Display issues (Was: Next GNUstep release)

[Riccardo Mottola]

Hi,

Sergii Stoian wrote:
> Hi,
>
> > On Feb 27, 2020, at 23:09, Riccardo Mottola <address@hidden> wrote:
> >
> > Hi,
> >
> > before a release, I would like these issues to find a solution.
> >
> > - understand why we don't work properly on my ThinkPad T23 neither with the 
> > Cairo nor with the xlib backend with similar issues
> Could you please be more specific and describe these issues?

I have an issue I am working on with Fred, I can forward you some mail 
because they contain screenshot and I did not spam the mailing list.

Essentially I discovered that many windows contain "garbage" and what we 
discovered so far
- certain windows width cause garbage do be displayed, resizing the 
window may cause it do display correctly
- this garbage is compatible with an wrong offset increasing for each 
row (you see diagonal lines if  you have a white window with a border)
- the issue happens both with cairo and xlib (recent discovery of two 
days ago, before we were concentrating on a cairo issue)

it looks like an issue that somwehre a padding/alignment is lost: e.g. 
width*bytesPerPixel != bytesPerRow, but where?

I have not seen this issue elsewhere. The T23 is itself a pretty 
standard setup: Devuan ascii, GCC runtime, i386. Only the videocard is a 
little bit vintage/odd (S3) but it works with any other program except 
GNUstep :-P


Riccardo