Rendering - Made the way layering is rendered 99.5% less stupid

src/Artemis.Core/Extensions/SKPaintExtensions.cs

@@ -0,0 +1,16 @@
+using SkiaSharp;
+
+namespace Artemis.Core
+{
+    internal static class SKPaintExtensions
+    {
+        internal static void DisposeSelfAndProperties(this SKPaint paint)
+        {
+            paint.ImageFilter?.Dispose();
+            paint.ColorFilter?.Dispose();
+            paint.MaskFilter?.Dispose();
+            paint.Shader?.Dispose();
+            paint.Dispose();
+        }
+    }
+}

src/Artemis.Core/Models/Profile/Folder.cs

@@ -168,7 +168,7 @@ namespace Artemis.Core
         #region Rendering
 
         /// <inheritdoc />
-        public override void Render(SKCanvas canvas)
+        public override void Render(SKCanvas canvas, SKPoint basePosition)
         {
             if (Disposed)
                 throw new ObjectDisposedException("Folder");
@@ -189,41 +189,38 @@ namespace Artemis.Core
                     baseLayerEffect.Update(Timeline.Delta.TotalSeconds);
                 }
 
+                SKPaint layerPaint = new();
                 try
                 {
-                    canvas.Save();
-                    Renderer.Open(Path, Parent as Folder);
-                    if (Renderer.Surface == null || Renderer.Path == null || Renderer.Paint == null)
-                        throw new ArtemisCoreException("Failed to open folder render context");
-
-                    SKRect rendererBounds = Renderer.Path.Bounds;
+                    SKRect rendererBounds = SKRect.Create(0, 0, Path.Bounds.Width, Path.Bounds.Height);
                     foreach (BaseLayerEffect baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                        baseLayerEffect.PreProcess(Renderer.Surface.Canvas, rendererBounds, Renderer.Paint);
+                        baseLayerEffect.PreProcess(canvas, rendererBounds, layerPaint);
+
+                    canvas.SaveLayer(layerPaint);
+                    canvas.Translate(Path.Bounds.Left - basePosition.X, Path.Bounds.Top - basePosition.Y);
 
                     // If required, apply the opacity override of the module to the root folder
                     if (IsRootFolder && Profile.Module.OpacityOverride < 1)
                     {
                         double multiplier = Easings.SineEaseInOut(Profile.Module.OpacityOverride);
-                        Renderer.Paint.Color = Renderer.Paint.Color.WithAlpha((byte) (Renderer.Paint.Color.Alpha * multiplier));
+                        layerPaint.Color = layerPaint.Color.WithAlpha((byte) (layerPaint.Color.Alpha * multiplier));
                     }
 
                     // No point rendering if the alpha was set to zero by one of the effects
-                    if (Renderer.Paint.Color.Alpha == 0)
+                    if (layerPaint.Color.Alpha == 0)
                         return;
 
                     // Iterate the children in reverse because the first layer must be rendered last to end up on top
                     for (int index = Children.Count - 1; index > -1; index--)
-                        Children[index].Render(Renderer.Surface.Canvas);
+                        Children[index].Render(canvas, new SKPoint(Path.Bounds.Left, Path.Bounds.Top));
 
                     foreach (BaseLayerEffect baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                        baseLayerEffect.PostProcess(Renderer.Surface.Canvas, rendererBounds, Renderer.Paint);
-
-                    canvas.DrawSurface(Renderer.Surface, Renderer.TargetLocation, Renderer.Paint);
+                        baseLayerEffect.PostProcess(canvas, rendererBounds, layerPaint);
                 }
                 finally
                 {
                     canvas.Restore();
-                    Renderer.Close();
+                    layerPaint.DisposeSelfAndProperties();
                 }
 
                 Timeline.ClearDelta();
@@ -239,7 +236,6 @@ namespace Artemis.Core
 
             foreach (ProfileElement profileElement in Children)
                 profileElement.Dispose();
-            Renderer.Dispose();
 
             base.Dispose(disposing);
         }

src/Artemis.Core/Models/Profile/Layer.cs

@@ -154,7 +154,6 @@ namespace Artemis.Core
             _layerBrush?.Dispose();
             _general.Dispose();
             _transform.Dispose();
-            Renderer.Dispose();
 
             base.Dispose(disposing);
         }
@@ -183,7 +182,7 @@ namespace Artemis.Core
             General.ShapeType.CurrentValueSet += ShapeTypeOnCurrentValueSet;
             ApplyShapeType();
             ActivateLayerBrush();
-            
+
             Reset();
         }
 
