#ifndef __HGTIFF_H__
#define __HGTIFF_H__

#include "../base/HGDef.h"
#include "../base/HGBaseErr.h"
#include "HGImgFmtErr.h"
#include "../base/HGImage.h"

HG_DECLARE_HANDLE(HGTiffReader);
HG_DECLARE_HANDLE(HGTiffWriter);

/* 压缩方式 */
#define HGIMGFMT_TIFFCOMP_NONE		1L
#define HGIMGFMT_TIFFCOMP_LZW		5L
#define HGIMGFMT_TIFFCOMP_JPEG		7L

/* 分辨率单位 */
#define HGIMGFMT_TIFFRESUNIT_NONE	1L
#define HGIMGFMT_TIFFRESUNIT_INCH	2L		/* 英寸 */
#define HGIMGFMT_TIFFRESUNIT_CENTIMETER	3L	/* 厘米 */

typedef struct
{
	HGUInt width; /* 图像宽 */
	HGUInt height; /* 图像高 */
	HGUShort bitsPerSample; /* 每个采样的比特数 */
	HGUShort samplesPerPixel; /* 每个像素的采样数 */
	HGUShort compression; /* 压缩方式, 见HGIMGFMT_TIFFCOMP_* */
	HGUShort resolutionUnit; /* 分辨率单位, 见HGIMGFMT_TIFFRESUNIT_* */
	HGFloat xResolution; /* 分辨率x值 */
	HGFloat yResolution; /* 分辨率y值 */
}UPTiffLoadInfo;

typedef struct
{
	HGUInt compression; /* 压缩方式, 见HGIMGFMT_TIFFCOMP_* */
	HGUInt jpegQuality; /* jpeg压缩质量, 0-100 */
	HGUShort resolutionUnit; /* 分辨率单位, 见HGIMGFMT_TIFFRESUNIT_* */
	HGFloat xResolution; /* 分辨率x值 */
	HGFloat yResolution; /* 分辨率y值 */
}UPTiffSaveInfo;

HGEXPORT HGResult HGAPI HGImgFmt_CheckTiffFile(const HGChar* fileName, HGBool* isTiff);

HGEXPORT HGResult HGAPI HGImgFmt_OpenTiffReader(const HGChar* fileName, HGTiffReader* reader);

HGEXPORT HGResult HGAPI HGImgFmt_CloseTiffReader(HGTiffReader reader);

HGEXPORT HGResult HGAPI HGImgFmt_GetTiffPageCount(HGTiffReader reader, HGUInt* count);

HGEXPORT HGResult HGAPI HGImgFmt_LoadImageFromTiffReader(HGTiffReader reader, HGUInt index, UPTiffLoadInfo* info,
	HGUInt imgType, HGUInt imgOrigin, HGImage* image);

HGEXPORT HGResult HGAPI HGImgFmt_OpenTiffWriter(const HGChar* fileName, HGTiffWriter* writer);

HGEXPORT HGResult HGAPI HGImgFmt_CloseTiffWriter(HGTiffWriter writer);

HGEXPORT HGResult HGAPI HGImgFmt_SaveImageToTiffWriter(HGTiffWriter writer, HGImage image, const UPTiffSaveInfo* info);

#endif /* __HGTIFF_H__ */