axmol/core/2d/CCLabelAtlas.h

/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

https://axis-project.github.io/

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#ifndef __CCLABEL_ATLAS_H__
#define __CCLABEL_ATLAS_H__

#include "2d/CCAtlasNode.h"
#if AX_LABELATLAS_DEBUG_DRAW
#    include "renderer/CCCustomCommand.h"
#    include "2d/CCDrawNode.h"
#endif
NS_AX_BEGIN

/**
 * @addtogroup _2d
 * @{
 */

/**
 * @class LabelAtlas
 * @brief LabelAtlas is a subclass of AtlasNode.
 *
 * It can be as a replacement of Label since it is MUCH faster.
 *
 * LabelAtlas versus Label:
 * - LabelAtlas is MUCH faster than Label.
 * - LabelAtlas "characters" have a fixed height and width.
 * - LabelAtlas "characters" can be anything you want since they are taken from an image file.
 *
 * A more flexible class is LabelBMFont. It supports variable width characters and it also has a nice editor.
 */
class AX_DLL LabelAtlas : public AtlasNode, public LabelProtocol
{
public:
    /** Creates the LabelAtlas with a string, a char map file(the atlas), the width and height of each element and the
     * starting char of the atlas. */
    static LabelAtlas* create(std::string_view string,
                              std::string_view charMapFile,
                              int itemWidth,
                              int itemHeight,
                              int startCharMap);

    /**
     * Creates the LabelAtlas with a string and a configuration file.
     * @since v2.0
     */
    static LabelAtlas* create(std::string_view string, std::string_view fntFile);

    /**
     * Creates the LabelAtlas with a string, a texture, the width and height of each element and the starting char of
     * the atlas.
     */
    static LabelAtlas* create(std::string_view string,
                              Texture2D* texture,
                              int itemWidth,
                              int itemHeight,
                              int startCharMap);

    /** Initializes the LabelAtlas with a string, a char map file(the atlas), the width and height of each element and
     * the starting char of the atlas. */
    bool initWithString(std::string_view string,
                        std::string_view charMapFile,
                        int itemWidth,
                        int itemHeight,
                        int startCharMap);

    /**
     * Initializes the LabelAtlas with a string and a configuration file.
     * @since v2.0
     */
    bool initWithString(std::string_view string, std::string_view fntFile);

    /** Initializes the LabelAtlas with a string, a texture, the width and height in points of each element and the
     * starting char of the atlas */
    bool initWithString(std::string_view string, Texture2D* texture, int itemWidth, int itemHeight, int startCharMap);

    virtual void setString(std::string_view label) override;
    virtual std::string_view getString() const override;

    virtual void updateAtlasValues() override;
    /**
     * @js NA
     */
    virtual std::string getDescription() const override;

#if AX_LABELATLAS_DEBUG_DRAW
    virtual void draw(Renderer* renderer, const Mat4& transform, uint32_t flags) override;
#endif

    LabelAtlas()
    {
#if AX_LABELATLAS_DEBUG_DRAW
        _debugDrawNode = DrawNode::create();
        addChild(_debugDrawNode);
#endif
    }

    virtual ~LabelAtlas() { _string.clear(); }

protected:
    virtual void updateColor() override;

#if AX_LABELATLAS_DEBUG_DRAW
    DrawNode* _debugDrawNode;
#endif

    // string to render
    std::string _string;
    // the first char in the char map
    int _mapStartChar;
};

// end group
/// @}

NS_AX_END

#endif  //__CCLABEL_ATLAS_H__