ui/base/l10n/l10n_util_win_unittest.cc

   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/base/win/dpi.h"
  13
  14 typedef PlatformTest L10nUtilWinTest;
  15
  16 TEST_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 }