media-gfx/sane-backends: Fixes from Fedora and Debian...

They fix an important bug with Samsung devices not being properly recognized
and noises in some devices.

We also start disabling locking as all the other distributions and stop
trying to randomly generate extra documentation files that are not really
needed and add a lot of hidden dependencies tend to break in several ways.

Closes: https://bugs.gentoo.org/636202
Closes: https://bugs.gentoo.org/653300
Closes: https://bugs.gentoo.org/668232
Closes: https://bugs.gentoo.org/668350
Signed-off-by: Pacho Ramos <pacho@gentoo.org>
Package-Manager: Portage-2.3.51, Repoman-2.3.11

3 files changed, 775 insertions, 0 deletions

diff --git a/media-gfx/sane-backends/files/sane-backends-1.0.27-revert-samsung.patch b/media-gfx/sane-backends/files/sane-backends-1.0.27-revert-samsung.patch
new file mode 100644
index 000000000000..af3e141a010c
--- /dev/null
+++ b/media-gfx/sane-backends/files/sane-backends-1.0.27-revert-samsung.patch
@@ -0,0 +1,406 @@
+From 9b13d4c18b2424eaed02b72a928e9607921ec265 Mon Sep 17 00:00:00 2001
+From: Bernard Cafarelli <bernard.cafarelli@gmail.com>
+Date: Tue, 17 Apr 2018 22:43:15 +0200
+Subject: [PATCH] Revert "Color scanning for Samsung models, which support JPEG
+ Lossy compression."
+
+This reverts commit 926bfade544de4a4fd5f1a8082b85a97e2443770, leaving
+the new IDs in.
+As tracked in #315876, this breaks scanning with multiple Samsung scanners
+
+Conflicts:
+	backend/xerox_mfp.c
+	backend/xerox_mfp.h
+	doc/descriptions/xerox_mfp.desc
+---
+ backend/Makefile.am             |   2 +-
+ backend/Makefile.in             |   7 +-
+ backend/xerox_mfp.c             | 193 +-------------------------------
+ backend/xerox_mfp.h             |   5 -
+ doc/descriptions/xerox_mfp.desc |  10 +-
+ 5 files changed, 14 insertions(+), 203 deletions(-)
+
+diff --git a/backend/Makefile.am b/backend/Makefile.am
+index 18695a4a..3225b133 100644
+--- a/backend/Makefile.am
++++ b/backend/Makefile.am
+@@ -1086,7 +1086,7 @@ libxerox_mfp_la_CPPFLAGS = $(AM_CPPFLAGS) -DBACKEND_NAME=xerox_mfp
+ nodist_libsane_xerox_mfp_la_SOURCES = xerox_mfp-s.c
+ libsane_xerox_mfp_la_CPPFLAGS = $(AM_CPPFLAGS) -DBACKEND_NAME=xerox_mfp
+ libsane_xerox_mfp_la_LDFLAGS = $(DIST_SANELIBS_LDFLAGS)
+-libsane_xerox_mfp_la_LIBADD = $(COMMON_LIBS) libxerox_mfp.la ../sanei/sanei_init_debug.lo ../sanei/sanei_constrain_value.lo ../sanei/sanei_config.lo  sane_strstatus.lo @SANEI_SANEI_JPEG_LO@ $(JPEG_LIBS) ../sanei/sanei_usb.lo ../sanei/sanei_tcp.lo $(MATH_LIB) $(SOCKET_LIBS) $(USB_LIBS) $(RESMGR_LIBS)
++libsane_xerox_mfp_la_LIBADD = $(COMMON_LIBS) libxerox_mfp.la ../sanei/sanei_init_debug.lo ../sanei/sanei_constrain_value.lo ../sanei/sanei_config.lo  sane_strstatus.lo ../sanei/sanei_usb.lo ../sanei/sanei_tcp.lo $(MATH_LIB) $(SOCKET_LIBS) $(USB_LIBS) $(RESMGR_LIBS)
+ EXTRA_DIST += xerox_mfp.conf.in
+ 
+ libdll_preload_la_SOURCES =  dll.c
+diff --git a/backend/Makefile.in b/backend/Makefile.in
+index d1dca4a2..2643bb77 100644
+--- a/backend/Makefile.in
++++ b/backend/Makefile.in
+@@ -1430,10 +1430,9 @@ libsane_v4l_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
