Add new font search criterea.

Quik/Media/Font/FontFace.cs

@@ -0,0 +1,240 @@
+using System;
+using System.Net.WebSockets;
+using System.Text;
+using Quik.Media.Font;
+
+namespace Quik.Media.Font
+{
+    public readonly struct FontFace : IEquatable<FontFace>
+    {
+        public string Family { get; }
+        public FontSlant Slant { get; }
+        public FontWeight Weight { get; }
+        public FontStretch Stretch { get; }
+
+        public FontFace(string family, FontSlant slant, FontWeight weight, FontStretch stretch)
+        {
+            Family = family;
+            Slant = slant;
+            Weight = weight;
+            Stretch = stretch;
+        }
+
+        public override string ToString()
+        {
+            StringBuilder builder = new StringBuilder(Family);
+            
+            if (Slant != FontSlant.Normal)
+            {
+                builder.Append(' ');
+                builder.Append(Slant);
+            }
+            if (Stretch != FontStretch.Normal)
+            {
+                builder.Append(' ');
+                builder.Append(Stretch);
+            }
+            if (Weight != FontWeight.Normal)
+            {
+                builder.Append(' ');
+                builder.Append(Weight);
+            }
+
+            if (Slant == FontSlant.Normal &&
+                Stretch == FontStretch.Normal &&
+                Weight == FontWeight.Normal)
+            {
+                builder.Append(" Regular");
+            }
+
+            return builder.ToString();
+        }
+
+        public override int GetHashCode()
+        {
+            return HashCode.Combine(Family, Slant, Weight, Stretch);
+        }
+
+        public static bool operator==(FontFace a, FontFace b)
+        {
+            return  (a.Slant == b.Slant) &&
+                    (a.Weight == b.Weight) &&
+                    (a.Stretch == b.Stretch) &&
+                    (a.Family == a.Family);
+        }
+
+        public static bool operator!=(FontFace a, FontFace b)
+        {
+            return  (a.Slant != b.Slant) ||
+                    (a.Weight != b.Weight) ||
+                    (a.Stretch != b.Stretch) ||
+                    (a.Family != b.Family);
+        }
+
+        public bool Equals(FontFace other)
+        {
+            return this == other;
+        }
+
+        public override bool Equals(object obj)
+        {
+            return  (obj.GetType() == typeof(FontFace)) &&
+                    this == (FontFace)obj;
+        }
+
+        public static FontFace Parse(string family, string style)
+        {
+            FontSlant slant = FontSlant.Normal;
+            FontWeight weight = FontWeight.Normal;
+            FontStretch stretch = FontStretch.Normal;
+
+            string[] tokens = style.Split(' ');
+
+            foreach (string token in tokens)
+            {
+                /**/ if (TryParseSlant(token, out FontSlant xslant)) slant = xslant;
+                else if (TryParseWeight(token, out FontWeight xweight)) weight = xweight;
+                else if (TryParseStretch(token, out FontStretch xstretch)) stretch = xstretch;
+            }
+
+            return new FontFace(family, slant, weight, stretch);
+        }
+
+        public static FontFace Parse(string face)
+        {
+            StringBuilder family = new StringBuilder();
+            FontSlant slant = FontSlant.Normal;
+            FontWeight weight = FontWeight.Normal;
+            FontStretch stretch = FontStretch.Normal;
+
+            string[] tokens = face.Split(' ');
+            foreach (string token in tokens)
+            {
+                string xtoken = token.ToLower();
+
+                if (xtoken == "regular" || xtoken == "normal")
+                {
+                    continue;
+                }
+                else if (TryParseSlant(xtoken, out FontSlant xslant)) slant = xslant;
+                else if (TryParseWeight(xtoken, out FontWeight xweight)) weight = xweight;
+                else if (TryParseStretch(xtoken, out FontStretch xstretch)) stretch = xstretch;
+                else
+                {
+                    family.Append(token);
+                }
+            }
+
+            return new FontFace(family.ToString(), slant, weight, stretch);
+        }
+
+        /// <summary>
+        /// Try to convert a token that represents a font slant into its enum.
+        /// </summary>
+        /// <param name="token">The token to interpret.</param>
+        /// <param name="slant">The resulting slant.</param>
+        /// <returns>True if it matched any.</returns>
+        public static bool TryParseSlant(string token, out FontSlant slant)
+        {
+            switch (token.ToLower())
+            {
+                case "italic":
+                    slant = FontSlant.Italic;
+                    return true;
+                case "oblique":
+                    slant = FontSlant.Oblique;
+                    return true;
+                default:
+                    slant = FontSlant.Normal;
+                    return false;
+            }
+        }
+
+        /// <summary>
+        /// Try to convert a token that represents a font weight into its enum.
+        /// </summary>
+        /// <param name="token">The token to interpret.</param>
+        /// <param name="weight">The resulting weight.</param>
+        /// <returns>True if it matched any.</returns>
+        public static bool TryParseWeight(string token, out FontWeight weight)
+        {
+            switch (token.ToLower())
+            {
+                case "thin":
+                    weight = FontWeight.Thin;
+                    return true;
+                case "extralight":
+                case "ultralight":
+                    weight = FontWeight._200;
+                    return true;
+                case "light":
+                case "demilight":
+                case "semilight":
+                    weight = FontWeight._300;
+                    return true;
+                case "demibold":
+                case "semibold":
+                    weight = FontWeight._600;
+                    return true;
+                case "bold":
+                    weight = FontWeight._700;
+                    return true;
+                case "extrabold":
+                case "ultrabold":
+                    weight = FontWeight._800;
+                    return true;
+                case "heavy":
+                case "extrablack":
+                case "black":
+                case "ultrablack":
+                    weight = FontWeight._900;
+                    return true;
+                default:
+                    weight = FontWeight.Normal;
+                    return false;
+            }
+        }
+
+        /// <summary>
+        /// Try to convert a token that represents a font stretch into its enum.
+        /// </summary>
+        /// <param name="token">The token to interpret.</param>
+        /// <param name="stretch">The resulting stretch.</param>
+        /// <returns>True if it matched any.</returns>
+        public static bool TryParseStretch(string token, out FontStretch stretch)
+        {
+            switch (token.ToLower())
+            {
+                case "ultracondensed":
+                    stretch = FontStretch.UltraCondensed;
+                    return true;
+                case "extracondensed":
+                    stretch = FontStretch.ExtraCondensed;
+                    return true;
+                case "condensed":
+                    stretch = FontStretch.Condensed;
+                    return true;
+                case "semicondensed":
+                case "demicondensed":
+                    stretch = FontStretch.SemiCondensed;
+                    return true;
+                case "semiexpanded":
+                case "demiexpanded":
+                    stretch = FontStretch.SemiExpanded;
+                    return true;
+                case "expanded":
+                    stretch = FontStretch.Expanded;
+                    return true;
+                case "extraexpanded":
+                    stretch = FontStretch.ExtraExpanded;
+                    return true;
+                case "ultraexpanded":
+                    stretch = FontStretch.UltraExpanded;
+                    return true;
+                default:
+                    stretch = FontStretch.Normal;
+                    return false;
+            }
+        }
+    }
+}

