1 files changed, 259 insertions, 0 deletions
diff --git a/src/core/compositor/compositor_resource_tracker.cpp b/src/core/compositor/compositor_resource_tracker.cpp
new file mode 100644
index 000000000..6530f3249
--- /dev/null
+++ b/src/core/compositor/compositor_resource_tracker.cpp
@@ -0,0 +1,259 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 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 "compositor_resource_tracker.h"
+
+#include "chromium_gpu_helper.h"
+#include "render_widget_host_view_qt_delegate.h"
+#include "web_engine_context.h"
+
+#include "base/message_loop/message_loop.h"
+#include "base/task/post_task.h"
+#include "components/viz/common/quads/compositor_frame.h"
+#include "components/viz/common/resources/returned_resource.h"
+#include "components/viz/service/display_embedder/server_shared_bitmap_manager.h"
+#include "content/browser/browser_main_loop.h"
+#include "content/public/browser/browser_task_traits.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/gpu/content_gpu_client.h"
+#include "gpu/command_buffer/service/mailbox_manager.h"
+#include "gpu/command_buffer/service/sync_point_manager.h"
+
+namespace QtWebEngineCore {
+
+CompositorResourceTracker::CompositorResourceTracker()
+{}
+
+CompositorResourceTracker::~CompositorResourceTracker()
+{}
+
+void CompositorResourceTracker::submitResources(const viz::CompositorFrame &frame, base::OnceClosure callback)
+{
+    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+    DCHECK(!m_submitCallback);
+    DCHECK(m_pendingResources.empty());
+    DCHECK(m_pendingImports.empty());
+    DCHECK(m_pendingResourceUpdates == 0);
+
+    m_submitCallback = std::move(callback);
+
+    m_pendingResources.reserve(frame.resource_list.size());
+    m_pendingImports.reserve(frame.resource_list.size());
+
+    for (const viz::TransferableResource &transferableResource : frame.resource_list) {
+        auto it = m_committedResources.find(transferableResource.id);
+        if (it != m_committedResources.end())
+            m_pendingImports.push_back(&*it);
+        else
+            m_pendingResources.emplace_back(transferableResource);
+    }
+
+    if (m_pendingResources.empty()) {
+        scheduleRunSubmitCallback();
+        return;
+    }
+
+    m_pendingResourceUpdates = m_pendingResources.size();
+
+    std::vector<CompositorResource *> batch;
+    batch.reserve(m_pendingResources.size());
+
+    for (CompositorResource &resource : m_pendingResources) {
+        if (resource.is_software)
+            updateBitmap(&resource);
+        else if (!scheduleUpdateMailbox(&resource))
+            batch.push_back(&resource);
+    }
+
+    if (!batch.empty())
+        scheduleUpdateMailboxes(std::move(batch));
+}
+
+void CompositorResourceTracker::commitResources()
+{
+    // DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+    //
+    // This might be called from a Qt Quick render thread, but the UI thread
+    // will still be blocked for the duration of this call.
+
+    DCHECK(m_pendingResourceUpdates == 0);
+
+    for (CompositorResource *resource : m_pendingImports)
+        resource->import_count++;
+    m_pendingImports.clear();
+
+    m_committedResources.insert(std::make_move_iterator(m_pendingResources.begin()),
+                                std::make_move_iterator(m_pendingResources.end()));
+    m_pendingResources.clear();
+
+    ++m_committedFrameId;
+}
+
+std::vector<viz::ReturnedResource> CompositorResourceTracker::returnResources()
+{
+    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+    std::vector<viz::ReturnedResource> returnedResources;
+    base::EraseIf(m_committedResources, [&](const CompositorResource &resource) {
+        if (resource.last_used_for_frame != m_committedFrameId) {
+            viz::ReturnedResource returnedResource;
+            returnedResource.id = resource.id;
+            returnedResource.count = resource.import_count;
