private void DetectImageFormat()
{
_formatDetected = false;
if (!_dataAvailable)
{
return;
}
_surfaceDesc =
(NativeMethods.DDSURFACEDESC2)
Marshal.PtrToStructure(new IntPtr(_lpStartAddress.ToInt64() + 4), typeof(NativeMethods.DDSURFACEDESC2));
switch (_surfaceDesc.ddpfPixelFormat.dwRGBBitCount)
{
case 16:
_format = PixelFormat.Format16bppRgb555;
break;
case 24:
_format = PixelFormat.Format24bppRgb;
break;
case 32:
_format = PixelFormat.Format32bppRgb;
break;
}
if (_format != PixelFormat.Undefined)
{
_formatDetected = true;
}
}
private void CloseSM()
{
if (_hFileMappingObject.Equals(IntPtr.Zero))
{
return;
}
NativeMethods.UnmapViewOfFile(_lpStartAddress);
NativeMethods.CloseHandle(_hFileMappingObject);
_dataAvailable = false;
_format = PixelFormat.Undefined;
_formatDetected = false;
_hFileMappingObject = IntPtr.Zero;
_lpStartAddress = IntPtr.Zero;
_surfaceDesc = new NativeMethods.DDSURFACEDESC2();
}
private ImageBrush CreateImageBrush()
{
ImageBrush brush = null;
if (_display.TextureMemory.IsDataAvailable)
{
NativeMethods.DDSURFACEDESC2 surfaceDesc = (NativeMethods.DDSURFACEDESC2)_display.TextureMemory.MarshalTo(typeof(NativeMethods.DDSURFACEDESC2), 4);
PixelFormat format = PixelFormats.Bgr32; //.Format32bppRgb;
switch (surfaceDesc.ddpfPixelFormat.dwRGBBitCount)
{
case 16:
format = PixelFormats.Bgr555; // PixelFormat.Format16bppRgb555;
break;
case 24:
format = PixelFormats.Bgr24; // PixelFormat.Format24bppRgb;
break;
case 32:
format = PixelFormats.Bgr32; // PixelFormat.Format32bppRgb;
break;
}
int offset = (surfaceDesc.lPitch * (int)_display.TextureRect.Y) + ((int)_display.TextureRect.X * (surfaceDesc.ddpfPixelFormat.dwRGBBitCount / 8));
BitmapSource image = BitmapSource.Create((int)_display.TextureRect.Width,
(int)_display.TextureRect.Height,
96,
96,
format,
null,
_display.TextureMemory.GetPointer(offset + 4 + surfaceDesc.dwSize),
surfaceDesc.lPitch * (int)_display.TextureRect.Height,
surfaceDesc.lPitch);
brush = new ImageBrush(image);
_defaultImage = new ImageBrush(image);
_defaultImage.Stretch = Stretch.Fill;
_defaultImage.TileMode = TileMode.None;
_defaultImage.Viewport = new Rect(0d, 0d, 1d, 1d);
_defaultImage.ViewportUnits = BrushMappingMode.RelativeToBoundingBox;
}
return(brush);
}
