qt-everywhere-src-5.14.1/qtwayland/src/compositor/extensions/qwaylandwlscaler.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the QtWaylandCompositor module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL3$
 ** 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 http://www.qt.io/terms-conditions. For further
 ** information use the contact form at http://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.LGPLv3 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.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 later as published by the Free
 ** Software Foundation and appearing in the file LICENSE.GPL included in
 ** the packaging of this file. Please review the following information to
 ** ensure the GNU General Public License version 2.0 requirements will be
 ** met: http://www.gnu.org/licenses/gpl-2.0.html.
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "qwaylandwlscaler_p.h"

 #include <QtWaylandCompositor/QWaylandSurface>
 #include <QtWaylandCompositor/QWaylandCompositor>

 #include <QtWaylandCompositor/private/qwaylandsurface_p.h>

 QT_BEGIN_NAMESPACE

 #if QT_DEPRECATED_SINCE(5, 13)
 /*!
     \qmltype WlScaler
     \inqmlmodule QtWayland.Compositor
     \since 5.13
     \brief Provides an extension for surface resizing and cropping.

     The WlScaler extension provides a way for clients to resize and crop surface contents.

     WlScaler corresponds to the Wayland interface, \c wl_scaler.

     \c wl_scaler is a non-standard and deprecated protocol that has largely been replaced by
     \c wp_viewporter. I.e. This extensions is only useful for supporting legacy clients.
     \c wp_viewporter support is enabled automatically for all Qml compositors.

     To provide the functionality of the extension in a compositor, create an instance of the
     WlScaler component and add it to the list of extensions supported by the compositor:

     \qml \QtMinorVersion
     import QtWayland.Compositor 1.\1

     WaylandCompositor {
         // ...
         WlScaler {}
     }
     \endqml

     \deprecated
 */

 /*!
     \class QWaylandWlScaler
     \inmodule QtWaylandCompositor
     \since 5.13
     \brief Provides an extension for surface resizing and croping.

     The QWaylandWlScaler extension provides a way for clients to resize and crop surface
     contents.

     QWaylandWlScaler corresponds to the Wayland interface, \c wl_scaler.

     \c wl_scaler is a non-standard and deprecated protocol that has largely been replaced by
     \c wp_viewporter. I.e. This extensions is only useful for supporting legacy clients.

     \sa QWaylandViewporter

     \deprecated
 */

 /*!
     Constructs a QWaylandWlScaler object.
 */
 QWaylandWlScaler::QWaylandWlScaler()
     : QWaylandCompositorExtensionTemplate<QWaylandWlScaler>(*new QWaylandWlScalerPrivate)
 {
 }

 /*!
  * Constructs a QWaylandWlScaler object for the provided \a compositor.
  */
 QWaylandWlScaler::QWaylandWlScaler(QWaylandCompositor *compositor)
     : QWaylandCompositorExtensionTemplate<QWaylandWlScaler>(compositor, *new QWaylandWlScalerPrivate())
 {
 }

 /*!
     Initializes the extension.
 */
 void QWaylandWlScaler::initialize()
 {
     Q_D(QWaylandWlScaler);

     QWaylandCompositorExtensionTemplate::initialize();
     auto *compositor = static_cast<QWaylandCompositor *>(extensionContainer());
     if (!compositor) {
         qWarning() << "Failed to find QWaylandCompositor when initializing QWaylandWlScaler";
         return;
     }
     d->init(compositor->display(), 2);
 }

 /*!
     Returns the Wayland interface for the QWaylandWlScaler.
 */
 const wl_interface *QWaylandWlScaler::interface()
 {
     return QWaylandWlScalerPrivate::interface();
 }

 void QWaylandWlScalerPrivate::scaler_destroy(Resource *resource)
 {
     // Viewport objects are allowed ot outlive the scaler
     wl_resource_destroy(resource->handle);
 }

 void QWaylandWlScalerPrivate::scaler_get_viewport(Resource *resource, uint id, wl_resource *surfaceResource)
 {
     auto *surface = QWaylandSurface::fromResource(surfaceResource);
     if (!surface) {
         qWarning() << "Couldn't find surface for viewporter";
         return;
     }

     // Note: This will only protect us not creating scalers for surfaces with wp_viewport objects
     auto *surfacePrivate = QWaylandSurfacePrivate::get(surface);
     if (surfacePrivate->viewport) {
         wl_resource_post_error(resource->handle, WL_SCALER_ERROR_VIEWPORT_EXISTS,
                                "viewport already exists for surface");
         return;
     }

