,
// }
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import java.util.Arrays;
/**
* Represents a 2D matrix of bits. In function arguments below, and throughout the common
* module, x is the column position, and y is the row position. The ordering is always x, y.
* The origin is at the top-left.
*
* Internally the bits are represented in a 1-D array of 32-bit ints. However, each row begins
* with a new int. This is done intentionally so that we can copy out a row into a BitArray very
* efficiently.
*
* The ordering of bits is row-major. Within each int, the least significant bits are used first,
* meaning they represent lower x values. This is compatible with BitArray's implementation.
*
* @author Sean Owen
* @author dswitkin@google.com (Daniel Switkin)
*/
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct BitMatrix {
width: u32,
height: u32,
row_size: usize,
bits: Vec,
}
impl BitMatrix {
/**
* Creates an empty square {@code BitMatrix}.
*
* @param dimension height and width
*/
pub fn with_single_dimension(dimension: u32) -> Self {
Self::new(dimension, dimension).unwrap()
}
/**
* Creates an empty {@code BitMatrix}.
*
* @param width bit matrix width
* @param height bit matrix height
*/
pub fn new(width: u32, height: u32) -> Result {
if width < 1 || height < 1 {
return Err(Exceptions::IllegalArgumentException(
"Both dimensions must be greater than 0".to_owned(),
));
}
Ok(Self {
width,
height,
row_size: ((width + 31) / 32) as usize,
bits: vec![0; (((width + 31) / 32) * height) as usize],
})
// this.width = width;
// this.height = height;
// this.rowSize = (width + 31) / 32;
// bits = new int[rowSize * height];
}
fn with_all_data(&self, width: u32, height: u32, rowSize: usize, bits: Vec) -> Self {
Self {
width,
height,
row_size: rowSize,
bits,
}
}
/**
* Interprets a 2D array of booleans as a {@code BitMatrix}, where "true" means an "on" bit.
*
* @param image bits of the image, as a row-major 2D array. Elements are arrays representing rows
* @return {@code BitMatrix} representation of image
*/
pub fn parse_bools(image: &Vec>) -> Self {
let height: u32 = image.len().try_into().unwrap();
let width: u32 = image[0].len().try_into().unwrap();
let mut bits = BitMatrix::new(width, height).unwrap();
for i in 0..height as usize {
//for (int i = 0; i < height; i++) {
let imageI = &image[i];
for j in 0..width as usize {
//for (int j = 0; j < width; j++) {
if imageI[j] {
bits.set(j as u32, i as u32);
}
}
}
return bits;
}
pub fn parse_strings(
string_representation: &str,
set_string: &str,
unset_string: &str,
) -> Result {
// cannot pass nulls in rust
// if (stringRepresentation == null) {
// throw new IllegalArgumentException();
// }
let mut bits = vec![false; string_representation.len()];
let mut bitsPos = 0;
let mut rowStartPos = 0;
let mut rowLength = 0; //-1;
let mut first_run = true;
let mut nRows = 0;
let mut pos = 0;
while pos < string_representation.len() {
if string_representation.chars().nth(pos).unwrap() == '\n'
|| string_representation.chars().nth(pos).unwrap() == '\r'
{
if bitsPos > rowStartPos {
//if rowLength == -1 {
if first_run {
first_run = false;
rowLength = bitsPos - rowStartPos;
} else if bitsPos - rowStartPos != rowLength {
return Err(Exceptions::IllegalArgumentException(
"row lengths do not match".to_owned(),
));
}
rowStartPos = bitsPos;
nRows += 1;
}
pos += 1;
} else if string_representation[pos..].starts_with(set_string) {
pos += set_string.len();
bits[bitsPos] = true;
bitsPos += 1;
} else if string_representation[pos..].starts_with(unset_string) {
pos += unset_string.len();
bits[bitsPos] = false;
bitsPos += 1;
} else {
return Err(Exceptions::IllegalArgumentException(format!(
"illegal character encountered: {}",
string_representation[pos..].to_owned()
)));
}
}
// no EOL at end?
if bitsPos > rowStartPos {
//if rowLength == -1 {
if first_run {
first_run = false;
rowLength = bitsPos - rowStartPos;
} else if bitsPos - rowStartPos != rowLength {
return Err(Exceptions::IllegalArgumentException(
"row lengths do not match".to_owned(),
));
}
nRows += 1;
}
let mut matrix = BitMatrix::new(rowLength.try_into().unwrap(), nRows)?;
for i in 0..bitsPos {
//for (int i = 0; i < bitsPos; i++) {
if bits[i] {
matrix.set(
(i % rowLength).try_into().unwrap(),
(i / rowLength).try_into().unwrap(),
);
}
}
return Ok(matrix);
}
/**
* Gets the requested bit, where true means black.
