src/quick/scenegraph/qsgshareddistancefieldglyphcache_p.h

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  41
  42 #ifndef QSGSHAREDDISTANCEFIELDGLYPHCACHE_H
  43 #define QSGSHAREDDISTANCEFIELDGLYPHCACHE_H
  44
  45 #include <QtCore/qwaitcondition.h>
  46 #include <private/qsgadaptationlayer_p.h>
  47
  48 QT_BEGIN_HEADER
  49
  50 QT_BEGIN_NAMESPACE
  51
  52 class QPlatformSharedGraphicsCache;
  53 class QSGSharedDistanceFieldGlyphCache : public QObject, public QSGDistanceFieldGlyphCache
  54 {
  55     Q_OBJECT
  56 public:
  57     explicit QSGSharedDistanceFieldGlyphCache(const QByteArray &cacheId,
  58                                               QPlatformSharedGraphicsCache *sharedGraphicsCache,
  59                                               QSGDistanceFieldGlyphCacheManager *man,
  60                                               QOpenGLContext *c,
  61                                               const QRawFont &font);
  62     ~QSGSharedDistanceFieldGlyphCache();
  63
  64     void registerOwnerElement(QQuickItem *ownerElement);
  65     void unregisterOwnerElement(QQuickItem *ownerElement);
  66     void processPendingGlyphs();
  67
  68     void requestGlyphs(const QSet<glyph_t> &glyphs);
  69     void referenceGlyphs(const QSet<glyph_t> &glyphs);
  70     void storeGlyphs(const QHash<glyph_t, QImage> &glyphs);
  71     void releaseGlyphs(const QSet<glyph_t> &glyphs);
  72
  73 Q_SIGNALS:
  74     void glyphsPending();
  75
  76 private Q_SLOTS:
  77     void reportItemsMissing(const QByteArray &cacheId, const QVector<quint32> &itemIds);
  78     void reportItemsAvailable(const QByteArray &cacheId,
  79                           void *bufferId, const QSize &bufferSize,
  80                           const QVector<quint32> &itemIds, const QVector<QPoint> &positions);
  81     void reportItemsInvalidated(const QByteArray &cacheId, const QVector<quint32> &itemIds);
  82
  83 private:
  84     void waitForGlyphs();
  85     void saveTexture(GLuint textureId, int width, int height);
  86
  87     QSet<quint32> m_requestedGlyphsThatHaveNotBeenReturned;
  88     QWaitCondition m_pendingGlyphsCondition;
  89     QByteArray m_cacheId;
  90     QPlatformSharedGraphicsCache *m_sharedGraphicsCache;
  91     QMutex m_pendingGlyphsMutex;
  92
  93     QSet<glyph_t> m_pendingInvalidatedGlyphs;
  94     QSet<glyph_t> m_pendingMissingGlyphs;
  95
  96     struct PendingGlyph
  97     {
  98         PendingGlyph() : buffer(0) {}
  99
 100         void *buffer;
 101         QSize bufferSize;
 102         QPoint position;
 103     };
 104
 105     QHash<quint32, PendingGlyph> m_pendingReadyGlyphs;
 106     QHash<glyph_t, void *> m_bufferForGlyph;
 107 };
 108
 109 QT_END_NAMESPACE
 110
 111 QT_END_HEADER
 112
 113 #endif // QSGSHAREDDISTANCEFIELDGLYPHCACHE_H