Re: png app icons not working?

[Fred Kiefer]

I am currently investigating this issue and things look bad :-(

The display problem is caused by the _premultiply on NSBitmapImage.
(This can be easily confirmed by commenting out the _premultiply call in
the draw method)

This method in itself seems to be correct, most likely the error is in
the setPixel: or getPixel method (or rather the functions used there)
that isn't able to handle the 16 bit format of the PNG image. I am still
trying to figure out, which of these it is and how to fix it. Hope to
report back soon with better results.

Fred

On 18.10.2013 09:58, Sebastian Reitenbach wrote:
> Hi,
> 
> I'm on OpenBSD amd64, latest gnustep core releases installed, compiled with 
> clang, non-fragile-abi.
> 
> I have the following png installed: 
> png-1.6.6
> 
> configure stage of -gui is checking and finding png:
> checking for libpng-config... yes
> checking png.h usability... yes
> checking png.h presence... yes
> checking for png.h... yes
> checking for png_sig_cmp in -lpng... yes
> ...
> 
> and its also linked against it.
> 
> I tried Camera from the gsimageapps:
> http://home.gna.org/gsimageapps/
> 
> and I found that the app icon is a png. When the application starts, then
> in the app icon, and in the Info panel, I only see a white square, instead
> of the camera icon. I used gimp to resave the Camera.png as Camera.tif
> and tweaked the GNUMakefile to use the tif instead. With the tif I see the
> expected Camera icon.
> 
> Now I'm wondering what the actual problem is, something in my setup,
> something more general problem in -gui? Since this Camera is a relatively
> old app, I guess it must have worked at some point in time with the png
> image too?
> 
> cheers,
> Sebastian