*
* @param x The horizontal component (i.e. which column)
* @param y The vertical component (i.e. which row)
* @return value of given bit in matrix
*/
pub fn get(&self, x: u32, y: u32) -> bool {
let offset = y as usize * self.row_size + (x as usize / 32);
return ((self.bits[offset] >> (x & 0x1f)) & 1) != 0;
}
/**
* Sets the given bit to true.
*
* @param x The horizontal component (i.e. which column)
* @param y The vertical component (i.e. which row)
*/
pub fn set(&mut self, x: u32, y: u32) {
let offset = y as usize * self.row_size + (x as usize / 32);
self.bits[offset] |= 1 << (x & 0x1f);
}
pub fn unset(&mut self, x: u32, y: u32) {
let offset = y as usize * self.row_size + (x as usize / 32);
self.bits[offset] &= !(1 << (x & 0x1f));
}
/**
* Flips the given bit.
*
* @param x The horizontal component (i.e. which column)
* @param y The vertical component (i.e. which row)
*/
pub fn flip_coords(&mut self, x: u32, y: u32) {
let offset = y as usize * self.row_size + (x as usize / 32);
self.bits[offset] ^= 1 << (x & 0x1f);
}
/**
* Flips every bit in the matrix.
*/
pub fn flip_self(&mut self) {
let max = self.bits.len();
for i in 0..max {
//for (int i = 0; i < max; i++) {
self.bits[i] = !self.bits[i];
}
}
/**
* Exclusive-or (XOR): Flip the bit in this {@code BitMatrix} if the corresponding
* mask bit is set.
*
* @param mask XOR mask
*/
pub fn xor(&mut self, mask: &BitMatrix) -> Result<(), Exceptions> {
if self.width != mask.width || self.height != mask.height || self.row_size != mask.row_size
{
return Err(Exceptions::IllegalArgumentException(
"input matrix dimensions do not match".to_owned(),
));
}
let rowArray = BitArray::with_size(self.width as usize);
for y in 0..self.height {
//for (int y = 0; y < height; y++) {
let offset = y as usize * self.row_size;
let tmp = mask.getRow(y, &rowArray);
let row = tmp.getBitArray();
for x in 0..self.row_size {
//for (int x = 0; x < rowSize; x++) {
self.bits[offset + x] ^= row[x];
}
}
Ok(())
}
/**
* Clears all bits (sets to false).
*/
pub fn clear(&mut self) {
let max = self.bits.len();
for i in 0..max {
//for (int i = 0; i < max; i++) {
self.bits[i] = 0;
}
}
/**
* Sets a square region of the bit matrix to true.
*
* @param left The horizontal position to begin at (inclusive)
* @param top The vertical position to begin at (inclusive)
* @param width The width of the region
* @param height The height of the region
*/
pub fn setRegion(
&mut self,
left: u32,
top: u32,
width: u32,
height: u32,
) -> Result<(), Exceptions> {
if top < 0 || left < 0 {
return Err(Exceptions::IllegalArgumentException(
"Left and top must be nonnegative".to_owned(),
));
}
if height < 1 || width < 1 {
return Err(Exceptions::IllegalArgumentException(
"Height and width must be at least 1".to_owned(),
));
}
let right = left + width;
let bottom = top + height;
if bottom > self.height || right > self.width {
return Err(Exceptions::IllegalArgumentException(
"The region must fit inside the matrix".to_owned(),
));
}
for y in top..bottom {
//for (int y = top; y < bottom; y++) {
let offset = y as usize * self.row_size;
for x in left..right {
//for (int x = left; x < right; x++) {
self.bits[offset + (x as usize / 32)] |= 1 << (x & 0x1f);
}
}
Ok(())
}
/**
* A fast method to retrieve one row of data from the matrix as a BitArray.
