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// Copyright 2016 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_RENDER_TREE_GLYPH_BUFFER_H_
#define COBALT_RENDER_TREE_GLYPH_BUFFER_H_
#include "base/memory/ref_counted.h"
#include "cobalt/math/rect_f.h"
namespace cobalt {
namespace render_tree {
// The GlyphBuffer class is a base class, which contains the data needed to
// render shaped text. It is intended to be immutable and thread-safe. Since
// GlyphBuffer objects may be created in the front-end, but must be accessed
// by the rasterizer, it is expected that they will be downcast again to a
// rasterizer-specific type through base::polymorphic_downcast().
class GlyphBuffer : public base::RefCountedThreadSafe<GlyphBuffer> {
public:
explicit GlyphBuffer(const math::RectF& bounds) : bounds_(bounds) {}
virtual ~GlyphBuffer() {}
const math::RectF& GetBounds() const { return bounds_; }
private:
const math::RectF bounds_;
// Allow the reference counting system access to our destructor.
friend class base::RefCountedThreadSafe<GlyphBuffer>;
};
} // namespace render_tree
} // namespace cobalt
#endif // COBALT_RENDER_TREE_GLYPH_BUFFER_H_