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Diffstat (limited to 'src/quick/scenegraph/qsgdefaultcontext.cpp')
| -rw-r--r-- | src/quick/scenegraph/qsgdefaultcontext.cpp | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/src/quick/scenegraph/qsgdefaultcontext.cpp b/src/quick/scenegraph/qsgdefaultcontext.cpp new file mode 100644 index 0000000000..f969359e7c --- /dev/null +++ b/src/quick/scenegraph/qsgdefaultcontext.cpp @@ -0,0 +1,243 @@ +/**************************************************************************** +** +** 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qsgdefaultcontext_p.h" + +#include <QtQuick/private/qsgdistancefieldutil_p.h> +#include <QtQuick/private/qsgdefaultrectanglenode_p.h> +#include <QtQuick/private/qsgdefaultimagenode_p.h> +#include <QtQuick/private/qsgdefaultpainternode_p.h> +#include <QtQuick/private/qsgdefaultglyphnode_p.h> +#include <QtQuick/private/qsgdistancefieldglyphnode_p.h> +#include <QtQuick/private/qsgdistancefieldglyphnode_p_p.h> +#include <QtQuick/private/qsgrenderloop_p.h> +#include <QtQuick/private/qsgdefaultlayer_p.h> +#include <QtQuick/private/qsgdefaultrendercontext_p.h> + +#include <QtGui/QOpenGLContext> +#include <QtGui/QOpenGLFramebufferObject> + +#include <QtQuick/QQuickWindow> + +#include <private/qqmlglobal_p.h> + +QT_BEGIN_NAMESPACE + +namespace QSGMultisampleAntialiasing { + class ImageNode : public QSGDefaultImageNode { + public: + void setAntialiasing(bool) { } + }; + + + class RectangleNode : public QSGDefaultRectangleNode { + public: + void setAntialiasing(bool) { } + }; +} + +DEFINE_BOOL_CONFIG_OPTION(qmlDisableDistanceField, QML_DISABLE_DISTANCEFIELD) + +QSGDefaultContext::QSGDefaultContext(QObject *parent) + : QSGContext (parent) + , m_antialiasingMethod(QSGContext::UndecidedAntialiasing) + , m_distanceFieldDisabled(qmlDisableDistanceField()) + , m_distanceFieldAntialiasing(QSGGlyphNode::HighQualitySubPixelAntialiasing) + , m_distanceFieldAntialiasingDecided(false) +{ + if (Q_UNLIKELY(!qEnvironmentVariableIsEmpty("QSG_DISTANCEFIELD_ANTIALIASING"))) { + const QByteArray mode = qgetenv("QSG_DISTANCEFIELD_ANTIALIASING"); + m_distanceFieldAntialiasingDecided = true; + if (mode == "subpixel") + m_distanceFieldAntialiasing = QSGGlyphNode::HighQualitySubPixelAntialiasing; + else if (mode == "subpixel-lowq") + m_distanceFieldAntialiasing = QSGGlyphNode::LowQualitySubPixelAntialiasing; + else if (mode == "gray") + m_distanceFieldAntialiasing = QSGGlyphNode::GrayAntialiasing; + } + + // Adds compatibility with Qt 5.3 and earlier's QSG_RENDER_TIMING + if (qEnvironmentVariableIsSet("QSG_RENDER_TIMING")) { + const_cast<QLoggingCategory &>(QSG_LOG_TIME_GLYPH()).setEnabled(QtDebugMsg, true); + const_cast<QLoggingCategory &>(QSG_LOG_TIME_TEXTURE()).setEnabled(QtDebugMsg, true); + const_cast<QLoggingCategory &>(QSG_LOG_TIME_RENDERER()).setEnabled(QtDebugMsg, true); + const_cast<QLoggingCategory &>(QSG_LOG_TIME_RENDERLOOP()).setEnabled(QtDebugMsg, true); + const_cast<QLoggingCategory &>(QSG_LOG_TIME_COMPILATION()).setEnabled(QtDebugMsg, true); + } +} + +QSGDefaultContext::~QSGDefaultContext() +{ + +} + +void QSGDefaultContext::renderContextInitialized(QSGRenderContext *renderContext) +{ + m_mutex.lock(); + + auto openglRenderContext = static_cast<const QSGDefaultRenderContext *>(renderContext); + if (m_antialiasingMethod == UndecidedAntialiasing) { + if (Q_UNLIKELY(qEnvironmentVariableIsSet("QSG_ANTIALIASING_METHOD"))) { + const QByteArray aaType = qgetenv("QSG_ANTIALIASING_METHOD"); + if (aaType == "msaa") + m_antialiasingMethod = MsaaAntialiasing; + else if (aaType == "vertex") + m_antialiasingMethod = VertexAntialiasing; + } + if (m_antialiasingMethod == UndecidedAntialiasing) { + if (openglRenderContext->openglContext()->format().samples() > 0) + m_antialiasingMethod = MsaaAntialiasing; + else + m_antialiasingMethod = VertexAntialiasing; + } + } + + // With OpenGL ES, except for Angle on Windows, use GrayAntialiasing, unless + // some value had been requested