chromium/cc/trees/mobile_optimized_viewport_util.cc

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/trees/mobile_optimized_viewport_util.h"

#include "base/feature_list.h"
#include "cc/base/features.h"
#include "ui/gfx/geometry/size_f.h"

namespace cc {
namespace util {
namespace {
// Used to accommodate finite precision when comparing scaled viewport and
// content widths. While this value may seem large, width=device-width on an N7
// V1 saw errors of ~0.065 between computed window and content widths.
const float kMobileViewportWidthEpsilon = …;
}  // namespace

bool IsMobileOptimized(float min_page_scale_factor,
                       float max_page_scale_factor,
                       float current_page_scale_factor,
                       gfx::SizeF scrollable_viewport_size,
                       gfx::SizeF scrollable_size,
                       bool viewport_meta_mobile_optimized) { … }

}  // namespace util
}  // namespace cc