Opened 17 years ago

Closed 16 years ago

#193 closed defect (fixed)

Rendering: JPG and GIF output do not use transparency over background areas

Reported by: jbirch Owned by:
Priority: medium Milestone:
Component: General Version: 1.2.0
Severity: major Keywords:
Cc: External ID: 943488

Description

I have been attempting to use the JPG output format to reduce image size.

I noticed that, unlike the PNG format, the JPG and GIF formats do not appear to respect the background colour when rendering a feature that has an transparency value set, and instead renders any portion of the feature overlapping background areas at full-saturation.

I believe that the behaviour of the PNG format, to honour the background colour when applying transparency, is more appropriate.

Attachments (1)

transparency_problem.png​ (45.0 KB ) - added by jbirch 17 years ago.

Download all attachments as: .zip

Change History (3)

by jbirch, 17 years ago

Attachment: transparency_problem.png​ added

comment:1 by rexszeto, 17 years ago

External ID: → 943488

comment:2 by jbirch, 16 years ago

Resolution: → fixed
Status: new → closed

I believe that this may have been addressed in 2.0.0, at least in the AGG renderer.

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