1 files changed, 77 insertions, 0 deletions
diff --git a/src/gui/kernel/qpalette_p.h b/src/gui/kernel/qpalette_p.h
new file mode 100644
index 0000000000..ce7c30d66d
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+++ b/src/gui/kernel/qpalette_p.h
@@ -0,0 +1,77 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QPALETTE_P_H
+#define QPALETTE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qpalette.h"
+
+QT_BEGIN_NAMESPACE
+
+class Q_GUI_EXPORT QPalettePrivate
+{
+public:
+    class Data : public QSharedData {
+    public:
+        // Every instance of Data has to have a unique serial number, even
+        // if it gets created by copying another - we wouldn't create a copy
+        // in the first place if the serial number should be the same!
+        Data(const Data &other)
+            : QSharedData(other)
+        {
+            for (int grp = 0; grp < int(QPalette::NColorGroups); grp++) {
+                for (int role = 0; role < int(QPalette::NColorRoles); role++)
+                    br[grp][role] = other.br[grp][role];
+            }
+        }
+        Data() = default;
+
+        QBrush br[QPalette::NColorGroups][QPalette::NColorRoles];
+        const int ser_no = qt_palette_count++;
+    };
+
+    QPalettePrivate(const QExplicitlySharedDataPointer<Data> &data)
+        : ref(1), data(data)
+    { }
+    QPalettePrivate()
+        : QPalettePrivate(QExplicitlySharedDataPointer<Data>(new Data))
+    { }
+
+    static constexpr QPalette::ResolveMask colorRoleOffset(QPalette::ColorGroup colorGroup)
+    {
+        // Exclude NoRole; that bit is used for Accent
+        return (qToUnderlying(QPalette::NColorRoles) - 1) * qToUnderlying(colorGroup);
+    }
+
+    static constexpr QPalette::ResolveMask bitPosition(QPalette::ColorGroup colorGroup,
+                                                       QPalette::ColorRole colorRole)
+    {
+        // Map Accent into NoRole for resolving purposes
+        if (colorRole == QPalette::Accent)
+            colorRole = QPalette::NoRole;
+
+        return colorRole + colorRoleOffset(colorGroup);
+    }
+
+    QAtomicInt ref;
+    QPalette::ResolveMask resolveMask = {0};
+    static inline int qt_palette_count = 0;
+    static inline int qt_palette_private_count = 0;
+    int detach_no = ++qt_palette_private_count;
+    QExplicitlySharedDataPointer<Data> data;
+};
+
+QT_END_NAMESPACE
+
+#endif // QPALETTE_P_H