public void Render()
{
// Note: there ought to be a more efficient way to do this, as this is
// critical. However, after much searching, the only way I found to
// convert a Wic bitmap to a BitmapImage was by serializing to/from
// a memory stream.
if (!isRendering &&
GraphicsHandler != null &&
GraphicsHandler.Control != null)
{
isRendering = true;
GraphicsHandler.BeginDrawing();
Callback.OnPaint(Widget, new PaintEventArgs(graphics, Widget.Bounds)); // renders into the bitmap
GraphicsHandler.EndDrawing();
var bitmap = GraphicsHandler.Image;
if (bitmap != null)
{
var bitmapHandler = bitmap.Handler as BitmapHandler;
var bitmapObject = bitmapHandler.Control;
var size = bitmapObject.Size;
var writeableBitmap = new WriteableBitmap(size.Width, size.Height);
// Get a pointer to the bitmap pixels
unsafe
{
byte *ptr = null;
((IBufferByteAccess)writeableBitmap.PixelBuffer).Buffer(out ptr);
var len = size.Width * size.Height;
var pixels = new SharpDX.ColorBGRA[len];
fixed(SharpDX.ColorBGRA *pixelsPtr = &pixels[0])
{
bitmapObject.CopyPixels(pixels);
CopyMemory((IntPtr)ptr, (IntPtr)pixelsPtr, (uint)len * 4);
}
}
Control.Source = writeableBitmap;
}
isRendering = false;
}
}
