public void Clip(IGradientMask mask, TContext context)
{
switch (mask)
{
case IEllipseMask ellipseMask:
EllipsePainter.Clip(ellipseMask, context);
break;
case IRectangleMask rectangleMask:
RectanglePainter.Clip(rectangleMask, context);
break;
case ITextMask textMask:
TextPainter.Clip(textMask, context);
break;
case IPathMask pathMask:
PathPainter.Clip(pathMask, context);
break;
case IMaskCollection maskCollection:
ClipCollection(maskCollection, context);
break;
}
}
protected internal void ClipRoundRect(SKRoundRect roundRect, IGradientMask mask, DrawContext context)
{
using var canvasLock = new CanvasLock(context.Canvas);
LayoutBounds(mask, roundRect.Rect, context, false);
context.Canvas.ClipRoundRect(roundRect, mask.ClipMode.ToSkOperation(), true);
}
protected override void BeginLayout(IGradientMask mask, SKRect bounds, DrawContext context)
{
var textMask = (ITextMask)mask;
var posX = textMask.HorizontalTextAlignment switch
{
TextAlignment.Center => (float)context.RenderRect.Width / 2,
TextAlignment.End => context.RenderRect.Width,
_ => 0
};
var posY = textMask.VerticalTextAlignment switch
{
TextAlignment.Center => (float)context.RenderRect.Height / 2,
TextAlignment.End => context.RenderRect.Height,
_ => 0
};
context.Canvas.Translate(posX, posY);
}
protected void LayoutBounds(IGradientMask mask, SKRect bounds, DrawContext context, bool keepAspectRatio)
{
BeginLayout(mask, bounds, context);
if (mask.Stretch == Stretch.None)
{
var scaleX = (float)context.RenderRect.Width / context.CanvasRect.Width;
var scaleY = (float)context.RenderRect.Height / context.CanvasRect.Height;
if (keepAspectRatio)
{
context.Canvas.Scale(Math.Max(scaleX, scaleY));
}
else
{
context.Canvas.Scale(scaleX, scaleY);
}
}
else
{
var scaleX = context.RenderRect.Width / bounds.Width;
var scaleY = context.RenderRect.Height / bounds.Height;
if (mask.Stretch == Stretch.AspectFit)
{
context.Canvas.Scale(Math.Min(scaleX, scaleY));
}
if (mask.Stretch == Stretch.AspectFill)
{
context.Canvas.Scale(Math.Max(scaleX, scaleY));
}
if (mask.Stretch == Stretch.Fill)
{
context.Canvas.Scale(scaleX, scaleY);
}
}
EndLayout(mask, bounds, context);
}
protected override void EndLayout(IGradientMask mask, SKRect bounds, DrawContext context)
{
var textMask = (ITextMask)mask;
var movX = textMask.HorizontalTextAlignment switch
{
TextAlignment.Center => - bounds.MidX,
TextAlignment.End => - bounds.Right,
_ => - bounds.Left
};
var movY = textMask.VerticalTextAlignment switch
{
TextAlignment.Center => - bounds.MidY,
TextAlignment.End => - bounds.Bottom,
_ => - bounds.Top
};
context.Canvas.Translate(movX, movY);
}
}
}
protected virtual void EndLayout(IGradientMask mask, SKRect bounds, DrawContext context)
{
context.Canvas.Translate(-bounds.MidX, -bounds.MidY);
}
protected virtual void BeginLayout(IGradientMask mask, SKRect bounds, DrawContext context)
{
context.Canvas.Translate((float)context.RenderRect.Width / 2, (float)context.RenderRect.Height / 2);
}
public static T Mask <T>(this T control, IGradientMask mask) where T : IGradientControl
{
control.Mask = mask;
return(control);
}
