[TYPO3-core] RFC: Bugfix for Image Generation in t3lib_div

[Ingo Renner]

Am 17.09.2007 um 22:22 schrieb Martin Kutschker:

> In this case the (internal) function can be removed completely.

I'm not sure whether this'll be so easy... who knows who accesses  
this method... That's why I'd keep it as a wrapper.

> I am a bit reluctant to remove it like that, when there is such an
> elaborate comment above the code. Anybody knows which PHP version the
> comment is about?
>
> And, more interesting, why creates ImagePng() a black background?  
> Has it
> something to do with imagealphablending() or if the image is  
> created by
> imagecreatetruecolor() or a simple imagecreate()?

In this case the original image was a gif image, it was then  
converted to png using GM and kept the transparency.
Then it was read with imagefrompng() and the first overlay was  
applied an written to disk using imagepng(). All cool and nice until  
here, still transparent. After that the same $im image resource was  
used to apply the second overlay and when writing it to disk (with  
imagepng()) this time it got the black background...

So I don't know what happens there... and as it works with the plain  
imagecopyresized() I'd just go for it as you would...


Ingo
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