1 // Copyright (c) 2012 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.
5 #include "ui/gfx/platform_font_win.h"
7 #include "base/logging.h"
8 #include "base/memory/ref_counted.h"
9 #include "base/strings/string16.h"
10 #include "base/strings/utf_string_conversions.h"
11 #include "base/win/scoped_hdc.h"
12 #include "base/win/scoped_select_object.h"
13 #include "testing/gtest/include/gtest/gtest.h"
14 #include "ui/gfx/font.h"
15 #include "ui/gfx/win/direct_write.h"
16 #include "ui/gfx/win/scoped_set_map_mode.h"
20 TEST(PlatformFontWinTest
, DeriveFontWithHeight
) {
22 PlatformFontWin
* platform_font
=
23 static_cast<PlatformFontWin
*>(base_font
.platform_font());
25 for (int i
= -10; i
< 10; i
++) {
26 const int target_height
= base_font
.GetHeight() + i
;
28 Font derived_font
= platform_font
->DeriveFontWithHeight(target_height
, 0);
29 EXPECT_LE(derived_font
.GetHeight(), target_height
);
30 EXPECT_GT(derived_font
.Derive(1, 0).GetHeight(), target_height
);
31 EXPECT_EQ(platform_font
->GetActualFontNameForTesting(),
32 derived_font
.GetActualFontNameForTesting());
33 EXPECT_EQ(0, derived_font
.GetStyle());
35 derived_font
= platform_font
->DeriveFontWithHeight(target_height
,
37 EXPECT_LE(derived_font
.GetHeight(), target_height
);
38 EXPECT_GT(derived_font
.Derive(1, 0).GetHeight(), target_height
);
39 EXPECT_EQ(platform_font
->GetActualFontNameForTesting(),
40 derived_font
.GetActualFontNameForTesting());
41 EXPECT_EQ(Font::BOLD
, derived_font
.GetStyle());
45 TEST(PlatformFontWinTest
, DeriveFontWithHeight_Consistency
) {
46 gfx::Font
arial_12("Arial", 12);
47 ASSERT_GT(16, arial_12
.GetHeight());
48 gfx::Font derived_1
= static_cast<PlatformFontWin
*>(
49 arial_12
.platform_font())->DeriveFontWithHeight(16, 0);
51 gfx::Font
arial_15("Arial", 15);
52 ASSERT_LT(16, arial_15
.GetHeight());
53 gfx::Font derived_2
= static_cast<PlatformFontWin
*>(
54 arial_15
.platform_font())->DeriveFontWithHeight(16, 0);
56 EXPECT_EQ(derived_1
.GetFontSize(), derived_2
.GetFontSize());
57 EXPECT_EQ(16, derived_1
.GetHeight());
58 EXPECT_EQ(16, derived_2
.GetHeight());
61 // Callback function used by DeriveFontWithHeight_MinSize() below.
62 static int GetMinFontSize() {
66 TEST(PlatformFontWinTest
, DeriveFontWithHeight_MinSize
) {
67 PlatformFontWin::GetMinimumFontSizeCallback old_callback
=
68 PlatformFontWin::get_minimum_font_size_callback
;
69 PlatformFontWin::get_minimum_font_size_callback
= &GetMinFontSize
;
72 const Font
min_font(base_font
.GetFontName(), GetMinFontSize());
73 PlatformFontWin
* platform_font
=
74 static_cast<PlatformFontWin
*>(base_font
.platform_font());
76 const Font derived_font
=
77 platform_font
->DeriveFontWithHeight(min_font
.GetHeight() - 1, 0);
78 EXPECT_EQ(min_font
.GetFontSize(), derived_font
.GetFontSize());
79 EXPECT_EQ(min_font
.GetHeight(), derived_font
.GetHeight());
81 PlatformFontWin::get_minimum_font_size_callback
= old_callback
;
84 TEST(PlatformFontWinTest
, DeriveFontWithHeight_TooSmall
) {
86 PlatformFontWin
* platform_font
=
87 static_cast<PlatformFontWin
*>(base_font
.platform_font());
89 const Font derived_font
= platform_font
->DeriveFontWithHeight(1, 0);
90 EXPECT_GT(derived_font
.GetHeight(), 1);
93 // Test whether font metrics retrieved by DirectWrite (skia) and GDI match as
94 // per assumptions mentioned below:-
95 // 1. Font size is the same
96 // 2. The difference between GDI and DirectWrite for font height, baseline,
97 // and cap height is at most 1. For smaller font sizes under 12, GDI
98 // font heights/baselines/cap height are equal/larger by 1 point. For larger
99 // font sizes DirectWrite font heights/baselines/cap height are equal/larger
101 TEST(PlatformFontWinTest
, Metrics_SkiaVersusGDI
) {
102 if (!gfx::win::IsDirectWriteEnabled())
105 // Describes the font being tested.
