axmol/cocos/base/ccUtils.h

/****************************************************************************
Copyright (c) 2010      cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
Copyright (c) 2020 c4games.com

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#ifndef __CC_UTILS_H__
#define __CC_UTILS_H__

#include <vector>
#include <string>
#include "2d/CCNode.h"
#include "base/ccMacros.h"
#include "base/CCData.h"
#include "renderer/backend/Types.h"
#include "math/Mat4.h"

#define CC_HEX2CHAR(hex) (hex < 0xa ? (hex + '0') : (hex + 'a' - 10))

/** @file ccUtils.h
Misc free functions
*/

NS_CC_BEGIN
/*
ccNextPOT function is licensed under the same license that is used in Texture2D.m.
*/

/** Returns the Next Power of Two value.

Examples:
- If "value" is 15, it will return 16.
- If "value" is 16, it will return 16.
- If "value" is 17, it will return 32.
@param value The value to get next power of two.
@return Returns the next power of two value.
@since v0.99.5
*/

int ccNextPOT(int value);

class Sprite;
class Image;

namespace utils
{
    /** Capture the entire screen.
     * To ensure the snapshot is applied after everything is updated and rendered in the current frame,
     * we need to wrap the operation with a custom command which is then inserted into the tail of the render queue.
     * @param afterCaptured specify the callback function which will be invoked after the snapshot is done.
     * @param filename specify a filename where the snapshot is stored. This parameter can be either an absolute path or a simple
     * base filename ("hello.png" etc.), don't use a relative path containing directory names.("mydir/hello.png" etc.).
     * @since v3.2
     */
    CC_DLL void  captureScreen(const std::function<void(bool, const std::string&)>& afterCaptured, const std::string& filename);

    /** Capture a specific Node.
    * @param startNode specify the snapshot Node. It should be cocos2d::Scene
    * @param scale
    * @returns: return a Image, then can call saveToFile to save the image as "xxx.png or xxx.jpg".
    * @since v3.11
    * !!! remark: Caller is responsible for releasing it by calling delete.
    */
    CC_DLL void captureNode(Node* startNode, std::function<void(Image*)> imageCallback, float scale = 1.0f);
    
    /** Find children by name, it will return all child that has the same name.
     * It supports c++ 11 regular expression. It is  a helper function of `Node::enumerateChildren()`.
     * You can refer to `Node::enumerateChildren()` for detail information.
     *
     * @param node The node to find
     * @param name The name to search for, it supports c++ 11 expression
     * @return Array of Nodes that matches the name
     * @since v3.2
     */
    CC_DLL std::vector<Node*>  findChildren(const Node &node, const std::string &name);
    
    /** Same to ::atof, but strip the string, remain 7 numbers after '.' before call atof.
     * Why we need this? Because in android c++_static, atof ( and std::atof ) is unsupported for numbers have long decimal part and contain
     * several numbers can approximate to 1 ( like 90.099998474121094 ), it will return inf. This function is used to fix this bug.
     * @param str The string be to converted to double.
     * @return Returns converted value of a string.
     */
    CC_DLL double  atof(const char* str);

    /** Get current exact time, accurate to nanoseconds.
     * @return Returns the time in seconds since the Epoch.
     */
    CC_DLL double  gettime();

    /**
     * Get current time in milliseconds, accurate to nanoseconds
     *
     * @return  Returns the time in milliseconds since the Epoch.
     */
    CC_DLL long long  getTimeInMilliseconds();

    /**
     * Calculate unionof bounding box of a node and its children.
     * @return Returns unionof bounding box of a node and its children.
     */
    CC_DLL Rect getCascadeBoundingBox(Node *node);

    /**
     * Create a sprite instance from base64 encoded image and adds the texture to the Texture Cache.

     * @return Returns an instance of sprite
     */
    CC_DLL Sprite* createSpriteFromBase64Cached(const char* base64String, const char* key);

    /**
    * Create a sprite instance from base64 encoded image.

    * @return Returns an instance of sprite
    */
    CC_DLL Sprite* createSpriteFromBase64(const char* base64String);


    /**
     * Find a child by name recursively

     * @return  Returns found node or nullptr
     */
    CC_DLL Node*  findChild(Node* levelRoot, const std::string& name);

    /**
     * Find a child by tag recursively

     * @return Returns found node or nullptr
     */
    CC_DLL Node*  findChild(Node* levelRoot, int tag);

    /**
     * Find a child by name recursively

     * @return  Returns found node or nullptr with specified type 'T'
     */
    template<typename T>
    inline T findChild(Node* levelRoot, const std::string& name)
    {
        return dynamic_cast<T>(findChild(levelRoot, name));
    }

    /**
     * Find a child by tag recursively

     * @return  Returns found node or nullptr with specified type 'T'
     */
    template<typename T>
    inline T findChild(Node* levelRoot, int tag)
    {
        return dynamic_cast<T>(findChild(levelRoot, tag));
    }

    /**
     *  Gets the md5 hash for the given file.
     *  @param filename The file to calculate md5 hash.
     *  @return The md5 hash for the file
     */
    CC_DLL std::string getFileMD5Hash(const std::string &filename);


    /**
    *  Gets the md5 hash for the given buffer.
    *  @param data The buffer to calculate md5 hash.
    *  @return The md5 hash for the data
    */
    CC_DLL std::string getDataMD5Hash(const Data &data);

