Dan Walmsley
4 years ago
29 changed files with 245 additions and 153 deletions
@ -0,0 +1,32 @@ |
|||
using System; |
|||
using Avalonia.Platform; |
|||
using Avalonia.Rendering.Composition.Animations; |
|||
using Avalonia.Rendering.Composition.Server; |
|||
|
|||
namespace Avalonia.Rendering.Composition; |
|||
|
|||
public partial class Compositor |
|||
{ |
|||
/// <summary>
|
|||
/// Creates a new CompositionTarget
|
|||
/// </summary>
|
|||
/// <param name="renderTargetFactory">A factory method to create IRenderTarget to be called from the render thread</param>
|
|||
/// <returns></returns>
|
|||
public CompositionTarget CreateCompositionTarget(Func<IRenderTarget> renderTargetFactory) |
|||
{ |
|||
return new CompositionTarget(this, new ServerCompositionTarget(_server, renderTargetFactory)); |
|||
} |
|||
|
|||
public CompositionContainerVisual CreateContainerVisual() => new(this, new ServerCompositionContainerVisual(_server)); |
|||
|
|||
public ExpressionAnimation CreateExpressionAnimation() => new ExpressionAnimation(this); |
|||
|
|||
public ExpressionAnimation CreateExpressionAnimation(string expression) => new ExpressionAnimation(this) |
|||
{ |
|||
Expression = expression |
|||
}; |
|||
|
|||
public ImplicitAnimationCollection CreateImplicitAnimationCollection() => new ImplicitAnimationCollection(this); |
|||
|
|||
public CompositionAnimationGroup CreateAnimationGroup() => new CompositionAnimationGroup(this); |
|||
} |
|||
@ -0,0 +1,68 @@ |
|||
// This file is imported from dotnet/runtime
|
|||
// Source Link: https://github.com/dotnet/runtime/blob/e63d21947e734db2da5093510a6636b5b7fb45b5/src/libraries/Common/src/System/Text/StringBuilderCache.cs
|
|||
// Commit: a9c5ead on Feb 10, 2021, https://github.com/dotnet/runtime/commit/a9c5eadd951dcba73167f72cc624eb790573663a
|
|||
//
|
|||
// Licensed to the .NET Foundation under one or more agreements.
|
|||
// The .NET Foundation licenses this file to you under the MIT license.
|
|||
|
|||
using System; |
|||
using System.Text; |
|||
|
|||
namespace Avalonia.Utilities; |
|||
|
|||
// <summary>Provide a cached reusable instance of stringbuilder per thread.</summary>
|
|||
internal static class StringBuilderCache |
|||
{ |
|||
// The value 360 was chosen in discussion with performance experts as a compromise between using
|
|||
// as little memory per thread as possible and still covering a large part of short-lived
|
|||
// StringBuilder creations on the startup path of VS designers.
|
|||
internal const int MaxBuilderSize = 360; |
|||
private const int DefaultCapacity = 16; // == StringBuilder.DefaultCapacity
|
|||
|
|||
// WARNING: We allow diagnostic tools to directly inspect this member (t_cachedInstance).
|
|||
// See https://github.com/dotnet/corert/blob/master/Documentation/design-docs/diagnostics/diagnostics-tools-contract.md for more details.
|
|||
// Please do not change the type, the name, or the semantic usage of this member without understanding the implication for tools.
|
|||
// Get in touch with the diagnostics team if you have questions.
|
|||
[ThreadStatic] |
|||
private static StringBuilder? t_cachedInstance; |
|||
|
|||
/// <summary>Get a StringBuilder for the specified capacity.</summary>
|
|||
/// <remarks>If a StringBuilder of an appropriate size is cached, it will be returned and the cache emptied.</remarks>
|
|||
public static StringBuilder Acquire(int capacity = DefaultCapacity) |
|||
{ |
|||
if (capacity <= MaxBuilderSize) |
|||
{ |
|||
StringBuilder? sb = t_cachedInstance; |
|||
if (sb != null) |
|||
{ |
|||
// Avoid stringbuilder block fragmentation by getting a new StringBuilder
|
|||
// when the requested size is larger than the current capacity
|
|||
if (capacity <= sb.Capacity) |
|||
{ |
|||
t_cachedInstance = null; |
|||
sb.Clear(); |
|||
return sb; |
|||
} |
|||
} |
|||
} |
|||
|
|||
return new StringBuilder(capacity); |
|||
} |
|||
|
|||
/// <summary>Place the specified builder in the cache if it is not too big.</summary>
|
|||
public static void Release(StringBuilder sb) |
|||
{ |
|||
if (sb.Capacity <= MaxBuilderSize) |
|||
{ |
|||
t_cachedInstance = sb; |
|||
} |
|||
} |
|||
|
|||
/// <summary>ToString() the stringbuilder, Release it to the cache, and return the resulting string.</summary>
|
|||
public static string GetStringAndRelease(StringBuilder sb) |
|||
{ |
|||
string result = sb.ToString(); |
|||
Release(sb); |
|||
return result; |
|||
} |
|||
} |
|||
Loading…
Reference in new issue