[Impeller] Make text appear less emboldened (#39383)

Author: bdero

impeller/typographer/backends/skia/text_frame_skia.cc

@@ -29,6 +29,7 @@ static Font ToFont(const SkTextBlobRunIterator& run, Scalar scale) {
   metrics.point_size = font.getSize();
   metrics.embolden = font.isEmbolden();
   metrics.skewX = font.getSkewX();
+  metrics.scaleX = font.getScaleX();
 
   return Font{std::move(typeface), metrics};
 }

impeller/typographer/backends/skia/text_render_context_skia.cc

@@ -272,22 +272,23 @@ static std::shared_ptr<SkBitmap> CreateAtlasBitmap(const GlyphAtlas& atlas,
     return nullptr;
   }
 
-  atlas.IterateGlyphs([canvas](const FontGlyphPair& font_glyph,
-                               const Rect& location) -> bool {
+  bool has_color = atlas.GetType() == GlyphAtlas::Type::kColorBitmap;
+
+  atlas.IterateGlyphs([canvas, has_color](const FontGlyphPair& font_glyph,
+                                          const Rect& location) -> bool {
     const auto& metrics = font_glyph.font.GetMetrics();
     const auto position = SkPoint::Make(location.origin.x / metrics.scale,
                                         location.origin.y / metrics.scale);
     SkGlyphID glyph_id = font_glyph.glyph.index;
 
     SkFont sk_font(
         TypefaceSkia::Cast(*font_glyph.font.GetTypeface()).GetSkiaTypeface(),
-        metrics.point_size);
+        metrics.point_size, metrics.scaleX, metrics.skewX);
     sk_font.setEdging(SkFont::Edging::kAntiAlias);
     sk_font.setHinting(SkFontHinting::kSlight);
     sk_font.setEmbolden(metrics.embolden);
-    sk_font.setSkewX(metrics.skewX);
 
-    auto glyph_color = SK_ColorWHITE;
+    auto glyph_color = has_color ? SK_ColorWHITE : SK_ColorBLACK;
 
     SkPaint glyph_paint;
     glyph_paint.setColor(glyph_color);

impeller/typographer/font.h

@@ -41,10 +41,11 @@ class Font : public Comparable<Font> {
     Scalar point_size = 12.0f;
     bool embolden = false;
     Scalar skewX = 0.0f;
+    Scalar scaleX = 1.0f;
 
     constexpr bool operator==(const Metrics& o) const {
       return scale == o.scale && point_size == o.point_size &&
-             embolden == o.embolden && skewX == o.skewX;
+             embolden == o.embolden && skewX == o.skewX && scaleX == o.scaleX;
     }
   };