-
Notifications
You must be signed in to change notification settings - Fork 26
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat(encoding): adds encoding support for ECI and input modes (#30)
Adds support for ECI mechanism and various input encoding modes. Adds graceful handling of invalid file types. Updates gaps in documentation. Adds option for specifying primary data.
- Loading branch information
Showing
21 changed files
with
487 additions
and
226 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| # EditorConfig helps developers define and maintain consistent | ||
| # coding styles between different editors and IDEs | ||
| # editorconfig.org | ||
|
|
||
| root = true | ||
|
|
||
|
|
||
| [*] | ||
|
|
||
| # Change these settings to your own preference | ||
| indent_style = space | ||
| indent_size = 2 | ||
|
|
||
| # We recommend you to keep these unchanged | ||
| end_of_line = lf | ||
| charset = utf-8 | ||
| trim_trailing_whitespace = true | ||
| insert_final_newline = true | ||
|
|
||
| [*.md] | ||
| trim_trailing_whitespace = false |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| # Encoding | ||
|
|
||
| By default, all input data is assumed to be encoded in Unicode (UTF-8) format. Many barcode symbologies encode data using Latin-1 ([ISO-8851-1](https://en.wikipedia.org/wiki/ISO/IEC_8859-1)) character encoding, which means the input data will be converted from Unicode to Latin-1 before being put in the symbol. [QR Code](../guide/symbologies/two-dimensional.md#qr-code-iso-18004), [Micro QR Code](../guide/symbologies/two-dimensional.md#micro-qr-code-iso-18004), [Han Xin Code](../guide/symbologies/two-dimensional.md#han-xin-code), and [Grid Matrix](../guide/symbologies/two-dimensional.md#grid-matrix) standards can encode Chinese or Japanese characters, which are also converted from Unicode. | ||
|
|
||
| If characters which can not be encoded using the default character encoding are encountered during render, the [Extended Channel Interpolation (ECI)](#extended-channel-interpolation-eci) method will be used to encode the data. | ||
|
|
||
| :::warning Important | ||
| Not all barcode readers support ECI mode, so using ECI can sometimes result in unreadable barcodes. If you are using characters beyond those supported by Latin-1, you should check that the resulting barcode can be understood by your target barcode reader. | ||
| ::: | ||
|
|
||
| ### Extended Channel Interpolation (ECI) | ||
|
|
||
| If you are passing in input data from file which is not encoded in UTF-8, you can specify the encoding using the `eci` option with the appropriate ECI code. | ||
|
|
||
| This procedure will add an ECI flag in the barcode data that tells the barcode reader to change character encoding. | ||
|
|
||
| :::tip Note | ||
| A warning message will be generated when ECI codes have been inserted into a symbol. | ||
| ::: | ||
|
|
||
| ### Available ECI Codes | ||
|
|
||
| The following is a list of available ECI codes: | ||
|
|
||
| | ECI Code | Character Encoding Scheme | | ||
| |----------|---------------------------------------------| | ||
| | 3 | ISO-8859-1 - Latin alphabet No. 1 (default) | | ||
| | 4 | ISO-8859-2 - Latin alphabet No. 2 | | ||
| | 5 | ISO-8859-3 - Latin alphabet No. 3 | | ||
| | 6 | ISO-8859-4 - Latin alphabet No. 4 | | ||
| | 7 | ISO-8859-5 - Latin/Cyrillic alphabet | | ||
| | 8 | ISO-8859-6 - Latin/Arabic alphabet | | ||
| | 9 | ISO-8859-7 - Latin/Greek alphabet | | ||
| | 10 | ISO-8859-8 - Latin/Hebrew alphabet | | ||
| | 11 | ISO-8859-9 - Latin alphabet No. 5 | | ||
| | 12 | ISO-8859-10 - Latin alphabet No. 6 | | ||
| | 13 | ISO-8859-11 - Latin/Thai alphabet | | ||
| | 15 | ISO-8859-13 - Latin alphabet No. 7 | | ||
| | 16 | ISO-8859-14 - Latin alphabet No. 8 (Celtic) | | ||
| | 17 | ISO-8859-15 - Latin alphabet No. 9 | | ||
| | 18 | ISO-8859-16 - Latin alphabet No. 10 | | ||
| | 20 | Shift-Jis (JISX 0208 and JISX 0201) ❖ | | ||
| | 21 | Windows-1250 - Latin 2 (Central Europe) | | ||
| | 22 | Windows-1251 - Cyrillic | | ||
| | 23 | Windows-1252 – Latin 1 | | ||
| | 24 | Windows-1256 - Arabic | | ||
