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/
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