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  1. 8
      .dir-locals.el
  2. 11
      .gitignore
  3. 1
      AUTHORS
  4. 165
      COPYING
  5. 56
      Makefile.am
  6. 77
      README
  7. 3
      bootstrap
  8. 44
      configure.ac
  9. 22
      examples/example.scm
  10. 28
      fontconfig.scm
  11. 114
      fontconfig/bindings.scm
  12. 24
      fontconfig/config.scm
  13. 24
      fontconfig/config.scm.in
  14. 40
      fontconfig/object-set.scm
  15. 156
      fontconfig/pattern.scm
  16. 92
      guix.scm
  17. 32
      pre-inst-env.in

8
.dir-locals.el
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((scheme-mode
.
((eval . (put 'call-with-window 'scheme-indent-function 1))
(eval . (put 'call-with-renderer 'scheme-indent-function 1))
(eval . (put 'surface-parse-match 'scheme-indent-function 1))
(eval . (put 'pixel-format-parse-match 'scheme-indent-function 1))
(eval . (put 'palette-parse-match 'scheme-indent-function 1))
(eval . (put 'color-parse-match 'scheme-indent-function 1)))))

11
.gitignore
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/Makefile
/Makefile.in
/aclocal.m4
/autom4te.cache
/build-aux
/config.log
/config.status
/configure
/pre-inst-env
*.go
/sdl2/config.scm

1
AUTHORS
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Nicolò Balzarotti <nicolo@nixo.xyz>

165
COPYING
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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".
The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.
1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.
2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
version:
a) under this License, provided that you make a good faith effort to
ensure that, in the event an Application does not supply the
function or data, the facility still operates, and performs
whatever part of its purpose remains meaningful, or
b) under the GNU GPL, with none of the additional permissions of
this License applicable to that copy.
3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material from
a header file that is part of the Library. You may convey such object
code under terms of your choice, provided that, if the incorporated
material is not limited to numerical parameters, data structure
layouts and accessors, or small macros, inline functions and templates
(ten or fewer lines in length), you do both of the following:
a) Give prominent notice with each copy of the object code that the
Library is used in it and that the Library and its use are
covered by this License.
b) Accompany the object code with a copy of the GNU GPL and this license
document.
4. Combined Works.
You may convey a Combined Work under terms of your choice that,
taken together, effectively do not restrict modification of the
portions of the Library contained in the Combined Work and reverse
engineering for debugging such modifications, if you also do each of
the following:
a) Give prominent notice with each copy of the Combined Work that
the Library is used in it and that the Library and its use are
covered by this License.
b) Accompany the Combined Work with a copy of the GNU GPL and this license
document.
c) For a Combined Work that displays copyright notices during
execution, include the copyright notice for the Library among
these notices, as well as a reference directing the user to the
copies of the GNU GPL and this license document.
d) Do one of the following:
0) Convey the Minimal Corresponding Source under the terms of this
License, and the Corresponding Application Code in a form
suitable for, and under terms that permit, the user to
recombine or relink the Application with a modified version of
the Linked Version to produce a modified Combined Work, in the
manner specified by section 6 of the GNU GPL for conveying
Corresponding Source.
1) Use a suitable shared library mechanism for linking with the
Library. A suitable mechanism is one that (a) uses at run time
a copy of the Library already present on the user's computer
system, and (b) will operate properly with a modified version
of the Library that is interface-compatible with the Linked
Version.
e) Provide Installation Information, but only if you would otherwise
be required to provide such information under section 6 of the
GNU GPL, and only to the extent that such information is
necessary to install and execute a modified version of the
Combined Work produced by recombining or relinking the
Application with a modified version of the Linked Version. (If
you use option 4d0, the Installation Information must accompany
the Minimal Corresponding Source and Corresponding Application
Code. If you use option 4d1, you must provide the Installation
Information in the manner specified by section 6 of the GNU GPL
for conveying Corresponding Source.)
5. Combined Libraries.
You may place library facilities that are a work based on the
Library side by side in a single library together with other library
facilities that are not Applications and are not covered by this
License, and convey such a combined library under terms of your
choice, if you do both of the following:
a) Accompany the combined library with a copy of the same work based
on the Library, uncombined with any other library facilities,
conveyed under the terms of this License.
b) Give prominent notice with the combined library that part of it
is a work based on the Library, and explaining where to find the
accompanying uncombined form of the same work.
6. Revised Versions of the GNU Lesser General Public License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Lesser General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the
Library as you received it specifies that a certain numbered version
of the GNU Lesser General Public License "or any later version"
applies to it, you have the option of following the terms and
conditions either of that published version or of any later version
published by the Free Software Foundation. If the Library as you
received it does not specify a version number of the GNU Lesser
General Public License, you may choose any version of the GNU Lesser
General Public License ever published by the Free Software Foundation.
If the Library as you received it specifies that a proxy can decide
whether future versions of the GNU Lesser General Public License shall
apply, that proxy's public statement of acceptance of any version is
permanent authorization for you to choose that version for the
Library.

