qtbase: Fix duplicate symbol errors in static build on Mac

There is some code duplication between QMacStyle anf the Cocoa QPA
plugin regarding painting and bridging with Cocoa.

Task-number: QTBUG-29725
Change-Id: I347407a9bca47b6fccd77fb924688bd35135d96b
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>
(cherry picked from commit 5f948eb62ddb9f429f46ade08f32072212cda493)
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Reviewed-by: Andy Shaw <andy.shaw@digia.com>

src/plugins/platforms/cocoa/qcocoahelpers.mm

@@ -466,10 +466,9 @@ QString qt_mac_removeMnemonics(const QString &original)
     return returnText;
 }
 
-
+static CGColorSpaceRef m_genericColorSpace = 0;
-CGColorSpaceRef m_genericColorSpace = 0;
+static QHash<CGDirectDisplayID, CGColorSpaceRef> m_displayColorSpaceHash;
-QHash<CGDirectDisplayID, CGColorSpaceRef> m_displayColorSpaceHash;
+static bool m_postRoutineRegistered = false;
-bool m_postRoutineRegistered = false;
 
 CGColorSpaceRef qt_mac_genericColorSpace()
 {

src/plugins/platforms/cocoa/qpaintengine_mac.mm

@@ -76,7 +76,7 @@ QT_BEGIN_NAMESPACE
   QCoreGraphicsPaintEngine utility functions
  *****************************************************************************/
 
-void qt_mac_clip_cg(CGContextRef hd, const QRegion &rgn, CGAffineTransform *orig_xform)
+static void qt_mac_clip_cg(CGContextRef hd, const QRegion &rgn, CGAffineTransform *orig_xform)
 {
     CGAffineTransform old_xform = CGAffineTransformIdentity;
     if (orig_xform) { //setup xforms

src/widgets/styles/qmacstyle_mac.mm

@@ -458,6 +458,9 @@ static QString qt_mac_removeMnemonics(const QString &original)
     return returnText;
 }
 
+static CGContextRef qt_mac_cg_context(const QPaintDevice *pdev);
+
+namespace {
 class QMacCGContext
 {
     CGContextRef context;
@@ -465,7 +468,6 @@ public:
     QMacCGContext(QPainter *p);
     inline QMacCGContext() { context = 0; }
     inline QMacCGContext(const QPaintDevice *pdev) {
-        extern CGContextRef qt_mac_cg_context(const QPaintDevice *);
         context = qt_mac_cg_context(pdev);
     }
     inline QMacCGContext(CGContextRef cg, bool takeOwnership=false) {
@@ -495,6 +497,7 @@ public:
         return *this;
     }
 };
+} // anonymous namespace
 
 static QColor qcolorFromCGColor(CGColorRef cgcolor)
 {
@@ -578,11 +581,11 @@ QRegion qt_mac_fromHIShapeRef(HIShapeRef shape)
 }
 
 CGColorSpaceRef m_genericColorSpace = 0;
-QHash<CGDirectDisplayID, CGColorSpaceRef> m_displayColorSpaceHash;
+static QHash<CGDirectDisplayID, CGColorSpaceRef> m_displayColorSpaceHash;
 bool m_postRoutineRegistered = false;
 
-CGColorSpaceRef qt_mac_displayColorSpace(const QWidget *widget);
+static CGColorSpaceRef qt_mac_displayColorSpace(const QWidget *widget);
-CGColorSpaceRef qt_mac_genericColorSpace()
+static CGColorSpaceRef qt_mac_genericColorSpace()
 {
 #if 0
     if (!m_genericColorSpace) {
@@ -606,11 +609,26 @@ CGColorSpaceRef qt_mac_genericColorSpace()
 #endif
 }
 