+ libsane_xerox_mfp_la_DEPENDENCIES = $(COMMON_LIBS) libxerox_mfp.la \
+ 	../sanei/sanei_init_debug.lo ../sanei/sanei_constrain_value.lo \
+ 	../sanei/sanei_config.lo sane_strstatus.lo \
+-	$(am__DEPENDENCIES_1) ../sanei/sanei_usb.lo \
+-	../sanei/sanei_tcp.lo $(am__DEPENDENCIES_1) \
++	../sanei/sanei_usb.lo ../sanei/sanei_tcp.lo \
+ 	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
+-	$(am__DEPENDENCIES_1)
++	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+ nodist_libsane_xerox_mfp_la_OBJECTS =  \
+ 	libsane_xerox_mfp_la-xerox_mfp-s.lo
+ libsane_xerox_mfp_la_OBJECTS = $(nodist_libsane_xerox_mfp_la_OBJECTS)
+@@ -2754,7 +2753,7 @@ libxerox_mfp_la_CPPFLAGS = $(AM_CPPFLAGS) -DBACKEND_NAME=xerox_mfp
+ nodist_libsane_xerox_mfp_la_SOURCES = xerox_mfp-s.c
+ libsane_xerox_mfp_la_CPPFLAGS = $(AM_CPPFLAGS) -DBACKEND_NAME=xerox_mfp
+ libsane_xerox_mfp_la_LDFLAGS = $(DIST_SANELIBS_LDFLAGS)
+-libsane_xerox_mfp_la_LIBADD = $(COMMON_LIBS) libxerox_mfp.la ../sanei/sanei_init_debug.lo ../sanei/sanei_constrain_value.lo ../sanei/sanei_config.lo  sane_strstatus.lo @SANEI_SANEI_JPEG_LO@ $(JPEG_LIBS) ../sanei/sanei_usb.lo ../sanei/sanei_tcp.lo $(MATH_LIB) $(SOCKET_LIBS) $(USB_LIBS) $(RESMGR_LIBS)
++libsane_xerox_mfp_la_LIBADD = $(COMMON_LIBS) libxerox_mfp.la ../sanei/sanei_init_debug.lo ../sanei/sanei_constrain_value.lo ../sanei/sanei_config.lo  sane_strstatus.lo ../sanei/sanei_usb.lo ../sanei/sanei_tcp.lo $(MATH_LIB) $(SOCKET_LIBS) $(USB_LIBS) $(RESMGR_LIBS)
+ libdll_preload_la_SOURCES = dll.c
+ libdll_preload_la_CPPFLAGS = $(AM_CPPFLAGS) -DBACKEND_NAME=dll -DENABLE_PRELOAD
+ libdll_la_SOURCES = dll.c
+diff --git a/backend/xerox_mfp.c b/backend/xerox_mfp.c
+index 8b8c8956..d37a6237 100644
+--- a/backend/xerox_mfp.c
++++ b/backend/xerox_mfp.c
+@@ -33,9 +33,6 @@
+ #include "../include/sane/sanei_usb.h"
+ #include "../include/sane/sanei_config.h"
+ #include "../include/sane/sanei_backend.h"
+-#ifdef HAVE_LIBJPEG
+-#include <jpeglib.h>
+-#endif
+ #include "xerox_mfp.h"
+ 
+ #define BACKEND_BUILD 13
+@@ -93,128 +90,6 @@ static char *str_cmd(int cmd)
+ }
+ 
+ #define MAX_DUMP 70
+-const char *encTmpFileName = "/tmp/stmp_enc.tmp";
+-
+-static int decompress(struct device __sane_unused__ *dev,
+-                      const char __sane_unused__ *infilename)
+-{
+-#ifdef HAVE_LIBJPEG
+-    int rc;
+-    int row_stride, width, height, pixel_size;
+-    struct jpeg_decompress_struct cinfo;
+-    struct jpeg_error_mgr jerr;
+-    unsigned long bmp_size = 0;
+-    FILE *pInfile = NULL;
+-    JSAMPARRAY buffer;
+-
+-    if ((pInfile = fopen(infilename, "rb")) == NULL) {
+-        fprintf(stderr, "can't open %s\n", infilename);
+-        return -1;
+-    }
+-
+-    cinfo.err = jpeg_std_error(&jerr);
+-
+-    jpeg_create_decompress(&cinfo);
+-
+-    jpeg_stdio_src(&cinfo, pInfile);
+-
+-    rc = jpeg_read_header(&cinfo, TRUE);
+-    if (rc != 1) {
+-        jpeg_destroy_decompress(&cinfo);
+-        fclose(pInfile);
+-        return -1;
+-    }
+-
+-    jpeg_start_decompress(&cinfo);
+-
+-    width = cinfo.output_width;
+-    height = cinfo.output_height;
+-    pixel_size = cinfo.output_components;