56
Makefile.am
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# guile-fontconfig --- FFI bindings for FontConfig
# Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
#
# This file is part of guile-fontconfig.
#
# Guile-fontconfig is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 3 of
# the License, or (at your option) any later version.
#
# Guile-fontconfig is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with guile-fontconfig. If not, see
# <http://www.gnu.org/licenses/>.
GOBJECTS = $(SOURCES:%.scm=%.go)
nobase_mod_DATA = $(SOURCES) $(NOCOMP_SOURCES)
nobase_go_DATA = $(GOBJECTS)
# Make sure source files are installed first, so that the mtime of
# installed compiled files is greater than that of installed source
# files. See
# <http://lists.gnu.org/archive/html/guile-devel/2010-07/msg00125.html>
# for details.
guile_install_go_files = install-nobase_goDATA
$(guile_install_go_files): install-nobase_modDATA
CLEANFILES = $(GOBJECTS)
EXTRA_DIST = $(SOURCES) $(NOCOMP_SOURCES)
GUILE_WARNINGS = -Wunbound-variable -Warity-mismatch -Wformat
SUFFIXES = .scm .go
.scm.go:
$(AM_V_GEN)$(top_builddir)/pre-inst-env $(GUILE_TOOLS) compile $(GUILE_WARNINGS) -o "$@" "$<"
moddir=$(prefix)/share/guile/site/$(GUILE_EFFECTIVE_VERSION)
godir=$(libdir)/guile/$(GUILE_EFFECTIVE_VERSION)/site-ccache
SOURCES = \
fontconfig.scm \
fontconfig/bindings.scm \
fontconfig/config.scm \
fontconfig/object-set.scm \
fontconfig/pattern.scm
EXTRA_DIST += \
pre-inst-env.in \
README \
guix.scm \
examples/example.scm
.PHONY: publish

77
README
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-*- mode: org -*-
Guile-FontConfig provides Guile Scheme bindings for the FontConfig C
shared library. The bindings are written in pure Scheme by using
Guile's foreign function interface.
* Requirements
Guile-FontConfig currently depends on the following packages:
- GNU Guile >= 2.0.9
- FontConfig
- GNU Make
- GNU pkg-config
When building from a Git checkout, the following additional packages
are required:
- GNU Autoconf
- GNU Automake
- GNU Texinfo
* Installing
Guile-FontConfig uses the standard GNU build system, so installation
requires the usual incantations:
#+BEGIN_SRC sh
./configure
make
make install
#+END_SRC
When building from a Git checkout, the following spell is necessary
before running any of the above commands:
#+BEGIN_SRC sh
./bootstrap
#+END_SRC
GNU Guix users may install the current development snapshot
described in =guix.scm= with the following command:
#+BEGIN_SRC sh
guix package -f guix.scm
#+END_SRC
* Developing
To build the source code from a Git checkout, run the following:
#+BEGIN_SRC sh
./bootstrap
./configure
make
#+END_SRC
To start a Guile REPL with a pre-configured load path for using
guile-fontconfig, use the =pre-inst-env= script:
#+BEGIN_SRC sh
./pre-inst-env guile
#+END_SRC
GNU Guix users may create a development environment with all of the
necessary dependencies by running the following command:
#+BEGIN_SRC sh
guix environment -l guix.scm
#+END_SRC
* Contact & Credits
Bug reports and patches may be sent to <nicolo@nixo.xyz>.
This repository and this library is based on David Thomson's
Guile-SDL2, available [[https://dthompson.us/projects/guile-sdl2.html][here]] and distributed under GNU LGPLv3+.