+static void qt_mac_cleanUpMacColorSpaces()
+{
+    if (m_genericColorSpace) {
+        CFRelease(m_genericColorSpace);
+        m_genericColorSpace = 0;
+    }
+    QHash<CGDirectDisplayID, CGColorSpaceRef>::const_iterator it = m_displayColorSpaceHash.constBegin();
+    while (it != m_displayColorSpaceHash.constEnd()) {
+        if (it.value())
+            CFRelease(it.value());
+        ++it;
+    }
+    m_displayColorSpaceHash.clear();
+}
+
 /*
     Ideally, we should pass the widget in here, and use CGGetDisplaysWithRect() etc.
     to support multiple displays correctly.
 */
-CGColorSpaceRef qt_mac_displayColorSpace(const QWidget *widget)
+static CGColorSpaceRef qt_mac_displayColorSpace(const QWidget *widget)
 {
     CGColorSpaceRef colorSpace;
 
@@ -639,27 +657,11 @@ CGColorSpaceRef qt_mac_displayColorSpace(const QWidget *widget)
     m_displayColorSpaceHash.insert(displayID, colorSpace);
     if (!m_postRoutineRegistered) {
         m_postRoutineRegistered = true;
-        void qt_mac_cleanUpMacColorSpaces();
         qAddPostRoutine(qt_mac_cleanUpMacColorSpaces);
     }
     return colorSpace;
 }
 
-void qt_mac_cleanUpMacColorSpaces()
-{
-    if (m_genericColorSpace) {
-        CFRelease(m_genericColorSpace);
-        m_genericColorSpace = 0;
-    }
-    QHash<CGDirectDisplayID, CGColorSpaceRef>::const_iterator it = m_displayColorSpaceHash.constBegin();
-    while (it != m_displayColorSpaceHash.constEnd()) {
-        if (it.value())
-            CFRelease(it.value());
-        ++it;
-    }
-    m_displayColorSpaceHash.clear();
-}
-
 bool qt_macWindowIsTextured(const QWidget *window)
 {
     NSWindow *nswindow = static_cast<NSWindow*>(
@@ -6489,7 +6491,7 @@ int QMacStyle::layoutSpacing(QSizePolicy::ControlType control1,
     return_SIZE(10, 8, 6);  // guess
 }
 
-void qt_mac_clip_cg(CGContextRef hd, const QRegion &rgn, CGAffineTransform *orig_xform)
+static void qt_mac_clip_cg(CGContextRef hd, const QRegion &rgn, CGAffineTransform *orig_xform)
 {
     CGAffineTransform old_xform = CGAffineTransformIdentity;
     if (orig_xform) { //setup xforms
@@ -6530,6 +6532,9 @@ void qt_mac_scale_region(QRegion *region, qreal scaleFactor)
     region->setRects(&scaledRects[0], scaledRects.count());
 }
 
+static CGColorSpaceRef qt_mac_colorSpaceForDeviceType(const QPaintDevice *paintDevice);
+
+namespace {
 QMacCGContext::QMacCGContext(QPainter *p)
 {
     QPaintEngine *pe = p->paintEngine();
@@ -6542,7 +6547,6 @@ QMacCGContext::QMacCGContext(QPainter *p)
                 devType == QInternal::Pixmap ||
                 devType == QInternal::Image)) {
 
-        extern CGColorSpaceRef qt_mac_colorSpaceForDeviceType(const QPaintDevice *paintDevice);
         CGColorSpaceRef colorspace = qt_mac_colorSpaceForDeviceType(pe->paintDevice());
         uint flags = kCGImageAlphaPremultipliedFirst;
         flags |= kCGBitmapByteOrder32Host;
@@ -6584,7 +6588,9 @@ QMacCGContext::QMacCGContext(QPainter *p)
     }
 }
 
-CGColorSpaceRef qt_mac_colorSpaceForDeviceType(const QPaintDevice *paintDevice)
+} // anonymous namespace
+
+static CGColorSpaceRef qt_mac_colorSpaceForDeviceType(const QPaintDevice *paintDevice)
 {
     bool isWidget = (paintDevice->devType() == QInternal::Widget);
     return qt_mac_displayColorSpace(isWidget ? static_cast<const QWidget *>(paintDevice) : 0);