mirror of
https://github.com/starovoid/rxing.git
synced 2026-07-27 21:02:35 +00:00
ean 8 integration passes
This commit is contained in:
Henry Schimke
@@ -14,73 +14,88 @@
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
use crate::{Exceptions, common::BitArray, RXingResult, BarcodeFormat};
|
||||
use crate::{
|
||||
common::BitArray, BarcodeFormat, DecodeHintType, DecodeHintValue, Exceptions, RXingResult,
|
||||
RXingResultMetadataType, RXingResultMetadataValue, RXingResultPoint, Reader,
|
||||
};
|
||||
|
||||
use super::OneDReader;
|
||||
use super::{EANManufacturerOrgSupport, OneDReader, UPCEANExtensionSupport};
|
||||
|
||||
use lazy_static::lazy_static;
|
||||
|
||||
lazy_static! {
|
||||
pub static ref EAN_MANUFACTURER_SUPPORT: EANManufacturerOrgSupport =
|
||||
EANManufacturerOrgSupport::default();
|
||||
pub static ref UPC_EAN_EXTENSION_SUPPORT: UPCEANExtensionSupport =
|
||||
UPCEANExtensionSupport::default();
|
||||
}
|
||||
|
||||
// These two values are critical for determining how permissive the decoding will be.
|
||||
// We've arrived at these values through a lot of trial and error. Setting them any higher
|
||||
// lets false positives creep in quickly.
|
||||
const MAX_AVG_VARIANCE : f32= 0.48;
|
||||
const MAX_INDIVIDUAL_VARIANCE : f32= 0.7;
|
||||
// These two values are critical for determining how permissive the decoding will be.
|
||||
// We've arrived at these values through a lot of trial and error. Setting them any higher
|
||||
// lets false positives creep in quickly.
|
||||
pub const MAX_AVG_VARIANCE: f32 = 0.48;
|
||||
pub const MAX_INDIVIDUAL_VARIANCE: f32 = 0.7;
|
||||
|
||||
/**
|
||||
* Start/end guard pattern.
|
||||
*/
|
||||
const START_END_PATTERN : [u32;3]= [1, 1, 1,];
|
||||
/**
|
||||
* Start/end guard pattern.
|
||||
*/
|
||||
pub const START_END_PATTERN: [u32; 3] = [1, 1, 1];
|
||||
|
||||
/**
|
||||
* Pattern marking the middle of a UPC/EAN pattern, separating the two halves.
|
||||
*/
|
||||
const MIDDLE_PATTERN : [u32;5]= [1, 1, 1, 1, 1];
|
||||
/**
|
||||
* end guard pattern.
|
||||
*/
|
||||
const END_PATTERN : [u32;6]= [1, 1, 1, 1, 1, 1];
|
||||
/**
|
||||
* "Odd", or "L" patterns used to encode UPC/EAN digits.
|
||||
*/
|
||||
const L_PATTERNS : [[u32;4];10]= [
|
||||
[3, 2, 1, 1], // 0
|
||||
[2, 2, 2, 1], // 1
|
||||
[2, 1, 2, 2], // 2
|
||||
[1, 4, 1, 1], // 3
|
||||
[1, 1, 3, 2], // 4
|
||||
[1, 2, 3, 1], // 5
|
||||
[1, 1, 1, 4], // 6
|
||||
[1, 3, 1, 2], // 7
|
||||
[1, 2, 1, 3], // 8
|
||||
[3, 1, 1, 2] // 9
|
||||
];
|
||||
/**
|
||||
* Pattern marking the middle of a UPC/EAN pattern, separating the two halves.
|
||||
*/
|
||||
pub const MIDDLE_PATTERN: [u32; 5] = [1, 1, 1, 1, 1];
|
||||
/**
|
||||
* end guard pattern.
|
||||
*/
|
||||
pub const END_PATTERN: [u32; 6] = [1, 1, 1, 1, 1, 1];
|
||||
/**
|
||||
* "Odd", or "L" patterns used to encode UPC/EAN digits.
|
||||
*/
|
||||
pub const L_PATTERNS: [[u32; 4]; 10] = [
|
||||
[3, 2, 1, 1], // 0
|
||||
[2, 2, 2, 1], // 1
|
||||
[2, 1, 2, 2], // 2
|
||||
[1, 4, 1, 1], // 3
|
||||
[1, 1, 3, 2], // 4
|
||||
[1, 2, 3, 1], // 5
|
||||
[1, 1, 1, 4], // 6
|
||||
[1, 3, 1, 2], // 7
|
||||
[1, 2, 1, 3], // 8
|
||||
[3, 1, 1, 2], // 9
|
||||
];
|
||||
|
||||
/**
|
||||
* As above but also including the "even", or "G" patterns used to encode UPC/EAN digits.
|
||||
*/
|
||||
const L_AND_G_PATTERNS : [[u32;4];20] = {
|
||||
let new_array = [[0_u32;4];20];//new int[20][];
|
||||
new_array[0..10].copy_from_slice(&L_PATTERNS[0..10]);
|
||||
/**
|
||||
* As above but also including the "even", or "G" patterns used to encode UPC/EAN digits.
