Tessellating GPU path renderer.

src/gpu/GrTessellatingPathRenderer.h

Index: src/gpu/GrTessellatingPathRenderer.h
diff --git a/src/gpu/GrTessellatingPathRenderer.h b/src/gpu/GrTessellatingPathRenderer.h
new file mode 100644
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+++ b/src/gpu/GrTessellatingPathRenderer.h
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+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrTessellatingPathRenderer_DEFINED
+#define GrTessellatingPathRenderer_DEFINED
+
+#include "GrPathRenderer.h"
+
+/**
+ *  Subclass that renders the path by converting to screen-space trapezoids plus
+ *   extra 1-pixel geometry for AA.
+ */
+class SK_API GrTessellatingPathRenderer : public GrPathRenderer {
+public:
+    GrTessellatingPathRenderer();
+
+    bool canDrawPath(const GrDrawTarget*,
+                     const GrPipelineBuilder*,
+                     const SkMatrix&,
+                     const SkPath&,
+                     const SkStrokeRec&,
+                     bool antiAlias) const SK_OVERRIDE;
+protected:
+
+    StencilSupport onGetStencilSupport(const GrDrawTarget*,
+                                       const GrPipelineBuilder*,
+                                       const SkPath&,
+                                       const SkStrokeRec&) const SK_OVERRIDE;
+
+    bool onDrawPath(GrDrawTarget*,
+                    GrPipelineBuilder*,
+                    GrColor,
+                    const SkMatrix& viewMatrix,
+                    const SkPath&,
+                    const SkStrokeRec&,
+                    bool antiAlias) SK_OVERRIDE;
+
+    typedef GrPathRenderer INHERITED;
+};
+
+#endif