[Geoserver-devel] [JIRA] (GEOS-9681) Weird styling for png8 and antialias:none

GeoServer GeoServer Developer
1

Bartek Burkot created an issue

GeoServer / BugGEOS-9681

Weird styling for png8 and antialias:none

Issue Type:

BugBug

Affects Versions:

2.17.0, 2.17.1

Assignee:

Unassigned

Attachments:

geoserver_bug_animated_gif.gif, topp-states1.png, topp-states2.png

Components:

styling

Created:

07/Jul/20 9:32 AM

Environment:

geoserver version 2.17.0, tomacat9, Win Server 2019 64bit, openjdk version “1.8.0_252”

Priority:

MediumMedium

Reporter:

Bartek Burkot

This bug occurs for WMS request if the format of image is png8 and format_options is set to antialias:none.
The styling of features on the map and background color is changing a kind of randomly. It depends only on the “BBOX” parameter.
Reproduction is easy: set the output format: openlayers, change image format to png8 and antialising to Disabled (antialias:none). See the animated gif in the attachement.

Reconstruction2:

*Request1: *

http://localhost:8080/geoserver217/topp/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng8&TRANSPARENT=true&LAYERS=topp%3Astates&exceptions=application%2Fvnd.ogc.se_inimage&FORMAT_OPTIONS=antialias%3Anone&CRS=EPSG%3A4326&STYLES=&WIDTH=768&HEIGHT=330&*BBOX=29.2236328125%2C-110.23681640625%2C32.84912109375%2C-101.79931640625 *

Request2:

http://localhost:8080/geoserver217/topp/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng8&TRANSPARENT=true&LAYERS=topp%3Astates&exceptions=application%2Fvnd.ogc.se_inimage&FORMAT_OPTIONS=antialias%3Anone&CRS=EPSG%3A4326&STYLES=&WIDTH=768&HEIGHT=330&BBOX=27.333984375%2C-113.62060546875%2C34.5849609375%2C-96.74560546875

Both requests differ in BBOX parameter only. The colors of features on the map and background color depend on the BBOX parameter only.

Additionaly please adjust vendor parameter values from antialias(ing):off to antialias:none. It is incorrectly documented: https://docs.geoserver.org/latest/en/user/services/wms/vendor.html
Regards

Bartek

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