|
||||
*/
|
||||
pub const L_AND_G_PATTERNS: [[u32; 4]; 20] = {
|
||||
let mut new_array = [[0_u32; 4]; 20]; //new int[20][];
|
||||
let mut i = 0;
|
||||
while i < 10 {
|
||||
new_array[i] = L_PATTERNS[i];
|
||||
i += 1;
|
||||
}
|
||||
// new_array[0..10].copy_from_slice(&L_PATTERNS[0..10]);
|
||||
// System.arraycopy(L_PATTERNS, 0, L_AND_G_PATTERNS, 0, 10);
|
||||
let mut i = 10;
|
||||
while i < 20 {
|
||||
// for (int i = 10; i < 20; i++) {
|
||||
let widths = &L_PATTERNS[i - 10];
|
||||
let reversedWidths = [0_u32;4];//new int[widths.length];
|
||||
let mut j = 0;
|
||||
while j < 4 {
|
||||
// for (int j = 0; j < widths.length; j++) {
|
||||
reversedWidths[j] = widths[4 - j - 1];
|
||||
|
||||
j+=1;
|
||||
}
|
||||
new_array[i] = reversedWidths;
|
||||
// for (int i = 10; i < 20; i++) {
|
||||
let widths = &L_PATTERNS[i - 10];
|
||||
let mut reversedWidths = [0_u32; 4]; //new int[widths.length];
|
||||
let mut j = 0;
|
||||
while j < 4 {
|
||||
// for (int j = 0; j < widths.length; j++) {
|
||||
reversedWidths[j] = widths[4 - j - 1];
|
||||
|
||||
i+=1;
|
||||
j += 1;
|
||||
}
|
||||
new_array[i] = reversedWidths;
|
||||
|
||||
i += 1;
|
||||
}
|
||||
|
||||
new_array
|
||||
};
|
||||
};
|
||||
|
||||
/**
|
||||
* <p>Encapsulates functionality and implementation that is common to UPC and EAN families
|
||||
@@ -91,327 +106,461 @@ use super::OneDReader;
|
||||
* @author alasdair@google.com (Alasdair Mackintosh)
|
||||
*/
|
||||
pub trait UPCEANReader: OneDReader {
|
||||
// private final StringBuilder decodeRowStringBuffer;
|
||||
// private final UPCEANExtensionSupport extensionReader;
|
||||
// private final EANManufacturerOrgSupport eanManSupport;
|
||||
|
||||
// private final StringBuilder decodeRowStringBuffer;
|
||||
// private final UPCEANExtensionSupport extensionReader;
|
||||
// private final EANManufacturerOrgSupport eanManSupport;
|
||||
// protected UPCEANReader() {
|
||||
// decodeRowStringBuffer = new StringBuilder(20);
|
||||
// extensionReader = new UPCEANExtensionSupport();
|
||||
// eanManSupport = new EANManufacturerOrgSupport();
|
||||
// }
|
||||
|
||||
// protected UPCEANReader() {
|
||||
// decodeRowStringBuffer = new StringBuilder(20);
|
||||
// extensionReader = new UPCEANExtensionSupport();
|
||||
// eanManSupport = new EANManufacturerOrgSupport();
|
||||
// }
|
||||
|
||||
fn findStartGuardPattern( row:&BitArray) -> Result<Vec<u32>,Exceptions> {
|
||||
let foundStart = false;
|
||||
let startRange ;//= null;
|
||||
let nextStart = 0;
|
||||
let counters = vec![0_u32;START_END_PATTERN.len()];
|
||||
while (!foundStart) {
|
||||
Arrays.fill(counters, 0, START_END_PATTERN.len(), 0);
|
||||
startRange = Self::findGuardPattern(row, nextStart, false, START_END_PATTERN, counters);
|
||||
let start = startRange[0];
|
||||
nextStart = startRange[1];
|
||||
// Make sure there is a quiet zone at least as big as the start pattern before the barcode.
|
||||
// If this check would run off the left edge of the image, do not accept this barcode,
|
||||
// as it is very likely to be a false positive.
|
||||
let quietStart = start - (nextStart - start);
|
||||
if (quietStart >= 0) {
|
||||
foundStart = row.isRange(quietStart, start, false);
|
||||
}
|
||||
}
|
||||
return startRange;
|
||||
}
|
||||
|
||||
// @Override
|
||||
// public RXingResult decodeRow(int rowNumber, BitArray row, Map<DecodeHintType,?> hints)
|
||||
// throws NotFoundException, ChecksumException, FormatException {
|
||||
// return decodeRow(rowNumber, row, findStartGuardPattern(row), hints);
|
||||
// }
|
||||
|
||||
/**
|
||||
* <p>Like {@link #decodeRow(int, BitArray, Map)}, but
|
||||
* allows caller to inform method about where the UPC/EAN start pattern is
|
||||
* found. This allows this to be computed once and reused across many implementations.</p>
|
||||
*
|
||||
* @param rowNumber row index into the image
|
||||
* @param row encoding of the row of the barcode image
|
||||
* @param startGuardRange start/end column where the opening start pattern was found
|
||||
* @param hints optional hints that influence decoding
|
||||
* @return {@link RXingResult} encapsulating the result of decoding a barcode in the row
|
||||
* @throws NotFoundException if no potential barcode is found
|
||||
* @throws ChecksumException if a potential barcode is found but does not pass its checksum
|
||||
* @throws FormatException if a potential barcode is found but format is invalid
|
||||
*/
|
||||
fn decodeRowWithGuardRange(rowNumber:u32,
|
||||
row:&BitArray,
|
||||
startGuardRange:&[u32;2],
|
||||
hints:&crate::DecodingHintDictionary)
|
||||
-> Result<RXingResult,Exceptions> {
|
||||
|
||||
RXingResultPointCallback resultPointCallback = hints == null ? null :
|
||||
(RXingResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
|
||||
int symbologyIdentifier = 0;
|
||||
|
||||
if (resultPointCallback != null) {
|
||||
resultPointCallback.foundPossibleRXingResultPoint(new RXingResultPoint(
|
||||
(startGuardRange[0] + startGuardRange[1]) / 2.0f, rowNumber
|
||||
));
|
||||
}
|
||||
|
||||
StringBuilder result = decodeRowStringBuffer;
|
||||
result.setLength(0);
|
||||
int endStart = decodeMiddle(row, startGuardRange, result);
|
||||
|
||||
if (resultPointCallback != null) {
|
||||
resultPointCallback.foundPossibleRXingResultPoint(new RXingResultPoint(
|
||||
endStart, rowNumber
|
||||
));
|
||||
}
|
||||
|
||||
int[] endRange = decodeEnd(row, endStart);
|
||||
|
||||
if (resultPointCallback != null) {
|
||||
resultPointCallback.foundPossibleRXingResultPoint(new RXingResultPoint(
|
||||
(endRange[0] + endRange[1]) / 2.0f, rowNumber
|
||||
));
|
||||
}
|
||||
|
||||
|
||||
// Make sure there is a quiet zone at least as big as the end pattern after the barcode. The
|
||||
// spec might want more whitespace, but in practice this is the maximum we can count on.
