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分享一个C语言写的生成二维码的库,可以保存为BMP文件也可以直接显示在GDI上。
Demo下载地址:https://pan.baidu.com/s/1c1UmRhY
- #include <windows.h>
- #include "qrencode.h"
- QRcode* pQRC = NULL;
- LRESULT CALLBACK MyWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
- int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )
- {
- if (pQRC = QRcode_encodeString("测试二维码", 0, QR_ECLEVEL_H, QR_MODE_8, 1))
- {
- QRcode_NewBGR24(pQRC,0x00,0x00,0x00);
- QRcode_SaveBMP(pQRC,"1.bmp");
- char* clsName = "MyApp";
- WNDCLASS wc;
- ZeroMemory(&wc,sizeof(WNDCLASS));
- wc.hInstance = hInstance;
- wc.lpszClassName = clsName;
- wc.lpfnWndProc = MyWindowProc;
- wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
- wc.style = CS_HREDRAW | CS_VREDRAW;
- RegisterClass(&wc);
- HWND hMainwind = CreateWindow(clsName,"二维码",WS_OVERLAPPEDWINDOW,
- 400,300,600,500,NULL,NULL,hInstance,NULL);
- if(hMainwind == NULL) return 0;
- ShowWindow(hMainwind,SW_NORMAL);
- MSG msg;
- while(GetMessage(&msg,NULL,0,0))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
-
- QRcode_free(pQRC);
- return 0;
- }
- return 1;
- }
- LRESULT CALLBACK MyWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
- {
- switch(msg)
- {
- case WM_PAINT:
- {
- PAINTSTRUCT ps;
- BeginPaint(hwnd, &ps);
- RECT rect;
- GetClientRect(hwnd,&rect);
- BYTE *src_buff_ex = new BYTE[pQRC->rgbW*pQRC->rgbW*4];
- for(int i=0, j=0; j < pQRC->rgbW*pQRC->rgbW*4; i+=3, j+=4)
- {
- *(src_buff_ex+j) = *(pQRC->rgbData+i);
- *(src_buff_ex+j+1) = *(pQRC->rgbData+i+1);
- *(src_buff_ex+j+2) = *(pQRC->rgbData+i+2);
- *(src_buff_ex+j+3) = 0;
- }
- HDC hMemDC_ = CreateCompatibleDC(ps.hdc);
- HBITMAP hBitmapSrc_ = CreateCompatibleBitmap(ps.hdc, pQRC->rgbW, pQRC->rgbW);
- SelectObject(hMemDC_, hBitmapSrc_);
-
- long err = SetBitmapBits(hBitmapSrc_, pQRC->rgbW*pQRC->rgbW*4, src_buff_ex);
- if(err != 0)
- {
- BitBlt(ps.hdc, (rect.right-pQRC->rgbW)/2, (rect.bottom-pQRC->rgbW)/2,
- pQRC->rgbW, pQRC->rgbW, hMemDC_, 0, 0, SRCCOPY);
- }
-
- DeleteObject(hBitmapSrc_);
- DeleteDC(hMemDC_);
- free(src_buff_ex);
- EndPaint(hwnd, &ps);
- }
- break;
- case WM_DESTROY:
- {
- PostQuitMessage(0);
- }return 0;
- default:break;
- }
- return DefWindowProc(hwnd,msg,wParam,lParam);
- }
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