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https://issues.apache.org/jira/browse/IMAGING-243?focusedWorklogId=346992&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-346992
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ASF GitHub Bot logged work on IMAGING-243:
------------------------------------------
Author: ASF GitHub Bot
Created on: 20/Nov/19 20:28
Start Date: 20/Nov/19 20:28
Worklog Time Spent: 10m
Work Description: kinow commented on pull request #58: [IMAGING-243] PNG
Writer Indexed Color with semi-transparent Pixels and Better Compression
URL: https://github.com/apache/commons-imaging/pull/58#discussion_r348728912
##########
File path: src/main/java/org/apache/commons/imaging/formats/png/PngWriter.java
##########
@@ -596,8 +588,10 @@ public void writeImage(final BufferedImage src, final
OutputStream os, Map<Strin
// Debug.debug("uncompressed", uncompressed.length);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
- final DeflaterOutputStream dos = new DeflaterOutputStream(baos);
final int chunkSize = 256 * 1024;
+ Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION);
Review comment:
I think it's not necessary. These values are already at the `Deflater`
class, and may change. So we should be better allowing users to pass anything.
There is also a ticket I think to allow for other compression algorithms (even
though specification uses only Deflater, it says vendors can use other
algorithms), in which case it could lead to having more values for each
algorithm.
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Issue Time Tracking
-------------------
Worklog Id: (was: 346992)
Time Spent: 0.5h (was: 20m)
> PNG Writer Indexed Color with semi-transparent Pixels and Better Compression
> ----------------------------------------------------------------------------
>
> Key: IMAGING-243
> URL: https://issues.apache.org/jira/browse/IMAGING-243
> Project: Commons Imaging
> Issue Type: Improvement
> Components: Format: PNG
> Affects Versions: 1.0-alpha1
> Reporter: Andreas
> Assignee: Bruno P. Kinoshita
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.0-alpha2
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> I updated the PNG-Writer for smaller png-Files:
> * PNG Writer Indexed Color with semi-transparent Pixels
> * Better Compression
>
> See Pull-Request: [https://github.com/apache/commons-imaging/pull/58]
>
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