     // We can't set viewport here, since it's of the new type for wp_viewporter
 //    surfacePrivate->viewport = new Viewport(surface, resource->client(), id, resource->version());
     new Viewport(surface, resource->client(), id, resource->version());
 }

 QWaylandWlScalerPrivate::Viewport::Viewport(QWaylandSurface *surface, wl_client *client, int id, int version)
     : QtWaylandServer::wl_viewport(client, id, version)
     , m_surface(surface)
 {
     Q_ASSERT(surface);
 }

 //TODO: This isn't currently called
 // This function has to be called immediately after a surface is committed, before no
 // other client events have been dispatched, or we may incorrectly error out on an
 // incomplete pending state. See comment below.
 void QWaylandWlScalerPrivate::Viewport::checkCommittedState()
 {
     auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);

     // We can't use the current state for destination/source when checking,
     // as that has fallbacks to the buffer size so we can't distinguish
     // between the set/unset case. We use the pending state because no other
     // requests has modified it yet.
     QSize destination = surfacePrivate->pending.destinationSize;
     QRectF source = surfacePrivate->pending.sourceGeometry;

     if (!destination.isValid() && source.size() != source.size().toSize()) {
         //TODO: Do rounding to nearest integer
     }

     QRectF max = QRectF(QPointF(), m_surface->bufferSize() / m_surface->bufferScale());
     // We can't use QRectF.contains, because that would return false for values on the border
     if (max.united(source) != max) {
         //TODO: surface contents are no undefined, surface size is still valid though
         qCDebug(qLcWaylandCompositor) << "Source set outside buffer bounds (client error)";
     }
 }


 void QWaylandWlScalerPrivate::Viewport::viewport_destroy_resource(Resource *resource)
 {
     Q_UNUSED(resource);
     delete this;
 }

 void QWaylandWlScalerPrivate::Viewport::viewport_destroy(Resource *resource)
 {
     if (m_surface) {
         auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
         surfacePrivate->pending.destinationSize = QSize();
         surfacePrivate->pending.sourceGeometry = QRectF();
     }
     wl_resource_destroy(resource->handle);
 }

 void QWaylandWlScalerPrivate::Viewport::viewport_set(QtWaylandServer::wl_viewport::Resource *resource, wl_fixed_t src_x, wl_fixed_t src_y, wl_fixed_t src_width, wl_fixed_t src_height, int32_t dst_width, int32_t dst_height)
 {
     viewport_set_source(resource, src_x, src_y, src_width, src_height);
     viewport_set_destination(resource, dst_width, dst_height);
 }

 void QWaylandWlScalerPrivate::Viewport::viewport_set_source(QtWaylandServer::wl_viewport::Resource *resource, wl_fixed_t x, wl_fixed_t y, wl_fixed_t width, wl_fixed_t height)
 {
     Q_UNUSED(resource);

     if (!m_surface) {
         qCDebug(qLcWaylandCompositor) << "set_source requested for destroyed surface";
         return;
     }

     QPointF position(wl_fixed_to_double(x), wl_fixed_to_double(y));
     QSizeF size(wl_fixed_to_double(width), wl_fixed_to_double(height));
     QRectF sourceGeometry(position, size);

     if (sourceGeometry == QRectF(-1, -1, -1, -1)) {
         auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
         surfacePrivate->pending.sourceGeometry = QRectF();
         return;
     }

     if (position.x() < 0 || position.y() < 0) {
         wl_resource_post_error(resource->handle, error_bad_value,
                                "negative position in set_source");
         return;
     }

     if (!size.isValid()) {
         wl_resource_post_error(resource->handle, error_bad_value,
                                "negative size in set_source");
         return;
     }

     auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
     surfacePrivate->pending.sourceGeometry = sourceGeometry;
 }

 void QWaylandWlScalerPrivate::Viewport::viewport_set_destination(QtWaylandServer::wl_viewport::Resource *resource, int32_t width, int32_t height)
 {
     Q_UNUSED(resource);

     if (!m_surface) {
         qCDebug(qLcWaylandCompositor) << "set_destination requested for destroyed surface";
         return;
     }

     QSize destinationSize(width, height);
     if (!destinationSize.isValid() && destinationSize != QSize(-1, -1)) {
         wl_resource_post_error(resource->handle, error_bad_value,
                                "negative size in set_destination");
         return;
     }
     auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
     surfacePrivate->pending.destinationSize = destinationSize;
 }
 #endif // QT_DEPRECATED_SINCE

