WPF部分图像显示

Question

I need some tips for a little project. i am NOT trying to make a game of some sort, but i probably need some game-making techniques.

I have to make a minimap viewer in wpf.

I have a set of map jpg files, but i only have to show a portion of them in a smaller rectangle that i draw on the app window.

The goal is to make a minimap like in most games where you can only see a set portion of the whole map.

I am fairly new in the C# wpf environment so please be specific and if you give some code please explain what is not obvious.

Thank you all.

Answer 1

If you have an Image you can crop it like this:

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;
}