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osu-lazer/osu.Game/Skinning/MaxDimensionLimitedTextureLoaderStore.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using osu.Framework.Graphics.Textures;
using osu.Framework.IO.Stores;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Processing;
namespace osu.Game.Skinning
{
public class MaxDimensionLimitedTextureLoaderStore : IResourceStore<TextureUpload>
{
private readonly IResourceStore<TextureUpload>? textureStore;
public MaxDimensionLimitedTextureLoaderStore(IResourceStore<TextureUpload>? textureStore)
{
this.textureStore = textureStore;
}
public void Dispose()
{
textureStore?.Dispose();
}
public TextureUpload Get(string name)
{
var textureUpload = textureStore?.Get(name);
// NRT not enabled on framework side classes (IResourceStore / TextureLoaderStore), welp.
if (textureUpload == null)
return null!;
return limitTextureUploadSize(textureUpload);
}
public async Task<TextureUpload> GetAsync(string name, CancellationToken cancellationToken = new CancellationToken())
{
// NRT not enabled on framework side classes (IResourceStore / TextureLoaderStore), welp.
if (textureStore == null)
return null!;
var textureUpload = await textureStore.GetAsync(name, cancellationToken).ConfigureAwait(false);
if (textureUpload == null)
return null!;
return await Task.Run(() => limitTextureUploadSize(textureUpload), cancellationToken).ConfigureAwait(false);
}
private TextureUpload limitTextureUploadSize(TextureUpload textureUpload)
{
// So there's a thing where some users have taken it upon themselves to create skin elements of insane dimensions.
// To the point where GPUs cannot load the textures (along with most image editor apps).
// To work around this, let's look out for any stupid images and shrink them down into a usable size.
const int max_supported_texture_size = 8192;
if (textureUpload.Height > max_supported_texture_size || textureUpload.Width > max_supported_texture_size)
{
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var image = Image.LoadPixelData(textureUpload.Data, textureUpload.Width, textureUpload.Height);
// The original texture upload will no longer be returned or used.
textureUpload.Dispose();
image.Mutate(i => i.Resize(new Size(
Math.Min(textureUpload.Width, max_supported_texture_size),
Math.Min(textureUpload.Height, max_supported_texture_size)
)));
return new TextureUpload(image);
}
return textureUpload;
}
public Stream? GetStream(string name) => textureStore?.GetStream(name);
public IEnumerable<string> GetAvailableResources() => textureStore?.GetAvailableResources() ?? Array.Empty<string>();
}
}