Update the samples

samples/Gallery/Shared/SampleBackends.cs

@@ -8,7 +8,8 @@ namespace SkiaSharpSample
 		Memory = 1 << 0,
 		OpenGL = 1 << 1,
 		Vulkan = 1 << 2,
+		Metal  = 1 << 3,
 
-		All = Memory | OpenGL | Vulkan,
+		All = Memory | OpenGL | Vulkan | Metal,
 	}
 }

samples/Gallery/Shared/Samples/BitmapDecoderSample.cs

@@ -36,8 +36,7 @@ namespace SkiaSharpSample.Samples
 				// decode the image
 				using (var bitmap = new SKBitmap(info.Width, info.Height, info.ColorType, info.IsOpaque ? SKAlphaType.Opaque : SKAlphaType.Premul))
 				{
-					IntPtr length;
-					var result = codec.GetPixels(bitmap.Info, bitmap.GetPixels(out length));
+					var result = codec.GetPixels(bitmap.Info, bitmap.GetPixels());
 					if (result == SKCodecResult.Success || result == SKCodecResult.IncompleteInput)
 					{
 						var x = 25;

samples/Gallery/Shared/Samples/BitmapScalerSample.cs

@@ -7,6 +7,7 @@ using System.Linq;
 namespace SkiaSharpSample.Samples
 {
 	[Preserve(AllMembers = true)]
+	[Obsolete]
 	public class BitmapScalerSample : SampleBase
 	{
 		private List<SKBitmapResizeMethod> methods;

samples/Gallery/Shared/Samples/BitmapSubsetDecoderSample.cs

@@ -41,9 +41,7 @@ namespace SkiaSharpSample.Samples
 				var options = new SKCodecOptions(subset);
 				using (var bitmap = new SKBitmap(subset.Width, subset.Height, info.ColorType, SKAlphaType.Premul))
 				{
-					IntPtr length;
-					int count = 0;
-					var result = codec.GetPixels(bitmap.Info, bitmap.GetPixels(out length), options, null, ref count);
+					var result = codec.GetPixels(bitmap.Info, bitmap.GetPixels(), options);
 					if (result == SKCodecResult.Success || result == SKCodecResult.IncompleteInput)
 					{
 						canvas.DrawBitmap(bitmap, info.Width + 20, subset.Top + 10);

samples/Gallery/Shared/Samples/BlurMaskFilterSample.cs

@@ -19,7 +19,7 @@ namespace SkiaSharpSample.Samples
 			canvas.DrawColor(SKColors.White);
 
 			using (var paint = new SKPaint())
-			using (var filter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 5.0f, SKBlurMaskFilterFlags.HighQuality))
+			using (var filter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 5.0f))
 			{
 				paint.IsAntialias = true;
 				paint.TextSize = 120;
@@ -41,7 +41,7 @@ namespace SkiaSharpSample.Samples
 		{
 			// create the rounded rectangle
 			var roundedRect = new SKPath();
-			roundedRect.AddRoundedRect(rect, 10, 10);
+			roundedRect.AddRoundRect(rect, 10, 10);
 
 			// draw the white background
 			var p = new SKPaint
@@ -61,13 +61,13 @@ namespace SkiaSharpSample.Samples
 				p.Color = SKColors.Black;
 				p.Style = SKPaintStyle.Stroke;
 				p.StrokeWidth = 2;
-				p.MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 2, SKBlurMaskFilterFlags.HighQuality);
+				p.MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 2);
 				canvas.Translate(0.5f, 1.5f);
 				canvas.DrawPath(roundedRect, p);
 
 				// draw the narrow blur at the top
 				p.StrokeWidth = 1;
-				p.MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 1, SKBlurMaskFilterFlags.HighQuality);
+				p.MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 1);
 				canvas.DrawPath(roundedRect, p);
 			}
 

samples/Gallery/Shared/Samples/ColorMatrixColorFilterSample.cs

@@ -94,9 +94,9 @@ namespace SkiaSharpSample.Samples
 				var w = (float)width / cols;
 				var h = (float)height / rows;
 
