照片处理小工具三合一设计到实现（三）

int CCloneExif::ClonePicExif(const char* pInputPath, const char* pSavePath, const int& nProcessIndex)
{
CGdalUser gu;
if (!gu.Initialize(pSavePath))
{
return -1;
}

//获取exif信息
ExifPathsTags pathsTags;
ExifImageFile               inImageFile;
ExifStatus                  status(EXIF_INVALID_FORMAT_ERROR);
ExifStatus					openStatus(EXIF_INVALID_FORMAT_ERROR);
std::string dstExtension = CStdStr::ToUpperLower(CStdStr::GetSuffixOfFile(pInputPath));
bool bExif = 0 == strcmp(dstExtension.c_str(), ".jpg") || 0 == strcmp(dstExtension.c_str(), ".jpeg");
if (bExif)
{
openStatus = inImageFile.open(pInputPath, "r+");
if (openStatus != EXIF_OK)	//不能用w打开照片，打开后会重新创建一张照片并将原来的照片覆盖掉
{
inImageFile.close();
}
status = inImageFile.getAllTags(0xFFE1, "Exif", pathsTags) ;
if (status != EXIF_OK)
{
inImageFile.close();
}
}

int nNewWidth = -1, nNewHeight = -1;
unsigned char* pData = nullptr;
bool bGif = 0 == strcmp(dstExtension.c_str(), ".gif");
//增加exif信息，保存为jpg
std::string sSavePath = CStdStr::ReplaceSuffix(pSavePath, ".jpg");
if (bGif)
{
//Gif文件需要单独处理
if (CxImageUser::gif2jpg(CStdStr::s2ws(pSavePath), CStdStr::s2ws(sSavePath)))
{
g_vLog[nProcessIndex] = (std::string(pInputPath) + "->" + std::string(sSavePath) + '\n');
}
else
{
//保存失败
g_vLog[nProcessIndex] = ("CloneExif" +  std::string(pInputPath) + " Failed!" + '\n');

return -1;
}
}
else if(gu.readImageGDAL(&pData, nNewWidth, nNewHeight, gu.m_nBandNum, pSavePath))
{
//保存结果
if (gu.WriteImageGDAL(sSavePath.c_str(), pData, nNewWidth, nNewHeight, gu.m_nBandNum))
{
if (status == EXIF_OK)
{
SetPicExifInfo(sSavePath.c_str(), pathsTags);
}
g_vLog[nProcessIndex] = (std::string(pInputPath) + "->" + std::string(pSavePath) + '\n');
}
else
{
//保存失败
g_vLog[nProcessIndex] = ("CloneExif" +  std::string(pInputPath) + " Failed!" + '\n');

return -1;
}

delete[] pData;
pData = nullptr;
}

return 0;
}