svghandler.cpp

#include "svghandler.h"
#include <QApplication>

SVGHandler::SVGHandler(QObject *parent) : QObject(parent)
{

}


const QPixmap SVGHandler::loadSvg(const QString &fileName)
{
    int size = 24;
    const auto ratio = qApp->devicePixelRatio();
    if ( 2 == ratio) {
        size = 48;
    } else if (3 == ratio) {
        size = 96;
    }
    QPixmap pixmap(size, size);
    QSvgRenderer renderer(fileName);
    pixmap.fill(Qt::transparent);

    QPainter painter;
    painter.begin(&pixmap);
    renderer.render(&painter);
    painter.end();

    pixmap.setDevicePixelRatio(ratio);
    return pixmap;
}

const QPixmap SVGHandler::loadSvgColor(const QString &path, const QString color, int size)
{
    int origSize = size;
    const auto ratio = qApp->devicePixelRatio();
    if ( 2 == ratio) {
        size += origSize;
    } else if (3 == ratio) {
        size += origSize;
    }
    QPixmap pixmap(size, size);
    QSvgRenderer renderer(path);
    pixmap.fill(Qt::transparent);

    QPainter painter;
    painter.begin(&pixmap);
    renderer.render(&painter);
    painter.end();

    pixmap.setDevicePixelRatio(ratio);
    return drawSymbolicColoredPixmap(pixmap, color);
}

QPixmap SVGHandler::drawSymbolicColoredPixmap(const QPixmap &source, QString cgColor)
{
    QImage img = source.toImage();
    for (int x = 0; x < img.width(); x++) {
        for (int y = 0; y < img.height(); y++) {
            auto color = img.pixelColor(x, y);
            if (color.alpha() > 0) {
                if ( "white" == cgColor) {
                    color.setRed(255);
                    color.setGreen(255);
                    color.setBlue(255);
                    img.setPixelColor(x, y, color);
                } else if( "black" == cgColor) {
                    color.setRed(0);
                    color.setGreen(0);
                    color.setBlue(0);
                    img.setPixelColor(x, y, color);
                } else if ("gray"== cgColor) {
                    color.setRed(152);
                    color.setGreen(163);
                    color.setBlue(164);
                    img.setPixelColor(x, y, color);
                } else if ("blue" == cgColor){
                    color.setRed(61);
                    color.setGreen(107);
                    color.setBlue(229);
                    img.setPixelColor(x, y, color);
                } else {
                    return source;
                }
            }
        }
    }
    return QPixmap::fromImage(img);
}