make SkDeviceFactory reference counted

git-svn-id: http://skia.googlecode.com/svn/trunk@1180 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 5 insertions, 2 deletions

diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 6b2ee10e75..b1222eb874 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -126,12 +126,15 @@ public:
     SkDevice* setBitmapDevice(const SkBitmap& bitmap, bool forLayer = false);
 
     /**
-     *  Return the current device factory, or NULL.
+     *  Return the current device factory, or NULL. The reference count of
+     *  the returned factory is not changed.
      */
     SkDeviceFactory* getDeviceFactory() const { return fDeviceFactory; }
 
     /**
-     *  Replace any existing factory with the specified factory.
+     *  Replace any existing factory with the specified factory, unrefing the
+     *  previous (if any), and refing the new one (if any). For convenience,
+     *  the factory parameter is also returned.
      */
     SkDeviceFactory* setDeviceFactory(SkDeviceFactory*);