code_app/imgfmt/HGImgFmt.h

#ifndef __HGIMGFMT_H__
#define __HGIMGFMT_H__

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

HG_DECLARE_HANDLE(HGImgFmtReader);
HG_DECLARE_HANDLE(HGImgFmtWriter);

/* JPEG */
#define HGIMGFMT_TYPE_JPEG	1L
/* BMP */
#define HGIMGFMT_TYPE_BMP	2L
/* PNG */
#define HGIMGFMT_TYPE_PNG	3L
/* TIFF */
#define HGIMGFMT_TYPE_TIFF	4L
/* PDF */
#define HGIMGFMT_TYPE_PDF	5L
/* OFD */
#define HGIMGFMT_TYPE_OFD	6L

typedef struct
{
	HGUInt width; /* 图像宽 */
	HGUInt height; /* 图像高 */
	HGUInt bpp; /* 每像素比特数 */
	HGUInt xDpi; /* x-DPI */
	HGUInt yDpi; /* y-DPI */
}HGImgFmtLoadInfo;

typedef struct
{
	HGUInt xDpi; /* x-DPI */
	HGUInt yDpi; /* y-DPI */
}HGImgFmtSaveInfo;

HGEXPORT HGResult HGAPI HGImgFmt_GetImgFmtType(const HGChar* fileName, HGUInt* fmtType);

HGEXPORT HGResult HGAPI HGImgFmt_GetImgFmtTypeFromFileName(const HGChar* fileName, HGUInt* fmtType);

HGEXPORT HGResult HGAPI HGImgFmt_IsMultiImgFmtType(HGUInt fmtType, HGBool *isMulti);

HGEXPORT HGResult HGAPI HGImgFmt_LoadImage(const HGChar *fileName, HGUInt fmtType, HGImgFmtLoadInfo *info, 
	HGUInt imgType, HGUInt imgOrigin, HGImage *image);

HGEXPORT HGResult HGAPI HGImgFmt_SaveImage(HGImage image, HGUInt fmtType, const HGImgFmtSaveInfo *info, const HGChar *fileName);

HGEXPORT HGResult HGAPI HGImgFmt_OpenImageReader(const HGChar *fileName, HGUInt fmtType, HGImgFmtReader *reader);

HGEXPORT HGResult HGAPI HGImgFmt_CloseImageReader(HGImgFmtReader reader);

HGEXPORT HGResult HGAPI HGImgFmt_GetImagePageCount(HGImgFmtReader reader, HGUInt *count);

HGEXPORT HGResult HGAPI HGImgFmt_LoadImageFromReader(HGImgFmtReader reader, HGUInt index, HGImgFmtLoadInfo *info,
	HGUInt imgType, HGUInt imgOrigin, HGImage *image);

HGEXPORT HGResult HGAPI HGImgFmt_OpenImageWriter(const HGChar *fileName, HGUInt fmtType, HGImgFmtWriter *writer);

HGEXPORT HGResult HGAPI HGImgFmt_CloseImageWriter(HGImgFmtWriter writer);

HGEXPORT HGResult HGAPI HGImgFmt_SaveImageToWriter(HGImgFmtWriter writer, HGImage image, const HGImgFmtSaveInfo *info);

#endif /* __HGIMGFMT_H__ */