QtOpenGL/plugins/platformsupport: use new QRegion::begin()/end() instead of rect()

Saves e.g. ~900b and ~2900b in text size in QtOpenGL and
XcbQpa libs, resp., on optimized GCC 5.3 Linux AMD64 builds.

Change-Id: Id904689164ca32df41118a23747c70048d8e6604
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

2 files changed, 3 insertions, 4 deletions

diff --git a/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp b/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp
index 97eadb207b..565d46a424 100644
--- a/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp
+++ b/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp
@@ -95,7 +95,7 @@ void QWindowsDirect2DBackingStore::beginPaint(const QRegion &region)
 
     painter.setCompositionMode(QPainter::CompositionMode_Source);
 
-    foreach (const QRect &r, region.rects())
+    for (const QRect &r, region)
         painter.fillRect(r, clear);
 }
 
@@ -127,9 +127,8 @@ void QWindowsDirect2DBackingStore::resize(const QSize &size, const QRegion &regi
     QPixmap *newPixmap = nativeWindow(window())->pixmap();
 
     if (!old.isNull()) {
-        foreach (const QRect &rect, region.rects()) {
+        for (const QRect &rect : region)
             platformPixmap(newPixmap)->copy(old.handle(), rect);
-        }
     }
 }
 
diff --git a/src/plugins/platforms/direct2d/qwindowsdirect2dwindow.cpp b/src/plugins/platforms/direct2d/qwindowsdirect2dwindow.cpp
index 4e677166b2..c750b02078 100644
--- a/src/plugins/platforms/direct2d/qwindowsdirect2dwindow.cpp
+++ b/src/plugins/platforms/direct2d/qwindowsdirect2dwindow.cpp
@@ -122,7 +122,7 @@ void QWindowsDirect2DWindow::flush(QWindowsDirect2DBitmap *bitmap, const QRegion
             QRegion clipped = region;
             clipped &= QRect(QPoint(), size);
 
-            foreach (const QRect &rect, clipped.rects()) {
+            for (const QRect &rect : clipped) {
                 QRectF rectF(rect);
                 dc->DrawBitmap(bitmap->bitmap(),
                                to_d2d_rect_f(rectF),