Separate glyph/paint transforms; SVG caching & tests

.github/workflows/build-and-test.yml

@@ -10,7 +10,7 @@ on:
     branches:
       - main
       - release/*
-    types: [ labeled, opened, synchronize, reopened ]
+    types: [ opened, synchronize, reopened ]
 jobs:
   # Prime a single LFS cache and expose the exact key for the matrix
   WarmLFS:

src/SixLabors.Fonts/StreamFontMetrics.Cff.cs

@@ -163,7 +163,7 @@ private GlyphMetrics CreateCffGlyphMetrics(
                 this,
                 glyphId,
                 codePoint,
-                new SvgGlyphSource(svg),
+                this.GetOrCreateSvgGlyphSource(svg),
                 bounds,
                 advanceWidth,
                 advancedHeight,

src/SixLabors.Fonts/StreamFontMetrics.TrueType.cs

@@ -281,7 +281,7 @@ private GlyphMetrics CreateTrueTypeGlyphMetrics(
                 this,
                 glyphId,
                 codePoint,
-                new SvgGlyphSource(svg),
+                this.GetOrCreateSvgGlyphSource(svg),
                 bounds,
                 advanceWidth,
                 advancedHeight,

src/SixLabors.Fonts/StreamFontMetrics.cs

@@ -12,6 +12,7 @@
 using SixLabors.Fonts.Tables.General;
 using SixLabors.Fonts.Tables.General.Kern;
 using SixLabors.Fonts.Tables.General.Post;
+using SixLabors.Fonts.Tables.General.Svg;
 using SixLabors.Fonts.Tables.TrueType;
 using SixLabors.Fonts.Tables.TrueType.Hinting;
 using SixLabors.Fonts.Unicode;
@@ -34,6 +35,7 @@ internal partial class StreamFontMetrics : FontMetrics
     private readonly ConcurrentDictionary<(int CodePoint, ushort Id, TextAttributes Attributes, ColorFontSupport ColorSupport, bool IsVerticalLayout), GlyphMetrics> glyphCache;
     private readonly ConcurrentDictionary<(int CodePoint, int NextCodePoint), (bool Success, ushort GlyphId, bool SkipNextCodePoint)> glyphIdCache;
     private readonly ConcurrentDictionary<ushort, (bool Success, CodePoint CodePoint)> codePointCache;
+    private SvgGlyphSource? svgGlyphSource;
     private readonly FontDescription description;
     private readonly HorizontalMetrics horizontalMetrics;
     private readonly VerticalMetrics verticalMetrics;
@@ -104,7 +106,8 @@ private StreamFontMetrics(
         TrueTypeFontTables tables,
         GlyphVariationProcessor processor,
         ConcurrentDictionary<(int CodePoint, int NextCodePoint), (bool Success, ushort GlyphId, bool SkipNextCodePoint)> sharedGlyphIdCache,
-        ConcurrentDictionary<ushort, (bool Success, CodePoint CodePoint)> sharedCodePointCache)
+        ConcurrentDictionary<ushort, (bool Success, CodePoint CodePoint)> sharedCodePointCache,
+        SvgGlyphSource? svgGlyphSource)
     {
         this.trueTypeFontTables = tables;
         this.outlineType = OutlineType.TrueType;
@@ -113,6 +116,7 @@ private StreamFontMetrics(
         this.glyphIdCache = sharedGlyphIdCache;
         this.codePointCache = sharedCodePointCache;
         this.glyphCache = new();
+        this.svgGlyphSource = svgGlyphSource;
 
         (HorizontalMetrics HorizontalMetrics, VerticalMetrics VerticalMetrics) metrics = this.Initialize(tables);
         this.horizontalMetrics = metrics.HorizontalMetrics;
@@ -130,7 +134,8 @@ private StreamFontMetrics(
         CompactFontTables tables,
         GlyphVariationProcessor processor,
         ConcurrentDictionary<(int CodePoint, int NextCodePoint), (bool Success, ushort GlyphId, bool SkipNextCodePoint)> sharedGlyphIdCache,
-        ConcurrentDictionary<ushort, (bool Success, CodePoint CodePoint)> sharedCodePointCache)
+        ConcurrentDictionary<ushort, (bool Success, CodePoint CodePoint)> sharedCodePointCache,
+        SvgGlyphSource? svgGlyphSource)
     {
         this.compactFontTables = tables;
         this.outlineType = OutlineType.CFF;
@@ -139,6 +144,7 @@ private StreamFontMetrics(
         this.glyphIdCache = sharedGlyphIdCache;
         this.codePointCache = sharedCodePointCache;
         this.glyphCache = new();
+        this.svgGlyphSource = svgGlyphSource;
 
         (HorizontalMetrics HorizontalMetrics, VerticalMetrics VerticalMetrics) metrics = this.Initialize(tables);
         this.horizontalMetrics = metrics.HorizontalMetrics;
@@ -519,7 +525,7 @@ internal StreamFontMetrics CreateVariationInstance(FontVariation[] variations)
                 tables.Cvar,
                 userCoordinates);
 
-            return new StreamFontMetrics(tables, processor, this.glyphIdCache, this.codePointCache);
+            return new StreamFontMetrics(tables, processor, this.glyphIdCache, this.codePointCache, this.svgGlyphSource);
         }
         else
         {
@@ -535,7 +541,7 @@ internal StreamFontMetrics CreateVariationInstance(FontVariation[] variations)
                 tables.MVar,
                 userCoordinates: userCoordinates);
 
-            return new StreamFontMetrics(tables, processor, this.glyphIdCache, this.codePointCache);
+            return new StreamFontMetrics(tables, processor, this.glyphIdCache, this.codePointCache, this.svgGlyphSource);
         }
     }
 
@@ -825,4 +831,7 @@ private GlyphMetrics CreateGlyphMetrics(
             OutlineType.CFF => this.CreateCffGlyphMetrics(in codePoint, glyphId, glyphType, textAttributes, textDecorations, colorSupport, isVerticalLayout, paletteIndex),
             _ => throw new NotSupportedException(),
         };
+
+    private SvgGlyphSource GetOrCreateSvgGlyphSource(SvgTable svgTable)
+        => this.svgGlyphSource ??= new SvgGlyphSource(svgTable);
 }