+-    bmp_size = width * height * pixel_size;
+-    dev->decDataSize = bmp_size;
+-
+-    row_stride = width * pixel_size;
+-
+-    buffer = (*cinfo.mem->alloc_sarray)
+-             ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
+-
+-    while (cinfo.output_scanline < cinfo.output_height) {
+-        buffer[0] = dev->decData + \
+-                    (cinfo.output_scanline) * row_stride;
+-        jpeg_read_scanlines(&cinfo, buffer, 1);
+-    }
+-    jpeg_finish_decompress(&cinfo);
+-    jpeg_destroy_decompress(&cinfo);
+-    fclose(pInfile);
+-    return 0;
+-#else
+-    return -1;
+-#endif
+-}
+-
+-static int copy_decompress_data(struct device *dev, unsigned char *pDest, int maxlen, int *destLen)
+-{
+-    int data_size = 0;
+-    size_t result = 0, retVal = 0;
+-
+-
+-    if (0 == dev->decDataSize) {
+-        *destLen = 0;
+-        return retVal;
+-    }
+-    data_size = dev->decDataSize - dev->currentDecDataIndex;
+-    if (data_size > maxlen) {
+-        data_size = maxlen;
+-    }
+-    memcpy(pDest, dev->decData+dev->currentDecDataIndex, data_size);
+-    result = data_size;
+-    *destLen = result;
+-    dev->currentDecDataIndex += result;
+-    retVal = result;
+-
+-    if (dev->decDataSize == dev->currentDecDataIndex) {
+-        dev->currentDecDataIndex = 0;
+-        dev->decDataSize = 0;
+-    }
+-
+-    return retVal;
+-}
+-
+-static int decompress_tempfile(struct device *dev)
+-{
+-    decompress(dev, encTmpFileName);
+-    remove(encTmpFileName);
+-    return 0;
+-}
+-
+-static int dump_to_tmp_file(struct device *dev)
+-{
+-    unsigned char *pSrc = dev->data;
+-    int srcLen = dev->datalen;
+-    FILE *pInfile;
+-    if ((pInfile = fopen(encTmpFileName, "a")) == NULL) {
+-        fprintf(stderr, "can't open %s\n", encTmpFileName);
+-        return 0;
+-    }
+-
+-    fwrite(pSrc, 1, srcLen, pInfile);
+-    fclose(pInfile);
+-    return srcLen;
+-}
+-
+-static int isSupportedDevice(struct device __sane_unused__ *dev)
+-{
+-#ifdef HAVE_LIBJPEG
+-    /* Checking device which supports JPEG Lossy compression for color scanning*/
+-    if (dev->compressionTypes & (1 << 6))
+-        return 1;
+-    else
+-        return 0;
+-#else
+-    return 0;
+-#endif
+-}
+-
+ static void dbg_dump(struct device *dev)
+ {
+     int i;
+@@ -639,11 +514,9 @@ static void set_parameters(struct device *dev)
+     dev->para.pixels_per_line = dev->win_width / px_to_len;
+     dev->para.bytes_per_line = dev->para.pixels_per_line;
+ 
+-    if (!isSupportedDevice(dev)) {
+ #if BETTER_BASEDPI
+-        px_to_len = 1213.9 / dev->val[OPT_RESOLUTION].w;
++	px_to_len = 1213.9 / dev->val[OPT_RESOLUTION].w;
+ #endif
+-    }
+     dev->para.lines = dev->win_len / px_to_len;
+     if (dev->composition == MODE_LINEART ||
+         dev->composition == MODE_HALFTONE) {
+@@ -765,13 +638,6 @@ static int dev_set_window(struct device *dev)
+     cmd[0x11] = (SANE_Byte)floor(dev->win_off_y);
+     cmd[0x12] = (SANE_Byte)((dev->win_off_y - floor(dev->win_off_y)) * 100);
+     cmd[0x13] = dev->composition;
+-    /* Set to JPEG Lossy Compression, if mode is color (only for supported model)...
