From 3853fb03cbd15ab84a6744cb8f65231e5702b0e1 Mon Sep 17 00:00:00 2001
From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Date: Thu, 6 Feb 2020 00:13:06 -0500
Subject: [PATCH 14/14] gnu: WIP: Add libdepixelize.

WIP: This currently fails to build.  We need to figure out which ancient
version of lib2geom it needs to link against.

* gnu/packages/graphics.scm (libdepixelize): New variable.
---
 gnu/packages/graphics.scm | 67 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)

diff --git a/gnu/packages/graphics.scm b/gnu/packages/graphics.scm
index 208e2a521c..d27440dfea 100644
--- a/gnu/packages/graphics.scm
+++ b/gnu/packages/graphics.scm
@@ -71,6 +71,7 @@
   #:use-module (gnu packages photo)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages plotutils)
+  #:use-module (gnu packages popt)
   #:use-module (gnu packages pth)
   #:use-module (gnu packages pulseaudio)  ; libsndfile, libsamplerate
   #:use-module (gnu packages python)
@@ -87,6 +88,7 @@
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system python)
   #:use-module (guix download)
+  #:use-module (guix bzr-download)
   #:use-module (guix git-download)
   #:use-module (guix hg-download)
   #:use-module ((guix licenses) #:prefix license:)
@@ -465,6 +467,71 @@ basic geometries.")
       ;; and https://gitlab.com/inkscape/inkscape/issues/784).
       (license license:gpl3+))))
 
+;;; This older version of 2geom is used by libpixelize.
+(define-public lib2geom-0.9
+  (package
+    (inherit lib2geom)
+    (name "lib2geom")
+    (version "0.9")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://gitlab.com/inkscape/lib2geom.git")
+                    (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1zfb9mkggn36pxyp04z67dvj7r0vqfdw8yy2a41zg7rlcw5v6v67"))
+              (modules '((guix build utils)))
+              (snippet
+               '(begin
+                  (delete-file-recursively "src/googletest")
+                  ;; Fix py2geom module initialization (see:
+                  ;; https://gitlab.com/inkscape/lib2geom/merge_requests/18).
+                  (substitute* "src/py2geom/__init__.py"
+                    (("_py2geom") "py2geom._py2geom"))
+                  ;; Disable toys and tests, as they cause build issues.
+                  (substitute* "src/CMakeLists.txt"
+                    ((".*ADD_SUBDIRECTORY \\(.*tests\\).*") "")
+                    ((".*ADD_SUBDIRECTORY \\(toys\\).*") "")
+                    ((".*gtest.*") ""))
+                  #t))))))
+
+(define-public libdepixelize
+  (let ((revision "187")                ;no tags or official releases
+        (guix-revision "1"))
+    (package
+      (name "libdepixelize")
+      (version (string-append "0.0.0-" guix-revision "." revision))
+      (source (origin
+                (method bzr-fetch)
+                (uri (bzr-reference
+                      (url (string-append "lp:" name))
+                      (revision revision)))
+                (file-name (string-append name "-" version "-checkout"))
+                (sha256
+                 (base32
+                  "19znvam2d2bya05d9sxcj37lnrnvj9c0403aa2p5fv60985xi5b9"))))
+      (build-system cmake-build-system)
+      (arguments
+       `(#:phases (modify-phases %standard-phases
+                    (add-after 'unpack 'patch-sources
+                      (lambda _
+                        (substitute* "src/priv/splines-kopf2011.h"
+                          ((".*dest\\.pathVector\\.reserve.*") ""))
+                        #t)))))
+      (native-inputs `(("pkg-config" ,pkg-config)))
+      (inputs `(("gtkmm" ,gtkmm-2)
+                ("lib2geom" ,lib2geom-0.9)
+                ("popt" ,popt)))
+      (home-page "https://launchpad.net/libdepixelize")
+      (synopsis "C++ library for vectorizing raster graphics")
+      (description "Depixelize is a library (and utility) for converting
+raster graphics into vector graphics.  It implements the algorithm described in
+@url{https://johanneskopf.de/publications/pixelart/paper/pixel.pdf,Depixelizing
+Pixel Art}.")
+      (license (list license:gpl2+ license:lgpl2.1+))))) ;dual licensed
+
 (define-public pstoedit
   (package
     (name "pstoedit")
-- 
2.26.2