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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef UI_GFX_PLATFORM_FONT_WIN_H_ | 5 #ifndef UI_GFX_PLATFORM_FONT_WIN_H_ |
6 #define UI_GFX_PLATFORM_FONT_WIN_H_ | 6 #define UI_GFX_PLATFORM_FONT_WIN_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/compiler_specific.h" | 10 #include "base/compiler_specific.h" |
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43 // performed other than clamping to a minimum font height if | 43 // performed other than clamping to a minimum font height if |
44 // |get_minimum_font_size_callback| is specified. | 44 // |get_minimum_font_size_callback| is specified. |
45 typedef void (*AdjustFontCallback)(LOGFONT* lf); | 45 typedef void (*AdjustFontCallback)(LOGFONT* lf); |
46 static AdjustFontCallback adjust_font_callback; | 46 static AdjustFontCallback adjust_font_callback; |
47 | 47 |
48 // Returns the font name for the system locale. Some fonts, particularly | 48 // Returns the font name for the system locale. Some fonts, particularly |
49 // East Asian fonts, have different names per locale. If the localized font | 49 // East Asian fonts, have different names per locale. If the localized font |
50 // name could not be retrieved, returns GetFontName(). | 50 // name could not be retrieved, returns GetFontName(). |
51 std::string GetLocalizedFontName() const; | 51 std::string GetLocalizedFontName() const; |
52 | 52 |
53 // Returns a derived Font with the specified |style| and maximum |height|. | |
54 // The returned Font will be the largest font size with a height <= |height|, | |
55 // since a size with the exact specified |height| may not necessarily exist. | |
56 // GetMinimumFontSize() may impose a font size that is taller than |height|. | |
57 Font DeriveFontWithHeight(int height, int style); | |
58 | |
59 // Overridden from PlatformFont: | 53 // Overridden from PlatformFont: |
60 Font DeriveFont(int size_delta, int style) const override; | 54 Font DeriveFont(int size_delta, |
| 55 int style, |
| 56 gfx::Font::Weight weight) const override; |
61 int GetHeight() override; | 57 int GetHeight() override; |
| 58 gfx::Font::Weight GetWeight() const override; |
62 int GetBaseline() override; | 59 int GetBaseline() override; |
63 int GetCapHeight() override; | 60 int GetCapHeight() override; |
64 int GetExpectedTextWidth(int length) override; | 61 int GetExpectedTextWidth(int length) override; |
65 int GetStyle() const override; | 62 int GetStyle() const override; |
66 const std::string& GetFontName() const override; | 63 const std::string& GetFontName() const override; |
67 std::string GetActualFontNameForTesting() const override; | 64 std::string GetActualFontNameForTesting() const override; |
68 int GetFontSize() const override; | 65 int GetFontSize() const override; |
69 const FontRenderParams& GetFontRenderParams() override; | 66 const FontRenderParams& GetFontRenderParams() override; |
70 NativeFont GetNativeFont() const override; | 67 NativeFont GetNativeFont() const override; |
71 | 68 |
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99 class GFX_EXPORT HFontRef : public base::RefCounted<HFontRef> { | 96 class GFX_EXPORT HFontRef : public base::RefCounted<HFontRef> { |
100 public: | 97 public: |
101 // This constructor takes control of the HFONT, and will delete it when | 98 // This constructor takes control of the HFONT, and will delete it when |
102 // the HFontRef is deleted. | 99 // the HFontRef is deleted. |
103 HFontRef(HFONT hfont, | 100 HFontRef(HFONT hfont, |
104 int font_size, | 101 int font_size, |
105 int height, | 102 int height, |
106 int baseline, | 103 int baseline, |
107 int cap_height, | 104 int cap_height, |
108 int ave_char_width, | 105 int ave_char_width, |
| 106 gfx::Font::Weight weight, |
109 int style); | 107 int style); |
110 | 108 |
111 // Accessors | 109 // Accessors |
112 HFONT hfont() const { return hfont_; } | 110 HFONT hfont() const { return hfont_; } |
113 int height() const { return height_; } | 111 int height() const { return height_; } |
114 int baseline() const { return baseline_; } | 112 int baseline() const { return baseline_; } |
