1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/base/l10n/l10n_util_win.h"
6
7#include <windows.h>
8
9#include "base/win/win_util.h"
10#include "testing/gtest/include/gtest/gtest.h"
11#include "testing/platform_test.h"
12#include "ui/gfx/win/dpi.h"
13
14typedef PlatformTest L10nUtilWinTest;
15
16TEST_F(L10nUtilWinTest, TestDPIScaling) {
17  // Baseline font for comparison.
18  NONCLIENTMETRICS metrics;
19  base::win::GetNonClientMetrics(&metrics);
20  LOGFONT lf = metrics.lfMessageFont;
21  l10n_util::AdjustUIFont(&lf);
22  int size = lf.lfHeight;
23  float rounding = size < 0 ? -0.5f : 0.5f;
24
25  // Test that font size is properly normalized for DIP. In high-DPI mode, the
26  // font metrics are scaled based on the DPI scale factor. For Windows 8, 140%
27  // and 180% font scaling are supported. Simulate size normalization for a DPI-
28  // aware process by manually scaling up the font and checking that it returns
29  // to the expected size.
30  lf.lfHeight = static_cast<int>(1.4 * size + rounding);
31  l10n_util::AdjustUIFontForDIP(1.4f, &lf);
32  EXPECT_NEAR(size, lf.lfHeight, 1);
33
34  lf.lfHeight = static_cast<int>(1.8 * size + rounding);
35  l10n_util::AdjustUIFontForDIP(1.8f, &lf);
36  EXPECT_NEAR(size, lf.lfHeight, 1);
37}