Re: [Gimp-user] reading from txt file
Hi. charlysangel (for...@gimpusers.com) wrote: > I've tried to read from file with code below > > (let* ((fd (fopen filename))) >(let*( > (c (fread 1 fd)) > (res "") > ) >(while (and c (not (equal? c " "))) > (set! res (string-append res c)) > (set! c (fread 1 fd))) > (if (equal? res "") > () > (cons (string->number res) ()) > ) >) >(gimp-message (string-append "PosX: " (number->string res))) > ) > > I do not understand why it returns :"Error: eval: unbound variable: res " The inner let*-Block declaring the "res" variable is closed in the line immediately before the gimp-message call. Hence "res" is no longer available when evaluating the line with gimp-message, resulting in the error message you see. Bye, Simon -- si...@budig.de http://simon.budig.de/ ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] reading from txt file
On Mon, 08 Jul 2019 10:32:54 +0200 charlysangel wrote: > Hi ! > > I want to create a multi-layer file by reading from a txt file x/y position > and image name. > > I've tried to read from file with code below > > (let* ((fd (fopen filename))) > (let* ( > (c (fread 1 fd)) > (res "") > ) > (while (and c (not (equal? c " "))) > (set! res (string-append res c)) > (set! c (fread 1 fd))) > (if (equal? res "") > () > (cons (string->number res) ()) > ) > ) > (gimp-message (string-append "PosX: " (number->string > res))) ) > > I do not understand why it returns :"Error: eval: unbound variable: res " > > Could you help, please ? > > Hi! Perhaps use python instead of scheme and use line-based i/o and https://github.com/shlomif/Freenode-programming-channel-FAQ/blob/master/FAQ_with_ToC__generated.md#where-can-i-learn-to-write-andor-read-regular-expressions instead of byte by byte read. -- - Shlomi Fish http://www.shlomifish.org/ UNIX Fortune Cookies - http://www.shlomifish.org/humour/fortunes/ In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move. — https://en.wikiquote.org/wiki/The_Hitchhiker's_Guide_to_the_Galaxy Please reply to list if it's a mailing list post - http://shlom.in/reply . ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
[Gimp-user] ghost outline
>Newbie here. When removing background from black and white line art, >there remains a thin white ghost outline around the black object. >Really shows up when a color background layer is below. Especially a >problem as I want to use as a logo. Cannot find any tutorials on this >except as removing foreground image in photo. All to do with anti-aliasing. Assuming you are using Windows and Gimp 2.10 You have an alpha channel on your xcf but only one layer. Since B & W line art assuming a colour select on the white and a delete might give something like screenshot 1 You can mess around with the threshold value but the usual way is grow the selection by 1 (or 2) pixel(s) to include the semi-transparent pixels before deleting. Select menu -> Grow. screenshot 2 With Gimp 2.10 the color 2 alpha tool Color menu -> Color to Alpha is adjustable and should give a good result. screenshot 3 A more comprehensive description here: https://www.gimp-forum.net/Thread-Background-removal-or-replacement-on-text-logos-and-other-computer-graphics Attachments: * https://www.gimpusers.com/system/attachments/1210/original/01-remove.jpg * https://www.gimpusers.com/system/attachments/1211/original/02-remove.jpg * https://www.gimpusers.com/system/attachments/1212/original/03-remove.jpg -- rich404 (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
[Gimp-user] reading from txt file
Hi ! I want to create a multi-layer file by reading from a txt file x/y position and image name. I've tried to read from file with code below (let* ((fd (fopen filename))) (let* ( (c (fread 1 fd)) (res "") ) (while (and c (not (equal? c " "))) (set! res (string-append res c)) (set! c (fread 1 fd))) (if (equal? res "") () (cons (string->number res) ()) ) ) (gimp-message (string-append "PosX: " (number->string res))) ) I do not understand why it returns :"Error: eval: unbound variable: res " Could you help, please ? -- charlysangel (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
