840268aa7e
Summary: This implements a wrapper class for the wl_eglstream_controller Wayland interface. It allows clients to inform the compositor when a new EGL Stream has been created with an Wayland surface attached as its producer. The compositor can then bind a GL texture as the stream's consumer allowing it access to the surface's buffer contents for presentation. The only client currently expected to make use of this interface is the NVIDIA EGL driver when running alongside a compositor supporting EGLStream-based buffer sharing. Reviewers: #kwin, romangg, davidedmundson Reviewed By: #kwin, romangg, davidedmundson Subscribers: kde-frameworks-devel Tage: #frameworks Differential Revision: https://phabricator.kde.org/D18824
107 lines
4 KiB
C++
107 lines
4 KiB
C++
/****************************************************************************
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Copyright 2019 NVIDIA Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) version 3, or any
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later version accepted by the membership of KDE e.V. (or its
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successor approved by the membership of KDE e.V.), which shall
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act as a proxy defined in Section 6 of version 3 of the license.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#include "eglstream_controller_interface_p.h"
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#include "clientconnection.h"
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#include "display.h"
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#include "logging.h"
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#include <wayland-util.h>
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#include <QLibrary>
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namespace KWayland
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{
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namespace Server
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{
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const quint32 EglStreamControllerInterface::Private::s_version = 1;
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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const struct wl_eglstream_controller_interface EglStreamControllerInterface::Private::s_interface = {
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attachStreamConsumer,
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attachStreamConsumerAttribs
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};
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#endif
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void EglStreamControllerInterface::Private::attachStreamConsumer(wl_client *client,
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wl_resource *resource,
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wl_resource *surface,
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wl_resource *eglStream)
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{
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wl_array noAttribs = { 0, 0, nullptr };
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attachStreamConsumerAttribs(client, resource, surface, eglStream, &noAttribs);
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}
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void EglStreamControllerInterface::Private::attachStreamConsumerAttribs(wl_client *client,
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wl_resource *resource,
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wl_resource *surface,
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wl_resource *eglStream,
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wl_array *attribs)
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{
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Q_UNUSED(client);
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Private *p = reinterpret_cast<Private *>(wl_resource_get_user_data(resource));
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emit p->q->streamConsumerAttached(SurfaceInterface::get(surface), eglStream, attribs);
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}
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EglStreamControllerInterface::Private::Private(EglStreamControllerInterface *q, Display *display)
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// libnvidia-egl-wayland.so.1 may not be present on all systems, so we load it dynamically
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: Global::Private(display,
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(wl_interface *)QLibrary::resolve(QLatin1String("libnvidia-egl-wayland.so.1"),
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"wl_eglstream_controller_interface"),
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s_version)
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, q(q)
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{
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}
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void EglStreamControllerInterface::Private::create()
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{
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// bail out early if we were unable to load the interface
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if (m_interface == nullptr) {
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qCWarning(KWAYLAND_SERVER) << "failed to resolve wl_eglstream_controller_interface";
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return;
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}
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Global::Private::create();
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}
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void EglStreamControllerInterface::Private::bind(wl_client *client, uint32_t version, uint32_t id)
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{
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wl_resource *r = display->getConnection(client)->createResource(m_interface, version, id);
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if (r == nullptr) {
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wl_client_post_no_memory(client);
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return;
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}
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wl_resource_set_implementation(r, &s_interface, this, nullptr);
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}
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EglStreamControllerInterface::~EglStreamControllerInterface() = default;
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EglStreamControllerInterface::EglStreamControllerInterface(Display *display, QObject *parent)
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: Global(new Private(this, display), parent)
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{
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}
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void EglStreamControllerInterface::create()
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{
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static_cast<Private &>(*d).create();
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}
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}
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}
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