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30 #include "FontFallbackList.h"
33 #include "FontCache.h"
34 #include "SegmentedFontData.h"
38 FontFallbackList::FontFallbackList()
40 , m_cachedPrimarySimpleFontData(0)
42 , m_fontSelectorVersion(0)
44 , m_generation(fontCache()->generation())
45 , m_pitch(UnknownPitch)
46 , m_loadingCustomFonts(false)
50 void FontFallbackList::invalidate(PassRefPtr<FontSelector> fontSelector)
56 m_cachedPrimarySimpleFontData = 0;
58 m_pitch = UnknownPitch;
59 m_loadingCustomFonts = false;
60 m_fontSelector = fontSelector;
61 m_fontSelectorVersion = m_fontSelector ? m_fontSelector->version() : 0;
62 m_generation = fontCache()->generation();
65 void FontFallbackList::releaseFontData()
67 unsigned numFonts = m_fontList.size();
68 for (unsigned i = 0; i < numFonts; ++i) {
69 if (!m_fontList[i].second) {
70 ASSERT(!m_fontList[i].first->isSegmented());
71 fontCache()->releaseFontData(static_cast<const SimpleFontData*>(m_fontList[i].first));
76 void FontFallbackList::determinePitch(const Font* font) const
78 const FontData* fontData = primaryFontData(font);
79 if (!fontData->isSegmented())
80 m_pitch = static_cast<const SimpleFontData*>(fontData)->pitch();
82 const SegmentedFontData* segmentedFontData = static_cast<const SegmentedFontData*>(fontData);
83 unsigned numRanges = segmentedFontData->numRanges();
85 m_pitch = segmentedFontData->rangeAt(0).fontData()->pitch();
87 m_pitch = VariablePitch;
91 const FontData* FontFallbackList::fontDataAt(const Font* font, unsigned realizedFontIndex) const
93 if (realizedFontIndex < m_fontList.size())
94 return m_fontList[realizedFontIndex].first; // This fallback font is already in our list.
96 // Make sure we're not passing in some crazy value here.
97 ASSERT(realizedFontIndex == m_fontList.size());
98 if (m_familyIndex == cAllFamiliesScanned)
101 // Ask the font cache for the font data.
102 // We are obtaining this font for the first time. We keep track of the families we've looked at before
103 // in |m_familyIndex|, so that we never scan the same spot in the list twice. getFontData will adjust our
104 // |m_familyIndex| as it scans for the right font to make.
105 ASSERT(fontCache()->generation() == m_generation);
106 const FontData* result = fontCache()->getFontData(*font, m_familyIndex, m_fontSelector.get());
108 if (m_fontList.find(pair<const FontData*, bool>(result, result->isCustomFont())) == -1)
109 m_fontList.append(pair<const FontData*, bool>(result, result->isCustomFont()));
110 if (result->isLoading())
111 m_loadingCustomFonts = true;
116 void FontFallbackList::setPlatformFont(const FontPlatformData& platformData)
118 m_familyIndex = cAllFamiliesScanned;
119 ASSERT(fontCache()->generation() == m_generation);
120 const FontData* fontData = fontCache()->getCachedFontData(&platformData);
121 m_fontList.append(pair<const FontData*, bool>(fontData, fontData->isCustomFont()));