PrintScreen 源代码/模拟

发布于 2024-12-02 19:49:57 字数 776 浏览 7 评论 0原文

我想拍摄一张全屏 direct3D 游戏的照片。我知道我需要创建一个“覆盖”，这在 c# 中更难，并且我发现使用 printscreen （而不是将其粘贴到 mspaint 中）确实捕获了游戏窗口。

我最终得到了这个不稳定的代码：

            try
            {
                SendKeys.SendWait("{PRTSC}");
                Thread.Sleep(100);
                if (Clipboard.ContainsImage())
                    return Clipboard.GetImage();
            }
            catch (Exception)
            {
                throw;
            }
            Bitmap bitmap = new Bitmap(1, 1);
            return bitmap;

这个代码有时可以工作，有时会抛出一个ExternalException，有时Clipboard.ContainsImage()返回false，它只是返回一个1,1大小的图像。

我想尝试改进该代码，这样我就不必依赖将某些内容复制到剪贴板所需的时间（使用 thread.sleep(20000)，它会工作，但此代码只是每 800 毫秒执行一次的较大代码）。

因此，我需要有关如何更可靠地发送密钥或获取 printscreen 使用的方法的想法。

原文

I would like to take a picture of a fullscreen direct3D game. I know I need to create an "overlay" which is harder in c# and I found out that using printscreen (and than pasting it in mspaint) does capture the game window.

I ended up with this unstable code :

            try
            {
                SendKeys.SendWait("{PRTSC}");
                Thread.Sleep(100);
                if (Clipboard.ContainsImage())
                    return Clipboard.GetImage();
            }
            catch (Exception)
            {
                throw;
            }
            Bitmap bitmap = new Bitmap(1, 1);
            return bitmap;

This code sometimes work, sometimes it throws an ExternalException and sometimes and Clipboard.ContainsImage() returns false and it simply returns a 1,1 sized image.

I would like to try and improve that code so I won't have to rely on the time it takes to copy something to the clipboard (with thread.sleep(20000), it'll work but this code is just a part of a larger code that executes every 800ms).

So I need ideas on how to send keys more reliably or get the that method printscreen uses.

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生生不灭 2024-12-09 19:49:57

public static class Win32
{
    [DllImport("User32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool PrintWindow(IntPtr hwnd, IntPtr hDC, uint nFlags);
}

public Bitmap CaptureWindow()
{
    Bitmap bmp = new Bitmap(this.Width,this.Height);
    using (Graphics g = Graphics.FromImage(bmp))
    {
        Win32.PrintWindow(this.Handle, g.GetHdc(), 0);
        g.ReleaseHdc();
    }
    return bmp;
}

public static class Win32
{
    [DllImport("User32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool PrintWindow(IntPtr hwnd, IntPtr hDC, uint nFlags);
}

public Bitmap CaptureWindow()
{
    Bitmap bmp = new Bitmap(this.Width,this.Height);
    using (Graphics g = Graphics.FromImage(bmp))
    {
        Win32.PrintWindow(this.Handle, g.GetHdc(), 0);
        g.ReleaseHdc();
    }
    return bmp;
}

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