feat: add initial filtered image support

Author: hschimke

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rxing-wasm"
-version = "0.2.5"
+version = "0.2.6"
 edition = "2021"
 description = "wasm bindings for rxing to provide commong barcode operations (decode/encode)"
 repository = "https://github.com/rxing-core/rxing-wasm"
@@ -25,7 +25,7 @@ js-sys = "0.3.61"
 # code size when deploying.
 console_error_panic_hook = { version = "0.1.6", optional = true }
 
-rxing = {version = "~0.5.7", default-features = false, features = ["wasm_support"]}
+rxing = {version = "~0.5.8", default-features = false, features = ["wasm_support"]}
 #rxing = {path="../rxing", version = "~0.2.23", default-features = false, features = ["wasm_support"]}
 
 [dev-dependencies]

examples/webpack+js/index.html

@@ -16,6 +16,7 @@ <h1>RXing - Decode Barcodes</h1>
       <div id="DecodeHints">
         <label for="Other">Other:</label><input type="text" name="Other" id="Other" />
         <label for="PureBarcode">PureBarcode:</label><input type="checkbox" name="PureBarcode" id="PureBarcode" />
+        <label for="FilterInput">FilterInput:</label><input type="checkbox" name="FilterInput" id="FilterInput" />
         <label for="PossibleFormats">PossibleFormats:</label><input type="text" name="PossibleFormats"
           id="PossibleFormats" />
         <label for="TryHarder">TryHarder:</label><input type="checkbox" name="TryHarder" id="TryHarder" checked="true" />
@@ -68,4 +69,4 @@ <h1>RXing - Decode Barcodes</h1>
 </html>
 
 <!-- Copyright 2023 Henry Schimke -->
-<!-- Using rxing-wasm v0.2.5 -->
+<!-- Using rxing-wasm v0.2.6 -->

examples/webpack+js/index.js

@@ -30,10 +30,11 @@ function onClickScan() {
     const context = canvas.getContext('2d');
     const imageData = context.getImageData(0, 0, canvas.width, canvas.height);
     const luma_data = convert_js_image_to_luma(imageData.data);
+    const filter_image = document.getElementById("FilterInput").checked;
     const hints = getHints();
     let result;
     try {
-        result = decode_barcode_with_hints(luma_data, canvas.width, canvas.height, hints);
+        result = decode_barcode_with_hints(luma_data, canvas.width, canvas.height, hints, filter_image);
     } catch (e) {
         alert("Issue decoding: " + e);
     }

examples/webpack+js/package.json

@@ -20,6 +20,6 @@
     "webpack-dev-server": "^4.11.1"
   },
   "dependencies": {
-    "rxing-wasm": "0.2.5"
+    "rxing-wasm": "0.2.6"
   }
 }

src/lib.rs

@@ -98,7 +98,6 @@ impl From<BarcodeFormat> for rxing::BarcodeFormat {
             BarcodeFormat::UnsuportedFormat => rxing::BarcodeFormat::UNSUPORTED_FORMAT,
             BarcodeFormat::Telepen => rxing::BarcodeFormat::TELEPEN,
             BarcodeFormat::RectangularMicroQR => rxing::BarcodeFormat::RECTANGULAR_MICRO_QR_CODE,
-            
         }
     }
 }
@@ -127,6 +126,7 @@ impl From<rxing::BarcodeFormat> for BarcodeFormat {
             rxing::BarcodeFormat::UNSUPORTED_FORMAT => BarcodeFormat::UnsuportedFormat,
             rxing::BarcodeFormat::TELEPEN => BarcodeFormat::Telepen,
             rxing::BarcodeFormat::RECTANGULAR_MICRO_QR_CODE => BarcodeFormat::RectangularMicroQR,
+            _ => BarcodeFormat::UnsuportedFormat,
         }
     }
 }
@@ -301,6 +301,7 @@ pub fn decode_barcode(
     width: u32,
     height: u32,
     try_harder: Option<bool>,
+    filter_image: Option<bool>,
 ) -> Result<BarcodeResult, String> {
     let mut hints: rxing::DecodingHintDictionary = HashMap::new();
     if let Some(true) = try_harder {
@@ -309,8 +310,15 @@ pub fn decode_barcode(
             rxing::DecodeHintValue::TryHarder(true),
         );
     }
-    let Ok(result) =
-        rxing::helpers::detect_in_luma_with_hints(data, width, height, None, &mut hints)
+
+    let detection_function = if matches!(filter_image, Some(true)) {
+        rxing::helpers::detect_in_luma_filtered_with_hints
+    }else {
+        rxing::helpers::detect_in_luma_with_hints
+    };
+
+    let Ok(result) = 
+        detection_function(data, width, height, None, &mut hints)
     else {
         return Err("not found".to_owned());
     };
@@ -364,6 +372,7 @@ pub fn decode_barcode_rgb(
             rxing::DecodeHintValue::TryHarder(true),
         );
     }
+
     let mut multi_format_reader = rxing::MultiFormatReader::default();
 
     let Ok(result) = multi_format_reader.decode_with_hints(
@@ -389,14 +398,28 @@ pub fn decode_barcode_with_hints(
     width: u32,
     height: u32,
     hints: &mut decode_hints::DecodeHintDictionary,
+    filter_image: Option<bool>, 
 ) -> Result<BarcodeResult, String> {
-    let Ok(result) = rxing::helpers::detect_in_luma_with_hints(
-        data,
-        width,
-        height,
-        None,
-        hints.get_dictionary_mut(),
-    ) else {
+
+    let results = if matches!(filter_image, Some(true)) {
+        rxing::helpers::detect_in_luma_filtered_with_hints(
+            data,
+            width,
+            height,
+            None,
+            hints.get_dictionary_mut(),
+        )
+    }else {
+        rxing::helpers::detect_in_luma_with_hints(
+            data,
+            width,
+            height,
+            None,
+            hints.get_dictionary_mut(),
+        )
+    };
+    
+    let Ok(result) = results else {
         return Err("not found".to_owned());
     };
     Ok(result.into())