[iOS & Mac] Fix image tile misalignment in GraphicsView ImagePaint

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue16767_Resize.cs

@@ -13,15 +13,13 @@ public Issue16767_Resize(TestDevice testDevice) : base(testDevice)
 	public override string Issue => "Resize function in W2DImage class";
 	protected override bool ResetAfterEachTest => true;
 
-#if TEST_FAILS_ON_IOS //Issue Link - https://github.com/dotnet/maui/issues/34755
 	[Test]
 	[Category(UITestCategories.GraphicsView)]
 	public void ImagePaintWithResizeModeFit()
 	{
 		App.WaitForElement("ResizeModeFit");
 		VerifyScreenshot();
 	}
-#endif
 
 	[Test]
 	[Category(UITestCategories.GraphicsView)]

src/Graphics/src/Graphics/Platforms/MaciOS/PlatformCanvas.cs

@@ -708,6 +708,10 @@ public override void FillRectangle(float x, float y, float width, float height)
 		private void FillWithPattern(nfloat x, nfloat y, Action drawingAction)
 		{
 			_context.SaveState();
+
+			// Reset the pattern phase so the pattern starts at the correct origin.
+			_context.SetPatternPhase(CGSize.Empty);
+
 			var colorspace = CGColorSpace.CreatePattern(null);
 			_context.SetFillColorSpace(colorspace);
 
@@ -741,6 +745,12 @@ private void FillWithPattern(nfloat x, nfloat y, Action drawingAction)
 		private void FillWithImage(nfloat x, nfloat y, Action drawingAction)
 		{
 			_context.SaveState();
+
+			// The view's PatternPhase is pre-set by PlatformGraphicsView,
+			// which shifts the image tile and causes it to split across the fill rect.
+			// Reset it here to the fill rect origin so the image starts at the right place.
+			_context.SetPatternPhase(CGSize.Empty);
+
 			var baseColorspace = _getColorspace?.Invoke();
 			var colorspace = CGColorSpace.CreatePattern(baseColorspace);
 			_context.SetFillColorSpace(colorspace);