osu/osu.Game/Graphics/OsuFont.cs

146 lines
5.8 KiB
C#

// 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 osu.Framework.Graphics.Sprites;
namespace osu.Game.Graphics
{
public static class OsuFont
{
/// <summary>
/// The default font size.
/// </summary>
public const float DEFAULT_FONT_SIZE = 16;
/// <summary>
/// The default font.
/// </summary>
public static FontUsage Default => GetFont();
public static FontUsage Numeric => GetFont(Typeface.Venera, weight: FontWeight.Bold);
public static FontUsage Torus => GetFont(Typeface.Torus, weight: FontWeight.Regular);
/// <summary>
/// Retrieves a <see cref="FontUsage"/>.
/// </summary>
/// <param name="typeface">The font typeface.</param>
/// <param name="size">The size of the text in local space. For a value of 16, a single line will have a height of 16px.</param>
/// <param name="weight">The font weight.</param>
/// <param name="italics">Whether the font is italic.</param>
/// <param name="fixedWidth">Whether all characters should be spaced the same distance apart.</param>
/// <returns>The <see cref="FontUsage"/>.</returns>
public static FontUsage GetFont(Typeface typeface = Typeface.Torus, float size = DEFAULT_FONT_SIZE, FontWeight weight = FontWeight.Medium, bool italics = false, bool fixedWidth = false)
=> new FontUsage(GetFamilyString(typeface), size, GetWeightString(typeface, weight), getItalics(italics), fixedWidth);
private static bool getItalics(in bool italicsRequested)
{
// right now none of our fonts support italics.
// should add exceptions to this rule if they come up.
return false;
}
/// <summary>
/// Retrieves the string representation of a <see cref="Typeface"/>.
/// </summary>
/// <param name="typeface">The <see cref="Typeface"/>.</param>
/// <returns>The string representation.</returns>
public static string GetFamilyString(Typeface typeface)
{
switch (typeface)
{
case Typeface.Venera:
return "Venera";
case Typeface.Torus:
return "Torus";
}
return null;
}
/// <summary>
/// Retrieves the string representation of a <see cref="FontWeight"/>.
/// </summary>
/// <param name="typeface">The <see cref="Typeface"/>.</param>
/// <param name="weight">The <see cref="FontWeight"/>.</param>
/// <returns>The string representation of <paramref name="weight"/> in the specified <paramref name="typeface"/>.</returns>
public static string GetWeightString(Typeface typeface, FontWeight weight)
{
if (typeface == Typeface.Torus && weight == FontWeight.Medium)
// torus doesn't have a medium; fallback to regular.
weight = FontWeight.Regular;
return GetWeightString(GetFamilyString(typeface), weight);
}
/// <summary>
/// Retrieves the string representation of a <see cref="FontWeight"/>.
/// </summary>
/// <param name="family">The family string.</param>
/// <param name="weight">The <see cref="FontWeight"/>.</param>
/// <returns>The string representation of <paramref name="weight"/> in the specified <paramref name="family"/>.</returns>
public static string GetWeightString(string family, FontWeight weight) => weight.ToString();
}
public static class OsuFontExtensions
{
/// <summary>
/// Creates a new <see cref="FontUsage"/> by applying adjustments to this <see cref="FontUsage"/>.
/// </summary>
/// <param name="usage">The base <see cref="FontUsage"/>.</param>
/// <param name="typeface">The font typeface. If null, the value is copied from this <see cref="FontUsage"/>.</param>
/// <param name="size">The text size. If null, the value is copied from this <see cref="FontUsage"/>.</param>
/// <param name="weight">The font weight. If null, the value is copied from this <see cref="FontUsage"/>.</param>
/// <param name="italics">Whether the font is italic. If null, the value is copied from this <see cref="FontUsage"/>.</param>
/// <param name="fixedWidth">Whether all characters should be spaced apart the same distance. If null, the value is copied from this <see cref="FontUsage"/>.</param>
/// <returns>The resulting <see cref="FontUsage"/>.</returns>
public static FontUsage With(this FontUsage usage, Typeface? typeface = null, float? size = null, FontWeight? weight = null, bool? italics = null, bool? fixedWidth = null)
{
string familyString = typeface != null ? OsuFont.GetFamilyString(typeface.Value) : usage.Family;
string weightString = weight != null ? OsuFont.GetWeightString(familyString, weight.Value) : usage.Weight;
return usage.With(familyString, size, weightString, italics, fixedWidth);
}
}
public enum Typeface
{
Venera,
Torus
}
public enum FontWeight
{
/// <summary>
/// Equivalent to weight 300.
/// </summary>
Light = 300,
/// <summary>
/// Equivalent to weight 400.
/// </summary>
Regular = 400,
/// <summary>
/// Equivalent to weight 500.
/// </summary>
Medium = 500,
/// <summary>
/// Equivalent to weight 600.
/// </summary>
SemiBold = 600,
/// <summary>
/// Equivalent to weight 700.
/// </summary>
Bold = 700,
/// <summary>
/// Equivalent to weight 900.
/// </summary>
Black = 900
}
}