Change #shrinkTo: on FreeTypeCache to selectively remove entries rather than all of them #16419
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…on semaphore for the cache instead of one per font.
…: and #reportCacheState on FreeTypeCache wait for the semaphore.
…ype: on FreeTypeCache.
…eeTypeCache remove emptied dictionaries from the ‘fontTable’ (so that fonts for which there are no more entries also get removed).
…her than all of them.
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This pull request changes
#shrinkTo:on FreeTypeCache to selectively remove entries rather than all of them. This avoids some of the ‘stuttering’ that occurs when repeatedly scrolling pages in the Documentation Browser all the way down and back up with the world canvas scale factor set to 2 due to all entries being removed from the cache and many glyphs then having to be readded all at once.