@@ -278,7 +277,7 @@ namespace Artemis.Core
         }
 
         /// <inheritdoc />
-        public override void Render(SKCanvas canvas)
+        public override void Render(SKCanvas canvas, SKPoint basePosition)
         {
             if (Disposed)
                 throw new ObjectDisposedException("Layer");
@@ -290,9 +289,9 @@ namespace Artemis.Core
             if (LayerBrush == null || LayerBrush?.BaseProperties?.PropertiesInitialized == false)
                 return;
 
-            RenderTimeline(Timeline, canvas);
+            RenderTimeline(Timeline, canvas, basePosition);
             foreach (Timeline extraTimeline in Timeline.ExtraTimelines.ToList())
-                RenderTimeline(extraTimeline, canvas);
+                RenderTimeline(extraTimeline, canvas, basePosition);
             Timeline.ClearDelta();
         }
 
@@ -313,7 +312,7 @@ namespace Artemis.Core
             }
         }
 
-        private void RenderTimeline(Timeline timeline, SKCanvas canvas)
+        private void RenderTimeline(Timeline timeline, SKCanvas canvas, SKPoint basePosition)
         {
             if (Path == null || LayerBrush == null)
                 throw new ArtemisCoreException("The layer is not yet ready for rendering");
@@ -322,26 +321,31 @@ namespace Artemis.Core
                 return;
 
             ApplyTimeline(timeline);
-            
+
             if (LayerBrush?.BrushType != LayerBrushType.Regular)
                 return;
 
+            SKPaint layerPaint = new();
             try
             {
                 canvas.Save();
-                Renderer.Open(Path, Parent as Folder);
-                if (Renderer.Surface == null || Renderer.Path == null || Renderer.Paint == null)
-                    throw new ArtemisCoreException("Failed to open layer render context");
+                canvas.Translate(Path.Bounds.Left - basePosition.X, Path.Bounds.Top - basePosition.Y);
+                using SKPath clipPath = new(Path);
+                clipPath.Transform(SKMatrix.CreateTranslation(Path.Bounds.Left * -1, Path.Bounds.Top * -1));
+                canvas.ClipPath(clipPath);
+
+                SKRect layerBounds = SKRect.Create(0, 0, Path.Bounds.Width, Path.Bounds.Height);
 
                 // Apply blend mode and color
-                Renderer.Paint.BlendMode = General.BlendMode.CurrentValue;
-                Renderer.Paint.Color = new SKColor(0, 0, 0, (byte) (Transform.Opacity.CurrentValue * 2.55f));
+                layerPaint.BlendMode = General.BlendMode.CurrentValue;
+                layerPaint.Color = new SKColor(0, 0, 0, (byte) (Transform.Opacity.CurrentValue * 2.55f));
 
                 using SKPath renderPath = new();
+
                 if (General.ShapeType.CurrentValue == LayerShapeType.Rectangle)
-                    renderPath.AddRect(Renderer.Path.Bounds);
+                    renderPath.AddRect(layerBounds);
                 else
-                    renderPath.AddOval(Renderer.Path.Bounds);
+                    renderPath.AddOval(layerBounds);
 
                 if (General.TransformMode.CurrentValue == LayerTransformMode.Normal)
                 {
@@ -356,54 +360,50 @@ namespace Artemis.Core
                     if (LayerBrush.SupportsTransformation)
                     {
                         SKMatrix rotationMatrix = GetTransformMatrix(true, false, false, true);
-                        Renderer.Surface.Canvas.SetMatrix(Renderer.Surface.Canvas.TotalMatrix.PreConcat(rotationMatrix));
+                        canvas.SetMatrix(canvas.TotalMatrix.PreConcat(rotationMatrix));
                     }
 
-                    // If a brush is a bad boy and tries to color outside the lines, ensure that its clipped off
-                    Renderer.Surface.Canvas.ClipPath(renderPath);
-                    DelegateRendering(renderPath.Bounds);
+                    DelegateRendering(canvas, renderPath, renderPath.Bounds, layerPaint);
                 }
                 else if (General.TransformMode.CurrentValue == LayerTransformMode.Clip)
                 {
                     SKMatrix renderPathMatrix = GetTransformMatrix(true, true, true, true);
                     renderPath.Transform(renderPathMatrix);
 
