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// Copyright 2014 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.
#include "ui/ozone/platform/drm/gpu/drm_vsync_provider.h"
#include "base/time/time.h"
#include "ui/ozone/platform/drm/gpu/drm_window.h"
#include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
namespace ui {
DrmVSyncProvider::DrmVSyncProvider(DrmWindow* window_delegate)
: window_delegate_(window_delegate) {
}
DrmVSyncProvider::~DrmVSyncProvider() {
}
void DrmVSyncProvider::GetVSyncParameters(const UpdateVSyncCallback& callback) {
HardwareDisplayController* controller = window_delegate_->GetController();
if (!controller)
return;
// The value is invalid, so we can't update the parameters.
if (controller->GetTimeOfLastFlip() == 0 ||
controller->get_mode().vrefresh == 0)
return;
// Stores the time of the last refresh.
base::TimeTicks timebase =
base::TimeTicks::FromInternalValue(controller->GetTimeOfLastFlip());
// Stores the refresh rate.
base::TimeDelta interval =
base::TimeDelta::FromSeconds(1) / controller->get_mode().vrefresh;
callback.Run(timebase, interval);
}
} // namespace ui
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