Qt 4.8
qvolatileimagedata.cpp
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41 
42 #include "qvolatileimagedata_p.h"
43 #include <QtGui/qpaintengine.h>
44 
46 
48  : pengine(0)
49 {
50 }
51 
53  : pengine(0)
54 {
55  image = QImage(w, h, format);
56 }
57 
59  : pengine(0)
60 {
61  image = sourceImage;
62 }
63 
65  : pengine(0)
66 {
67  // Not supported.
68 }
69 
71  : QSharedData()
72 {
73  image = other.image;
74  // The detach is not mandatory here but we do it nonetheless in order to
75  // keep the behavior consistent with other platforms.
76  image.detach();
77  pengine = 0;
78 }
79 
81 {
82  delete pengine;
83 }
84 
86 {
87  // nothing to do here
88 }
89 
90 void QVolatileImageData::endDataAccess(bool readOnly) const
91 {
92  Q_UNUSED(readOnly);
93  // nothing to do here
94 }
95 
97 {
98  if (image.format() != format) {
99  image = image.convertToFormat(format);
100  }
101  return true;
102 }
103 
105 {
106  return 0;
107 }
108 
110 {
111  // nothing to do here
112 }
113 
Format
The following image formats are available in Qt.
Definition: qimage.h:91
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
void beginDataAccess() const
bool ensureFormat(QImage::Format format)
void endDataAccess(bool readOnly=false) const
Format format() const
Returns the format of the image.
Definition: qimage.cpp:2305
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
void detach()
If multiple images share common data, this image makes a copy of the data and detaches itself from th...
Definition: qimage.cpp:1359
The QImage class provides a hardware-independent image representation that allows direct access to th...
Definition: qimage.h:87
QImage convertToFormat(Format f, Qt::ImageConversionFlags flags=Qt::AutoColor) const Q_REQUIRED_RESULT
Returns a copy of the image in the given format.
Definition: qimage.cpp:3966
The QSharedData class is a base class for shared data objects.
Definition: qshareddata.h:56
#define Q_UNUSED(x)
Indicates to the compiler that the parameter with the specified name is not used in the body of a fun...
Definition: qglobal.h:1729
void * duplicateNativeImage() const