1 files changed, 95 insertions, 0 deletions
diff --git a/launcher/MTPixmapCache.h b/launcher/MTPixmapCache.h
new file mode 100644
index 00000000..57847a0e
--- /dev/null
+++ b/launcher/MTPixmapCache.h
@@ -0,0 +1,95 @@
+#pragma once
+
+#include <QCoreApplication>
+#include <QPixmapCache>
+#include <QThread>
+
+#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)
+
+    // 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;
+    }
+
+   private:
+    static PixmapCache* s_instance;
+};