#include "widget.h"
#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();private slots:void saveImageToFile();void refreshImage();private:Ui::Widget *ui;private:QString m_fileName;int m_imgWidth;int m_imgHeight;
};#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"
#include <QImage>
#include <QFile>
#include <QDebug>
#include <QResource>#define IMAG_BIT 3Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);//m_fileName = "radio_but_eq_p.png";m_fileName = "bg.png";ui->imageName->setText(m_fileName);//    QResource resource;
//    resource.setFileName(":/main_bg.png");
//    const uchar* imageData = resource.data();
//    QImage desImage = QImage(imageData, 800,480,QImage::Format_RGB32); //RGB32
//    QPixmap pixmag;
//    pixmag = QPixmap::fromImage(desImage);
//    ui->oldImage->setPixmap(pixmag);
QPixmap pixmap(":/main_bg.png");ui->oldImage->setPixmap(pixmap);//    QPixmap pixmag;
//    pixmag.load(m_fileName);
//    ui->oldImage->setPixmap(pixmag);
connect(ui->start, SIGNAL(clicked(bool)), this, SLOT(saveImageToFile()));connect(ui->refresh, SIGNAL(clicked(bool)), this, SLOT(refreshImage()));
}Widget::~Widget()
{delete ui;
}void Widget::saveImageToFile()
{QImage image(m_fileName);//  QImage image = QImage(800,480,QImage::Format_RGB888); //RGB32//   image.load(m_fileName);int size = image.byteCount();int sizePerLine = image.bytesPerLine();int line = size / sizePerLine;m_imgWidth = image.width();m_imgHeight = image.height();qDebug() << "size:" <<size;qDebug() << "sizePerLine:" << sizePerLine;qDebug() << "line:" << line;qDebug() << "width:" << m_imgWidth;uchar* imgDataNew = image.bits();FILE *pf = fopen("newfile.png", "wb");if(pf == NULL)return;QFile file;file.open(pf, QIODevice::WriteOnly); //1for(int i = 0; i < line; i++){uchar* lineData = image.scanLine(i);for(int j = 0; j < sizePerLine; j++){file.write((char*)(lineData + j),1);}}file.close();//    QImage desImage = QImage(m_imgWidth,m_imgHeight,QImage::Format_RGB32); //RGB32//    //RGB分量值
//    int b = 0;
//    int g = 0;
//    int r = 0;
//    int a = 0;//    //设置像素
//    for (int i=0;i < m_imgHeight;i++)
//    {
//        for (int j=0; j < m_imgWidth * 4;)
//        {
//            b = (int)*(imgDataNew + i * m_imgWidth * 4 + j);
//            g = (int)*(imgDataNew + i * m_imgWidth * 4 + j + 1);
//            r = (int)*(imgDataNew + i * m_imgWidth * 4 + j + 2);
//            a = (int)*(imgDataNew + i * m_imgWidth * 4 + j + 3);
//            desImage.setPixel(j / 4,i,qRgba(r,g,b,a));
//            j = j + 4;
//            //desImage.setPixel(j,i,qRgb(r,g,b));
//        }
//    }//    QPixmap pixmag;
//    pixmag = QPixmap::fromImage(desImage);
//    ui->newImage->setPixmap(pixmag);
}void Widget::refreshImage()
{QFile file(":/newfile.png");//if (!file.open(QIODevice::ReadOnly | QIODevice::Text))if (!file.open(QIODevice::ReadOnly))return;QByteArray array = file.readAll();//file.close();char* imgDataNew = array.data();QImage desImage = QImage(m_imgWidth,m_imgHeight,QImage::Format_RGB32); //RGB32//RGB分量值int b = 0;int g = 0;int r = 0;int a = 0;//设置像素for (int i=0;i < m_imgHeight;i++){for (int j=0; j < m_imgWidth * 4;){b = (int)*(imgDataNew + i * m_imgWidth * 4 + j);g = (int)*(imgDataNew + i * m_imgWidth * 4 + j + 1);r = (int)*(imgDataNew + i * m_imgWidth * 4 + j + 2);a = (int)*(imgDataNew + i * m_imgWidth * 4 + j + 3);desImage.setPixel(j / 4,i,qRgba(r,g,b,a));j = j + 4;//desImage.setPixel(j,i,qRgb(r,g,b));
        }}QPixmap pixmag;pixmag = QPixmap::fromImage(desImage);ui->newImage->setPixmap(pixmag);//    QImage desImage ;
//    if(IMAG_BIT == 3)
//        desImage = QImage(m_imgWidth,m_imgHeight,QImage::Format_RGB888); //RGB24
//    else if(IMAG_BIT == 4)
//        desImage = QImage(m_imgWidth,m_imgHeight,QImage::Format_RGB32); //RGB32//    //RGB分量值
//    char b = 0;
//    char g = 0;
//    char r = 0;
//    char a = 0;//    //设置像素
//    for (int i=0;i < m_imgHeight;i++)
//    {
//        for (int j=0; j < m_imgWidth * IMAG_BIT;)
//        {
//            b = (int)*(imgDataNew + i * m_imgWidth * IMAG_BIT + j);
//            g = (int)*(imgDataNew + i * m_imgWidth * IMAG_BIT + j + 1);
//            r = (int)*(imgDataNew + i * m_imgWidth * IMAG_BIT + j + 2);
//            if(IMAG_BIT == 4)
//            {
//                a = (int)*(imgDataNew + i * m_imgWidth * IMAG_BIT + j + 3);
//                desImage.setPixel(j / IMAG_BIT,i,qRgba(r,g,b,a));
//            }
//            else if(IMAG_BIT == 3)
//            {
//                desImage.setPixel(j / IMAG_BIT, i, qRgb(r,g,b));
//            }
//            j = j + IMAG_BIT;
//        }
//    }//    QPixmap pixmag;
//    pixmag = QPixmap::fromImage(desImage);
//    ui->newImage->setPixmap(pixmag);
}