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2 changes: 1 addition & 1 deletion
2
...SKPictureImage/Properties/AssemblyInfo.cs → ....Controls.Skia/Properties/AssemblyInfo.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,3 @@ | ||
| using Avalonia.Metadata; | ||
|
|
||
| [assembly: XmlnsDefinition("https://github.com/avaloniaui", "Avalonia.SKPictureImage")] | ||
| [assembly: XmlnsDefinition("https://github.com/avaloniaui", "Avalonia.Controls.Skia")] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| using System; | ||
| using Avalonia.Media; | ||
| using Avalonia.Metadata; | ||
| using SkiaSharp; | ||
|
|
||
| namespace Avalonia.Controls.Skia | ||
| { | ||
| /// <summary> | ||
| /// SKBitmap control. | ||
| /// </summary> | ||
| public class SKBitmapControl : Control, IAffectsRender | ||
| { | ||
| /// <summary> | ||
| /// Defines the <see cref="Bitmap"/> property. | ||
| /// </summary> | ||
| public static readonly StyledProperty<SKBitmap?> BitmapProperty = | ||
| AvaloniaProperty.Register<SKBitmapControl, SKBitmap?>(nameof(Bitmap)); | ||
|
|
||
| /// <summary> | ||
| /// Defines the <see cref="Stretch"/> property. | ||
| /// </summary> | ||
| public static readonly StyledProperty<Stretch> StretchProperty = | ||
| AvaloniaProperty.Register<SKBitmapControl, Stretch>(nameof(Stretch), Stretch.Uniform); | ||
|
|
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| /// <summary> | ||
| /// Defines the <see cref="StretchDirection"/> property. | ||
| /// </summary> | ||
| public static readonly StyledProperty<StretchDirection> StretchDirectionProperty = | ||
| AvaloniaProperty.Register<SKBitmapControl, StretchDirection>(nameof(StretchDirection), StretchDirection.Both); | ||
|
|
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| /// <inheritdoc/> | ||
| public event EventHandler? Invalidated; | ||
|
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| /// <summary> | ||
| /// Gets or sets the <see cref="SKBitmap"/> bitmap. | ||
| /// </summary> | ||
| [Content] | ||
| public SKBitmap? Bitmap | ||
| { | ||
| get => GetValue(BitmapProperty); | ||
| set => SetValue(BitmapProperty, value); | ||
| } | ||
|
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| /// <summary> | ||
| /// Gets or sets a value controlling how the image will be stretched. | ||
| /// </summary> | ||
| public Stretch Stretch | ||
| { | ||
| get { return GetValue(StretchProperty); } | ||
| set { SetValue(StretchProperty, value); } | ||
| } | ||
|
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| /// <summary> | ||
| /// Gets or sets a value controlling in what direction the image will be stretched. | ||
| /// </summary> | ||
| public StretchDirection StretchDirection | ||
| { | ||
| get { return GetValue(StretchDirectionProperty); } | ||
| set { SetValue(StretchDirectionProperty, value); } | ||
| } | ||
|
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||
| static SKBitmapControl() | ||
| { | ||
| AffectsRender<SKBitmapControl>(BitmapProperty, StretchProperty, StretchDirectionProperty); | ||
| AffectsMeasure<SKBitmapControl>(BitmapProperty, StretchProperty, StretchDirectionProperty); | ||
| } | ||
|
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| protected override Size MeasureOverride(Size availableSize) | ||
| { | ||
| var bitmap = Bitmap; | ||
| if (bitmap is null) | ||
| { | ||
| return new Size(); | ||
| } | ||
|
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| var sourceSize = new Size(bitmap.Width, bitmap.Height); | ||
| return Stretch.CalculateSize(availableSize, sourceSize, StretchDirection); | ||
| } | ||
|
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| protected override Size ArrangeOverride(Size finalSize) | ||
| { | ||
| var bitmap = Bitmap; | ||
| if (bitmap is null) | ||
| { | ||
| return new Size(); | ||
| } | ||
|
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| var sourceSize = new Size(bitmap.Width, bitmap.Height); | ||
| return Stretch.CalculateSize(finalSize, sourceSize); | ||
| } | ||
|
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| public override void Render(DrawingContext context) | ||
| { | ||
| var bitmap = Bitmap; | ||
| if (bitmap is null) | ||
| { | ||
| return; | ||
| } | ||
|
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||
| var viewPort = new Rect(Bounds.Size); | ||
| var sourceSize = new Size(bitmap.Width, bitmap.Height); | ||
| if (sourceSize.Width <= 0 || sourceSize.Height <= 0) | ||
| { | ||
| return; | ||
| } | ||
|
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| var scale = Stretch.CalculateScaling(Bounds.Size, sourceSize, StretchDirection); | ||
| var scaledSize = sourceSize * scale; | ||
| var destRect = viewPort | ||
| .CenterRect(new Rect(scaledSize)) | ||
| .Intersect(viewPort); | ||
| var sourceRect = new Rect(sourceSize) | ||
| .CenterRect(new Rect(destRect.Size / scale)); | ||
|
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| var bounds = SKRect.Create(0, 0, bitmap.Width, bitmap.Height); | ||
| var scaleMatrix = Matrix.CreateScale( | ||
| destRect.Width / sourceRect.Width, | ||
| destRect.Height / sourceRect.Height); | ||
| var translateMatrix = Matrix.CreateTranslation( | ||
| -sourceRect.X + destRect.X - bounds.Top, | ||
| -sourceRect.Y + destRect.Y - bounds.Left); | ||
|
|
||
| if (bounds.IsEmpty || destRect.IsEmpty) | ||
| { | ||
| return; | ||
| } | ||
|
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| using (context.PushClip(destRect)) | ||
| using (context.PushPreTransform(translateMatrix * scaleMatrix)) | ||
| { | ||
| context.Custom(new SKBitmapDrawOperation(new Rect(0, 0, bounds.Width, bounds.Height), bitmap)); | ||
| } | ||
| } | ||
|
|
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| /// <inheritdoc/> | ||
| protected override void OnPropertyChanged<T>(AvaloniaPropertyChangedEventArgs<T> change) | ||
| { | ||
| base.OnPropertyChanged(change); | ||
|
|
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| if (change.Property == BitmapProperty) | ||
| { | ||
| RaiseInvalidated(EventArgs.Empty); | ||
| } | ||
| } | ||
|
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| /// <summary> | ||
| /// Raises the <see cref="Invalidated"/> event. | ||
| /// </summary> | ||
| /// <param name="e">The event args.</param> | ||
| protected void RaiseInvalidated(EventArgs e) => Invalidated?.Invoke(this, e); | ||
| } | ||
| } |
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