-                    // If a brush is a bad boy and tries to color outside the lines, ensure that its clipped off
-                    Renderer.Surface.Canvas.ClipPath(renderPath);
-                    DelegateRendering(Renderer.Path.Bounds);
+                    DelegateRendering(canvas, renderPath, layerBounds, layerPaint);
                 }
-
-                canvas.DrawSurface(Renderer.Surface, Renderer.TargetLocation, Renderer.Paint);
             }
             finally
             {
-                try
-                {
-                    canvas.Restore();
-                }
-                catch
-                {
-                    // ignored
-                }
-
-                Renderer.Close();
+                canvas.Restore();
+                layerPaint.DisposeSelfAndProperties();
             }
         }
 
-        private void DelegateRendering(SKRect bounds)
+        private void DelegateRendering(SKCanvas canvas, SKPath renderPath, SKRect bounds, SKPaint layerPaint)
         {
             if (LayerBrush == null)
                 throw new ArtemisCoreException("The layer is not yet ready for rendering");
-            if (Renderer.Surface == null || Renderer.Paint == null)
-                throw new ArtemisCoreException("Failed to open layer render context");
 
             foreach (BaseLayerEffect baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                baseLayerEffect.PreProcess(Renderer.Surface.Canvas, bounds, Renderer.Paint);
+                baseLayerEffect.PreProcess(canvas, bounds, layerPaint);
 
-            LayerBrush.InternalRender(Renderer.Surface.Canvas, bounds, Renderer.Paint);
+            try
+            {
+                canvas.SaveLayer(layerPaint);
 
-            foreach (BaseLayerEffect baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                baseLayerEffect.PostProcess(Renderer.Surface.Canvas, bounds, Renderer.Paint);
+                // If a brush is a bad boy and tries to color outside the lines, ensure that its clipped off
+                canvas.ClipPath(renderPath);
+                LayerBrush.InternalRender(canvas, bounds, layerPaint);
+
+                foreach (BaseLayerEffect baseLayerEffect in LayerEffects.Where(e => e.Enabled))
+                    baseLayerEffect.PostProcess(canvas, bounds, layerPaint);
+            }
+
+            finally
+            {
+                canvas.Restore();
+            }
         }
 
         internal void CalculateRenderProperties()

src/Artemis.Core/Models/Profile/Profile.cs

@@ -81,7 +81,7 @@ namespace Artemis.Core
         }
 
         /// <inheritdoc />
-        public override void Render(SKCanvas canvas)
+        public override void Render(SKCanvas canvas, SKPoint basePosition)
         {
             lock (_lock)
             {
@@ -91,7 +91,7 @@ namespace Artemis.Core
                     throw new ArtemisCoreException($"Cannot render inactive profile: {this}");
 
                 foreach (ProfileElement profileElement in Children)
-                    profileElement.Render(canvas);
+                    profileElement.Render(canvas, basePosition);
             }
         }
 

src/Artemis.Core/Models/Profile/ProfileElement.cs

@@ -104,7 +104,7 @@ namespace Artemis.Core
         /// <summary>
         ///     Renders the element
         /// </summary>
-        public abstract void Render(SKCanvas canvas);
+        public abstract void Render(SKCanvas canvas, SKPoint basePosition);
 
         /// <summary>
         ///     Resets the internal state of the element

src/Artemis.Core/Models/Profile/RenderProfileElement.cs

@@ -19,7 +19,6 @@ namespace Artemis.Core
         internal RenderProfileElement(Profile profile) : base(profile)
         {
             Timeline = new Timeline();
-            Renderer = new Renderer();
             ExpandedPropertyGroups = new List<string>();
             LayerEffectsList = new List<BaseLayerEffect>();
 
@@ -127,7 +126,6 @@ namespace Artemis.Core
             {
                 base.Parent = value;
                 OnPropertyChanged(nameof(Parent));
-                Renderer.Invalidate();
             }
         }
 
