diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/include/effects/SkLayerRasterizer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/include/effects/SkLayerRasterizer.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,92 @@
+
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#ifndef SkLayerRasterizer_DEFINED
+#define SkLayerRasterizer_DEFINED
+
+#include "SkRasterizer.h"
+#include "SkDeque.h"
+#include "SkScalar.h"
+
+class SkPaint;
+
+class SK_API SkLayerRasterizer : public SkRasterizer {
+public:
+    virtual ~SkLayerRasterizer();
+
+    class SK_API Builder {
+    public:
+        Builder();
+        ~Builder();
+
+        void addLayer(const SkPaint& paint) {
+            this->addLayer(paint, 0, 0);
+        }
+
+        /**
+          *  Add a new layer (above any previous layers) to the rasterizer.
+          *  The layer will extract those fields that affect the mask from
+          *  the specified paint, but will not retain a reference to the paint
+          *  object itself, so it may be reused without danger of side-effects.
+          */
+        void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy);
+
+        /**
+          *  Pass queue of layers on to newly created layer rasterizer and return it. The builder
+          *  cannot be used any more after calling this function.
+          */
+        SkLayerRasterizer* detachRasterizer();
+
+    private:
+        SkDeque* fLayers;
+    };
+
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+    void addLayer(const SkPaint& paint) {
+        this->addLayer(paint, 0, 0);
+    }
+
+    /**    Add a new layer (above any previous layers) to the rasterizer.
+        The layer will extract those fields that affect the mask from
+        the specified paint, but will not retain a reference to the paint
+        object itself, so it may be reused without danger of side-effects.
+    */
+    void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy);
+#endif
+
+    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLayerRasterizer)
+
+protected:
+    SkLayerRasterizer(SkDeque* layers);
+    SkLayerRasterizer(SkReadBuffer&);
+    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
+
+    // override from SkRasterizer
+    virtual bool onRasterize(const SkPath& path, const SkMatrix& matrix,
+                             const SkIRect* clipBounds,
+                             SkMask* mask, SkMask::CreateMode mode) const;
+
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+public:
+#endif
+    SkLayerRasterizer();
+
+private:
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+    SkDeque* fLayers;
+#else
+    const SkDeque* const fLayers;
+#endif
+
+    static SkDeque* ReadLayers(SkReadBuffer& buffer);
+
+    typedef SkRasterizer INHERITED;
+};
+
+#endif