src/opengl/qglwindowsurface_qws.cpp

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  41
  42 #include <QtGui/QPaintDevice>
  43 #include <QtGui/QWidget>
  44 #include <QtOpenGL/QGLWidget>
  45 #include "private/qglwindowsurface_qws_p.h"
  46 #include "private/qglpaintdevice_qws_p.h"
  47 #include "private/qpaintengine_opengl_p.h"
  48
  49 QT_BEGIN_NAMESPACE
  50
  51 /*!
  52     \class QWSGLWindowSurface
  53     \since 4.3
  54     \ingroup qws
  55     \preliminary
  56
  57     \brief The QWSGLWindowSurface class provides the drawing area for top-level
  58     windows with Qt for Embedded Linux on EGL/OpenGL ES. It also provides the
  59     drawing area for \l{QGLWidget}s whether they are top-level windows or
  60     children of another QWidget.
  61
  62     Note that this class is only available in Qt for Embedded Linux and only
  63     available if Qt is configured with OpenGL support.
  64 */
  65
  66 class QWSGLWindowSurfacePrivate
  67 {
  68 public:
  69     QWSGLWindowSurfacePrivate() :
  70         qglContext(0), ownsContext(false) {}
  71
  72     QGLContext *qglContext;
  73     bool ownsContext;
  74 };
  75
  76 /*!
  77     Constructs an empty QWSGLWindowSurface for the given top-level \a window.
  78     The window surface is later initialized from chooseContext() and resources for it
  79     is typically allocated in setGeometry().
  80 */
  81 QWSGLWindowSurface::QWSGLWindowSurface(QWidget *window)
  82     : QWSWindowSurface(window),
  83       d_ptr(new QWSGLWindowSurfacePrivate)
  84 {
  85 }
  86
  87 /*!
  88     Constructs an empty QWSGLWindowSurface.
  89 */
  90 QWSGLWindowSurface::QWSGLWindowSurface()
  91     : d_ptr(new QWSGLWindowSurfacePrivate)
  92 {
  93 }
  94
  95 /*!
  96     Destroys the QWSGLWindowSurface object and frees any
  97     allocated resources.
  98  */
  99 QWSGLWindowSurface::~QWSGLWindowSurface()
 100 {
 101     Q_D(QWSGLWindowSurface);
 102     if (d->ownsContext)
 103         delete d->qglContext;
 104     delete d;
 105 }
 106
 107 /*!
 108     Returns the QGLContext of the window surface.
 109 */
 110 QGLContext *QWSGLWindowSurface::context() const
 111 {
 112     Q_D(const QWSGLWindowSurface);
 113     if (!d->qglContext) {
 114         QWSGLWindowSurface *that = const_cast<QWSGLWindowSurface*>(this);
 115         that->setContext(new QGLContext(QGLFormat::defaultFormat()));
 116         that->d_func()->ownsContext = true;
 117     }
 118     return d->qglContext;
 119 }
 120
 121 /*!
 122     Sets the QGLContext for this window surface to \a context.
 123 */
 124 void QWSGLWindowSurface::setContext(QGLContext *context)
 125 {
 126     Q_D(QWSGLWindowSurface);
 127     if (d->ownsContext) {
 128         delete d->qglContext;
 129         d->ownsContext = false;
 130     }
 131     d->qglContext = context;
 132 }
 133
 134 QT_END_NAMESPACE