diff options
Diffstat (limited to 'src/quick/scenegraph/qsgcontextplugin.cpp')
| -rw-r--r-- | src/quick/scenegraph/qsgcontextplugin.cpp | 88 |
1 files changed, 32 insertions, 56 deletions
diff --git a/src/quick/scenegraph/qsgcontextplugin.cpp b/src/quick/scenegraph/qsgcontextplugin.cpp index 66add51c55..9dbf263765 100644 --- a/src/quick/scenegraph/qsgcontextplugin.cpp +++ b/src/quick/scenegraph/qsgcontextplugin.cpp @@ -1,41 +1,5 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtQuick module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** 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. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #include "qsgcontextplugin_p.h" #include <QtQuick/private/qsgcontext_p.h> @@ -45,17 +9,13 @@ // Built-in adaptations #include <QtQuick/private/qsgsoftwareadaptation_p.h> -#if QT_CONFIG(opengl) #include <QtQuick/private/qsgdefaultcontext_p.h> -#endif #include <QtGui/private/qguiapplication_p.h> #include <QtGui/qpa/qplatformintegration.h> QT_BEGIN_NAMESPACE -Q_DECLARE_LOGGING_CATEGORY(QSG_LOG_INFO) - QSGContextPlugin::QSGContextPlugin(QObject *parent) : QObject(parent) { @@ -87,7 +47,6 @@ struct QSGAdaptationBackendData }; QSGAdaptationBackendData::QSGAdaptationBackendData() - : flags(nullptr) { // Fill in the table with the built-in adaptations. builtIns.append(new QSGSoftwareAdaptation); @@ -118,9 +77,9 @@ QSGAdaptationBackendData *contextFactory() backendData->tried = true; const QStringList args = QGuiApplication::arguments(); - QString requestedBackend = backendData->quickWindowBackendRequest; // empty or set via QQuickWindow::setBackend() + QString requestedBackend = backendData->quickWindowBackendRequest; // empty or set via QQuickWindow::setSceneGraphBackend() - for (int index = 0; index < args.count(); ++index) { + for (int index = 0; index < args.size(); ++index) { if (args.at(index).startsWith(QLatin1String("--device="))) { requestedBackend = args.at(index).mid(9); break; @@ -136,18 +95,39 @@ QSGAdaptationBackendData *contextFactory() if (requestedBackend.isEmpty()) requestedBackend = qEnvironmentVariable("QT_QUICK_BACKEND"); - // If this platform does not support OpenGL, and no backend has been set - // default to the software renderer - if (requestedBackend.isEmpty() - && !QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::OpenGL)) { - requestedBackend = QString::fromLocal8Bit("software"); + // If this platform does not support OpenGL, Vulkan, D3D11, or Metal, and no + // backend has been set, default to the software renderer. We rely on the + // static, build time flags only. This is to prevent the inevitable confusion + // caused by run time hocus pocus. If one wants to use the software backend + // in a GL or Vulkan capable Qt build (or on Windows or Apple platforms), it + // has to be requested explicitly. +#if !QT_CONFIG(opengl) && !QT_CONFIG(vulkan) && !QT_CONFIG(metal) && !defined(Q_OS_WIN) + if (requestedBackend.isEmpty()) + requestedBackend = QLatin1String("software"); +#endif + + // As an exception to the above, play nice with platform plugins like + // vnc or linuxfb: Trying to initialize a QRhi is futile on these, and + // Qt 5 had an explicit fallback to the software backend, based on the + // OpenGL capability. Replicate that behavior using the new + // RhiBasedRendering capability flag, which, on certain platforms, + // indicates that we should not even bother trying to initialize a QRhi + // as no 3D API can be expected work. + if (!QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::RhiBasedRendering)) { + if (requestedBackend.isEmpty()) + requestedBackend = QLatin1String("software"); } + // This is handy if some of the logic above goes wrong and we select + // e.g. the software backend when it is not desired. + if (requestedBackend == QLatin1String("rhi")) + requestedBackend.clear(); // empty = no custom backend to load + if (!requestedBackend.isEmpty()) { qCDebug(QSG_LOG_INFO, "Loading backend %s", qUtf8Printable(requestedBackend)); // First look for a built-in adaptation. - for (QSGContextFactoryInterface *builtInBackend : qAsConst(backendData->builtIns)) { + for (QSGContextFactoryInterface *builtInBackend : std::as_const(backendData->builtIns)) { if (builtInBackend->keys().contains(requestedBackend)) { backendData->factory = builtInBackend; backendData->name = requestedBackend; @@ -170,7 +150,7 @@ QSGAdaptationBackendData *contextFactory() qWarning("Could not create scene graph context for backend '%s'" " - check that plugins are installed correctly in %s", qPrintable(requestedBackend), - qPrintable(QLibraryInfo::location(QLibraryInfo::PluginsPath))); + qPrintable(QLibraryInfo::path(QLibraryInfo::PluginsPath))); } } #endif // library @@ -193,11 +173,7 @@ QSGContext *QSGContext::createDefaultContext() QSGAdaptationBackendData *backendData = contextFactory(); if (backendData->factory) return backendData->factory->create(backendData->name); -#if QT_CONFIG(opengl) return new QSGDefaultContext(); -#else - return nullptr; -#endif } |