is there any way to insert QPixmap object in html?

Question

Simple situation: I have an object, which has a QPixmap member. Object first created (pixmap is null now), then pixmap readed from data base and inserted in obj

Answer 1

This is my two cents about serializing/deserializing QPixmap to/from Base64 e strings. I've included methods to load/save the image as a text file but also two simple toBase64() and fromBase64() that help with HTML, SQL or JSON encoding.

#include "b64utils.h"
#include 
#include 
#include 

/**
 * Serializes a QPixmap object into a Base64 string
 */
QString B64Utils::toBase64(QPixmap *pixmap) {
    // Convert the pixel map into a base64 byte array
    QBuffer *buffer = new QBuffer;
    pixmap->save(buffer, "png");
    QByteArray b64 = buffer->data().toBase64();
    QString *b64Str = new QString(b64);
    return *b64Str;
}

/**
 * Serializes a QPixmap object into a Base64 string and save it to a file
 */
bool B64Utils::savePixmapToBase64(QPixmap *pixmap, QString filePath) {
    // Opens a file for writing text
    QFile file(filePath);
    if (!file.open(QIODevice::WriteOnly | QFile::Text)) return false;

    // Write the Base64 string into the file
    QTextStream stream(&file);
    stream << toBase64(pixmap);
    file.close();

    return true;
}

/**
 * Deserializes a Base64 string, representing an image, into a QPixmap
 */
QPixmap* B64Utils::fromBase64(QString b64Str) {
    QPixmap *pixmap = new QPixmap;
    pixmap->loadFromData(QByteArray::fromBase64(b64Str.toUtf8()));
    return pixmap;
}

/**
 * Retrieves a Base64 string, representing an image, from a file and deserializes it into a QPixmap
 */
QPixmap* B64Utils::loadPixmapFromBase64(QString filePath) {
    // Opens a file for reading text
    QFile file(filePath);
    if (!file.open(QFile::ReadOnly | QFile::Text)) return nullptr;

    // Reads the contents of the file into a string
    QTextStream in(&file);
    QString b64Str = in.readAll();
    file.close();

    return fromBase64(b64Str);
}