| | 25 | UCS-2 Unicode (High Order Byte First) ❖ | | ||
| | 26 | Unicode (UTF-8) | | ||
| | 27 | ISO-646:1991 7bit Charset | | ||
| | 28 | Big-5 (Taiwan) Chinese Charset ❖ | | ||
| | 29 | GB(PRC) Chinese Charset ❖ | | ||
| | 30 | Korean Charset (KSX1001:1998) ❖ | | ||
|
|
||
| :::tip ❖ Note | ||
| When using the ECI flag, all input data will be treated as raw binary. This means that any data which is encoded using a multible byte encoding scheme (one other than UTF-8) will not use optimal compression. | ||
|
|
||
| It's recomended that data using these schemes are converted to UTF-8 before rendering the barcode. | ||
| ::: | ||
|
|
||
| ### GS1 Data | ||
|
|
||
| GS1 data can be encoded in a number of symbologies. Application identifiers should be enclosed in square brackets (`[...]`) followed by the data to be encoded. | ||
|
|
||
| To encode GS1 data, set the `encoding` option to `Encoding.GS1_MODE` (see [Encoding Modes](#encoding-modes)). | ||
|
|
||
| :::tip Note | ||
| GS1 mode is automatically assumed for EAN-128, DataBar and Composite symbologies but is also available for [Code 16k](../guide/symbologies/stacked.md#code-16k-en-12323), [Data Matrix](../guide/symbologies/two-dimensional.md#data-matrix-ecc200-iso-16022), [QR Code](../guide/symbologies/two-dimensional.md#qr-code-iso-18004), [Aztec Code](../guide/symbologies/two-dimensional.md#aztec-code-iso-24778), [DotCode](../guide/symbologies/two-dimensional.md#dotcode), and [QR Code](../guide/symbologies/two-dimensional.md#qr-code-iso-18004). | ||
| ::: | ||
|
|
||
| ### HIBC Data | ||
|
|
||
| **Health Industry Bar Code (HIBC)** data may also be encoded in the [Code 39](../guide/symbologies/one-dimensional.md#code-39), [Code 128](../guide/symbologies/one-dimensional.md#code-128), [Codablock-F](../guide/symbologies/stacked.md#codablock-f), [Data Matrix](../guide/symbologies/two-dimensional.md#data-matrix-ecc200-iso-16022), [QR Code](../guide/symbologies/two-dimensional.md#qr-code-iso-18004), [PDF417](../guide/symbologies/stacked.md#pdf417-iso-15438) and [Aztec Code](../guide/symbologies/two-dimensional.md#aztec-code-iso-24778) symbologies. Within this mode, the leading `+` and the check character are automatically added. | ||
|
|
||
| ## Encoding Modes | ||
|
|
||
| The way in which the input data is encoded can be set using the `encoding` property. Valid values are described below. | ||
|
|
||
| | Value | Effect | | ||
| |--------------|--------------------------------------------------------------| | ||
| | DATA_MODE | Uses full ASCII range interpreted as Latin-1 or binary data. | | ||
| | UNICODE_MODE | Uses pre-formatted UTF-8 input. | | ||
| | GS1_MODE | Encodes GS1 data using FNC1 characters. | | ||
|
|
||
| Values can be accessed using the `Encoding` enumerated type. | ||
|
|
||
| ### Example | ||
|
|
||
| ```js | ||
| const symbology = require('symbology') | ||
|
|
||
| symbology.createStream({ | ||
| symbology: Symbology.Barcode.CODE128, | ||
| encoding: symbology.Encoding.GS1_MODE | ||
| }, '12345') | ||
| ``` | ||
|
|
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,22 +1,59 @@ | ||
| # Options | ||
|
|
||
| ## Basic Config | ||
|
|
||
| The following symbology options are available: | ||
|
|
||
| | Enumerated type | Type | Meaning | Required? | Default value | | ||
| |-------------------------|-----------|---------------------------------------------------------------------------------------------------------------|-----------|---------------| | ||
| | Enumerated type | Type | Meaning | Required? | Default value | | ||
| |-------------------------|-----------|----------------------------------------------------------------------------------------|-----------|---------------| | ||
| | `symbology` | `Symbol` | The enumerated type of the symbology (see [Reference](../guide/README.md) for a list). | **Yes** | | | ||
| | `height` | `Number` | The height of the image. If specified, this will maintain the aspect ratio. | No | 50 | | ||
| | `whitespaceWidth` | `Number` | Width of whitespace, for barcodes which have this option. | No | 0 | | ||