|
||||
int end = endRange[1];
|
||||
int quietEnd = end + (end - endRange[0]);
|
||||
if (quietEnd >= row.getSize() || !row.isRange(end, quietEnd, false)) {
|
||||
throw NotFoundException.getNotFoundInstance();
|
||||
}
|
||||
|
||||
String resultString = result.toString();
|
||||
// UPC/EAN should never be less than 8 chars anyway
|
||||
if (resultString.length() < 8) {
|
||||
throw FormatException.getFormatInstance();
|
||||
}
|
||||
if (!checkChecksum(resultString)) {
|
||||
throw ChecksumException.getChecksumInstance();
|
||||
}
|
||||
|
||||
float left = (startGuardRange[1] + startGuardRange[0]) / 2.0f;
|
||||
float right = (endRange[1] + endRange[0]) / 2.0f;
|
||||
BarcodeFormat format = getBarcodeFormat();
|
||||
RXingResult decodeRXingResult = new RXingResult(resultString,
|
||||
null, // no natural byte representation for these barcodes
|
||||
new RXingResultPoint[]{
|
||||
new RXingResultPoint(left, rowNumber),
|
||||
new RXingResultPoint(right, rowNumber)},
|
||||
format);
|
||||
|
||||
int extensionLength = 0;
|
||||
|
||||
try {
|
||||
RXingResult extensionRXingResult = extensionReader.decodeRow(rowNumber, row, endRange[1]);
|
||||
decodeRXingResult.putMetadata(RXingResultMetadataType.UPC_EAN_EXTENSION, extensionRXingResult.getText());
|
||||
decodeRXingResult.putAllMetadata(extensionRXingResult.getRXingResultMetadata());
|
||||
decodeRXingResult.addRXingResultPoints(extensionRXingResult.getRXingResultPoints());
|
||||
extensionLength = extensionRXingResult.getText().length();
|
||||
} catch (ReaderException re) {
|
||||
// continue
|
||||
}
|
||||
|
||||
int[] allowedExtensions =
|
||||
hints == null ? null : (int[]) hints.get(DecodeHintType.ALLOWED_EAN_EXTENSIONS);
|
||||
if (allowedExtensions != null) {
|
||||
boolean valid = false;
|
||||
for (int length : allowedExtensions) {
|
||||
if (extensionLength == length) {
|
||||
valid = true;
|
||||
break;
|
||||
fn findStartGuardPattern(row: &BitArray) -> Result<[usize; 2], Exceptions>
|
||||
where
|
||||
Self: Sized,
|
||||
{
|
||||
let mut foundStart = false;
|
||||
let mut startRange = [0; 2]; //= null;
|
||||
let mut nextStart = 0;
|
||||
let mut counters = [0_u32; 3]; //vec![0_u32;START_END_PATTERN.len()];
|
||||
while !foundStart {
|
||||
counters.fill(0);
|
||||
// Arrays.fill(counters, 0, START_END_PATTERN.len(), 0);
|
||||
startRange = Self::findGuardPatternWithCounters(
|
||||
row,
|
||||
nextStart,
|
||||
false,
|
||||
&START_END_PATTERN,
|
||||
&mut counters,
|
||||
)?;
|
||||
let start = startRange[0];
|
||||
nextStart = startRange[1];
|
||||
// Make sure there is a quiet zone at least as big as the start pattern before the barcode.
|
||||
// If this check would run off the left edge of the image, do not accept this barcode,
|
||||
// as it is very likely to be a false positive.
