#include "HGImgFmt.h"
#include "HGJpeg.h"
#include "HGBmp.h"
#include "HGPng.h"
#include "HGTiff.h"
#include "HGPdf.h"
#include "HGOfd.h"
#include "../base/HGInc.h"
#include <string>

struct HGImgFmtReaderImpl
{
	HGImgFmtReaderImpl()
	{
		fmtType = 0;
		handle = NULL;
	}

	std::string fileName;
	HGUInt fmtType;
	HGPointer handle;
};

struct HGImgFmtWriterImpl
{
	HGImgFmtWriterImpl()
	{
		fmtType = 0;
		handle = NULL;
		write = HGFALSE;
	}

	std::string fileName;
	HGUInt fmtType;
	HGPointer handle;
	HGBool write; // 用于标记JPEG、BMP和PNG是否已经写入
};

HGResult HGAPI HGImgFmt_GetImgFmtType(const HGChar* fileName, HGUInt* fmtType)
{
	if (NULL == fileName || NULL == fmtType)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	HGBool isJpeg = HGFALSE;
	HGImgFmt_CheckJpegFile(fileName, &isJpeg);
	if (isJpeg)
	{
		*fmtType = HGIMGFMT_TYPE_JPEG;
		return HGBASE_ERR_OK;
	}

	HGBool isBmp = HGFALSE;
	HGImgFmt_CheckBmpFile(fileName, &isBmp);
	if (isBmp)
	{
		*fmtType = HGIMGFMT_TYPE_BMP;
		return HGBASE_ERR_OK;
	}

	HGBool isPng = HGFALSE;
	HGImgFmt_CheckPngFile(fileName, &isPng);
	if (isPng)
	{
		*fmtType = HGIMGFMT_TYPE_PNG;
		return HGBASE_ERR_OK;
	}

	HGBool isTiff = HGFALSE;
	HGImgFmt_CheckTiffFile(fileName, &isTiff);
	if (isTiff)
	{
		*fmtType = HGIMGFMT_TYPE_TIFF;
		return HGBASE_ERR_OK;
	}

	HGBool isPdf = HGFALSE;
	HGImgFmt_CheckPdfFile(fileName, &isPdf);
	if (isPdf)
	{
		*fmtType = HGIMGFMT_TYPE_PDF;
		return HGBASE_ERR_OK;
	}

	HGBool isOfd = HGFALSE;
	HGImgFmt_CheckOfdFile(fileName, &isOfd);
	if (isOfd)
	{
		*fmtType = HGIMGFMT_TYPE_OFD;
		return HGBASE_ERR_OK;
	}

	return HGBASE_ERR_FAIL;
}

HGResult HGAPI HGImgFmt_GetImgFmtTypeFromFileName(const HGChar* fileName, HGUInt* fmtType)
{
	if (NULL == fileName || NULL == fmtType)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	const char* p = strrchr(fileName, '.');
	if (NULL == p)
	{
		return HGBASE_ERR_FAIL;
	}

#if defined(HG_CMP_MSC)
	if (0 == _stricmp(p, ".jpe") || 0 == _stricmp(p, ".jpg") || 0 == _stricmp(p, ".jpeg"))
	{
		*fmtType = HGIMGFMT_TYPE_JPEG;
		return HGBASE_ERR_OK;
	}

	if (0 == _stricmp(p, ".bmp") || 0 == _stricmp(p, ".dib"))
	{
		*fmtType = HGIMGFMT_TYPE_BMP;
		return HGBASE_ERR_OK;
	}

	if (0 == _stricmp(p, ".png"))
	{
		*fmtType = HGIMGFMT_TYPE_PNG;
		return HGBASE_ERR_OK;
	}

	if (0 == _stricmp(p, ".tif") || 0 == _stricmp(p, ".tiff"))
	{
		*fmtType = HGIMGFMT_TYPE_TIFF;
		return HGBASE_ERR_OK;
	}

	if (0 == _stricmp(p, ".pdf"))
	{
		*fmtType = HGIMGFMT_TYPE_PDF;
		return HGBASE_ERR_OK;
	}

	if (0 == _stricmp(p, ".ofd"))
	{
		*fmtType = HGIMGFMT_TYPE_OFD;
		return HGBASE_ERR_OK;
	}
#else
	if (0 == strcasecmp(p, ".jpe") || 0 == strcasecmp(p, ".jpg") || 0 == strcasecmp(p, ".jpeg"))
	{
		*fmtType = HGIMGFMT_TYPE_JPEG;
		return HGBASE_ERR_OK;
	}

	if (0 == strcasecmp(p, ".bmp") || 0 == strcasecmp(p, ".dib"))
	{
		*fmtType = HGIMGFMT_TYPE_BMP;
		return HGBASE_ERR_OK;
	}

	if (0 == strcasecmp(p, ".png"))
	{
		*fmtType = HGIMGFMT_TYPE_PNG;
		return HGBASE_ERR_OK;
	}

