#ifndef __HGPNG_H__
#define __HGPNG_H__

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

typedef struct
{
	HGUInt width;
	HGUInt height;
	HGByte bitDepth;
	HGByte colorType;
	HGByte channels;
	HGByte filterType;
	HGByte InterlaceType;
	HGByte compressionType;
	HGByte pixelDepth;

	HGByte physUnitType;
	HGUInt xPixelsPerUnit;
	HGUInt yPixelsPerUnit;
}HGPngLoadInfo;

typedef struct
{
	HGByte physUnitType;
	HGUInt xPixelsPerUnit;
	HGUInt yPixelsPerUnit;
}HGPngSaveInfo;

HGEXPORT HGResult HGAPI HGImgFmt_CheckPngFile(const HGChar* fileName, HGBool* isPng);

HGEXPORT HGResult HGAPI HGImgFmt_LoadPngImage(const HGChar* fileName, HGPngLoadInfo* info,
	HGUInt imgType, HGUInt imgOrigin, HGImage* image);

HGEXPORT HGResult HGAPI HGImgFmt_SavePngImage(HGImage image, const HGPngSaveInfo* info, const HGChar* fileName);

#endif /* __HGPNG_H__ */