Qt 4.8
qtgahandler.cpp
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41 
42 #include "qtgahandler.h"
43 #include "qtgafile.h"
44 
45 #include <QtCore/QVariant>
46 #include <QtCore/QDebug>
47 #include <QtGui/QImage>
48 
50 
52  : QImageIOHandler()
53  , tga(0)
54 {
55 }
56 
58 {
59  delete tga;
60 }
61 
63 {
64  if (!tga)
65  tga = new QTgaFile(device());
66  if (tga->isValid())
67  {
68  setFormat("tga");
69  return true;
70  }
71  return false;
72 }
73 
75 {
76  if (!device) {
77  qWarning("QTgaHandler::canRead() called with no device");
78  return false;
79  }
80  QTgaFile tga(device);
81  return tga.isValid();
82 }
83 
85 {
86  if (!canRead())
87  return false;
88  *image = tga->readImage();
89  return !image->isNull();
90 }
91 
93 {
94  return "tga";
95 }
96 
98 {
99  if (option == Size && canRead()) {
100  return tga->size();
101  } else if (option == CompressionRatio) {
102  return tga->compression();
103  } else if (option == ImageFormat) {
104  return QImage::Format_ARGB32;
105  }
106  return QVariant();
107 }
108 
110 {
111  Q_UNUSED(option);
112  Q_UNUSED(value);
113 }
114 
116 {
117  return option == CompressionRatio
118  || option == Size
119  || option == ImageFormat;
120 }
121 
The QVariant class acts like a union for the most common Qt data types.
Definition: qvariant.h:92
Compression compression() const
Definition: qtgafile.h:151
void setFormat(const QByteArray &format)
Sets the format of the QImageIOHandler to format.
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
void setOption(ImageOption option, const QVariant &value)
Sets the option option with the value value.
bool isNull() const
Returns true if it is a null image, otherwise returns false.
Definition: qimage.cpp:1542
The QByteArray class provides an array of bytes.
Definition: qbytearray.h:135
QVariant option(ImageOption option) const
Returns the value assigned to option as a QVariant.
Definition: qtgahandler.cpp:97
bool supportsOption(ImageOption option) const
Returns true if the QImageIOHandler supports the option option; otherwise returns false...
QImage readImage()
Reads an image file from the QTgaFile&#39;s device, and returns it.
Definition: qtgafile.cpp:220
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
bool canRead() const
Returns true if an image can be read from the device (i.
Definition: qtgahandler.cpp:62
ImageOption
This enum describes the different options supported by QImageIOHandler.
Q_CORE_EXPORT void qWarning(const char *,...)
The QImage class provides a hardware-independent image representation that allows direct access to th...
Definition: qimage.h:87
QByteArray name() const
Use format() instead.
Definition: qtgahandler.cpp:92
QTgaFile * tga
Definition: qtgahandler.h:69
The QImageIOHandler class defines the common image I/O interface for all image formats in Qt...
QIODevice * device() const
Returns the device currently assigned to the QImageIOHandler.
bool isValid() const
Definition: qtgafile.h:104
bool read(QImage *image)
Read an image from the device, and stores it in image.
Definition: qtgahandler.cpp:84
The QIODevice class is the base interface class of all I/O devices in Qt.
Definition: qiodevice.h:66
#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
QSize size() const
Definition: qtgafile.h:146