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1 /* | 1 /* |
2 * Copyright (C) 2013 Google, Inc. | 2 * Copyright (C) 2013 Google, Inc. |
3 * | 3 * |
4 * This library is free software; you can redistribute it and/or | 4 * This library is free software; you can redistribute it and/or |
5 * modify it under the terms of the GNU Library General Public | 5 * modify it under the terms of the GNU Library General Public |
6 * License as published by the Free Software Foundation; either | 6 * License as published by the Free Software Foundation; either |
7 * version 2 of the License, or (at your option) any later version. | 7 * version 2 of the License, or (at your option) any later version. |
8 * | 8 * |
9 * This library is distributed in the hope that it will be useful, | 9 * This library is distributed in the hope that it will be useful, |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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30 namespace WebCore { | 30 namespace WebCore { |
31 | 31 |
32 class CSSFontFaceSource; | 32 class CSSFontFaceSource; |
33 struct GlyphData; | 33 struct GlyphData; |
34 class GlyphPage; | 34 class GlyphPage; |
35 class SimpleFontData; | 35 class SimpleFontData; |
36 struct WidthIterator; | 36 struct WidthIterator; |
37 | 37 |
38 class PLATFORM_EXPORT CustomFontData : public RefCounted<CustomFontData> { | 38 class PLATFORM_EXPORT CustomFontData : public RefCounted<CustomFontData> { |
39 public: | 39 public: |
40 static PassRefPtr<CustomFontData> create(bool isLoadingFallback = false) | 40 enum FallbackVisibility { InvisibleFallback, VisibleFallback }; |
| 41 static PassRefPtr<CustomFontData> create(bool isLoadingFallback = false, Fal
lbackVisibility visibility = VisibleFallback) |
41 { | 42 { |
42 return adoptRef(new CustomFontData(isLoadingFallback)); | 43 return adoptRef(new CustomFontData(isLoadingFallback, visibility)); |
43 } | 44 } |
44 | 45 |
45 virtual ~CustomFontData() { } | 46 virtual ~CustomFontData() { } |
46 | 47 |
47 virtual void beginLoadIfNeeded() const { }; | 48 virtual void beginLoadIfNeeded() const { }; |
48 bool isLoading() const { return m_isLoadingFallback && m_isUsed; } | 49 bool isLoading() const { return m_isLoadingFallback && m_isUsed; } |
49 bool isLoadingFallback() const { return m_isLoadingFallback; } | 50 bool isLoadingFallback() const { return m_isLoadingFallback; } |
| 51 bool shouldSkipDrawing() const { return m_fallbackVisibility == InvisibleFal
lback && m_isUsed; } |
50 | 52 |
51 virtual bool isSVGFont() const { return false; } | 53 virtual bool isSVGFont() const { return false; } |
52 virtual void initializeFontData(SimpleFontData*, float) { } | 54 virtual void initializeFontData(SimpleFontData*, float) { } |
53 virtual float widthForSVGGlyph(Glyph, float) const { return 0.0f; } | 55 virtual float widthForSVGGlyph(Glyph, float) const { return 0.0f; } |
54 virtual bool fillSVGGlyphPage(GlyphPage*, unsigned, unsigned, UChar*, unsign
ed, const SimpleFontData*) const { return false; } | 56 virtual bool fillSVGGlyphPage(GlyphPage*, unsigned, unsigned, UChar*, unsign
ed, const SimpleFontData*) const { return false; } |
55 virtual bool applySVGGlyphSelection(WidthIterator&, GlyphData&, bool, int, u
nsigned&) const { return false; } | 57 virtual bool applySVGGlyphSelection(WidthIterator&, GlyphData&, bool, int, u
nsigned&) const { return false; } |
56 | 58 |
57 virtual void setCSSFontFaceSource(CSSFontFaceSource* source) { ASSERT_NOT_RE
ACHED(); } | 59 virtual void setCSSFontFaceSource(CSSFontFaceSource* source) { ASSERT_NOT_RE
ACHED(); } |
58 virtual void clearCSSFontFaceSource() { } | 60 virtual void clearCSSFontFaceSource() { } |
59 | 61 |
60 protected: | 62 protected: |
61 CustomFontData(bool isLoadingFallback) | 63 CustomFontData(bool isLoadingFallback, FallbackVisibility visibility = Visib
leFallback) |
62 : m_isLoadingFallback(isLoadingFallback) | 64 : m_isLoadingFallback(isLoadingFallback) |
| 65 , m_fallbackVisibility(visibility) |
63 , m_isUsed(false) | 66 , m_isUsed(false) |
64 { | 67 { |
65 } | 68 } |
66 | 69 |
67 bool m_isLoadingFallback; // Whether or not this is a temporary font data fo
r a custom font which is not yet loaded. | 70 bool m_isLoadingFallback; |
| 71 FallbackVisibility m_fallbackVisibility; |
68 mutable bool m_isUsed; | 72 mutable bool m_isUsed; |
69 }; | 73 }; |
70 | 74 |
71 } | 75 } |
72 | 76 |
73 #endif // CustomFontData_h | 77 #endif // CustomFontData_h |
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