+-     * else go with Uncompressed (For backard compatibility with old models )*/
+-    if (dev->composition == MODE_RGB24) {
+-        if (isSupportedDevice(dev)) {
+-            cmd[0x14] = 0x6;
+-        }
+-    }
+     cmd[0x16] = dev->threshold;
+     cmd[0x17] = dev->doc_source;
+ 
+@@ -843,7 +709,6 @@ dev_inquiry(struct device *dev)
+                       dev->res[0x3e] << 8 |
+                       dev->res[0x3f];
+     dev->line_order = dev->res[0x31];
+-    dev->compressionTypes = dev->res[0x32];
+     dev->doc_loaded = (dev->res[0x35] == 0x02) &&
+                       (dev->res[0x26] & 0x03);
+ 
+@@ -942,10 +807,6 @@ dev_free(struct device *dev)
+         free(UNCONST(dev->sane.type));
+     if (dev->data)
+         free(dev->data);
+-    if (dev->decData) {
+-        free(dev->decData);
+-        dev->decData = NULL;
+-    }
+     memset(dev, 0, sizeof(*dev));
+     free(dev);
+ }
+@@ -1283,19 +1144,6 @@ sane_read(SANE_Handle h, SANE_Byte *buf, SANE_Int maxlen, SANE_Int *lenp)
+     /* if there is no data to read or output from buffer */
+     if (!dev->blocklen && dev->datalen <= PADDING_SIZE) {
+ 
+-        /* copying uncompressed data */
+-        if (dev->composition == MODE_RGB24 &&
+-            isSupportedDevice(dev) &&
+-            dev->decDataSize > 0) {
+-            int diff = dev->total_img_size - dev->total_out_size;
+-            int bufLen = (diff < maxlen) ? diff : maxlen;
+-            if (0 < diff &&
+-                0 < copy_decompress_data(dev, buf, bufLen, lenp)) {
+-                dev->total_out_size += *lenp;
+-                return SANE_STATUS_GOOD;
+-            }
+-        }
+-
+         /* and we don't need to acquire next block */
+         if (dev->final_block) {
+             int slack = dev->total_img_size - dev->total_out_size;
+@@ -1311,10 +1159,7 @@ sane_read(SANE_Handle h, SANE_Byte *buf, SANE_Int maxlen, SANE_Int *lenp)
+                 /* this will never happen */
+                 DBG(1, "image overflow %d bytes\n", dev->total_img_size - dev->total_out_size);
+             }
+-            if (isSupportedDevice(dev) &&
+-                dev->composition == MODE_RGB24) {
+-                remove(encTmpFileName);
+-            }
++
+             /* that's all */
+             dev_stop(dev);
+             return SANE_STATUS_EOF;
+@@ -1365,18 +1210,9 @@ sane_read(SANE_Handle h, SANE_Byte *buf, SANE_Int maxlen, SANE_Int *lenp)
+ 
+         if (buf && lenp) { /* read mode */
+             /* copy will do minimal of valid data */
+-            if (dev->para.format == SANE_FRAME_RGB && dev->line_order) {
+-                if (isSupportedDevice(dev)) {
+-                    clrlen = dump_to_tmp_file(dev);
+-                    /* decompress after reading entire block data*/
+-                    if (0 == dev->blocklen) {
+-                        decompress_tempfile(dev);
+-                    }
+-                    copy_decompress_data(dev, buf, maxlen, &olen);
+-                } else {
+-                    clrlen = copy_mix_bands_trim(dev, buf, maxlen, &olen);
+-                }
+-            } else
++            if (dev->para.format == SANE_FRAME_RGB && dev->line_order)
++				clrlen = copy_mix_bands_trim(dev, buf, maxlen, &olen);
++            else
+                 clrlen = copy_plain_trim(dev, buf, maxlen, &olen);
+ 
+             dev->datalen -= clrlen;
+@@ -1455,9 +1291,6 @@ sane_start(SANE_Handle h)
+     if (!dev->data && !(dev->data = malloc(DATASIZE)))
+         return ret_cancel(dev, SANE_STATUS_NO_MEM);
+ 
+-    if (!dev->decData && !(dev->decData = malloc(POST_DATASIZE)))
+-        return ret_cancel(dev, SANE_STATUS_NO_MEM);
+-
+     if (!dev_acquire(dev))
+         return dev->state;
+ 
+@@ -1479,22 +1312,6 @@ sane_start(SANE_Handle h)
+ 
+     dev->total_img_size = dev->para.bytes_per_line * dev->para.lines;
+ 
+-    if (isSupportedDevice(dev) &&
+-        dev->composition == MODE_RGB24) {
+-	int fd;
+-        remove(encTmpFileName);