|
||||
let quietStart = start as isize - (nextStart as isize - start as isize);
|
||||
if quietStart >= 0 {
|
||||
foundStart = row.isRange(quietStart as usize, start, false)?;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!valid) {
|
||||
throw NotFoundException.getNotFoundInstance();
|
||||
}
|
||||
|
||||
Ok(startRange)
|
||||
}
|
||||
|
||||
if (format == BarcodeFormat.EAN_13 || format == BarcodeFormat.UPC_A) {
|
||||
String countryID = eanManSupport.lookupCountryIdentifier(resultString);
|
||||
if (countryID != null) {
|
||||
decodeRXingResult.putMetadata(RXingResultMetadataType.POSSIBLE_COUNTRY, countryID);
|
||||
}
|
||||
}
|
||||
if (format == BarcodeFormat.EAN_8) {
|
||||
symbologyIdentifier = 4;
|
||||
// @Override
|
||||
// public RXingResult decodeRow(int rowNumber, BitArray row, Map<DecodeHintType,?> hints)
|
||||
// throws NotFoundException, ChecksumException, FormatException {
|
||||
// return decodeRow(rowNumber, row, findStartGuardPattern(row), hints);
|
||||
// }
|
||||
|
||||
/**
|
||||
* <p>Like {@link #decodeRow(int, BitArray, Map)}, but
|
||||
* allows caller to inform method about where the UPC/EAN start pattern is
|
||||
* found. This allows this to be computed once and reused across many implementations.</p>
|
||||
*
|
||||
* @param rowNumber row index into the image
|
||||
* @param row encoding of the row of the barcode image
|
||||
* @param startGuardRange start/end column where the opening start pattern was found
|
||||
* @param hints optional hints that influence decoding
|
||||
* @return {@link RXingResult} encapsulating the result of decoding a barcode in the row
|
||||
* @throws NotFoundException if no potential barcode is found
|
||||
* @throws ChecksumException if a potential barcode is found but does not pass its checksum
|
||||
* @throws FormatException if a potential barcode is found but format is invalid
|
||||
*/
|
||||
fn decodeRowWithGuardRange(
|
||||
&self,
|
||||
rowNumber: u32,
|
||||
row: &BitArray,
|
||||
startGuardRange: &[usize; 2],
|
||||
hints: &crate::DecodingHintDictionary,
|
||||
) -> Result<RXingResult, Exceptions>
|
||||
where
|
||||
Self: Sized,
|
||||
{
|
||||
let resultPointCallback = hints.get(&DecodeHintType::NEED_RESULT_POINT_CALLBACK);
|
||||
let mut symbologyIdentifier = 0;
|
||||
|
||||
if let Some(DecodeHintValue::NeedResultPointCallback(cb)) = resultPointCallback {
|
||||
cb(&RXingResultPoint::new(
|
||||
(startGuardRange[0] + startGuardRange[1]) as f32 / 2.0,
|
||||
rowNumber as f32,
|
||||
));
|
||||
}
|
||||
|
||||
let mut result = String::new(); //decodeRowStringBuffer;
|
||||
let endStart = self.decodeMiddle(row, startGuardRange, &mut result)?;
|
||||
|
||||
if let Some(DecodeHintValue::NeedResultPointCallback(cb)) = resultPointCallback {
|
||||
cb(&RXingResultPoint::new(endStart as f32, rowNumber as f32));
|
||||
}
|
||||
|
||||
let endRange = Self::decodeEnd(row, endStart)?;
|
||||
|
||||
if let Some(DecodeHintValue::NeedResultPointCallback(cb)) = resultPointCallback {
|
||||
cb(&RXingResultPoint::new(
|
||||
(endRange[0] + endRange[1]) as f32 / 2.0,
|
||||
rowNumber as f32,
|
||||
));
|
||||
}
|
||||
|
||||
// Make sure there is a quiet zone at least as big as the end pattern after the barcode. The
|
||||
// spec might want more whitespace, but in practice this is the maximum we can count on.
|
||||
let end = endRange[1];
|
||||
let quietEnd = end + (end - endRange[0]);
|
||||
if quietEnd >= row.getSize() || !row.isRange(end, quietEnd, false)? {
|
||||
return Err(Exceptions::NotFoundException("".to_owned()));
|
||||
}
|
||||
|
||||
let resultString = result;
|
||||
// UPC/EAN should never be less than 8 chars anyway
|
||||
if resultString.chars().count() < 8 {
|
||||
return Err(Exceptions::FormatException("".to_owned()));
|
||||
}
|
||||
if !self.checkChecksum(&resultString)? {
|
||||
return Err(Exceptions::ChecksumException("".to_owned()));
|
||||
}
|
||||
|
||||
let left = (startGuardRange[1] + startGuardRange[0]) as f32 / 2.0;
|
||||
let right: f32 = (endRange[1] + endRange[0]) as f32 / 2.0;
|
||||
let format = self.getBarcodeFormat();
|
||||
let mut decodeRXingResult = RXingResult::new(
|
||||
&resultString,
|
||||
Vec::new(), // no natural byte representation for these barcodes
|
||||
vec![
|
||||
RXingResultPoint::new(left, rowNumber as f32),
|
||||
RXingResultPoint::new(right, rowNumber as f32),
|
||||
],
|
||||
format,
|
||||
);
|
||||
|
||||
let mut extensionLength = 0;
|
||||
|
||||
let mut attempt = || -> Result<(), Exceptions> {
|
||||
let extensionRXingResult =
|
||||
UPC_EAN_EXTENSION_SUPPORT.decodeRow(rowNumber, row, endRange[1])?;
|
||||
|
||||
decodeRXingResult.putMetadata(
|
||||
RXingResultMetadataType::UPC_EAN_EXTENSION,
|
||||
RXingResultMetadataValue::UpcEanExtension(extensionRXingResult.getText().clone()),
|
||||
);