	if (0 == strcasecmp(p, ".tif") || 0 == strcasecmp(p, ".tiff"))
	{
		*fmtType = HGIMGFMT_TYPE_TIFF;
		return HGBASE_ERR_OK;
	}

	if (0 == strcasecmp(p, ".pdf"))
	{
		*fmtType = HGIMGFMT_TYPE_PDF;
		return HGBASE_ERR_OK;
	}

	if (0 == strcasecmp(p, ".ofd"))
	{
		*fmtType = HGIMGFMT_TYPE_OFD;
		return HGBASE_ERR_OK;
	}
#endif

	return HGBASE_ERR_FAIL;
}

HGResult HGAPI HGImgFmt_IsMultiImgFmtType(HGUInt fmtType, HGBool* isMulti)
{
	if (fmtType < HGIMGFMT_TYPE_JPEG || fmtType > HGIMGFMT_TYPE_OFD || NULL == isMulti)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	if (HGIMGFMT_TYPE_JPEG == fmtType || HGIMGFMT_TYPE_BMP == fmtType || HGIMGFMT_TYPE_PNG == fmtType)
		*isMulti = HGFALSE;
	else
		*isMulti = HGTRUE;
	return HGBASE_ERR_OK;
}

HGResult HGAPI HGImgFmt_LoadImage(const HGChar* fileName, HGUInt fmtType, HGImgFmtLoadInfo* info,
	HGUInt imgType, HGUInt imgOrigin, HGImage* image)
{
	if (fmtType > HGIMGFMT_TYPE_OFD)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	if (HGIMGFMT_TYPE_JPEG == fmtType)
	{
		HGJpegLoadInfo jpegInfo;
		HGResult ret = HGImgFmt_LoadJpegImage(fileName, &jpegInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = jpegInfo.width;
			info->height = jpegInfo.height;
			info->bpp = jpegInfo.numComponents * 8;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_JPEGDENUNIT_INCH == jpegInfo.densityUnit)
			{
				info->xDpi = jpegInfo.xDensity;
				info->yDpi = jpegInfo.yDensity;
			}
			else if (HGIMGFMT_JPEGDENUNIT_CENTIMETER == jpegInfo.densityUnit)
			{
				info->xDpi = (uint32_t)((double)jpegInfo.xDensity / 0.393700787 + 0.5);
				info->yDpi = (uint32_t)((double)jpegInfo.yDensity / 0.393700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_BMP == fmtType)
	{
		HGBmpLoadInfo bmpInfo;
		HGResult ret = HGImgFmt_LoadBmpImage(fileName, &bmpInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = bmpInfo.width;
			info->height = bmpInfo.height;
			info->bpp = bmpInfo.bitCount;
			info->xDpi = (uint32_t)((double)bmpInfo.xPelsPerMeter / 39.3700787 + 0.5);
			info->yDpi = (uint32_t)((double)bmpInfo.yPelsPerMeter / 39.3700787 + 0.5);
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_PNG == fmtType)
	{
		HGPngLoadInfo pngInfo;
		HGResult ret = HGImgFmt_LoadPngImage(fileName, &pngInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = pngInfo.width;
			info->height = pngInfo.height;
			info->bpp = pngInfo.pixelDepth;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_PNGPHYSUNIT_METER == pngInfo.physUnitType)
			{
				info->xDpi = (uint32_t)((double)pngInfo.xPixelsPerUnit / 39.3700787 + 0.5);
				info->yDpi = (uint32_t)((double)pngInfo.yPixelsPerUnit / 39.3700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_TIFF == fmtType)
	{
		HGTiffLoadInfo tiffInfo;
		HGResult ret = HGImgFmt_LoadTiffImage(fileName, &tiffInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = tiffInfo.width;
			info->height = tiffInfo.height;
			info->bpp = tiffInfo.bitsPerSample * tiffInfo.samplesPerPixel;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_TIFFRESUNIT_INCH == tiffInfo.resolutionUnit)
			{
				info->xDpi = (uint32_t)(tiffInfo.xResolution + 0.5f);
				info->yDpi = (uint32_t)(tiffInfo.yResolution + 0.5f);
			}
			else if (HGIMGFMT_TIFFRESUNIT_CENTIMETER == tiffInfo.resolutionUnit)
			{
				info->xDpi = (uint32_t)((double)tiffInfo.xResolution / 0.393700787 + 0.5);
				info->yDpi = (uint32_t)((double)tiffInfo.yResolution / 0.393700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_PDF == fmtType)
	{
		HGResult ret = HGImgFmt_LoadPdfImage(fileName, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = 0;
			info->height = 0;
			info->bpp = 0;
			info->xDpi = 0;
			info->yDpi = 0;
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_OFD == fmtType)
	{
		HGResult ret = HGImgFmt_LoadOfdImage(fileName, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = 0;
			info->height = 0;
			info->bpp = 0;
			info->xDpi = 0;
			info->yDpi = 0;
		}

		return HGBASE_ERR_OK;
	}

	assert(0 == fmtType);