+-
+-	/* Precreate temporary file in exclusive mode. */
+-	fd = open(encTmpFileName, O_CREAT|O_EXCL, 0600);
+-	if (fd == -1) {
+-	    DBG(3, "%s: %p, can't create temporary file %s: %s\n", __func__,
+-		(void *)dev, encTmpFileName, strerror(errno));
+-	    return ret_cancel(dev, SANE_STATUS_ACCESS_DENIED);
+-	}
+-	close(fd);
+-    }
+-    dev->currentDecDataIndex = 0;
+-
+     return SANE_STATUS_GOOD;
+ }
+ 
+diff --git a/backend/xerox_mfp.h b/backend/xerox_mfp.h
+index 3d93f06d..ea89dda2 100644
+--- a/backend/xerox_mfp.h
++++ b/backend/xerox_mfp.h
+@@ -74,10 +74,6 @@ struct device {
+ #define DATATAIL(dev) ((dev->dataoff + dev->datalen) & DATAMASK)
+ #define DATAROOM(dev) dataroom(dev)
+ 
+-#define POST_DATASIZE 0xFFFFFF
+-    SANE_Byte *decData;
+-    int decDataSize;
+-    int currentDecDataIndex;
+     /* data from CMD_INQUIRY: */
+     int resolutions;		/* supported resolution bitmask */
+     int compositions;		/* supported image compositions bitmask */
+@@ -102,7 +98,6 @@ struct device {
+     int composition;		/* MODE_ */
+     int doc_source;		/* document source */
+     int threshold;		/* brightness */
+-    int compressionTypes;
+ 
+     /* CMD_READ data. It is per block only, image could be in many blocks */
+     int blocklen;			/* image data block len (padding incl.) */
+diff --git a/doc/descriptions/xerox_mfp.desc b/doc/descriptions/xerox_mfp.desc
+index d21a6be6..67253b38 100644
+--- a/doc/descriptions/xerox_mfp.desc
++++ b/doc/descriptions/xerox_mfp.desc
+@@ -320,7 +320,7 @@
+ 
+ :model "SCX-3405W"
+ :interface "Ethernet"
+-:status :good
++:status :basic
+ 
+ :model "SCX-3400"
+ :interface "USB"
+@@ -335,17 +335,17 @@
+ :model "SCX-4729FD"
+ :interface "USB"
+ :usbid "0x04e8" "0x3453"
+-:status :good
++:status :basic
+ 
+ :model "CLX-6260"
+ :interface "USB"
+ :usbid "0x04e8" "0x3455"
+-:status :good
++:status :minimal
+ 
+ :model "CLX-3300 Series"
+ :interface "USB"
+ :usbid "0x04e8" "0x3456"
+-:status :good
++:status :basic
+ 
+ :model "SCX-470x"
+ :interface "USB"
+@@ -355,7 +355,7 @@
+ :model "CLX-4190"
+ :interface "USB"
+ :usbid "0x04e8" "0x345a"
+-:status :good
++:status :minimal
+ 
+ :model "SCX-4650 4x21S Series"
+ :interface "USB"
+-- 
+2.17.0
+
diff --git a/media-gfx/sane-backends/files/sane-backends-1.0.27-uninitialized-variable.patch b/media-gfx/sane-backends/files/sane-backends-1.0.27-uninitialized-variable.patch
new file mode 100644
index 000000000000..0311975c0ce8
--- /dev/null
+++ b/media-gfx/sane-backends/files/sane-backends-1.0.27-uninitialized-variable.patch
@@ -0,0 +1,25 @@
+From dd61ef1cc84299781e382b9258d97102cee192b4 Mon Sep 17 00:00:00 2001
+From: Olaf Meeuwissen <paddy-hack@member.fsf.org>
+Date: Thu, 3 Aug 2017 18:50:05 +0900
+Subject: [PATCH] genesys: Fix use of uninitialized variable
+
+See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869673
+---
+ backend/genesys.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/backend/genesys.c b/backend/genesys.c
+index 1c1bbf4..0b644c4 100644
+--- a/backend/genesys.c
++++ b/backend/genesys.c
+@@ -6237,6 +6237,7 @@ attach (SANE_String_Const devname, Genesys_Device ** devp, SANE_Bool may_wait)
+   dev->model = genesys_usb_device_list[i].model;
+   dev->vendorId = genesys_usb_device_list[i].vendor;
+   dev->productId = genesys_usb_device_list[i].product;
++  dev->usb_mode = 0;            /* i.e. unset */
+   dev->already_initialized = SANE_FALSE;
+ 
+   DBG (DBG_info, "attach: found %s flatbed scanner %s at %s\n",
+-- 
+2.1.4
+
diff --git a/media-gfx/sane-backends/sane-backends-1.0.27-r2.ebuild b/media-gfx/sane-backends/sane-backends-1.0.27-r2.ebuild
new file mode 100644
index 000000000000..4ce3733007d1
--- /dev/null
+++ b/media-gfx/sane-backends/sane-backends-1.0.27-r2.ebuild
@@ -0,0 +1,344 @@
+# Copyright 1999-2018 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+inherit flag-o-matic multilib-minimal systemd toolchain-funcs udev user
+
+# gphoto and v4l are handled by their usual USE flags.