 QT_END_NAMESPACE
	/****************************************************************************
	**
	** Copyright (C) 2018 The Qt Company Ltd.
	** Contact: http://www.qt.io/licensing/
	**
	** This file is part of the QtWaylandCompositor module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:LGPL3$
	** 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 http://www.qt.io/terms-conditions. For further
	** information use the contact form at http://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.LGPLv3 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.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 later as published by the Free
	** Software Foundation and appearing in the file LICENSE.GPL included in
	** the packaging of this file. Please review the following information to
	** ensure the GNU General Public License version 2.0 requirements will be
	** met: http://www.gnu.org/licenses/gpl-2.0.html.
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include "qwaylandwlscaler_p.h"

	#include <QtWaylandCompositor/QWaylandSurface>
	#include <QtWaylandCompositor/QWaylandCompositor>

	#include <QtWaylandCompositor/private/qwaylandsurface_p.h>

	QT_BEGIN_NAMESPACE

	#if QT_DEPRECATED_SINCE(5, 13)
	/*!
	\qmltype WlScaler
	\inqmlmodule QtWayland.Compositor
	\since 5.13
	\brief Provides an extension for surface resizing and cropping.

	The WlScaler extension provides a way for clients to resize and crop surface contents.

	WlScaler corresponds to the Wayland interface, \c wl_scaler.

	\c wl_scaler is a non-standard and deprecated protocol that has largely been replaced by
	\c wp_viewporter. I.e. This extensions is only useful for supporting legacy clients.
	\c wp_viewporter support is enabled automatically for all Qml compositors.

	To provide the functionality of the extension in a compositor, create an instance of the
	WlScaler component and add it to the list of extensions supported by the compositor:

	\qml \QtMinorVersion
	import QtWayland.Compositor 1.\1

	WaylandCompositor {
	// ...
	WlScaler {}
	}
	\endqml

	\deprecated
	*/

	/*!
	\class QWaylandWlScaler
	\inmodule QtWaylandCompositor
	\since 5.13
	\brief Provides an extension for surface resizing and croping.

	The QWaylandWlScaler extension provides a way for clients to resize and crop surface
	contents.

	QWaylandWlScaler corresponds to the Wayland interface, \c wl_scaler.

	\c wl_scaler is a non-standard and deprecated protocol that has largely been replaced by
	\c wp_viewporter. I.e. This extensions is only useful for supporting legacy clients.

	\sa QWaylandViewporter

	\deprecated
	*/

	/*!
	Constructs a QWaylandWlScaler object.
	*/
	QWaylandWlScaler::QWaylandWlScaler()
	: QWaylandCompositorExtensionTemplate<QWaylandWlScaler>(*new QWaylandWlScalerPrivate)
	{
	}

	/*!
	* Constructs a QWaylandWlScaler object for the provided \a compositor.
	*/
	QWaylandWlScaler::QWaylandWlScaler(QWaylandCompositor *compositor)
	: QWaylandCompositorExtensionTemplate<QWaylandWlScaler>(compositor, *new QWaylandWlScalerPrivate())
	{
	}

	/*!
	Initializes the extension.
	*/
	void QWaylandWlScaler::initialize()
	{
	Q_D(QWaylandWlScaler);

	QWaylandCompositorExtensionTemplate::initialize();
	auto compositor = static_cast<QWaylandCompositor >(extensionContainer());
	if (!compositor) {
	qWarning() << "Failed to find QWaylandCompositor when initializing QWaylandWlScaler";
	return;
	}
	d->init(compositor->display(), 2);
	}

	/*!
	Returns the Wayland interface for the QWaylandWlScaler.
	*/
	const wl_interface *QWaylandWlScaler::interface()
	{
	return QWaylandWlScalerPrivate::interface();
	}

	void QWaylandWlScalerPrivate::scaler_destroy(Resource *resource)
	{
	// Viewport objects are allowed ot outlive the scaler
	wl_resource_destroy(resource->handle);
	}

	void QWaylandWlScalerPrivate::scaler_get_viewport(Resource resource, uint id, wl_resource surfaceResource)
	{
	auto *surface = QWaylandSurface::fromResource(surfaceResource);
	if (!surface) {
	qWarning() << "Couldn't find surface for viewporter";
	return;
	}

	// Note: This will only protect us not creating scalers for surfaces with wp_viewport objects
	auto *surfacePrivate = QWaylandSurfacePrivate::get(surface);
	if (surfacePrivate->viewport) {
	wl_resource_post_error(resource->handle, WL_SCALER_ERROR_VIEWPORT_EXISTS,
	"viewport already exists for surface");
	return;
	}

