Fix image format use in cocoa plugin

The screen should be opaque. It is used to create the
default pixmap data which should be RGB32 on mac.

The backing store uses premultiplied in the resize but
initializes with non premultiplied. Unify this to all
premultiplied

Change-Id: I7d17d492fcff30b555a768da852ff9be0a9d96aa
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoabackingstore.mm b/src/plugins/platforms/cocoa/qcocoabackingstore.mm
index 5a59fb5c49..0cde19644e 100644
--- a/src/plugins/platforms/cocoa/qcocoabackingstore.mm
+++ b/src/plugins/platforms/cocoa/qcocoabackingstore.mm
@@ -63,7 +63,7 @@ QCocoaBackingStore::QCocoaBackingStore(QWindow *window)
     const QRect geo = window->geometry();
     NSRect rect = NSMakeRect(geo.x(),geo.y(),geo.width(),geo.height());
 
-    m_image = new QImage(window->geometry().size(),QImage::Format_ARGB32);
+    m_image = new QImage(window->geometry().size(),QImage::Format_ARGB32_Premultiplied);
 }
 
 QCocoaBackingStore::~QCocoaBackingStore()
diff --git a/src/plugins/platforms/cocoa/qcocoaintegration.mm b/src/plugins/platforms/cocoa/qcocoaintegration.mm
index 353ed0f4f0..445f67f1e7 100644
--- a/src/plugins/platforms/cocoa/qcocoaintegration.mm
+++ b/src/plugins/platforms/cocoa/qcocoaintegration.mm
@@ -70,7 +70,7 @@ QCocoaScreen::QCocoaScreen(int screenIndex)
     NSRect rect = [m_screen frame];
     m_geometry = QRect(rect.origin.x,rect.origin.y,rect.size.width,rect.size.height);
 
-    m_format = QImage::Format_ARGB32;
+    m_format = QImage::Format_RGB32;
 
     m_depth = NSBitsPerPixelFromDepth([m_screen depth]);