On Fri, Jul 28, 2017 at 6:00 PM, Bill Spitzak <spit...@gmail.com> wrote:
> I think the stacking order of glyphs can remain undefined for > cairo_show_glyphs. This seems more like something pango would be in > charge of. > We are talking about order of glyphs drawn in one cairo_show_glyphs(), so I don't see how this is pango's job. > > On Fri, Jul 28, 2017 at 7:38 AM, Behdad Esfahbod <beh...@behdad.org> > wrote: > > Uli, > > > > Can we commit this? I don't think waiting another few years will result > in > > a superior patchset. :) > > > > Cheers, > > > > behdad > > > > On Wed, Jul 19, 2017 at 1:53 AM, Behdad Esfahbod <beh...@behdad.org> > wrote: > >> > >> Right. In the future we would want to make it show glyphs in the input > >> order, ie. not separate color vs non-color. That's the order required > by > >> CSS for example. In a show-text-glyphs call with > >> CAIRO_TEXT_CLUSTER_FLAG_BACKWARD, it might be desirable to show > >> back-to-front. > >> > >> On Tue, Jul 18, 2017 at 1:59 PM, Matthias Clasen > >> <matthias.cla...@gmail.com> wrote: > >>> > >>> On Sat, Jul 15, 2017 at 4:05 AM, Uli Schlachter <psyc...@znc.in> > wrote: > >>>> > >>>> On 07.07.2017 15:23, Matthias Clasen wrote: > >>>> > On Sat, Jul 1, 2017 at 2:25 AM, Uli Schlachter <psyc...@znc.in> > wrote: > >>>> >> On 30.06.2017 17:29, Behdad Esfahbod wrote: > >>>> >>> On Jun 30, 2017 7:51 PM, "Matthias Clasen" <mcla...@redhat.com> > >>>> >>> wrote: > >>>> >>> On Fri, 2017-06-30 at 17:02 +0200, Uli Schlachter wrote: > >>>> >>>> On 28.06.2017 14:23, Behdad Esfahbod wrote: > >>>> >>>>> All of you have asked me about the status of color fonts in > >>>> >>>>> cairo. There's > >>>> >>>>> some discussion here: > >>>> >>>> > >>>> >>>> what was the solution to make this fit into cairo's drawing > model? > >>>> >>>> Text > >>>> >>>> / glyphs are used as a mask and a mask does not have colors. > >>>> >>>> > >>>> >>> > >>>> >>> There is no solution to that. The assumption in cairo's drawing > >>>> >>> model > >>>> >>> about glyphs/fonts has simply been invalidated by reality. > >>>> >>> > >>>> >>> > >>>> >>> Correct. > >>>> >> > >>>> >> 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. > >>>> > >>>> Hi again, > >>>> > >>>> I just came up with another question: How are overlapping glyphs > >>>> handled? > >>>> > >>>> Let's say I have a red glyph and a blue glyph and I draw them in such > a > >>>> way that they overlap. Let's say this additionally overlaps with a > >>>> non-colored glyph in the same position and I use a green source with > 50% > >>>> alpha (cairo_set_source_rgba(cr, 0, 1, 0, 0.5)). > >>>> > >>>> What's the visible result? > >>>> > >>> > >>> Here is what my implementation does: It renders the color glyphs, in > >>> order, followed by the non-color glyphs. > >>> > >>> In practice, I don't think the case of mixed color and non-color glyphs > >>> in the same call will be all that common. > >>> Most apps will explicitly set a color font just for the emoji and they > >>> won't render regular text with an emoji font, > >>> with the result that runs of color glyphs and non-color glyphs will > >>> typically be in separate calls. > >> > >> > >> > >> > >> -- > >> behdad > >> http://behdad.org/ > > > > > > > > > > -- > > behdad > > http://behdad.org/ > > > > -- > > cairo mailing list > > ca...@cairographics.org > > https://lists.cairographics.org/mailman/listinfo/cairo > -- behdad http://behdad.org/
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