<div dir="ltr"><div><div>Uli,<br><br></div>Can we commit this? I don't think waiting another few years will result in a superior patchset. :)<br><br></div><div>Cheers,<br><br></div>behdad<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 19, 2017 at 1:53 AM, Behdad Esfahbod <span dir="ltr"><<a href="mailto:behdad@behdad.org" target="_blank">behdad@behdad.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">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_<wbr>BACKWARD, it might be desirable to show back-to-front.<br></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Tue, Jul 18, 2017 at 1:59 PM, Matthias Clasen <span dir="ltr"><<a href="mailto:matthias.clasen@gmail.com" target="_blank">matthias.clasen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div class="m_1892149261182017342h5">On Sat, Jul 15, 2017 at 4:05 AM, Uli Schlachter <span dir="ltr"><<a href="mailto:psychon@znc.in" target="_blank">psychon@znc.in</a>></span> wrote:<br></div></div><div class="gmail_extra"><div class="gmail_quote"><div><div class="m_1892149261182017342h5"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On 07.07.2017 15:23, Matthias Clasen wrote:<br>
> On Sat, Jul 1, 2017 at 2:25 AM, Uli Schlachter <<a href="mailto:psychon@znc.in" target="_blank">psychon@znc.in</a>> wrote:<br>
>> On 30.06.2017 17:29, Behdad Esfahbod wrote:<br>
>>> On Jun 30, 2017 7:51 PM, "Matthias Clasen" <<a href="mailto:mclasen@redhat.com" target="_blank">mclasen@redhat.com</a>> wrote:<br>
>>> On Fri, 2017-06-30 at 17:02 +0200, Uli Schlachter wrote:<br>
</span><span>>>>> On 28.06.2017 14:23, Behdad Esfahbod wrote:<br>
>>>>> All of you have asked me about the status of color fonts in<br>
>>>>> cairo. There's<br>
>>>>> some discussion here:<br>
>>>><br>
>>>> what was the solution to make this fit into cairo's drawing model?<br>
>>>> Text<br>
>>>> / glyphs are used as a mask and a mask does not have colors.<br>
>>>><br>
>>><br>
>>> There is no solution to that. The assumption in cairo's drawing model<br>
>>> about glyphs/fonts has simply been invalidated by reality.<br>
>>><br>
>>><br>
>>> Correct.<br>
>><br>
>> Okay... so what is the new model? What happens when I draw a color glyph<br>
>> with operator XOR and a red source?<br>
><br>
><br>
> The red source is ignored for color glyphs because they are used as the<br>
> source.<br>
<br>
</span>Hi again,<br>
<br>
I just came up with another question: How are overlapping glyphs handled?<br>
<br>
Let's say I have a red glyph and a blue glyph and I draw them in such a<br>
way that they overlap. Let's say this additionally overlaps with a<br>
non-colored glyph in the same position and I use a green source with 50%<br>
alpha (cairo_set_source_rgba(cr, 0, 1, 0, 0.5)).<br>
<br>
What's the visible result?<br>
<br></blockquote><div><br></div></div></div><div>Here is what my implementation does: It renders the color glyphs, in order, followed by the non-color glyphs.<br><br>In practice, I don't think the case of mixed color and non-color glyphs in the same call will be all that common.<br>Most apps will explicitly set a color font just for the emoji and they won't render regular text with an emoji font,<br>with the result that runs of color glyphs and non-color glyphs will typically be in separate calls.<br></div></div></div></div>
</blockquote></div><br><br clear="all"><br></div></div><span class="HOEnZb"><font color="#888888">-- <br><div class="m_1892149261182017342gmail_signature" data-smartmail="gmail_signature">behdad<br><a href="http://behdad.org/" target="_blank">http://behdad.org/</a></div>
</font></span></div>
</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">behdad<br><a href="http://behdad.org/" target="_blank">http://behdad.org/</a></div>
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