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30 #include "FontFallbackList.h"
33 #include "FontCache.h"
34 #include "SegmentedFontData.h"
38 FontFallbackList::FontFallbackList()
40 , m_cachedPrimarySimpleFontData(0)
43 , m_pitch(UnknownPitch)
44 , m_loadingCustomFonts(false)
45 , m_generation(fontCache()->generation())
49 void FontFallbackList::invalidate(PassRefPtr<FontSelector> fontSelector)
55 m_cachedPrimarySimpleFontData = 0;
57 m_pitch = UnknownPitch;
58 m_loadingCustomFonts = false;
59 m_fontSelector = fontSelector;
60 m_generation = fontCache()->generation();
63 void FontFallbackList::releaseFontData()
65 unsigned numFonts = m_fontList.size();
66 for (unsigned i = 0; i < numFonts; ++i) {
67 if (!m_fontList[i].second) {
68 ASSERT(!m_fontList[i].first->isSegmented());
69 fontCache()->releaseFontData(static_cast<const SimpleFontData*>(m_fontList[i].first));
74 void FontFallbackList::determinePitch(const Font* font) const
76 const FontData* fontData = primaryFontData(font);
77 if (!fontData->isSegmented())
78 m_pitch = static_cast<const SimpleFontData*>(fontData)->pitch();
80 const SegmentedFontData* segmentedFontData = static_cast<const SegmentedFontData*>(fontData);
81 unsigned numRanges = segmentedFontData->numRanges();
83 m_pitch = segmentedFontData->rangeAt(0).fontData()->pitch();
85 m_pitch = VariablePitch;
89 const FontData* FontFallbackList::fontDataAt(const Font* font, unsigned realizedFontIndex) const
91 if (realizedFontIndex < m_fontList.size())
92 return m_fontList[realizedFontIndex].first; // This fallback font is already in our list.
94 // Make sure we're not passing in some crazy value here.
95 ASSERT(realizedFontIndex == m_fontList.size());
97 if (m_familyIndex == cAllFamiliesScanned)
100 // Ask the font cache for the font data.
101 // We are obtaining this font for the first time. We keep track of the families we've looked at before
102 // in |m_familyIndex|, so that we never scan the same spot in the list twice. getFontData will adjust our
103 // |m_familyIndex| as it scans for the right font to make.
104 ASSERT(fontCache()->generation() == m_generation);
105 const FontData* result = fontCache()->getFontData(*font, m_familyIndex, m_fontSelector.get());
107 m_fontList.append(pair<const FontData*, bool>(result, result->isCustomFont()));
108 if (result->isLoading())
109 m_loadingCustomFonts = true;
114 void FontFallbackList::setPlatformFont(const FontPlatformData& platformData)
116 m_familyIndex = cAllFamiliesScanned;
117 ASSERT(fontCache()->generation() == m_generation);
118 const FontData* fontData = fontCache()->getCachedFontData(&platformData);
119 m_fontList.append(pair<const FontData*, bool>(fontData, fontData->isCustomFont()));