public void SaveAsJpeg(Stream stream, int width, int height)
{
int len = Width * Height * GetFormatSize(Format);
IntPtr data = Marshal.AllocHGlobal(len);
FNA3D.FNA3D_GetTextureData2D(
GraphicsDevice.GLDevice,
texture,
0,
0,
Width,
height,
0,
data,
len
);
FNA3D.WriteJPGStream(
stream,
Width,
Height,
width,
height,
data,
100 // FIXME: What does XNA pick for quality? -flibit
);
Marshal.FreeHGlobal(data);
}
public void SaveAsPng(Stream stream, int width, int height)
{
int len = Width * Height * GetFormatSize(Format);
IntPtr data = Marshal.AllocHGlobal(len);
FNA3D.FNA3D_GetTextureData2D(
GraphicsDevice.GLDevice,
texture,
0,
0,
Width,
height,
0,
data,
len
);
FNA3D.WritePNGStream(
stream,
Width,
Height,
width,
height,
data
);
Marshal.FreeHGlobal(data);
}
public void GetData <T>(
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 = Width >> level;
subH = Height >> 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_GetTextureData2D(
GraphicsDevice.GLDevice,
texture,
subX,
subY,
subW,
subH,
level,
handle.AddrOfPinnedObject() + (startIndex * elementSizeInBytes),
elementCount * elementSizeInBytes
);
handle.Free();
}