/**
Create a drawing target from an already existing RenderTarget.
Note that the RenderTarget must use the the same Factory the
drawing backend does.
**/
public IDrawingTarget CreateDrawingTarget(RenderTarget renderTarget)
{
var width = renderTarget.Size.Width;
var height = renderTarget.Size.Height;
var state = new DrawingState();
var transform = new DrawingTransform();
var drawingTarget = new DrawingTarget(state, transform, renderTarget, (int)Math.Floor(width), (int)Math.Floor(height));
var target = new DrawingTargetSplitter(
this,
state,
transform,
drawingTarget,
drawingTarget,
drawingTarget,
drawingTarget,
drawingTarget,
() =>
{
drawingTarget.Dispose();
});
var pixelAligner = PixelAligningDrawingTarget.Create(target, target.Dispose, state, transform);
return pixelAligner;
}
PixelAligningDrawingTarget(IDrawingTarget target, DrawingState state, DrawingTransform transform)
{
_target = target;
_state = state;
_transform = transform;
_transform.Changed += transformChanged;
transformChanged();
}
PixelAligningDrawingTarget(IDrawingTarget target, DrawingState state, DrawingTransform transform)
{
_target = target;
_state = state;
_transform = transform;
_transform.Changed += transformChanged;
transformChanged();
}
// Fill bounds of a stroke aligned rect that gets drawed stroke + filled
public static Bounds StrokeFillBounds(this DrawingState state, Rectangle r)
{
if (!state.StrokeEnabled)
{
return(new Bounds(r.X, r.Y, r.Right, r.Bottom));
}
var fs = StrokeFillShift(state);
return(new Bounds(r.X + fs, r.Y + fs, r.Right - fs, r.Bottom - fs));
}
public void RestoreState()
{
var p = _previous_;
if (p == null)
{
throw new Exception("No Previous State found");
}
Copy(p, this);
_previous_ = p._previous_;
}
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;
}
public static double StrokeFillShift(this DrawingState state)
{
var width = state.StrokeWeight;
switch (state.StrokeAlignment)
{
case StrokeAlignment.Center:
return(width / 2);
case StrokeAlignment.Inside:
return(width);
case StrokeAlignment.Outside:
return(0);
}
Debug.Assert(false);
return(0);
}
public static IDrawingTarget Create(IDrawingTarget target, Action disposer, DrawingState state, DrawingTransform transform)
{
var pixelAligner = new PixelAligningDrawingTarget(target, state, transform);
return(new DrawingTargetSplitter
(
target.Backend,
state,
transform,
pixelAligner,
pixelAligner,
target,
target,
target, () =>
{
pixelAligner.Dispose();
disposer();
}
));
}
public static IDrawingTarget Create(IDrawingTarget target, Action disposer, DrawingState state, DrawingTransform transform)
{
var pixelAligner = new PixelAligningDrawingTarget(target, state, transform);
return new DrawingTargetSplitter
(
target.Backend,
state,
transform,
pixelAligner,
pixelAligner,
target,
target,
target, () =>
{
pixelAligner.Dispose();
disposer();
}
);
}
public static void Copy(DrawingState @from, DrawingState to)
{
to.FillEnabled = @from.FillEnabled;
to.FillColor = @from.FillColor;
to.StrokeEnabled = @from.StrokeEnabled;
to.StrokeWeight = @from.StrokeWeight;
to.StrokeAlignment = @from.StrokeAlignment;
to.FontName = @from.FontName;
to.FontWeight = @from.FontWeight;
to.FontStyle = @from.FontStyle;
to.TextSize = @from.TextSize;
to.TextColor = @from.TextColor;
to.TextAlignment = @from.TextAlignment;
to.ParagraphAlignment = @from.ParagraphAlignment;
to.WordWrapping = @from.WordWrapping;
to.PixelAligned = @from.PixelAligned;
}
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, seems to be a driver decision.
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 void RestoreState()
{
var p = _previous_;
if (p == null)
throw new Exception("No Previous State found");
Copy(p, this);
_previous_ = p._previous_;
}
public static void Copy(DrawingState @from, DrawingState to)
{
to.FillEnabled = @from.FillEnabled;
to.FillColor = @from.FillColor;
to.StrokeEnabled = @from.StrokeEnabled;
to.StrokeWeight = @from.StrokeWeight;
to.StrokeAlignment = @from.StrokeAlignment;
to.FontName = @from.FontName;
to.FontWeight = @from.FontWeight;
to.FontStyle = @from.FontStyle;
to.TextSize = @from.TextSize;
to.TextColor = @from.TextColor;
to.TextAlignment = @from.TextAlignment;
to.ParagraphAlignment = @from.ParagraphAlignment;
to.WordWrapping = @from.WordWrapping;
to.PixelAligned = @from.PixelAligned;
}
public static Bounds StrokeAlignedBounds(this DrawingState state, Rectangle rectangle)
{
var strokeShift = StrokeAlignShift(state);
return(new Bounds(rectangle.X + strokeShift, rectangle.Y + strokeShift, rectangle.Right - strokeShift, rectangle.Bottom - strokeShift));
}
public void SaveState()
{
var clone = Clone();
_previous_ = clone;
}
public void SaveState()
{
var clone = Clone();
_previous_ = clone;
}
public BoundsTracker(DrawingState state, DrawingTransform transform)
{
State = state;
Transform = transform;
}
public BoundsTracker(DrawingState state, DrawingTransform transform)
{
State = state;
Transform = transform;
}