+# The pint backend was disabled because I could not get it to compile.
+IUSE_SANE_BACKENDS="
+	abaton
+	agfafocus
+	apple
+	artec
+	artec_eplus48u
+	as6e
+	avision
+	bh
+	canon
+	canon630u
+	canon_dr
+	canon_pp
+	cardscan
+	coolscan
+	coolscan2
+	coolscan3
+	dc210
+	dc240
+	dc25
+	dell1600n_net
+	dmc
+	epjitsu
+	epson
+	epson2
+	fujitsu
+	genesys
+	gt68xx
+	hp
+	hp3500
+	hp3900
+	hp4200
+	hp5400
+	hp5590
+	hpljm1005
+	hpsj5s
+	hs2p
+	ibm
+	kodak
+	kodakaio
+	kvs1025
+	kvs20xx
+	kvs40xx
+	leo
+	lexmark
+	ma1509
+	magicolor
+	matsushita
+	microtek
+	microtek2
+	mustek
+	mustek_pp
+	mustek_usb
+	mustek_usb2
+	nec
+	net
+	niash
+	p5
+	pie
+	pixma
+	plustek
+	plustek_pp
+	pnm
+	qcam
+	ricoh
+	rts8891
+	s9036
+	sceptre
+	sharp
+	sm3600
+	sm3840
+	snapscan
+	sp15c
+	st400
+	stv680
+	tamarack
+	teco1
+	teco2
+	teco3
+	test
+	u12
+	umax
+	umax1220u
+	umax_pp
+	xerox_mfp"
+
+IUSE="gphoto2 ipv6 snmp systemd threads usb v4l xinetd zeroconf"
+
+for backend in ${IUSE_SANE_BACKENDS}; do
+	case ${backend} in
+	# Disable backends that require parallel ports as no one has those anymore.
+	canon_pp|hpsj5s|mustek_pp|\
+	pnm)
+		IUSE+=" -sane_backends_${backend}"
+		;;
+	mustek_usb2|kvs40xx)
+		IUSE+=" sane_backends_${backend}"
+		;;
+	*)
+		IUSE+=" +sane_backends_${backend}"
+	esac
+done
+
+REQUIRED_USE="
+	sane_backends_mustek_usb2? ( threads )
+	sane_backends_kvs40xx? ( threads )
+"
+
+DESCRIPTION="Scanner Access Now Easy - Backends"
+HOMEPAGE="http://www.sane-project.org/"
+MY_P="${P}"
+FRS_ID="4224"
+SRC_URI="https://alioth.debian.org/frs/download.php/file/${FRS_ID}/${P}.tar.gz"
+
+LICENSE="GPL-2 public-domain"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~x86-fbsd ~amd64-linux ~x86-linux"
+
+RDEPEND="
+	sane_backends_dc210? ( >=virtual/jpeg-0-r2:0=[${MULTILIB_USEDEP}] )
+	sane_backends_dc240? ( >=virtual/jpeg-0-r2:0=[${MULTILIB_USEDEP}] )
+	sane_backends_dell1600n_net? (
+		>=virtual/jpeg-0-r2:0=[${MULTILIB_USEDEP}]
+		>=media-libs/tiff-3.9.7-r1:0=[${MULTILIB_USEDEP}]
+	)
+	sane_backends_canon_pp? ( >=sys-libs/libieee1284-0.2.11-r3[${MULTILIB_USEDEP}] )
+	sane_backends_hpsj5s? ( >=sys-libs/libieee1284-0.2.11-r3[${MULTILIB_USEDEP}] )
+	sane_backends_mustek_pp? ( >=sys-libs/libieee1284-0.2.11-r3[${MULTILIB_USEDEP}] )
+	usb? ( >=virtual/libusb-1-r1:1=[${MULTILIB_USEDEP}] )
+	gphoto2? (
+		>=media-libs/libgphoto2-2.5.3.1:=[${MULTILIB_USEDEP}]
