C#如何合并两个位图? [英] C# How can I merge two Bitmaps?
问题描述
我试图找到一种在Paint事件中将两个位图合并在一起的方法.我的代码如下:
I'm trying to find a way to merge two Bitmaps together in a Paint event. My code looks like this:
private void GraphicsForm_Paint(object sender, PaintEventArgs e)
{
try
{
Bitmap1 = new Bitmap(1366, 768);
Bitmap2 = new Bitmap(1366, 768);
OutputBitmap = ...//and this is where I've stuck :(
}
catch
{
}
}
问题更大,因为绘制到Bitmap2上的Graphics对象在另一个类中. 我还希望将Bitmap2绘制在OutputBitmap上的Bitmap1后面.
The problem is more problematic, because the Graphics object which draws onto Bitmap2 is in an other class. I also want Bitmap2 to be drawn behind Bitmap1 on the OutputBitmap.
谁能给我一个很好的建议,如何将这两个位图(彼此后面)合并到一个输出位图上?
Can anyone give me a good advice how to merge these two Bitmaps (behind eachother, but) onto one output bitmap?
谢谢:)
推荐答案
假设您的位图具有透明区域,请尝试创建一个位图,然后按所需顺序将另外两个位图绘制到其中:
Assuming your bitmaps have transparent areas, try creating one bitmap and draw the other two bitmaps into it in the order you want:
private Bitmap MergedBitmaps(Bitmap bmp1, Bitmap bmp2) {
Bitmap result = new Bitmap(Math.Max(bmp1.Width, bmp2.Width),
Math.Max(bmp1.Height, bmp2.Height));
using (Graphics g = Graphics.FromImage(result)) {
g.DrawImage(bmp2, Point.Empty);
g.DrawImage(bmp1, Point.Empty);
}
return result;
}
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