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cocos2d-x/cocos/2d/CCLabelLayout.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 <string>
+
+#include "2d/CCTTFLabelAtlasCache.h"
+
+#include "math/Vec3.h"
+#include "math/Vec4.h"
+#include "base/ccConfig.h"
+#if CC_ENABLE_TTF_LABEL_RENDERER
+
+namespace cocos2d {
+
+    namespace renderer {
+        class CustomAssembler;
+        class Texture2D;
+        class MeshBuffer;
+        class Effect;
+        class EffectVariant;
+    }
+
+    namespace middleware {
+        class MeshBuffer;
+    }
+
+    class TextRenderGroup;
+    class LabelRenderer;
+
+
+    class TextRowSpace {
+        /**
+        *   Y
+        *   ^
+        *   |
+        *   |
+        *   +------> X
+        */
+    public:
+
+        struct GlyphBlock {
+            Rect area;
+            Rect uv;
+            int texId = 0;
+            bool ignored = false;
+        };
+
+        TextRowSpace() = default;
+        TextRowSpace(TextRowSpace &&other);
+
+        void fillRect(int texId, Rect &rect, Rect &uv);
+        void translate(float x, float y);
+        Vec2 center() const;
+
+        float getWidth() const { return  _data.size() > 0 ? _right - _left : 0; }
+        float getHeight() const { return _data.size() > 0 ? _top - _bottom : 0; }
+        
+        float getExtentedWidth(float left, float right) const;
+
+        Vec2 getOffset() const { return Vec2(_x, _y); }
+
+        GlyphBlock & operator[] (size_t i);
+
+        bool isIgnored() const { return _ignored; }
+
+        bool isIgnored(int i) const { return _data[i].ignored; }
+
+        void clip(const Rect &rec);
+
+        size_t size() const { return _data.size(); }
+
+        bool validate() const { return _data.size() > 0; }
+
+        Rect asRect() const;
+
+        float getLeft() const { return _left; }
+
+        float getRight() const { return _right; }
+
+        float getTop() const { return _top; }
+
+        float getBottom() const { return _bottom; }
+
+    private:
+        void reset();
+
+        GlyphBlock & appendBlock();
+
+    private:
+
+        float _left = FLT_MAX;
+        float _bottom = FLT_MAX;
+        float _right = FLT_MIN;
+        float _top = FLT_MIN;
+        float _x = 0.0f;
+        float _y = 0.0f;
+        std::vector<GlyphBlock>  _data;
+        bool _ignored = false;
+    };
+
+
+
+
+    class LabelLayout {
+    public:
+        LabelLayout(LabelRenderer *r): _renderer(r){}
+        bool init(const std::string& font, const std::string& text, float fontSize, float retinaFontSize, LabelLayoutInfo *info);
+        virtual ~LabelLayout();
+
+        void setString(const std::string &txt, bool forceUpdate);
+
+        bool isInited() const { return _inited; }
+
+        void fillAssembler(renderer::CustomAssembler *assembeler, renderer::EffectVariant *effect);
+
+    private:
+
+        bool updateContent();
+
+    private:
+        std::string _string;
+        std::u32string _u32string;
+        std::string _font;
+        float         _fontSize = 0.0f;
+        float         _retinaFontSize = 0.0f;
+        float      _fontScale = 1.0f;
+        float       _scale = 1.0f;
+
+        //weak reference
+        LabelLayoutInfo *_layoutInfo = nullptr;
+
+        std::shared_ptr<TTFLabelAtlas> _fontAtlas;
+
+        bool        _enableKerning = true;
+        bool        _inited = false;
+
+        std::vector<TextRowSpace> _textSpace;
+
+        std::shared_ptr<TextRenderGroup> _groups;
+        std::shared_ptr<TextRenderGroup> _shadowGroups;
+        LabelRenderer *_renderer = nullptr;
+    };
+
+}
+
+#endif