+            returnedResources.push_back(std::move(returnedResource));
+            return true;
+        }
+        return false;
+    });
+    return returnedResources;
+}
+
+const CompositorResource *CompositorResourceTracker::findResource(CompositorResourceId id) const
+{
+    auto it = m_committedResources.find(id);
+    DCHECK(it != m_committedResources.end());
+
+    const_cast<CompositorResource &>(*it).last_used_for_frame = m_committedFrameId;
+
+    return &*it;
+}
+
+void CompositorResourceTracker::updateBitmap(CompositorResource *resource)
+{
+    content::BrowserMainLoop *browserMainLoop = content::BrowserMainLoop::GetInstance();
+    viz::ServerSharedBitmapManager *bitmapManager = browserMainLoop->GetServerSharedBitmapManager();
+
+    resource->bitmap = bitmapManager->GetSharedBitmapFromId(
+        resource->size,
+        viz::BGRA_8888,
+        resource->mailbox_holder.mailbox);
+
+    if (--m_pendingResourceUpdates == 0)
+        scheduleRunSubmitCallback();
+}
+
+quint32 CompositorResourceTracker::consumeMailbox(const gpu::MailboxHolder &mailboxHolder)
+{
+#if QT_CONFIG(opengl)
+    gpu::MailboxManager *mailboxManager = mailbox_manager();
+    DCHECK(mailboxManager);
+    if (mailboxHolder.sync_token.HasData())
+        mailboxManager->PullTextureUpdates(mailboxHolder.sync_token);
+    return service_id(mailboxManager->ConsumeTexture(mailboxHolder.mailbox));
+#else
+    NOTREACHED();
+#endif // QT_CONFIG(OPENGL)
+}
+
+bool CompositorResourceTracker::scheduleUpdateMailbox(CompositorResource *resource)
+{
+#if QT_CONFIG(opengl)
+    gpu::SyncPointManager *syncPointManager = WebEngineContext::syncPointManager();
+    DCHECK(syncPointManager);
+    return syncPointManager->WaitOutOfOrder(
+        resource->mailbox_holder.sync_token,
+        base::BindOnce(&CompositorResourceTracker::updateMailbox,
+                       m_weakPtrFactory.GetWeakPtr(),
+                       resource));
+#else
+    NOTREACHED();
+#endif // QT_CONFIG(OPENGL)
+}
+
+void CompositorResourceTracker::updateMailbox(CompositorResource *resource)
+{
+#if QT_CONFIG(opengl)
+    resource->texture_id = consumeMailbox(resource->mailbox_holder);
+    resource->texture_fence = CompositorResourceFence::create();
+
+    if (--m_pendingResourceUpdates == 0)
+        scheduleRunSubmitCallback();
+#else
+    NOTREACHED();
+#endif // QT_CONFIG(OPENGL)
+}
+
+void CompositorResourceTracker::scheduleUpdateMailboxes(std::vector<CompositorResource *> resources)
+{
+#if QT_CONFIG(opengl)
+    scoped_refptr<base::SingleThreadTaskRunner> gpuTaskRunner = gpu_task_runner();
+    DCHECK(gpuTaskRunner);
+    gpuTaskRunner->PostTask(
+        FROM_HERE,
+        base::BindOnce(&CompositorResourceTracker::updateMailboxes,
+                       m_weakPtrFactory.GetWeakPtr(),
+                       std::move(resources)));
+#else
+    NOTREACHED();
+#endif // QT_CONFIG(OPENGL)
+}
+
+void CompositorResourceTracker::updateMailboxes(std::vector<CompositorResource *> resources)
+{
+#if QT_CONFIG(opengl)
+    for (CompositorResource *resource : resources)
+        resource->texture_id = consumeMailbox(resource->mailbox_holder);
+
+    scoped_refptr<CompositorResourceFence> fence = CompositorResourceFence::create();
+
+    for (CompositorResource *resource : resources)
+        resource->texture_fence = fence;
+
+    if ((m_pendingResourceUpdates -= resources.size()) == 0)
+        scheduleRunSubmitCallback();
+#else
+    NOTREACHED();
+#endif // QT_CONFIG(OPENGL)
+}
+
+void CompositorResourceTracker::scheduleRunSubmitCallback()
+{
+    base::PostTaskWithTraits(
+        FROM_HERE, { content::BrowserThread::UI },
+        base::BindOnce(&CompositorResourceTracker::runSubmitCallback,
+                       m_weakPtrFactory.GetWeakPtr()));
+}
+
+void CompositorResourceTracker::runSubmitCallback()
+{
+    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+    std::move(m_submitCallback).Run();
+}
+
+} // namespace QtWebEngineCore