    /**
    @brief Converts language iso 639-1 code to LanguageType enum.
    @return LanguageType enum.
    * @js NA
    * @lua NA
    */
    CC_DLL LanguageType getLanguageTypeByISO2(const char* code);
    
    CC_DLL backend::BlendFactor toBackendBlendFactor(int factor);

    CC_DLL int toGLBlendFactor(backend::BlendFactor blendFactor);

    CC_DLL backend::SamplerFilter toBackendSamplerFilter(int mode);

    CC_DLL backend::SamplerAddressMode toBackendAddressMode(int mode);

    // Adjust matrix for metal.
    CC_DLL const Mat4& getAdjustMatrix();

    /**
    Get the Normal Matrix of matrixMV
    */
    CC_DLL std::vector<float> getNormalMat3OfMat4(const Mat4 &mat);

    /**
    @brief Parses a list of space-separated integers.
    @return Vector of ints.
    * @js NA
    * @lua NA
    */
    CC_DLL std::vector<int> parseIntegerList(const std::string &intsString);
	
	/**
    @brief translate charstring/binarystream to hexstring.
    @return hexstring.
    * @js NA
    * @lua NA
    */
    CC_DLL std::string bin2hex(const std::string& binary /*charstring also regard as binary in C/C++*/, int delim = -1, bool prefix = false);

    /**
    @brief killCurrentProcess immidiately, any object's destructor never call
    @return NA.
    * @js NA
    * @lua NA
    */
    CC_DLL void killCurrentProcess();

    /*
    * The deleter of cocos2d::Ref for std::unique_ptr
    */
    template<typename T>
    struct instance_delete
    {
        constexpr instance_delete() noexcept = default;

        template <class T2, std::enable_if_t<std::is_convertible<T2*, T*>::value, int> = 0>
        instance_delete(const instance_delete<T2>&) noexcept {}

        void operator()(T* _Ptr) const noexcept /* strengthened */ { // delete a pointer
            static_assert(0 < sizeof(T), "can't release an incomplete type");
            if (_Ptr) _Ptr->release();
        }
    };

    /*
    * The helper template for use cocos2d::Ref + std::unique_ptr
    * std::vector<utils::instance_ptr<Node>> nodes;
    */
    template<typename T>
    using instance_ptr = std::unique_ptr<T, instance_delete<T>>;

    /**
    * Create a Game Object, like CREATE_FUNC, but more powerful

    * @return  Returns a instance_ptr<T> game object
    * @remark  Auto manage cocos2d::Ref reference count, use std::unique_ptr
    * @limition  The init function finit must be public
    */
    template <typename T, typename F, typename... Ts>
    static instance_ptr<T> makeInstance(F&& memf, Ts&&... args)
    {
        T* pRet = new(std::nothrow) T();
        if (pRet && std::mem_fn(memf)(pRet, std::forward<Ts>(args)...))
        {
            return instance_ptr<T>(pRet);
        }
        else
        {
            delete pRet;
            pRet = nullptr;
            return nullptr;
        }
    }

   /**
   * Create a Game Object with 'bool T::init()', like CREATE_FUNC, but more powerful

   * @return  Returns a autorelease game object
   * @remark  Auto manage cocos2d::Ref reference count, use std::unique_ptr
   * @limition  The init function finit must be public
   */
    template<typename T> inline
        static instance_ptr<T> makeInstance()
    {
        return makeInstance<T>(&T::init);
    }

    /**
    * Create a Game Object, like CREATE_FUNC, but more powerful

    * @return  Returns a autorelease game object
    * @remark  Auto manage cocos2d::Ref reference count, use AutoReleasePool
    * @limition The init function finit must be public
    */
    template<typename T, typename F, typename...Ts>
    inline T* createInstance(F&& finit, Ts&&... args)
    {
        T* pRet = new(std::nothrow) T();
        if (pRet && std::mem_fn(finit)(pRet, std::forward<Ts>(args)...)) {
            pRet->autorelease();
            return pRet;
        }
        else
        {
            delete pRet;
            pRet = nullptr;
            return nullptr;
        }
    }

    /**
   * Create a Game Object with 'bool T::init()', like CREATE_FUNC, but more powerful

   * @return  Returns a autorelease game object
   * @remark  Auto manage cocos2d::Ref reference count, use AutoReleasePool
   * @limition  The init function finit must be public
   */
    template<typename T>
    inline T* createInstance()
    {
        return ::cocos2d::utils::createInstance<T>(&T::init);
    }

    /**
   * Create a Game Object with 'bool T::init()', like CREATE_FUNC, but more powerful

   * @return  Returns a game object
   * @remark  You need call release after you don't want use it manually
   * @limition  The init function finit must be public
   */
    template <typename T, typename F, typename... Ts>
    static T* newInstance(F&& memf, Ts&&... args)
    {
        T* pRet = new(std::nothrow) T();
        if (pRet && std::mem_fn(memf)(pRet, std::forward<Ts>(args)...))
        {
            return pRet;
        }
        else
        {
            delete pRet;
            pRet = nullptr;
            return nullptr;
        }
    }

    /**
    * Create a Game Object with 'bool T::init()', like CREATE_FUNC, but more powerful
    
    * @return  Returns a game object
    * @remark  You need call release after you don't want use it manually
    * @limition  The init function finit must be public
    */
    template<typename T> inline
        static T* newInstance()
    {
        return newInstance<T>(&T::init);
    }
}

NS_CC_END

#endif // __SUPPORT_CC_UTILS_H__