public static void Render(
this DrawingContext cx,
DrawingRenderInfo drawing)
{
var pop_count = 0;
if (drawing.Transform != null)
{
cx.PushTransform(drawing.Transform);
pop_count++;
}
if (drawing.Opacity != null)
{
cx.PushOpacity(drawing.Opacity.Value);
pop_count++;
}
if (drawing.Clip != null)
{
cx.PushClip(drawing.Clip);
pop_count++;
}
cx.DrawDrawing(drawing.Drawing);
while (pop_count-- > 0)
cx.Pop();
}
public WpfDrawingContextDrawCommand(Action<IPixelCanvas, DrawingContext, CancellationToken> drawAction)
{
this.DrawAction = drawAction;
return;
Processing = Task.Run(() =>
{
var sw = Stopwatch.StartNew();
var dv = new DrawingVisual();
using (var cx = dv.RenderOpen())
{
Draw(null, cx, CancellationToken.None);
}
var dr = dv.Drawing;
dr.Freeze();
var di = new DrawingRenderInfo();
di.Drawing = dr;
sw.Stop();
Debug.WriteLine("drawing single " + sw.Elapsed.TotalMilliseconds);
return di;
});
}
public static void Render(
this DrawingContext cx,
double drawingWidth,
double drawingHeight,
DrawingRenderInfo drawing)
{
// expand drawings to desired size using transparent rectangle
var canvas = new RectangleGeometry(new Rect(0, 0, drawingWidth, drawingHeight));
canvas.Freeze();
cx.DrawGeometry(Brushes.Transparent, null, canvas);
cx.Render(drawing);
}
public static void Render(
this DrawingContext cx,
int x,
int y,
int width,
int height,
Action<DrawingContext> prepareDrawingContext,
DrawingRenderInfo drawing)
{
if (prepareDrawingContext != null)
prepareDrawingContext(cx);
cx.Render(width, height, drawing);
}
IEnumerable<DrawingRenderInfo> produceSquares(int count, int square_size, int canvas_size)
{
Random rd = new Random();
for(int i = 0; i < count; i++)
{
var di = new DrawingRenderInfo();
di.Transform = new TranslateTransform(rd.Next(0, canvas_size - square_size), rd.Next(0, canvas_size - square_size));
di.Transform.Freeze();
var geom = new RectangleGeometry(new Rect(0, 0, square_size, square_size));
geom.Freeze();
di.Drawing = new GeometryDrawing(Brushes.Red, null, geom);
di.Drawing.Freeze();
yield return di;
}
}
public static void DrawDrawing(
this IPixelCanvas pc,
int x,
int y,
int width,
int height,
BlendMode blendMode,
Action<DrawingContext> prepareDrawingContext,
DrawingRenderInfo drawing)
{
var dv = new DrawingVisual();
using (var cx = dv.RenderOpen())
{
if (prepareDrawingContext != null)
prepareDrawingContext(cx);
cx.Render(width, height, drawing);
}
pc.DrawVisual(0, 0, dv, blendMode);
}