	HGJpegLoadInfo jpegInfo;
	if (HGBASE_ERR_OK == HGImgFmt_LoadJpegImage(fileName, &jpegInfo, imgType, imgOrigin, image))
	{
		if (NULL != info)
		{
			info->width = jpegInfo.width;
			info->height = jpegInfo.height;
			info->bpp = jpegInfo.numComponents * 8;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_JPEGDENUNIT_INCH == jpegInfo.densityUnit)
			{
				info->xDpi = jpegInfo.xDensity;
				info->yDpi = jpegInfo.yDensity;
			}
			else if (HGIMGFMT_JPEGDENUNIT_CENTIMETER == jpegInfo.densityUnit)
			{
				info->xDpi = (uint32_t)((double)jpegInfo.xDensity / 0.393700787 + 0.5);
				info->yDpi = (uint32_t)((double)jpegInfo.yDensity / 0.393700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}

	HGBmpLoadInfo bmpInfo;
	if (HGBASE_ERR_OK == HGImgFmt_LoadBmpImage(fileName, &bmpInfo, imgType, imgOrigin, image))
	{
		if (NULL != info)
		{
			info->width = bmpInfo.width;
			info->height = bmpInfo.height;
			info->bpp = bmpInfo.bitCount;
			info->xDpi = (uint32_t)((double)bmpInfo.xPelsPerMeter / 39.3700787 + 0.5);
			info->yDpi = (uint32_t)((double)bmpInfo.yPelsPerMeter / 39.3700787 + 0.5);
		}

		return HGBASE_ERR_OK;
	}

	HGPngLoadInfo pngInfo;
	if (HGBASE_ERR_OK == HGImgFmt_LoadPngImage(fileName, &pngInfo, imgType, imgOrigin, image))
	{
		if (NULL != info)
		{
			info->width = pngInfo.width;
			info->height = pngInfo.height;
			info->bpp = pngInfo.pixelDepth;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_PNGPHYSUNIT_METER == pngInfo.physUnitType)
			{
				info->xDpi = (uint32_t)((double)pngInfo.xPixelsPerUnit / 39.3700787 + 0.5);
				info->yDpi = (uint32_t)((double)pngInfo.yPixelsPerUnit / 39.3700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}

	HGTiffLoadInfo tiffInfo;
	if (HGBASE_ERR_OK == HGImgFmt_LoadTiffImage(fileName, &tiffInfo, imgType, imgOrigin, image))
	{
		if (NULL != info)
		{
			info->width = tiffInfo.width;
			info->height = tiffInfo.height;
			info->bpp = tiffInfo.bitsPerSample * tiffInfo.samplesPerPixel;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_TIFFRESUNIT_INCH == tiffInfo.resolutionUnit)
			{
				info->xDpi = (uint32_t)(tiffInfo.xResolution + 0.5f);
				info->yDpi = (uint32_t)(tiffInfo.yResolution + 0.5f);
			}
			else if (HGIMGFMT_TIFFRESUNIT_CENTIMETER == tiffInfo.resolutionUnit)
			{
				info->xDpi = (uint32_t)((double)tiffInfo.xResolution / 0.393700787 + 0.5);
				info->yDpi = (uint32_t)((double)tiffInfo.yResolution / 0.393700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}

	if (HGBASE_ERR_OK == HGImgFmt_LoadPdfImage(fileName, imgType, imgOrigin, image))
	{
		if (NULL != info)
		{
			info->width = 0;
			info->height = 0;
			info->bpp = 0;
			info->xDpi = 0;
			info->yDpi = 0;
		}

		return HGBASE_ERR_OK;
	}

	if (HGBASE_ERR_OK == HGImgFmt_LoadOfdImage(fileName, imgType, imgOrigin, image))
	{
		if (NULL != info)
		{
			info->width = 0;
			info->height = 0;
			info->bpp = 0;
			info->xDpi = 0;
			info->yDpi = 0;
		}

		return HGBASE_ERR_OK;
	}

	return HGBASE_ERR_FAIL;
}

HGResult HGAPI HGImgFmt_SaveImage(HGImage image, HGUInt fmtType, const HGImgFmtSaveInfo* info, const HGChar* fileName)
{
	if (fmtType > HGIMGFMT_TYPE_OFD)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	if (0 == fmtType)
	{
		HGImgFmt_GetImgFmtTypeFromFileName(fileName, &fmtType);
		if (fmtType < HGIMGFMT_TYPE_JPEG || fmtType > HGIMGFMT_TYPE_OFD)
		{
			return HGBASE_ERR_INVALIDARG;
		}
	}

