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Diffstat (limited to 'sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_opengl_qgl.cpp')
| -rw-r--r-- | sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_opengl_qgl.cpp | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_opengl_qgl.cpp b/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_opengl_qgl.cpp new file mode 100644 index 000000000..64c69aee9 --- /dev/null +++ b/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_opengl_qgl.cpp @@ -0,0 +1,168 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of PySide2. +** +** $QT_BEGIN_LICENSE:BSD$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +fmt = QGLFormat() +fmt.setAlpha(True) +fmt.setStereo(True) +QGLFormat.setDefaultFormat(fmt) +//! [0] + + +//! [1] +fmt = QGLFormat() +fmt.setDoubleBuffer(False) # single buffer +fmt.setDirectRendering(False) # software rendering +myWidget = MyGLWidget(fmt, ...) +//! [1] + + +//! [2] +fmt = QGLFormat() +fmt.setOverlay(True) +fmt.setStereo(True) +myWidget = MyGLWidget(fmt, ...) +if !myWidget.format().stereo(): + # ok, goggles off + if !myWidget.format().hasOverlay(): + print "Cool hardware required" +//! [2] + + +//! [3] +# The rendering in MyGLWidget depends on using +# stencil buffer and alpha channel + +class MyGLWidget(QGLWidget): + def __init__(self, parent): + QGLWidget.__init__(self, QGLFormat(QGL.StencilBuffer | QGL.AlphaChannel), parent) + + if !format().stencil(): + print "Could not get stencil buffer results will be suboptimal" + if !format().alpha(): + print "Could not get alpha channel results will be suboptimal" + ... +//! [3] + + +//! [4] +a = QApplication([]) +f = QGLFormat() +f.setDoubleBuffer(False) +QGLFormat.setDefaultFormat(f) +//! [4] + + +//! [5] +f = QGLFormat.defaultOverlayFormat() +f.setDoubleBuffer(True) +QGLFormat.setDefaultOverlayFormat(f) +//! [5] + + +//! [6] +# ...continued from above +myWidget = MyGLWidget(QGLFormat(QGL.HasOverlay), ...) +if myWidget.format().hasOverlay(): + # Yes, we got an overlay, let's check _its_ format: + olContext = myWidget.overlayContext() + if olContext.format().doubleBuffer(): + # yes, we got a double buffered overlay + else: + # no, only single buffered overlays are available +//! [6] + + +//! [7] +cx = QGLContext() +# ... +f = QGLFormat() +f.setStereo(True) +cx.setFormat(f) +if !cx.create(): + exit() # no OpenGL support, or cannot render on the specified paintdevice +if !cx.format().stereo(): + exit() # could not create stereo context +//! [7] + + +//! [8] +class MyGLDrawer(QGLWidget): + + def __init__(self, parent): + QGLWidget.__init__(self, parent) + pass + + def initializeGL(self): + # Set up the rendering context, define display lists etc.: + ... + glClearColor(0.0, 0.0, 0.0, 0.0) + glEnable(GL_DEPTH_TEST) + ... + + def resizeGL(self, w, h): + # setup viewport, projection etc.: + glViewport(0, 0, w, h) + ... + glFrustum(...) + ... + + def paintGL(self): + # draw the scene: + ... + glRotatef(...) + glMaterialfv(...) + glBegin(GL_QUADS) + glVertex3f(...) + glVertex3f(...) + ... + glEnd() + ... +//! [8] |