3
bootstrap
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#!/bin/sh
autoreconf -vif

44
configure.ac
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# -*- Autoconf -*-
#
# guile-fontconfig --- FFI bindings for FontConfig
# Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
#
# This file is part of guile-fontconfig.
#
# Guile-fontconfig is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 3 of
# the License, or (at your option) any later version.
#
# Guile-fontconfig is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with guile-fontconfig. If not, see
# <http://www.gnu.org/licenses/>.
AC_INIT(guile-fontconfig, 0.0.1)
AC_CONFIG_SRCDIR(fontconfig)
AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([color-tests -Wall -Wno-portability foreign])
AM_SILENT_RULES([yes])
AC_CONFIG_FILES([Makefile fontconfig/config.scm])
AC_CONFIG_FILES([pre-inst-env], [chmod +x pre-inst-env])
GUILE_PKG([3.0 2.2 2.0])
GUILE_PROGS
PKG_CHECK_MODULES([FONTCONFIG], [fontconfig])
PKG_CHECK_VAR([FONTCONFIG_LIBDIR], [fontconfig], [libdir])
AC_MSG_CHECKING([FONTCONFIG library path])
AS_IF([test "x$FONTCONFIG_LIBDIR" = "x"], [
AC_MSG_FAILURE([unable to find FontConfig library directory])
], [
AC_MSG_RESULT([$FONTCONFIG_LIBDIR])
])
AC_SUBST([FONTCONFIG_LIBDIR])
AC_OUTPUT

22
examples/example.scm
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(use-modules (fontconfig))
(let ((pattern (make-pattern
'((family "JuliaMono")))))
(map
(lambda (pat)
(format #t "
---------------------
Font located at: ~A
Style & Family: ~A ~A
Fc Match String: ~A
"
(pattern-get pat "file")
(pattern-get pat "style")
(pattern-get pat "family")
(pattern->format pat "%{=fcmatch}")))
(pattern-list pattern)))
(let ((pattern (make-pattern '())))
(format #t "There are a total of ~A fonts!\n" (length (pattern-list pattern))))
(display (make-pattern))

28
fontconfig.scm
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;;; guile-fontconfig --- FFI bindings for FontConfig
;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; This file is part of guile-fontconfig.
;;;
;;; Guile-fontconfig is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; Guile-fontconifg is distributed in the hope that it will be
;;; useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-fontconfig. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Code:
(define-module (fontconfig)
#:use-module (fontconfig pattern)
#:use-module (fontconfig object-set)
#:re-export (make-pattern
pattern-list pattern-get
pattern->string pattern->format
make-object-set))