*
* @param y The row to retrieve
* @param row An optional caller-allocated BitArray, will be allocated if null or too small
* @return The resulting BitArray - this reference should always be used even when passing
* your own row
*/
pub fn getRow(&self, y: u32, row: &BitArray) -> BitArray {
let mut rw: BitArray = if row.getSize() < self.width as usize {
BitArray::with_size(self.width as usize)
} else {
let mut z = row.clone();
z.clear();
z
// row.clear();
// row.clone()
};
let offset = y as usize * self.row_size;
for x in 0..self.row_size {
//for (int x = 0; x < rowSize; x++) {
rw.setBulk(x * 32, self.bits[offset + x]);
}
return rw;
}
/**
* @param y row to set
* @param row {@link BitArray} to copy from
*/
pub fn setRow(&mut self, y: u32, row: &BitArray) {
return self.bits[y as usize * self.row_size..y as usize * self.row_size + self.row_size]
.clone_from_slice(&row.getBitArray()[0..self.row_size]);
//System.arraycopy(row.getBitArray(), 0, self.bits, y * self.rowSize, self.rowSize);
}
/**
* Modifies this {@code BitMatrix} to represent the same but rotated the given degrees (0, 90, 180, 270)
*
* @param degrees number of degrees to rotate through counter-clockwise (0, 90, 180, 270)
*/
pub fn rotate(&mut self, degrees: u32) -> Result<(), Exceptions> {
match degrees % 360 {
0 => Ok(()),
90 => {
self.rotate90();
Ok(())
}
180 => {
self.rotate180();
Ok(())
}
270 => {
self.rotate90();
self.rotate180();
Ok(())
}
_ => Err(Exceptions::IllegalArgumentException(
"degrees must be a multiple of 0, 90, 180, or 270".to_owned(),
)),
}
}
/**
* Modifies this {@code BitMatrix} to represent the same but rotated 180 degrees
*/
pub fn rotate180(&mut self) {
let mut topRow = BitArray::with_size(self.width as usize);
let mut bottomRow = BitArray::with_size(self.width as usize);
let mut maxHeight = (self.height + 1) / 2;
for i in 0..maxHeight {
//for (int i = 0; i < maxHeight; i++) {
topRow = self.getRow(i, &topRow);
let bottomRowIndex = self.height - 1 - i;
bottomRow = self.getRow(bottomRowIndex, &bottomRow);
topRow.reverse();
bottomRow.reverse();
self.setRow(i, &bottomRow);
self.setRow(bottomRowIndex, &topRow);
}
}
/**
* Modifies this {@code BitMatrix} to represent the same but rotated 90 degrees counterclockwise
*/
pub fn rotate90(&mut self) {
let mut newWidth = self.height;
let mut newHeight = self.width;
let mut newRowSize = (newWidth + 31) / 32;
let mut newBits = vec![0; (newRowSize * newHeight).try_into().unwrap()];
for y in 0..self.height {
//for (int y = 0; y < height; y++) {
for x in 0..self.width {
//for (int x = 0; x < width; x++) {
let offset = y as usize * self.row_size + (x as usize / 32);
if ((self.bits[offset] >> (x & 0x1f)) & 1) != 0 {
let newOffset: usize = ((newHeight - 1 - x) * newRowSize + (y / 32))
.try_into()
.unwrap();
newBits[newOffset] |= 1 << (y & 0x1f);
}
}
}
self.width = newWidth;
self.height = newHeight;
self.row_size = newRowSize.try_into().unwrap();
self.bits = newBits;
}
/**
* This is useful in detecting the enclosing rectangle of a 'pure' barcode.
*
* @return {@code left,top,width,height} enclosing rectangle of all 1 bits, or null if it is all white
*/
pub fn getEnclosingRectangle(&self) -> Option> {
let mut left = self.width;
let mut top = self.height;
// let right = -1;
// let bottom = -1;
let mut right: u32 = 0;
let mut bottom = 0;
for y in 0..self.height {
//for (int y = 0; y < height; y++) {
for x32 in 0..self.row_size {
//for (int x32 = 0; x32 < rowSize; x32++) {
let theBits = self.bits[y as usize * self.row_size + x32];
if theBits != 0 {
if y < top {
top = y;
}
if y > bottom {
bottom = y;
}
if x32 * 32 < left.try_into().unwrap() {
let mut bit = 0;
while (theBits << (31 - bit)) == 0 {
bit += 1;
}
if (x32 * 32 + bit) < left.try_into().unwrap() {
left = (x32 * 32 + bit).try_into().unwrap();
}
}
if x32 * 32 + 31 > right.try_into().unwrap() {
let mut bit = 31;
while (theBits >> bit) == 0 {
bit -= 1;
}
if (x32 * 32 + bit) > right.try_into().unwrap() {
right = (x32 * 32 + bit).try_into().unwrap();
}
}
}
}
}
if right < left || bottom < top {
return None;
}
return Some(vec![left, top, right - left + 1, bottom - top + 1]);
}
/**
* This is useful in detecting a corner of a 'pure' barcode.
