Implement wl_eglstream_controller Server Interface
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/D18824master
Erik Kurzinger
6 years ago
parent
6dd0e17759
commit
840268aa7e
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/****************************************************************************
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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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@ -0,0 +1,67 @@
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/****************************************************************************
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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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#ifndef WAYLAND_SERVER_EGLSTREAM_CONTROLLER_INTERFACE_H
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#define WAYLAND_SERVER_EGLSTREAM_CONTROLLER_INTERFACE_H
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#include "global.h"
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#include "surface_interface.h"
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#include <KWayland/Server/kwaylandserver_export.h>
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#include <wayland-util.h>
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#include <QObject>
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namespace KWayland
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{
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namespace Server
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{
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class Display;
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/**
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* @brief Represents the Global for the wl_eglstream_controller interface.
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*
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* This class handles requests (typically from the NVIDIA EGL driver) to attach
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* a newly created EGL Stream to a Wayland surface, facilitating the sharing
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* of buffer contents between client and compositor.
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*
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*/
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class KWAYLANDSERVER_EXPORT EglStreamControllerInterface : public Global
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{
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Q_OBJECT
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public:
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~EglStreamControllerInterface() override;
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void create();
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Q_SIGNALS:
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/**
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* Emitted when a new stream attach request is received.
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*/
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void streamConsumerAttached(SurfaceInterface *surface, void *eglStream, wl_array *attribs);
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private:
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explicit EglStreamControllerInterface(Display *display, QObject *parent = nullptr);
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class Private;
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friend class Display;
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};
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}
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}
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#endif
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@ -0,0 +1,58 @@
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/****************************************************************************
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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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#ifndef WAYLAND_SERVER_EGLSTREAM_CONTROLLER_INTERFACE_P_H
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#define WAYLAND_SERVER_EGLSTREAM_CONTROLLER_INTERFACE_P_H
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#include "eglstream_controller_interface.h"
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#include "global_p.h"
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#include <wayland-eglstream-controller-server-protocol.h>
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namespace KWayland
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{
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namespace Server
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{
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class Q_DECL_HIDDEN EglStreamControllerInterface::Private : public Global::Private
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{
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public:
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Private(EglStreamControllerInterface *controller, Display *display);
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void create();
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private:
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static void 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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static void 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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static const struct wl_eglstream_controller_interface s_interface;
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static const quint32 s_version;
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void bind(wl_client *client, uint32_t version, uint32_t id) override;
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EglStreamControllerInterface *q;
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};
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}
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}
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#endif
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