/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#include <skia/zone.hxx>

#include <officecfg/Office/Common.hxx>
#include <com/sun/star/util/XFlushable.hpp>
#include <com/sun/star/configuration/theDefaultProvider.hpp>

#include <sal/log.hxx>
#include <o3tl/unreachable.hxx>

#include <vcl/skia/SkiaHelper.hxx>

#include <config_skia.h>

using namespace SkiaHelper;

/**
 * Called from a signal handler or watchdog thread if we get
 * a crash or hang in some driver.
 */
void SkiaZone::hardDisable()
{
    // protect ourselves from double calling etc.
    static bool bDisabled = false;
    if (bDisabled)
        return;

    bDisabled = true;

    // Instead of disabling Skia as a whole, only force the CPU-based
    // raster mode, which should be safe as it does not use drivers.
    std::shared_ptr<comphelper::ConfigurationChanges> xChanges(
        comphelper::ConfigurationChanges::create());
    officecfg::Office::Common::VCL::ForceSkiaRaster::set(true, xChanges);
    xChanges->commit();

    // Force synchronous config write
    css::uno::Reference<css::util::XFlushable>(
        css::configuration::theDefaultProvider::get(comphelper::getProcessComponentContext()),
        css::uno::UNO_QUERY_THROW)
        ->flush();
}

void SkiaZone::checkDebug(int nUnchanged, const CrashWatchdogTimingsValues& aTimingValues)
{
    SAL_INFO("vcl.watchdog", "Skia watchdog - unchanged "
                                 << nUnchanged << " enter count " << enterCount()
                                 << " breakpoints mid: " << aTimingValues.mnDisableEntries
                                 << " max " << aTimingValues.mnAbortAfter);
}

const CrashWatchdogTimingsValues& SkiaZone::getCrashWatchdogTimingsValues()
{
    switch (renderMethodToUse())
    {
        case RenderVulkan:
        case RenderMetal:
        {
#if defined(SK_RELEASE)
            static const CrashWatchdogTimingsValues gpuValues = { 6, 20 }; /* 1.5s,  5s */
#elif defined(SK_DEBUG)
            static const CrashWatchdogTimingsValues gpuValues = { 60, 200 }; /* 15s,  50s */
#else
#error Unknown Skia debug/release setting.
#endif
            return gpuValues;
        }
        case RenderRaster:
        {
            // CPU-based operations with large images may take a noticeably long time,
            // so use large values. CPU-based rendering shouldn't use any unstable drivers anyway.
            static const CrashWatchdogTimingsValues rasterValues = { 600, 2000 }; /* 150s,  500s */
            return rasterValues;
        }
    }
    O3TL_UNREACHABLE;
}

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