qt-everywhere-src-5.15.1/qtdeclarative/src/quick/items/qquickgraphicsinfo.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** 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 "qquickgraphicsinfo_p.h"
 #include "qquickwindow.h"
 #include "qquickitem.h"
 #include <QtGui/qopenglcontext.h>

 QT_BEGIN_NAMESPACE

 /*!
     \qmltype GraphicsInfo
     \instantiates QQuickGraphicsInfo
     \inqmlmodule QtQuick
     \ingroup qtquick-visual
     \since 5.8
     \since QtQuick 2.8
     \brief Provides information about the used Qt Quick backend.

     The GraphicsInfo attached type provides information about the scenegraph
     backend used to render the contents of the associated window.

     If the item to which the properties are attached is not currently
     associated with any window, the properties are set to default values. When
     the associated window changes, the properties will update.
  */

 QQuickGraphicsInfo::QQuickGraphicsInfo(QQuickItem *item)
     : QObject(item)
     , m_window(nullptr)
     , m_api(Unknown)
     , m_shaderType(UnknownShadingLanguage)
     , m_shaderCompilationType(ShaderCompilationType(0))
     , m_shaderSourceType(ShaderSourceType(0))
     , m_majorVersion(2)
     , m_minorVersion(0)
     , m_profile(OpenGLNoProfile)
     , m_renderableType(SurfaceFormatUnspecified)
 {
     connect(item, SIGNAL(windowChanged(QQuickWindow*)), this, SLOT(setWindow(QQuickWindow*)));
     setWindow(item->window());
 }

 QQuickGraphicsInfo *QQuickGraphicsInfo::qmlAttachedProperties(QObject *object)
 {
     if (QQuickItem *item = qobject_cast<QQuickItem *>(object))
         return new QQuickGraphicsInfo(item);

     return nullptr;
 }

 /*!
     \qmlproperty enumeration QtQuick::GraphicsInfo::api

     This property describes the graphics API that is currently in use.

     The possible values are:
     \list
     \li GraphicsInfo.Unknown - the default value when no active scenegraph is associated with the item
     \li GraphicsInfo.Software - Qt Quick's software renderer based on QPainter with the raster paint engine
     \li GraphicsInfo.OpenGL - OpenGL or OpenGL ES
     \li GraphicsInfo.Direct3D12 - Direct3D 12
     \li GraphicsInfo.OpenVG - OpenVG
     \li GraphicsInfo.OpenGLRhi - OpenGL on top of QRhi, a graphics abstraction layer
     \li GraphicsInfo.Direct3D11Rhi - Direct3D 11 on top of QRhi, a graphics abstraction layer
     \li GraphicsInfo.VulkanRhi - Vulkan on top of QRhi, a graphics abstraction layer
     \li GraphicsInfo.MetalRhi - Metal on top of QRhi, a graphics abstraction layer
     \li GraphicsInfo.NullRhi - Null (no output) on top of QRhi, a graphics abstraction layer
     \endlist
  */

 /*!
     \qmlproperty enumeration QtQuick::GraphicsInfo::shaderType

     This property contains the shading language supported by the Qt Quick
     backend the application is using.

     \list
     \li GraphicsInfo.UnknownShadingLanguage - Not yet known due to no window and scenegraph associated
     \li GraphicsInfo.GLSL - GLSL or GLSL ES
     \li GraphicsInfo.HLSL - HLSL
     \li GraphicsInfo.RhiShader - QShader
     \endlist

     \note The value is only up-to-date once the item is associated with a
     window. Bindings relying on the value have to keep this in mind since the
     value may change from GraphicsInfo.UnknownShadingLanguage to the actual
     value after component initialization is complete. This is particularly
     relevant for ShaderEffect items inside ShaderEffectSource items set as
     property values.

     \since 5.8
     \since QtQuick 2.8

     \sa shaderCompilationType, shaderSourceType
 */

 /*!
     \qmlproperty enumeration QtQuick::GraphicsInfo::shaderCompilationType

     This property contains a bitmask of the shader compilation approaches
     supported by the Qt Quick backend the application is using.

