Set maximum output size for scaled-image-cache images

include/core/SkGraphics.h

Index: include/core/SkGraphics.h
diff --git a/include/core/SkGraphics.h b/include/core/SkGraphics.h
index 2667a388d2bbb66a7081fe18bb053328fbdc9266..e7865ca5afb4c393af54fc0bfa8fb7a22392e3e3 100644
--- a/include/core/SkGraphics.h
+++ b/include/core/SkGraphics.h
@@ -79,9 +79,47 @@ public:
      */
     static void PurgeFontCache();
 
-    static size_t GetImageCacheBytesUsed();
-    static size_t GetImageCacheByteLimit();
-    static size_t SetImageCacheByteLimit(size_t newLimit);
+    /**
+     *  Scaling bitmaps with the SkPaint::kHigh_FilterLevel setting is
+     *  expensive, so the result is saved in the global Scaled Image
+     *  Cache.
+     *
+     *  This function returns the memory usage of the Scaled Image Cache.
+     */
+    static size_t GetImageCacheTotalBytesUsed();
+    /**
+     *  These functions get/set the memory usage limit for the Scaled
+     *  Image Cache.  Bitmaps are purged from the cache when the
+     *  memory useage exceeds this limit.
+     */
+    static size_t GetImageCacheTotalByteLimit();
+    static size_t SetImageCacheTotalByteLimit(size_t newLimit);
+
+    // DEPRECATED
+    static size_t GetImageCacheBytesUsed() {
+        return GetImageCacheTotalBytesUsed();
+    }
+    // DEPRECATED
+    static size_t GetImageCacheByteLimit() {
+        return GetImageCacheTotalByteLimit();
+    }
+    // DEPRECATED
+    static size_t SetImageCacheByteLimit(size_t newLimit) {
+        return SetImageCacheTotalByteLimit(newLimit);
+    }
+
+    /**
+     *  Scaling bitmaps with the SkPaint::kHigh_FilterLevel setting is
+     *  expensive, so the result is saved in the global Scaled Image
+     *  Cache.  When the resulting bitmap is too large, this can
+     *  overload the cache.  If the ImageCacheSingleAllocationByteLimit
+     *  is set to a non-zero number, and the resulting bitmap would be
+     *  larger than that value, the bitmap scaling algorithm falls
+     *  back onto a cheaper algorithm and does not cache the result.
+     *  Zero is the default value.
+     */
+    static size_t GetImageCacheSingleAllocationByteLimit();
+    static size_t SetImageCacheSingleAllocationByteLimit(size_t newLimit);
 
     /**
      *  Applications with command line options may pass optional state, such