72 lines
2.0 KiB
C#
72 lines
2.0 KiB
C#
// Copyright (c) Six Labors.
|
|
// Licensed under the Six Labors Split License.
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
|
|
namespace SixLabors.ImageSharp.Drawing.Processing.Backends {
|
|
/// <summary>
|
|
/// Base type for retained drawing backend scenes.
|
|
/// </summary>
|
|
public abstract class DrawingBackendScene : IDisposable
|
|
{
|
|
private readonly IReadOnlyList<IDisposable>? ownedResources;
|
|
private bool isDisposed;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="DrawingBackendScene"/> class.
|
|
/// </summary>
|
|
/// <param name="bounds">The target bounds used to create the scene.</param>
|
|
/// <param name="ownedResources">Resources that must stay alive for the retained scene.</param>
|
|
protected DrawingBackendScene(
|
|
Rectangle bounds,
|
|
IReadOnlyList<IDisposable>? ownedResources)
|
|
{
|
|
this.Bounds = bounds;
|
|
this.ownedResources = ownedResources;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the target bounds used to create the scene.
|
|
/// </summary>
|
|
public Rectangle Bounds { get; }
|
|
|
|
/// <inheritdoc />
|
|
public void Dispose()
|
|
{
|
|
if (this.isDisposed)
|
|
{
|
|
return;
|
|
}
|
|
|
|
this.DisposeCore();
|
|
this.DisposeOwnedResources();
|
|
this.isDisposed = true;
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Disposes backend-specific resources retained by this scene.
|
|
/// </summary>
|
|
protected virtual void DisposeCore()
|
|
{
|
|
}
|
|
|
|
/// <summary>
|
|
/// Disposes resources retained for image-brush commands in this scene.
|
|
/// </summary>
|
|
private void DisposeOwnedResources()
|
|
{
|
|
if (this.ownedResources is null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
for (int i = 0; i < this.ownedResources.Count; i++)
|
|
{
|
|
this.ownedResources[i].Dispose();
|
|
}
|
|
}
|
|
}
|
|
}
|