De : Han-Wen Nienhuys <[1]hanw...@gmail.com>
À : Jean Abou Samra <[2]j...@abou-samra.fr>
CC : Jonas Hahnfeld <[3]hah...@hahnjo.de>, lilypond-devel
<[4]lilypond-devel@gnu.org>
Date : 06/01/2023 18:53 CET
Sujet : Re: Missing items to make Cairo ready
On Sun, Jan 1, 2023 at 12:36 PM Jean Abou Samra <[5]j...@abou-samra.fr>
wrote:
>
Le 30/12/2022 à 13:08, Jean Abou Samra a écrit :
which means figuring out how to do PNGs via the default PS
backend and GS.
>
I looked a bit at this.
It's not insurmountable, *but*, alpha transparency is not going
to work.
transparency doesn't work today either in the PS backend, the
stencil-expressions.ly regtest looks different in Cairo and the
classic backend. See commit 103ca4c38061754f612880bcc7c29b4fd5acb8f6.
Yes. However, you don’t get a transparent
color without having explicitly asked for it. On the
other hand, if we have this discrepancy that the PS
backend draws PNG images on a white background
while the Cairo backend makes the transparent parts
really transparent, we have one more incompatibility
that people will need to pay attention to when switching
to Cairo. That’s why I prefer making all backends default
to a white background.
References
1. mailto:hanw...@gmail.com
2. mailto:j...@abou-samra.fr
3. mailto:hah...@hahnjo.de
4. mailto:lilypond-devel@gnu.org
5. mailto:j...@abou-samra.fr
