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List: kde-bugs-dist
Subject: [Bug 122868] New: Transparent Borders in Contact List for Buddy PNG
From: Sebastien <slaout () linux62 ! org>
Date: 2006-02-28 23:00:24
Message-ID: 20060301000022.122868.slaout () linux62 ! org
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http://bugs.kde.org/show_bug.cgi?id=122868
Summary: Transparent Borders in Contact List for Buddy PNG Image
with Transparency
Product: kopete
Version: unspecified
Platform: SuSE RPMs
OS/Version: Linux
Status: NEW
Severity: normal
Priority: NOR
Component: general
AssignedTo: kopete-devel kde org
ReportedBy: slaout linux62 org
Version: (using KDE KDE 3.5.1)
Installed from: SuSE RPMs
It is possible to get/set an image to a buddy (or a big icon, photo).
This image can be a PNG.
And this PNG can be fully or partially transparent.
Then, in the buddy-list window, when using the very detailed view (big \
photo + name + description + state + proctocol), there is a 1px black \
border arround those buddy images.
But when the image edges are transparent, the border does not appear on \
transparent pixels, and is faded out on semi-transparent pixels.
A picture is worth thousand words:
http://slaout.linux62.org/kde-wishs/msn_picture_transparent.png
The black border appears only when the image edge was not transparent.
BTW: The user with such a transparent budy-photo is using Kopete.
Perhapse MSN does not allow transparency and Kopete should forbid that.
It is due to the fact that QPixmap store the alpha channel in a separate \
pixmap-buffer. Then, when drawing the black border, the alpha channel keep \
the border transparent.
You have three ways to solve it:
- [BLACK BORDER EVERYWHERE]: Transform QPixmap to QImage and manipulate the \
bits yourself: set the border alpha to opaque. Then transform the QImage \
back to QPixmap.
- [NO TRANSPARENCY]: Create a white pixmap (in fact, not white, but of the \
current background color), paint the budy-image over it, and draw the \
border normally.
- [NO BORDER WHEN TRANSPARENCY]: Choose not to add the black border when \
the image has an alpha channel, because the user wanted a transparent \
image, so it is not marrying well with border.
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