|
||||
decodeRXingResult.putAllMetadata(extensionRXingResult.getRXingResultMetadata().clone());
|
||||
decodeRXingResult
|
||||
.addRXingResultPoints(&mut extensionRXingResult.getRXingResultPoints().clone());
|
||||
extensionLength = extensionRXingResult.getText().chars().count();
|
||||
Ok(())
|
||||
};
|
||||
|
||||
let try_result = attempt();
|
||||
// if let Err(Exceptions::ReaderException(_)) = try_result {
|
||||
// } else if try_result.is_err() {
|
||||
// return Err(try_result.err().unwrap());
|
||||
// }
|
||||
|
||||
// try {
|
||||
// RXingResult extensionRXingResult = extensionReader.decodeRow(rowNumber, row, endRange[1]);
|
||||
// decodeRXingResult.putMetadata(RXingResultMetadataType.UPC_EAN_EXTENSION, extensionRXingResult.getText());
|
||||
// decodeRXingResult.putAllMetadata(extensionRXingResult.getRXingResultMetadata());
|
||||
// decodeRXingResult.addRXingResultPoints(extensionRXingResult.getRXingResultPoints());
|
||||
// extensionLength = extensionRXingResult.getText().length();
|
||||
// } catch (ReaderException re) {
|
||||
// // continue
|
||||
// }
|
||||
|
||||
if let Some(DecodeHintValue::AllowedEanExtensions(allowedExtensions)) =
|
||||
hints.get(&DecodeHintType::ALLOWED_EAN_EXTENSIONS)
|
||||
{
|
||||
let mut valid = false;
|
||||
for length in allowedExtensions {
|
||||
// for (int length : allowedExtensions) {
|
||||
if extensionLength == *length as usize {
|
||||
valid = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if !valid {
|
||||
return Err(Exceptions::NotFoundException("".to_owned()));
|
||||
}
|
||||
}
|
||||
// let allowedExtensions =
|
||||
// hints == null ? null : (int[]) hints.get(DecodeHintType.ALLOWED_EAN_EXTENSIONS);
|
||||
// if (allowedExtensions != null) {
|
||||
// let valid = false;
|
||||
// for (int length : allowedExtensions) {
|
||||
// if (extensionLength == length) {
|
||||
// valid = true;
|
||||
// break;
|
||||
// }
|
||||
// }
|
||||
// if (!valid) {
|
||||
// return Err(Exceptions::NotFoundException("".to_owned()));
|
||||
// }
|
||||
// }
|
||||
|
||||
if format == BarcodeFormat::EAN_13 || format == BarcodeFormat::UPC_A {
|
||||
let countryID = EAN_MANUFACTURER_SUPPORT.lookupCountryIdentifier(&resultString);
|
||||
if let Some(cid) = countryID {
|
||||
decodeRXingResult.putMetadata(
|
||||
RXingResultMetadataType::POSSIBLE_COUNTRY,
|
||||
RXingResultMetadataValue::PossibleCountry(cid),
|
||||
);
|
||||
}
|
||||
}
|
||||
if format == BarcodeFormat::EAN_8 {
|
||||
symbologyIdentifier = 4;
|
||||
}
|
||||
|
||||
decodeRXingResult.putMetadata(
|
||||
RXingResultMetadataType::SYMBOLOGY_IDENTIFIER,
|
||||
RXingResultMetadataValue::SymbologyIdentifier(format!("]E{}", symbologyIdentifier)),
|
||||
);
|
||||
|
||||
Ok(decodeRXingResult)
|
||||
}
|
||||
|
||||
decodeRXingResult.putMetadata(RXingResultMetadataType.SYMBOLOGY_IDENTIFIER, "]E" + symbologyIdentifier);
|
||||
|
||||
return decodeRXingResult;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param s string of digits to check
|
||||
* @return {@link #checkStandardUPCEANChecksum(CharSequence)}
|
||||
* @throws FormatException if the string does not contain only digits
|
||||
*/
|
||||
fn checkChecksum(&self, s:&str) -> Result<bool,Exceptions> {
|
||||
Self::checkStandardUPCEANChecksum(s)
|
||||
}
|
||||
|
||||
/**
|
||||
* Computes the UPC/EAN checksum on a string of digits, and reports
|
||||
* whether the checksum is correct or not.
|
||||
*
|
||||
* @param s string of digits to check
|
||||
* @return true iff string of digits passes the UPC/EAN checksum algorithm
|
||||
* @throws FormatException if the string does not contain only digits
|
||||
*/
|
||||
fn checkStandardUPCEANChecksum( s:&str) -> Result<bool,Exceptions> {
|
||||
let length = s.len();
|
||||
if length == 0 {
|
||||
return Ok(false);
|
||||
/**
|
||||
* @param s string of digits to check
|
||||
* @return {@link #checkStandardUPCEANChecksum(CharSequence)}
|
||||
* @throws FormatException if the string does not contain only digits
|
||||
*/
|
||||
fn checkChecksum(&self, s: &str) -> Result<bool, Exceptions> {
|
||||
Self::checkStandardUPCEANChecksum(s)
|
||||
}
|
||||
let check = Character.digit(s.charAt(length - 1), 10);
|
||||
return getStandardUPCEANChecksum(s.subSequence(0, length - 1)) == check;
|
||||
}
|
||||
|
||||
fn getStandardUPCEANChecksum( s:&str) -> Result<u32,Exceptions> {
|
||||
let length = s.chars().count();
|
||||
let sum = 0;
|
||||
let mut i = length - 1;
|
||||
while i >= 0 {
|
||||
// for (int i = length - 1; i >= 0; i -= 2) {
|
||||
let digit = s.charAt(i) - '0';
|
||||
if (digit < 0 || digit > 9) {
|
||||
throw FormatException.getFormatInstance();
|
||||
}
|
||||
sum += digit;
|
||||
/**
|
||||
* Computes the UPC/EAN checksum on a string of digits, and reports
|
||||
* whether the checksum is correct or not.
