解決策を探している人は誰でも、DirectX 11 を使用してカスタムの winforms コントロールを作成し、高度に最適化されたコピーをグラフィックス メモリに格納し、そのコントロールを でホストしましたWinformsHost
。興味のある人にコードを提供できます。
GPU メモリへの最適化されたコピー
// Using native memcpy for the fastest possible copy
[DllImport("msvcrt.dll", EntryPoint = "memcpy", CallingConvention = CallingConvention.Cdecl, SetLastError = false)]
private static extern IntPtr memcpy(IntPtr dest, IntPtr src, UIntPtr count);
/// <summary>
/// Copies a bitmap to gpu memory
/// </summary>
/// <param name="frame">The image to copy to the gpu</param>
/// <returns>A texture in gpu memory for the bitmap</returns>
public Texture2D CopyFrameToGpuMemory(Bitmap frame)
{
SampleDescription sampleDesc = new SampleDescription();
sampleDesc.Count = 1;
sampleDesc.Quality = 0;
Texture2DDescription texDesc = new Texture2DDescription()
{
ArraySize = 1,
MipLevels = 1,
SampleDescription = sampleDesc,
Format = Format.B8G8R8A8_UNorm,
CpuAccessFlags = CpuAccessFlags.Write,
BindFlags = BindFlags.ShaderResource,
Usage = ResourceUsage.Dynamic,
Height = frame.Height,
Width = frame.Width
};
Texture2D tex = new Texture2D(Device, texDesc);
Surface surface = tex.AsSurface();
DataRectangle mappedRect = surface.Map(SlimDX.DXGI.MapFlags.Write | SlimDX.DXGI.MapFlags.Discard);
BitmapData pixelData = frame.LockBits(new Rectangle(0, 0, frame.Width, frame.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppRgb);
unsafe //!!!
{
byte* pixelDataStart = (byte*)pixelData.Scan0.ToPointer();
byte* mappedRectDataStart = (byte*)mappedRect.Data.DataPointer.ToPointer();
for (int y = 0; y < texDesc.Height; y++)
{
byte* lineLocationDest = mappedRectDataStart + (y * mappedRect.Pitch);
byte* lineLocationSrc = pixelDataStart + (y * pixelData.Stride);
// Copy line by line for best performance
memcpy((IntPtr)lineLocationDest, (IntPtr)lineLocationSrc, (UIntPtr)(texDesc.Width * 4));
}
} //!!!
frame.UnlockBits(pixelData);
mappedRect.Data.Dispose();
surface.Unmap();
surface.Dispose();
return tex;
}