New package: iscan-2.30.1 and related

This commit adds support for Epson scanners. It packages the iscan
application, the epkowa SANE backend, iscan-data, as well as the
scanner-specific plugin for the GT S650 (and by extension V19 and V39).
More scanner plugins may be added later when people request them.

iscan is unfree because it ships with a binary blob. sane-epkowa is
free, however, same as iscan-data. Scanner plugins are unfree again.

All unfree components are covered by the AVASYS license. Not only does
it allow distribution, it's also almost a free license. However, it
forbids reverse engineering the binary blobs.

The binary blobs make this x86/amd64-only packages. The epkowa backend
itself could technically be compiled for other architectures, but it's
not evident that it's worth the time. Most modern scanners need a
proprietary plugin.

srcpkgs/iscan-data/INSTALL

@@ -0,0 +1,5 @@
+case "${ACTION}" in
+    post)
+        /usr/lib/iscan-data/make-policy-file -m udev --template /usr/lib/udev/rules.d/*-sane.rules -o /usr/lib/udev/rules.d/99-epkowa.rules
+        ;;
+esac

srcpkgs/iscan-data/REMOVE

@@ -0,0 +1,5 @@
+case "${ACTION}" in
+    post)
+        rm /usr/lib/udev/rules.d/99-epkowa.rules
+        ;;
+esac

srcpkgs/iscan-data/template

@@ -0,0 +1,14 @@
+# Template file for 'iscan-data'
+pkgname=iscan-data
+version=1.36.0
+revision=1
+build_style=gnu-configure
+maintainer="Dominik Honnef <dominik@honnef.co>"
+hostmakedepends="libxslt"
+depends="sane-udev-rules"
+license="GPL-2"
+homepage="http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX"
+short_desc="EPSON Image Scan! data files"
+distfiles="https://download3.ebz.epson.net/dsc/f/03/00/03/61/59/646738a219f7354bf3268897385f6ce48c0776bf/${pkgname}_${version}-1.tar.gz"
+checksum=3a0a0075d0f7fcb0f482cbde2e74c9f6bee64268db32a4e6f470f1a6069117ba
+noarch=yes

srcpkgs/iscan-plugin-gt-s650/INSTALL

@@ -0,0 +1,6 @@
+if [ "$UPDATE" = "no" -a "$ACTION" = "post" ]; then
+	for id in 0x013c 0x013d; do
+		iscan-registry --add interpreter usb 0x04b8 $id \
+					   /usr/lib/iscan/libiscan-plugin-gt-s650 /usr/share/iscan/esfw010c.bin
+	done
+fi

srcpkgs/iscan-plugin-gt-s650/REMOVE

@@ -0,0 +1,9 @@
+if [ "$UPDATE" = "no" -a "$ACTION" = "pre" ]; then
+	# If we're removing sane-epkowa together with this package,
+	# there's no point (and no success) in calling iscan-registry
+	command -v iscan-registry >/dev/null 2>&1 || exit 0
+	for id in 0x013c 0x013d; do
+		iscan-registry --remove interpreter usb 0x04b8 $id \
+					   /usr/lib/iscan/libiscan-plugin-gt-s650 /usr/share/iscan/esfw010c.bin
+	done
+fi

srcpkgs/iscan-plugin-gt-s650/template

@@ -0,0 +1,27 @@
+# Template file for 'iscan-plugin-gt-s650'
+pkgname=iscan-plugin-gt-s650
+version=1.1.0
+revision=1
+repository=nonfree
+build_style=fetch
+maintainer="Dominik Honnef <dominik@honnef.co>"
+depends="sane-epkowa"
+license="AVASYS"
+homepage="http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX"
+short_desc="Epson scanner plugin for GT-S650, Epson Perfection V19 and Epson Perfection V39"
+_url="https://download3.ebz.epson.net/dsc/f/03/00/03/51/35/2bb85852bb07d419fa09653e76027ab61a7e0a95"
+if [ "$XBPS_MACHINE" = "x86_64" ]; then
+	_arch=amd64
+	checksum=442ca971cc0ebf71598047f41cb7e36eca0649eb62e324b91091360a63043df4
+else
+	_arch=i386
+	checksum=453004dcf8d6bf68feb1994acd14dbf3f774d49215013568eef6037e8de24643
+fi
+distfiles="${_url}/${pkgname}_${version}-2_${_arch}.deb"
+only_for_archs="i686 x86_64"
+
+do_install() {
+	ar x *.deb
+	tar -xvf data.tar.gz -C ${DESTDIR}
+	vlicense ${DESTDIR}/usr/share/doc/iscan-plugin-gt-s650/AVASYSPL.en.txt
+}

