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Bug Report T153353
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The space occupied by cached images loaded by an image tile layer can exceed the limit specified by the layer's Provider.CacheOptions.DiskLimit property

created 11 years ago (modified 11 years ago)

Hello,

when using Disk cache for Image Tiles, and the cache folder already has items, TdxMapControlDiskCacheMap.Create does load all existing items by calling LoadItems but does not initialize it's FSize member.

==> the map always reports a Size which is lower than the real total size of cached tiles.
It can even report a negative size if many tiles are deleted because of the age limit.

My patch : (unit dxMapControlDiskCache.pas)

a) In the  TdxMapControlDiskCacheMap.Create constructor :
   add "FSize := 0;" before potentially loading items

b) In procedure TdxMapControlDiskCacheMap.LoadItems :
   add a cache iItem variable : "AItem: TdxMapControlCacheMapItem"
   add "Inc(FSize, AItem.Size);" logic in the loading loop

Comments (2)
DevExpress Support Team 11 years ago

    Hello Eric,

    Thank you for your valuable research. It seems that you are right. I have forwarded this ticket to our developers for fixing the issue.

    EF EF
    ERIC FERLEY 11 years ago

      Hi Paulo, you're welcome.
      I have other questions about disk cache for MapControl but I'll open another ticket for that.
      Eric

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      Answers approved by DevExpress Support

      created 11 years ago (modified 11 years ago)

      We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.

      Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.

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