     \list
     \li GraphicsInfo.RuntimeCompilation
     \li GraphicsInfo.OfflineCompilation
     \endlist

     With OpenGL the value is GraphicsInfo.RuntimeCompilation, which corresponds
     to the traditional way of using ShaderEffect. Non-OpenGL backends are
     expected to focus more on GraphicsInfo.OfflineCompilation, however.

     \note The value is only up-to-date once the item is associated with a
     window. Bindings relying on the value have to keep this in mind since the
     value may change from \c 0 to the actual bitmask after component
     initialization is complete. This is particularly relevant for ShaderEffect
     items inside ShaderEffectSource items set as property values.

     \since 5.8
     \since QtQuick 2.8

     \sa shaderType, shaderSourceType
 */

 /*!
     \qmlproperty enumeration QtQuick::GraphicsInfo::shaderSourceType

     This property contains a bitmask of the supported ways of providing shader
     sources.

     \list
     \li GraphicsInfo.ShaderSourceString
     \li GraphicsInfo.ShaderSourceFile
     \li GraphicsInfo.ShaderByteCode
     \endlist

     With OpenGL the value is GraphicsInfo.ShaderSourceString, which corresponds
     to the traditional way of inlining GLSL source code into QML. Other,
     non-OpenGL Qt Quick backends may however decide not to support inlined
     shader sources, or even shader sources at all. In this case shaders are
     expected to be pre-compiled into formats like SPIR-V or D3D shader
     bytecode.

     \note The value is only up-to-date once the item is associated with a
     window. Bindings relying on the value have to keep this in mind since the
     value may change from \c 0 to the actual bitmask after component
     initialization is complete. This is particularly relevant for ShaderEffect
     items inside ShaderEffectSource items set as property values.

     \since 5.8
     \since QtQuick 2.8

     \sa shaderType, shaderCompilationType
 */

 /*!
     \qmlproperty int QtQuick::GraphicsInfo::majorVersion

     This property holds the major version of the graphics API in use.

     With OpenGL the default version is \c 2.0.

     \sa minorVersion, profile
  */

 /*!
     \qmlproperty int QtQuick::GraphicsInfo::minorVersion

     This property holds the minor version of the graphics API in use.

     With OpenGL the default version is \c 2.0.

     \sa majorVersion, profile
  */

 /*!
     \qmlproperty enumeration QtQuick::GraphicsInfo::profile

     This property holds the configured OpenGL context profile.

     The possible values are:
     \list
     \li GraphicsInfo.OpenGLNoProfile (default) - OpenGL version is lower than 3.2 or OpenGL is not in use.
     \li GraphicsInfo.OpenGLCoreProfile - Functionality deprecated in OpenGL version 3.0 is not available.
     \li GraphicsInfo.OpenGLCompatibilityProfile - Functionality from earlier OpenGL versions is available.
     \endlist

     Reusable QML components will typically use this property in bindings in order to
     choose between core and non core profile compatible shader sources.

     \sa majorVersion, minorVersion, QSurfaceFormat
  */

 /*!
     \qmlproperty enumeration QtQuick::GraphicsInfo::renderableType

     This property holds the renderable type. The value has no meaning for APIs
     other than OpenGL.

     The possible values are:
     \list
     \li GraphicsInfo.SurfaceFormatUnspecified (default) - Unspecified rendering method
     \li GraphicsInfo.SurfaceFormatOpenGL - Desktop OpenGL or other graphics API
     \li GraphicsInfo.SurfaceFormatOpenGLES - OpenGL ES
     \endlist

     \sa QSurfaceFormat
  */

 void QQuickGraphicsInfo::updateInfo()
 {
     // The queries via the RIF do not depend on isSceneGraphInitialized(), they only need a window.
     if (m_window) {
         QSGRendererInterface *rif = m_window->rendererInterface();
         if (rif) {
             GraphicsApi newAPI = GraphicsApi(rif->graphicsApi());
             if (m_api != newAPI) {
                 m_api = newAPI;
                 emit apiChanged();
                 m_shaderType = ShaderType(rif->shaderType());
                 emit shaderTypeChanged();
                 m_shaderCompilationType = ShaderCompilationType(int(rif->shaderCompilationType()));
                 emit shaderCompilationTypeChanged();
                 m_shaderSourceType = ShaderSourceType(int(rif->shaderSourceType()));
                 emit shaderSourceTypeChanged();
             }
         }
     }

