axmol/cocos/base/ccUtils.cpp

/****************************************************************************
Copyright (c) 2010      cocos2d-x.org
Copyright (c) 2013-2017 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "base/ccUtils.h"

#include <cmath>
#include <stdlib.h>
#include "md5/md5.h"

#include "base/CCDirector.h"
#include "base/CCAsyncTaskPool.h"
#include "base/CCEventDispatcher.h"
#include "base/base64.h"
#include "renderer/CCCustomCommand.h"
#include "renderer/CCRenderer.h"
#include "renderer/CCTextureCache.h"

#include "platform/CCImage.h"
#include "platform/CCFileUtils.h"
#include "2d/CCSprite.h"
#include "2d/CCRenderTexture.h"

NS_CC_BEGIN

int ccNextPOT(int x)
{
    x = x - 1;
    x = x | (x >> 1);
    x = x | (x >> 2);
    x = x | (x >> 4);
    x = x | (x >> 8);
    x = x | (x >>16);
    return x + 1;
}

namespace utils
{
/**
* Capture screen implementation, don't use it directly.
*/
void onCaptureScreen(const std::function<void(bool, const std::string&)>& afterCaptured, const std::string& filename)
{
    static bool startedCapture = false;

    if (startedCapture)
    {
        CCLOG("Screen capture is already working");
        if (afterCaptured)
        {
            afterCaptured(false, filename);
        }
        return;
    }
    else
    {
        startedCapture = true;
    }


    auto glView = Director::getInstance()->getOpenGLView();
    auto frameSize = glView->getFrameSize();
#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC) || (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32) || (CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
    frameSize = frameSize * glView->getFrameZoomFactor() * glView->getRetinaFactor();
#endif

    int width = static_cast<int>(frameSize.width);
    int height = static_cast<int>(frameSize.height);

    bool succeed = false;
    std::string outputFile = "";

    do
    {
        std::shared_ptr<GLubyte> buffer(new GLubyte[width * height * 4], [](GLubyte* p){ CC_SAFE_DELETE_ARRAY(p); });
        if (!buffer)
        {
            break;
        }

        glPixelStorei(GL_PACK_ALIGNMENT, 1);
        glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer.get());

        std::shared_ptr<GLubyte> flippedBuffer(new GLubyte[width * height * 4], [](GLubyte* p) { CC_SAFE_DELETE_ARRAY(p); });
        if (!flippedBuffer)
        {
            break;
        }

        for (int row = 0; row < height; ++row)
        {
            memcpy(flippedBuffer.get() + (height - row - 1) * width * 4, buffer.get() + row * width * 4, width * 4);
        }

        Image* image = new (std::nothrow) Image;
        if (image)
        {
            image->initWithRawData(flippedBuffer.get(), width * height * 4, width, height, 8);
            if (FileUtils::getInstance()->isAbsolutePath(filename))
            {
                outputFile = filename;
            }
            else
            {
                CCASSERT(filename.find("/") == std::string::npos, "The existence of a relative path is not guaranteed!");
                outputFile = FileUtils::getInstance()->getWritablePath() + filename;
            }

            // Save image in AsyncTaskPool::TaskType::TASK_IO thread, and call afterCaptured in mainThread
            static bool succeedSaveToFile = false;
            std::function<void(void*)> mainThread = [afterCaptured, outputFile](void* /*param*/)
            {
                if (afterCaptured)
                {
                    afterCaptured(succeedSaveToFile, outputFile);
                }
                startedCapture = false;
            };

            AsyncTaskPool::getInstance()->enqueue(AsyncTaskPool::TaskType::TASK_IO, mainThread, nullptr, [image, outputFile]()
            {
                succeedSaveToFile = image->saveToFile(outputFile);
                delete image;
            });
        }
        else
        {
            CCLOG("Malloc Image memory failed!");
            if (afterCaptured)
            {
                afterCaptured(succeed, outputFile);
            }
            startedCapture = false;
        }
    } while (0);
}