	// We can't set viewport here, since it's of the new type for wp_viewporter
	// surfacePrivate->viewport = new Viewport(surface, resource->client(), id, resource->version());
	new Viewport(surface, resource->client(), id, resource->version());
	}

	QWaylandWlScalerPrivate::Viewport::Viewport(QWaylandSurface surface, wl_client client, int id, int version)
	: QtWaylandServer::wl_viewport(client, id, version)
	, m_surface(surface)
	{
	Q_ASSERT(surface);
	}

	//TODO: This isn't currently called
	// This function has to be called immediately after a surface is committed, before no
	// other client events have been dispatched, or we may incorrectly error out on an
	// incomplete pending state. See comment below.
	void QWaylandWlScalerPrivate::Viewport::checkCommittedState()
	{
	auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);

	// We can't use the current state for destination/source when checking,
	// as that has fallbacks to the buffer size so we can't distinguish
	// between the set/unset case. We use the pending state because no other
	// requests has modified it yet.
	QSize destination = surfacePrivate->pending.destinationSize;
	QRectF source = surfacePrivate->pending.sourceGeometry;

	if (!destination.isValid() && source.size() != source.size().toSize()) {
	//TODO: Do rounding to nearest integer
	}

	QRectF max = QRectF(QPointF(), m_surface->bufferSize() / m_surface->bufferScale());
	// We can't use QRectF.contains, because that would return false for values on the border
	if (max.united(source) != max) {
	//TODO: surface contents are no undefined, surface size is still valid though
	qCDebug(qLcWaylandCompositor) << "Source set outside buffer bounds (client error)";
	}
	}


	void QWaylandWlScalerPrivate::Viewport::viewport_destroy_resource(Resource *resource)
	{
	Q_UNUSED(resource);
	delete this;
	}

	void QWaylandWlScalerPrivate::Viewport::viewport_destroy(Resource *resource)
	{
	if (m_surface) {
	auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
	surfacePrivate->pending.destinationSize = QSize();
	surfacePrivate->pending.sourceGeometry = QRectF();
	}
	wl_resource_destroy(resource->handle);
	}

	void QWaylandWlScalerPrivate::Viewport::viewport_set(QtWaylandServer::wl_viewport::Resource *resource, wl_fixed_t src_x, wl_fixed_t src_y, wl_fixed_t src_width, wl_fixed_t src_height, int32_t dst_width, int32_t dst_height)
	{
	viewport_set_source(resource, src_x, src_y, src_width, src_height);
	viewport_set_destination(resource, dst_width, dst_height);
	}

	void QWaylandWlScalerPrivate::Viewport::viewport_set_source(QtWaylandServer::wl_viewport::Resource *resource, wl_fixed_t x, wl_fixed_t y, wl_fixed_t width, wl_fixed_t height)
	{
	Q_UNUSED(resource);

	if (!m_surface) {
	qCDebug(qLcWaylandCompositor) << "set_source requested for destroyed surface";
	return;
	}

	QPointF position(wl_fixed_to_double(x), wl_fixed_to_double(y));
	QSizeF size(wl_fixed_to_double(width), wl_fixed_to_double(height));
	QRectF sourceGeometry(position, size);

	if (sourceGeometry == QRectF(-1, -1, -1, -1)) {
	auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
	surfacePrivate->pending.sourceGeometry = QRectF();
	return;
	}

	if (position.x() < 0 \|\| position.y() < 0) {
	wl_resource_post_error(resource->handle, error_bad_value,
	"negative position in set_source");
	return;
	}

	if (!size.isValid()) {
	wl_resource_post_error(resource->handle, error_bad_value,
	"negative size in set_source");
	return;
	}

	auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
	surfacePrivate->pending.sourceGeometry = sourceGeometry;
	}

	void QWaylandWlScalerPrivate::Viewport::viewport_set_destination(QtWaylandServer::wl_viewport::Resource *resource, int32_t width, int32_t height)
	{
	Q_UNUSED(resource);

	if (!m_surface) {
	qCDebug(qLcWaylandCompositor) << "set_destination requested for destroyed surface";
	return;
	}

	QSize destinationSize(width, height);
	if (!destinationSize.isValid() && destinationSize != QSize(-1, -1)) {
	wl_resource_post_error(resource->handle, error_bad_value,
	"negative size in set_destination");
	return;
	}
	auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
	surfacePrivate->pending.destinationSize = destinationSize;
	}
	#endif // QT_DEPRECATED_SINCE

	QT_END_NAMESPACE