| // 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_LAZY_GLYPH_ATLAS_H_ |
| #define FLUTTER_IMPELLER_TYPOGRAPHER_LAZY_GLYPH_ATLAS_H_ |
| |
| #include <unordered_map> |
| |
| #include "flutter/fml/macros.h" |
| #include "impeller/renderer/context.h" |
| #include "impeller/typographer/glyph_atlas.h" |
| #include "impeller/typographer/text_frame.h" |
| #include "impeller/typographer/typographer_context.h" |
| |
| namespace impeller { |
| |
| class LazyGlyphAtlas { |
| public: |
| explicit LazyGlyphAtlas( |
| std::shared_ptr<TypographerContext> typographer_context); |
| |
| ~LazyGlyphAtlas(); |
| |
| void AddTextFrame(const TextFrame& frame, Scalar scale); |
| |
| void ResetTextFrames(); |
| |
| const std::shared_ptr<GlyphAtlas>& CreateOrGetGlyphAtlas( |
| Context& context, |
| GlyphAtlas::Type type) const; |
| |
| private: |
| std::shared_ptr<TypographerContext> typographer_context_; |
| |
| FontGlyphMap alpha_glyph_map_; |
| FontGlyphMap color_glyph_map_; |
| std::shared_ptr<GlyphAtlasContext> alpha_context_; |
| std::shared_ptr<GlyphAtlasContext> color_context_; |
| mutable std::shared_ptr<GlyphAtlas> alpha_atlas_; |
| mutable std::shared_ptr<GlyphAtlas> color_atlas_; |
| |
| LazyGlyphAtlas(const LazyGlyphAtlas&) = delete; |
| |
| LazyGlyphAtlas& operator=(const LazyGlyphAtlas&) = delete; |
| }; |
| |
| } // namespace impeller |
| |
| #endif // FLUTTER_IMPELLER_TYPOGRAPHER_LAZY_GLYPH_ATLAS_H_ |