Let's dive into the project's core. To speed up the Mandelbrot picture generation, we will split the whole computation into multiple jobs. A Job is a request of a task. Depending on your CPU architecture, several jobs will be executed simultaneously. A Job class produces a JobResult function containing result values. In our project, a Job class generates values for one line of the complete picture. For example, an image resolution of 800 x 600 requires 600 jobs, each one generating 800 values.

Please create a C++ header file called JobResult.h:

#include <QSize> 
#include <QVector> 
#include <QPointF> 
 
struct JobResult 
{ 
    JobResult(int valueCount = 1) : 
        areaSize(0, 0), 
        pixelPositionY(0), 
        moveOffset(0, 0), 
        scaleFactor(0.0), 
        values(valueCount) 
    { 
    } 
 
    QSize areaSize; 
    int pixelPositionY; 
    QPointF moveOffset; 
    double scaleFactor; 
 
    QVector<int> values; ...