115 int cap_height() const { return cap_height_; } | 113 int cap_height() const { return cap_height_; } |
116 int ave_char_width() const { return ave_char_width_; } | 114 int ave_char_width() const { return ave_char_width_; } |
| 115 gfx::Font::Weight weight() const { return weight_; } |
117 int style() const { return style_; } | 116 int style() const { return style_; } |
118 const std::string& font_name() const { return font_name_; } | 117 const std::string& font_name() const { return font_name_; } |
119 int font_size() const { return font_size_; } | 118 int font_size() const { return font_size_; } |
120 int requested_font_size() const { return requested_font_size_; } | 119 int requested_font_size() const { return requested_font_size_; } |
121 | 120 |
122 // Returns the average character width in dialog units. | 121 // Returns the average character width in dialog units. |
123 int GetDluBaseX(); | 122 int GetDluBaseX(); |
124 | 123 |
125 // Helper to return the average character width using the text extent | 124 // Helper to return the average character width using the text extent |
126 // technique mentioned here. http://support.microsoft.com/kb/125681. | 125 // technique mentioned here. http://support.microsoft.com/kb/125681. |
127 static int GetAverageCharWidthInDialogUnits(HFONT gdi_font); | 126 static int GetAverageCharWidthInDialogUnits(HFONT gdi_font); |
128 | 127 |
129 private: | 128 private: |
130 friend class base::RefCounted<HFontRef>; | 129 friend class base::RefCounted<HFontRef>; |
131 FRIEND_TEST_ALL_PREFIXES(RenderTextTest, HarfBuzz_UniscribeFallback); | 130 FRIEND_TEST_ALL_PREFIXES(RenderTextTest, HarfBuzz_UniscribeFallback); |
132 FRIEND_TEST_ALL_PREFIXES(PlatformFontWinTest, Metrics_SkiaVersusGDI); | 131 FRIEND_TEST_ALL_PREFIXES(PlatformFontWinTest, Metrics_SkiaVersusGDI); |
133 FRIEND_TEST_ALL_PREFIXES(PlatformFontWinTest, DirectWriteFontSubstitution); | 132 FRIEND_TEST_ALL_PREFIXES(PlatformFontWinTest, DirectWriteFontSubstitution); |
134 | 133 |
135 ~HFontRef(); | 134 ~HFontRef(); |
136 | 135 |
137 const HFONT hfont_; | 136 const HFONT hfont_; |
138 const int font_size_; | 137 const int font_size_; |
139 const int height_; | 138 const int height_; |
140 const int baseline_; | 139 const int baseline_; |
141 const int cap_height_; | 140 const int cap_height_; |
142 const int ave_char_width_; | 141 const int ave_char_width_; |
| 142 const gfx::Font::Weight weight_; |
143 const int style_; | 143 const int style_; |
144 // Average character width in dialog units. This is queried lazily from the | 144 // Average character width in dialog units. This is queried lazily from the |
145 // system, with an initial value of -1 meaning it hasn't yet been queried. | 145 // system, with an initial value of -1 meaning it hasn't yet been queried. |
146 int dlu_base_x_; | 146 int dlu_base_x_; |
147 std::string font_name_; | 147 std::string font_name_; |
148 | 148 |
149 // If the requested font size is not possible for the font, |font_size_| | 149 // If the requested font size is not possible for the font, |font_size_| |
150 // will be different than |requested_font_size_|. This is stored separately | 150 // will be different than |requested_font_size_|. This is stored separately |
151 // so that code that increases the font size in a loop will not cause the | 151 // so that code that increases the font size in a loop will not cause the |
152 // loop to get stuck on the same size. | 152 // loop to get stuck on the same size. |
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200 | 200 |
201 // Pointer to the global IDWriteFactory interface. | 201 // Pointer to the global IDWriteFactory interface. |
202 static IDWriteFactory* direct_write_factory_; | 202 static IDWriteFactory* direct_write_factory_; |
203 | 203 |
204 DISALLOW_COPY_AND_ASSIGN(PlatformFontWin); | 204 DISALLOW_COPY_AND_ASSIGN(PlatformFontWin); |
205 }; | 205 }; |
206 | 206 |
207 } // namespace gfx | 207 } // namespace gfx |
208 | 208 |
209 #endif // UI_GFX_PLATFORM_FONT_WIN_H_ | 209 #endif // UI_GFX_PLATFORM_FONT_WIN_H_ |
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