOOL bRemoveFinger, ELimage srcImg, 
	 ELimage *outImgLeft, ELimage *outImgRight, int flag,bool bDouble = true 
	);

#ifdef __cplusplus
}
#endif

#endif