sane-backends: make SCAN button work on Canon MG3200 series

Hi Antoine, I would like to add this small patch to make my scanner Canon PIXMA MG3250 work with the SCAN button. See: - https://gitlab.com/sane-project/backends/-/work_items/856 - https://gitlab.com/sane-project/backends/-/merge_requests/933 Index: Makefile =================================================================== RCS file: /cvs/ports/graphics/sane-backends/Makefile,v diff -u -p -u -r1.118 Makefile --- Makefile 1 Nov 2025 11:16:41 -0000 1.118 +++ Makefile 8 Jul 2026 10:02:31 -0000 @@ -3,7 +3,7 @@ BROKEN-alpha= ICE hp5590.c:1141: error: COMMENT= API for accessing scanners, backends V= 1.4.0 -REVISION= 2 +REVISION= 3 DISTNAME= backends-${V} PKGNAME= sane-${DISTNAME} Index: patches/patch-backend_pixma_pixma_mp150_c =================================================================== RCS file: patches/patch-backend_pixma_pixma_mp150_c diff -N patches/patch-backend_pixma_pixma_mp150_c --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-backend_pixma_pixma_mp150_c 8 Jul 2026 10:02:31 -0000 @@ -0,0 +1,30 @@ +PIXMA: decode SCAN button interrupt on MG3200 series (buf[4]) + +- https://gitlab.com/sane-project/backends/-/work_items/856 +- https://gitlab.com/sane-project/backends/-/merge_requests/933 + +Index: backend/pixma/pixma_mp150.c +--- backend/pixma/pixma_mp150.c.orig ++++ backend/pixma/pixma_mp150.c +@@ -1049,6 +1049,21 @@ handle_interrupt (pixma_t * s, int timeout) + s->events = PIXMA_EV_BUTTON1 | (buf[0x13] & 0x0f); + } + } ++ else if (s->cfg->pid == MG3200_PID) ++ /* MG3200 series: SCAN is the only button reported; flag in buf[4]. ++ * buf[3] & 1 is a clock request as in the default branch. */ ++ { ++ if (buf[3] & 1) ++ /* FIXME: This function makes trouble with a lot of scanners ++ send_time (s); ++ */ ++ PDBG (pixma_dbg (1, "WARNING:send_time() disabled!\n")); ++ if (buf[4] & 1) ++ { ++ /* start scan */ ++ s->events = PIXMA_EV_BUTTON1; ++ } ++ } + else + /* button no. in buf[0] + * original in buf[0] -- Regards, Mikolaj