     QSurfaceFormat format = QSurfaceFormat::defaultFormat();
 #if QT_CONFIG(opengl)
     if (m_window && m_window->isSceneGraphInitialized()) {
         QOpenGLContext *context = m_window->openglContext();
         if (context)
             format = context->format();
     }
 #endif
     if (m_majorVersion != format.majorVersion()) {
         m_majorVersion = format.majorVersion();
         emit majorVersionChanged();
     }
     if (m_minorVersion != format.minorVersion()) {
         m_minorVersion = format.minorVersion();
         emit minorVersionChanged();
     }
     OpenGLContextProfile profile = static_cast<OpenGLContextProfile>(format.profile());
     if (m_profile != profile) {
         m_profile = profile;
         emit profileChanged();
     }
     RenderableType renderableType = static_cast<RenderableType>(format.renderableType());
     if (m_renderableType != renderableType) {
         m_renderableType = renderableType;
         emit renderableTypeChanged();
     }
 }

 void QQuickGraphicsInfo::setWindow(QQuickWindow *window)
 {
     if (m_window != window) {
         if (m_window) {
             disconnect(m_window, SIGNAL(sceneGraphInitialized()), this, SLOT(updateInfo()));
             disconnect(m_window, SIGNAL(sceneGraphInvalidated()), this, SLOT(updateInfo()));
         }
         if (window) {
             connect(window, SIGNAL(sceneGraphInitialized()), this, SLOT(updateInfo()));
             connect(window, SIGNAL(sceneGraphInvalidated()), this, SLOT(updateInfo()));
         }
         m_window = window;
     }
     updateInfo();
 }

 QT_END_NAMESPACE

 #include "moc_qquickgraphicsinfo_p.cpp"
	/****************************************************************************
	**
	** 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 "qquickgraphicsinfo_p.h"
	#include "qquickwindow.h"
	#include "qquickitem.h"
	#include <QtGui/qopenglcontext.h>

	QT_BEGIN_NAMESPACE

	/*!
	\qmltype GraphicsInfo
	\instantiates QQuickGraphicsInfo
	\inqmlmodule QtQuick
	\ingroup qtquick-visual
	\since 5.8
	\since QtQuick 2.8
	\brief Provides information about the used Qt Quick backend.

	The GraphicsInfo attached type provides information about the scenegraph
	backend used to render the contents of the associated window.

	If the item to which the properties are attached is not currently
	associated with any window, the properties are set to default values. When
	the associated window changes, the properties will update.
	*/

	QQuickGraphicsInfo::QQuickGraphicsInfo(QQuickItem *item)
	: QObject(item)
	, m_window(nullptr)
	, m_api(Unknown)
	, m_shaderType(UnknownShadingLanguage)
	, m_shaderCompilationType(ShaderCompilationType(0))
	, m_shaderSourceType(ShaderSourceType(0))
	, m_majorVersion(2)
	, m_minorVersion(0)
	, m_profile(OpenGLNoProfile)
	, m_renderableType(SurfaceFormatUnspecified)
	{
	connect(item, SIGNAL(windowChanged(QQuickWindow)), this, SLOT(setWindow(QQuickWindow)));
	setWindow(item->window());
	}

	QQuickGraphicsInfo QQuickGraphicsInfo::qmlAttachedProperties(QObject object)
	{
	if (QQuickItem item = qobject_cast<QQuickItem >(object))
	return new QQuickGraphicsInfo(item);

	return nullptr;
	}

	/*!
	\qmlproperty enumeration QtQuick::GraphicsInfo::api

	This property describes the graphics API that is currently in use.

