Opened 15 years ago

Closed 14 years ago

Last modified 14 years ago

#813 closed defect (fixed)

PNG8 Compression isn't preserving fill colors

Reported by: zspitzer Owned by:
Priority: high Milestone: 2.2
Component: Rendering Service Version: 2.0.2
Severity: major Keywords:
Cc: brucedechant External ID: 1331830

Description

When the PNG8 compression is applied with map tiles, depending on the number of colors in the tile, the fill colors aren't preserved. The difference is subtle but really shows up for example with larger polygons, ie like the ocean or the base backgorund color for the map.

related to #465

Attachments (2)

mapguide_png8_artifacts.png​ (113.1 KB ) - added by zspitzer 15 years ago.
example of png 8 coloration problems
mapguide_png8_artifacts_2.png​ (46.2 KB ) - added by zspitzer 15 years ago.
2nd example, this time with 3 different colors for the sea

Download all attachments as: .zip

Change History (8)

by zspitzer, 15 years ago

Attachment: mapguide_png8_artifacts.png​ added

example of png 8 coloration problems

by zspitzer, 15 years ago

Attachment: mapguide_png8_artifacts_2.png​ added

2nd example, this time with 3 different colors for the sea

comment:1 by waltweltonlair, 14 years ago

Was this addressed as part of RFC60?

comment:2 by zspitzer, 14 years ago

Resolution: → fixed
Status: new → closed

yep, RFC60 resolved this, closing

comment:3 by brucedechant, 14 years ago

Milestone: → 2.2

Fixed in trunk. r4484

comment:4 by brucedechant, 14 years ago

Fixed in sandbox/adsk/2.2gp r5035

comment:5 by brucedechant, 14 years ago

External ID: → 1331830

comment:6 by brucedechant, 14 years ago

Cc: brucedechant added
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