| | `borderWidth` | `Number` | Width of border. | No | 0 | | ||
| | `outputOptions` | `Number` | Symbology-specific output option. | No | `NULL` | | ||
| | `foregroundColor` | `String` | Barcode foreground color. | No | `FFFFFF` | | ||
| | `backgroundColor` | `String` | Barcode background color. | No | `000000` | | ||
| | `fileName` | `String` | Full path to the file to render. | **Yes*** | | | ||
| | `scale` | `Number` | Scale of the barcode image. Applies only to PNG. | No | 1.0 | | ||
| | `option1` | `Number` | Symbology-type-specific option value. | No | `NULL` | | ||
| | `option2` | `Number` | Symbology-type-specific option value. | No | `NULL` | | ||
| | `option3` | `Number` | Symbology-type-specific option value. | No | `NULL` | | ||
| | `showHumanReadableText` | `Boolean` | Show or hide the symbology data as human-readable text (if applicable). | No | `true` | | ||
|
|
||
|
|
||
| \* required only if using [`createFile()`](api.md#createfile). | ||
| | `height` | `Number` | The height of the image. If specified, this will maintain the aspect ratio. | No | `50` | | ||
| | `whitespaceWidth` | `Number` | Width of whitespace, for barcodes which have this option. | No | `0` | | ||
| | `borderWidth` | `Number` | Width of border. | No | `0` | | ||
| | `outputOptions` | `Number` | [Symbology-specific output options.](#output-options) | No | `0` | | ||
| | `foregroundColor` | `String` | Barcode foreground color. | No | `FFFFFF` | | ||
| | `backgroundColor` | `String` | Barcode background color. | No | `000000` | | ||
| | `fileName` | `String` | Full path to the file to render. | **Yes*** | | | ||
| | `scale` | `Number` | Scale of the barcode image. Applies only to PNG. | No | `1.0` | | ||
| | `option1` | `Number` | Symbology-type-specific option value. | No | `null` | | ||
| | `option2` | `Number` | Symbology-type-specific option value. | No | `null` | | ||
| | `option3` | `Number` | Symbology-type-specific option value. | No | `null` | | ||
| | `showHumanReadableText` | `Boolean` | Show or hide the symbology data as human-readable text (if applicable). | No | `true` | | ||
| | `encoding` | `Encoding`| [The enumerated encoding type of input data.](encoding.md#encoding-modes) | No | `DATA_MODE` | | ||
| | `eci` | `Number` | [ECI encoding mode.](encoding.md#extended-channel-interpolation-eci) | No | `0` | | ||
| | `primary` | `String` | Primary message data for more complex symbols. | No | `null` | | ||
| | `text` | `String` | Human-readable text to display. Defaults to the input data value. | No | (Data value) | | ||
|
|
||
| \* required only if using [`createFile()`](api.md#createfile). | ||
|
|
||
| ## Output Options | ||
|
|
||
| `outputOptions` can be used to adjust various aspects of the rendered symbology. | ||
|
|
||
| | Value | Effect | | ||
| |----------------------|------------------------------------------------------------------------| | ||
| | `BARCODE_NO_ASCII` | No options selected. (default) | | ||
| | `BARCODE_BIND` | Boundary bars above and below the symbol and between rows if stacking. | | ||
| | `BARCODE_BOX` | Add a box surrounding the symbol and whitespace. | | ||
| | `READER_INIT` | Add a reader initialisation symbol to the data before encoding. | | ||
| | `SMALL_TEXT` | Use a smaller font for the human readable text. | | ||
| | `BOLD_TEXT` | Embolden the human readable text. | | ||
| | `CMYK_COLOUR` | Select the CMYK colour space option for encapsulated PostScript files. | | ||
| | `BARCODE_DOTTY_MODE` | Plot a matrix symbol using dots rather than squares. | | ||
|
|
||
| ### Multiple Options | ||
|
|
||
| Options can be applied using the `Options` enumerated type. | ||
|
|
||
| Multiple options can be selected by adding them together in the `outputOptions` value. | ||
|
|
||
| #### Example | ||
|
|
||
| ```js | ||
| const symbology = require('symbology') | ||
|
|
||
| symbology.createStream({ | ||
| symbology: Symbology.Barcode.CODE128, | ||
| outputOptions: symbology.Options.BARCODE_BIND + symbology.Options.READER_INIT | ||
| }, '12345') | ||
| ``` |
Oops, something went wrong.