diff options
Diffstat (limited to 'src/gui/doc/snippets/code/src_gui_opengl_qopenglfunctions.cpp')
-rw-r--r-- | src/gui/doc/snippets/code/src_gui_opengl_qopenglfunctions.cpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/gui/doc/snippets/code/src_gui_opengl_qopenglfunctions.cpp b/src/gui/doc/snippets/code/src_gui_opengl_qopenglfunctions.cpp new file mode 100644 index 0000000000..e072c110f2 --- /dev/null +++ b/src/gui/doc/snippets/code/src_gui_opengl_qopenglfunctions.cpp @@ -0,0 +1,112 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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] + class MyGLWindow : public QWindow, protected QOpenGLFunctions + { + Q_OBJECT + public: + MyGLWindow(QScreen *screen = 0); + + protected: + void initializeGL(); + void paintGL(); + + QOpenGLContext *m_context; + }; + + MyGLWindow(QScreen *screen) + : QWindow(screen), QOpenGLWidget(parent) + { + setSurfaceType(OpenGLSurface); + create(); + + // Create an OpenGL context + m_context = new QOpenGLContext; + m_context->create(); + + // Setup scene and render it + initializeGL(); + paintGL(); + } + + void MyGLWindow::initializeGL() + { + m_context->makeCurrent(this); + initializeOpenGLFunctions(); + } +//! [0] + +//! [1] + void MyGLWindow::paintGL() + { + m_context->makeCurrent(this); + glActiveTexture(GL_TEXTURE1); + glBindTexture(GL_TEXTURE_2D, textureId); + ... + m_context->swapBuffers(this); + m_context->doneCurrent(); + } +//! [1] + +//! [2] + QOpenGLFunctions glFuncs(QOpenGLContext::currentContext()); + glFuncs.glActiveTexture(GL_TEXTURE1); +//! [2] + +//! [3] + QOpenGLFunctions *glFuncs = QOpenGLContext::currentContext()->functions(); + glFuncs->glActiveTexture(GL_TEXTURE1); +//! [3] + +//! [4] + QOpenGLFunctions funcs(QOpenGLContext::currentContext()); + bool npot = funcs.hasOpenGLFeature(QOpenGLFunctions::NPOTTextures); +//! [4] |