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96 lines
3.5 KiB
C#
96 lines
3.5 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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using osu.Framework.Graphics.Textures;
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using osu.Framework.IO.Stores;
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using SixLabors.ImageSharp;
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using SixLabors.ImageSharp.Processing;
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namespace osu.Game.Beatmaps
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{
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// Implementation of this class is based off of `MaxDimensionLimitedTextureLoaderStore`.
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// If issues are found it's worth checking to make sure similar issues exist there.
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public class BeatmapPanelBackgroundTextureLoaderStore : IResourceStore<TextureUpload>
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{
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// The aspect ratio of SetPanelBackground at its maximum size (very tall window).
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private const float minimum_display_ratio = 512 / 80f;
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private readonly IResourceStore<TextureUpload>? textureStore;
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public BeatmapPanelBackgroundTextureLoaderStore(IResourceStore<TextureUpload>? textureStore)
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{
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this.textureStore = textureStore;
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}
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public void Dispose()
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{
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textureStore?.Dispose();
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}
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public TextureUpload Get(string name)
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{
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var textureUpload = textureStore?.Get(name);
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// NRT not enabled on framework side classes (IResourceStore / TextureLoaderStore), welp.
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if (textureUpload == null)
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return null!;
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return limitTextureUploadSize(textureUpload);
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}
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public async Task<TextureUpload> GetAsync(string name, CancellationToken cancellationToken = new CancellationToken())
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{
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// NRT not enabled on framework side classes (IResourceStore / TextureLoaderStore), welp.
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if (textureStore == null)
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return null!;
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var textureUpload = await textureStore.GetAsync(name, cancellationToken).ConfigureAwait(false);
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if (textureUpload == null)
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return null!;
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return await Task.Run(() => limitTextureUploadSize(textureUpload), cancellationToken).ConfigureAwait(false);
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}
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private TextureUpload limitTextureUploadSize(TextureUpload textureUpload)
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{
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var image = Image.LoadPixelData(textureUpload.Data, textureUpload.Width, textureUpload.Height);
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// The original texture upload will no longer be returned or used.
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textureUpload.Dispose();
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Size size = image.Size;
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// Assume that panel backgrounds are always displayed using `FillMode.Fill`.
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// Also assume that all backgrounds are wider than they are tall, so the
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// fill is always going to be based on width.
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//
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// We need to include enough height to make this work for all ratio panels are displayed at.
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int usableHeight = (int)Math.Ceiling(size.Width * 1 / minimum_display_ratio);
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usableHeight = Math.Min(size.Height, usableHeight);
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// Crop the centre region of the background for now.
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Rectangle cropRectangle = new Rectangle(
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0,
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(size.Height - usableHeight) / 2,
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size.Width,
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usableHeight
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);
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image.Mutate(i => i.Crop(cropRectangle));
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return new TextureUpload(image);
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}
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public Stream? GetStream(string name) => textureStore?.GetStream(name);
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public IEnumerable<string> GetAvailableResources() => textureStore?.GetAvailableResources() ?? Array.Empty<string>();
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}
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}
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