Cropping picture, getting Rectangle from X,Y? [closed]

问题

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.

Closed 7 years ago.

I'm trying to crop a picture in C# from integer x, y coordinates.. I just can't figure out how to get it?

public void doCroppedImage(int pointX, int pointY)
{
    Rectangle cropRect = //???
}

回答1:

You can use this code. It returns the cropped image.

public static Bitmap CropImage(Image source, int x,int y,int width,int height)
{
    Rectangle crop = new Rectangle(x, y, width, height);

    var bmp = new Bitmap(crop.Width, crop.Height);
    using (var gr = Graphics.FromImage(bmp))
    {
        gr.DrawImage(source, new Rectangle(0, 0, bmp.Width, bmp.Height), crop, GraphicsUnit.Pixel);
    }
    return bmp;
} 

But one comment, to crop an image you have to know not only the x and y coordinates of cropping point but also the width and height of the cropped image.

来源：https://stackoverflow.com/questions/13217156/cropping-picture-getting-rectangle-from-x-y