	The possible values are:
	\list
	\li GraphicsInfo.Unknown - the default value when no active scenegraph is associated with the item
	\li GraphicsInfo.Software - Qt Quick's software renderer based on QPainter with the raster paint engine
	\li GraphicsInfo.OpenGL - OpenGL or OpenGL ES
	\li GraphicsInfo.Direct3D12 - Direct3D 12
	\li GraphicsInfo.OpenVG - OpenVG
	\li GraphicsInfo.OpenGLRhi - OpenGL on top of QRhi, a graphics abstraction layer
	\li GraphicsInfo.Direct3D11Rhi - Direct3D 11 on top of QRhi, a graphics abstraction layer
	\li GraphicsInfo.VulkanRhi - Vulkan on top of QRhi, a graphics abstraction layer
	\li GraphicsInfo.MetalRhi - Metal on top of QRhi, a graphics abstraction layer
	\li GraphicsInfo.NullRhi - Null (no output) on top of QRhi, a graphics abstraction layer
	\endlist
	*/

	/*!
	\qmlproperty enumeration QtQuick::GraphicsInfo::shaderType

	This property contains the shading language supported by the Qt Quick
	backend the application is using.

	\list
	\li GraphicsInfo.UnknownShadingLanguage - Not yet known due to no window and scenegraph associated
	\li GraphicsInfo.GLSL - GLSL or GLSL ES
	\li GraphicsInfo.HLSL - HLSL
	\li GraphicsInfo.RhiShader - QShader
	\endlist

	\note The value is only up-to-date once the item is associated with a
	window. Bindings relying on the value have to keep this in mind since the
	value may change from GraphicsInfo.UnknownShadingLanguage to the actual
	value after component initialization is complete. This is particularly
	relevant for ShaderEffect items inside ShaderEffectSource items set as
	property values.

	\since 5.8
	\since QtQuick 2.8

	\sa shaderCompilationType, shaderSourceType
	*/

	/*!
	\qmlproperty enumeration QtQuick::GraphicsInfo::shaderCompilationType

	This property contains a bitmask of the shader compilation approaches
	supported by the Qt Quick backend the application is using.

	\list
	\li GraphicsInfo.RuntimeCompilation
	\li GraphicsInfo.OfflineCompilation
	\endlist

	With OpenGL the value is GraphicsInfo.RuntimeCompilation, which corresponds
	to the traditional way of using ShaderEffect. Non-OpenGL backends are
	expected to focus more on GraphicsInfo.OfflineCompilation, however.

	\note The value is only up-to-date once the item is associated with a
	window. Bindings relying on the value have to keep this in mind since the
	value may change from \c 0 to the actual bitmask after component
	initialization is complete. This is particularly relevant for ShaderEffect
	items inside ShaderEffectSource items set as property values.

	\since 5.8
	\since QtQuick 2.8

	\sa shaderType, shaderSourceType
	*/

	/*!
	\qmlproperty enumeration QtQuick::GraphicsInfo::shaderSourceType

	This property contains a bitmask of the supported ways of providing shader
	sources.

	\list
	\li GraphicsInfo.ShaderSourceString
	\li GraphicsInfo.ShaderSourceFile
	\li GraphicsInfo.ShaderByteCode
	\endlist

	With OpenGL the value is GraphicsInfo.ShaderSourceString, which corresponds
	to the traditional way of inlining GLSL source code into QML. Other,
	non-OpenGL Qt Quick backends may however decide not to support inlined
	shader sources, or even shader sources at all. In this case shaders are
	expected to be pre-compiled into formats like SPIR-V or D3D shader
	bytecode.

	\note The value is only up-to-date once the item is associated with a
	window. Bindings relying on the value have to keep this in mind since the
	value may change from \c 0 to the actual bitmask after component
	initialization is complete. This is particularly relevant for ShaderEffect
	items inside ShaderEffectSource items set as property values.

	\since 5.8
	\since QtQuick 2.8

	\sa shaderType, shaderCompilationType
	*/

	/*!
	\qmlproperty int QtQuick::GraphicsInfo::majorVersion

	This property holds the major version of the graphics API in use.

	With OpenGL the default version is \c 2.0.

