typographer_context_skia.h

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// Copyright 2013 The Flutter 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 FLUTTER_IMPELLER_TYPOGRAPHER_BACKENDS_SKIA_TYPOGRAPHER_CONTEXT_SKIA_H_
#define FLUTTER_IMPELLER_TYPOGRAPHER_BACKENDS_SKIA_TYPOGRAPHER_CONTEXT_SKIA_H_
 
#include "impeller/typographer/typographer_context.h"
#include "third_party/skia/include/core/SkImageInfo.h"
 
namespace impeller {
 
class TypographerContextSkia : public TypographerContext {
 public:
  static std::shared_ptr<TypographerContext> Make();
 
  TypographerContextSkia();
 
  ~TypographerContextSkia() override;
 
  // |TypographerContext|
  std::shared_ptr<GlyphAtlasContext> CreateGlyphAtlasContext(
      GlyphAtlas::Type type) const override;
 
  // |TypographerContext|
  std::shared_ptr<GlyphAtlas> CreateGlyphAtlas(
      Context& context,
      GlyphAtlas::Type type,
      HostBuffer& host_buffer,
      const std::shared_ptr<GlyphAtlasContext>& atlas_context,
      const std::vector<RenderableText>& renderable_texts) const override;
 
  // Visible for testing.
  static SkImageInfo GetImageInfo(const GlyphAtlas& atlas,
                                  Size size,
                                  bool support_light_glyphs);
 
 private:
  static std::pair<std::vector<FontGlyphPair>, std::vector<Rect>>
  CollectNewGlyphs(const std::shared_ptr<GlyphAtlas>& atlas,
                   const std::vector<RenderableText>& renderable_texts);
 
  TypographerContextSkia(const TypographerContextSkia&) = delete;
 
  TypographerContextSkia& operator=(const TypographerContextSkia&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_TYPOGRAPHER_BACKENDS_SKIA_TYPOGRAPHER_CONTEXT_SKIA_H_