Quik/Media/Font/FontSlant.cs

@@ -0,0 +1,9 @@
+namespace Quik.Media.Font
+{
+    public enum FontSlant
+    {
+        Normal = 0,
+        Italic = 1,
+        Oblique = 2,
+    }
+}

Quik/Media/Font/FontStretch.cs

@@ -0,0 +1,18 @@
+namespace Quik.Media.Font
+{
+    /// <summary>
+    /// Enumeration of font stretch values.
+    /// </summary>
+    public enum FontStretch
+    {
+        UltraCondensed = 500,
+        ExtraCondensed = 625,
+        Condensed = 750,
+        SemiCondensed = 875,
+        Normal = 1000,
+        SemiExpanded = 1125,
+        Expanded = 1250,
+        ExtraExpanded = 1500,
+        UltraExpanded = 2000,
+    }
+}

Quik/Media/Font/FontWeight.cs

@@ -0,0 +1,22 @@
+using System;
+
+namespace Quik.Media.Font
+{
+    public enum FontWeight
+    {
+        _100 = 100,
+        _200 = 200,
+        _300 = 300,
+        _400 = 400,
+        _500 = 500,
+        _600 = 600,
+        _700 = 700,
+        _800 = 800,
+        _900 = 900,
+
+        Thin = _100, 
+        Normal = _400,
+        Bold = _700,
+        Heavy = _900,
+    }
+}

Quik/Media/FontInfo.cs

@@ -1,44 +0,0 @@
-using System;
-
-namespace Quik.Media
-{
-    public struct FontInfo : IEquatable<FontInfo>
-    {
-        public string    Family { get; }
-        public FontStyle Style { get; }
-
-        public override string ToString()
-        {
-            return $"{Family} {Style}";
-        }
-
-        public override int GetHashCode()
-        {
-            return Family.GetHashCode() ^
-                   (Style.GetHashCode() * 3976061);
-        }
-
-        public static bool operator==(FontInfo a, FontInfo b)
-        {
-            return  (a.Style == b.Style)    &&
-                    (a.Family == a.Family);
-        }
-
-        public static bool operator!=(FontInfo a, FontInfo b)
-        {
-            return  (a.Style != b.Style)    ||
-                    (a.Family != b.Family);
-        }
-
-        public bool Equals(FontInfo other)
-        {
-            return this == other;
-        }
-
-        public override bool Equals(object obj)
-        {
-            return  (obj.GetType() == typeof(FontInfo)) &&
-                    this == (FontInfo)obj;
-        }
-    }
-}

