Le 04/01/2023 à 12:52, Han-Wen Nienhuys a écrit :
On Thu, Dec 29, 2022 at 1:53 AM Jean Abou Samra <j...@abou-samra.fr> wrote:Hi, I have just opened issues for the missing features of the Cairo backend that I am aware of. https://gitlab.com/lilypond/lilypond/-/issues/6500 https://gitlab.com/lilypond/lilypond/-/issues/6501 https://gitlab.com/lilypond/lilypond/-/issues/6502 https://gitlab.com/lilypond/lilypond/-/issues/6503 https://gitlab.com/lilypond/lilypond/-/issues/6504 Are there any others?I've read through the discussion you started here, but IMO we're too fixated on backward compatibility, which is unfortunate because the PS -> GS -> PDF route was never thought through carefully. We started dumping PostScript because we were going through TeX before, and creating PDF at the time involved .tex => .dvi => .ps => .pdf (with .eps included into .dvi for graphics). However, at the time, PDF rather than PS was already the common format for print documents. We were also lazy, and didn't want to bother learning how to dump PDF directly. PNG images will always be clunky for embedding line art, so it can't be the recommended solution. What makes most sense for users? Other illustration programs also can't process EPS (for the same reasons we don't), so how do those programs embed line art? What is the preferred format for logos today? SVG? AI? PDF?
PNG? Look here: https://www.gnu.org/graphics/package-logos.fr.html More than half of the logos are in PNG, some are in SVG, a some in JPG. I still don't understand the criticism against logos in PNG. For something like a page watermark, I understand that vector graphics may be important, but for something the size of a logo? I looked a little bit at librsvg. On the plus side, their COMPILING.md describes how to cross-compile it with MinGW, so we know that it works. On the minus side, it pulls in Gdk-pixbuf and Libxml2.
Given the sorry state of the SVG backend, and the niche quality of the output-attributes feature, we could be justified to drop the SVG backend rather than implementing attributes in Cairo-SVG (although it sounds like a straightforward extension to Cairo).
I don't think so; look at the kind of stuff it would break: https://github.com/paopre/Spontini
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