New class to simplify rasterization.

skia/ext/paint_simplifier.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SKIA_EXT_PAINT_SIMPLIFIER_H
+#define SKIA_EXT_PAINT_SIMPLIFIER_H
+
+#include "base/values.h"
+#include "third_party/skia/include/core/SkDrawFilter.h"
+
+class SkPaint;
+
+namespace skia {
+
+/*
+  When installed on a SkCanvas, reduces the quality of all draws
+  to that canvas. This improves rasterization speed during flings.
+  We turn off blurs, filters, and antialiasing *except for* text.
+*/
+class SK_API PaintSimplifier : public SkDrawFilter {
+ public:
+  PaintSimplifier();
+  virtual ~PaintSimplifier();
+  virtual bool filter(SkPaint*, Type) OVERRIDE;
+
+ private:
+  typedef SkDrawFilter INHERITED;
+};
+
+}  // namespace skia
+
+#endif  // SKIA_EXT_PAINT_SIMPLIFIER_H
+