Initial SVG model

experimental/svg/model/SkSVGTransformableNode.h

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkSVGTransformableNode_DEFINED
+#define SkSVGTransformableNode_DEFINED
+
+#include "SkMatrix.h"
+#include "SkSVGNode.h"
+
+class SkSVGTransformableNode : public SkSVGNode {
+public:
+    virtual ~SkSVGTransformableNode() = default;
+
+    void setTransform(const SkMatrix& m) { fMatrix = m; }
+
+protected:
+    SkSVGTransformableNode(SkSVGTag);
+
+    void onSetAttribute(SkSVGAttribute, const SkSVGValue&) override;
+
+    const SkMatrix& onLocalMatrix() const override { return fMatrix; }
+
+private:
+    // FIXME: should be sparse
+    SkMatrix fMatrix;
+
+    typedef SkSVGNode INHERITED;
+};
+
+#endif // SkSVGTransformableNode_DEFINED