[prev in list] [next in list] [prev in thread] [next in thread] 

List:       kde-kimageshop
Subject:    Re: Problems with "embedded" transparency masks onto adj. layers
From:       Dmitry Kazakov <dimula73 () gmail ! com>
Date:       2009-09-09 19:26:07
Message-ID: ae32c1ef0909091226h3a013c2agea78bfd338370897 () mail ! gmail ! com
[Download RAW message or body]

[Attachment #2 (multipart/alternative)]


> Well, we probably need to compare the current code to the code in 1.6, but
> there it worked perfectly. This is how the selection brush worked in 1.6:
>

Well, Boud, just imagine:

We have a 3x3px brush. It has crossed form.

It's alpha() channel looks like:

 0  255  0
255 255 255
 0  255  0

It's gray() channel looks like

 0  128  0
128 255 128
 0  128  0


Imagine we paint with this brush onto a transparency mask that initially
looked like:

100 100 100
100 100 100
100 100 100

In current realization we get wrong result - we just copy alpha() channel of
the brush onto mask:

 0  255  0
255 255 255
 0  255  0

Right realization should paint like a normal brush:

100 128 100
128 255 128
100 128 100

That is what i mean. =)


-- 
Dmitry Kazakov

[Attachment #5 (text/html)]

<div class="h5"><br>
</div><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: \
1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Well, we \
probably need to compare the current code to the code in 1.6, but<br>

there it worked perfectly. This is how the selection brush worked in \
1.6:<br></blockquote></div><br>Well, Boud, just imagine:<br><br>We have a 3x3px \
brush. It has crossed form.<br><br>It&#39;s alpha() channel looks like:<br> <font \
face="courier new,monospace"><br>  0   255   0 <br>255 255 255<br>  0   255   \
0<br><br><span style="font-family: arial,helvetica,sans-serif;">It&#39;s gray() \
channel looks like</span><br></font><br><font face="courier new,monospace">  0   128  \
0 <br>

128 255 128<br>
  0   128   0<br>
</font><br><br>Imagine we paint with this brush onto a transparency mask that \
initially looked like:<br><br><font face="courier new,monospace">100 100 100 <br> 100 \
100 100<br>100 100 100</font><br><br>In current realization we get wrong result - we \
just copy alpha() channel of the brush onto mask:<br><br><font face="courier \
new,monospace">  0   255   0 <br> 255 255 255<br>  0   255   0</font><br><br>Right \
realization should paint like a normal brush:<br><br><font face="courier \
new,monospace">100 128 100 <br> 128 255 128<br>
100 128 100</font><br><br>That is what i mean. =)<br><br clear="all"><br>-- \
<br>Dmitry Kazakov<br>



_______________________________________________
kimageshop mailing list
kimageshop@kde.org
https://mail.kde.org/mailman/listinfo/kimageshop


[prev in list] [next in list] [prev in thread] [next in thread]