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TQ Hirsch
2025-03-20 08:04:47 +01:00
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.appveyor.yml Normal file
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install:
- appveyor-retry appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
- if not defined RUSTFLAGS rustup-init.exe -y --default-host x86_64-pc-windows-msvc --default-toolchain nightly
- set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
- rustc -V
- cargo -V
build: false
test_script:
- cargo test --locked

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version: 2
updates:
- package-ecosystem: cargo
directory: "/"
schedule:
interval: daily
time: "08:00"
open-pull-requests-limit: 10

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/target
**/*.rs.bk
Cargo.lock
bin/
pkg/
wasm-pack.log

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.travis.yml Normal file
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language: rust
sudo: false
cache: cargo
matrix:
include:
# Builds with wasm-pack.
- rust: beta
env: RUST_BACKTRACE=1
addons:
firefox: latest
chrome: stable
before_script:
- (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
- (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
- cargo install-update -a
- curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
script:
- cargo generate --git . --name testing
# Having a broken Cargo.toml (in that it has curlies in fields) anywhere
# in any of our parent dirs is problematic.
- mv Cargo.toml Cargo.toml.tmpl
- cd testing
- wasm-pack build
- wasm-pack test --chrome --firefox --headless
# Builds on nightly.
- rust: nightly
env: RUST_BACKTRACE=1
before_script:
- (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
- (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
- cargo install-update -a
- rustup target add wasm32-unknown-unknown
script:
- cargo generate --git . --name testing
- mv Cargo.toml Cargo.toml.tmpl
- cd testing
- cargo check
- cargo check --target wasm32-unknown-unknown
- cargo check --no-default-features
- cargo check --target wasm32-unknown-unknown --no-default-features
- cargo check --no-default-features --features console_error_panic_hook
- cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
- cargo check --no-default-features --features "console_error_panic_hook wee_alloc"
- cargo check --target wasm32-unknown-unknown --no-default-features --features "console_error_panic_hook wee_alloc"
# Builds on beta.
- rust: beta
env: RUST_BACKTRACE=1
before_script:
- (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
- (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
- cargo install-update -a
- rustup target add wasm32-unknown-unknown
script:
- cargo generate --git . --name testing
- mv Cargo.toml Cargo.toml.tmpl
- cd testing
- cargo check
- cargo check --target wasm32-unknown-unknown
- cargo check --no-default-features
- cargo check --target wasm32-unknown-unknown --no-default-features
- cargo check --no-default-features --features console_error_panic_hook
- cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
# Note: no enabling the `wee_alloc` feature here because it requires
# nightly for now.

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[package]
name = "dmtx"
version = "0.1.0"
authors = ["TQ Hirsch <thequux@thequux.com>"]
edition = "2018"
description = "WASM-based Datamatrix encoder"
license = "MIT"
[lib]
crate-type = ["cdylib", "rlib"]
[features]
default = ["console_error_panic_hook"]
[dependencies]
wasm-bindgen = "0.2.84"
datamatrix = "0.3.1"
js-sys = "0.3.69"
# The `console_error_panic_hook` crate provides better debugging of panics by
# logging them with `console.error`. This is great for development, but requires
# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
# code size when deploying.
console_error_panic_hook = { version = "0.1.7", optional = true }
serde-wasm-bindgen = "0.6.5"
serde = { version = "1.0.204", features = ["derive"] }
flagset = "0.4.5"
[dev-dependencies]
wasm-bindgen-test = "0.3.34"
[profile.release]
# Tell `rustc` to optimize for small code size.
opt-level = "s"

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25
LICENSE_MIT Normal file
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Copyright (c) 2018 TQ Hirsch <thequux@thequux.com>
Permission is hereby granted, free of charge, to any
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

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JavaScript/WASM bindings for the Rust [datamatrix] crate
[datamatrix]: https://crates.io/crates/datamatrix

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[toolchain]
# We need at least 1.80 for stable lazy_cell
channel = "beta"
targets = ["wasm32-unknown-unknown"]

