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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_XR_FRAME_TRANSPORT_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_XR_FRAME_TRANSPORT_H_
#include "device/vr/public/mojom/vr_service.mojom-blink.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "third_party/blink/public/platform/web_graphics_context_3d_provider.h"
#include "third_party/blink/renderer/platform/graphics/gpu/drawing_buffer.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/time.h"
namespace gfx {
class GpuFence;
}
namespace gpu {
namespace gles2 {
class GLES2Interface;
}
} // namespace gpu
namespace blink {
class GpuMemoryBufferImageCopy;
class Image;
class PLATFORM_EXPORT XRFrameTransport final
: public GarbageCollectedFinalized<XRFrameTransport>,
public device::mojom::blink::VRSubmitFrameClient {
public:
explicit XRFrameTransport();
~XRFrameTransport();
device::mojom::blink::VRSubmitFrameClientPtr GetSubmitFrameClient();
void PresentChange();
void SetTransportOptions(
device::mojom::blink::VRDisplayFrameTransportOptionsPtr);
bool DrawingIntoSharedBuffer();
// Call before finalizing the frame's image snapshot.
void FramePreImage(gpu::gles2::GLES2Interface*);
void FrameSubmit(device::mojom::blink::VRPresentationProvider*,
gpu::gles2::GLES2Interface*,
DrawingBuffer::Client*,
scoped_refptr<Image> image_ref,
std::unique_ptr<viz::SingleReleaseCallback>,
int16_t vr_frame_id,
bool needs_copy);
void FrameSubmitMissing(device::mojom::blink::VRPresentationProvider*,
gpu::gles2::GLES2Interface*,
int16_t vr_frame_id);
virtual void Trace(blink::Visitor*);
private:
void WaitForPreviousTransfer();
WTF::TimeDelta WaitForPreviousRenderToFinish();
WTF::TimeDelta WaitForGpuFenceReceived();
void CallPreviousFrameCallback();
// VRSubmitFrameClient
void OnSubmitFrameTransferred(bool success) override;
void OnSubmitFrameRendered() override;
void OnSubmitFrameGpuFence(const gfx::GpuFenceHandle&) override;
mojo::Binding<device::mojom::blink::VRSubmitFrameClient>
submit_frame_client_binding_;
// Used to keep the image alive until the next frame if using
// waitForPreviousTransferToFinish.
scoped_refptr<Image> previous_image_;
std::unique_ptr<viz::SingleReleaseCallback> previous_image_release_callback_;
bool waiting_for_previous_frame_transfer_ = false;
bool last_transfer_succeeded_ = false;
WTF::TimeDelta frame_wait_time_;
bool waiting_for_previous_frame_render_ = false;
// If using GpuFence to separate frames, need to wait for the previous
// frame's fence, but not if this is the first frame. Separately track
// if we're expecting a fence and the received fence itself.
bool waiting_for_previous_frame_fence_ = false;
std::unique_ptr<gfx::GpuFence> previous_frame_fence_;
device::mojom::blink::VRDisplayFrameTransportOptionsPtr transport_options_;
std::unique_ptr<GpuMemoryBufferImageCopy> frame_copier_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_XR_FRAME_TRANSPORT_H_
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