|
||||
*
|
||||
* @param s string of digits to check
|
||||
* @return true iff string of digits passes the UPC/EAN checksum algorithm
|
||||
* @throws FormatException if the string does not contain only digits
|
||||
*/
|
||||
fn checkStandardUPCEANChecksum(s: &str) -> Result<bool, Exceptions> {
|
||||
let length = s.len();
|
||||
if length == 0 {
|
||||
return Ok(false);
|
||||
}
|
||||
let char_in_question = s.chars().nth(length - 1).unwrap();
|
||||
let check = char_in_question.is_digit(10);
|
||||
// let check = Character.digit(s.charAt(length - 1), 10);
|
||||
|
||||
i -= 2;
|
||||
let check_against = &s[..length - 1]; //s.subSequence(0, length - 1);
|
||||
let calculated_checksum = Self::getStandardUPCEANChecksum(check_against)?;
|
||||
|
||||
Ok( calculated_checksum == if check { char_in_question.to_digit(10).unwrap() } else { u32::MAX })
|
||||
}
|
||||
sum *= 3;
|
||||
let mut i = length - 2;
|
||||
while i >= 0 {
|
||||
// for (int i = length - 2; i >= 0; i -= 2) {
|
||||
let digit = s.charAt(i) - '0';
|
||||
if (digit < 0 || digit > 9) {
|
||||
throw FormatException.getFormatInstance();
|
||||
}
|
||||
sum += digit;
|
||||
|
||||
i -= 2;
|
||||
fn getStandardUPCEANChecksum(s: &str) -> Result<u32, Exceptions> {
|
||||
let length = s.chars().count();
|
||||
let mut sum = 0;
|
||||
let mut i = length as isize - 1;
|
||||
while i >= 0 {
|
||||
// for (int i = length - 1; i >= 0; i -= 2) {
|
||||
let digit = (s.chars().nth(i as usize).unwrap() as i32) - ('0' as i32);
|
||||
if digit < 0 || digit > 9 {
|
||||
return Err(Exceptions::FormatException("".to_owned()));
|
||||
}
|
||||
sum += digit;
|
||||
|
||||
i -= 2;
|
||||
}
|
||||
sum *= 3;
|
||||
let mut i = length as isize - 2;
|
||||
while i >= 0 {
|
||||
// for (int i = length - 2; i >= 0; i -= 2) {
|
||||
let digit = (s.chars().nth(i as usize).unwrap() as i32) - ('0' as i32);
|
||||
if digit < 0 || digit > 9 {
|
||||
return Err(Exceptions::FormatException("".to_owned()));
|
||||
}
|
||||
sum += digit;
|
||||
|
||||
i -= 2;
|
||||
}
|
||||
Ok(((1000 - sum) % 10) as u32)
|
||||
}
|
||||
return (1000 - sum) % 10;
|
||||
}
|
||||
|
||||
fn decodeEnd(&self, row:&BitArray, endStart:usize) -> Result<[usize;2],Exceptions> {
|
||||
Self::findGuardPattern(row, endStart, false, START_END_PATTERN)
|
||||
}
|
||||
fn decodeEnd(row: &BitArray, endStart: usize) -> Result<[usize; 2], Exceptions>
|
||||
where
|
||||
Self: Sized,
|
||||
{
|
||||
Self::findGuardPattern(row, endStart, false, &START_END_PATTERN)
|
||||
}
|
||||
|
||||
fn findGuardPattern( row:&BitArray,
|
||||
rowOffset:usize,
|
||||
whiteFirst:bool,
|
||||
pattern:[u32;3]) -> Result<[usize;2],Exceptions> {
|
||||
Self::findGuardPatternWithCounters(row, rowOffset, whiteFirst, pattern, vec![0u32;pattern.len()])
|
||||
}
|
||||
fn findGuardPattern(
|
||||
row: &BitArray,
|
||||
rowOffset: usize,
|
||||
whiteFirst: bool,
|
||||
pattern: &[u32],
|
||||
) -> Result<[usize; 2], Exceptions>
|
||||
where
|
||||
Self: Sized,
|
||||
{
|
||||
Self::findGuardPatternWithCounters(row, rowOffset, whiteFirst, pattern, &mut vec![0u32; pattern.len()])
|
||||
}
|
||||
|
||||
/**
|
||||
* @param row row of black/white values to search
|
||||
* @param rowOffset position to start search
|
||||
* @param whiteFirst if true, indicates that the pattern specifies white/black/white/...
|
||||
* pixel counts, otherwise, it is interpreted as black/white/black/...
