Introduce FontSmoothingGamma as a platform style hint.

- Allocate gamma tables on the heap in a thread-safe way, use
  font smoothing returned by the style hints of the platform to
  calculate them.
- Improve font rendering on Windows.

Change-Id: I8cd39b51cf03cbd642474c02b9076814baecd597
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformintegration_qpa.cpp b/src/gui/kernel/qplatformintegration_qpa.cpp
index 6879f0517e..4efd2d896f 100644
--- a/src/gui/kernel/qplatformintegration_qpa.cpp
+++ b/src/gui/kernel/qplatformintegration_qpa.cpp
@@ -293,6 +293,8 @@ QVariant QPlatformIntegration::styleHint(StyleHint hint) const
         return false;
     case PasswordMaskDelay:
         return 0;
+    case FontSmoothingGamma:
+        return qreal(1.7);
     }
 
     return 0;