1 files changed, 121 insertions, 0 deletions
diff --git a/src/core/compositor/display_gl_output_surface_qsg.cpp b/src/core/compositor/display_gl_output_surface_qsg.cpp
new file mode 100644
index 000000000..2f7b3de84
--- /dev/null
+++ b/src/core/compositor/display_gl_output_surface_qsg.cpp
@@ -0,0 +1,121 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtWebEngine 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "display_gl_output_surface.h"
+
+#include "compositor_resource_fence.h"
+#include "render_widget_host_view_qt_delegate.h"
+#include "type_conversion.h"
+
+#include <QOpenGLFunctions>
+#include <QSGImageNode>
+#include <QSGTexture>
+
+namespace QtWebEngineCore {
+
+class DisplayGLOutputSurface::Texture final : public QSGTexture
+{
+public:
+    Texture(uint32_t id, QSize sizeInPixels, bool hasAlphaChannel, scoped_refptr<CompositorResourceFence> fence)
+        : m_id(id)
+        , m_sizeInPixels(sizeInPixels)
+        , m_hasAlphaChannel(hasAlphaChannel)
+        , m_fence(std::move(fence))
+    {
+    }
+
+    // QSGTexture:
+    int textureId() const override { return m_id; }
+    QSize textureSize() const override { return m_sizeInPixels; }
+    bool hasAlphaChannel() const override { return m_hasAlphaChannel; }
+    bool hasMipmaps() const override { return false; }
+    void bind() override
+    {
+        if (m_fence) {
+            m_fence->wait();
+            m_fence.reset();
+        }
+
+        QOpenGLContext *context = QOpenGLContext::currentContext();
+        QOpenGLFunctions *funcs = context->functions();
+        funcs->glBindTexture(GL_TEXTURE_2D, m_id);
+    }
+
+private:
+    uint32_t m_id;
+    QSize m_sizeInPixels;
+    bool m_hasAlphaChannel;
+    scoped_refptr<CompositorResourceFence> m_fence;
+};
+
+QSGNode *DisplayGLOutputSurface::updatePaintNode(QSGNode *oldNode, RenderWidgetHostViewQtDelegate *delegate)
+{
+    {
+        QMutexLocker locker(&m_mutex);
+        if (m_middleBuffer && m_middleBuffer->serviceId) {
+            std::swap(m_middleBuffer, m_frontBuffer);
+            m_taskRunner->PostTask(
+                    FROM_HERE,
+                    base::BindOnce(&DisplayGLOutputSurface::swapBuffersOnVizThread, base::Unretained(this)));
+            m_taskRunner.reset();
+        }
+    }
+
+    if (!m_frontBuffer)
+        return oldNode;
+
+    auto node = static_cast<QSGImageNode *>(oldNode);
+    if (!node)
+        node = delegate->createImageNode();
+
+    QSize sizeInPixels = toQt(m_frontBuffer->shape.sizeInPixels);
+    QSizeF sizeInDips = QSizeF(sizeInPixels) / m_frontBuffer->shape.devicePixelRatio;
+    QRectF rectInDips(QPointF(0, 0), sizeInDips);
+    node->setRect(rectInDips);
+    node->setOwnsTexture(true);
+    node->setTexture(new Texture(m_frontBuffer->serviceId,
+                                 sizeInPixels,
+                                 m_frontBuffer->shape.hasAlpha,
+                                 m_frontBuffer->fence));
+    node->setTextureCoordinatesTransform(QSGImageNode::MirrorVertically);
+
+    return node;
+}
+
+} // namespace QtWebEngineCore