Apply Alignments to TileBrushes with uniform stretch (#15846)

* add tiled brush alignment cross tests

* apply Alignments to TileBrushes with uniform stretch

src/Skia/Avalonia.Skia/DrawingContextImpl.cs

@@ -1168,10 +1168,12 @@ private void ConfigureSceneBrushContentWithPicture(ref PaintWrapper paintWrapper
 
  brushTransform *= Matrix.CreateTranslation(-sourceRect.Position);
 
+ var scale = Vector.One;
+
  if (sourceRect.Size != destinationRect.Size)
  {
  //scale source to destination size
- var scale = tileBrush.Stretch.CalculateScaling(destinationRect.Size, sourceRect.Size);
+ scale = tileBrush.Stretch.CalculateScaling(destinationRect.Size, sourceRect.Size);
 
  var scaleTransform = Matrix.CreateScale(scale);
 
@@ -1197,11 +1199,11 @@ private void ConfigureSceneBrushContentWithPicture(ref PaintWrapper paintWrapper
  }
  }
 
- if (tileBrush.Stretch == Stretch.None && transform == Matrix.Identity)
+ if (tileBrush.Stretch != Stretch.Fill && transform == Matrix.Identity)
  {
  //align content
  var alignmentOffset = TileBrushCalculator.CalculateTranslate(tileBrush.AlignmentX, tileBrush.AlignmentY,
- contentBounds, destinationRect, Vector.One);
+ contentBounds, destinationRect, tileBrush.Stretch == Stretch.None ? Vector.One : scale);
 
  brushTransform *= Matrix.CreateTranslation(alignmentOffset);
  }

tests/Avalonia.RenderTests/CrossTests/Brushes/CrossTileBrushTests.cs

@@ -78,6 +78,36 @@ public void Should_Render_Scaled_TileBrush()
 
  }
 
+ [CrossFact]
+ public void Should_Render_Aligned_TileBrush()
+ {
+ var brush = new CrossDrawingBrush
+ {
+ TileMode = TileMode.Tile,
+ AlignmentX = AlignmentX.Center,
+ AlignmentY = AlignmentY.Center,
+ Stretch = Stretch.Uniform,
+ Drawing = new CrossDrawingGroup()
+ {
+ Children = new List<CrossDrawing>()
+ {
+ new CrossGeometryDrawing(new CrossRectangleGeometry(new(0, 0, 100, 150)))
+ {
+ Brush = new CrossSolidColorBrush(Colors.Crimson)
+ },
+ }
+ }
+ };
+
+ RenderAndCompare(new CrossControl()
+ {
+ Width = 100,
+ Height = 100,
+ Background = brush
+ });
+
+ }
+
  [CrossFact]
  public void Should_Render_With_Transform()
  {