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53 行
1.7 KiB

using System;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.ui;
namespace Unity.UIWidgets.painting {
public abstract class ClipContext {
public abstract Canvas canvas { get; }
void _clipAndPaint(Action<bool> canvasClipCall, Clip clipBehavior, Rect bounds, Action painter) {
D.assert(canvasClipCall != null);
this.canvas.save();
switch (clipBehavior) {
case Clip.none:
break;
case Clip.hardEdge:
canvasClipCall(false);
break;
case Clip.antiAlias:
canvasClipCall(true);
break;
case Clip.antiAliasWithSaveLayer:
canvasClipCall(true);
this.canvas.saveLayer(bounds, new Paint());
break;
}
painter();
if (clipBehavior == Clip.antiAliasWithSaveLayer) {
this.canvas.restore();
}
this.canvas.restore();
}
public void clipPathAndPaint(Path path, Clip clipBehavior, Rect bounds, Action painter) {
this._clipAndPaint((bool doAntiAias) => this.canvas.clipPath(path),
clipBehavior, bounds, painter);
}
public void clipRRectAndPaint(RRect rrect, Clip clipBehavior, Rect bounds, Action painter) {
this._clipAndPaint(doAntiAias => this.canvas.clipRRect(rrect),
clipBehavior, bounds, painter);
}
public void clipRectAndPaint(Rect rect, Clip clipBehavior, Rect bounds, Action painter) {
this._clipAndPaint(doAntiAias => this.canvas.clipRect(rect),
clipBehavior, bounds, painter);
}
}
}