basic functions for rxing-cli

src/barcode_format.rs

@@ -104,3 +104,29 @@ impl Display for BarcodeFormat {
         )
     }
 }
+
+/// Defaults to QRCode if no proper formatting available
+impl From<&str> for BarcodeFormat {
+    fn from(value: &str) -> Self {
+        match value.to_lowercase().as_str() {
+            "aztec" => BarcodeFormat::AZTEC,
+            "codabar" => BarcodeFormat::CODABAR,
+            "code 39" | "code_39" | "code39" => BarcodeFormat::CODE_39,
+            "code 93" | "code_93" | "code93" => BarcodeFormat::CODE_93,
+            "code 128" | "code_129" | "code128" => BarcodeFormat::CODE_128,
+            "datamatrix" |"data matrix" | "data_matrix"=> BarcodeFormat::DATA_MATRIX,
+            "ean 8" | "ean_8" | "ean8" => BarcodeFormat::EAN_8,
+            "ean 13" |"ean_13" | "ean13"=> BarcodeFormat::EAN_13,
+            "itf" | "itf_code" | "itf14" | "itf 14" | "itf_14" | "interleaved 2 of 5"=> BarcodeFormat::ITF,
+            "maxicode" | "maxi_code"=> BarcodeFormat::MAXICODE,
+            "pdf 417" | "pdf_417" | "pdf417"=> BarcodeFormat::PDF_417,
+            "qrcode" | "qr_code" | "qr code"=> BarcodeFormat::QR_CODE,
+            "rss 14" | "rss_14" | "rss14" | "gs1 databar" => BarcodeFormat::RSS_14,
+            "rss expanded" | "expanded rss" | "rss_expanded"=> BarcodeFormat::RSS_EXPANDED,
+            "upc a" |"upc_a" | "upca"=> BarcodeFormat::UPC_A,
+            "upc e" |"upc_e" | "upce" => BarcodeFormat::UPC_E,
+            "upc ean extension" | "upc extension" | "ean extension" | "upc/ean extension" | "upc_ean_extension"=> BarcodeFormat::UPC_EAN_EXTENSION,
+            _ => BarcodeFormat::QR_CODE,
+        }
+    }
+}

src/common/bit_matrix.rs

@@ -662,3 +662,24 @@ impl fmt::Display for BitMatrix {
         write!(f, "{}", self.toString("X ", "  "))
     }
 }
+
+#[cfg(feature = "image")]
+impl From<BitMatrix> for image::DynamicImage {
+    fn from(value: BitMatrix) -> Self {
+        (&value).into()
+    }
+}
+
+#[cfg(feature = "image")]
+impl From<&BitMatrix> for image::DynamicImage {
+    fn from(value: &BitMatrix) -> Self {
+        let mut pixels = image::ImageBuffer::new(value.width, value.height);
+        
+        for y in 0..value.height {
+            for x in 0..value.width {
+                pixels.put_pixel(x, y, image::Luma([if value.get(x, y)  {u8::MIN} else {u8::MAX} ]));
+            }
+        }
+        pixels.into()
+    }
+}

src/helpers.rs

@@ -4,7 +4,7 @@ use std::{
 };
 
 use crate::{
-    common::HybridBinarizer,
+    common::{BitMatrix, HybridBinarizer},
     multi::{GenericMultipleBarcodeReader, MultipleBarcodeReader},
     BarcodeFormat, BinaryBitmap, BufferedImageLuminanceSource, DecodeHintType, DecodeHintValue,
     DecodingHintDictionary, Exceptions, Luma8LuminanceSource, MultiFormatReader, RXingResult,
@@ -25,7 +25,9 @@ pub fn detect_in_file_with_hints(
     barcode_type: Option<BarcodeFormat>,
     hints: &mut DecodingHintDictionary,
 ) -> Result<RXingResult, Exceptions> {
-    let img = image::open(file_name).unwrap();
+    let Ok(img) = image::open(file_name) else {
+        return Err(Exceptions::IllegalArgumentException(Some(format!("file '{}' not found or cannot be opened", file_name))));
+    };
     let mut multi_format_reader = MultiFormatReader::default();
 
     if let Some(bc_type) = barcode_type {
@@ -138,3 +140,15 @@ pub fn detect_multiple_in_luma_with_hints(
         hints,
     )
 }
+
+#[cfg(feature = "image")]
+pub fn save_image(file_name: &str, bit_matrix: &BitMatrix) -> Result<(), Exceptions> {
+    let image: image::DynamicImage = bit_matrix.into();
+    match image.save(file_name) {
+        Ok(_) => Ok(()),
+        Err(err) => Err(Exceptions::IllegalArgumentException(Some(format!(
+            "could not save file '{}': {}",
+            file_name, err
+        )))),
+    }
+}

src/multi_format_writer.rs

@@ -34,6 +34,7 @@ use crate::{
  *
  * @author dswitkin@google.com (Daniel Switkin)
  */
+#[derive(Default)]
 pub struct MultiFormatWriter;
 
 impl Writer for MultiFormatWriter {