-				for (int y = 0; y < rows; y++)
+				for (var y = 0; y < rows; y++)
 				{
-					for (int x = 0; x < cols; x++)
+					for (var x = 0; x < cols; x++)
 					{
 						f(SKRect.Create(x * w, y * h, w, h), matices[y * cols + x]);
 					}

samples/Gallery/Shared/Samples/ColorTableColorFilterSample.cs

@@ -19,7 +19,7 @@ namespace SkiaSharpSample.Samples
 			canvas.Clear(SKColors.White);
 
 			var ct = new byte[256];
-			for (int i = 0; i < 256; ++i)
+			for (var i = 0; i < 256; ++i)
 			{
 				var x = (i - 96) * 255 / 64;
 				ct[i] = x < 0 ? (byte)0 : x > 255 ? (byte)255 : (byte)x;

samples/Gallery/Shared/Samples/CustomFontsSample.cs

@@ -18,7 +18,7 @@ namespace SkiaSharpSample.Samples
 
 		protected override void OnDrawSample(SKCanvas canvas, int width, int height)
 		{
-			string text = "\u03A3 and \u0750";
+			var text = "\u03A3 and \u0750";
 
 			canvas.Clear(SKColors.White);
 

samples/Gallery/Shared/Samples/DngDecoderSample.cs

@@ -36,8 +36,7 @@ namespace SkiaSharpSample.Samples
 				// decode the image
 				using (var bitmap = new SKBitmap(info.Width, info.Height, info.ColorType, info.IsOpaque ? SKAlphaType.Opaque : SKAlphaType.Premul))
 				{
-					IntPtr length;
-					var result = codec.GetPixels(bitmap.Info, bitmap.GetPixels(out length));
+					var result = codec.GetPixels(bitmap.Info, bitmap.GetPixels());
 					if (result == SKCodecResult.Success || result == SKCodecResult.IncompleteInput)
 					{
 						var x = 25;

samples/Gallery/Shared/Samples/FilledHeptagramSample.cs

@@ -25,7 +25,7 @@ namespace SkiaSharpSample.Samples
 			using (var path = new SKPath())
 			{
 				path.MoveTo(R, 0.0f);
-				for (int i = 1; i < 7; ++i)
+				for (var i = 1; i < 7; ++i)
 				{
 					var theta = 3f * i * TAU / 7f;
 					path.LineTo(R * (float)Math.Cos(theta), R * (float)Math.Sin(theta));

samples/Gallery/Shared/Samples/ManipulatedBitmapShaderSample.cs

@@ -22,7 +22,7 @@ namespace SkiaSharpSample.Samples
 			{
 				// invert the pixels
 				var pixels = source.Pixels;
-				for (int i = 0; i < pixels.Length; i++)
+				for (var i = 0; i < pixels.Length; i++)
 				{
 					pixels[i] = new SKColor(
 						(byte)(255 - pixels[i].Red),

samples/Gallery/Shared/Samples/PathBoundsSample.cs

@@ -19,8 +19,8 @@ namespace SkiaSharpSample.Samples
 			canvas.Clear(SKColors.White);
 			canvas.Scale(2, 2);
 
-			using (SKPaint paint = new SKPaint())
-			using (SKPaint textPaint = new SKPaint())
+			using (var paint = new SKPaint())
+			using (var textPaint = new SKPaint())
 			{
 				paint.Style = SKPaintStyle.Stroke;
 				paint.StrokeWidth = 1;
@@ -29,7 +29,7 @@ namespace SkiaSharpSample.Samples
 
 				textPaint.IsAntialias = true;
 
-				using (SKPath path = new SKPath())
+				using (var path = new SKPath())
 				{
 					path.MoveTo(-6.2157825e-7f, -25.814698f);
 					path.RCubicTo(-34.64102137842175f, 19.9999998f, 0f, 40f, 0f, 40f);
@@ -39,8 +39,7 @@ namespace SkiaSharpSample.Samples
 					paint.Color = SampleMedia.Colors.XamarinLightBlue;
 					canvas.DrawPath(path, paint);
 
-					SKRect rect;
-					path.GetBounds(out rect);
+					path.GetBounds(out var rect);
 
 					paint.Color = SampleMedia.Colors.XamarinDarkBlue;
 					canvas.DrawRect(rect, paint);

samples/Gallery/Shared/Samples/PathConicToQuadsSample.cs

@@ -26,8 +26,8 @@ namespace SkiaSharpSample.Samples
 				new SKPoint(100, 150)
 			};
 
-			using (SKPaint paint = new SKPaint())
-			using (SKPaint textPaint = new SKPaint())
+			using (var paint = new SKPaint())
+			using (var textPaint = new SKPaint())
 			{
 				paint.Style = SKPaintStyle.Stroke;
 				paint.StrokeWidth = 5;
@@ -36,7 +36,7 @@ namespace SkiaSharpSample.Samples
 
 				textPaint.IsAntialias = true;
 
