c# - 在 C#（全屏游戏）中获取中间屏幕像素（颜色）？

Question

我正在运行全屏游戏，并试图找出中间像素的颜色。然而，我正在使用的代码似乎只适用于窗口应用程序/游戏/等。这是我的代码：

public static Color GetPixelColor(int x, int y) 
{
    IntPtr hdc = GetDC(IntPtr.Zero);
    uint pixel = GetPixel(hdc, x, y);
    ReleaseDC(IntPtr.Zero, hdc);
    Color color = Color.FromArgb((int)(pixel & 0x000000FF),
            (int)(pixel & 0x0000FF00) >> 8,
            (int)(pixel & 0x00FF0000) >> 16);

    return color;
} 

我得到这样的中间屏幕像素：

int ScreenWidth = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width;
int ScreenHeight = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height;

那么如何让这段代码兼容全屏游戏呢？它给了我一个 ARGB 值A = 255, R = 0, G = 0, B = 0，即使我 100% 肯定中间屏幕像素是红色的。

Answer 1

这是关于什么的：

//using System.Windows.Forms;
public static Color GetPixelColor(int x, int y) 
{
    Bitmap snapshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);

    using(Graphics gph = Graphics.FromImage(snapshot))  
    {
        gph.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
    }

    return snapshot.GetPixel(x, y);
} 

然后：

Color middleScreenPixelColor = GetPixelColor(Screen.PrimaryScreen.Bounds.Width/2, Screen.PrimaryScreen.Bounds.Height/2);