|
||||
* @param pattern pattern of counts of number of black and white pixels that are being
|
||||
* searched for as a pattern
|
||||
* @param counters array of counters, as long as pattern, to re-use
|
||||
* @return start/end horizontal offset of guard pattern, as an array of two ints
|
||||
* @throws NotFoundException if pattern is not found
|
||||
*/
|
||||
fn findGuardPatternWithCounters( row:&BitArray,
|
||||
rowOffset:usize,
|
||||
whiteFirst:bool,
|
||||
pattern:&[u32;3],
|
||||
counters:&Vec<u32>) -> Result<[usize;2],Exceptions> {
|
||||
let width = row.getSize();
|
||||
rowOffset = if whiteFirst {row.getNextUnset(rowOffset)} else {row.getNextSet(rowOffset)};
|
||||
let counterPosition = 0;
|
||||
let patternStart = rowOffset;
|
||||
let patternLength = pattern.len();
|
||||
let isWhite = whiteFirst;
|
||||
for x in rowOffset ..width {
|
||||
// for (int x = rowOffset; x < width; x++) {
|
||||
if (row.get(x) != isWhite) {
|
||||
counters[counterPosition]+=1;
|
||||
} else {
|
||||
if (counterPosition == patternLength - 1) {
|
||||
if (Self::patternMatchVariance(counters, pattern, MAX_INDIVIDUAL_VARIANCE) < MAX_AVG_VARIANCE) {
|
||||
return [patternStart, x];
|
||||
}
|
||||
patternStart += counters[0] + counters[1];
|
||||
System.arraycopy(counters, 2, counters, 0, counterPosition - 1);
|
||||
counters[counterPosition - 1] = 0;
|
||||
counters[counterPosition] = 0;
|
||||
counterPosition-=1;
|
||||
/**
|
||||
* @param row row of black/white values to search
|
||||
* @param rowOffset position to start search
|
||||
* @param whiteFirst if true, indicates that the pattern specifies white/black/white/...
|
||||
* pixel counts, otherwise, it is interpreted as black/white/black/...
|
||||
* @param pattern pattern of counts of number of black and white pixels that are being
|
||||
* searched for as a pattern
|
||||
* @param counters array of counters, as long as pattern, to re-use
|
||||
* @return start/end horizontal offset of guard pattern, as an array of two ints
|
||||
* @throws NotFoundException if pattern is not found
|
||||
*/
|
||||
fn findGuardPatternWithCounters(
|
||||
row: &BitArray,
|
||||
rowOffset: usize,
|
||||
whiteFirst: bool,
|
||||
pattern: &[u32],
|
||||
counters: &mut [u32],
|
||||
) -> Result<[usize; 2], Exceptions>
|
||||
where
|
||||
Self: Sized,
|
||||
{
|
||||
let width = row.getSize();
|
||||
let rowOffset = if whiteFirst {
|
||||
row.getNextUnset(rowOffset)
|
||||
} else {
|
||||
counterPosition+=1;
|
||||
row.getNextSet(rowOffset)
|
||||
};
|
||||
let mut counterPosition = 0;
|
||||
let mut patternStart = rowOffset;
|
||||
let patternLength = pattern.len();
|
||||
let mut isWhite = whiteFirst;
|
||||
for x in rowOffset..width {
|
||||
// for (int x = rowOffset; x < width; x++) {
|
||||
if row.get(x) != isWhite {
|
||||
counters[counterPosition] += 1;
|
||||
} else {
|
||||
if counterPosition == patternLength - 1 {
|
||||
if Self::patternMatchVariance(counters, pattern, MAX_INDIVIDUAL_VARIANCE)
|
||||
< MAX_AVG_VARIANCE
|
||||
{
|
||||
return Ok([patternStart, x]);
|
||||
}
|
||||
patternStart += (counters[0] + counters[1]) as usize;
|
||||
let slc = &counters[2..(counterPosition - 1 + 2)].to_vec();
|
||||
counters[..(counterPosition - 1)].copy_from_slice(slc);
|
||||
// System.arraycopy(counters, 2, counters, 0, counterPosition - 1);
|
||||
counters[counterPosition - 1] = 0;
|
||||
counters[counterPosition] = 0;
|
||||
counterPosition -= 1;
|
||||
} else {
|
||||
counterPosition += 1;
|
||||
}
|
||||
counters[counterPosition] = 1;
|
||||
isWhite = !isWhite;
|
||||
}
|
||||
}
|
||||
counters[counterPosition] = 1;
|
||||
isWhite = !isWhite;
|
||||
}
|
||||
|
||||
Err(Exceptions::NotFoundException("".to_owned()))
|
||||
}
|
||||
throw NotFoundException.getNotFoundInstance();
|
||||
}
|
||||
|
||||
/**
|
||||
* Attempts to decode a single UPC/EAN-encoded digit.
|
||||
*
|
||||
* @param row row of black/white values to decode
|
||||
* @param counters the counts of runs of observed black/white/black/... values
|
||||
* @param rowOffset horizontal offset to start decoding from
|
||||
* @param patterns the set of patterns to use to decode -- sometimes different encodings
|
||||
* for the digits 0-9 are used, and this indicates the encodings for 0 to 9 that should
|
||||
* be used
|
||||
* @return horizontal offset of first pixel beyond the decoded digit
|
||||
* @throws NotFoundException if digit cannot be decoded
|
||||
*/
|
||||
fn decodeDigit( row:&BitArray, counters:&Vec<u32>, rowOffset:usize, patterns:&Vec<Vec<u32>>)
|
||||
-> Result<u32,Exceptions> {
|
||||
Self::recordPattern(row, rowOffset, counters);
|
||||
let bestVariance = MAX_AVG_VARIANCE; // worst variance we'll accept
|
||||
let bestMatch = -1_isize;
|
||||
let max = patterns.len();
|
||||
for i in 0..max {
|
||||
// for (int i = 0; i < max; i++) {
|
||||
let pattern = patterns[i];
|
||||
let variance:f32 = Self::patternMatchVariance(counters, pattern, MAX_INDIVIDUAL_VARIANCE);
|
||||
if (variance < bestVariance) {
|
||||
bestVariance = variance;
|
||||
bestMatch = i;
|
||||
}
|
||||
/**
|
||||
* Attempts to decode a single UPC/EAN-encoded digit.
