Question

我正在尝试创建一个应用程序，我在其中创建一个Bitmap，然后从中取出一些变量并从中创建一个Texture2D。这就是我所拥有的：

public Bitmap getBitmap()
        {
            if (!panelVideoPreview.IsDisposed)
            {
                Bitmap b = new Bitmap(panelVideoPreview.Width, panelVideoPreview.Height, PixelFormat.Format32bppRgb);
                Graphics g = Graphics.FromImage(b);
                Rectangle videoRect = panelVideoPreview.Bounds;
                panelVideoPreview.DrawToBitmap(b, videoRect);
                b.Dispose();
                return b;
            }
            else
            {
                Bitmap b = new Bitmap(panelVideoPreview.Width, panelVideoPreview.Height);
                return b;
            }
        }

然后我尝试从中创建一个纹理：

        Texture2D tex = new Texture2D(gDevice, (int)bit.Width, (int)bit.Height);

这是我收到错误的地方，我明白了：

System.ArgumentException未处理消息=参数无效。来源= System.Drawing中堆栈跟踪：在System.Drawing.Image.get_Width（） at GPUParticles.VelocityTexture.createVelocityMapBitmap（GraphicsDevice gDevice，Bitmap bit，Single Accuracy）在D：\ Dropbox \ School \ Project FUN \ Code \ XNA \ GPUParticles \ GPUParticles \ GPUParticles \ VelocityTexture.cs：第16行在D：\ Dropbox \ School \ Project FUN \ Code \ XNA \ GPUParticles \ GPUParticles \ GPUParticles \ Game1.cs中的GPUParticles.Game1.camInterval_Tick（Object myObject，EventArgs myEventArgs）：第302行在System.Windows.Forms.Timer.OnTick（EventArgs e）在System.Windows.Forms.Timer.TimerNativeWindow.WndProc（Message＆amp; m）在System.Windows.Forms.NativeWindow.DebuggableCallback（IntPtr hWnd，Int32 msg，IntPtr wparam，IntPtr lparam）在System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW（MSG＆amp; msg）在System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop（IntPtr dwComponentID，Int32 reason，Int32 pvLoopData）在System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner（Int32 reason，ApplicationContext context）在System.Windows.Forms.Application.ThreadContext.RunMessageLoop（Int32 reason，ApplicationContext context）在System.Windows.Forms.Application.Run（Form mainForm）在Microsoft.Xna.Framework.WindowsGameHost.Run（）在Microsoft.Xna.Framework.Game.RunGame（Boolean useBlockingRun）在Microsoft.Xna.Framework.Game.Run（）在D：\ Dropbox \ School \ Project FUN \ Code \ XNA \ GPUParticles \ GPUParticles \ GPUParticles \ Program.cs中的GPUParticles.Program.Main（String [] args）：第15行 InnerException：

Answer 1

您可以使用MemoryStream。示例（未经测试）：

Texture2D MakeTextureFromBitmap(Bitmap bmp) {
    using (var ms = new MemoryStream()) {
        bmp.Save(ms, ImageFormat.Png);
        return Texture2D.FromStream(GraphicsDevice, ms);
    }
}

如何在C＃XNA中访问位图的宽度和高度？

1 个答案: