From 501c510cc3cb6215aed27af7599395480a049667 Mon Sep 17 00:00:00 2001
From: Allan Sandfeld Jensen <allan.jensen@digia.com>
Date: Tue, 11 Nov 2014 13:48:27 +0100
Subject: [PATCH 009/131] Do not apply subpixel gamma-correction on XCB
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

To match rendering of subpixel antialiased text in Qt 4.8 and other
toolkits on X11, we should not apply gamma-correction. This also
makes the rendering of subpixel antialiased text closer to normal
antialiased text.

Task-number: QTBUG-41590
Change-Id: I45ad3448334951353657b878d002eea429858f2d
Reviewed-by: Samuel Rødal <srodal@gmail.com>
Reviewed-by: Sérgio Martins <sergio.martins@kdab.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
---
 src/plugins/platforms/xcb/qxcbintegration.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/plugins/platforms/xcb/qxcbintegration.cpp b/src/plugins/platforms/xcb/qxcbintegration.cpp
index cace087..3818494 100644
--- a/src/plugins/platforms/xcb/qxcbintegration.cpp
+++ b/src/plugins/platforms/xcb/qxcbintegration.cpp
@@ -427,12 +427,14 @@ QVariant QXcbIntegration::styleHint(QPlatformIntegration::StyleHint hint) const
     case QPlatformIntegration::StartDragTime:
     case QPlatformIntegration::KeyboardAutoRepeatRate:
     case QPlatformIntegration::PasswordMaskDelay:
-    case QPlatformIntegration::FontSmoothingGamma:
     case QPlatformIntegration::StartDragVelocity:
     case QPlatformIntegration::UseRtlExtensions:
     case QPlatformIntegration::PasswordMaskCharacter:
         // TODO using various xcb, gnome or KDE settings
         break; // Not implemented, use defaults
+    case QPlatformIntegration::FontSmoothingGamma:
+        // Match Qt 4.8 text rendering, and rendering of other X11 toolkits.
+        return qreal(1.0);
     case QPlatformIntegration::StartDragDistance: {
         // The default (in QPlatformTheme::defaultThemeHint) is 10 pixels, but
         // on a high-resolution screen it makes sense to increase it.
-- 
1.9.3