node-twain

A nodejs library for TWAIN using node-addon-api.

NOTE: Project is under develop. PR is welcomed, any issue is welcomed.

Installation

$ npm install node-twain

Twain flow

Usage

import {twain} from "node-twain"

const app = new twain.TwainSDK( {
    productName: "productName!",
    productFamily: "productFamily!",
    manufacturer: "manufacturer!",
    version: {
        country: twain.TWCY_CHINA,
        language: twain.TWLG_CHINESE,
        majorNum: 1,
        minorNum: 1,
        info: "v0.0.1",
    }
})
const sources = app.getDataSources()            // ["PaperStream IP SP-1120N #2"]
const defaultSource = app.getDefaultSource()    // "PaperStream IP SP-1120N #2"
app.setDefaultSource(sources[0])    //set which scanner to work

await app.openDataSource(defaultSource) //args 

const enumTest = app.getCapability(twain.ICAP_XFERMECH)         // Enum
const oneValueTest = app.getCapability(twain.CAP_AUTHOR)        // one value
const rangeTest = app.getCapability(twain.ICAP_JPEGQUALITY)     // range
const arrayTest = app.getCapability(twain.CAP_SUPPORTEDCAPS)    // array

session.setCallback()
app.scan(twain.TWSX_FILE, fileName);  //fileName:Full path

Data Source Support

According to twain‘s github, Data Source Manager looks for data sources in

|OperaSystem|directory| |---|---| |windows|C:\Windows\twain_32 C:\Windows\twain_32| |Linux | /usr/local/lib/twain| |MacOS| /Library/Image Capture/TWAIN Data Sources|

Install your scanner driver and confirm whether your scanner support TWAIN or not.

License

MIT License. See the LICENSE file.

Setup Develop Environment

Windows

• Python is required for node-gyp is used to build package.

• Vitual Studio is required.

Steps

1. Confirm Twain Datasource Manage is supported. Checkout this directory:

C:\Windows\System32

If there is no file "TWAINDSM.dll", copy the "TWAINDSM.dll" file into the System32 directory.

2. Confirm the scanner driver is installed. For example, my scanner is SP-1120N.

PS: The scanner MUST support TWAIN protocal.

3. Run the test script

npm run test

This command will search *.test.js, then run the twain.test.js script.