114
fontconfig/bindings.scm
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;;; guile-fontconfig --- FFI bindings for FontConfig
;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; This file is part of guile-fontconfig.
;;;
;;; Guile-fontconfig is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; Guile-fontconfig is distributed in the hope that it will be
;;; useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-fontconfig. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Low-level FFI bindings.
;;
;;; Code:
(define-module (fontconfig bindings)
#:use-module (fontconfig config)
#:use-module (system foreign)
#:export (fontconfig-func
define-foreign
fontconfig-pattern-create fontconfig-pattern-destroy
fontconfig-object-set-destroy))
(define fontconfig-func
(let ((lib (dynamic-link %libfontconfig)))
(lambda (return-type function-name arg-types)
"Return a procedure for the foreign function FUNCTION-NAME in
the FontConfig shared library. That function must return a value of
RETURN-TYPE and accept arguments of ARG-TYPES."
(pointer->procedure return-type
(dynamic-func function-name lib)
arg-types))))
(define-syntax-rule (define-foreign name return-type func-name arg-types)
(define-public name
(fontconfig-func return-type func-name arg-types)))
;;;
;;; Initialization
;;;
(define-foreign fontconfig-init-load-config-and-fonts
'* "FcInitLoadConfigAndFonts" '())
(define-foreign fontconfig-finalize
void "FcFini" '())
;;;
;;; Version
;;;
(define-foreign fontconfig-get-version
int "FcGetVersion" '())
;;;
;;; Pattern
;;;
(define-foreign fontconfig-pattern-create
'* "FcPatternCreate" '())
(define fontconfig-pattern-destroy
(dynamic-func "FcPatternDestroy" (dynamic-link %libfontconfig)))
(define-foreign fontconfig-pattern-add-string
int "FcPatternAddString" '(* * *))
(define-foreign fontconfig-pattern-add-double
int "FcPatternAddDouble" `(* * ,double))
(define-foreign fontconfig-pattern-add-integer
int "FcPatternAddInteger" `(* * ,int))
(define-foreign fontconfig-pattern-add-bool
int "FcPatternAddBool" `(* * ,int))
(define-foreign fontconfig-name-unparse
'* "FcNameUnparse" '(*))
(define-foreign fontconfig-pattern-format
'* "FcPatternFormat" '(* *))
;; FcResult (FcPattern *p, const char *object, int id, FcValue *v);
(define-foreign fontconfig-pattern-get
int "FcPatternGet" `(* * ,int *))
;;;
;;; Object Set
;;;
(define-foreign fontconfig-object-set-create
'* "FcObjectSetCreate" '())
(define-foreign fontconfig-object-set-add
int "FcObjectSetAdd" '(* *))
(define-foreign fontconfig-font-list
'* "FcFontList" '(* * *))
(define fontconfig-object-set-destroy
(dynamic-func "FcObjectSetDestroy" (dynamic-link %libfontconfig)))

24
fontconfig/config.scm
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;;; guile-fontconfig --- FFI bindings for FontConfig
;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; This file is part of guile-fontconfig.
;;;
;;; Guile-fontconfig is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; Guile-fontconfig is distributed in the hope that it will be
;;; useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-fontconfig. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (fontconfig config)
#:export (%libfontconfig))
(define %libfontconfig
"/gnu/store/y9fdy234r6hqiacd7hgwlmbdsngbp8p1-fontconfig-2.13.1/lib/libfontconfig.so")

24
fontconfig/config.scm.in
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;;; guile-fontconfig --- FFI bindings for FontConfig
;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; This file is part of guile-fontconfig.
;;;
;;; Guile-fontconfig is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; Guile-fontconfig is distributed in the hope that it will be
;;; useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-fontconfig. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (fontconfig config)
#:export (%libfontconfig))
(define %libfontconfig
"@FONTCONFIG_LIBDIR@/libfontconfig.so")

40
fontconfig/object-set.scm
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;;; guile-fontconfig --- FFI bindings for FontConfig
;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; This file is part of guile-fontconfig.
;;;
;;; Guile-fontconfig is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; Guile-fontconfig is distributed in the hope that it will be
;;; useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-fontconfig. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (fontconfig object-set)
#:use-module ((fontconfig bindings) #:prefix ffi:)
#:use-module (system foreign)
#:export (make-object-set
unwrap-object-set
object-set-add!))
(define-wrapped-pointer-type <object-set>
object-set?
wrap-object-set unwrap-object-set
(lambda (pattern port)
(format port "#<object-set>")))
(define (make-object-set)
(let* ((ptr (ffi:fontconfig-object-set-create))
(object-set (wrap-object-set ptr)))
(set-pointer-finalizer! ptr ffi:fontconfig-object-set-destroy)
object-set))
(define (object-set-add! os attr)
(ffi:fontconfig-object-set-add (unwrap-object-set os) (string->pointer attr)))

