1、C++在Unicode和MBCS之间相互转换函数
BOOL MByteToWChar(LPCSTR lpcszStr, LPWSTR lpwszStr, DWORD dwSize) { DWORD dwMinSize; dwMinSize = MultiByteToWideChar(CP_ACP, 0, lpcszStr, -1, NULL, 0); if (dwSize < dwMinSize) { return FALSE; } MultiByteToWideChar(CP_ACP, 0, lpcszStr, -1, lpwszStr, dwMinSize); return TRUE; } BOOL WCharToMByte(LPCWSTR lpcwszStr, LPSTR lpszStr, DWORD dwSize) { DWORD dwMinSize; dwMinSize = WideCharToMultiByte(CP_OEMCP, NULL, lpcwszStr, -1, NULL, 0, NULL, FALSE); if (dwSize < dwMinSize) { return FALSE; } WideCharToMultiByte(CP_OEMCP, NULL, lpcwszStr, -1, lpszStr, dwSize, NULL, FALSE); return TRUE; }
使用方法：
wchar_t wText[255] = {L"你好"};
char sText[255]= {0};
WCharToMByte(wText,sText,sizeof(sText)/sizeof(sText[0]));//宽字节转多字节
MByteToWChar(sText,wText,sizeof(wText)/sizeof(wText[0]));//多字节转宽字节
2、std:string的格式化
#ifndef NOT_SAVE_IMAGE std::string name; std::stringstream ss1; ss1.str(""); ss1 << "imageSrc"; ss1 << index; ss1 << ".jpg"; name = ss1.str(); _saveImageMat(name, imageSrc); ss1.str(""); ss1 << "imageDst"; ss1 << index; ss1 << ".jpg"; name = ss1.str(); _saveImageMat(name, imageDst); #endif void CGPUTest::_saveImageMat(std::string path, const cv::Mat& img) { //根据扩展名来决定储存jpg还是bmp if (path.find("jpg") != path.npos)//找到了jpg,一个特别的标志c++中用npos表示 { vector<int> compression_params; compression_params.push_back(cv::IMWRITE_JPEG_QUALITY);//选择jpeg compression_params.push_back(100);//在这个填入你要的图片质量,默认值是95,100代表满分 cv::imwrite(path, img, compression_params);//根据路径,保存为jpg格式 } else { cv::imwrite(path, img);//根据路径,保存为bmpg格式 } }
