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39
40#include "qfontenginemultifontconfig_p.h"
41
42#include <QtGui/private/qfontengine_ft_p.h>
43
44QT_BEGIN_NAMESPACE
45
46QFontEngineMultiFontConfig::QFontEngineMultiFontConfig(QFontEngine *fe, int script)
47 : QFontEngineMulti(fe, script)
48{
49}
50
51QFontEngineMultiFontConfig::~QFontEngineMultiFontConfig()
52{
53 for (FcPattern *pattern : qAsConst(cachedMatchPatterns)) {
54 if (pattern)
55 FcPatternDestroy(pattern);
56 }
57}
58
59bool QFontEngineMultiFontConfig::shouldLoadFontEngineForCharacter(int at, uint ucs4) const
60{
61 bool charSetHasChar = true;
62 FcPattern *matchPattern = getMatchPatternForFallback(at - 1);
63 if (matchPattern != nullptr) {
64 FcCharSet *charSet;
65 FcPatternGetCharSet(matchPattern, FC_CHARSET, 0, &charSet);
66 charSetHasChar = FcCharSetHasChar(charSet, ucs4);
67 }
68
69 return charSetHasChar;
70}
71
72
73FcPattern * QFontEngineMultiFontConfig::getMatchPatternForFallback(int fallBackIndex) const
74{
75 Q_ASSERT(fallBackIndex < fallbackFamilyCount());
76 if (fallbackFamilyCount() > cachedMatchPatterns.size())
77 cachedMatchPatterns.resize(fallbackFamilyCount());
78 FcPattern *ret = cachedMatchPatterns.at(fallBackIndex);
79 if (ret)
80 return ret;
81 FcPattern *requestPattern = FcPatternCreate();
82 FcValue value;
83 value.type = FcTypeString;
84 QByteArray cs = fallbackFamilyAt(fallBackIndex).toUtf8();
85 value.u.s = reinterpret_cast<const FcChar8 *>(cs.data());
86 FcPatternAdd(requestPattern, FC_FAMILY, value, true);
87 FcResult result;
88 ret = FcFontMatch(nullptr, requestPattern, &result);
89 cachedMatchPatterns.insert(fallBackIndex, ret);
90 FcPatternDestroy(requestPattern);
91 return ret;
92}
93
94QT_END_NAMESPACE
95