public IDrawingTarget BeginDraw(Color?clearColor)
{
#if NETFX_CORE
var surface = _texture.QueryInterface <Surface>();
#else
var surface = _texture.AsSurface();
#endif
var rtProperties = new RenderTargetProperties
{
DpiX = 96,
DpiY = 96,
Type = RenderTargetType.Default,
PixelFormat = new PixelFormat(Format.Unknown, AlphaMode.Premultiplied)
};
var renderTarget = new RenderTarget(_factory, surface, rtProperties);
renderTarget.BeginDraw();
// required to clear the render target
// (not required on all machines, MacBook Air + Win7 seems to recycle old textures)
renderTarget.Clear(clearColor != null ? clearColor.Value.import() : (Color4?)null);
var state = new DrawingState();
var transform = new DrawingTransform();
var drawingTarget = new DrawingTarget(state, transform, renderTarget, _width, _height);
var target = new DrawingTargetSplitter(
_backend,
state,
transform,
drawingTarget,
drawingTarget,
drawingTarget,
drawingTarget,
drawingTarget,
() =>
{
drawingTarget.Dispose();
renderTarget.EndDraw();
renderTarget.Dispose();
surface.Dispose();
});
var pixelAligner = PixelAligningDrawingTarget.Create(target, target.Dispose, state, transform);
return(pixelAligner);
}
public DrawingTarget(DrawingState state, DrawingTransform transform, RenderTarget target, int width, int height)
{
_state = state;
_transform = transform;
_target = target;
_target.AntialiasMode = AntialiasMode.PerPrimitive;
Width = width;
Height = height;
_strokeBrush = new BrushCache(createBrush, () => _state.StrokeColor);
_fillBrush = new BrushCache(createBrush, () => state.FillColor);
_textBrush = new BrushCache(createBrush, () => state.TextColor);
_transform.Changed += transformChanged;
}