Fix medium hinting on Linux with fontconfig and freetype

Skia freetype will enforce slight hinting in SkTypeface_FreeType::onFilterRec
when subpixel positioning is enabled. To avoid overriding medium hinting
with slight, we should not enable subpixel positioning for medium hinting
similar to how it is avoided for full hinting as well.

Change-Id: I4a229cf2b8827c11f33789d1c35c2d0eaeaed0ae
Reviewed-by: Michael Brüning <michael.bruning@qt.io>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/chromium/third_party/blink/renderer/platform/fonts/web_font_render_style.cc b/chromium/third_party/blink/renderer/platform/fonts/web_font_render_style.cc
index a8b68cd62f5..e5e75471249 100644
--- a/chromium/third_party/blink/renderer/platform/fonts/web_font_render_style.cc
+++ b/chromium/third_party/blink/renderer/platform/fonts/web_font_render_style.cc
@@ -110,11 +110,11 @@ void WebFontRenderStyle::ApplyToSkFont(SkFont* font,
     font->setEdging(SkFont::Edging::kAlias);
   }
 
-  // Force-enable subpixel positioning, except when full hinting is requested on
-  // low-dpi screen or when running web tests.
+  // Force-enable subpixel positioning, except when normal or full hinting is
+  // requested on low-dpi screen or when running web tests.
   bool force_subpixel_positioning =
       !WebTestSupport::IsRunningWebTest() &&
-      (sk_hint_style != SkFontHinting::kFull || device_scale_factor > 1.0f);
+      (sk_hint_style < SkFontHinting::kNormal || device_scale_factor > 1.0f);
 
   font->setSubpixel(force_subpixel_positioning || use_subpixel_positioning);