Itai Shaked created PDFBOX-4156:
-----------------------------------
Summary: Possible optimization of SampledImageReader.from8bit by
using InterleavedRaster
Key: PDFBOX-4156
URL: https://issues.apache.org/jira/browse/PDFBOX-4156
Project: PDFBox
Issue Type: Improvement
Components: Rendering
Affects Versions: 2.0.8
Reporter: Itai Shaked
Attachments: interleaved_raster.patch
I noticed {{SampledImageReader.from8Bit}} assumed the source data to be
interleaved, which means if the target raster uses an interleaved sample model,
the data can by directly copied.
This can save 10-15% of total render time in files with large 8-bit images
(tested on samples from PDFBOX-2092 , PDFBOX-3791 and the file
"gs-bugzilla690022.pdf" from PDFBOX-4151).
In PDFBOX-2092 there is a discussion about how the sample model must be Banded,
but I couldn't find a place in the code that directly relies on this, and the
few tests I have run did not reveal problems. Perhaps the constraint is
obsolete, or else it means custom sample models cannot be used?
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