	HGUInt xDpi = 96, yDpi = 96;
	HGBase_GetImageDpi(image, &xDpi, &yDpi);

	if (HGIMGFMT_TYPE_JPEG == fmtType)
	{
		HGJpegSaveInfo jpegInfo;
		HGJpegSaveInfo* pJpegInfo = NULL;

		if (NULL != info)
		{
			jpegInfo.quality = info->jpegQuality;
			jpegInfo.densityUnit = HGIMGFMT_JPEGDENUNIT_INCH;
			jpegInfo.xDensity = xDpi;
			jpegInfo.yDensity = yDpi;
			pJpegInfo = &jpegInfo;
		}

		return HGImgFmt_SaveJpegImage(image, pJpegInfo, fileName);
	}
	else if (HGIMGFMT_TYPE_BMP == fmtType)
	{
		HGBmpSaveInfo bmpInfo;
		HGBmpSaveInfo* pBmpInfo = NULL;

		if (NULL != info)
		{
			bmpInfo.xPelsPerMeter = (uint32_t)((double)xDpi * 39.3700787 + 0.5);
			bmpInfo.yPelsPerMeter = (uint32_t)((double)yDpi * 39.3700787 + 0.5);
			pBmpInfo = &bmpInfo;
		}

		return HGImgFmt_SaveBmpImage(image, pBmpInfo, fileName);
	}
	else if (HGIMGFMT_TYPE_PNG == fmtType)
	{
		HGPngSaveInfo pngInfo;
		HGPngSaveInfo* pPngInfo = NULL;

		if (NULL != info)
		{
			pngInfo.physUnitType = HGIMGFMT_PNGPHYSUNIT_METER;
			pngInfo.xPixelsPerUnit = (uint32_t)((double)xDpi * 39.3700787 + 0.5);
			pngInfo.yPixelsPerUnit = (uint32_t)((double)yDpi * 39.3700787 + 0.5);
			pPngInfo = &pngInfo;
		}

		return HGImgFmt_SavePngImage(image, pPngInfo, fileName);
	}
	else if (HGIMGFMT_TYPE_TIFF == fmtType)
	{
		HGTiffSaveInfo tiffInfo;
		HGTiffSaveInfo* pTiffInfo = NULL;

		if (NULL != info)
		{
			tiffInfo.compression = info->tiffCompression;
			tiffInfo.jpegQuality = info->tiffJpegQuality;
			tiffInfo.resolutionUnit = HGIMGFMT_TIFFRESUNIT_INCH;
			tiffInfo.xResolution = (float)xDpi;
			tiffInfo.yResolution = (float)yDpi;
			pTiffInfo = &tiffInfo;
		}

		return HGImgFmt_SaveTiffImage(image, pTiffInfo, fileName);
	}
	else if (HGIMGFMT_TYPE_PDF == fmtType)
	{
		HGJpegSaveInfo jpegInfo;
		HGJpegSaveInfo* pJpegInfo = NULL;

		if (NULL != info)
		{
			jpegInfo.quality = info->jpegQuality;
			jpegInfo.densityUnit = HGIMGFMT_JPEGDENUNIT_INCH;
			jpegInfo.xDensity = xDpi;
			jpegInfo.yDensity = yDpi;
			pJpegInfo = &jpegInfo;
		}

		return HGImgFmt_SavePdfJpegImage(image, pJpegInfo, fileName);
	}

	assert(HGIMGFMT_TYPE_OFD == fmtType);

	HGJpegSaveInfo jpegInfo;
	HGJpegSaveInfo* pJpegInfo = NULL;

	if (NULL != info)
	{
		jpegInfo.quality = info->jpegQuality;
		jpegInfo.densityUnit = HGIMGFMT_JPEGDENUNIT_INCH;
		jpegInfo.xDensity = xDpi;
		jpegInfo.yDensity = yDpi;
		pJpegInfo = &jpegInfo;
	}

	return HGImgFmt_SaveOfdJpegImage(image, pJpegInfo, fileName);
}

HGResult HGAPI HGImgFmt_OpenImageReader(const HGChar* fileName, HGUInt fmtType, HGImgFmtReader* reader)
{
	if (NULL == fileName || fmtType > HGIMGFMT_TYPE_OFD || NULL == reader)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	if (HGIMGFMT_TYPE_JPEG == fmtType || HGIMGFMT_TYPE_BMP == fmtType
		|| HGIMGFMT_TYPE_PNG == fmtType)
	{
		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = fmtType;
		imgFmtReaderImpl->handle = NULL;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_TIFF == fmtType)
	{
		HGTiffReader tiffReader = NULL;
		HGResult ret = HGImgFmt_OpenTiffReader(fileName, &tiffReader);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = fmtType;
		imgFmtReaderImpl->handle = tiffReader;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_PDF == fmtType)
	{
		HGPdfReader pdfReader = NULL;
		HGResult ret = HGImgFmt_OpenPdfReader(fileName, &pdfReader);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = fmtType;
		imgFmtReaderImpl->handle = pdfReader;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_OFD == fmtType)
	{
		HGOfdReader ofdReader = NULL;
		HGResult ret = HGImgFmt_OpenOfdReader(fileName, &ofdReader);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = fmtType;
		imgFmtReaderImpl->handle = ofdReader;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}

	assert(0 == fmtType);

