public void GetData <T>(
CubeMapFace cubeMapFace,
int level,
Rectangle?rect,
T[] data,
int startIndex,
int elementCount
) where T : struct
{
if (data == null || data.Length == 0)
{
throw new ArgumentException("data cannot be null");
}
if (data.Length < startIndex + elementCount)
{
throw new ArgumentException(
"The data passed has a length of " + data.Length.ToString() +
" but " + elementCount.ToString() + " pixels have been requested."
);
}
int subX, subY, subW, subH;
if (rect == null)
{
subX = 0;
subY = 0;
subW = Size >> level;
subH = Size >> level;
}
else
{
subX = rect.Value.X;
subY = rect.Value.Y;
subW = rect.Value.Width;
subH = rect.Value.Height;
}
int elementSizeInBytes = Marshal.SizeOf(typeof(T));
ValidateGetDataFormat(Format, elementSizeInBytes);
GCHandle handle = GCHandle.Alloc(data, GCHandleType.Pinned);
FNA3D.FNA3D_GetTextureDataCube(
GraphicsDevice.GLDevice,
texture,
subX,
subY,
subW,
subH,
cubeMapFace,
level,
handle.AddrOfPinnedObject() + (startIndex * elementSizeInBytes),
elementCount * elementSizeInBytes
);
handle.Free();
}