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Re: please....correct png support
by emmanuel on Tuesday 11/Sep/2001, @04:59
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png was supported since KDE1, and is largely used by all KDE programs (i believe all kde icons are in png no?).
well anyway no worries. check you have libpng before you compile QT. |
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Re: please....correct png support
by Andrea Albarelli on Tuesday 11/Sep/2001, @05:07
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I think the author was talking about full PNG support ... last time I checked the alpha channel in PNG wasn't supported ( alpha under 127 was transparent and >= 127 was visible ).
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Re: please....correct png support
by Richard Moore on Tuesday 11/Sep/2001, @05:12
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Qt 3 uses the XRender extension to provide hardware accelerated alpha channel support. This means that the alpha information in an image with will be applied automatically when the image is drawn.
Rich.
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Re: please....correct png support
by Richard Stellingwerff on Tuesday 11/Sep/2001, @11:41
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I wonder though, this X-Render thing is supposed to be so cool, but does it act on changes behind the alpha blended image? Because Mosfet's transparent menus do not update when a window beneath it (xchat for example) changes.
Now this usually isn't an issue with websites, but I was just wondering, is this a limitation of the X-Render, or just lazy coding from Mosfet (or anyone who uses the X-Render code)?
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Re: please....correct png support
by anonymous on Tuesday 11/Sep/2001, @15:38
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I may be wrong, but I think that the X-Render extention it's not yet in place.
If I remember well, Mosfet make transparent menus by first saving in a buffer the image behind the menu and then showing it as the background of the menu; that is why it doesn't get updated when the real background does.
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Re: please....correct png support
by Daniel Molkentin on Wednesday 12/Sep/2001, @13:16
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It is wrong. XFree has full support for XRender since 4.1 on almost all drivers.
Qt3 supports XRender. So from now on we can use XRender in KDE.
Greetings,
</daniel>
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Re: please....correct png support
by Marcus Camen on Tuesday 11/Sep/2001, @05:13
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Yep. KDE doesn't fully support transparent PNGs.
Just look at http://www.libpng.org/pub/png/pngs-img.html with Mozilla and Konqueror or go to http://bugs.kde.org/db/20/20155.html .
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Re: please....correct png support
by oliv on Wednesday 12/Sep/2001, @00:54
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Exactly what I meant :)
Thanks for precisingg my thought (for me, it was obvious, but it did not seem to actually be for everyone)
Treating PNG without the alpha channel is like dispaying a colour image in grayscale. Of course we can see something, but it's just wrong.
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Try this example
by Andrea Albarelli on Tuesday 11/Sep/2001, @05:11
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Try this example PNG created with GIMP ... the center shourd be blended.
Try saving it and loading with the GIMP ....
example.png
11KB (11537 bytes)
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Re: Try this example
by Ricardo Galli on Tuesday 11/Sep/2001, @05:30
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This example show few bugs:
1. If you right-click and select "New Window" for the first time, the new window will show the binary data.
2. The you just click and you will see a red box with a smaller white box in the center-
3. Right click again and select "New window". You will see only a red box.
Package konqueror 2.2.0.20010822-1.
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Re: Try this example
by Frerich Raabe on Tuesday 11/Sep/2001, @07:59
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Shows a red border which is blended into a black rectangle in the middle. Dunno whether it's supposed to be black, tho, but the blending certainly works.
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