	\sa minorVersion, profile
	*/

	/*!
	\qmlproperty int QtQuick::GraphicsInfo::minorVersion

	This property holds the minor version of the graphics API in use.

	With OpenGL the default version is \c 2.0.

	\sa majorVersion, profile
	*/

	/*!
	\qmlproperty enumeration QtQuick::GraphicsInfo::profile

	This property holds the configured OpenGL context profile.

	The possible values are:
	\list
	\li GraphicsInfo.OpenGLNoProfile (default) - OpenGL version is lower than 3.2 or OpenGL is not in use.
	\li GraphicsInfo.OpenGLCoreProfile - Functionality deprecated in OpenGL version 3.0 is not available.
	\li GraphicsInfo.OpenGLCompatibilityProfile - Functionality from earlier OpenGL versions is available.
	\endlist

	Reusable QML components will typically use this property in bindings in order to
	choose between core and non core profile compatible shader sources.

	\sa majorVersion, minorVersion, QSurfaceFormat
	*/

	/*!
	\qmlproperty enumeration QtQuick::GraphicsInfo::renderableType

	This property holds the renderable type. The value has no meaning for APIs
	other than OpenGL.

	The possible values are:
	\list
	\li GraphicsInfo.SurfaceFormatUnspecified (default) - Unspecified rendering method
	\li GraphicsInfo.SurfaceFormatOpenGL - Desktop OpenGL or other graphics API
	\li GraphicsInfo.SurfaceFormatOpenGLES - OpenGL ES
	\endlist

	\sa QSurfaceFormat
	*/

	void QQuickGraphicsInfo::updateInfo()
	{
	// The queries via the RIF do not depend on isSceneGraphInitialized(), they only need a window.
	if (m_window) {
	QSGRendererInterface *rif = m_window->rendererInterface();
	if (rif) {
	GraphicsApi newAPI = GraphicsApi(rif->graphicsApi());
	if (m_api != newAPI) {
	m_api = newAPI;
	emit apiChanged();
	m_shaderType = ShaderType(rif->shaderType());
	emit shaderTypeChanged();
	m_shaderCompilationType = ShaderCompilationType(int(rif->shaderCompilationType()));
	emit shaderCompilationTypeChanged();
	m_shaderSourceType = ShaderSourceType(int(rif->shaderSourceType()));
	emit shaderSourceTypeChanged();
	}
	}
	}

	QSurfaceFormat format = QSurfaceFormat::defaultFormat();
	#if QT_CONFIG(opengl)
	if (m_window && m_window->isSceneGraphInitialized()) {
	QOpenGLContext *context = m_window->openglContext();
	if (context)
	format = context->format();
	}
	#endif
	if (m_majorVersion != format.majorVersion()) {
	m_majorVersion = format.majorVersion();
	emit majorVersionChanged();
	}
	if (m_minorVersion != format.minorVersion()) {
	m_minorVersion = format.minorVersion();
	emit minorVersionChanged();
	}
	OpenGLContextProfile profile = static_cast<OpenGLContextProfile>(format.profile());
	if (m_profile != profile) {
	m_profile = profile;
	emit profileChanged();
	}
	RenderableType renderableType = static_cast<RenderableType>(format.renderableType());
	if (m_renderableType != renderableType) {
	m_renderableType = renderableType;
	emit renderableTypeChanged();
	}
	}

	void QQuickGraphicsInfo::setWindow(QQuickWindow *window)
	{
	if (m_window != window) {
	if (m_window) {
	disconnect(m_window, SIGNAL(sceneGraphInitialized()), this, SLOT(updateInfo()));
	disconnect(m_window, SIGNAL(sceneGraphInvalidated()), this, SLOT(updateInfo()));
	}
	if (window) {
	connect(window, SIGNAL(sceneGraphInitialized()), this, SLOT(updateInfo()));
	connect(window, SIGNAL(sceneGraphInvalidated()), this, SLOT(updateInfo()));
	}
	m_window = window;
	}
	updateInfo();
	}

	QT_END_NAMESPACE

	#include "moc_qquickgraphicsinfo_p.cpp"