On 13.09.17, Stephan Witt wrote: > Am 12.09.2017 um 09:19 schrieb Guenter Milde <mi...@users.sf.net>: > > On 14.08.17, Stephan Witt wrote: > >> Am 14.08.2017 um 14:46 schrieb Guenter Milde <mi...@users.sf.net>: > >>> On 2017-08-14, Stephan Witt wrote: > >>>> Am 14.08.2017 um 09:43 schrieb Jean-Pierre Chrétien > >>>> <jeanpierre.chret...@free.fr>:
> >>>>> No information for converting svgz format files to pdf6.\n > >>>>> Define a converter in the preferences. > >>>> One can easily see the images are converted by rsvg-convert on my Mac. > >>> Mind, that all icons in the toolbar work without external converter. > > > > Yes, OSx can convert SVG to preview-bitmaps. > > You can do this from the command line with "qlmanage" > > https://superuser.com/questions/134679/command-line-application-for-converting-svg-to-png-on-mac-os-x > The output is not useful. It’s a png - but the original svg-image sits > in the upper left corner of a big A4- or Letter-PNG. I suppose this can be solved with the correct command line arguments, but ... > > Unfortunatly, this is not a good option for SVG graphics that should > > end up as vector in the PDF output. (And, if I remember right, > > converting to a bitmap is also supported by QT.) > Yes, that’s the way I’m trying to go. A small utility based on Qt to > convert SVG (or SVGZ) to PNG (or JPEG). QT seems to have all the requirements onboard: * read and render SVG with Qt SVG: SVG drawings can be rendered onto any QPaintDevice subclass. --- http://doc.qt.io/qt-5/svgrendering.html * "print" QImage to PDF file: Since QPrinter inherits QPaintDevice, anything that supports outputting graphical content to a QPaintDevice (or has convenience API for printing with QPrinter) can thus be used for generating PDFs --- https://wiki.qt.io/Handling_PDF#Reading_.2F_Writing I don't know, whether this route keeps the image as vector or converts it to a bitmap, though. The QT wiki also mentions Hummus and PoDoFo as external libraries able to write to PDF and Inkscape as external tool. > >> A more smart conversion process should be implemented > >> instead. Isn’t this a possible problem for LyX on Linux too? > > > > In Linux, it is the work of the packagers (creating a Debian LyX package, > > say) to ensure all requirements for proper working are met. > > In Debian, this is > > > > requires: ... libqt5svg5 (>=5.6.0~beta), ... > > suggests: ..., librsvg2-bin | inkscape, … > Suggest doesn't mean required… If I got it right, libqt5svg5 is required to ensure that the GUI-preview works without external converters. According to the OP, 1) opening splash.lyx, gets a message "No information for converting svgz format files to pdf6." This seems odd, the conversion to pdf6 == PDF (graphics) only happens on *export* to PDF or *view PDF (...)*, not when just opening a file. a) There is an error when *opening* splash.lyx: This is grave but an SVG to bitmap converter suffices. b) There is an error when *compiling* splash.lyx (with View or Export): This is bad advertising but does not prevent use with documents not containing SVG images. We should provide for "painless" use of a high quality SVG -> PDF converter that keeps vector graphics as vector. Usually this means automatic setup of a converter with "configure" if a third party tool (inkscape, rsvg) is detected. Shipping (or linking to) a small third-party tool as backup would be a bonus. With the inclusion of SVG graphics in Splash and the User Guide, dependency on SVG conversion is now comparable with dependency on LaTeX, imagemagick, or a PDF viewer. The correct category for Debian would be"recommended". Package A *depends* on Package B if B absolutely must be installed in order to run A. … Package A *recommends* Package B, if the package maintainer judges that most users would not want A without also having the functionality provided by B. Package A *suggests* Package B if B contains files that are related to (and usually enhance) the functionality of A. --- https://www.debian.org/doc/manuals/debian-faq/ch-pkg_basics.en.html#s-depends This should be updated in the notes for packagers. Is there a dependency/recommendation system we could use for Mac? Or is it just a: "we recommend you also to install ..." line in the docs? > > The above link lists some options for converting SVG to other formats. > > For SVG to PDF, we have > > > > inkscape (good but large) > > > > librsvg (problem with many images on one side -- breaks the internal > > preview > > -- maybe we can solve this with some librsvg setting?) > > > > svglib pure Python, but requires ReportLab (not tested) > > https://pypi.python.org/pypi/svglib/ > > > > cairosvg based on the Cairo 2D graphics library; > > known to work at least on Linux, OS X, and Windows; > > requires Python 3 > > http://cairosvg.org/ > Cairosvg is not usable on Mac - it uses the X11 raster device. The documentation http://cairosvg.org/documentation/ explicitly states: CairoSVG is a SVG 1.1 to PNG, PDF, PS and SVG converter. It provides both a command-line interface and Python 3.4+ library, for Unix-like operating systems (at least Linux and macOS) and Windows. And as dependency: on macOS, you’ll have to install cairo, libxml2 and libffi (with Homebrew for example); What am I missing? Günter