/*
 * Capture screen interface
 */
static EventListenerCustom* s_captureScreenListener;
static CustomCommand s_captureScreenCommand;
void captureScreen(const std::function<void(bool, const std::string&)>& afterCaptured, const std::string& filename)
{
    if (s_captureScreenListener)
    {
        CCLOG("Warning: CaptureScreen has been called already, don't call more than once in one frame.");
        return;
    }
    s_captureScreenCommand.init(std::numeric_limits<float>::max());
    s_captureScreenCommand.func = std::bind(onCaptureScreen, afterCaptured, filename);
    s_captureScreenListener = Director::getInstance()->getEventDispatcher()->addCustomEventListener(Director::EVENT_AFTER_DRAW, [](EventCustom* /*event*/) {
        auto director = Director::getInstance();
        director->getEventDispatcher()->removeEventListener((EventListener*)(s_captureScreenListener));
        s_captureScreenListener = nullptr;
        director->getRenderer()->addCommand(&s_captureScreenCommand);
        director->getRenderer()->render();
    });
}

Image* captureNode(Node* startNode, float scale)
{ // The best snapshot API, support Scene and any Node
    auto& size = startNode->getContentSize();

    Director::getInstance()->setNextDeltaTimeZero(true);

    RenderTexture* finalRtx = nullptr;

    auto rtx = RenderTexture::create(size.width, size.height, Texture2D::PixelFormat::RGBA8888, GL_DEPTH24_STENCIL8);
    // rtx->setKeepMatrix(true);
    Point savedPos = startNode->getPosition();
    Point anchor;
    if (!startNode->isIgnoreAnchorPointForPosition()) {
        anchor = startNode->getAnchorPoint();
    }
    startNode->setPosition(Point(size.width * anchor.x, size.height * anchor.y));
    rtx->begin(); 
    startNode->visit();
    rtx->end();
    startNode->setPosition(savedPos);

    if (std::abs(scale - 1.0f) < 1e-6f/* no scale */)
        finalRtx = rtx;
    else {
        /* scale */
        auto finalRect = Rect(0, 0, size.width, size.height);
        Sprite *sprite = Sprite::createWithTexture(rtx->getSprite()->getTexture(), finalRect);
        sprite->setAnchorPoint(Point(0, 0));
        sprite->setFlippedY(true);

        finalRtx = RenderTexture::create(size.width * scale, size.height * scale, Texture2D::PixelFormat::RGBA8888, GL_DEPTH24_STENCIL8);

        sprite->setScale(scale); // or use finalRtx->setKeepMatrix(true);
        finalRtx->begin(); 
        sprite->visit();
        finalRtx->end();
    }

    Director::getInstance()->getRenderer()->render();

    return finalRtx->newImage();
}

std::vector<Node*> findChildren(const Node &node, const std::string &name)
{
    std::vector<Node*> vec;
    
    node.enumerateChildren(name, [&vec](Node* nodeFound) -> bool {
        vec.push_back(nodeFound);
        return false;
    });

    return vec;
}

#define MAX_ITOA_BUFFER_SIZE 256
double atof(const char* str)
{
    if (str == nullptr)
    {
        return 0.0;
    }
    
    char buf[MAX_ITOA_BUFFER_SIZE];
    strncpy(buf, str, MAX_ITOA_BUFFER_SIZE);
    
    // strip string, only remain 7 numbers after '.'
    char* dot = strchr(buf, '.');
    if (dot != nullptr && dot - buf + 8 <  MAX_ITOA_BUFFER_SIZE)
    {
        dot[8] = '\0';
    }
    
    return ::atof(buf);
}

double gettime()
{
    struct timeval tv;
    gettimeofday(&tv, nullptr);

    return (double)tv.tv_sec + (double)tv.tv_usec/1000000;
}

long long getTimeInMilliseconds()
{
    struct timeval tv;
    gettimeofday (&tv, nullptr);
    return (long long)tv.tv_sec * 1000 + tv.tv_usec / 1000;
}

Rect getCascadeBoundingBox(Node *node)
{
    Rect cbb;
    Size contentSize = node->getContentSize();
    
