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windows 下C++实现触摸屏手写签名以及保存签名图片

windwos C++ gdi++实现jpg图像压缩-图像裁剪和缩放-图像格式转换-图像dpi修改

Linux下C++代码实现区分arm64，mips64，x86_64等不同的系统架构，完整源码，简单易用

linux下 C++查找vid和pid的USB设备，适合x86 arm64 mips64等系统，完美兼容

gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.gz arm64/32交叉编译工具，解压后安装即可，无需编译

linux下采用开源库Magick++实现图片合成，图片添加中英文字体：需要自己下载编译Magick++,如下为部分代码，下载可看完整代码 #include #include #include #include #include #define MAGICKCORE_QUANTUM_DEPTH 16 #define MAGICKCORE_HDRI_ENABLE 1 //#define _GLIBCXX_USE_CXX11_ABI 0L #define BI_RGB 0L using namespace std; using namespace Magick; bool bCHMixBack(char *JiGuan, char *DateBegain,char *DateEnd,char *BackGroundpic,char *toPic); bool bCHMixBack(char *JiGuan, char *DateBegain,char *DateEnd,char *BackGroundpic,char *toPic) { std::vector draws; Magick::Image img; img.read( BackGroundpic ); printf(BackGroundpic); printf("\nBackGroundpic end\n"); //draws.push_back(Magick::DrawableFont("黑体",(Magick::StyleType)AnyStyle,600,(Magick::StretchType)AnyStretch)); //设置字体 宋体 黑体 微软雅黑// /* Magick::DrawableFont Font = Magick::DrawableFont("黑体",(Magick::StyleType)NormalStyle,400,(Magick::StretchType)AnyStretch);//"/usr/share/fonts/simhei.ttf" draws.push_back(Font); draws.push_back(Magick::DrawablePointSize(22)); //设置字体大小 draws.push_back(Magick::DrawableFillColor(Magick::Color("black")));//字体颜色 char szDate[255]={0}; sprintf(szDate,"%s-%s",DateBegain,DateEnd); draws.push_back(Magick::DrawableText(200,276,"33")); //draws.push_back(Magick::DrawableText(200,276,szDate)); //draws.push_back(Magick::DrawableText(200,240,JiGuan)); printf("\n"); printf(szDate); printf("\n"); printf(JiGuan); printf("\n++++bCHMixBack img.draw(draws)\n"); img.draw(draws); */ string family_ = "黑体"; img.fontFamily(family_); img.fontPointsize(22); img.fontWeight(600); img.fillColor(Magick::Color("black")); img.fontStyle((Magick::StyleType)NormalStyle); Magick::DrawableText text(200,276,"字体颜色"); img.draw(text); printf("\n++++bCHMixBackimg.draw(draws) End\n"); int len = strlen(toPic); if(toPic[len-5]=='.') { len -=4; } else if(toPic[len-4]=='.')

计算文本数据MD5，完全源代码，无任何依赖库 int main(int argc, char* argv[]) { int i =0,j,len; MD5Context context; unsigned char buff[16]; char * str1 = ""; char * str2 = "abc"; char * str3 = "message digest"; char * str4 = "abcdefghijklmnopqrstuvwxyz"; char * str5 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; char * str6 = "12345678901234567890123456789012345678901234567890123456789012345678901234567890"; char str[7][100] = { "", "a", "abc", "message digest", "abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", "12345678901234567890123456789012345678901234567890123456789012345678901234567890" }; for(i=0;i<7;i++) { len = strlen(str[i]); MD5_Init(&context); MD5_Update(&context,(unsigned char *)str[i], len); MD5_Final(&context,buff); printf("MD5(\"%s\") = \n",str[i]); for(j=0;j<16;j++) { printf("%x",(buff[j] & 0xF0)>>4); printf("%x",buff[j] & 0x0F); } printf("\n***********************************************************\n"); } printf("Wating...\n"); MD5_File("00.dat"); system("pause"); return 0; }

1/2/4/8/16/24/32位图转换代码 BOOL SaveTrueBmp(char* p_SrcFileName, char* p_szNewBitCountFile, WORD wBitCountIN) { HBITMAP hBitmap=(HBITMAP)LoadImage(NULL,p_SrcFileName,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION|LR_DEFAULTSIZE); //设备描述表 HDC hDC; //位图中每象素所占字节数为1/2/4/8/16/24/32 WORD wBitCount = wBitCountIN; //定义调色板大小， 位图中像素字节大小 ，位图文件大小 ， 写入文件字节数 DWORD dwPaletteSize=0, dwBmBitsSize=0, dwDIBSize=0, dwWritten=0; //位图属性结构 BITMAP Bitmap; //位图文件头结构 BITMAPFILEHEADER bmfHdr; //位图信息头结构 BITMAPINFOHEADER bi; //指向位图信息头结构 LPBITMAPINFOHEADER lpbi; //定义文件，分配内存句柄，调色板句柄 HANDLE fh=0, hDib=0, hPal=0,hOldPal=NULL; GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap); bi.biSize = sizeof(BITMAPINFOHEADER); bi.biWidth = Bitmap.bmWidth; bi.biHeight = Bitmap.bmHeight; bi.biPlanes = 1; bi.biBitCount = wBitCount; bi.biCompression = BI_RGB; bi.biSizeImage = 0; bi.biXPelsPerMeter = 0; bi.biYPelsPerMeter = 0; bi.biClrImportant = 0; bi.biClrUsed = 0;

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