107 base::string16 font_name
;
112 {base::ASCIIToUTF16("Arial"), 6},
113 {base::ASCIIToUTF16("Arial"), 8},
114 {base::ASCIIToUTF16("Arial"), 10},
115 {base::ASCIIToUTF16("Arial"), 12},
116 {base::ASCIIToUTF16("Arial"), 16},
117 {base::ASCIIToUTF16("Symbol"), 6},
118 {base::ASCIIToUTF16("Symbol"), 10},
119 {base::ASCIIToUTF16("Symbol"), 12},
120 {base::ASCIIToUTF16("Tahoma"), 10},
121 {base::ASCIIToUTF16("Tahoma"), 16},
122 {base::ASCIIToUTF16("Segoe UI"), 6},
123 {base::ASCIIToUTF16("Segoe UI"), 8},
124 {base::ASCIIToUTF16("Segoe UI"), 20},
127 base::win::ScopedGetDC
screen_dc(NULL
);
128 gfx::ScopedSetMapMode
mode(screen_dc
, MM_TEXT
);
130 for (int i
= 0; i
< arraysize(fonts
); ++i
) {
131 LOGFONT font_info
= {0};
133 font_info
.lfHeight
= -fonts
[i
].font_size
;
134 font_info
.lfWeight
= FW_NORMAL
;
135 wcscpy_s(font_info
.lfFaceName
,
136 fonts
[i
].font_name
.length() + 1,
137 fonts
[i
].font_name
.c_str());
139 HFONT font
= CreateFontIndirect(&font_info
);
141 TEXTMETRIC font_metrics
;
142 PlatformFontWin::GetTextMetricsForFont(screen_dc
, font
, &font_metrics
);
144 scoped_refptr
<PlatformFontWin::HFontRef
> h_font_gdi(
145 PlatformFontWin::CreateHFontRefFromGDI(font
, font_metrics
));
147 scoped_refptr
<PlatformFontWin::HFontRef
> h_font_skia(
148 PlatformFontWin::CreateHFontRefFromSkia(font
, font_metrics
));
150 EXPECT_EQ(h_font_gdi
->font_size(), h_font_skia
->font_size());
151 EXPECT_EQ(h_font_gdi
->style(), h_font_skia
->style());
152 EXPECT_EQ(h_font_gdi
->font_name(), h_font_skia
->font_name());
153 EXPECT_EQ(h_font_gdi
->ave_char_width(), h_font_skia
->ave_char_width());
155 EXPECT_LE(abs(h_font_gdi
->cap_height() - h_font_skia
->cap_height()), 1);
156 EXPECT_LE(abs(h_font_gdi
->baseline() - h_font_skia
->baseline()), 1);
157 EXPECT_LE(abs(h_font_gdi
->height() - h_font_skia
->height()), 1);
161 // Test if DirectWrite font fallback works correctly, i.e. whether DirectWrite
162 // fonts handle the font names in the
163 // HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes key
164 // correctly. The expectation is that the actual font created should be the
165 // one specified by the value for the substituted font. For e.g. MS Shell Dlg
166 // should create Microsoft Sans Serif, etc.
167 // For random fonts which are not substitutes, DirectWrite should fallback
168 // to Arial on a properly configured machine.
169 TEST(PlatformFontWinTest
, DirectWriteFontSubstitution
) {
170 if (!gfx::win::IsDirectWriteEnabled())
173 // Describes the font being tested.
175 base::string16 font_name
;
176 std::string expected_font_name
;
180 {base::ASCIIToUTF16("MS Shell Dlg"), "Microsoft Sans Serif"},
181 {base::ASCIIToUTF16("MS Shell Dlg 2"), "Tahoma"},
182 {base::ASCIIToUTF16("FooBar"), "Arial"},
185 base::win::ScopedGetDC
screen_dc(NULL
);
186 gfx::ScopedSetMapMode
mode(screen_dc
, MM_TEXT
);
188 for (int i
= 0; i
< arraysize(fonts
); ++i
) {
189 LOGFONT font_info
= {0};
191 font_info
.lfHeight
= -10;
192 font_info
.lfWeight
= FW_NORMAL
;
193 wcscpy_s(font_info
.lfFaceName
,
194 fonts
[i
].font_name
.length() + 1,
195 fonts
[i
].font_name
.c_str());
197 HFONT font
= CreateFontIndirect(&font_info
);
199 TEXTMETRIC font_metrics
;
200 PlatformFontWin::GetTextMetricsForFont(screen_dc
, font
, &font_metrics
);
202 scoped_refptr
<PlatformFontWin::HFontRef
> h_font_skia(
203 PlatformFontWin::CreateHFontRefFromSkia(font
, font_metrics
));
205 EXPECT_EQ(fonts
[i
].expected_font_name
, h_font_skia
->font_name());