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以下代码行为非常奇怪。它在图像底部添加了一些额外的间距,我看不出为什么。码结果:c#图片大小调整添加额外的像素
这是我一起工作的代码:
public static Image ReDraw(this Image main, int w, int h,
CompositingQuality quality = CompositingQuality.Default, //linear?
SmoothingMode smoothing_mode = SmoothingMode.None,
InterpolationMode ip_mode = InterpolationMode.NearestNeighbor)
{
//size
double dbl = (double)main.Width/(double)main.Height;
//preserve size ratio
if ((int)((double)h * dbl) <= w)
w = (int)((double)h * dbl);
else
h = (int)((double)w/dbl);
//draw
Image newImage = new System.Drawing.Bitmap(w, h);
Graphics thumbGraph = Graphics.FromImage(newImage);
thumbGraph.CompositingQuality = quality;
thumbGraph.SmoothingMode = smoothing_mode;
thumbGraph.InterpolationMode = ip_mode;
thumbGraph.Clear(Color.Transparent);
thumbGraph.DrawImage(main, 0, 0, w, h);
thumbGraph.DrawImage(main,
new System.Drawing.Rectangle(0, 0, w, h),
new System.Drawing.Rectangle(0, 0, main.Width, main.Height),
System.Drawing.GraphicsUnit.Pixel);
return newImage;
}
尝试一些现有的库? –
不是一种选择,这似乎太简单了,无法开始向便携式应用程序添加库 –
您是**重新创建轮子**? –