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qglpaintdevice_p.h
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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#ifndef QGLPAINTDEVICE_P_H
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#define QGLPAINTDEVICE_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of the QtOpenGL module. This header file may change from
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// version to version without notice, or even be removed.
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//
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// We mean it.
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//
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#include <
qpaintdevice.h
>
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#include <
qgl.h
>
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QT_BEGIN_NAMESPACE
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class
Q_OPENGL_EXPORT
QGLPaintDevice
:
public
QPaintDevice
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{
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public
:
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QGLPaintDevice
();
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virtual
~
QGLPaintDevice
();
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int
devType
()
const
{
return
QInternal::OpenGL
;}
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virtual
void
beginPaint();
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virtual
void
ensureActiveTarget();
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virtual
void
endPaint();
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virtual
QGLContext
* context()
const
= 0;
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virtual
QGLFormat
format
()
const
;
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virtual
QSize
size()
const
= 0;
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virtual
bool
alphaRequested()
const
;
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virtual
bool
isFlipped()
const
;
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// returns the QGLPaintDevice for the given QPaintDevice
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static
QGLPaintDevice
* getDevice(
QPaintDevice
*);
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protected
:
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int
metric
(
QPaintDevice::PaintDeviceMetric
metric)
const
;
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GLuint
m_previousFBO
;
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GLuint
m_thisFBO
;
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};
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// Wraps a QGLWidget
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class
QGLWidget
;
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class
QGLWidgetGLPaintDevice
:
public
QGLPaintDevice
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{
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public
:
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QGLWidgetGLPaintDevice
();
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virtual
QPaintEngine
* paintEngine()
const
;
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// QGLWidgets need to do swapBufers in endPaint:
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virtual
void
beginPaint();
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virtual
void
endPaint();
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virtual
QSize
size()
const
;
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virtual
QGLContext
* context()
const
;
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void
setWidget(
QGLWidget
*);
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private
:
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friend
class
QGLWidget
;
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QGLWidget
*
glWidget
;
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};
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QT_END_NAMESPACE
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#endif // QGLPAINTDEVICE_P_H
qgl.h
QT_END_NAMESPACE
#define QT_END_NAMESPACE
This macro expands to.
Definition:
qglobal.h:90
Q_OPENGL_EXPORT
#define Q_OPENGL_EXPORT
Definition:
qglobal.h:1455
QGLWidgetGLPaintDevice
Definition:
qglpaintdevice_p.h:93
QPaintDevice::PaintDeviceMetric
PaintDeviceMetric
Definition:
qpaintdevice.h:63
QGLPaintDevice
Definition:
qglpaintdevice_p.h:63
QT_BEGIN_NAMESPACE
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition:
qglobal.h:89
QPaintDevice
Definition:
qpaintdevice.h:60
QGLFormat
The QGLFormat class specifies the display format of an OpenGL rendering context.
Definition:
qgl.h:175
QGLContext
The QGLContext class encapsulates an OpenGL rendering context.
Definition:
qgl.h:310
QGLPaintDevice::m_previousFBO
GLuint m_previousFBO
Definition:
qglpaintdevice_p.h:86
QPaintEngine
The QPaintEngine class provides an abstract definition of how QPainter draws to a given device on a g...
Definition:
qpaintengine.h:90
QGLWidgetGLPaintDevice::glWidget
QGLWidget * glWidget
Definition:
qglpaintdevice_p.h:110
QGLWidget
The QGLWidget class is a widget for rendering OpenGL graphics.
Definition:
qgl.h:474
format
format
Definition:
qprintengine_ps.cpp:286
QInternal::OpenGL
Definition:
qnamespace.h:1834
QGLPaintDevice::devType
int devType() const
Definition:
qglpaintdevice_p.h:69
QGLPaintDevice::m_thisFBO
GLuint m_thisFBO
Definition:
qglpaintdevice_p.h:87
QPaintDevice::metric
virtual int metric(PaintDeviceMetric metric) const
Definition:
qpaintdevice.cpp:63
QSize
The QSize class defines the size of a two-dimensional object using integer point precision.
Definition:
qsize.h:53
qpaintdevice.h
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