[jira] [Issue Comment Deleted] (PDFBOX-4411) Support caching of ICC based color spaces

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-4411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr updated PDFBOX-4411:
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    Comment: was deleted

(was: Sorry, I see I missed this one. May have been at the time I was concentrated on the structure tree stuff. I've now marked it so I don't forget.)

> Support caching of ICC based color spaces
> -----------------------------------------
>
>                 Key: PDFBOX-4411
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4411
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Rendering
>    Affects Versions: 2.0.13
>            Reporter: Itai Shaked
>            Priority: Major
>         Attachments: Cache_PDICCBased_color_spaces.patch
>
>
> Following up on PDFBOX-4392 I have noticed ICC color spaces aren't being cached in the resource cache, since they are represented not by a `COSObject` but rather by a `COSArray` with `COSName` of `ICCBased` as the first element and a `COSObject` (the actual profile) as the second element.  
> This patch introduces a static `create` method to `PDICCBased` which optionally caches/retrieves the color space from cache. Accordingly, the constructor taking a `COSArray` has been made private, and the validity tests moved to the static `create` method.   
> Testing on the example from PDFBOX-4392 the patch improves both time and memory consumption. Presumably it will help with any PDF with ICC-based profiles which are re-used by many images. 



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