Improved Pinch-Zoom for PDF

pdf/paint_manager.h

Index: pdf/paint_manager.h
diff --git a/pdf/paint_manager.h b/pdf/paint_manager.h
index d7f7e3f594b8685bbf84cc18b012eb0789f14b28..903bcb315c58348083b3919aee99d6de6d7fd688 100644
--- a/pdf/paint_manager.h
+++ b/pdf/paint_manager.h
@@ -144,7 +144,14 @@ class PaintManager {
   pp::Size GetEffectiveSize() const;
   float GetEffectiveDeviceScale() const;
 
+  // Set the transform for the graphics layer.
+  void SetTransform(float scale, pp::Point Origin, pp::Point Transform);
+  void SetTransform(float scale);
  private:
+  //Coalesce transforms if Flush is busy
+  float scale_;
+  pp::Point origin_, transform_;
+
   // Disallow copy and assign (these are unimplemented).
   PaintManager(const PaintManager&);
   PaintManager& operator=(const PaintManager&);
@@ -183,6 +190,7 @@ class PaintManager {
   // See comment for EnsureCallbackPending for more on how these work.
   bool manual_callback_pending_;
   bool flush_pending_;
+  bool flush_requested_;
 
   // When we get a resize, we don't bind right away (see SetSize). The
   // has_pending_resize_ tells us that we need to do a resize for the next