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use datamatrix::{DataMatrixBuilder, EncodationType};
use datamatrix::data::DataEncodingError;
use datamatrix::placement::PathSegment;
use flagset::FlagSet;
use js_sys::{JsString, Uint8Array};
use wasm_bindgen::prelude::*;
#[wasm_bindgen(typescript_custom_section)]
const TS_ENCODINGS: &'static str = r#"
/// Ugh, I hate this so much. But this is what it says in the spec...
type EncodationName = "ascii" | "c40" | "text" | "x12" | "edifact" | "base256";
type Encodation = EncodationName | Array<EncodationName>;
interface CodingOptions {
size?: SymbolSizeSpec;
macros?: bool;
encodings?: Encodation;
}
"#;
#[wasm_bindgen]
extern "C" {
#[wasm_bindgen(typescript_type = "CodingOptions")]
pub type CodingOptions;
type Encodation;
#[wasm_bindgen(method, structural, getter = size)]
fn co_size(this: &CodingOptions) -> Option<crate::size_spec::SizeSpec>;
#[wasm_bindgen(method, structural, getter = macros)]
fn co_macros(this: &CodingOptions) -> Option<bool>;
#[wasm_bindgen(method, structural, getter = encodings)]
fn co_encodings(this: &CodingOptions) -> Option<Encodation>;
#[wasm_bindgen(typescript_type = "Uint8Array | string")]
pub type Buffer;
}
enum DataSource {
String(String),
Bytes(Vec<u8>),
}
fn buffer_from_js(buf: Buffer) -> Result<DataSource, JsError> {
buf.dyn_into::<Uint8Array>()
.map(|array| DataSource::Bytes(array.to_vec()))
.or_else(|js| {
js.dyn_into::<js_sys::JsString>()
.and_then(|s| s.as_string().ok_or_else(|| JsValue::from(s).into()))
.map(DataSource::String)
})
.or_else(|_| Err(JsError::new("Buffer must be a string or Uint8Array")))
}
fn encodation_type_from_js_string(s: JsValue) -> EncodationType {
let s = s
.as_string()
.unwrap_or_else(|| wasm_bindgen::throw_str("Invalid encodation type"));
let string = s.as_str();
match string {
"ascii" => EncodationType::Ascii,
"c40" => EncodationType::C40,
"text" => EncodationType::Text,
"x12" => EncodationType::X12,
"edifact" => EncodationType::Edifact,
"base256" => EncodationType::Base256,
_ => wasm_bindgen::throw_str("Invalid encodation type"),
}
}
fn encodation_type_from_js(e: Encodation) -> FlagSet<EncodationType> {
e.dyn_into::<JsString>()
.map(|s| encodation_type_from_js_string(s.into()).into())
.or_else(|e| {
e.dyn_into::<js_sys::Array>().map(|a| {
a.iter()
.map(|js| encodation_type_from_js_string(js))
.fold(FlagSet::default(), |a, n| a | n)
})
})
.unwrap_or_else(|_| wasm_bindgen::throw_str("Invalid encodation type"))
}
#[wasm_bindgen]
pub struct DataMatrix{
dmtx: datamatrix::DataMatrix,
bitmap: datamatrix::placement::Bitmap<bool>,
}
#[wasm_bindgen]
impl DataMatrix {
#[wasm_bindgen(constructor)]
pub fn encode(data: Buffer, options: Option<CodingOptions>) -> Result<DataMatrix, JsError> {
let mut builder = DataMatrixBuilder::new();
if let Some(options) = options {
if let Some(size) = options.co_size() {
let size = crate::size_spec::symbolset_from_json(size);
builder = builder.with_symbol_list(size);
}
if let Some(encoding) = options.co_encodings() {
builder = builder.with_encodation_types(encodation_type_from_js(encoding));
}
if let Some(macros) = options.co_macros() {
builder = builder.with_macros(macros);
}
}
match buffer_from_js(data)? {
DataSource::Bytes(bytes) => builder.encode(bytes.as_slice()),
DataSource::String(str) => builder.encode_str(&str),
}
.map(|dmtx| {
let bitmap = dmtx.bitmap();
DataMatrix{dmtx, bitmap}
})
.map_err(|err| match err {
DataEncodingError::TooMuchOrIllegalData => "Too much data",
DataEncodingError::SymbolListEmpty => "No valid symbol size",
})
.map_err(|err| JsError::new(err))
.map_err(Into::into)
}
/// Get the full set of codewords encoded into this barcode
pub fn codewords(&self) -> Box<[u8]> {
self.dmtx.codewords().to_vec().into_boxed_slice()
}
/// Get the data part of the low-level encoding of the barcode
pub fn data_codewords(&self) -> Box<[u8]> {
self.dmtx.data_codewords().to_vec().into_boxed_slice()
}
/// Draw the barcode via an SVG path. Note: this path expects even/odd fill
/// i.e., embed this in `<path fill-rule="evenodd" d="..." />
pub fn svg_path(&self, x0: Option<isize>, y0: Option<isize>) -> String {
use std::fmt::Write;
let mut path: String = String::new();
let x0 = x0.unwrap_or(0);
let y0 = y0.unwrap_or(0);
write!(path, "M{x0},{y0}").unwrap();
for part in self.bitmap.path() {
match part {
PathSegment::Move(dx, dy) => write!(path, "m{dx},{dy}"),
PathSegment::Horizontal(h) => write!(path, "h{h}"),
PathSegment::Vertical(v) => write!(path, "v{v}"),
PathSegment::Close => write!(path, "z"),
}.unwrap();
}
path
}
/// Return an array of filled pixel coordinates.
/// The returned buffer is `[x0,y0,x1,y1,...]`
pub fn pixels(&self) -> Box<[u8]> {
let mut ret = Vec::new();
for (x,y) in self.bitmap.pixels() {
if x > 255 || y > 255 {
panic!("Returned too high of a pixel number");
}
ret.push(x as u8);
ret.push(y as u8);
}
ret.into_boxed_slice()
}
pub fn width(&self) -> usize {
self.bitmap.width()
}
pub fn height(&self) -> usize {
self.bitmap.height()
}
}

