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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/drm/gpu/page_flip_request.h"
#include <utility>
#include "base/functional/bind.h"
#include "ui/gfx/presentation_feedback.h"
namespace ui {
PageFlipRequest::PageFlipRequest(const base::TimeDelta& refresh_interval)
: refresh_interval_(refresh_interval) {}
PageFlipRequest::~PageFlipRequest() = default;
void PageFlipRequest::TakeCallback(PresentationOnceCallback callback) {
DCHECK(!callback_);
callback_ = std::move(callback);
}
PageFlipRequest::PageFlipCallback PageFlipRequest::AddPageFlip() {
++page_flip_count_;
return base::BindOnce(&PageFlipRequest::Signal, this);
}
void PageFlipRequest::Signal(unsigned int frame, base::TimeTicks timestamp) {
if (--page_flip_count_ != 0 || callback_.is_null())
return;
// For Ozone DRM, the page flip is aligned with VSYNC, and the timestamp is
// provided by kernel DRM driver (kHWClock) and the buffer has been presented
// on the screen (kHWCompletion).
const uint32_t kFlags = gfx::PresentationFeedback::Flags::kVSync |
gfx::PresentationFeedback::Flags::kHWClock |
gfx::PresentationFeedback::Flags::kHWCompletion;
gfx::PresentationFeedback feedback(timestamp, refresh_interval_, kFlags);
std::move(callback_).Run(feedback);
}
} // namespace ui
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