	HGBool isJpeg = HGFALSE;
	HGImgFmt_CheckJpegFile(fileName, &isJpeg);
	if (isJpeg)
	{
		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = HGIMGFMT_TYPE_JPEG;
		imgFmtReaderImpl->handle = NULL;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}

	HGBool isBmp = HGFALSE;
	HGImgFmt_CheckBmpFile(fileName, &isBmp);
	if (isBmp)
	{
		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = HGIMGFMT_TYPE_BMP;
		imgFmtReaderImpl->handle = NULL;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}

	HGBool isPng = HGFALSE;
	HGImgFmt_CheckPngFile(fileName, &isPng);
	if (isPng)
	{
		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = HGIMGFMT_TYPE_PNG;
		imgFmtReaderImpl->handle = NULL;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}

	HGTiffReader tiffReader = NULL;
	HGResult ret = HGImgFmt_OpenTiffReader(fileName, &tiffReader);
	if (HGBASE_ERR_OK == ret)
	{
		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = HGIMGFMT_TYPE_TIFF;
		imgFmtReaderImpl->handle = tiffReader;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}

	HGPdfReader pdfReader = NULL;
	ret = HGImgFmt_OpenPdfReader(fileName, &pdfReader);
	if (HGBASE_ERR_OK == ret)
	{
		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = HGIMGFMT_TYPE_PDF;
		imgFmtReaderImpl->handle = pdfReader;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}

	HGOfdReader ofdReader = NULL;
	ret = HGImgFmt_OpenOfdReader(fileName, &ofdReader);
	if (HGBASE_ERR_OK == ret)
	{
		HGImgFmtReaderImpl* imgFmtReaderImpl = new HGImgFmtReaderImpl;
		imgFmtReaderImpl->fileName = fileName;
		imgFmtReaderImpl->fmtType = HGIMGFMT_TYPE_OFD;
		imgFmtReaderImpl->handle = ofdReader;
		*reader = (HGImgFmtReader)imgFmtReaderImpl;
		return HGBASE_ERR_OK;
	}

	return HGBASE_ERR_FAIL;
}

HGResult HGAPI HGImgFmt_CloseImageReader(HGImgFmtReader reader)
{
	if (NULL == reader)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	HGImgFmtReaderImpl* imgFmtReaderImpl = (HGImgFmtReaderImpl*)reader;
	if (HGIMGFMT_TYPE_TIFF == imgFmtReaderImpl->fmtType)
		HGImgFmt_CloseTiffReader((HGTiffReader)imgFmtReaderImpl->handle);
	else if (HGIMGFMT_TYPE_PDF == imgFmtReaderImpl->fmtType)
		HGImgFmt_ClosePdfReader((HGPdfReader)imgFmtReaderImpl->handle);
	else if (HGIMGFMT_TYPE_OFD == imgFmtReaderImpl->fmtType)
		HGImgFmt_CloseOfdReader((HGOfdReader)imgFmtReaderImpl->handle);

	delete imgFmtReaderImpl;
	return HGBASE_ERR_OK;
}

HGResult HGAPI HGImgFmt_GetImagePageCount(HGImgFmtReader reader, HGUInt* count)
{
	if (NULL == reader || NULL == count)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	HGImgFmtReaderImpl* imgFmtReaderImpl = (HGImgFmtReaderImpl*)reader;
	if (HGIMGFMT_TYPE_TIFF == imgFmtReaderImpl->fmtType)
		return HGImgFmt_GetTiffPageCount((HGTiffReader)imgFmtReaderImpl->handle, count);
	else if (HGIMGFMT_TYPE_PDF == imgFmtReaderImpl->fmtType)
		return HGImgFmt_GetPdfPageCount((HGPdfReader)imgFmtReaderImpl->handle, count);
	else if (HGIMGFMT_TYPE_OFD == imgFmtReaderImpl->fmtType)
		return HGImgFmt_GetOfdPageCount((HGOfdReader)imgFmtReaderImpl->handle, count);

	*count = 1;
	return HGBASE_ERR_OK;
}

HGResult HGAPI HGImgFmt_LoadImageFromReader(HGImgFmtReader reader, HGUInt index, HGImgFmtLoadInfo* info, 
	HGUInt imgType, HGUInt imgOrigin, HGImage* image)
{
	if (NULL == reader)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	HGImgFmtReaderImpl* imgFmtReaderImpl = (HGImgFmtReaderImpl*)reader;
	if (HGIMGFMT_TYPE_JPEG == imgFmtReaderImpl->fmtType)
	{
		if (0 != index)
		{
			return HGBASE_ERR_INVALIDARG;
		}

