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Reference count glyphs in QSGDistanceFieldGlyphCache.
This was previously done only in the default cache implementation. It has been moved to the base class. releaseGlyphs() is called when a glyph is not referenced anymore by any node. Added a virtual function referenceGlyphs() that is called everytime glyphs are being used in a node. This function is called just before requestGlyphs(). Change-Id: If90f86c328c18ae2a5977847a6adf50b99ea1241 Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>
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Yoann Lopes
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Qt by Nokia
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Dec 21, 2011
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