[Gambas-user] Picture.ToString() ?

[Benoît Minisini]

Le 04/01/2024 à 01:55, Bruce Steers a écrit :
> 
> It seems GdkPixBuf does only support the quality flag with saving JPEG.
> https://docs.gtk.org/gdk-pixbuf/method.Pixbuf.save.html 
> <https://docs.gtk.org/gdk-pixbuf/method.Pixbuf.save.html>
> (i just put that link in the wiki to fix the current broken link @ 
> https://gambaswiki.org/wiki/comp/gb.qt4/image/save 
> <https://gambaswiki.org/wiki/comp/gb.qt4/image/save>)
> 
> I did a test and like you say jpeg saving saves as different file sizes 
> and quality but png does not, it prints the warning message and the file 
> size of quality 10 and 100 are both the same.
> 
> Quote from the page:
> 
> Currently only few parameters exist.
> 
> JPEG images can be saved with a “quality” parameter; its value should be 
> in the range |[0, 100]|. JPEG and PNG density can be set by setting the 
> “x-dpi” and “y-dpi” parameters to the appropriate values in dots per inch.
> 
> etc, etc
> 
> Respects
> 
> BruceS
> 

The list of supported image file formats is dynamic, both in QT and 
GTK+. So different systems may support different file formats.

I can patch 'gb.gtk' so that the "quality" argument is transformed into 
"compression" for PNG files, so that there is no warning anymore.

Regards,

-- 
Benoît Minisini.