opencv 提取RGB并用cocos2d-x 纹理方式显示

{

#include "MainScene.h"
#include "SimpleAudioEngine.h"
#include <iostream>
#include <string.h>
using namespace std;
#include "opencv.hpp"
#include <opencv2/features2d.hpp>
#include "opencv2/highgui.hpp"
using namespace cv;


extern "C"
{
#include "SDL.h"

#include <libavutil/imgutils.h>
#include <libavutil/parseutils.h>
#include <libswscale/swscale.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libavutil/file.h>
#include <libavdevice/avdevice.h>
}


Scene* MainScene::createScene()
{
    return MainScene::create();
}


bool MainScene::init()
{
    if ( !Scene::init() )
    {
        return false;
    }

    visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    
    string filename = "I:/ImageGrid/135708z4u8eha6gucne2ug.jpg";
    //string filename = "D:/PriPro/Pro/simulator/win32/src/client/res/log/Log_1.png";

    Image *image = new Image();
    image->autorelease();
    Mat img = imread(filename.c_str());
    int size = img.rows * img.cols * 4;
    uchar *data = new uchar[size];
    memset(data, 255, size);

    if (img.empty())
    {
        return 0;
    }
    int pos = 0;

    for (int i = 0; i < img.rows; i++)
    {
        for (int j = 0; j < img.cols; j++)
        {
            auto rgb = img.at<Vec3b>(i, j);

            pos += 4;

            uchar r = (uchar)rgb[2];
            data[pos - 4] = r;
            uchar g = (uchar)rgb[1];
            data[pos - 3] = g;
            uchar b = (uchar)rgb[0];
            data[pos - 2] = b;
            
        }
    }





    image->initWithRawData(data,
        img.rows * img.cols,
        img.cols,img.rows,
        (int)Texture2D::PixelFormat::RGBA8888);
    image->setPNGPremultipliedAlphaEnabled(true);

    Texture2D *tex = new Texture2D();
    tex->autorelease();
    tex->initWithImage(image);



    auto s = Sprite::createWithTexture(tex);
    s->setScale(0.5);
    s->setPosition(visibleSize / 2);

    this->addChild(s);



    return true;
}

}