+		>=virtual/jpeg-0-r2:0=[${MULTILIB_USEDEP}]
+	)
+	v4l? ( >=media-libs/libv4l-0.9.5[${MULTILIB_USEDEP}] )
+	xinetd? ( sys-apps/xinetd )
+	snmp? ( net-analyzer/net-snmp )
+	systemd? ( sys-apps/systemd:0= )
+	zeroconf? ( >=net-dns/avahi-0.6.31-r2[${MULTILIB_USEDEP}] )
+"
+
+DEPEND="${RDEPEND}
+	v4l? ( sys-kernel/linux-headers )
+	>=sys-devel/gettext-0.18.1
+	>=virtual/pkgconfig-0-r1[${MULTILIB_USEDEP}]
+"
+
+MULTILIB_CHOST_TOOLS=(
+	/usr/bin/sane-config
+)
+
+pkg_setup() {
+	enewgroup scanner
+	enewuser saned -1 -1 -1 scanner
+}
+
+src_prepare() {
+	default
+
+	cat >> backend/dll.conf.in <<-EOF
+	# Add support for the HP-specific backend.  Needs net-print/hplip installed.
+	hpaio
+	# Add support for the Epson-specific backend.  Needs media-gfx/iscan installed.
+	epkowa
+	EOF
+
+	eapply "${FILESDIR}"/${PN}-1.0.24-saned_pidfile_location.patch
+	eapply "${FILESDIR}"/${PN}-1.0.27-disable-usb-tests.patch
+
+	# From Arch
+	eapply "${FILESDIR}"/${PN}-1.0.27-network.patch
+
+	# From Fedora
+	# Fix https://bugs.gentoo.org/635348
+	eapply "${FILESDIR}"/${PN}-1.0.27-canon-lide-100.patch
+	# Fix https://bugs.gentoo.org/653300
+	eapply "${FILESDIR}"/${PN}-1.0.27-revert-samsung.patch
+
+	# From Debian
+	eapply "${FILESDIR}"/${PN}-1.0.27-uninitialized-variable.patch
+
+	# Fix for "make check".  Upstream sometimes forgets to update this.
+	local ver=$(./configure --version | awk '{print $NF; exit 0}')
+	sed -i \
+		-e "/by sane-desc 3.5 from sane-backends/s:sane-backends .*:sane-backends ${ver}:" \
+		testsuite/tools/data/html* || die
+}
+
+src_configure() {
+	append-flags -fno-strict-aliasing # From Fedora
+
+	# if LINGUAS is set, just use the listed and supported localizations.
+	if [[ ${LINGUAS+set} == "set" ]]; then
+		mkdir -p po || die
+		strip-linguas -u po
+		printf '%s\n' ${LINGUAS} > po/LINGUAS
+	fi
+
+	multilib-minimal_src_configure
+}
+
+multilib_src_configure() {
+	# the blank is intended - an empty string would result in building ALL backends.
+	local BACKENDS=" "
+
+	use gphoto2 && BACKENDS="gphoto2"
+	use v4l && BACKENDS="${BACKENDS} v4l"
+	for backend in ${IUSE_SANE_BACKENDS}; do
+		if use "sane_backends_${backend}" && [ ${backend} != pnm ]; then
+			BACKENDS="${BACKENDS} ${backend}"
+		fi
+	done
+
+	local myconf=(
+		$(use_with usb)
+		$(multilib_native_use_with snmp)
+	)
+
+	# you can only enable this backend, not disable it...
