MFC中用GDI+动态显示图片的例子

最新推荐文章于 2019-12-11 21:40:18 发布

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最新推荐文章于 2019-12-11 21:40:18 发布

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文章标签： gdi+ mfc image

本文链接：https://blog.youkuaiyun.com/aqaya/article/details/8086732

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szPath为图片的绝对路径

void DrawImageEx(CDC* pDC, CRect& rect, LPCTSTR szPath)
{
Graphics gc(pDC->GetSafeHdc());

ImageAttributes ImgAtt;
ImgAtt.SetWrapMode(WrapModeTileFlipXY);

Image image(szPath, FALSE);

double nImageWidth = image.GetWidth();
double nImageHeight = image.GetHeight();
double nWidth = 0.0, nHeight = 0.0;
double fDeltaX = rect.Width() / nImageWidth;
double fDeltaY = rect.Height() / nImageHeight;
if(fDeltaX > fDeltaY){
  nWidth =nImageWidth * fDeltaY;
  nHeight = nImageHeight * fDeltaY;
}else{
  nWidth = nImageWidth * fDeltaX;
  nHeight = nImageHeight * fDeltaX;
}

Rect rtImage;
rtImage.X = rect.left+(rect.Width()/2-nWidth/2);
rtImage.Y = rect.top+(rect.Height()/2-nHeight/2);
rtImage.Width = nWidth;
rtImage.Height = nHeight;
gc.DrawImage(&image, rtImage,0,0,image.GetWidth(),image.GetHeight(),UnitPixel,&ImgAtt);
}