Update to match changes in Fonts

Author: JimBobSquarePants

src/ImageSharp.Drawing/Processing/Processors/Text/RichTextGlyphRenderer.Brushes.cs

@@ -189,8 +189,8 @@ private static ColorStop[] ToColorStops(ReadOnlySpan<GradientStop> stops, float
     /// <returns>The ImageSharp color.</returns>
     private static Color ToColor(in GlyphColor c, float opacity)
     {
-        float a = Math.Clamp(c.Alpha / 255f * Math.Clamp(opacity, 0f, 1f), 0f, 1f);
+        float a = Math.Clamp(c.A / 255f * Math.Clamp(opacity, 0f, 1f), 0f, 1f);
         byte aa = (byte)MathF.Round(a * 255f);
-        return Color.FromPixel(new Rgba32(c.Red, c.Green, c.Blue, aa));
+        return Color.FromPixel(new Rgba32(c.R, c.G, c.B, aa));
     }
 }

src/ImageSharp.Drawing/Shapes/Text/BaseGlyphBuilder.cs

@@ -278,18 +278,19 @@ void IGlyphRenderer.SetDecoration(TextDecorations textDecorations, Vector2 start
             }
 
             // Align the new line with the previous one if they are close enough.
+            // Use a 2 pixel threshold to account for anti-aliasing gaps.
             if (rotated)
             {
                 if (thickness == prevThickness
-                && prevEnd.Y + 1 >= start.Y
+                && prevEnd.Y + 2 >= start.Y
                 && prevEnd.X == start.X)
                 {
                     start = prevEnd;
                 }
             }
             else if (thickness == prevThickness
                  && prevEnd.Y == start.Y
-                 && prevEnd.X + 1 >= start.X)
+                 && prevEnd.X + 2 >= start.X)
             {
                 start = prevEnd;
             }