Qt 4.8
qpixmapcache_p.h
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41 
42 #ifndef QPIXMAPCACHE_P_H
43 #define QPIXMAPCACHE_P_H
44 
45 //
46 // W A R N I N G
47 // -------------
48 //
49 // This file is not part of the Qt API. This header
50 // file may change from version to version without notice, or even be removed.
51 //
52 // We mean it.
53 //
54 
55 #include "qpixmapcache.h"
56 #include "qpaintengine.h"
57 #include <private/qimage_p.h>
58 #include <private/qpixmap_raster_p.h>
59 #include "qcache.h"
60 
62 
63 uint qHash(const QPixmapCache::Key &k);
64 
66 {
67 public:
68  KeyData() : isValid(true), key(0), ref(1) {}
69  KeyData(const KeyData &other)
70  : isValid(other.isValid), key(other.key), ref(1) {}
71  ~KeyData() {}
72 
73  bool isValid;
74  int key;
75  int ref;
76 };
77 
78 // XXX: hw: is this a general concept we need to abstract?
79 class QPixmapCacheEntry : public QPixmap
80 {
81 public:
82  QPixmapCacheEntry(const QPixmapCache::Key &key, const QPixmap &pix) : QPixmap(pix), key(key)
83  {
84  QPixmapData *pd = pixmapData();
85  if (pd && pd->classId() == QPixmapData::RasterClass) {
86  QRasterPixmapData *d = static_cast<QRasterPixmapData*>(pd);
87  if (!d->image.isNull() && d->image.d->paintEngine
88  && !d->image.d->paintEngine->isActive())
89  {
90  delete d->image.d->paintEngine;
91  d->image.d->paintEngine = 0;
92  }
93  }
94  }
97 };
98 
99 inline bool qIsDetached(QPixmapCacheEntry &t) { return t.isDetached(); }
100 
102 
103 #endif // QPIXMAPCACHE_P_H
double d
Definition: qnumeric_p.h:62
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
bool isNull() const
Returns true if it is a null image, otherwise returns false.
Definition: qimage.cpp:1542
QPixmapCacheEntry(const QPixmapCache::Key &key, const QPixmap &pix)
QImageData * d
Definition: qimage.h:336
KeyData(const KeyData &other)
QPixmapCache::Key key
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
bool isActive() const
Returns true if the paint engine is actively drawing; otherwise returns false.
Definition: qpaintengine.h:154
bool isDetached() const
Definition: qpixmap.cpp:1495
QPaintEngine * paintEngine
Definition: qimage_p.h:110
unsigned int uint
Definition: qglobal.h:996
ClassId classId() const
uint qHash(const QUrl &url)
Definition: qurl.h:285
The QPixmapCache::Key class can be used for efficient access to the QPixmapCache. ...
Definition: qpixmapcache.h:61
The QPixmap class is an off-screen image representation that can be used as a paint device...
Definition: qpixmap.h:71
bool qIsDetached(QPixmapCacheEntry &t)