srcpkgs/iscan/patches/libpng15.patch

@@ -0,0 +1,48 @@
+--- lib/pngstream.cc	2011-12-01 02:30:53.000000000 +0100
++++ lib/pngstream.cc	2012-02-06 03:06:22.000000000 +0100
+@@ -83,7 +83,12 @@
+ #if HAVE_PNG_H
+     set_error_handler (_png, _info);
+ 
++/* when not interlacing (ie, only one pass), number of rows is image height:  _v_sz */
++#if PNG_LIBPNG_VER > 10499
++        if (!_footer && _v_sz == lib->get_current_row_number(_png))
++#else
+     if (_header && !_footer && _png->num_rows == _png->flush_rows)
++#endif
+       {
+         lib->write_end (_png, _info);
+         _footer = true;
+@@ -167,6 +172,9 @@
+     funcsym (write_row);
+     funcsym (write_flush);
+     funcsym (write_end);
++#if PNG_LIBPNG_VER > 10499
++    funcsym (get_current_row_number);
++#endif
+ 
+     if (lib->access_version_number
+         && lib->create_write_struct
+@@ -176,6 +184,9 @@
+         && lib->set_IHDR
+         && lib->set_pHYs
+         && lib->set_invert_mono
++#if PNG_LIBPNG_VER > 10499
++	&& lib->get_current_row_number
++#endif
+         && lib->write_info
+         && lib->write_row
+         && lib->write_flush
+--- lib/pngstream.hh	2011-12-01 02:30:53.000000000 +0100
++++ lib/pngstream.hh	2012-02-06 03:09:09.000000000 +0100
+@@ -108,6 +108,10 @@
+                png_structp);
+       fundecl (void, write_end,
+                png_structp, png_infop);
++#if PNG_LIBPNG_VER > 10499
++      fundecl (png_uint_32, get_current_row_number,
++               png_structp);
++#endif
+ #endif /* HAVE_PNG_H */
+     };
+     static png_lib_handle *lib;

srcpkgs/iscan/sane-epkowa.REMOVE

@@ -0,0 +1,3 @@
+if [ "$UPDATE" = "no" -a "$ACTION" = "post" ]; then
+	rm /var/lib/iscan/interpreter
+fi

srcpkgs/iscan/template

@@ -0,0 +1,41 @@
+# Template file for 'iscan'
+pkgname=iscan
+version=2.30.1
+revision=1
+repository=nonfree
+build_style=gnu-configure
+configure_args="--enable-frontend --enable-jpeg --enable-tiff --enable-png --enable-gimp"
+LDFLAGS="-ldl -lpng16"
+maintainer="Dominik Honnef <dominik@honnef.co>"
+hostmakedepends="pkg-config"
+makedepends="gtk+-devel gimp-devel libxml2-devel libjpeg-turbo-devel tiff-devel libltdl-devel libpng-devel sane-devel libusb-devel"
+depends="sane-epkowa"
+license="GPL-2, AVASYSPL"
+homepage="http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX"
+short_desc="EPSON Image Scan! front-end"
+distfiles="https://download3.ebz.epson.net/dsc/f/03/00/03/61/59/a3f8b8d60e8702a1c5bf3977d018cc2336e308a8/${pkgname}_${version}-1.tar.gz"
+checksum=79aa9a9f81a7146beb22a382bbaf840fbce61b1bdb82660e541946a471e48426
+only_for_archs="i686 x86_64"
+
+post_install() {
+	vlicense non-free/AVASYSPL.en.txt
+	vmkdir usr/lib/gimp/2.0/plug-ins
+	ln -s /usr/bin/iscan ${DESTDIR}/usr/lib/gimp/2.0/plug-ins
+}
+
+sane-epkowa_package() {
+	short_desc="SANE backend for EPSON scanners"
+	license="GPL-2"
+	unset repository
+	depends="sane iscan-data"
+	conf_files="/etc/sane.d/epkowa.conf"
+	pkg_install() {
+		vmkdir etc/sane.d/dll.d
+		echo epkowa > ${PKGDESTDIR}/etc/sane.d/dll.d/epkowa.conf
+		vmove usr/lib/sane
+		vmove usr/share/man/man5/sane-epkowa.5
+		vmove usr/bin/iscan-registry
+		vmove usr/share/man/man8/iscan-registry.8
+		vinstall backend/epkowa.conf 644 etc/sane.d/
+	}
+}

srcpkgs/sane-epkowa

@@ -0,0 +1 @@
+iscan