I don't know Cairo lib and how to manage PDF, but looking at the features and uses of Cairo, for grease pencil requirements is like using a sledgehammer to crack a nut!
Anyway, if this is the way to go we could try. Antonio El mié, 9 dic 2020 a las 20:53, Ray Molenkamp via Bf-committers (< bf-committers@blender.org>) escribió: > I can't say I'm super thrilled to build cairo on windows, > but if that's the direction we want to go, so be it. > > --Ray > > > On 2020-12-09 11:19 a.m., Brecht Van Lommel via Bf-committers wrote: > > I'm not sure there exists a simple utility to convert SVG to PDF that we > > could include, if we want to go that way? > > > > Inkscape uses Cairo for PDF writing, that could be a more actively > > maintained alternative. > > https://www.cairographics.org/ > > > > It has also been proposed to be added to handle Wayland window > decorations > > in D7989, so it would let us solve both problems with one library. > > > > > > On Wed, Dec 9, 2020 at 11:46 AM Antonio Vazquez via Bf-committers < > > bf-committers@blender.org> wrote: > > > >> There are several reasons why I decided to use libharu. > >> > >> * The PDF format is very stable and does not change substantially, so we > >> are not at great risk due to format changes. > >> * I already know that this library is not maintained, but since the PDF > >> format does not change, it does not require much maintenance. > >> * This library is widely used in other software to generate PDF, so it > is > >> well proven. > >> > >> Regarding the bugs you comment, I have seen that several have a patch to > >> solve them, but in any case, the use I make of the library does not > include > >> using images, only a very simple use. I do not expect, in the short or > >> medium term, to use anything related to appending images, so these bugs > do > >> not affect us at all. Attaching images to a PDF does not make much > sense in > >> our case. > >> > >> Including a converter from SVG could work, but the problem is that in > PDF > >> we can generate a document with several pages and in SVG I have not seen > >> that this is supported. Imagine that we want to generate a storyboard > with > >> 100 frames ... we would need to export 100 SVG and join them later ... > now > >> that is very simple. We would also have to assess the speed of the > >> conversion, since now it is all C / C ++ and it is very fast. > >> > >> The other option I have been considering is to fork libharu and create a > >> tiny version with the functions we need and remove any appended image > >> support. > >> > >> Antonio > >> > >> El mié, 9 dic 2020 a las 0:46, Campbell Barton via Bf-committers (< > >> bf-committers@blender.org>) escribió: > >> > >>> Hi Antonion, > >>> > >>> From what I can tell libharu hasn't been very active since 2013, their > >>> site states they're looking for a new maintainer. > >>> Would we become the defacto maintainers of this library? > >>> > >>> I checked their issue tracker, while many reports are support requests > >>> and build issues, there are some more serious looking issues too, eg: > >>> > >>> https://github.com/libharu/libharu/issues/73 > >>> https://github.com/libharu/libharu/issues/71 > >>> https://github.com/libharu/libharu/issues/63 > >>> > >>> Is there a significant advantage in integrating a library compared > >>> with bundling a utility that converts SVG to PDF? > >>> In this case it could be an optional dependency, or we bundle the > >>> conversion tool in official releases so PDF support is still > >>> integrated from a user perspective. > >>> > >>> On Wed, Dec 9, 2020 at 6:31 AM Antonio Vazquez via Bf-committers > >>> <bf-committers@blender.org> wrote: > >>>> Hi All, > >>>> > >>>> > >>>> > >>>> As some of you may already know, for version 2.92 we want to focus on > >> the > >>>> Import and Export processes of Grease Pencil (T83190). > >>>> > >>>> > >>>> > >>>> Currently, the grease pencil is in some way an "island" in the studios > >>>> pipeline and we need to add tools to integrate it. Part of these > >>>> integration processes were the work we did to make image traces (2.91) > >>> and > >>>> shortly, video traces (2.92). > >>>> > >>>> > >>>> > >>>> During the contacts that the members of grease pencil team usually > have > >>>> with 2D studios, they have detected that some commercial software very > >>>> important in the studios pipeline does not support the import of SVG, > >> but > >>>> of PDF. In addition, the PDF format allows working in many softwares > >> and > >>> is > >>>> very useful for generating storyboards and work in comics. > >>>> > >>>> > >>>> > >>>> Past weeks, I have been working on a new I/O module for grease pencil > >> in > >>> C > >>>> ++ and I already have the SVG Importer (T79875) and the SVG Exporter > >>>> (T83191) and PDF Exporter (T83192) working. All work has been done on > a > >>>> private branch on my PC. > >>>> > >>>> > >>>> > >>>> You can see a PDF exporter video here: https://youtu.be/BMm0KeMJsI4 > >>>> > >>>> > >>>> > >>>> To export to PDF I have used an open source library (libharu > >>>> http://libharu.org/) and would need to integrate that library into > >>> Blender. > >>>> This library is very simple (<1.6 MB on Windows) and allows export to > >> PDF > >>>> easily. > >>>> > >>>> > >>>> > >>>> Finally, exporting to PDF opens up a world of possibilities and > >>> especially > >>>> when the new LineArt module will be integrated into Blender. > >>>> > >>>> > >>>> > >>>> If we agree to integrate libharu, I can prepare the patch for review > >> the > >>>> I/O code I did. > >>>> > >>>> > >>>> > >>>> I would like to hear your opinions. > >>>> > >>>> > >>>> > >>>> Best Regards, > >>>> > >>>> Antonio Vázquez > >>>> > >>>> Grease Pencil Team > >>>> _______________________________________________ > >>>> Bf-committers mailing list > >>>> Bf-committers@blender.org > >>>> https://lists.blender.org/mailman/listinfo/bf-committers > >>> > >>> > >>> -- > >>> - Campbell > >>> _______________________________________________ > >>> Bf-committers mailing list > >>> Bf-committers@blender.org > >>> https://lists.blender.org/mailman/listinfo/bf-committers > >>> > >> _______________________________________________ > >> Bf-committers mailing list > >> Bf-committers@blender.org > >> https://lists.blender.org/mailman/listinfo/bf-committers > >> > > _______________________________________________ > > Bf-committers mailing list > > Bf-committers@blender.org > > https://lists.blender.org/mailman/listinfo/bf-committers > _______________________________________________ > Bf-committers mailing list > Bf-committers@blender.org > https://lists.blender.org/mailman/listinfo/bf-committers > _______________________________________________ Bf-committers mailing list Bf-committers@blender.org https://lists.blender.org/mailman/listinfo/bf-committers