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Update qtgui.qdoc regarding OpenGL 

Change-Id: Ibda6987d005a1e42ebaef23b41ef18ae0b7ffa66
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
bb10
Laszlo Agocs 2014-04-07 10:55:50 +02:00 committed by The Qt Project
parent 82934f11e0
commit adde66f0dd
1 changed files with 34 additions and 16 deletions
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src/gui/doc/src/qtgui.qdoc
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@ -122,22 +122,40 @@
\section1 OpenGL and OpenGL ES integration
\section1 OpenGL and OpenGL ES Integration
QWindow supports rendering using desktop OpenGL, OpenGL ES 1.1 and
OpenGL ES 2.0, depending on what the platform supports. OpenGL
rendering is enabled by setting the QWindow's surface type to
QSurface::OpenGLSurface, choosing the format attributes with
QSurfaceFormat, and then creating a QOpenGLContext to manage
the native OpenGL context. In addition, Qt has QOpenGLPaintDevice,
which enables the use of OpenGL accelerated QPainter rendering, as well as
convenience classes that simplify the writing of OpenGL code and hides the
complexities of extension handling and the differences between OpenGL ES 2
and desktop OpenGL. The convenience classes include QOpenGLFunctions that
lets an application use all the OpenGL ES 2 functions on desktop OpenGL
without having to manually resolve the OpenGL function pointers and some
classes that wrap native OpenGL resources in a simpler Qt API:
QOpenGLBuffer, QOpenGLFramebufferObject, and QOpenGLShaderProgram.
QWindow supports rendering using OpenGL and OpenGL ES, depending
on what the platform supports. OpenGL rendering is enabled by
setting the QWindow's surface type to QSurface::OpenGLSurface,
choosing the format attributes with QSurfaceFormat, and then
creating a QOpenGLContext to manage the native OpenGL context. In
addition, Qt has QOpenGLPaintDevice, which enables the use of
OpenGL accelerated QPainter rendering, as well as convenience
classes that simplify the writing of OpenGL code and hides the
complexities of extension handling and the differences between
OpenGL ES 2 and desktop OpenGL. The convenience classes include
QOpenGLFunctions that lets an application use all the OpenGL ES 2
functions on desktop OpenGL without having to manually resolve the
OpenGL function pointers, thus allowing cross-platform development
of applications targeting mobile or embedded devices, and some
classes that wrap native OpenGL functionality in a simpler Qt API:
\list
\li QOpenGLBuffer
\li QOpenGLFramebufferObject
\li QOpenGLShaderProgram
\li QOpenGLTexture
\li QOpenGLDebugLogger
\li QOpenGLTimerQuery
\li QOpenGLVertexArrayObject
\endlist
Finally, in order to provide better support for the newer versions
(3.0 and higher) of OpenGL, a versioned function wrapper mechanism
is also available: The QOpenGLFunction_N_N family of classes
expose all the functions in a given OpenGL version and profile,
allowing easy development of desktop applications relying on
modern, desktop-only OpenGL features.
For more information, see the \l {OpenGL Window Example}.
@ -147,7 +165,7 @@
A \l {QWindow} created with the \l {QSurface::OpenGLSurface} can
be used in combination with \l QPainter and \l QOpenGLPaintDevice
to have OpenGL hardware accellerated 2D graphics, by sacrificing
to have OpenGL hardware accelerated 2D graphics, by sacrificing
some of the visual quality.