osu/osu.Game/Skinning/LegacySpriteText.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;
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using System.Threading.Tasks;
using osu.Framework.Allocation;
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using osu.Framework.Graphics.Sprites;
using osu.Framework.Text;
using osu.Game.Graphics.Sprites;
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using osuTK;
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namespace osu.Game.Skinning
{
public sealed partial class LegacySpriteText : OsuSpriteText
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{
public Vector2? MaxSizePerGlyph { get; init; }
public bool FixedWidth { get; init; }
private readonly LegacyFont font;
private LegacyGlyphStore glyphStore = null!;
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protected override char FixedWidthReferenceCharacter => '5';
protected override char[] FixedWidthExcludeCharacters => new[] { ',', '.', '%', 'x' };
// ReSharper disable once UnusedMember.Global
// being unused is the point here
public new FontUsage Font
{
get => base.Font;
set => throw new InvalidOperationException(@"Attempting to use this setter will not work correctly. "
+ $@"Use specific init-only properties exposed by {nameof(LegacySpriteText)} instead.");
}
public LegacySpriteText(LegacyFont font)
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{
this.font = font;
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Shadow = false;
UseFullGlyphHeight = false;
}
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[BackgroundDependencyLoader]
private void load(ISkinSource skin)
{
string fontPrefix = skin.GetFontPrefix(font);
base.Font = new FontUsage(fontPrefix, 1, fixedWidth: FixedWidth);
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Spacing = new Vector2(-skin.GetFontOverlap(font), 0);
glyphStore = new LegacyGlyphStore(fontPrefix, skin, MaxSizePerGlyph);
// cache common lookups ahead of time.
foreach (char c in FixedWidthExcludeCharacters)
glyphStore.Get(fontPrefix, c);
for (int i = 0; i < 10; i++)
glyphStore.Get(fontPrefix, (char)('0' + i));
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}
protected override TextBuilder CreateTextBuilder(ITexturedGlyphLookupStore store) => base.CreateTextBuilder(glyphStore);
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private class LegacyGlyphStore : ITexturedGlyphLookupStore
{
private readonly ISkin skin;
private readonly Vector2? maxSize;
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private readonly string fontName;
private readonly Dictionary<char, ITexturedCharacterGlyph?> cache = new Dictionary<char, ITexturedCharacterGlyph?>();
public LegacyGlyphStore(string fontName, ISkin skin, Vector2? maxSize)
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{
this.fontName = fontName;
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this.skin = skin;
this.maxSize = maxSize;
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}
public ITexturedCharacterGlyph? Get(string? fontName, char character)
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{
// We only service one font.
if (fontName != this.fontName)
return null;
if (cache.TryGetValue(character, out var cached))
return cached;
string lookup = getLookupName(character);
var texture = skin.GetTexture($"{fontName}-{lookup}");
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TexturedCharacterGlyph? glyph = null;
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if (texture != null)
{
if (maxSize != null)
texture = texture.WithMaximumSize(maxSize.Value);
glyph = new TexturedCharacterGlyph(new CharacterGlyph(character, 0, 0, texture.Width, 0, null), texture, 1f / texture.ScaleAdjust);
}
cache[character] = glyph;
return glyph;
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}
private static string getLookupName(char character)
{
switch (character)
{
case ',':
return "comma";
case '.':
return "dot";
case '%':
return "percent";
default:
return character.ToString();
}
}
public Task<ITexturedCharacterGlyph?> GetAsync(string fontName, char character) => Task.Run(() => Get(fontName, character));
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}
}
}