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// Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "qt3dwindow.h"
#include "qt3dwindow_p.h"
#include <QtGui/qtguiglobal.h>
#include <Qt3DCore/qaspectengine.h>
#include <Qt3DCore/qentity.h>
#include <Qt3DCore/qcoreaspect.h>
#include <Qt3DExtras/qforwardrenderer.h>
#include <Qt3DRender/qrendersettings.h>
#include <Qt3DRender/qrenderaspect.h>
#include <Qt3DInput/qinputaspect.h>
#include <Qt3DInput/qinputsettings.h>
#include <Qt3DLogic/qlogicaspect.h>
#include <Qt3DRender/qcamera.h>
#if QT_CONFIG(vulkan)
# include <Qt3DRender/private/vulkaninstance_p.h>
#endif
#include <Qt3DRender/qt3drender-config.h>
#include <qopenglcontext.h>
#include <private/qrendersettings_p.h>
#include <QEvent>
#if QT_CONFIG(qt3d_vulkan)
#include <QVulkanInstance>
#endif
static void initResources()
{
#ifdef QT_STATIC
Q_INIT_RESOURCE(extras);
#endif
}
QT_BEGIN_NAMESPACE
namespace Qt3DExtras {
Qt3DWindowPrivate::Qt3DWindowPrivate()
: m_aspectEngine(new Qt3DCore::QAspectEngine)
, m_renderAspect(new Qt3DRender::QRenderAspect)
, m_inputAspect(new Qt3DInput::QInputAspect)
, m_logicAspect(new Qt3DLogic::QLogicAspect)
, m_renderSettings(new Qt3DRender::QRenderSettings)
, m_forwardRenderer(new Qt3DExtras::QForwardRenderer)
, m_defaultCamera(new Qt3DRender::QCamera)
, m_inputSettings(new Qt3DInput::QInputSettings)
, m_root(new Qt3DCore::QEntity)
, m_userRoot(nullptr)
, m_initialized(false)
{
}
Qt3DWindow::Qt3DWindow(QScreen *screen, Qt3DRender::API api)
: QWindow(*new Qt3DWindowPrivate(), nullptr)
{
Q_D(Qt3DWindow);
initResources();
if (!d->parentWindow)
d->connectToScreen(screen ? screen : d->topLevelScreen.data());
setupWindowSurface(this, api);
resize(1024, 768);
d->m_aspectEngine->registerAspect(new Qt3DCore::QCoreAspect);
d->m_aspectEngine->registerAspect(d->m_renderAspect);
d->m_aspectEngine->registerAspect(d->m_inputAspect);
d->m_aspectEngine->registerAspect(d->m_logicAspect);
d->m_defaultCamera->setParent(d->m_root);
d->m_forwardRenderer->setCamera(d->m_defaultCamera);
d->m_forwardRenderer->setSurface(this);
d->m_renderSettings->setActiveFrameGraph(d->m_forwardRenderer);
d->m_inputSettings->setEventSource(this);
}
Qt3DWindow::~Qt3DWindow()
{
Q_D(Qt3DWindow);
delete d->m_aspectEngine;
}
/*!
Registers the specified \a aspect.
*/
void Qt3DWindow::registerAspect(Qt3DCore::QAbstractAspect *aspect)
{
Q_ASSERT(!isVisible());
Q_D(Qt3DWindow);
d->m_aspectEngine->registerAspect(aspect);
}
/*!
Registers the specified aspect \a name.
*/
void Qt3DWindow::registerAspect(const QString &name)
{
Q_ASSERT(!isVisible());
Q_D(Qt3DWindow);
d->m_aspectEngine->registerAspect(name);
}
/*!
Sets the specified \a root entity of the scene.
*/
void Qt3DWindow::setRootEntity(Qt3DCore::QEntity *root)
{
Q_D(Qt3DWindow);
if (d->m_userRoot != root) {
if (d->m_userRoot != nullptr)
d->m_userRoot->setParent(static_cast<Qt3DCore::QNode*>(nullptr));
if (root != nullptr)
root->setParent(d->m_root);
d->m_userRoot = root;
}
}
/*!
Activates the specified \a activeFrameGraph.
*/
void Qt3DWindow::setActiveFrameGraph(Qt3DRender::QFrameGraphNode *activeFrameGraph)
{
Q_D(Qt3DWindow);
d->m_renderSettings->setActiveFrameGraph(activeFrameGraph);
}
/*!
Returns the node of the active frame graph.
*/
Qt3DRender::QFrameGraphNode *Qt3DWindow::activeFrameGraph() const
{
Q_D(const Qt3DWindow);
return d->m_renderSettings->activeFrameGraph();
}
/*!
Returns the node of the default framegraph
*/
Qt3DExtras::QForwardRenderer *Qt3DWindow::defaultFrameGraph() const
{
Q_D(const Qt3DWindow);
return d->m_forwardRenderer;
}
Qt3DRender::QCamera *Qt3DWindow::camera() const
{
Q_D(const Qt3DWindow);
return d->m_defaultCamera;
}
/*!
Returns the render settings of the 3D Window.
*/
Qt3DRender::QRenderSettings *Qt3DWindow::renderSettings() const
{
Q_D(const Qt3DWindow);
return d->m_renderSettings;
}
/*!
Manages the display events specified in \a e.
