root/ui/base/touch/touch_device_win.cc

DEFINITIONS

1. IsTouchDevicePresent
2. MaxTouchPoints

// Copyright (c) 2012 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/base/touch/touch_device.h"
#include "base/win/windows_version.h"
#include <windows.h>

namespace ui {

bool IsTouchDevicePresent() {
  int value = GetSystemMetrics(SM_DIGITIZER);
  return (value & NID_READY) &&
      ((value & NID_INTEGRATED_TOUCH) || (value & NID_EXTERNAL_TOUCH));
}

int MaxTouchPoints() {
  return GetSystemMetrics(SM_MAXIMUMTOUCHES);
}

}  // namespace ui