156
fontconfig/pattern.scm
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;;; guile-fontconfig --- FFI bindings for FontConfig
;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; This file is part of guile-fontconfig.
;;;
;;; Guile-fontconfig is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; Guile-fontconfig is distributed in the hope that it will be
;;; useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-fontconfig. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (fontconfig pattern)
#:use-module (ice-9 match)
#:use-module ((fontconfig bindings) #:prefix ffi:)
#:use-module (fontconfig object-set)
#:use-module (rnrs bytevectors)
#:use-module (srfi srfi-26)
#:use-module (system foreign)
#:export (make-pattern
pattern-get
pattern-list pattern->string pattern->format))
(define %string-attrs
'(family
style foundry file lang
fullname familylang stylelang fullnamelang
compatibility fontformat fontfeatures namelang
prgname hash postscriptname))
(define %double-attrs
'(size aspect pixelsize scale dpi))
(define %integer-attrs
'(slant weight spacing hintstyle width index rgba fontversion lcdfilter))
(define %bool-attrs
'(antialias
histing verticallayout autohint outline scalable
minspace embolden embeddedbitmap decorative))
(define-wrapped-pointer-type <pattern>
pattern?
wrap-pattern unwrap-pattern
(lambda (pattern port) (format port "#<pattern>")))
(define symbol->pointer
(compose string->pointer symbol->string))
(define (pattern-add-string pattern attr value)
(ffi:fontconfig-pattern-add-string
(unwrap-pattern pattern) (symbol->pointer attr) (string->pointer value)))
(define (pattern-add-double pattern attr value)
(ffi:fontconfig-pattern-add-double
(unwrap-pattern pattern) (symbol->pointer attr) value))
(define (pattern-add-integer pattern attr value)
(ffi:fontconfig-pattern-add-integer
(unwrap-pattern pattern) (symbol->pointer attr) value))
(define (pattern-add-bool pattern attr value)
(ffi:fontconfig-pattern-add-bool
(unwrap-pattern pattern) (symbol->pointer attr) (if value 1 0)))
(define* (make-pattern #:optional (args '()))
(define bool? (cute member <> %bool-attrs))
(define int? (cute member <> %integer-attrs))
(define double? (cute member <> %double-attrs))
(define string? (cute member <> %string-attrs))
(let* ((ptr (ffi:fontconfig-pattern-create))
(pattern
(if (null-pointer? ptr)
(error "make-pattern" "failed to create pattern")
(wrap-pattern ptr))))
(set-pointer-finalizer! ptr ffi:fontconfig-pattern-destroy)
(map (lambda (args)
(apply (match args
(((? bool? attr) value) pattern-add-bool)
(((? int? attr) value) pattern-add-integer)
(((? double? attr) value) pattern-add-double)
(((? string? attr) value) pattern-add-string))
pattern args))
args)
pattern))
(define (font-list pattern os)
(ffi:fontconfig-font-list
%null-pointer (unwrap-pattern pattern) (unwrap-object-set os)))
(define (char*->pointer pointer offset)
(dereference-pointer
(bytevector->pointer
(pointer->bytevector pointer int (* int offset)))))
(define (pattern->string pattern)
(pointer->string
(ffi:fontconfig-name-unparse (unwrap-pattern pattern))))
(define (make-font-list nfont sfont fonts)
(map (compose wrap-pattern (cute char*->pointer fonts <>))
(iota nfont)))
;; https://www.freedesktop.org/software/fontconfig/fontconfig-devel/fcpatternformat.html
(define* (pattern->format pattern #:optional (format "%{=fclist}"))
(let ((ptr (ffi:fontconfig-pattern-format
(unwrap-pattern pattern) (string->pointer format))))
(if (null-pointer? ptr)
(error "pattern->format" "invalid format")
(pointer->string ptr))
;; FIXME: How to FREE ptr!
))
(define %fc-types
'(fc-unknown ; -1
fc-void
fc-integer
fc-double
fc-string
fc-bool
fc-matrix
fc-charset
fc-ftface
fc-langset
fc-range))
(define (int->fc-type int)
(list-ref %fc-types (1+ int)))
(define (fontconfig-value ptr)
(match-let* (((type ptr) (parse-c-struct ptr `(,int *)))
(type (int->fc-type type)))
(match type
;; Other types are not implemented
('fc-void *unspecified*)
('fc-string (pointer->string ptr))
(_ (error "fontconfig-value" "NOT IMPLEMENTED YET!")))))
(define (pattern-get pattern attr)
(let ((out (bytevector->pointer (make-bytevector (* int 2)))))
(ffi:fontconfig-pattern-get
(unwrap-pattern pattern) (string->pointer attr) 0 out)
(fontconfig-value out)))
(define (pointer->font-list ptr)
(apply make-font-list (parse-c-struct ptr `(,int ,int *))))
(define (pattern-list pattern)
(let ((os (make-object-set)))
(for-each (cute object-set-add! os <>)
'("family" "style" "file"))
(pointer->font-list (font-list pattern os))))

