wl_eglstream_controller implementation for NVIDIA

This adds a new client buffer integration: wayland-eglstream-controller,
which contains the EGLStream logic from wayland-egl, and additionally
uses NVIDIA's wayland-eglstream-controller protocol to avoid the issue
where the stream is not ready at the time of first buffer attach.

This is not enabled by default. Can be used like this:
QT_WAYLAND_CLIENT_BUFFER_INTEGRATION=wayland-eglstream-controller ./pure-qml

Fixes: QTBUG-71697
Change-Id: I73bb2a8fe9852afe1b5807cbb8c35dc4c7624dad
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

1 files changed, 93 insertions, 0 deletions

diff --git a/src/hardwareintegration/compositor/wayland-eglstream-controller/waylandeglstreamintegration.h b/src/hardwareintegration/compositor/wayland-eglstream-controller/waylandeglstreamintegration.h
new file mode 100644
index 000000000..d19302049
--- /dev/null
+++ b/src/hardwareintegration/compositor/wayland-eglstream-controller/waylandeglstreamintegration.h
@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtWaylandCompositor 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef WAYLANDEGLSTREAMINTEGRATION_H
+#define WAYLANDEGLSTREAMINTEGRATION_H
+
+#include <QtWaylandCompositor/private/qwlclientbufferintegration_p.h>
+#include <QtCore/QScopedPointer>
+#include <QtWaylandCompositor/private/qwlclientbuffer_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class WaylandEglStreamClientBufferIntegrationPrivate;
+
+class WaylandEglStreamClientBufferIntegration : public QtWayland::ClientBufferIntegration
+{
+    Q_DECLARE_PRIVATE(WaylandEglStreamClientBufferIntegration)
+public:
+    WaylandEglStreamClientBufferIntegration();
+    ~WaylandEglStreamClientBufferIntegration() override;
+
+    void initializeHardware(struct ::wl_display *display) override;
+
+    QtWayland::ClientBuffer *createBufferFor(wl_resource *buffer) override;
+
+    void attachEglStreamConsumer(struct ::wl_resource *wl_surface, struct ::wl_resource *wl_buffer);
+
+private:
+    Q_DISABLE_COPY(WaylandEglStreamClientBufferIntegration)
+    QScopedPointer<WaylandEglStreamClientBufferIntegrationPrivate> d_ptr;
+};
+
+struct BufferState;
+
+class WaylandEglStreamClientBuffer : public QtWayland::ClientBuffer
+{
+public:
+    ~WaylandEglStreamClientBuffer() override;
+
+    QWaylandBufferRef::BufferFormatEgl bufferFormatEgl() const override;
+    QSize size() const override;
+    QWaylandSurface::Origin origin() const override;
+    QOpenGLTexture *toOpenGlTexture(int plane) override;
+    void setCommitted(QRegion &damage) override;
+
+private:
+    friend class WaylandEglStreamClientBufferIntegration;
+    friend class WaylandEglStreamClientBufferIntegrationPrivate;
+
+    WaylandEglStreamClientBuffer(WaylandEglStreamClientBufferIntegration* integration, wl_resource *bufferResource);
+
+    BufferState *d = nullptr;
+    WaylandEglStreamClientBufferIntegration *m_integration = nullptr;
+};
+
+QT_END_NAMESPACE
+
+#endif // WAYLANDEGLSTREAMINTEGRATION_H