main.cpp - mozsearch

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// Copyright (C) 2026 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QEventLoop>

#include <QGuiApplication>

#include <QImage>

#include <QPainter>

#include <QTimer>

#include <QtGlobal>

#include <QtLottie/private/qlottieanimation_p.h>

class QLottieAnimationFuzzer : public QLottieAnimation

    Q_OBJECT

public:

    explicit QLottieAnimationFuzzer(QQuickItem *parent = nullptr)

        : QLottieAnimation(parent)

    void fuzzRender(const QByteArray &jsonSource)

        // Go through the full pipeline: parse + batch renderer registration

        loadFinished(jsonSource);

        if (m_status != QLottieAnimation::Ready)

            return;

        // Wait for the batch renderer to produce the first frame.

        // Poll via renderNextFrame() which calls getFrame() internally;

        // once it returns without setting m_waitForFrameConn the frame

        // is in the cache and paint() will draw something.

        QDeadlineTimer deadline(500);

        while (!deadline.hasExpired()) {

            renderNextFrame();

            if (!m_waitForFrameConn)

                break;

            QCoreApplication::processEvents(QEventLoop::AllEvents, 10);

        // Exercise the rendering pipeline with a bounded offscreen image

        const int w = qBound(1, qRound(m_animWidth), 4096);

        const int h = qBound(1, qRound(m_animHeight), 4096);

        QImage image(w, h, QImage::Format_ARGB32_Premultiplied);

        QPainter painter(&image);

        paint(&painter);

};

// silence warnings

static QtMessageHandler mh = qInstallMessageHandler([](QtMsgType, const QMessageLogContext &,

                                                       const QString &) {});

extern "C" int LLVMFuzzerTestOneInput(const char *Data, size_t Size) {

    static int argc = 3;

    static char arg1[] = "fuzzer";

    static char arg2[] = "-platform";

    static char arg3[] = "minimal";

    static char *argv[] = {arg1, arg2, arg3, nullptr};

    static QGuiApplication qga(argc, argv);

    static QLottieAnimationFuzzer lottie;

    lottie.fuzzRender(QByteArray::fromRawData(Data, Size));

    return 0;

#include "main.moc"