It was actually not that complicated: https://bugs.freedesktop.org/show_bug.cgi?id=102661
On Mon, Sep 11, 2017 at 1:44 AM, Uli Schlachter <psyc...@znc.in> wrote: > Hi everyone, > > yesterday I was asked to comment here: > > https://github.com/i3/i3/pull/2925 > > The issue seems to be: With operator SOURCE, drawing a color glyph > clears the entire surface. So, while "normal" glyphs are supposed to be > a mask that is then filled, color glyphs seem to be handled as an > unbounded source. This doesn't make a difference for OVER, but for lots > of other operators (at least SOURCE) it obviously matters. > > I didn't investigate this at all. I did not even try to reproduce. > Hence, this ping. Could one of you please look at this, confirm this > really happens, and say what should be done about this? Thanks. > > And yes, in the thread on color fonts, Matthias Clasen answered one of > my questions with: > > >> Okay... so what is the new model? What happens when I draw a color glyph > >> with operator XOR and a red source? > > > > > > The red source is ignored for color glyphs because they are used as the > > source. > > So apparently this behaviour is by design, meaning that glyphs can only > really be used with operator OVER any more (well, and some others). So > let me ask this another why: Is this really a good behaviour? > > Oh and one more thing: Who updates cairo's docs and all the explanations > on the web page? ("glyphs work like this, except when they do not"). > > Cheers, > Uli > > P.S.: The list of recipents is copied from the recent thread on color > fonts. I have no overview of how people ended up in this list. Sorry if > $YOU are the wrong recipent. > P.P.S: Yes, I also included Gtk-devel-list. I vaguely remember someone > saying that this stuff is relevant there. Dear moderator, sorry for the > work that this causes you. > -- > 99 little bugs in the code > 99 little bugs in the code > Take one down, patch it around > 117 little bugs in the code > -- @irqed > -- behdad http://behdad.org/
_______________________________________________ gtk-devel-list mailing list gtk-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-devel-list
