525d12bee5
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54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
/*
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SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
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*/
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#pragma once
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#include <KWaylandServer/kwaylandserver_export.h>
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#include <QRegion>
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#include <limits>
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#include <type_traits>
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struct wl_resource;
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namespace KWaylandServer
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{
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template<typename T>
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struct SafeGlobalDeleter {
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static inline void cleanup(T *global)
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{
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if (global) {
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global->remove();
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}
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}
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};
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template<typename T>
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using ScopedGlobalPointer = QScopedPointer<T, SafeGlobalDeleter<T>>;
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/**
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* Returns an infinite region.
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*/
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inline QRegion KWAYLANDSERVER_EXPORT infiniteRegion()
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{
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return QRegion(std::numeric_limits<int>::min() / 2, // "/ 2" is to avoid integer overflows
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std::numeric_limits<int>::min() / 2,
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std::numeric_limits<int>::max(),
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std::numeric_limits<int>::max());
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}
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template<typename T>
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T resource_cast(::wl_resource *resource)
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{
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using ObjectType = std::remove_pointer_t<std::remove_cv_t<T>>;
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if (auto resourceContainer = ObjectType::Resource::fromResource(resource)) {
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return static_cast<T>(resourceContainer->object());
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}
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return T();
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}
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} // namespace KWaylandServer
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