public static void GetTexture_BGRA4444 <T>(this Texture2D texture, int level, int arraySlice, Rectangle?rect, T[] data, int startIndex, int elementCount) where T : struct
{
int num = Math.Max(texture.Width >> level, 1);
int num2 = Math.Max(texture.Height >> level, 1);
Texture2DDescription description = new Texture2DDescription
{
Width = num,
Height = num2,
MipLevels = 1,
ArraySize = 1,
Format = DXGI_FORMAT_B4G4R4A4_UNORM,
BindFlags = BindFlags.None,
CpuAccessFlags = CpuAccessFlags.Read
};
description.SampleDescription.Count = 1;
description.SampleDescription.Quality = 0;
description.Usage = ResourceUsage.Staging;
description.OptionFlags = ResourceOptionFlags.None;
DeviceContext context = texture.GraphicsDevice._d3dContext();
using (SharpDX.Direct3D11.Texture2D textured = new SharpDX.Direct3D11.Texture2D(texture.GraphicsDevice._d3dDevice(), description))
{
lock (context)
{
int width;
int height;
SharpDX.DataStream stream;
int sourceSubresource = 0;
if (rect.HasValue)
{
width = rect.Value.Width;
height = rect.Value.Height;
context.CopySubresourceRegion(texture.GetTexture(), sourceSubresource, new ResourceRegion(rect.Value.Left, rect.Value.Top, 0, rect.Value.Right, rect.Value.Bottom, 1), textured, 0, 0, 0, 0);
}
else
{
width = num;
height = texture.Height;
context.CopySubresourceRegion(texture.GetTexture(), sourceSubresource, null, textured, 0, 0, 0, 0);
}
SharpDX.DataBox box = context.MapSubresource(textured, 0, MapMode.Read, MapFlags.None, out stream);
int num7 = 2 * width;
if (num7 == box.RowPitch)
{
stream.ReadRange <T>(data, startIndex, elementCount);
}
else
{
stream.Seek((long)startIndex, SeekOrigin.Begin);
int num8 = Marshal.SizeOf(typeof(T));
for (int i = 0; i < height; i++)
{
int index = (i * num7) / num8;
while (index < (((i + 1) * num7) / num8))
{
data[index] = stream.Read <T>();
index++;
}
if (index >= elementCount)
{
break;
}
stream.Seek((long)(box.RowPitch - num7), SeekOrigin.Current);
}
}
stream.Dispose();
}
}
}
