b0042601ed
Cleanup the OpenGL examples - use nullptr (clang-tidy) - use member-initialization - avoid redundant checks for != nullptr when deleting a pointer Change-Id: I3e4702690ed79e71c3e952d51ceef83b907b45b7 Reviewed-by: Edward Welbourne <edward.welbourne@qt.io> Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
162 lines
4.2 KiB
C++
162 lines
4.2 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the documentation of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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** "Redistribution and use in source and binary forms, with or without
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "openglwindow.h"
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#include <QOpenGLContext>
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#include <QOpenGLPaintDevice>
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#include <QPainter>
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//! [1]
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OpenGLWindow::OpenGLWindow(QWindow *parent)
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: QWindow(parent)
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{
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setSurfaceType(QWindow::OpenGLSurface);
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}
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//! [1]
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OpenGLWindow::~OpenGLWindow()
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{
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delete m_device;
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}
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//! [2]
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void OpenGLWindow::render(QPainter *painter)
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{
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Q_UNUSED(painter);
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}
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void OpenGLWindow::initialize()
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{
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}
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void OpenGLWindow::render()
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{
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if (!m_device)
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m_device = new QOpenGLPaintDevice;
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
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m_device->setSize(size() * devicePixelRatio());
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m_device->setDevicePixelRatio(devicePixelRatio());
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QPainter painter(m_device);
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render(&painter);
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}
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//! [2]
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//! [3]
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void OpenGLWindow::renderLater()
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{
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requestUpdate();
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}
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bool OpenGLWindow::event(QEvent *event)
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{
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switch (event->type()) {
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case QEvent::UpdateRequest:
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renderNow();
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return true;
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default:
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return QWindow::event(event);
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}
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}
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void OpenGLWindow::exposeEvent(QExposeEvent *event)
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{
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Q_UNUSED(event);
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if (isExposed())
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renderNow();
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}
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//! [3]
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//! [4]
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void OpenGLWindow::renderNow()
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{
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if (!isExposed())
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return;
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bool needsInitialize = false;
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if (!m_context) {
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m_context = new QOpenGLContext(this);
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m_context->setFormat(requestedFormat());
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m_context->create();
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needsInitialize = true;
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}
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m_context->makeCurrent(this);
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if (needsInitialize) {
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initializeOpenGLFunctions();
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initialize();
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}
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render();
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m_context->swapBuffers(this);
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if (m_animating)
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renderLater();
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}
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//! [4]
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//! [5]
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void OpenGLWindow::setAnimating(bool animating)
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{
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m_animating = animating;
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if (animating)
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renderLater();
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}
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//! [5]
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