Itai Shaked created PDFBOX-4411:
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Summary: 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
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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