		HGJpegLoadInfo jpegInfo;
		HGResult ret = HGImgFmt_LoadJpegImage(imgFmtReaderImpl->fileName.c_str(), &jpegInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = jpegInfo.width;
			info->height = jpegInfo.height;
			info->bpp = jpegInfo.numComponents * 8;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_JPEGDENUNIT_INCH == jpegInfo.densityUnit)
			{
				info->xDpi = jpegInfo.xDensity;
				info->yDpi = jpegInfo.yDensity;
			}
			else if (HGIMGFMT_JPEGDENUNIT_CENTIMETER == jpegInfo.densityUnit)
			{
				info->xDpi = (uint32_t)((double)jpegInfo.xDensity / 0.393700787 + 0.5);
				info->yDpi = (uint32_t)((double)jpegInfo.yDensity / 0.393700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_BMP == imgFmtReaderImpl->fmtType)
	{
		if (0 != index)
		{
			return HGBASE_ERR_INVALIDARG;
		}

		HGBmpLoadInfo bmpInfo;
		HGResult ret = HGImgFmt_LoadBmpImage(imgFmtReaderImpl->fileName.c_str(), &bmpInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = bmpInfo.width;
			info->height = bmpInfo.height;
			info->bpp = bmpInfo.bitCount;
			info->xDpi = (uint32_t)((double)bmpInfo.xPelsPerMeter / 39.3700787 + 0.5);
			info->yDpi = (uint32_t)((double)bmpInfo.yPelsPerMeter / 39.3700787 + 0.5);
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_PNG == imgFmtReaderImpl->fmtType)
	{
		if (0 != index)
		{
			return HGBASE_ERR_INVALIDARG;
		}

		HGPngLoadInfo pngInfo;
		HGResult ret = HGImgFmt_LoadPngImage(imgFmtReaderImpl->fileName.c_str(), &pngInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = pngInfo.width;
			info->height = pngInfo.height;
			info->bpp = pngInfo.pixelDepth;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_PNGPHYSUNIT_METER == pngInfo.physUnitType)
			{
				info->xDpi = (uint32_t)((double)pngInfo.xPixelsPerUnit / 39.3700787 + 0.5);
				info->yDpi = (uint32_t)((double)pngInfo.yPixelsPerUnit / 39.3700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_TIFF == imgFmtReaderImpl->fmtType)
	{
		HGTiffLoadInfo tiffInfo;
		HGResult ret = HGImgFmt_LoadImageFromTiffReader((HGTiffReader)imgFmtReaderImpl->handle, index, &tiffInfo, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = tiffInfo.width;
			info->height = tiffInfo.height;
			info->bpp = tiffInfo.bitsPerSample * tiffInfo.samplesPerPixel;
			info->xDpi = 0;
			info->yDpi = 0;
			if (HGIMGFMT_TIFFRESUNIT_INCH == tiffInfo.resolutionUnit)
			{
				info->xDpi = (uint32_t)(tiffInfo.xResolution + 0.5f);
				info->yDpi = (uint32_t)(tiffInfo.yResolution + 0.5f);
			}
			else if (HGIMGFMT_TIFFRESUNIT_CENTIMETER == tiffInfo.resolutionUnit)
			{
				info->xDpi = (uint32_t)((double)tiffInfo.xResolution / 0.393700787 + 0.5);
				info->yDpi = (uint32_t)((double)tiffInfo.yResolution / 0.393700787 + 0.5);
			}
		}

		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_PDF == imgFmtReaderImpl->fmtType)
	{
		HGResult ret = HGImgFmt_LoadImageFromPdfReader((HGPdfReader)imgFmtReaderImpl->handle, index, 1.0f, 1.0f, imgType, imgOrigin, image);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		if (NULL != info)
		{
			info->width = 0;
			info->height = 0;
			info->bpp = 0;
			info->xDpi = 0;
			info->yDpi = 0;
		}

		return HGBASE_ERR_OK;
	}

	assert(HGIMGFMT_TYPE_OFD == imgFmtReaderImpl->fmtType);

	HGResult ret = HGImgFmt_LoadImageFromOfdReader((HGOfdReader)imgFmtReaderImpl->handle, index, 1.0f, 1.0f, imgType, imgOrigin, image);
	if (HGBASE_ERR_OK != ret)
	{
		return ret;
	}

	if (NULL != info)
	{
		info->width = 0;
		info->height = 0;
		info->bpp = 0;
		info->xDpi = 0;
		info->yDpi = 0;
	}

	return HGBASE_ERR_OK;
}

HGResult HGAPI HGImgFmt_OpenImageWriter(const HGChar* fileName, HGUInt fmtType, HGImgFmtWriter* writer)
{
	if (fmtType > HGIMGFMT_TYPE_OFD || NULL == writer)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	if (0 == fmtType)
	{
		HGImgFmt_GetImgFmtTypeFromFileName(fileName, &fmtType);
		if (fmtType < HGIMGFMT_TYPE_JPEG || fmtType > HGIMGFMT_TYPE_OFD)
		{
			return HGBASE_ERR_INVALIDARG;
		}
	}

