Don't draw when clip is zero.

In full screen mode, framework still need to call drawGL for now.
But we can early return in this case.

bug:6477718
Change-Id: I02194f5739d6ae055b1cf14fbf9479b7bb8ebe52

1 files changed, 5 insertions, 5 deletions

diff --git a/Source/WebKit/android/nav/WebView.cpp b/Source/WebKit/android/nav/WebView.cpp
index a78392b..59901ff 100644
--- a/Source/WebKit/android/nav/WebView.cpp
+++ b/Source/WebKit/android/nav/WebView.cpp
@@ -698,11 +698,6 @@ class GLDrawFunctor : Functor {
         if (shouldDraw)
             wvInstance->updateRectsForGL();
 
-        if (invScreenRect.isEmpty()) {
-            // NOOP operation if viewport is empty
-            return 0;
-        }
-
         WebCore::IntRect inval;
         int titlebarHeight = screenRect.height() - invScreenRect.height();
 
@@ -711,6 +706,11 @@ class GLDrawFunctor : Functor {
                                     info->clipRight - info->clipLeft,
                                     info->clipBottom - info->clipTop);
 
+        if (invScreenRect.isEmpty() || screenClip.isEmpty()) {
+            // NOOP operation if screenRect or clip is empty
+            return 0;
+        }
+
         WebCore::IntRect localInvScreenRect = invScreenRect;
         if (info->isLayer) {
             // When webview is on a layer, we need to use the viewport relative