windows gdi截圖儲存bmp

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/* * windows gdi截屏儲存bmp檔案 */#include "stdio.h"#include "windows.h"void save_bgrdata_to_bmp(void *data, int size, int width, int height,char *bmpPath,int bpp)  {  BITMAPFILEHEADER bmpheader;BITMAPINFOHEADER bmpinfo;FILE *fp = fopen(bmpPath,"wb+");bmpheader.bfType = 0x4d42;  bmpheader.bfReserved1 = 0;  bmpheader.bfReserved2 = 0;  bmpheader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);  bmpheader.bfSize = bmpheader.bfOffBits + width*height*bpp/8;  bmpinfo.biSize = sizeof(BITMAPINFOHEADER);  bmpinfo.biWidth = width;  bmpinfo.biHeight = -height;  bmpinfo.biPlanes = 1;  bmpinfo.biBitCount = bpp;  bmpinfo.biCompression = BI_RGB;  bmpinfo.biSizeImage = (width*bpp+31)/32*4*height;  bmpinfo.biXPelsPerMeter = 100;  bmpinfo.biYPelsPerMeter = 100;  bmpinfo.biClrUsed = 0;  bmpinfo.biClrImportant = 0;  fwrite(&bmpheader, sizeof(bmpheader), 1, fp);  fwrite(&bmpinfo, sizeof(bmpinfo), 1, fp);  fwrite(data, size, 1, fp);  fclose(fp);  }  int main(int argc,char *argv){HWND dtHwnd = GetDesktopWindow();HDC dtHdc = GetDC(dtHwnd);int dtWidth = GetSystemMetrics(SM_CXSCREEN);int dtHeight = GetSystemMetrics(SM_CYSCREEN);HDC dtHdcBuf = CreateCompatibleDC(NULL);HBITMAP hBitmap = CreateCompatibleBitmap(dtHdc,dtWidth,dtHeight);SelectObject(dtHdcBuf, hBitmap);BitBlt(dtHdcBuf, 0, 0, dtWidth, dtHeight, dtHdc, 0, 0, SRCCOPY);int bitSize = dtWidth*dtHeight*4;BYTE *bit = new BYTE[bitSize];LONG re = GetBitmapBits(hBitmap, bitSize, bit);if(bit && re){save_bgrdata_to_bmp(bit, bitSize, dtWidth, dtHeight,"gdi.bmp",32);free(bit);}DeleteObject(hBitmap);DeleteDC(dtHdcBuf);ReleaseDC(dtHwnd,dtHdc);return 1;}

gdi_bmp.cpp

windows gdi儲存bmp