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cocos2d-x/cocos/2d/CCTTFLabelAtlasCache.h

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+/****************************************************************************
+Copyright (c) 2020 Xiamen Yaji Software Co., Ltd.
+
+http://www.cocos.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+****************************************************************************/
+#pragma once
+
+
+#include "2d/CCFontFreetype.h"
+#include "2d/CCFontAtlas.h"
+
+#include <unordered_map>
+#include <memory>
+
+#include "base/ccConfig.h"
+#if CC_ENABLE_TTF_LABEL_RENDERER
+
+#define CC_TTF_LABELATLAS_ENABLE_GC 1
+
+namespace cocos2d {
+
+    class TTFLabelAtlasCache;
+    struct LabelLayoutInfo;
+
+    // font atlas of specific size font
+    class TTFLabelAtlas {
+    public:
+        
+        TTFLabelAtlas(const std::string &, float, LabelLayoutInfo *info);
+
+        
+        inline FontAtlas * getFontAtlas() const { return _fontAtlas.get(); }
+        inline FontFreeType * getTTF() const { return _ttfFont.get(); }
+
+        float getFontSize() const { return _fontSize; }
+
+        bool init();
+
+    private:
+        std::string _fontName;
+        float _fontSize = 0.f;
+        //weak reference
+        LabelLayoutInfo *_info =  nullptr;
+        std::shared_ptr<FontAtlas> _fontAtlas;
+        std::shared_ptr<FontFreeType> _ttfFont;
+        
+        friend class TTFLabelAtlasCache;
+    };
+
+    class TTFLabelAtlasCache {
+    public:
+
+        static TTFLabelAtlasCache* getInstance();
+        static void destroyInstance();
+
+        void reset();
+
+        std::shared_ptr<TTFLabelAtlas> load(const std::string &font, float fontSize, LabelLayoutInfo* info);
+
+        void unload(TTFLabelAtlas *);
+
+    protected:
+
+        std::string cacheKeyFor(const std::string &font, int fontSize, LabelLayoutInfo *info);
+
+        TTFLabelAtlasCache() {}
+    private:
+#if CC_TTF_LABELATLAS_ENABLE_GC
+        std::unordered_map< std::string, std::weak_ptr< TTFLabelAtlas>> _cache;
+#else
+        std::unordered_map< std::string, std::shared_ptr< TTFLabelAtals>> _cache;
+#endif
+
+    };
+
+}
+
+#endif