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39
40#ifndef QSGAREAALLOCATOR_P_H
41#define QSGAREAALLOCATOR_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <private/qtquickglobal_p.h>
55#include <QtCore/qsize.h>
56
57QT_BEGIN_NAMESPACE
58
59class QRect;
60class QPoint;
61struct QSGAreaAllocatorNode;
62class Q_QUICK_PRIVATE_EXPORT QSGAreaAllocator
63{
64public:
65 QSGAreaAllocator(const QSize &size);
66 ~QSGAreaAllocator();
67
68 QRect allocate(const QSize &size);
69 bool deallocate(const QRect &rect);
70 bool isEmpty() const { return m_root == nullptr; }
71 QSize size() const { return m_size; }
72
73 QByteArray serialize();
74 const char *deserialize(const char *data, int size);
75
76private:
77 bool allocateInNode(const QSize &size, QPoint &result, const QRect &currentRect, QSGAreaAllocatorNode *node);
78 bool deallocateInNode(const QPoint &pos, QSGAreaAllocatorNode *node);
79 void mergeNodeWithNeighbors(QSGAreaAllocatorNode *node);
80
81 QSGAreaAllocatorNode *m_root;
82 QSize m_size;
83};
84
85QT_END_NAMESPACE
86
87#endif
88

source code of qtdeclarative/src/quick/scenegraph/util/qsgareaallocator_p.h