El 04/02/15 a les 15:39, Pascal Obry ha escrit: Hi, Pascal.
Mistery solved. My fault, print module works Ok with the Epson SX445W The problem was that I was testing to print on it from Darktable using a downloaded calibration image, the "Smugmug calibration print", that has only 1400x1122 pixels. And the print module simply refuses to print it larger than 100mmx80mm With my own photos, at native camera's resolution, printing size is correct. ---------------------------- The following is a little off-topic, but explains my initial intention: I was testing the SX445W with this chart because I use it as an inexpensive BW dedicated printer, I have replaced the original color inks by MIS Ebony carbon pigment ink diluted to different levels, following the methods described by Paul Roark (www.paulroark.com/BW-Info). I use this printer from GIMP applying to the BW images a custom curve in the blue chanel, to force the use of the magenta and cyan cartridges (both filled with medium gray ink) for midtones, and the yellow cartridge ( filled with ligh gray ink) for the highligts. After that I apply a lightness curve to correct the densities. I was hoping to do the same with darktable's print module ... but I have not found the way to apply my custom curve for the blue channel. Tone curves in darktable work in Lab space, and I don't know how to create such a curve in Lab...(end of the off-topic part) ----------------------------- So thanks, Pascal, the printer works fine. Josep V. Moragues > >> I have an isuue with another Epson printer, an A4 Epson SX-445W atached >> to the same computer (by WiFi) and using the Gutenprint driver. In this >> printer the prints from Darktable look ok, but they are a lot smaller >> than the size adjusted in Darktable. When I print to the same printer >> from GIMP, the image size is correct, > > Strange. > >> I need to investigate it further. But if you already have any clue about >> the possibly reason for this size difference, or the best way to debug >> it, I would appreciate very much any help. > > This looks like a wrong detection of the DPI for the printer. Please try > to print which darktable launched with: ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ darktable-devel mailing list darktable-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-devel