	if (HGIMGFMT_TYPE_JPEG == fmtType || HGIMGFMT_TYPE_BMP == fmtType
		|| HGIMGFMT_TYPE_PNG == fmtType)
	{
		HGImgFmtWriterImpl* imgFmtWriterImpl = new HGImgFmtWriterImpl;
		imgFmtWriterImpl->fileName = fileName;
		imgFmtWriterImpl->fmtType = fmtType;
		imgFmtWriterImpl->handle = NULL;
		imgFmtWriterImpl->write = HGFALSE;
		*writer = (HGImgFmtWriter)imgFmtWriterImpl;
		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_TIFF == fmtType)
	{
		HGTiffWriter tiffWriter = NULL;
		HGResult ret = HGImgFmt_OpenTiffWriter(fileName, &tiffWriter);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		HGImgFmtWriterImpl* imgFmtWriterImpl = new HGImgFmtWriterImpl;
		imgFmtWriterImpl->fileName = fileName;
		imgFmtWriterImpl->fmtType = fmtType;
		imgFmtWriterImpl->handle = tiffWriter;
		imgFmtWriterImpl->write = HGFALSE;
		*writer = (HGImgFmtWriter)imgFmtWriterImpl;
		return HGBASE_ERR_OK;
	}
	else if (HGIMGFMT_TYPE_PDF == fmtType)
	{
		HGPdfImageWriter pdfWriter = NULL;
		HGResult ret = HGImgFmt_OpenPdfImageWriter(fileName, &pdfWriter);
		if (HGBASE_ERR_OK != ret)
		{
			return ret;
		}

		HGImgFmtWriterImpl* imgFmtWriterImpl = new HGImgFmtWriterImpl;
		imgFmtWriterImpl->fileName = fileName;
		imgFmtWriterImpl->fmtType = fmtType;
		imgFmtWriterImpl->handle = pdfWriter;
		imgFmtWriterImpl->write = HGFALSE;
		*writer = (HGImgFmtWriter)imgFmtWriterImpl;
		return HGBASE_ERR_OK;
	}

	assert(HGIMGFMT_TYPE_OFD == fmtType);

	HGOfdImageWriter ofdWriter = NULL;
	HGResult ret = HGImgFmt_OpenOfdImageWriter(fileName, &ofdWriter);
	if (HGBASE_ERR_OK != ret)
	{
		return ret;
	}

	HGImgFmtWriterImpl* imgFmtWriterImpl = new HGImgFmtWriterImpl;
	imgFmtWriterImpl->fileName = fileName;
	imgFmtWriterImpl->fmtType = fmtType;
	imgFmtWriterImpl->handle = ofdWriter;
	imgFmtWriterImpl->write = HGFALSE;
	*writer = (HGImgFmtWriter)imgFmtWriterImpl;
	return HGBASE_ERR_OK;
}

HGResult HGAPI HGImgFmt_CloseImageWriter(HGImgFmtWriter writer)
{
	if (NULL == writer)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	HGImgFmtWriterImpl* imgFmtWriterImpl = (HGImgFmtWriterImpl*)writer;
	if (HGIMGFMT_TYPE_TIFF == imgFmtWriterImpl->fmtType)
		HGImgFmt_CloseTiffWriter((HGTiffWriter)imgFmtWriterImpl->handle);
	else if (HGIMGFMT_TYPE_PDF == imgFmtWriterImpl->fmtType)
		HGImgFmt_ClosePdfImageWriter((HGPdfImageWriter)imgFmtWriterImpl->handle);
	else if (HGIMGFMT_TYPE_OFD == imgFmtWriterImpl->fmtType)
		HGImgFmt_CloseOfdImageWriter((HGOfdImageWriter)imgFmtWriterImpl->handle);

	delete imgFmtWriterImpl;
	return HGBASE_ERR_OK;
}

HGResult HGAPI HGImgFmt_SaveImageToWriter(HGImgFmtWriter writer, HGImage image, const HGImgFmtSaveInfo* info)
{
	if (NULL == writer)
	{
		return HGBASE_ERR_INVALIDARG;
	}

	HGUInt xDpi = 96, yDpi = 96;
	HGBase_GetImageDpi(image, &xDpi, &yDpi);

	HGImgFmtWriterImpl* imgFmtWriterImpl = (HGImgFmtWriterImpl*)writer;
	if (HGIMGFMT_TYPE_JPEG == imgFmtWriterImpl->fmtType)
	{
		if (imgFmtWriterImpl->write)
		{
			return HGBASE_ERR_FAIL;
		}

