1 files changed, 122 insertions, 0 deletions
diff --git a/src/widgets/kernel/qwidgetrepaintmanager_p.h b/src/widgets/kernel/qwidgetrepaintmanager_p.h
new file mode 100644
index 0000000000..4378974610
--- /dev/null
+++ b/src/widgets/kernel/qwidgetrepaintmanager_p.h
@@ -0,0 +1,122 @@
+// Copyright (C) 2016 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 QWIDGETREPAINTMANAGER_P_H
+#define QWIDGETREPAINTMANAGER_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 <QtWidgets/private/qtwidgetsglobal_p.h>
+#include <QDebug>
+#include <QtWidgets/qwidget.h>
+#include <private/qwidget_p.h>
+#include <QtGui/qbackingstore.h>
+
+QT_BEGIN_NAMESPACE
+
+class QPlatformTextureList;
+class QPlatformTextureListWatcher;
+class QWidgetRepaintManager;
+class QRhi;
+class QRhiSwapChain;
+
+class Q_WIDGETS_EXPORT QWidgetRepaintManager
+{
+    Q_GADGET
+public:
+    enum UpdateTime {
+        UpdateNow,
+        UpdateLater
+    };
+    Q_ENUM(UpdateTime)
+
+    enum BufferState{
+        BufferValid,
+        BufferInvalid
+    };
+    Q_ENUM(BufferState)
+
+    QWidgetRepaintManager(QWidget *t);
+    ~QWidgetRepaintManager();
+
+    QBackingStore *backingStore() const { return store; }
+    void setBackingStore(QBackingStore *backingStore) { store = backingStore; }
+
+    template <class T>
+    void markDirty(const T &r, QWidget *widget, UpdateTime updateTime = UpdateLater,
+                   BufferState bufferState = BufferValid);
+
+    void removeDirtyWidget(QWidget *w);
+
+    void sync(QWidget *exposedWidget, const QRegion &exposedRegion);
+    void sync();
+
+    void markNeedsFlush(QWidget *widget, const QRegion &region, const QPoint &topLevelOffset);
+
+    void addStaticWidget(QWidget *widget);
+    void moveStaticWidgets(QWidget *reparented);
+    void removeStaticWidget(QWidget *widget);
+    QRegion staticContents(QWidget *widget = nullptr, const QRect &withinClipRect = QRect()) const;
+    QRegion dirtyRegion() const { return dirty; }
+    QList<QWidget *> dirtyWidgetList() const { return dirtyWidgets; }
+    bool isDirty() const;
+
+    bool bltRect(const QRect &rect, int dx, int dy, QWidget *widget);
+
+    QRhi *rhi() const;
+
+private:
+    void updateLists(QWidget *widget);
+
+    void addDirtyWidget(QWidget *widget, const QRegion &rgn);
+    void resetWidget(QWidget *widget);
+
+    void addDirtyRenderToTextureWidget(QWidget *widget);
+
+    void sendUpdateRequest(QWidget *widget, UpdateTime updateTime);
+
+    bool syncAllowed();
+    void paintAndFlush();
+
+    void markNeedsFlush(QWidget *widget, const QRegion &region = QRegion());
+
+    void flush();
+    void flush(QWidget *widget, const QRegion &region, QPlatformTextureList *widgetTextures);
+
+    bool hasStaticContents() const;
+    void updateStaticContentsSize();
+
+    QWidget *tlw = nullptr;
+    QBackingStore *store = nullptr;
+
+    QRegion dirty; // needsRepaint
+    QList<QWidget *> dirtyWidgets;
+    QList<QWidget *> dirtyRenderToTextureWidgets;
+
+    QRegion topLevelNeedsFlush;
+    QList<QWidget *> needsFlushWidgets;
+
+    QList<QWidget *> staticWidgets;
+
+    QPlatformTextureListWatcher *textureListWatcher = nullptr;
+
+    bool updateRequestSent = false;
+
+    QElapsedTimer perfTime;
+    int perfFrames = 0;
+
+    Q_DISABLE_COPY_MOVE(QWidgetRepaintManager)
+};
+
+QT_END_NAMESPACE
+
+#endif // QWIDGETREPAINTMANAGER_P_H