explicitly. This could not be decided + // before without a context. Now the context is ready. + if (!m_distanceFieldAntialiasingDecided) { + m_distanceFieldAntialiasingDecided = true; +#ifndef Q_OS_WIN32 + if (openglRenderContext->openglContext()->isOpenGLES()) + m_distanceFieldAntialiasing = QSGGlyphNode::GrayAntialiasing; +#endif + } + + static bool dumped = false; + if (!dumped && QSG_LOG_INFO().isDebugEnabled()) { + dumped = true; + QSurfaceFormat format = openglRenderContext->openglContext()->format(); + QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions(); + qCDebug(QSG_LOG_INFO) << "R/G/B/A Buffers: " << format.redBufferSize() << format.greenBufferSize() << format.blueBufferSize() << format.alphaBufferSize(); + qCDebug(QSG_LOG_INFO) << "Depth Buffer: " << format.depthBufferSize(); + qCDebug(QSG_LOG_INFO) << "Stencil Buffer: " << format.stencilBufferSize(); + qCDebug(QSG_LOG_INFO) << "Samples: " << format.samples(); + qCDebug(QSG_LOG_INFO) << "GL_VENDOR: " << (const char *) funcs->glGetString(GL_VENDOR); + qCDebug(QSG_LOG_INFO) << "GL_RENDERER: " << (const char *) funcs->glGetString(GL_RENDERER); + qCDebug(QSG_LOG_INFO) << "GL_VERSION: " << (const char *) funcs->glGetString(GL_VERSION); + QSet<QByteArray> exts = openglRenderContext->openglContext()->extensions(); + QByteArray all; foreach (const QByteArray &e, exts) all += ' ' + e; + qCDebug(QSG_LOG_INFO) << "GL_EXTENSIONS: " << all.constData(); + qCDebug(QSG_LOG_INFO) << "Max Texture Size: " << openglRenderContext->maxTextureSize(); + qCDebug(QSG_LOG_INFO) << "Debug context: " << format.testOption(QSurfaceFormat::DebugContext); + } + + m_mutex.unlock(); +} + +void QSGDefaultContext::renderContextInvalidated(QSGRenderContext *) +{ +} + +QSGRenderContext *QSGDefaultContext::createRenderContext() +{ + return new QSGDefaultRenderContext(this); +} + +QSGRectangleNode *QSGDefaultContext::createRectangleNode() +{ + return m_antialiasingMethod == MsaaAntialiasing + ? new QSGMultisampleAntialiasing::RectangleNode + : new QSGDefaultRectangleNode; +} + +QSGImageNode *QSGDefaultContext::createImageNode() +{ + return m_antialiasingMethod == MsaaAntialiasing + ? new QSGMultisampleAntialiasing::ImageNode + : new QSGDefaultImageNode; +} + +QSGPainterNode *QSGDefaultContext::createPainterNode(QQuickPaintedItem *item) +{ + return new QSGDefaultPainterNode(item); +} + +QSGGlyphNode *QSGDefaultContext::createGlyphNode(QSGRenderContext *rc, bool preferNativeGlyphNode) +{ + if (m_distanceFieldDisabled || preferNativeGlyphNode) { + return new QSGDefaultGlyphNode; + } else { + QSGDistanceFieldGlyphNode *node = new QSGDistanceFieldGlyphNode(rc); + node->setPreferredAntialiasingMode(m_distanceFieldAntialiasing); + return node; + } +} + +/*! + * Factory function for scene graph backends of the QStyle stylable elements. Returns a + * null pointer if the backend doesn't provide its own node type. + */ +QSGNinePatchNode *QSGDefaultContext::createNinePatchNode() +{ + return nullptr; +} + +QSGLayer *QSGDefaultContext::createLayer(QSGRenderContext *renderContext) +{ + return new QSGDefaultLayer(renderContext); +} + +QSurfaceFormat QSGDefaultContext::defaultSurfaceFormat() const +{ + QSurfaceFormat format = QSurfaceFormat::defaultFormat(); + static bool useDepth = qEnvironmentVariableIsEmpty("QSG_NO_DEPTH_BUFFER"); + static bool useStencil = qEnvironmentVariableIsEmpty("QSG_NO_STENCIL_BUFFER"); + static bool enableDebug = qEnvironmentVariableIsSet("QSG_OPENGL_DEBUG"); + format.setDepthBufferSize(useDepth ? 24 : 0); + format.setStencilBufferSize(useStencil ? 8 : 0); + if (enableDebug) + format.setOption(QSurfaceFormat::DebugContext); + if (QQuickWindow::hasDefaultAlphaBuffer()) + format.setAlphaBufferSize(8); + format.setSwapBehavior(QSurfaceFormat::DoubleBuffer); + return format; +} + +void QSGDefaultContext::setDistanceFieldEnabled(bool enabled) +{ + m_distanceFieldDisabled = !enabled; +} + +bool QSGDefaultContext::isDistanceFieldEnabled() const +{ + return !m_distanceFieldDisabled; +} + +QT_END_NAMESPACE |