@@ -144,7 +142,6 @@ namespace Artemis.Core
                 // I can't really be sure about the performance impact of calling Bounds often but
                 // SkiaSharp calls SkiaApi.sk_path_get_bounds (Handle, &rect); which sounds expensive
                 Bounds = value?.Bounds ?? SKRect.Empty;
-                Renderer.Invalidate();
             }
         }
 
@@ -157,7 +154,6 @@ namespace Artemis.Core
             private set => SetAndNotify(ref _bounds, value);
         }
 
-        internal Renderer Renderer { get; }
 
         #region Property group expansion
 

src/Artemis.Core/Models/Profile/Renderer.cs

@@ -108,5 +108,11 @@ namespace Artemis.Core
 
             _disposed = true;
         }
+
+        ~Renderer()
+        {
+            if (IsOpen)
+                Close();
+        }
     }
 }

src/Artemis.Core/Plugins/Modules/ProfileModule.cs

@@ -177,7 +177,7 @@ namespace Artemis.Core.Modules
             lock (_lock)
             {
                 // Render the profile
-                ActiveProfile?.Render(canvas);
+                ActiveProfile?.Render(canvas, SKPoint.Empty);
             }
 
             ProfileRendered(deltaTime, canvas, canvasInfo);

src/Artemis.Core/Utilities/IntroAnimation.cs

@@ -30,7 +30,7 @@ namespace Artemis.Core
         public void Render(double deltaTime, SKCanvas canvas)
         {
             AnimationProfile.Update(deltaTime);
-            AnimationProfile.Render(canvas);
+            AnimationProfile.Render(canvas, SKPoint.Empty);
         }
 
         private Profile CreateIntroProfile()

src/Artemis.UI/Screens/Settings/Debug/Tabs/RenderDebugViewModel.cs

@@ -90,9 +90,24 @@ namespace Artemis.UI.Screens.Settings.Debug.Tabs
 
         private void CoreServiceOnFrameRendered(object sender, FrameRenderedEventArgs e)
         {
+            using SKImage skImage = e.Texture.Surface.Snapshot();
+            SKImageInfo bitmapInfo = e.Texture.ImageInfo;
+
+            if (_frameTargetPath != null)
+            {
+                using (SKData data = skImage.Encode(SKEncodedImageFormat.Png, 100))
+                {
+                    using (FileStream stream = File.OpenWrite(_frameTargetPath))
+                    {
+                        data.SaveTo(stream);
+                    }
+                }
+
+                _frameTargetPath = null;
+            }
+
             Execute.OnUIThreadSync(() =>
             {
-                SKImageInfo bitmapInfo = e.Texture.ImageInfo;
                 RenderHeight = bitmapInfo.Height;
                 RenderWidth = bitmapInfo.Width;
 
@@ -103,25 +118,10 @@ namespace Artemis.UI.Screens.Settings.Debug.Tabs
                     return;
                 }
 
-                using SKImage skImage = e.Texture.Surface.Snapshot();
-
-                if (_frameTargetPath != null)
-                {
-                    using (SKData data = skImage.Encode(SKEncodedImageFormat.Png, 100))
-                    {
-                        using (FileStream stream = File.OpenWrite(_frameTargetPath))
-                        {
-                            data.SaveTo(stream);
-                        }
-                    }
-
-                    _frameTargetPath = null;
-                }
-
-                SKImageInfo info = new(skImage.Width, skImage.Height);
                 writable.Lock();
-                using (SKPixmap pixmap = new(info, writable.BackBuffer, writable.BackBufferStride))
+                using (SKPixmap pixmap = new(bitmapInfo, writable.BackBuffer, writable.BackBufferStride))
                 {
+                    // ReSharper disable once AccessToDisposedClosure - Looks fine
                     skImage.ReadPixels(pixmap, 0, 0);
                 }
 
@@ -140,6 +140,7 @@ namespace Artemis.UI.Screens.Settings.Debug.Tabs
                 _frames = 0;
                 _frameCountStart = DateTime.Now;
             }
+
             _frames++;
         }
     }

src/Artemis.sln.DotSettings

@@ -225,6 +225,7 @@
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EAlwaysTreatStructAsNotReorderableMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateBlankLinesAroundFieldToBlankLinesAroundProperty/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=luma/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=pixmap/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=snackbar/@EntryIndexedValue">True</s:Boolean>