GifLoader.cpp

/*
	Copyright (c) 2017-2019 by Ilya Barykin
	Released under the MIT License.
	See the provided LICENSE.TXT file for details.
*/

#include "GifLoader.h"


GifLoader::GifLoader(ImageProvider *p) : prv(p) {
    g_mov = new QMovie;

    connect(g_mov, &QMovie::frameChanged, this, &GifLoader::nextFrame);
}

void GifLoader::loadImage(QString file) {
    prv->getWnd()->resetCoord();

    QString text;

    g_mov->setFileName(file);
    g_mov->start();

    text = QString("File: %1 | %2/%3 ");
    text = text.arg(file.remove(0, file.lastIndexOf('/') + 1))
            .arg(prv->getCurrent() + 1)
            .arg(prv->getSize());

    prv->setText(text);
}

void GifLoader::stop() {
    g_mov->stop();
}

void GifLoader::nextFrame(int i) {
    Q_UNUSED(i)

    QImage orig = g_mov->currentImage(), simg;

    simg = (orig.width() > prv->getWnd()->width() || orig.height() > prv->getWnd()->height()) ?
           orig.scaled(prv->getWnd()->size(), Qt::KeepAspectRatio, Qt::FastTransformation) : orig;

    int wH = prv->getWnd()->height();
    int wW = prv->getWnd()->width();
    float s1 = float(wH) / orig.height(), s2 = float(wW) / orig.width(), scale;
    scale = qMin(s1, s2);
    scale = scale > 1.0f ? 1.0f : scale;

    prv->setScale(scale);
    prv->setOriginalScale(scale);
    prv->setOriginal(orig);
    prv->setScaled(simg);
}