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Initial implementation of layer previews
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| using PixiEditor.Models.DataHolders; | ||
| using SkiaSharp; | ||
| using System; | ||
| using System.Windows; | ||
| using System.Windows.Media; | ||
| using System.Windows.Media.Imaging; | ||
|
|
||
| namespace PixiEditor.Models.Controllers | ||
| { | ||
| class SurfaceRenderer : IDisposable | ||
| { | ||
| public SKSurface BackingSurface { get; private set; } | ||
| public WriteableBitmap FinalBitmap { get; private set; } | ||
| private SKPaint BlendingPaint { get; } = new SKPaint() { BlendMode = SKBlendMode.SrcOver }; | ||
| public SurfaceRenderer(int width, int height) | ||
| { | ||
| FinalBitmap = new WriteableBitmap(width, height, 96, 96, PixelFormats.Pbgra32, null); | ||
| var imageInfo = new SKImageInfo(width, height, SKColorType.Bgra8888, SKAlphaType.Premul, SKColorSpace.CreateSrgb()); | ||
| BackingSurface = SKSurface.Create(imageInfo, FinalBitmap.BackBuffer, FinalBitmap.BackBufferStride); | ||
| } | ||
|
|
||
| public void Dispose() | ||
| { | ||
| BackingSurface.Dispose(); | ||
| BlendingPaint.Dispose(); | ||
| } | ||
|
|
||
| public void Draw(Surface otherSurface, byte opacity) | ||
| { | ||
| BackingSurface.Canvas.Clear(); | ||
| FinalBitmap.Lock(); | ||
| BlendingPaint.Color = new SKColor(255, 255, 255, opacity); | ||
| //otherSurface.SkiaSurface.Draw(BackingSurface.Canvas, 0, 0, BlendingPaint); | ||
| BackingSurface.Canvas.DrawImage(otherSurface.SkiaSurface.Snapshot(), new SKRect(0, 0, FinalBitmap.PixelWidth, FinalBitmap.PixelHeight)); | ||
| FinalBitmap.AddDirtyRect(new Int32Rect(0, 0, FinalBitmap.PixelWidth, FinalBitmap.PixelHeight)); | ||
| FinalBitmap.Unlock(); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| <UserControl x:Class="PixiEditor.Views.UserControls.PlainLayerView" | ||
| xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" | ||
| xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" | ||
| xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" | ||
| xmlns:d="http://schemas.microsoft.com/expression/blend/2008" | ||
| xmlns:local="clr-namespace:PixiEditor.Views.UserControls" | ||
| mc:Ignorable="d" | ||
| x:Name="uc" | ||
| d:DesignHeight="450" d:DesignWidth="800"> | ||
| <Image x:Name="image" Width="{Binding Width, ElementName=uc}" Height="{Binding Height, ElementName=uc}" | ||
| RenderOptions.BitmapScalingMode="NearestNeighbor" Stretch="Uniform"/> | ||
| </UserControl> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| using PixiEditor.Models.Controllers; | ||
| using PixiEditor.Models.Layers; | ||
| using System; | ||
| using System.Windows; | ||
| using System.Windows.Controls; | ||
|
|
||
| namespace PixiEditor.Views.UserControls | ||
| { | ||
| public partial class PlainLayerView : UserControl | ||
| { | ||
| public static readonly DependencyProperty TargetLayerProperty = | ||
| DependencyProperty.Register(nameof(TargetLayer), typeof(Layer), typeof(PlainLayerView), new PropertyMetadata(null, OnLayerChanged)); | ||
|
|
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| public Layer TargetLayer | ||
| { | ||
| get => (Layer)GetValue(TargetLayerProperty); | ||
| set => SetValue(TargetLayerProperty, value); | ||
| } | ||
|
|
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| private SurfaceRenderer renderer; | ||
|
|
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| public PlainLayerView() | ||
| { | ||
| InitializeComponent(); | ||
| SizeChanged += OnControlSizeChanged; | ||
| Unloaded += OnControlUnloaded; | ||
| } | ||
|
|
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| private static void OnLayerChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args) | ||
| { | ||
| var view = (PlainLayerView)sender; | ||
| if (args.OldValue != null) | ||
| ((Layer)args.OldValue).LayerBitmapChanged -= view.OnLayerBitmapChanged; | ||
| if (args.NewValue != null) | ||
| { | ||
| var layer = ((Layer)args.NewValue); | ||
| layer.LayerBitmapChanged += view.OnLayerBitmapChanged; | ||
| view.Resize(layer.Width, layer.Height); | ||
| } | ||
| } | ||
| public void Resize(int newWidth, int newHeight) | ||
| { | ||
| renderer?.Dispose(); | ||
| renderer = new SurfaceRenderer(newWidth, newHeight); | ||
| image.Source = renderer.FinalBitmap; | ||
| Update(); | ||
| } | ||
|
|
||
| private void Update() | ||
| { | ||
| renderer.Draw(TargetLayer.LayerBitmap, (byte)(TargetLayer.Opacity * 255)); | ||
| } | ||
|
|
||
| private void OnControlUnloaded(object sender, RoutedEventArgs e) | ||
| { | ||
| /* | ||
| if (LogicalTreeHelper.GetParent(this) != null) | ||
| return; | ||
| renderer?.Dispose(); | ||
| TargetLayer.LayerBitmapChanged -= OnLayerBitmapChanged;*/ | ||
| } | ||
|
|
||
| private void OnControlSizeChanged(object sender, SizeChangedEventArgs e) | ||
| { | ||
| if (TargetLayer == null) | ||
| return; | ||
| MaybeResize(e.NewSize); | ||
| } | ||
|
|
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| private bool MaybeResize(Size newSize) | ||
| { | ||
| var (w, h) = GetOptimizedDimensions(TargetLayer.Width, TargetLayer.Height, newSize.Width, newSize.Height); | ||
| Resize(w, h); | ||
| return true; | ||
| } | ||
|
|
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| private (int, int) GetOptimizedDimensions(int width, int height, double viewWidth, double viewHeight) | ||
| { | ||
| if (width <= viewWidth && height <= viewHeight) | ||
| return (width, height); | ||
|
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| double frac = width / (double)height; | ||
| double viewFrac = viewWidth / viewHeight; | ||
|
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| if (frac > viewFrac) | ||
| { | ||
| double targetWidth = viewWidth; | ||
| double targetHeight = viewWidth / frac; | ||
| return ((int)Math.Ceiling(targetWidth), (int)Math.Ceiling(targetHeight)); | ||
| } | ||
| else | ||
| { | ||
| double targetHeight = viewHeight; | ||
| double targetWidth = targetHeight * frac; | ||
| return ((int)Math.Ceiling(targetWidth), (int)Math.Ceiling(targetHeight)); | ||
| } | ||
| } | ||
|
|
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| private void OnLayerBitmapChanged(object sender, Int32Rect e) | ||
| { | ||
| if (!MaybeResize(RenderSize)) | ||
| Update(); | ||
| } | ||
| } | ||
| } |