Max Katz
4 years ago
committed by
GitHub
GitHub
10 changed files with 287 additions and 104 deletions
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using System; |
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using System.Collections.Concurrent; |
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using SkiaSharp; |
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namespace Avalonia.Skia |
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{ |
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/// <summary>
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/// Cache base for Skia objects.
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/// </summary>
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internal abstract class SKCacheBase<TCachedItem, TCache> |
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where TCachedItem : IDisposable, new() |
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where TCache : new() |
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{ |
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/// <summary>
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/// Bag to hold the cached items.
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/// </summary>
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protected readonly ConcurrentBag<TCachedItem> Cache; |
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/// <summary>
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/// Shared cache.
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/// </summary>
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public static readonly TCache Shared = new TCache(); |
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protected SKCacheBase() |
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{ |
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Cache = new ConcurrentBag<TCachedItem>(); |
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} |
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/// <summary>
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/// Gets a cached item for usage.
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/// </summary>
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/// <remarks>
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/// If there is a available item in the cache, the cached item will be returned..
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/// Otherwise a new cached item will be created.
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/// </remarks>
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/// <returns></returns>
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public TCachedItem Get() |
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{ |
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if (!Cache.TryTake(out var item)) |
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{ |
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item = new TCachedItem(); |
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} |
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return item; |
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} |
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/// <summary>
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/// Returns the item for reuse later.
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/// </summary>
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/// <remarks>
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/// Do not use the item further.
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/// Do not return the same item multiple times as that will break the cache.
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/// </remarks>
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/// <param name="item"></param>
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public void Return(TCachedItem item) |
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{ |
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Cache.Add(item); |
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} |
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/// <summary>
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/// Clears and disposes all cached items.
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/// </summary>
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public void Clear() |
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{ |
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while (Cache.TryTake(out var item)) |
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{ |
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item.Dispose(); |
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} |
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} |
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} |
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} |
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@ -0,0 +1,13 @@ |
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using System.Collections.Concurrent; |
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using SkiaSharp; |
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namespace Avalonia.Skia |
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{ |
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/// <summary>
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/// Cache for SKFonts.
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/// </summary>
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internal class SKFontCache : SKCacheBase<SKFont, SKFontCache> |
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{ |
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} |
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} |
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@ -0,0 +1,99 @@ |
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using System.Buffers; |
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using System.Collections.Concurrent; |
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using System.Collections.Generic; |
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using SkiaSharp; |
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namespace Avalonia.Skia |
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{ |
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/// <summary>
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/// Cache for SKRoundRectCache.
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/// </summary>
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internal class SKRoundRectCache : SKCacheBase<SKRoundRect, SKRoundRectCache> |
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{ |
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/// <summary>
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/// Cache for points to use for setting the radii.
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/// </summary>
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private readonly ConcurrentBag<SKPoint[]> _radiiCache = new(); |
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/// <summary>
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/// Gets a cached SKRoundRect and sets it with the passed rectangle and Radii.
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/// </summary>
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/// <param name="rectangle">Rectangle size to set the cached rectangle to.</param>
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/// <param name="roundedRect">Rounded rectangle to copy the radii from.</param>
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/// <returns>Configured rounded rectangle</returns>
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public SKRoundRect GetAndSetRadii(in SKRect rectangle, in RoundedRect roundedRect) |
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{ |
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if (!Cache.TryTake(out var item)) |
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{ |
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item = new SKRoundRect(); |
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} |
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// Try and acquire a cached point array.
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if (!_radiiCache.TryTake(out var skArray)) |
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{ |
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skArray = new SKPoint[4]; |
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} |
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skArray[0].X = (float)roundedRect.RadiiTopLeft.X; |
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skArray[0].Y = (float)roundedRect.RadiiTopLeft.Y; |
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skArray[1].X = (float)roundedRect.RadiiTopRight.X; |
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skArray[1].Y = (float)roundedRect.RadiiTopRight.Y; |
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skArray[2].X = (float)roundedRect.RadiiBottomRight.X; |
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skArray[2].Y = (float)roundedRect.RadiiBottomRight.Y; |
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skArray[3].X = (float)roundedRect.RadiiBottomLeft.X; |
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skArray[3].Y = (float)roundedRect.RadiiBottomLeft.Y; |
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item.SetRectRadii(rectangle, skArray); |
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// Add the array back to the cache.
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_radiiCache.Add(skArray); |
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return item; |
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} |
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/// <summary>
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/// Gets a cached SKRoundRect and sets it with the passed rectangle and Radii.
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/// </summary>
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/// <param name="rectangle">Rectangle size to set the cached rectangle to.</param>
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/// <param name="radii">point array of radii.</param>
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/// <returns>Configured rounded rectangle</returns>
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public SKRoundRect GetAndSetRadii(in SKRect rectangle, in SKPoint[] radii) |
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{ |
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if (!Cache.TryTake(out var item)) |
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{ |
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item = new SKRoundRect(); |
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} |
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item.SetRectRadii(rectangle, radii); |
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return item; |
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} |
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/// <summary>
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/// Returns a SKPaint and resets it for reuse later.
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/// </summary>
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/// <remarks>
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/// Do not use the rect further.
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/// Do not return the same rect multiple times as that will break the cache.
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/// Uses SKRoundRect.SetEmpty(); for reuse later.
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/// </remarks>
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/// <param name="rect">Rectangle to reset</param>
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public void ReturnReset(SKRoundRect rect) |
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{ |
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rect.SetEmpty(); |
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Cache.Add(rect); |
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} |
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/// <summary>
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/// Clears and disposes all cached items.
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/// </summary>
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public new void Clear() |
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{ |
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base.Clear(); |
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// Clear out the cache of SKPoint arrays.
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while (_radiiCache.TryTake(out var item)) |
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{ |
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} |
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} |
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} |
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} |
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@ -0,0 +1,13 @@ |
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using System.Collections.Concurrent; |
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using SkiaSharp; |
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namespace Avalonia.Skia |
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{ |
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/// <summary>
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/// Cache for SKTextBlobBuilder.
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/// </summary>
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internal class SKTextBlobBuilderCache : SKCacheBase<SKTextBlobBuilder, SKTextBlobBuilderCache> |
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{ |
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} |
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} |
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