public void OnRender(IVisual visual, double width, double height, DrawingContext drawingContext)
{
if (visual.NativeVisual is DrawingGroup drawingGroup)
{
drawingContext.DrawDrawing(drawingGroup);
}
else
{
if (!IsPositive(width) || !IsPositive(height))
{
return;
}
double scaleX = 1.0;
double scaleY = 1.0;
// TODO: Put this back once fix NRE
#if false
Matrix m = PresentationSource.FromVisual(this).CompositionTarget.TransformToDevice;
scaleX = m.M11;
scaleY = m.M22;
widthInPixels = width * m.M11;
heightInPixels = height * m.M22;
#endif
int widthInPixels = (int)(width * scaleX);
int heightInPixels = (int)(height * scaleY);
// reset the bitmap if the size has changed
if (_bitmap == null || widthInPixels != _bitmap.PixelWidth || heightInPixels != _bitmap.PixelHeight)
{
_bitmap = new WriteableBitmap(widthInPixels, heightInPixels, 96 * scaleX, 96 * scaleY, PixelFormats.Pbgra32, null);
}
// draw on the bitmap
_bitmap.Lock();
IVisualEnvironment visualEnvironment = StandardUIEnvironment.VisualEnvironment;
visualEnvironment.RenderToBuffer(visual, _bitmap.BackBuffer, widthInPixels, heightInPixels, _bitmap.BackBufferStride);
_bitmap.AddDirtyRect(new Int32Rect(0, 0, widthInPixels, heightInPixels));
_bitmap.Unlock();
drawingContext.DrawImage(_bitmap, new Windows.Foundation.Rect(0, 0, widthInPixels, heightInPixels));
//var rect = new Windows.Foundation.Rect(0, 0, 175, 50);
//drawingContext.DrawRectangle(new SolidColorBrush(global::Windows.UI.Colors.Red), null, rect);
}
/*
* SolidColorBrush mySolidColorBrush = new SolidColorBrush();
* mySolidColorBrush.Color = Colors.LimeGreen;
* Pen myPen = new Pen(Brushes.Blue, 10);
* Rect myRect = new Rect(0, 0, 500, 500);
* dc.DrawRectangle(mySolidColorBrush, myPen, myRect);
*/
}
public WinUIStandardUIEnvironment(IVisualEnvironment visualEnvironment)
{
_visualEnvironment = visualEnvironment;
}
public static void Init(IVisualEnvironment visualEnvironment)
{
StandardUIEnvironment.Init(new WinUIStandardUIEnvironment(visualEnvironment));
}
public MacStandardUIEnvironment(IVisualEnvironment visualEnvironment)
{
_visualEnvironment = visualEnvironment;
}