    // check all children bounding box, get maximize box
    Node* child = nullptr;
    bool merge = false;
    for(auto object : node->getChildren())
    {
        child = dynamic_cast<Node*>(object);
        if (!child->isVisible()) continue;
        
        const Rect box = getCascadeBoundingBox(child);
        if (box.size.width <= 0 || box.size.height <= 0) continue;
        
        if (!merge)
        {
            cbb = box;
            merge = true;
        }
        else
        {
            cbb.merge(box);
        }
    }
    
    // merge content size
    if (contentSize.width > 0 && contentSize.height > 0)
    {
        const Rect box = RectApplyAffineTransform(Rect(0, 0, contentSize.width, contentSize.height), node->getNodeToWorldAffineTransform());
        if (!merge)
        {
            cbb = box;
        }
        else
        {
            cbb.merge(box);
        }
    }
    
    return cbb;
}

Sprite* createSpriteFromBase64Cached(const char* base64String, const char* key)
{
    Texture2D* texture = Director::getInstance()->getTextureCache()->getTextureForKey(key);

    if (texture == nullptr)
    {
        unsigned char* decoded;
        int length = base64Decode((const unsigned char*)base64String, (unsigned int)strlen(base64String), &decoded);

        Image *image = new (std::nothrow) Image();
        bool imageResult = image->initWithImageData(decoded, length);
        CCASSERT(imageResult, "Failed to create image from base64!");
        free(decoded);

        if (!imageResult) {
            CC_SAFE_RELEASE_NULL(image);
            return nullptr;
        }

        texture = Director::getInstance()->getTextureCache()->addImage(image, key);
        image->release();
    }

    Sprite* sprite = Sprite::createWithTexture(texture);
    
    return sprite;
}

Sprite* createSpriteFromBase64(const char* base64String)
{
    unsigned char* decoded;
    int length = base64Decode((const unsigned char*)base64String, (unsigned int)strlen(base64String), &decoded);

    Image *image = new (std::nothrow) Image();
    bool imageResult = image->initWithImageData(decoded, length);
    CCASSERT(imageResult, "Failed to create image from base64!");
    free(decoded);

    if (!imageResult) {
        CC_SAFE_RELEASE_NULL(image);
        return nullptr;
    }

    Texture2D *texture = new (std::nothrow) Texture2D();
    texture->initWithImage(image);
    texture->setAliasTexParameters();
    image->release();

    Sprite* sprite = Sprite::createWithTexture(texture);
    texture->release();

    return sprite;
}

Node* findChild(Node* levelRoot, const std::string& name)
{
    if (levelRoot == nullptr || name.empty())
        return nullptr;

    // Find this node
    auto target = levelRoot->getChildByName(name);
    if (target != nullptr)
        return target;

    // Find recursively
    for (auto& child : levelRoot->getChildren())
    {
        target = findChild(child, name);
        if (target != nullptr)
            return target;
    }
    return nullptr;
}

Node* findChild(Node* levelRoot, int tag)
{
    if (levelRoot == nullptr || tag == Node::INVALID_TAG)
        return nullptr;

    // Find this node
    auto target = levelRoot->getChildByTag(tag);
    if (target != nullptr)
        return target;

    // Find recursively
    for (auto& child : levelRoot->getChildren())
    {
        target = findChild(child, tag);
        if (target != nullptr)
            return target;
    }

    return nullptr;
}

std::string getFileMD5Hash(const std::string &filename)
{
    static const unsigned int MD5_DIGEST_LENGTH = 16;

    Data d;
    FileUtils::getInstance()->getContents(filename, &d);

    md5_state_t state;
    md5_byte_t digest[MD5_DIGEST_LENGTH];
    char hexOutput[(MD5_DIGEST_LENGTH << 1) + 1] = {0};

    md5_init(&state);
    md5_append(&state, (const md5_byte_t *)d.getBytes(), (int)d.getSize());
    md5_finish(&state, digest);

    for (int di = 0; di < 16; ++di)
        sprintf(hexOutput + di * 2, "%02x", digest[di]);

    return hexOutput;
}

}

NS_CC_END