Quik/Media/FontStyle.cs

@@ -1,14 +0,0 @@
-using System;
-
-namespace Quik.Media
-{
-    [Flags]
-    public enum FontStyle
-    {
-        Italic = 1 << 0,
-        Bold   = 1 << 1,
-
-        Normal = 0,
-        BoldItalic = Italic | Bold,
-    }
-}

Quik/Media/QFont.cs

@@ -1,4 +1,7 @@
 using System;
+using System.Collections.Generic;
+using Quik.Media;
+using Quik.Media.Font;
 
 namespace Quik.Media
 {
@@ -7,9 +10,11 @@ namespace Quik.Media
     /// </summary>
     public abstract class QFont : IDisposable
     {
-        public abstract FontInfo Info { get; }
-        public string Family => Info.Family;
-        public FontStyle Style => Info.Style;
+        public abstract FontFace Face { get; }
+        public string Family => Face.Family;
+        public FontSlant Slant => Face.Slant;
+        public FontWeight Weight => Face.Weight;
+        public FontStretch Stretch => Face.Stretch;
 
         public abstract bool HasRune(int rune);
         public abstract QFontPage RasterizePage(int codepage, float size, in FontRasterizerOptions options);

Quik/Media/QGlyphMetrics.cs

@@ -10,11 +10,6 @@ namespace Quik.Media
         /// </summary>
         public int Rune { get; }
 
-        // /// <summary>
-        // /// Location of the glyph on the atlas.
-        // /// </summary>
-        // public QRectangle Location { get; }
-
         /// <summary>
         /// Size of the glyph in units.
         /// </summary>
@@ -37,14 +32,12 @@ namespace Quik.Media
 
         public QGlyphMetrics(
             int character,
-            // QRectangle location,
             QVec2 size,
             QVec2 horizontalBearing,
             QVec2 verticalBearing,
             QVec2 advance)
         {
             Rune = character;
-            // Location = location;
             Size = size;
             HorizontalBearing = horizontalBearing;
             VerticalBearing = verticalBearing;

Quik/PAL/IFontDatabase.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using Quik.Media.Font;
+
+namespace Quik.PAL
+{
+    /// <summary>
+    /// Flags that effect font search criterea.
+    /// </summary>
+    [Flags]
+    public enum FontMatchCriteria
+    {
+        None = 0,
+        Family = 1 << 0,
+        Slant = 1 << 1,
+        Weight = 1 << 2,
+        Stretch = 1 << 3,
+        All = Family | Slant | Weight | Stretch,
+    }
+
+    /// <summary>
+    /// An abstraction over the system font database.
+    /// </summary>
+    public interface IFontDataBase
+    {
+        /// <summary>
+        /// All the fonts installed in the system.
+        /// </summary>
+        IEnumerable<FontFace> All { get; }
+
+        /// <summary>
+        /// Search for the given font face.
+        /// </summary>
+        /// <param name="prototype">The font face prototype.</param>
+        /// <param name="criteria">The match criteria</param>
+        /// <returns>A list of fonts sorted by the closest match first.</returns>
+        IEnumerable<FontFace> Search(FontFace prototype, FontMatchCriteria criteria = FontMatchCriteria.All);
+
+        /// <summary>
+        /// Get the font face file info if it exists.
+        /// </summary>
+        /// <param name="face">The face to look for.</param>
+        /// <returns>The file info if it exists.</returns>
+        FileInfo FontFileInfo(FontFace face);
+
+        /// <summary>
+        /// Open a font face.
+        /// </summary>
+        /// <param name="face">The font face to open.</param>
+        /// <returns>The stream to the font face.</returns>
+        Stream Open(FontFace face);
+    }
+}

Quik/QuikStyle.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Collections.Generic;
 using Quik.Media;
-using Quik.Typography;
+using Quik.Media.Font;
 
 namespace Quik
 {
@@ -109,9 +109,9 @@ namespace Quik
             set => this["list-marker-position"] = value;
         }
 
-        public QuikTexture ListMarkerImage
+        public QImage ListMarkerImage
         {
-            get => (QuikTexture)this["list-marker-image"];
+            get => (QImage)this["list-marker-image"];
             set => this["list-marker-image"] = value;
         }
 
@@ -127,9 +127,9 @@ namespace Quik
             set => this["stroke-color"] = value;
         }
 
-        public FontInfo Font
+        public FontFace Font
         {
-            get => (FontInfo)this["font"];
+            get => (FontFace)this["font"];
             set => this["font"] = value;
         }