#ifndef __HGGIF_H__
#define __HGGIF_H__

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

HG_DECLARE_HANDLE(HGGifReader);
HG_DECLARE_HANDLE(HGGifWriter);

#pragma pack(push)
#pragma pack(4)

typedef struct
{
	HGUInt width; /* 图像宽 */
	HGUInt height; /* 图像高 */
	HGUInt colorResolution;	/* 位深 */
	HGUInt imageCount;	/* 图像数量 */
}HGGifLoadInfo;

typedef struct
{
	HGUInt width; /* 图像宽 */
	HGUInt height; /* 图像高 */
}HGGifSaveInfo;

#pragma pack(pop)

HGEXPORT HGResult HGAPI HGImgFmt_CheckGifFile(const HGChar* fileName, HGBool* isGif);

HGEXPORT HGResult HGAPI HGImgFmt_OpenGifReader(const HGChar* fileName, HGGifLoadInfo* info, HGGifReader* reader);

HGEXPORT HGResult HGAPI HGImgFmt_CloseGifReader(HGGifReader reader);

HGEXPORT HGResult HGAPI HGImgFmt_RetrieveImageFromGifReader(HGGifReader reader, HGUInt *index, HGUInt *interval,
	HGUInt imgType, HGUInt imgOrigin, HGImage* image);

HGEXPORT HGResult HGAPI HGImgFmt_LoadImageFromGifReader(HGGifReader reader, HGUInt index, HGUInt* interval,
	HGUInt imgType, HGUInt imgOrigin, HGImage* image);

HGEXPORT HGResult HGAPI HGImgFmt_LoadGifImage(const HGChar* fileName, HGGifLoadInfo* info, HGUInt* interval,
	HGUInt imgType, HGUInt imgOrigin, HGImage* image);

HGEXPORT HGResult HGAPI HGImgFmt_OpenGifWriter(const HGChar* fileName, const HGGifSaveInfo* info, HGGifWriter* writer);

HGEXPORT HGResult HGAPI HGImgFmt_CloseGifWriter(HGGifWriter writer);

HGEXPORT HGResult HGAPI HGImgFmt_SaveImageToGifWriter(HGGifWriter writer, HGUInt interval, HGColor bkColor, HGImage image);

HGEXPORT HGResult HGAPI HGImgFmt_SaveGifImage(HGImage image, const HGGifSaveInfo* info, 
	HGUInt interval, HGColor bkColor, const HGChar* fileName);

#endif /* __HGGIF_H__ */