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/****************************************************************************
**
** 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
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