1 files changed, 100 insertions, 0 deletions
diff --git a/src/gui/doc/snippets/code/src_gui_opengl_qopengldebug.cpp b/src/gui/doc/snippets/code/src_gui_opengl_qopengldebug.cpp
new file mode 100644
index 0000000000..e82447a174
--- /dev/null
+++ b/src/gui/doc/snippets/code/src_gui_opengl_qopengldebug.cpp
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** 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]
+    GLenum error = GL_NO_ERROR;
+    do {
+        error = glGetError();
+        if (error != GL_NO_ERROR)
+            // handle the error
+    } while (error != GL_NO_ERROR);
+//! [0]
+
+//! [1]
+    QSurfaceFormat format;
+    // asks for a OpenGL 3.2 debug context using the Core profile
+    format.setMajorVersion(3);
+    format.setMinorVersion(2);
+    format.setProfile(QSurfaceFormat::CoreProfile);
+    format.setOption(QSurfaceFormat::DebugContext);
+
+    QOpenGLContext *context = new QOpenGLContext;
+    context->setFormat(format);
+    context->create();
+//! [1]
+
+//! [2]
+    QOpenGLContext *ctx = QOpenGLContext::currentContext();
+    QOpenGLDebugLogger *logger = new QOpenGLDebugLogger(this);
+
+    logger->initialize(); // initializes in the current context, i.e. ctx
+//! [2]
+
+//! [3]
+    ctx->hasExtension(QByteArrayLiteral("GL_KHR_debug"))
+//! [3]
+
+//! [4]
+    const QList<QOpenGLDebugMessage> messages = logger->loggedMessages();
+    for (const QOpenGLDebugMessage &message : messages)
+        qDebug() << message;
+//! [4]
+
+//! [5]
+    connect(logger, &QOpenGLDebugLogger::messageLogged, receiver, &LogHandler::handleLoggedMessage);
+    logger->startLogging();
+//! [5]
+
+//! [6]
+    QOpenGLDebugMessage message =
+        QOpenGLDebugMessage::createApplicationMessage(QStringLiteral("Custom message"));
+
+    logger->logMessage(message);
+//! [6]