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mod utils;
macro_rules! hash_map {
($($($key:expr),+ => $value:expr),*$(,)?) => {{
let mut res = HashMap::new();
$($(
res.insert($key, $value);
)+)*
res
}};
}
mod size_spec;
mod datamatrix;

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use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::sync::LazyLock;
use datamatrix::{SymbolList, SymbolSize};
use wasm_bindgen::throw_val;
use wasm_bindgen::prelude::*;
#[wasm_bindgen(typescript_custom_section)]
const SIZE_SPEC_TS: &'static str = r#"
interface SymbolSizeFilter {
square?: bool;
rectangle?: bool;
extended?: bool;
min_width?: number;
max_width?: number;
min_height?: number;
max_height?: number;
}
type SymbolSize = "10" | "10x10" | "12" | "12x12" | "14" | "14x14" | "16" |
"16x16" | "18" | "18x18" | "20" | "20x20" | "22" | "22x22" | "24" |
"24x24" | "26" | "26x26" | "32" | "32x32" | "36" | "36x36" | "40" |
"40x40" | "44" | "44x44" | "48" | "48x48" | "52" | "52x52" | "64" |
"64x64" | "72" | "72x72" | "80" | "80x80" | "88" | "88x88" | "96" |
"96x96" | "104" | "104x104" | "120" | "120x120" | "132" | "132x132" |
"144" | "144x144" | "8x18" | "8x32" | "12x26" | "12x36" | "16x36" |
"16x48" | "8x48" | "8x64" | "8x80" | "8x96" | "8x120" | "8x144" |
"12x64" | "12x88" | "16x64" | "20x36" | "20x44" | "20x64" | "22x48" |
"24x48" | "24x64" | "26x40" | "26x48" | "26x64";
type SymbolSizeSpec = SymbolSize | SymbolSizeFilter | Array<SymbolSizeSpec>;
"#;
#[wasm_bindgen]
extern "C" {
#[wasm_bindgen(typescript_type = "SymbolSizeSpec")]
pub type SizeSpec;
}
#[derive(Serialize, Deserialize)]
pub struct SizeFilter {
square: Option<bool>,
rectangle: Option<bool>,
extended: Option<bool>,
min_width: Option<usize>,
max_width: Option<usize>,
min_height: Option<usize>,
max_height: Option<usize>,
}
static SYMBOL_SIZE_STRINGS: LazyLock<HashMap<&'static str, SymbolSize>> = LazyLock::new(|| {
hash_map! {
"10" , "10x10" => SymbolSize::Square10,
"12" , "12x12" => SymbolSize::Square12,
"14" , "14x14" => SymbolSize::Square14,
"16" , "16x16" => SymbolSize::Square16,
"18" , "18x18" => SymbolSize::Square18,
"20" , "20x20" => SymbolSize::Square20,
"22" , "22x22" => SymbolSize::Square22,
"24" , "24x24" => SymbolSize::Square24,
"26" , "26x26" => SymbolSize::Square26,
"32", "32x32" => SymbolSize::Square32,
"36", "36x36" => SymbolSize::Square36,
"40", "40x40" => SymbolSize::Square40,
"44", "44x44" => SymbolSize::Square44,
"48", "48x48" => SymbolSize::Square48,
"52", "52x52" => SymbolSize::Square52,
"64", "64x64" => SymbolSize::Square64,
"72", "72x72" => SymbolSize::Square72,
"80", "80x80" => SymbolSize::Square80,
"88", "88x88" => SymbolSize::Square88,
"96", "96x96" => SymbolSize::Square96,
"104", "104x104" => SymbolSize::Square104,
"120", "120x120" => SymbolSize::Square120,
"132", "132x132" => SymbolSize::Square132,
"144", "144x144" => SymbolSize::Square144,
"8x18" => SymbolSize::Rect8x18,
"8x32" => SymbolSize::Rect8x32,
"12x26" => SymbolSize::Rect12x26,
"12x36" => SymbolSize::Rect12x36,
"16x36" => SymbolSize::Rect16x36,
"16x48" => SymbolSize::Rect16x48,
"8x48" => SymbolSize::Rect8x48,
"8x64" => SymbolSize::Rect8x64,
"8x80" => SymbolSize::Rect8x80,
"8x96" => SymbolSize::Rect8x96,
"8x120" => SymbolSize::Rect8x120,
"8x144" => SymbolSize::Rect8x144,
"12x64" => SymbolSize::Rect12x64,
"12x88" => SymbolSize::Rect12x88,
"16x64" => SymbolSize::Rect16x64,
