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// SPDX-License-Identifier: GPL-3.0-only
// SPDX-FileCopyrightText: 2026 Project Tick
// SPDX-FileContributor: Project Tick Team
/*
* ProjT Launcher - Minecraft Launcher
* Copyright (C) 2026 Project Tick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
#include <QCoreApplication>
#include <QDebug>
#include <QPixmapCache>
#include <QThread>
#include <QTime>
#include <limits>
#define GET_TYPE() \
Qt::ConnectionType type; \
if (QThread::currentThread() != QCoreApplication::instance()->thread()) \
type = Qt::BlockingQueuedConnection; \
else \
type = Qt::DirectConnection;
#define DEFINE_FUNC_NO_PARAM(NAME, RET_TYPE) \
static RET_TYPE NAME() \
{ \
RET_TYPE ret; \
GET_TYPE() \
QMetaObject::invokeMethod(s_instance, "_" #NAME, type, Q_RETURN_ARG(RET_TYPE, ret)); \
return ret; \
}
#define DEFINE_FUNC_ONE_PARAM(NAME, RET_TYPE, PARAM_1_TYPE) \
static RET_TYPE NAME(PARAM_1_TYPE p1) \
{ \
RET_TYPE ret; \
GET_TYPE() \
QMetaObject::invokeMethod(s_instance, "_" #NAME, type, Q_RETURN_ARG(RET_TYPE, ret), Q_ARG(PARAM_1_TYPE, p1)); \
return ret; \
}
#define DEFINE_FUNC_TWO_PARAM(NAME, RET_TYPE, PARAM_1_TYPE, PARAM_2_TYPE) \
static RET_TYPE NAME(PARAM_1_TYPE p1, PARAM_2_TYPE p2) \
{ \
RET_TYPE ret; \
GET_TYPE() \
QMetaObject::invokeMethod(s_instance, \
"_" #NAME, \
type, \
Q_RETURN_ARG(RET_TYPE, ret), \
Q_ARG(PARAM_1_TYPE, p1), \
Q_ARG(PARAM_2_TYPE, p2)); \
return ret; \
}
/** A wrapper around QPixmapCache with thread affinity with the main thread.
*/
class PixmapCache final : public QObject
{
Q_OBJECT
public:
PixmapCache(QObject* parent) : QObject(parent)
{}
~PixmapCache() override = default;
static PixmapCache& instance()
{
return *s_instance;
}
static void setInstance(PixmapCache* i)
{
s_instance = i;
}
public:
DEFINE_FUNC_NO_PARAM(cacheLimit, int)
DEFINE_FUNC_NO_PARAM(clear, bool)
DEFINE_FUNC_TWO_PARAM(find, bool, const QString&, QPixmap*)
DEFINE_FUNC_TWO_PARAM(find, bool, const QPixmapCache::Key&, QPixmap*)
DEFINE_FUNC_TWO_PARAM(insert, bool, const QString&, const QPixmap&)
DEFINE_FUNC_ONE_PARAM(insert, QPixmapCache::Key, const QPixmap&)
DEFINE_FUNC_ONE_PARAM(remove, bool, const QString&)
DEFINE_FUNC_ONE_PARAM(remove, bool, const QPixmapCache::Key&)
DEFINE_FUNC_TWO_PARAM(replace, bool, const QPixmapCache::Key&, const QPixmap&)
DEFINE_FUNC_ONE_PARAM(setCacheLimit, bool, int)
DEFINE_FUNC_NO_PARAM(markCacheMissByEviciton, bool)
DEFINE_FUNC_ONE_PARAM(setFastEvictionThreshold, bool, int)
// NOTE: Every function returns something non-void to simplify the macros.
private slots:
int _cacheLimit()
{
return QPixmapCache::cacheLimit();
}
bool _clear()
{
QPixmapCache::clear();
return true;
}
bool _find(const QString& key, QPixmap* pixmap)
{
return QPixmapCache::find(key, pixmap);
}
bool _find(const QPixmapCache::Key& key, QPixmap* pixmap)
{
return QPixmapCache::find(key, pixmap);
}
bool _insert(const QString& key, const QPixmap& pixmap)
{
return QPixmapCache::insert(key, pixmap);
}
QPixmapCache::Key _insert(const QPixmap& pixmap)
{
return QPixmapCache::insert(pixmap);
}
bool _remove(const QString& key)
{
QPixmapCache::remove(key);
return true;
}
bool _remove(const QPixmapCache::Key& key)
{
QPixmapCache::remove(key);
return true;
}
bool _replace(const QPixmapCache::Key& key, const QPixmap& pixmap)
{
return QPixmapCache::replace(key, pixmap);
}
bool _setCacheLimit(int n)
{
QPixmapCache::setCacheLimit(n);
return true;
}
/**
* Mark that a cache miss occurred because of a eviction if too many of these occur too fast the cache size is
* increased
* @return if the cache size was increased
*/
bool _markCacheMissByEviciton()
{
static constexpr uint maxCache = static_cast<uint>(std::numeric_limits<int>::max()) / 4;
static constexpr uint step = 10240;
static constexpr int oneSecond = 1000;
auto now = QTime::currentTime();
if (!m_last_cache_miss_by_eviciton.isNull())
{
auto diff = m_last_cache_miss_by_eviciton.msecsTo(now);
if (diff < oneSecond)
{ // less than a second ago
++m_consecutive_fast_evicitons;
}
else
{
m_consecutive_fast_evicitons = 0;
}
}
m_last_cache_miss_by_eviciton = now;
if (m_consecutive_fast_evicitons >= m_consecutive_fast_evicitons_threshold)
{
// increase the cache size
uint newSize = _cacheLimit() + step;
if (newSize >= maxCache)
{ // increase it until you overflow :D
newSize = maxCache;
qDebug() << m_consecutive_fast_evicitons
<< tr("pixmap cache misses by eviction happened too fast, doing nothing as the cache size "
"reached it's limit");
}
else
{
qDebug() << m_consecutive_fast_evicitons
<< tr("pixmap cache misses by eviction happened too fast, increasing cache size to")
<< static_cast<int>(newSize);
}
_setCacheLimit(static_cast<int>(newSize));
m_consecutive_fast_evicitons = 0;
return true;
}
return false;
}
bool _setFastEvictionThreshold(int threshold)
{
m_consecutive_fast_evicitons_threshold = threshold;
return true;
}
private:
static PixmapCache* s_instance;
QTime m_last_cache_miss_by_eviciton;
int m_consecutive_fast_evicitons = 0;
int m_consecutive_fast_evicitons_threshold = 15;
};
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