SkImage method for detecting lazy decoding

include/core/SkImage.h

Index: include/core/SkImage.h
diff --git a/include/core/SkImage.h b/include/core/SkImage.h
index 2a62135bdb303ccdfaa852707a50b082fa324b40..5c29d215bb59c20f30e253e133b48b0ee1f71baa 100644
--- a/include/core/SkImage.h
+++ b/include/core/SkImage.h
@@ -288,6 +288,12 @@ public:
      */
     bool asLegacyBitmap(SkBitmap*, LegacyBitmapMode) const;
     
+    /**
+     *  Returns true if the image is backed by a pixel ref which generates pixels on-the-fly

[reed1, 2015/08/20 15:27:50]

... backed by an image-generator or other src that creates (and caches) its
pixels / texture on-demand.

[f(malita), 2015/08/20 15:38:37]

Done.

+     *  (when required).
+     */
+    bool isLazyGenerated() const;
+
 protected:
     SkImage(int width, int height, uint32_t uniqueID);