|
||||
*
|
||||
* @param row row of black/white values to decode
|
||||
* @param counters the counts of runs of observed black/white/black/... values
|
||||
* @param rowOffset horizontal offset to start decoding from
|
||||
* @param patterns the set of patterns to use to decode -- sometimes different encodings
|
||||
* for the digits 0-9 are used, and this indicates the encodings for 0 to 9 that should
|
||||
* be used
|
||||
* @return horizontal offset of first pixel beyond the decoded digit
|
||||
* @throws NotFoundException if digit cannot be decoded
|
||||
*/
|
||||
fn decodeDigit(
|
||||
row: &BitArray,
|
||||
counters: &mut [u32; 4],
|
||||
rowOffset: usize,
|
||||
patterns: &[[u32; 4]],
|
||||
) -> Result<usize, Exceptions>
|
||||
where
|
||||
Self: Sized,
|
||||
{
|
||||
Self::recordPattern(row, rowOffset, counters)?;
|
||||
let mut bestVariance = MAX_AVG_VARIANCE; // worst variance we'll accept
|
||||
let mut bestMatch = -1_isize;
|
||||
let max = patterns.len();
|
||||
for i in 0..max {
|
||||
// for (int i = 0; i < max; i++) {
|
||||
let pattern = &patterns[i];
|
||||
let variance: f32 =
|
||||
Self::patternMatchVariance(counters, pattern, MAX_INDIVIDUAL_VARIANCE);
|
||||
if variance < bestVariance {
|
||||
bestVariance = variance;
|
||||
bestMatch = i as isize;
|
||||
}
|
||||
}
|
||||
if bestMatch >= 0 {
|
||||
Ok(bestMatch as usize)
|
||||
} else {
|
||||
Err(Exceptions::NotFoundException("".to_owned()))
|
||||
}
|
||||
}
|
||||
if (bestMatch >= 0) {
|
||||
return bestMatch;
|
||||
} else {
|
||||
throw NotFoundException.getNotFoundInstance();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the format of this decoder.
|
||||
*
|
||||
* @return The 1D format.
|
||||
*/
|
||||
fn getBarcodeFormat() -> BarcodeFormat;
|
||||
|
||||
/**
|
||||
* Subclasses override this to decode the portion of a barcode between the start
|
||||
* and end guard patterns.
|
||||
*
|
||||
* @param row row of black/white values to search
|
||||
* @param startRange start/end offset of start guard pattern
|
||||
* @param resultString {@link StringBuilder} to append decoded chars to
|
||||
* @return horizontal offset of first pixel after the "middle" that was decoded
|
||||
* @throws NotFoundException if decoding could not complete successfully
|
||||
*/
|
||||
fn decodeMiddle( row:&BitArray,
|
||||
startRange:&[u32;2],
|
||||
resultString:&mut String) -> Result<u32,Exceptions>;
|
||||
/**
|
||||
* Get the format of this decoder.
|
||||
*
|
||||
* @return The 1D format.
|
||||
*/
|
||||
fn getBarcodeFormat(&self) -> BarcodeFormat;
|
||||
|
||||
/**
|
||||
* Subclasses override this to decode the portion of a barcode between the start
|
||||
* and end guard patterns.
|
||||
*
|
||||
* @param row row of black/white values to search
|
||||
* @param startRange start/end offset of start guard pattern
|
||||
* @param resultString {@link StringBuilder} to append decoded chars to
|
||||
* @return horizontal offset of first pixel after the "middle" that was decoded
|
||||
* @throws NotFoundException if decoding could not complete successfully
|
||||
*/
|
||||
fn decodeMiddle(
|
||||
&self,
|
||||
row: &BitArray,
|
||||
startRange: &[usize; 2],
|
||||
resultString: &mut String,
|
||||
) -> Result<usize, Exceptions>;
|
||||
}
|
||||
|
||||
pub struct StandIn;
|
||||
impl UPCEANReader for StandIn {
|
||||
fn getBarcodeFormat(&self) -> BarcodeFormat {
|
||||
todo!()
|
||||
}
|
||||
|
||||
fn decodeMiddle(
|
||||
&self,
|
||||
_row: &BitArray,
|
||||
_startRange: &[usize; 2],
|
||||
_resultString: &mut String,
|
||||
) -> Result<usize, Exceptions> {
|
||||
todo!()
|
||||
}
|
||||
}
|
||||
impl OneDReader for StandIn {
|
||||
fn decodeRow(
|
||||
&mut self,
|
||||
_rowNumber: u32,
|
||||
_row: &BitArray,
|
||||
_hints: &crate::DecodingHintDictionary,
|
||||
) -> Result<RXingResult, Exceptions> {
|
||||
todo!()
|
||||
}
|
||||
}
|
||||
|
||||
impl Reader for StandIn {
|
||||
fn decode(&mut self, _image: &crate::BinaryBitmap) -> Result<RXingResult, Exceptions> {
|
||||
todo!()
|
||||
}
|
||||
|
||||
fn decode_with_hints(
|
||||
&mut self,
|
||||
_image: &crate::BinaryBitmap,
|
||||
_hints: &crate::DecodingHintDictionary,
|
||||
) -> Result<RXingResult, Exceptions> {
|
||||
todo!()
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user