Qt 4.8
qimagevideobuffer.cpp
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41 
42 #include "qimagevideobuffer_p.h"
43 
44 #include <private/qabstractvideobuffer_p.h>
45 
46 #include <qimage.h>
47 #include <qvariant.h>
48 
50 
52 {
53 public:
55  : mapMode(QAbstractVideoBuffer::NotMapped)
56  {
57  }
58 
61 };
62 
65 {
67 
68  d->image = image;
69 }
70 
72 {
73 }
74 
76 {
77  return d_func()->mapMode;
78 }
79 
80 uchar *QImageVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine)
81 {
83 
84  if (d->mapMode == NotMapped && d->image.bits() && mode != NotMapped) {
85  d->mapMode = mode;
86 
87  if (numBytes)
88  *numBytes = d->image.byteCount();
89 
90  if (bytesPerLine)
91  *bytesPerLine = d->image.bytesPerLine();
92 
93  return d->image.bits();
94  } else {
95  return 0;
96  }
97 }
98 
100 {
102 
103  d->mapMode = NotMapped;
104 }
105 
double d
Definition: qnumeric_p.h:62
MapMode
Enumerates how a video buffer&#39;s data is mapped to memory.
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
QAbstractVideoBuffer::MapMode mapMode
#define Q_D(Class)
Definition: qglobal.h:2482
MapMode mapMode() const
Returns the mode a video buffer is mapped in.
unsigned char uchar
Definition: qglobal.h:994
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
The QImage class provides a hardware-independent image representation that allows direct access to th...
Definition: qimage.h:87
The QAbstractVideoBuffer class is an abstraction for video data.
uchar * map(MapMode mode, int *numBytes, int *bytesPerLine)
Maps the contents of a video buffer to memory.
void unmap()
Releases the memory mapped by the map() function.
QImageVideoBuffer(const QImage &image)