From eeb2e3b9917dad4147915f6e3bfa60bc5d89e2b9 Mon Sep 17 00:00:00 2001 From: Henning Geinitz Date: Tue, 23 Sep 2003 15:03:01 +0000 Subject: [PATCH] Added description of twain to sane bridge. --- twain-to-sane-bridge.txt | 68 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 twain-to-sane-bridge.txt diff --git a/twain-to-sane-bridge.txt b/twain-to-sane-bridge.txt new file mode 100644 index 00000000..fd03e5fe --- /dev/null +++ b/twain-to-sane-bridge.txt @@ -0,0 +1,68 @@ + +Hello, + + I have, for personal reasons, had to invest some time into getting SANE +network scanning to work for Windows clients. +WinSane would not work for me, it crashed every time. + +I attach the result, which is a TWAIN data source that can access SANE +backends. Unlike WinSane, this one is open source! +It works quite well on my SnapScan e20, other's mileage may vary. It's all +in German, too, but there isn't much text, so translation should be easy. +I would encourage anyone willing to do some work on it, to make it into the +universal tool it could be. I don't have time to do further development on +it. + +Now, here's the legal bit: +The code included is in part written by others: +The TWAIN driver skeleton is from the Twain Working Group, and copyrights +may apply. +Some of the image manipulation is from liblug, which is included as part of +the source tree. It is open source, requiring only the copyright to be +present in the source code. +Part, of course, is SANE stuff itself. +It uses the scanimg.exe binary from WinSane, so that needs to be present. +All other code is mine, and can be copied, developed and deployed as anyone +may see fit. I would however like to have it evolve into a standard frontend +for Windows scanning via SANE. + +Features are: Preview scan, zoom preview, selection of resolution and color +depth, image adjustments (gamma, brightness, sharpen, blur) and transfer via +file, memory and Windows native mode. +This is by no means clean code, much is redundant, useless or inefficient. +Be welcome to make any changes to improve it. +In scanner.c, the SANE backend is hardcoded. That would need to be changed +first, I'd guess. +Gray scaled bitmaps are transferred to the application as RGB. This is +needed because Corel Photo Paint and CorelDraw will not work when paletted +images are transferred, God only knows why. +Because of that, there is a lot of hard to understand code in scanner.c, but +that part is working perfectly, so it may be good to leave that alone at +first. +B/W scanning may need to take the PIXELFLAVOR setting into account, +currently is does not. + +To get it to build, you will need: +MSVC 6.0 Professional Edition +WinSane (for scanimg.exe and sanedll.dll) +The Twain Working Group driver skeleton (maybe) + +If you cannot compile without the Driver toolkit from Twain Working Group, +you will need to unzip the attached file in such a way that the "SANE +Driver" directory becomes a sibling of the Twain Working Group's driver +toolkit. Then, compile the toolkit version of the driver and delete the .ds +file from the c:windows\Twain_32\Sample directory. + +When compiling, a directory c:\twain will be created. There you will find +the data source (.ds) file. Place that in c:\windows\twain_32, along with +scanimg.exe and sanedll.dll. + +That should be all that's needed. + +I'm sorry I can't make this any easier, but I'm not an expert at Windows +application packaging. Maybe someone else can make a nicer package from it. + +Best regards, + +Mike +