colormap.cpp
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#include <qimage.h>
#include <qcolor.h>
#include <iostream>
void qt_buffer2image(unsigned char* buffer, std::string filename, unsigned int x_size, unsigned int y_size)
{
//x_size = 256;
//y_size = 256;
//create an image object
QImage image(x_size, y_size, QImage::Format_RGB32);
if(image.isNull())
{
std::cout<<"Error creating QImage."<<std::endl;
return;
}
int i;
unsigned char r, g, b;
unsigned int x, y;
for(y=0; y<y_size; y++)
for(x=0; x<x_size; x++)
{
//calculate the 1D index
i = y * x_size + x;
r = buffer[i * 3 + 0];
g = buffer[i * 3 + 1];
b = buffer[i * 3 + 2];
//set the image pixel
QColor color(r, g, b);
image.setPixel(x, y, color.rgb());
}
if(!image.save(filename.c_str()))
std::cout<<"Error saving QImage."<<std::endl;
}