-				using (SKPath path = new SKPath())
+				using (var path = new SKPath())
 				{
 					// create a conic path
 					path.MoveTo(points[0]);
@@ -47,16 +47,16 @@ namespace SkiaSharpSample.Samples
 					canvas.DrawPath(path, paint);
 
 					// get the quads from the conic points
-					SKPoint[] pts;
-					var quads = SKPath.ConvertConicToQuads(points[0], points[1], points[2], 10, out pts, 2);
+					var quads = SKPath.ConvertConicToQuads(points[0], points[1], points[2], 10, out var pts, 2);
 
 					// move the points on a bit
-					for (int i = 0; i < pts.Length; i++) pts[i].Offset(120, 0);
+					for (var i = 0; i < pts.Length; i++)
+						pts[i].Offset(120, 0);
 					// draw the quad-based path
 					using (var quadsPath = new SKPath())
 					{
 						quadsPath.MoveTo(pts[0].X, pts[0].Y);
-						for (int i = 0; i < quads; i++)
+						for (var i = 0; i < quads; i++)
 						{
 							var idx = i * 2;
 							quadsPath.CubicTo(
@@ -70,7 +70,8 @@ namespace SkiaSharpSample.Samples
 					}
 
 					// move the points on a bit
-					for (int i = 0; i < pts.Length; i++) pts[i].Offset(120, 0);
+					for (var i = 0; i < pts.Length; i++)
+						pts[i].Offset(120, 0);
 					// draw the dots
 					paint.Color = SampleMedia.Colors.XamarinGreen;
 					canvas.DrawPoints(SKPointMode.Points, pts, paint);

samples/Gallery/Shared/Samples/PathEffect2DPathSample.cs

@@ -32,9 +32,11 @@ namespace SkiaSharpSample.Samples
 			SKMatrix.PreConcat(ref offsetMatrix, SKMatrix.MakeSkew(0.5f, 0));
 
 			// create the paint
-			var paint = new SKPaint();
-			paint.PathEffect = SKPathEffect.Create2DPath(offsetMatrix, path);
-			paint.Color = SKColors.LightGray;
+			var paint = new SKPaint
+			{
+				PathEffect = SKPathEffect.Create2DPath(offsetMatrix, path),
+				Color = SKColors.LightGray
+			};
 
 			// draw a rectangle
 			canvas.DrawRect(SKRect.Create(width + blockSize, height + blockSize), paint);

samples/Gallery/Shared/Samples/PathMeasureSample.cs

@@ -18,8 +18,8 @@ namespace SkiaSharpSample.Samples
 		{
 			canvas.Clear(SKColors.White);
 
-			using (SKPaint paint = new SKPaint())
-			using (SKPath path = new SKPath())
+			using (var paint = new SKPaint())
+			using (var path = new SKPath())
 			{
 				paint.Style = SKPaintStyle.Stroke;
 				paint.StrokeWidth = 10;

samples/Gallery/Xamarin.Forms/Core/DetailContentsPage.xaml.cs

@@ -62,6 +62,7 @@ namespace SkiaSharpSample
 					canvas.IsVisible = false;
 					break;
 				case SampleBackends.Vulkan:
+				case SampleBackends.Metal:
 				default:
 					DisplayAlert("Configure Backend", "This functionality is not yet implemented.", "OK");
 					break;
@@ -124,7 +125,7 @@ namespace SkiaSharpSample
 
 		private void OnPaintGLSample(object sender, SKPaintGLSurfaceEventArgs e)
 		{
-			Sample?.DrawSample(e.Surface.Canvas, e.RenderTarget.Width, e.RenderTarget.Height);
+			Sample?.DrawSample(e.Surface.Canvas, e.BackendRenderTarget.Width, e.BackendRenderTarget.Height);
 
 			//lastImage?.Dispose();
 			//lastImage = e.Surface.Snapshot();

samples/Gallery/Xamarin.Forms/Core/DetailsPage.xaml.cs

@@ -58,8 +58,7 @@ namespace SkiaSharpSample
 			var items = Enum.GetNames(typeof(SampleBackends)).Except(new[] { nameof(SampleBackends.All) });
 			var backendString = await DisplayActionSheet("Select Backend:", "Close", null, items.ToArray());
 
-			SampleBackends backend;
-			if (Enum.TryParse(backendString, out backend))
+			if (Enum.TryParse(backendString, out SampleBackends backend))
 			{
 				((DetailContentsPage)CurrentPage).SwitchBackend(backend);
 			}