Add a switch to invert web contents (non-accel only).

The switch will just be used during development of this feature.
The idea is for this to be turned automatically for Windows users
who enable an inverted (white-on-black) color scheme - see bug
for detail.

This first patch only handles the non-accelerated graphics path;
a subsequent change will handle the accelerated path.

BUG=112944
TEST=manually test with --invert-web-contents switch

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=120928

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=121541

Review URL: https://chromiumcodereview.appspot.com/9353012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@121715 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 7 insertions, 0 deletions

diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index c1f53cd..d1968e0 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -233,6 +233,7 @@ class CONTENT_EXPORT RenderWidget
   void OnMsgRepaint(const gfx::Size& size_to_paint);
   void OnSetTextDirection(WebKit::WebTextDirection direction);
   void OnGetFPS();
+  void OnInvertWebContent(bool invert);
 
   // Override points to notify derived classes that a paint has happened.
   // WillInitiatePaint happens when we're about to generate a new bitmap and
@@ -495,6 +496,12 @@ class CONTENT_EXPORT RenderWidget
   // case NULL is added to the queue.
   std::deque<ViewHostMsg_UpdateRect*> updates_pending_swap_;
 
+  // Set to true if we should invert all pixels.
+  bool invert_;
+
+  // The Skia paint object for inverting.
+  scoped_ptr<SkPaint> invert_paint_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };