[SVGDom] Initial SVGLength support

Mostly plumb new length types, but also introduce a stateful parser,
rect shape and named color support.

R=reed@google.com,robertphillips@google.com,stephana@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2202053002

Review-Url: https://codereview.chromium.org/2202053002

1 files changed, 33 insertions, 0 deletions

diff --git a/experimental/svg/model/SkSVGShape.h b/experimental/svg/model/SkSVGShape.h
new file mode 100644
index 0000000000..2b3ea96d54
--- /dev/null
+++ b/experimental/svg/model/SkSVGShape.h
@@ -0,0 +1,33 @@
+/*
+ * 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 SkSVGShape_DEFINED
+#define SkSVGShape_DEFINED
+
+#include "SkSVGTransformableNode.h"
+
+class SkSVGLengthContext;
+class SkPaint;
+
+class SkSVGShape : public SkSVGTransformableNode {
+public:
+    virtual ~SkSVGShape() = default;
+
+    void appendChild(sk_sp<SkSVGNode>) override;
+
+protected:
+    SkSVGShape(SkSVGTag);
+
+    void onRender(SkCanvas*, const SkSVGRenderContext&) const final;
+
+    virtual void onDraw(SkCanvas*, const SkSVGLengthContext&, const SkPaint&) const = 0;
+
+private:
+    typedef SkSVGTransformableNode INHERITED;
+};
+
+#endif // SkSVGShape_DEFINED