92
guix.scm
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@ -0,0 +1,92 @@
;;; guile-fontconfig --- FFI bindings for FontConfig
;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; This file is part of guile-fontconfig.
;;;
;;; Guile-fontconfig is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; Guile-fontconfig is distributed in the hope that it will be
;;; useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-fontconfig. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; GNU Guix development package. To build and install, run:
;;
;; guix package -f guix.scm
;;
;; To use as the basis for a development environment, run:
;;
;; guix environment -l guix.scm
;;
;;; Code:
(use-modules (ice-9 match)
(ice-9 popen)
(ice-9 rdelim)
(srfi srfi-1)
(srfi srfi-26)
(guix gexp)
(guix packages)
(guix licenses)
(guix git-download)
(guix build-system gnu)
((guix build utils) #:select (with-directory-excursion))
(gnu packages)
(gnu packages autotools)
(gnu packages guile)
(gnu packages pkg-config)
(gnu packages fontutils)
(gnu packages texinfo))
(define %source-dir (dirname (current-filename)))
(define git-file?
(let* ((pipe (with-directory-excursion %source-dir
(open-pipe* OPEN_READ "git" "ls-files")))
(files (let loop ((lines '()))
(match (read-line pipe)
((? eof-object?)
(reverse lines))
(line
(loop (cons line lines))))))
(status (close-pipe pipe)))
(lambda (file stat)
(match (stat:type stat)
('directory #t)
((or 'regular 'symlink)
(any (cut string-suffix? <> file) files))
(_ #f)))))
(package
(name "guile-fontconfig")
(version "0.0.1")
(source (local-file %source-dir #:recursive? #t #:select? git-file?))
(build-system gnu-build-system)
(arguments
'(#:make-flags '("GUILE_AUTO_COMPILE=0")
#:phases
(modify-phases %standard-phases
(add-after 'unpack 'bootstrap
(lambda _ (zero? (system* "sh" "bootstrap")))))))
(native-inputs
`(("autoconf" ,autoconf)
("automake" ,automake)
("pkg-config" ,pkg-config)
("texinfo" ,texinfo)))
(inputs
`(("guile" ,guile-3.0)
("fontconfig" ,fontconfig)))
(synopsis "Guile bindings for FontConfig")
(description "Guile-fontconfig provides pure Guile Scheme bindings to the
FontConfig C shared library via the foreign function interface.")
(home-page "")
(license lgpl3+))

32
pre-inst-env.in
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@ -0,0 +1,32 @@
#!/bin/sh
# guile-fontconfig --- FFI bindings for FONTCONFIG
# Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
#
# This file is part of guile-fontconfig.
#
# Guile-fontconfig is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 3 of
# the License, or (at your option) any later version.
#
# Guile-fontconfig is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with guile-fontconfig. If not, see
# <http://www.gnu.org/licenses/>.
abs_top_srcdir="`cd "@abs_top_srcdir@" > /dev/null; pwd`"
abs_top_builddir="`cd "@abs_top_builddir@" > /dev/null; pwd`"
GUILE_LOAD_COMPILED_PATH="$abs_top_builddir${GUILE_LOAD_COMPILED_PATH:+:}$GUILE_LOAD_COMPILED_PATH"
GUILE_LOAD_PATH="$abs_top_builddir:$abs_top_srcdir${GUILE_LOAD_PATH:+:}:$GUILE_LOAD_PATH"
export GUILE_LOAD_COMPILED_PATH GUILE_LOAD_PATH
PATH="$abs_top_builddir/scripts:$PATH"
export PATH
exec "$@"
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