[TYPO3-english] Scaling transparent PNGs in TYPO3

[Christian Lerrahn]

Hi Jigal,
On Wed, 22 Aug 2012 09:32:23 +0200
Jigal van Hemert <jigal.van.hemert at typo3.org> wrote:

> Hi,
> 
> On 21-8-2012 9:37, Christian Lerrahn wrote:
> > The problem I have is that when TYPO3 scales down a transparent PNG,
> > the alpha channels get messed up. After scaling, the transparent
> > part is only semi-transparent and there are speckles along the
> > foreground's edges.
> [...]
> > I've put up samples of scaled and unscaled images at
> > http://www.cerebrum.com.au/imagemagick-problems.html
> 
> The scaled image is a PNG, but only the 8-bit (256 colour) kind. The 
> first thing that I would check is if in the Install Tool you have
> [GFX][png_truecolor] = 1

Thanks for that. I had never noticed this setting. To be honest I'm not
sure why it would still default to false even though the requirements
for this probably have been met on pretty much any system for years. :(

Cheers,
Christian