+	if use sane_backends_pnm; then
+		myconf+=( --enable-pnm-backend )
+	fi
+	if use sane_backends_mustek_pp; then
+		myconf+=( --enable-parport-directio )
+	fi
+	if ! { use sane_backends_canon_pp || use sane_backends_hpsj5s || use sane_backends_mustek_pp; }; then
+		myconf+=( sane_cv_use_libieee1284=no )
+	fi
+
+	# relative path must be used for tests to work properly
+	ECONF_SOURCE=${S} \
+	SANEI_JPEG="sanei_jpeg.o" SANEI_JPEG_LO="sanei_jpeg.lo" \
+	BACKENDS="${BACKENDS}" \
+	# All distributions pass --disable-locking because /var/lock/sane/ would be a world-writable directory
+	# --without-api-spec to not automagically depend on tons of stuff
+	# that break in many ways, bug #636202, #668232, #668350
+	# People can refer to the "Programmer's Documentation" at http://www.sane-project.org/docs.html
+	econf \
+		--disable-locking \
+		--without-api-spec \
+		$(use_with gphoto2) \
+		$(multilib_native_use_with systemd) \
+		$(use_with v4l) \
+		$(use_enable ipv6) \
+		$(use_enable threads pthread) \
+		$(use_enable zeroconf avahi) \
+		"${myconf[@]}"
+}
+
+multilib_src_compile() {
+	emake VARTEXFONTS="${T}/fonts"
+
+	if tc-is-cross-compiler; then
+		pushd "${BUILD_DIR}"/tools >/dev/null || die
+
+		# The build system sucks and doesn't handle this properly.
+		# https://alioth.debian.org/tracker/index.php?func=detail&aid=314236&group_id=30186&atid=410366
+		tc-export_build_env BUILD_CC
+		${BUILD_CC} ${BUILD_CPPFLAGS} ${BUILD_CFLAGS} ${BUILD_LDFLAGS} \
+			-I. -I../include -I"${S}"/include \
+			"${S}"/sanei/sanei_config.c "${S}"/sanei/sanei_constrain_value.c \
+			"${S}"/sanei/sanei_init_debug.c "${S}"/tools/sane-desc.c -o sane-desc || die
+		local dirs=( hal hotplug hotplug-ng udev )
+		local targets=(
+			hal/libsane.fdi
+			hotplug/libsane.usermap
+			hotplug-ng/libsane.db
+			udev/libsane.rules
+		)
+		mkdir -p "${dirs[@]}" || die
+		emake "${targets[@]}"
+
+		popd >/dev/null
+	fi
+
+	if use usb; then
+		sed -i -e '/^$/d' \
+			tools/hotplug/libsane.usermap || die
+	fi
+}
+
+multilib_src_install() {
+	emake INSTALL_LOCKPATH="" DESTDIR="${D}" install \
+		docdir="${EPREFIX}"/usr/share/doc/${PF}
+
+	if multilib_is_native_abi; then
+		if use usb; then
+			insinto /etc/hotplug/usb
+			doins tools/hotplug/libsane.usermap
+		fi
+
+		udev_newrules tools/udev/libsane.rules 41-libsane.rules
+		insinto "/usr/share/pkgconfig"
+		doins tools/sane-backends.pc
+	fi
+}
+
+multilib_src_install_all() {
+	keepdir /var/lib/lock/sane
+	fowners root:scanner /var/lib/lock/sane
+	fperms g+w /var/lib/lock/sane
+	dodir /etc/env.d
+
+	if use systemd; then
+		systemd_newunit "${FILESDIR}"/saned_at.service "saned@.service"
+		systemd_newunit "${FILESDIR}"/saned.socket saned.socket
+	fi
+
+	if use usb; then
+		exeinto /etc/hotplug/usb
+		doexe tools/hotplug/libusbscanner
+		newdoc tools/hotplug/README README.hotplug
+	fi
+
+	dodoc NEWS AUTHORS ChangeLog* PROBLEMS README README.linux
+	find "${D}" -name '*.la' -delete || die
+
+	if use xinetd; then
+		insinto /etc/xinetd.d
+		doins "${FILESDIR}"/saned
+	fi
+
+	newinitd "${FILESDIR}"/saned.initd saned
+	newconfd "${FILESDIR}"/saned.confd saned
+}
+
+pkg_postinst() {
+	if use xinetd; then
+		elog "If you want remote clients to connect, edit"
+		elog "/etc/sane.d/saned.conf and /etc/hosts.allow"
+	fi
+
+	if ! use systemd; then
+		elog "If you are using a USB scanner, add all users who want"
+		elog "to access your scanner to the \"scanner\" group."
+	fi
+}