		HGJpegSaveInfo jpegInfo;
		HGJpegSaveInfo* pJpegInfo = NULL;

		if (NULL != info)
		{
			jpegInfo.quality = info->jpegQuality;
			jpegInfo.densityUnit = HGIMGFMT_JPEGDENUNIT_INCH;
			jpegInfo.xDensity = xDpi;
			jpegInfo.yDensity = yDpi;
			pJpegInfo = &jpegInfo;
		}

		HGResult ret = HGImgFmt_SaveJpegImage(image, pJpegInfo, imgFmtWriterImpl->fileName.c_str());
		if (HGBASE_ERR_OK == ret)
		{
			imgFmtWriterImpl->write = HGTRUE;
		}

		return ret;
	}
	else if (HGIMGFMT_TYPE_BMP == imgFmtWriterImpl->fmtType)
	{
		if (imgFmtWriterImpl->write)
		{
			return HGBASE_ERR_FAIL;
		}

		HGBmpSaveInfo bmpInfo;
		HGBmpSaveInfo* pBmpInfo = NULL;

		if (NULL != info)
		{
			bmpInfo.xPelsPerMeter = (uint32_t)((double)xDpi * 39.3700787 + 0.5);
			bmpInfo.yPelsPerMeter = (uint32_t)((double)yDpi * 39.3700787 + 0.5);
			pBmpInfo = &bmpInfo;
		}

		HGResult ret = HGImgFmt_SaveBmpImage(image, pBmpInfo, imgFmtWriterImpl->fileName.c_str());
		if (HGBASE_ERR_OK == ret)
		{
			imgFmtWriterImpl->write = HGTRUE;
		}

		return ret;
	}
	else if (HGIMGFMT_TYPE_PNG == imgFmtWriterImpl->fmtType)
	{
		if (imgFmtWriterImpl->write)
		{
			return HGBASE_ERR_FAIL;
		}

		HGPngSaveInfo pngInfo;
		HGPngSaveInfo* pPngInfo = NULL;

		if (NULL != info)
		{
			pngInfo.physUnitType = HGIMGFMT_PNGPHYSUNIT_METER;
			pngInfo.xPixelsPerUnit = (uint32_t)((double)xDpi * 39.3700787 + 0.5);
			pngInfo.yPixelsPerUnit = (uint32_t)((double)yDpi * 39.3700787 + 0.5);
			pPngInfo = &pngInfo;
		}

		HGResult ret = HGImgFmt_SavePngImage(image, pPngInfo, imgFmtWriterImpl->fileName.c_str());
		if (HGBASE_ERR_OK == ret)
		{
			imgFmtWriterImpl->write = HGTRUE;
		}

		return ret;
	}
	else if (HGIMGFMT_TYPE_TIFF == imgFmtWriterImpl->fmtType)
	{
		HGTiffSaveInfo tiffInfo;
		HGTiffSaveInfo* pTiffInfo = NULL;

		if (NULL != info)
		{
			tiffInfo.compression = info->tiffCompression;
			tiffInfo.jpegQuality = info->tiffJpegQuality;
			tiffInfo.resolutionUnit = HGIMGFMT_TIFFRESUNIT_INCH;
			tiffInfo.xResolution = (float)xDpi;
			tiffInfo.yResolution = (float)yDpi;
			pTiffInfo = &tiffInfo;
		}

		return HGImgFmt_SaveImageToTiffWriter((HGTiffWriter)imgFmtWriterImpl->handle, image, pTiffInfo);
	}
	else if (HGIMGFMT_TYPE_PDF == imgFmtWriterImpl->fmtType)
	{
		HGJpegSaveInfo jpegInfo;
		HGJpegSaveInfo* pJpegInfo = NULL;

		if (NULL != info)
		{
			jpegInfo.quality = info->jpegQuality;
			jpegInfo.densityUnit = HGIMGFMT_JPEGDENUNIT_INCH;
			jpegInfo.xDensity = xDpi;
			jpegInfo.yDensity = yDpi;
			pJpegInfo = &jpegInfo;
		}

		return HGImgFmt_SaveJpegImageToPdfImageWriter((HGPdfImageWriter)imgFmtWriterImpl->handle, image, pJpegInfo);
	}

	assert(HGIMGFMT_TYPE_OFD == imgFmtWriterImpl->fmtType);

	HGJpegSaveInfo jpegInfo;
	HGJpegSaveInfo* pJpegInfo = NULL;

	if (NULL != info)
	{
		jpegInfo.quality = info->jpegQuality;
		jpegInfo.densityUnit = HGIMGFMT_JPEGDENUNIT_INCH;
		jpegInfo.xDensity = xDpi;
		jpegInfo.yDensity = yDpi;
		pJpegInfo = &jpegInfo;
	}

	return HGImgFmt_SaveJpegImageToOfdImageWriter((HGOfdImageWriter)imgFmtWriterImpl->handle, image, pJpegInfo);
}