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author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 09:18:55 (GMT) |
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committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 09:18:55 (GMT) |
commit | e5fcad302d86d316390c6b0f62759a067313e8a9 (patch) | |
tree | c2afbf6f1066b6ce261f14341cf6d310e5595bc1 /doc/src/wince-opengl.qdoc | |
download | Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.zip Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.gz Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.bz2 |
Long live Qt 4.5!
Diffstat (limited to 'doc/src/wince-opengl.qdoc')
-rw-r--r-- | doc/src/wince-opengl.qdoc | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/doc/src/wince-opengl.qdoc b/doc/src/wince-opengl.qdoc new file mode 100644 index 0000000..b151aa9 --- /dev/null +++ b/doc/src/wince-opengl.qdoc @@ -0,0 +1,98 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \page windowsce-opengl.html + \title Windows CE OpenGL ES + \ingroup qtce + \brief Information about support for OpenGL ES with Qt for Windows CE. + + \section1 Introduction + + \l {http://www.opengl.org}{OpenGL} is an industry standard API for 2D/3D + graphics. It provides a powerful, low-level interface between software + and acceleration hardware, and it is operating system and window system + independent. + + \l {http://www.khronos.org/opengles}{OpenGL ES} is a subset of the + \l {http://www.opengl.org}{OpenGL} standard. It is meant for use in + embedded systems. Hence, it has a smaller, more constrained API. + + Qt for Windows CE uses EGL 1.1 to embed OpenGL ES windows within the + Windows CE window manager. + + To use OpenGL ES enabled widgets in a Qt for Windows CE application, you + only need to subclass QGLWidget and draw on instances of the subclass with + OpenGL ES functions. + + OpenGL ES includes profiles for floating-point and fixed-point arithmetic. + The floating point profile is called OpenGL ES CM (Common) and the + fixed-point profile is called OpenGL ES CL (Common Lite). + + You can run \c{configure} with the \c{-opengl-es-cm} option for the Common + profile or \c{-opengl-es-cl} for the Common Lite profile. In both cases, + ensure that the \c{lib} and \c{includes} paths include the OpenGL ES + headers and libararies from your SDK. The OpenGL ES lib should be called + either \c{libGLES_CM.lib} for the Common profile or \c{libGLES_CL.lib} + for the Common Lite profile. + + To configure Qt for Windows Mobile 5.0 and OpenGL ES Common Lite support + you can run \c{configure} like this: + + \snippet doc/src/snippets/code/doc_src_wince-opengl.qdoc 0 + + The distinction between the Common and Common Lite profiles is important, + because the Common Lite profile has less functionality and only supports a + fixed-point vertex format. + + To start programming with Qt and OpenGL ES on Windows CE, you can start + with the \l{Hello GL ES Example}. This example shows how to use QGLWidget + and QGLPainter with OpenGL ES. It also provides some hints on how to port + OpenGL code to OpenGL ES. + + \section2 Using OpenGL to Accelerate Normal 2D Painting + + Qt provides QOpenGLPaintEngine, a subclass of QPaintEngine that translates + QPainter operations into OpenGL calls. This is especially convenient for + drawing text or QImage objects in an OpenGL ES context. For further + details, refer to the \l{Hello GL ES Example}. + +*/ |