Re: SVG to PNG

Pro Turm <[email protected]> Wed, 18 Nov 2020 13:21:37 +0100
Newsgroups gmane.comp.video.graphicsmagick.help
Message-ID <CADC9rU-hFtepwCL0bgtj84G1yNA11rigqtRE67JaO-WscbJSdQ@mail.gmail.com>
To mention the problem with Calibri appears for me on Linux (and would
probably appear on Windows, where MS Office is not installed).

> it is possible to add your own type configuration file (prepared by hand)
and add an inclusion for it to type.mgk.
Here my problem with this: How could I map a font to another, using
type.mgk ? I would like to map Calibri to e.g. Carliot font ?

Am Di., 17. Nov. 2020 um 15:25 Uhr schrieb Bob Friesenhahn <
[email protected]>:

> On Tue, 17 Nov 2020, Pro Turm wrote:
>
> > Thanks.
> > It was a more prosaic reason for the above. StaticModules[] are traversed
> > alphabetically, and if they are not declared alphabetically for loading
> > (e.g.
> >
> > STATICM("SVG",RegisterSVGImage,UnregisterSVGImage)), than they are not
> > registered :
> >
> >     if (StaticModules[index].name[0] > module_name[0])
> >
> >        break;
>
> It is indeed true that the list is ordered and this is used as a form
> of optimization when searching.  The list is ordered as delivered.
>
> > Another questions arouse further:
> > What kind of fonts are a prerequisite? I'm having a Calibri font in the
> > svg, and graphicsmagick has a fallback to urw fonts (n019004l.pfb)? If
> they
> > are Ghostscript installed fonts I would have a problem with the license.
> > What would be the right approach to follow in this case, i.e. whats
> > GraphicsMagick design about fonts?
>
> The GraphicsMagick design regarding fonts is perhaps a bit weak since
> it is not tightly integrated with the Windows operating system.  Font
> rendering is not dependent on the operating system although font
> discovery may be aided by the operating system.
>
> In the 'config' sub-directory you will see files named starting with
> 'type'.  For example:
>
>    type-ghostscript.mgk.in
>    type-solaris.mgk.in
>    type-windows.mgk.in
>    type.mgk.in
>
> For the Autoconf configure-based build, these have substitutions
> performed on them and then they become files which end with '.mgk'
> rather than '.mgk.in'.
>
> Likewise, in the VisualMagick/bin directory I currently see:
>
>    type-ghostscript.mgk
>    type.mgk
>
> Normally what happens is that type.mgk is loaded, and this may include
> other files (such as type-ghostscript.mgk).
>
> For Microsoft Windows there is a special case in that Windows fonts
> are also found via the Windows registry.  In magick/nt_feature.c there
> is a NTGetTypeList() function which attempts to discover fonts via the
> Windows registry and then deduce their characteristics based on
> naming.
>
> Regardless of use of the registry, it is possible to add your own type
> configuration file (prepared by hand) and add an inclusion for it to
> type.mgk.  This could be useful if you have some proprietary fonts you
> would like to use.  They would not need to be formally installed in
> the operating system.
>
> Regarding the "Ghostscript" fonts, Aladdin Ghostscript no longer
> distributes the supposed "Ghostscript" fonts (which really came from
> URW by agreement with the FSF).  It is my understanding that these
> files were distributed via the GPLv2 license.  I distribute these
> files on the GraphicsMagick ftp site in the delegates directory as
> 'ghostscript-fonts-std-8.11.tar.gz'.  The "Ghostscript" fonts do not
> require Ghostscript in order to be rendered since they are rendered
> directly using FreeType.  Currently, the "Ghostscript" fonts are
> discovered by first searching for an installed Ghostscript using the
> Windows registry.  In the provided type-ghostscript.mgk, the path to
> the Ghostscript fonts is substituted at run-time by replacing
> '@ghostscript_font_dir@' with the actual path.
>
> If you are sensitive to license, then take care about Ghostscript
> since it is offered under several different licenses depending on how
> old the Ghostscript is, and who offers it.  To me, the AGPL license
> does not seem suitable for some uses without paying Aladdin for a
> license.  Aladdin is interested in getting commercial users to pay to
> use AGPL Ghostscript if they run it on a server or otherwise prepare
> content which is downloaded by a user.
>
> Test the availability of fonts using this command:
>
>    gm convert -list type
>
> It will show how fonts were discovered and which fonts are available.
>
> Bob
> --
> Bob Friesenhahn
> [email protected], http://www.simplesystems.org/users/bfriesen/
> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
> Public Key,     http://www.simplesystems.org/users/bfriesen/public-key.txt
>
>
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