1 files changed, 89 insertions, 0 deletions
diff --git a/src/core/compositor/display_skia_output_device.h b/src/core/compositor/display_skia_output_device.h
new file mode 100644
index 000000000..e6a97b810
--- /dev/null
+++ b/src/core/compositor/display_skia_output_device.h
@@ -0,0 +1,89 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef DISPLAY_SKIA_OUTPUT_DEVICE_H
+#define DISPLAY_SKIA_OUTPUT_DEVICE_H
+
+#include <QtCore/QMutex>
+#include <QtWebEngineCore/private/qtwebenginecoreglobal_p.h>
+
+#include "compositor.h"
+
+#include "base/task/single_thread_task_runner.h"
+#include "components/viz/service/display_embedder/skia_output_device.h"
+#include "gpu/command_buffer/service/shared_context_state.h"
+
+QT_BEGIN_NAMESPACE
+class QQuickWindow;
+QT_END_NAMESPACE
+
+namespace QtWebEngineCore {
+
+class DisplaySkiaOutputDevice final : public viz::SkiaOutputDevice, public Compositor
+{
+public:
+    DisplaySkiaOutputDevice(scoped_refptr<gpu::SharedContextState> contextState,
+                            bool requiresAlpha,
+                            gpu::MemoryTracker *memoryTracker,
+                            DidSwapBufferCompleteCallback didSwapBufferCompleteCallback);
+    ~DisplaySkiaOutputDevice() override;
+
+    // Overridden from SkiaOutputDevice.
+    void SetFrameSinkId(const viz::FrameSinkId &frame_sink_id) override;
+    bool Reshape(const SkImageInfo &image_info,
+                 const gfx::ColorSpace &color_space,
+                 int sample_count,
+                 float device_scale_factor,
+                 gfx::OverlayTransform transform) override;
+    void Present(const absl::optional<gfx::Rect>& update_rect,
+                 BufferPresentedCallback feedback,
+                 viz::OutputSurfaceFrame frame) override;
+    void EnsureBackbuffer() override;
+    void DiscardBackbuffer() override;
+    SkSurface *BeginPaint(std::vector<GrBackendSemaphore> *semaphores) override;
+    void EndPaint() override;
+
+    // Overridden from Compositor.
+    void swapFrame() override;
+    void waitForTexture() override;
+    QSGTexture *texture(QQuickWindow *win, uint32_t texOpts) override;
+    bool textureIsFlipped() override;
+    QSize size() override;
+    bool requiresAlphaChannel() override;
+    float devicePixelRatio() override;
+
+private:
+    struct Shape
+    {
+        SkImageInfo imageInfo;
+        float devicePixelRatio;
+        gfx::ColorSpace colorSpace;
+
+        bool operator==(const Shape &that) const
+        {
+            return (imageInfo == that.imageInfo &&
+                    devicePixelRatio == that.devicePixelRatio &&
+                    colorSpace == that.colorSpace);
+        }
+        bool operator!=(const Shape &that) const { return !(*this == that); }
+    };
+
+    class Buffer;
+
+    void SwapBuffersFinished();
+
+    mutable QMutex m_mutex;
+    scoped_refptr<gpu::SharedContextState> m_contextState;
+    Shape m_shape;
+    std::unique_ptr<Buffer> m_frontBuffer;
+    std::unique_ptr<Buffer> m_middleBuffer;
+    std::unique_ptr<Buffer> m_backBuffer;
+    viz::OutputSurfaceFrame m_frame;
+    bool m_readyToUpdate = false;
+    bool m_requiresAlpha;
+    scoped_refptr<base::SingleThreadTaskRunner> m_taskRunner;
+};
+
+} // namespace QtWebEngineCore
+
+#endif // !DISPLAY_SKIA_OUTPUT_DEVICE_H