*/
void Qt3DWindow::showEvent(QShowEvent *e)
{
Q_D(Qt3DWindow);
if (!d->m_initialized) {
d->m_root->addComponent(d->m_renderSettings);
d->m_root->addComponent(d->m_inputSettings);
d->m_aspectEngine->setRootEntity(Qt3DCore::QEntityPtr(d->m_root));
d->m_initialized = true;
}
QWindow::showEvent(e);
}
/*!
Resets the aspect ratio of the 3D window.
*/
void Qt3DWindow::resizeEvent(QResizeEvent *)
{
Q_D(Qt3DWindow);
d->m_defaultCamera->setAspectRatio(float(width()) / std::max(1.f, static_cast<float>(height())));
}
/*!
\reimp
Requests renderer to redraw if we are using OnDemand render policy.
*/
bool Qt3DWindow::event(QEvent *e)
{
Q_D(Qt3DWindow);
const bool needsRedraw = (e->type() == QEvent::Expose || e->type() == QEvent::UpdateRequest);
if (needsRedraw && d->m_renderSettings->renderPolicy() == Qt3DRender::QRenderSettings::OnDemand) {
Qt3DRender::QRenderSettingsPrivate *p = static_cast<Qt3DRender::QRenderSettingsPrivate *>(
Qt3DCore::QNodePrivate::get(d->m_renderSettings));
p->invalidateFrame();
}
return QWindow::event(e);
}
void setupWindowSurface(QWindow *window, Qt3DRender::API api) noexcept
{
// If the user pass an API through the environment, we use that over the one passed as argument.
const auto userRequestedApi = qgetenv("QSG_RHI_BACKEND").toLower();
if (!userRequestedApi.isEmpty()) {
if (userRequestedApi == QByteArrayLiteral("opengl") ||
userRequestedApi == QByteArrayLiteral("gl") ||
userRequestedApi == QByteArrayLiteral("gles2")) {
api = Qt3DRender::API::OpenGL;
} else if (userRequestedApi == QByteArrayLiteral("vulkan")) {
api = Qt3DRender::API::Vulkan;
} else if (userRequestedApi == QByteArrayLiteral("metal")) {
api = Qt3DRender::API::Metal;
} else if (userRequestedApi == QByteArrayLiteral("d3d11")) {
api = Qt3DRender::API::DirectX;
} else if (userRequestedApi == QByteArrayLiteral("null")) {
api = Qt3DRender::API::Null;
} else if (userRequestedApi == QByteArrayLiteral("auto")) {
api = Qt3DRender::API::RHI;
}
}
// Default to using RHI backend is not specified We want to set the
// variable to ensure any 3rd party relying on it to detect which rendering
// backend is in use will get a valid value.
bool useRhi = false;
if (qEnvironmentVariableIsEmpty("QT3D_RENDERER")) {
#if QT_CONFIG(qt3d_rhi_renderer)
qputenv("QT3D_RENDERER", "rhi");
#else
qputenv("QT3D_RENDERER", "opengl");
#endif
}
#if QT_CONFIG(qt3d_rhi_renderer)
useRhi = qEnvironmentVariable("QT3D_RENDERER") == QStringLiteral("rhi");
#endif
if (!useRhi)
api = Qt3DRender::API::OpenGL;
// We have to set the environment so that the backend is able to read it.
if (api == Qt3DRender::API::RHI && useRhi) {
#if defined(Q_OS_WIN)
api = Qt3DRender::API::DirectX;
#elif defined(Q_OS_MACOS) || defined(Q_OS_IOS)
api = Qt3DRender::API::Metal;
#elif QT_CONFIG(opengl)
api = Qt3DRender::API::OpenGL;
#else
api = Qt3DRender::API::Vulkan;
#endif
}
switch (api) {
case Qt3DRender::API::OpenGL:
qputenv("QSG_RHI_BACKEND", "opengl");
window->setSurfaceType(QSurface::OpenGLSurface);
break;
case Qt3DRender::API::DirectX:
qputenv("QSG_RHI_BACKEND", "d3d11");
window->setSurfaceType(QSurface::Direct3DSurface);
break;
case Qt3DRender::API::Null:
qputenv("QSG_RHI_BACKEND", "null");
window->setSurfaceType(QSurface::OpenGLSurface);
break;
case Qt3DRender::API::Metal:
qputenv("QSG_RHI_BACKEND", "metal");
window->setSurfaceType(QSurface::MetalSurface);
break;
#if QT_CONFIG(qt3d_vulkan)
case Qt3DRender::API::Vulkan:
{
qputenv("QSG_RHI_BACKEND", "vulkan");
window->setSurfaceType(QSurface::VulkanSurface);
window->setVulkanInstance(&Qt3DRender::staticVulkanInstance());
break;
}
#endif
case Qt3DRender::API::RHI:
default:
break;
}
QSurfaceFormat format = QSurfaceFormat::defaultFormat();
const QByteArray renderingBackend = qgetenv("QT3D_RENDERER");
const bool usesRHI = renderingBackend.isEmpty() || renderingBackend == QByteArrayLiteral("rhi");
if (!usesRHI) {
#if QT_CONFIG(opengles2)
format.setRenderableType(QSurfaceFormat::OpenGLES);
#else
if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL) {
format.setVersion(4, 3);
format.setProfile(QSurfaceFormat::CoreProfile);
}
#endif
}
format.setDepthBufferSize(24);
if (!QSurfaceFormat::defaultFormat().stereo())
format.setSamples(4);
format.setStencilBufferSize(8);
window->setFormat(format);
QSurfaceFormat::setDefaultFormat(format);
}
} // Qt3DExtras
QT_END_NAMESPACE
#include "moc_qt3dwindow.cpp"
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