qt-everywhere-src-5.14.1/qtwayland/src/compositor/extensions/qwaylandviewporter.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 "qwaylandviewporter_p.h"

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

 #include <QtWaylandCompositor/private/qwaylandsurface_p.h>

 QT_BEGIN_NAMESPACE

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

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

     QWaylandViewporter corresponds to the Wayland interface, \c wp_viewporter.
 */

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

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

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

     QWaylandCompositorExtensionTemplate::initialize();
     auto *compositor = static_cast<QWaylandCompositor *>(extensionContainer());
     if (!compositor) {
         qWarning() << "Failed to find QWaylandCompositor when initializing QWaylandViewporter";
         return;
     }
     d->init(compositor->display(), 1);
 }

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

 void QWaylandViewporterPrivate::wp_viewporter_destroy(Resource *resource)
 {
     // Viewport objects are allowed ot outlive the viewporter
     wl_resource_destroy(resource->handle);
 }

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

     auto *surfacePrivate = QWaylandSurfacePrivate::get(surface);
     if (surfacePrivate->viewport) {
         wl_resource_post_error(resource->handle, WP_VIEWPORTER_ERROR_VIEWPORT_EXISTS,
                                "viewport already exists for surface");
         return;
     }

     surfacePrivate->viewport = new Viewport(surface, resource->client(), id);
 }

 QWaylandViewporterPrivate::Viewport::Viewport(QWaylandSurface *surface, wl_client *client, int id)
     : QtWaylandServer::wp_viewport(client, id, /*version*/ 1)
     , m_surface(surface)
 {
     Q_ASSERT(surface);
 }

 QWaylandViewporterPrivate::Viewport::~Viewport()
 {
     if (m_surface) {
         auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
         Q_ASSERT(surfacePrivate->viewport == this);
         surfacePrivate->viewport = nullptr;
     }
 }

 // 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 QWaylandViewporterPrivate::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()) {
         wl_resource_post_error(resource()->handle, error_bad_size,
                                "non-integer size (%fx%f) with unset destination",
                                source.width(), source.height());
         return;
     }

     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) {
         wl_resource_post_error(resource()->handle, error_out_of_buffer,
                                "source %f,%f, %fx%f extends outside attached buffer %fx%f",
                                source.x(), source.y(), source.width(), source.height(),
                                max.width(), max.height());
         return;
     }
 }


 void QWaylandViewporterPrivate::Viewport::wp_viewport_destroy_resource(Resource *resource)
 {
     Q_UNUSED(resource);
     delete this;
 }

 void QWaylandViewporterPrivate::Viewport::wp_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 QWaylandViewporterPrivate::Viewport::wp_viewport_set_source(QtWaylandServer::wp_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) {
         wl_resource_post_error(resource->handle, error_no_surface,
                                "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 QWaylandViewporterPrivate::Viewport::wp_viewport_set_destination(QtWaylandServer::wp_viewport::Resource *resource, int32_t width, int32_t height)
 {
     Q_UNUSED(resource);

     if (!m_surface) {
         wl_resource_post_error(resource->handle, error_no_surface,
                                "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;
 }

 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 "qwaylandviewporter_p.h"

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

	#include <QtWaylandCompositor/private/qwaylandsurface_p.h>

	QT_BEGIN_NAMESPACE

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

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

	QWaylandViewporter corresponds to the Wayland interface, \c wp_viewporter.
	*/

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

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

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

	QWaylandCompositorExtensionTemplate::initialize();
	auto compositor = static_cast<QWaylandCompositor >(extensionContainer());
	if (!compositor) {
	qWarning() << "Failed to find QWaylandCompositor when initializing QWaylandViewporter";
	return;
	}
	d->init(compositor->display(), 1);
	}

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

	void QWaylandViewporterPrivate::wp_viewporter_destroy(Resource *resource)
	{
	// Viewport objects are allowed ot outlive the viewporter
	wl_resource_destroy(resource->handle);
	}

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

	auto *surfacePrivate = QWaylandSurfacePrivate::get(surface);
	if (surfacePrivate->viewport) {
	wl_resource_post_error(resource->handle, WP_VIEWPORTER_ERROR_VIEWPORT_EXISTS,
	"viewport already exists for surface");
	return;
	}

	surfacePrivate->viewport = new Viewport(surface, resource->client(), id);
	}

	QWaylandViewporterPrivate::Viewport::Viewport(QWaylandSurface surface, wl_client client, int id)
	: QtWaylandServer::wp_viewport(client, id, /version/ 1)
	, m_surface(surface)
	{
	Q_ASSERT(surface);
	}

	QWaylandViewporterPrivate::Viewport::~Viewport()
	{
	if (m_surface) {
	auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
	Q_ASSERT(surfacePrivate->viewport == this);
	surfacePrivate->viewport = nullptr;
	}
	}

	// 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 QWaylandViewporterPrivate::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()) {
	wl_resource_post_error(resource()->handle, error_bad_size,
	"non-integer size (%fx%f) with unset destination",
	source.width(), source.height());
	return;
	}

	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) {
	wl_resource_post_error(resource()->handle, error_out_of_buffer,
	"source %f,%f, %fx%f extends outside attached buffer %fx%f",
	source.x(), source.y(), source.width(), source.height(),
	max.width(), max.height());
	return;
	}
	}


	void QWaylandViewporterPrivate::Viewport::wp_viewport_destroy_resource(Resource *resource)
	{
	Q_UNUSED(resource);
	delete this;
	}

	void QWaylandViewporterPrivate::Viewport::wp_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 QWaylandViewporterPrivate::Viewport::wp_viewport_set_source(QtWaylandServer::wp_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) {
	wl_resource_post_error(resource->handle, error_no_surface,
	"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 QWaylandViewporterPrivate::Viewport::wp_viewport_set_destination(QtWaylandServer::wp_viewport::Resource *resource, int32_t width, int32_t height)
	{
	Q_UNUSED(resource);

	if (!m_surface) {
	wl_resource_post_error(resource->handle, error_no_surface,
	"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;
	}

	QT_END_NAMESPACE