dqr 0.14.97

Decode QR with Quircs on CLI
Documentation 
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use dqr::Quirc;

#[test]
fn empty_jpeg() {
	empty("jpeg");
}

#[test]
fn empty_png() {
	empty("png");
}

fn empty(ext: &str) {
	let mut q = Quirc::default();

	let empty_image = image::open(format!("./tests/data/1x1.{ext}")).unwrap().into_luma8();

	q.identify(empty_image.width() as usize, empty_image.height() as usize, &empty_image);
	assert_eq!(q.count(), 0);
}

#[test]
fn two_qr_codes_small_jpeg() {
	two_qr_codes_small("jpeg");
}

#[test]
fn two_qr_codes_small_png() {
	two_qr_codes_small("png");
}

fn two_qr_codes_small(ext: &str) {
	let mut q = Quirc::default();
	let image = image::open(format!("./tests/data/Hello+World.{ext}")).unwrap().into_luma8();

	let res: Vec<_> = q.identify(image.width() as usize, image.height() as usize, &image).collect::<Result<_, _>>().unwrap();
	assert_eq!(res.len(), 2);

	let data = res[0].decode().unwrap();
	assert_eq!(data.version, 1);
	assert_eq!(data.ecc_level, dqr::EccLevel::H);
	assert_eq!(data.mask, 1);
	assert_eq!(data.data_type, Some(dqr::DataType::Byte));
	assert_eq!(data.eci, Some(dqr::Eci::Utf8));
	assert_eq!(data.payload, b"Hello");

	let data = res[1].decode().unwrap();
	assert_eq!(data.version, 1);
	assert_eq!(data.ecc_level, dqr::EccLevel::H);
	assert_eq!(data.mask, 3);
	assert_eq!(data.data_type, Some(dqr::DataType::Byte));
	assert_eq!(data.eci, Some(dqr::Eci::Utf8));
	assert_eq!(data.payload, b"World");
}

#[test]
fn two_qr_codes_large_jpeg() {
	two_qr_codes_large("jpeg");
}

#[test]
fn two_qr_codes_large_png() {
	two_qr_codes_large("png");
}

fn two_qr_codes_large(ext: &str) {
	let mut q = Quirc::default();
	let image = image::open(format!("./tests/data/big_image_with_two_qrcodes.{ext}")).unwrap().into_luma8();

	let res: Vec<_> = q.identify(image.width() as usize, image.height() as usize, &image).collect::<Result<_, _>>().unwrap();
	assert_eq!(res.len(), 2);

	let data = res[0].decode().unwrap();
	assert_eq!(data.version, 4);
	assert_eq!(data.ecc_level, dqr::EccLevel::M);
	assert_eq!(data.mask, 2);
	assert_eq!(data.data_type, Some(dqr::DataType::Byte));
	assert_eq!(data.eci, None);
	assert_eq!(data.payload, b"from javascript");

	let data = res[1].decode().unwrap();
	assert_eq!(data.version, 4);
	assert_eq!(data.ecc_level, dqr::EccLevel::M);
	assert_eq!(data.mask, 2);
	assert_eq!(data.data_type, Some(dqr::DataType::Byte));
	assert_eq!(data.eci, None);
	assert_eq!(data.payload, b"here comes qr!");
}

#[test]
fn generated_png() {
	use dqr::{DataType, EccLevel};
	use std::collections::HashMap;
	use std::path::PathBuf;

	let mut q = Quirc::default();

	let mut mode_to_data: HashMap<DataType, &'static [u8]> = HashMap::new();
	mode_to_data.insert(DataType::Numeric, b"42");
	mode_to_data.insert(DataType::Alpha, b"AC-42");
	mode_to_data.insert(DataType::Byte, b"aA1234");
	mode_to_data.insert(DataType::Kanji, &[0x93, 0x5f, 0xe4, 0xaa]); // 点茗 in Shift-JIS

	for version in dqr::VERSION_MIN..=dqr::VERSION_MAX {
		for ecc_level in &[EccLevel::M, EccLevel::L, EccLevel::H, EccLevel::Q] {
			for mode in &[DataType::Numeric, DataType::Alpha, DataType::Byte, DataType::Kanji] {
				let filename = PathBuf::from(format!(
					"./tests/data/generated/version={:2},level={:?},mode={}.png",
					version,
					ecc_level,
					mode.to_string().to_uppercase()
				));

				println!("-- parsing {}", filename.display());

				if !filename.exists() {
					println!("  skipping: missing file");
					continue;
				}

				// Known failures, same on node-quirc
				#[allow(clippy::nonminimal_bool)]
				if version == 23 && *ecc_level == EccLevel::Q && *mode == DataType::Numeric
					|| version == 23 && *ecc_level == EccLevel::Q && *mode == DataType::Numeric
					|| version == 23 && *ecc_level == EccLevel::Q && *mode == DataType::Kanji
					|| version == 34 && *ecc_level == EccLevel::L && *mode == DataType::Alpha
					|| version == 34 && *ecc_level == EccLevel::L && *mode == DataType::Byte
					|| version == 36 && *ecc_level == EccLevel::M && *mode == DataType::Alpha
					|| version == 36 && *ecc_level == EccLevel::M && *mode == DataType::Byte
				{
					println!("  skipping: known failure");
					continue;
				}

				let image = image::open(&filename).expect("failed to open image").into_luma8();

				let res: Vec<_> = q.identify(image.width() as usize, image.height() as usize, &image).collect::<Result<_, _>>().unwrap();
				assert_eq!(res.len(), 1);

				let data = res[0].decode().expect("failed to decode");
				assert_eq!(data.version, version);
				assert_eq!(data.ecc_level, *ecc_level);
				assert_eq!(data.data_type, Some(*mode));
				assert_eq!(&data.payload, mode_to_data.get(mode).expect("missing data for mode"));
			}
		}
	}
}