File: renderer_base.cc

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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/demo/renderer_base.h"

#include <numbers>

namespace ui {

namespace {
const int kAnimationSteps = 240;
}  // namespace

RendererBase::RendererBase(gfx::AcceleratedWidget widget, const gfx::Size& size)
    : widget_(widget), size_(size) {
}

RendererBase::~RendererBase() {
}

float RendererBase::CurrentFraction() const {
  float fraction =
      (sinf(iteration_ * 2 * std::numbers::pi_v<float> / kAnimationSteps) + 1) /
      2;
  return fraction;
}

float RendererBase::NextFraction() {
  float fraction = CurrentFraction();
  iteration_++;
  iteration_ %= kAnimationSteps;
  return fraction;
}

}  // namespace ui