"20x36" => SymbolSize::Rect20x36,
"20x44" => SymbolSize::Rect20x44,
"20x64" => SymbolSize::Rect20x64,
"22x48" => SymbolSize::Rect22x48,
"24x48" => SymbolSize::Rect24x48,
"24x64" => SymbolSize::Rect24x64,
"26x40" => SymbolSize::Rect26x40,
"26x48" => SymbolSize::Rect26x48,
"26x64" => SymbolSize::Rect26x64,
}
});
fn symbolsize_from_string(name: &str) -> Option<SymbolSize> {
SYMBOL_SIZE_STRINGS.get(name).copied()
}
fn symbolsize_from_int(name: u32) -> Option<SymbolSize> {
Some(match name {
10 => SymbolSize::Square10,
12 => SymbolSize::Square12,
14 => SymbolSize::Square14,
16 => SymbolSize::Square16,
18 => SymbolSize::Square18,
20 => SymbolSize::Square20,
22 => SymbolSize::Square22,
24 => SymbolSize::Square24,
26 => SymbolSize::Square26,
32 => SymbolSize::Square32,
36 => SymbolSize::Square36,
40 => SymbolSize::Square40,
44 => SymbolSize::Square44,
48 => SymbolSize::Square48,
52 => SymbolSize::Square52,
64 => SymbolSize::Square64,
72 => SymbolSize::Square72,
80 => SymbolSize::Square80,
88 => SymbolSize::Square88,
96 => SymbolSize::Square96,
104 => SymbolSize::Square104,
120 => SymbolSize::Square120,
132 => SymbolSize::Square132,
144 => SymbolSize::Square144,
_ => return None,
})
}
pub fn symbolset_from_json(json: SizeSpec) -> SymbolList {
if let Some(size) = json.as_string() {
if let Some(size) = symbolsize_from_string(&size) {
return size.into()
}
} else if let Some(size) = json.as_f64() {
if size as u32 as f64 == size {
if let Some(size) = symbolsize_from_int(size as u32) {
return size.into()
}
}
} else if let Some(arr) = json.dyn_ref::<js_sys::Array>() {
let mut symset = SymbolList::with_whitelist(std::iter::empty());
for item in arr.values() {
match item {
Err(err) => throw_val(err),
Ok(val) => symset.extend(symbolset_from_json(val.into())),
}
}
return symset;
} else if let Ok(value) = serde_wasm_bindgen::from_value::<SizeFilter>(json.into()) {
let mut symset = if value.extended.unwrap_or(false) {
SymbolList::with_extended_rectangles()
} else {
SymbolList::default()
};
if !value.square.unwrap_or(true) {
symset = symset.enforce_rectangular()
}
if !value.rectangle.unwrap_or(true) {
symset = symset.enforce_square()
}
if let Some(v) = value.min_height {
symset = symset.enforce_height_in(v..);
}
if let Some(v) = value.max_height {
symset = symset.enforce_height_in(..v + 1);
}
if let Some(v) = value.min_width {
symset = symset.enforce_width_in(v..);
}
if let Some(v) = value.max_width {
symset = symset.enforce_width_in(..v + 1);
}
return symset;
}
wasm_bindgen::throw_str("Invalid size");
}

11
src/utils.rs Normal file
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@@ -0,0 +1,11 @@
#[allow(unused)]
pub fn set_panic_hook() {
// When the `console_error_panic_hook` feature is enabled, we can call the
// `set_panic_hook` function at least once during initialization, and then
// we will get better error messages if our code ever panics.
//
// For more details see
// https://github.com/rustwasm/console_error_panic_hook#readme
#[cfg(feature = "console_error_panic_hook")]
console_error_panic_hook::set_once();
}

13
tests/web.rs Normal file
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@@ -0,0 +1,13 @@
//! Test suite for the Web and headless browsers.
#![cfg(target_arch = "wasm32")]
extern crate wasm_bindgen_test;
use wasm_bindgen_test::*;
wasm_bindgen_test_configure!(run_in_browser);
#[wasm_bindgen_test]
fn pass() {
assert_eq!(1 + 1, 2);
}