|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the documentation of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 /*! |
|
43 \page windowsce-opengl.html |
|
44 \title Qt for Windows CE and OpenGL ES |
|
45 \ingroup qtce |
|
46 \brief Information about support for OpenGL ES with Qt for Windows CE. |
|
47 |
|
48 \input platforms/emb-opengl.qdocinc |
|
49 |
|
50 \section1 Using OpenGL with Qt for Windows CE |
|
51 Qt for Windows CE uses EGL 1.1 to embed OpenGL ES windows within the |
|
52 Windows CE window manager. |
|
53 |
|
54 \section2 Configure |
|
55 |
|
56 To configure Qt for Windows Mobile 5.0 and OpenGL ES Common Lite support |
|
57 you can run \c{configure} like this: |
|
58 |
|
59 \snippet doc/src/snippets/code/doc_src_wince-opengl.qdoc 0 |
|
60 |
|
61 OpenGL ES includes profiles for floating-point and fixed-point arithmetic. |
|
62 The floating point profile is called OpenGL ES CM (Common) and the |
|
63 fixed-point profile is called OpenGL ES CL (Common Lite). |
|
64 |
|
65 You can run \c{configure} with the \c{-opengl-es-cm} option for the Common |
|
66 profile or \c{-opengl-es-cl} for the Common Lite profile. In both cases, |
|
67 ensure that the \c{lib} and \c{includes} paths include the OpenGL ES |
|
68 headers and libararies from your SDK. The OpenGL ES lib should be called |
|
69 either \c{libGLES_CM.lib} for the Common profile or \c{libGLES_CL.lib} for |
|
70 the Common Lite profile. |
|
71 |
|
72 The distinction between the Common and Common Lite profiles is important, |
|
73 because the Common Lite profile has less functionality and only supports a |
|
74 fixed-point vertex format. |
|
75 |
|
76 To start programming with Qt and OpenGL ES on Windows CE, you can start |
|
77 with the \l{Hello GL ES Example}. This example shows how to use QGLWidget |
|
78 and QGLPainter with OpenGL ES. It also provides some hints on how to port |
|
79 OpenGL code to OpenGL ES. |
|
80 |
|
81 \section2 Using OpenGL to Accelerate Normal 2D Painting |
|
82 |
|
83 Qt provides QOpenGLPaintEngine, a subclass of QPaintEngine that translates |
|
84 QPainter operations into OpenGL calls. This is especially convenient for |
|
85 drawing text or QImage objects in an OpenGL ES context. For further |
|
86 details, refer to the \l{Hello GL ES Example}. |
|
87 |
|
88 */ |