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Side by Side Diff: gfx/platform_font_gtk.h

Issue 6246027: Move src/gfx/ to src/ui/gfx... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 10 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 GFX_PLATFORM_FONT_GTK_ 5 #ifndef GFX_PLATFORM_FONT_GTK_
6 #define GFX_PLATFORM_FONT_GTK_ 6 #define GFX_PLATFORM_FONT_GTK_
7 #pragma once 7 #pragma once
8 8
9 #include "base/scoped_ptr.h" 9 #include "ui/gfx/platform_font_gtk.h"
10 #include "gfx/platform_font.h" 10 // TODO(sail): remove this file once all includes have been updated.
11 #include "third_party/skia/include/core/SkRefCnt.h"
12
13 class SkTypeface;
14 class SkPaint;
15
16 namespace gfx {
17
18 class PlatformFontGtk : public PlatformFont {
19 public:
20 PlatformFontGtk();
21 explicit PlatformFontGtk(const Font& other);
22 explicit PlatformFontGtk(NativeFont native_font);
23 PlatformFontGtk(const string16& font_name,
24 int font_size);
25
26 // Converts |gfx_font| to a new pango font. Free the returned font with
27 // pango_font_description_free().
28 static PangoFontDescription* PangoFontFromGfxFont(const gfx::Font& gfx_font);
29
30 // Position as an offset from the height of the drawn text, used to draw
31 // an underline. This is a negative number, so the underline would be
32 // drawn at y + height + underline_position;
33 double underline_position() const;
34 // The thickness to draw the underline.
35 double underline_thickness() const;
36
37 // Overridden from PlatformFont:
38 virtual Font DeriveFont(int size_delta, int style) const;
39 virtual int GetHeight() const;
40 virtual int GetBaseline() const;
41 virtual int GetAverageCharacterWidth() const;
42 virtual int GetStringWidth(const string16& text) const;
43 virtual int GetExpectedTextWidth(int length) const;
44 virtual int GetStyle() const;
45 virtual string16 GetFontName() const;
46 virtual int GetFontSize() const;
47 virtual NativeFont GetNativeFont() const;
48
49 private:
50 // Create a new instance of this object with the specified properties. Called
51 // from DeriveFont.
52 PlatformFontGtk(SkTypeface* typeface,
53 const string16& name,
54 int size,
55 int style);
56 virtual ~PlatformFontGtk();
57
58 // Initialize this object.
59 void InitWithNameAndSize(const string16& font_name, int font_size);
60 void InitWithTypefaceNameSizeAndStyle(SkTypeface* typeface,
61 const string16& name,
62 int size,
63 int style);
64 void InitFromPlatformFont(const PlatformFontGtk* other);
65
66 // Potentially slow call to get pango metrics (average width, underline info).
67 void InitPangoMetrics();
68
69 // Setup a Skia context to use the current typeface
70 void PaintSetup(SkPaint* paint) const;
71
72 // Make |this| a copy of |other|.
73 void CopyFont(const Font& other);
74
75 // The average width of a character, initialized and cached if needed.
76 double GetAverageWidth() const;
77
78 // These two both point to the same SkTypeface. We use the SkAutoUnref to
79 // handle the reference counting, but without @typeface_ we would have to
80 // cast the SkRefCnt from @typeface_helper_ every time.
81 scoped_ptr<SkAutoUnref> typeface_helper_;
82 SkTypeface *typeface_;
83
84 // Additional information about the face
85 // Skia actually expects a family name and not a font name.
86 string16 font_family_;
87 int font_size_pixels_;
88 int style_;
89
90 // Cached metrics, generated at construction
91 int height_pixels_;
92 int ascent_pixels_;
93
94 // The pango metrics are much more expensive so we wait until we need them
95 // to compute them.
96 bool pango_metrics_inited_;
97 double average_width_pixels_;
98 double underline_position_pixels_;
99 double underline_thickness_pixels_;
100
101 // The default font, used for the default constructor.
102 static Font* default_font_;
103 };
104
105 } // namespace gfx
106 11
107 #endif // GFX_PLATFORM_FONT_GTK_ 12 #endif // GFX_PLATFORM_FONT_GTK_
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