alpha troubles 2

[FLySOLO]

hi xarapeople,

1st thanx for the small fixes in xara 1.0a

2nd i found a bug that i talked earlier about but got no answer :b

attached is a bitmap that shows the same picture top: 24bit tif with grey alpha tif attached in x
middle: 32bit tif with alpha included
bottom: same as top but on a flat blue rectangle

conclusion: there seems to be a calculation bug on tif export. notice the shift (2 pixel right & up) on the 1st bitmap.

so why don´t i just shut up and use the 32bit tif with included alpha?

because it´s less flexible...

help

thanx

FLySOLO

[FLySOLO]

hi xarapeople,

1st thanx for the small fixes in xara 1.0a

2nd i found a bug that i talked earlier about but got no answer :b

attached is a bitmap that shows the same picture top: 24bit tif with grey alpha tif attached in x
middle: 32bit tif with alpha included
bottom: same as top but on a flat blue rectangle

conclusion: there seems to be a calculation bug on tif export. notice the shift (2 pixel right & up) on the 1st bitmap.

so why don´t i just shut up and use the 32bit tif with included alpha?

because it´s less flexible...

help

thanx

FLySOLO

[FLySOLO]

64 views - no replies

am i the only one with this problem?
did i make myself not clear?

alpha transparency is a great feature of xara...

so please reply

FLySOLO

[FLySOLO]

hello!? alpha anyone?

FLY_nevergetsananswer_SOLO

[Sean Sedwards]

Actually, I had a go but couldn't reproduce your results.

Please explain how you created the image and alpha.

Regards - Sean

[mike engles]

Hello

It has possibly something to do with antialiasing.
In the PNG export dialogue there is a option to use screen or another antialiasing.
The second option does change the position of objects to improve exports.

Read the help in the dialogue. It might be an
explanation. I have noticed slight shifts.

Mike Engles

[FLySOLO]

oops didn´t want to disturb... sean
thanx for the answer
i´m going to attach a new picture to explain the errors.
btw. exporting the attached picture as png worked fine serveral times and finally exproting it as jpg caused a fatal error in xara (1.0a)

what you see in the attached picture is the result of three exports of the same picture with slight background changings. on screen in the xara document everything is fine. no visible errors...

mike,
i tried some time with the png export options and sometimes it seemed to work but switching to a diffent output size resulted in different output errors (misalignments of the alpha map.

FLySOLO

[FLySOLO]

:begin
move topic to top
goto end

:end
echo [img]/infopop/emoticons/icon_smile.gif[/img]

[jens g.r. benthien]

FlySolo,

there is a bug in the TIF export, I already posted several messages but did not get an answer. Not only with alpha channel, all TIF exports produce artefacts, leave parts of objects or mess up the output file.

I did it with simple shapes and text, adding a bevel, and it drove me crazy. However, when I exported the same objects as a PNG, everything was excellent.

Maybe we should be patient and wait for a silent bug fix.

ciao,
jens

[Klaus Nordby]

I, too, have had strange and serious TIF exports like yours, pertaining to bevels. Xara have asked me to send them info and files, but I haven't been able to reproduce it - maybe you should just email them your files?


K