*
* @return {@code x,y} coordinate of top-left-most 1 bit, or null if it is all white
*/
pub fn getTopLeftOnBit(&self) -> Option> {
let mut bitsOffset = 0;
while bitsOffset < self.bits.len() && self.bits[bitsOffset] == 0 {
bitsOffset += 1;
}
if bitsOffset == self.bits.len() {
return None;
}
let y = bitsOffset / self.row_size;
let mut x = (bitsOffset % self.row_size) * 32;
let theBits = self.bits[bitsOffset];
let mut bit = 0;
while (theBits << (31 - bit)) == 0 {
bit += 1;
}
x += bit;
return Some(vec![x as u32, y as u32]);
}
pub fn getBottomRightOnBit(&self) -> Option> {
let mut bitsOffset = self.bits.len() as i64 - 1;
while bitsOffset >= 0 && self.bits[bitsOffset as usize] == 0 {
bitsOffset -= 1;
}
if bitsOffset < 0 {
return None;
}
let y = bitsOffset as usize / self.row_size;
let mut x = (bitsOffset as usize % self.row_size) * 32;
let theBits = self.bits[bitsOffset as usize];
let mut bit = 31;
while (theBits >> bit) == 0 {
bit -= 1;
}
x += bit;
return Some(vec![x as u32, y as u32]);
}
/**
* @return The width of the matrix
*/
pub fn getWidth(&self) -> u32 {
return self.width;
}
/**
* @return The height of the matrix
*/
pub fn getHeight(&self) -> u32 {
return self.height;
}
/**
* @return The row size of the matrix
*/
pub fn getRowSize(&self) -> usize {
return self.row_size;
}
// @Override
// public boolean equals(Object o) {
// if (!(o instanceof BitMatrix)) {
// return false;
// }
// BitMatrix other = (BitMatrix) o;
// return width == other.width && height == other.height && rowSize == other.rowSize &&
// Arrays.equals(bits, other.bits);
// }
// @Override
// public int hashCode() {
// int hash = width;
// hash = 31 * hash + width;
// hash = 31 * hash + height;
// hash = 31 * hash + rowSize;
// hash = 31 * hash + Arrays.hashCode(bits);
// return hash;
// }
/**
* @param setString representation of a set bit
* @param unsetString representation of an unset bit
* @return string representation of entire matrix utilizing given strings
*/
pub fn toString(&self, setString: &str, unsetString: &str) -> String {
return self.buildToString(setString, unsetString, "\n");
}
/**
* @param setString representation of a set bit
* @param unsetString representation of an unset bit
* @param lineSeparator newline character in string representation
* @return string representation of entire matrix utilizing given strings and line separator
* @deprecated call {@link #toString(String,String)} only, which uses \n line separator always
*/
// @Deprecated
// public String toString(String setString, String unsetString, String lineSeparator) {
// return buildToString(setString, unsetString, lineSeparator);
// }
fn buildToString(&self, setString: &str, unsetString: &str, lineSeparator: &str) -> String {
let mut result =
String::with_capacity((self.height * (self.width + 1)).try_into().unwrap());
for y in 0..self.height {
//for (int y = 0; y < height; y++) {
for x in 0..self.width {
//for (int x = 0; x < width; x++) {
result.push_str(if self.get(x, y) {
setString
} else {
unsetString
});
}
result.push_str(lineSeparator);
}
return result;
}
// @Override
// public BitMatrix clone() {
// return new BitMatrix(width, height, rowSize, bits.clone());
// }
}
impl fmt::Display for BitMatrix {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.toString("X ", " "))
}
}
/*
* Copyright 2021 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//package com.google.zxing.common;
/**
* Interface to navigate a sequence of ECIs and bytes.
*
* @author Alex Geller
*/
pub trait ECIInput {
/**
* Returns the length of this input. The length is the number
* of {@code byte}s in or ECIs in the sequence.
*
* @return the number of {@code char}s in this sequence
*/
fn length(&self) -> usize;
/**
* Returns the {@code byte} value at the specified index. An index ranges from zero
* to {@code length() - 1}. The first {@code byte} value of the sequence is at
* index zero, the next at index one, and so on, as for array
* indexing.
*
* @param index the index of the {@code byte} value to be returned
*
* @return the specified {@code byte} value as character or the FNC1 character
*
* @throws IndexOutOfBoundsException
* if the {@code index} argument is negative or not less than
* {@code length()}
* @throws IllegalArgumentException
* if the value at the {@code index} argument is an ECI (@see #isECI)
*/
fn charAt(&self, index: usize) -> Result;
/**
* Returns a {@code CharSequence} that is a subsequence of this sequence.
* The subsequence starts with the {@code char} value at the specified index and
* ends with the {@code char} value at index {@code end - 1}. The length
* (in {@code char}s) of the
* returned sequence is {@code end - start}, so if {@code start == end}
* then an empty sequence is returned.
*
* @param start the start index, inclusive
* @param end the end index, exclusive
*
* @return the specified subsequence
*
* @throws IndexOutOfBoundsException
* if {@code start} or {@code end} are negative,
* if {@code end} is greater than {@code length()},
* or if {@code start} is greater than {@code end}
* @throws IllegalArgumentException
* if a value in the range {@code start}-{@code end} is an ECI (@see #isECI)
*/
fn subSequence(&self, start: usize, end: usize) -> Result, Exceptions>;
/**
* Determines if a value is an ECI
*
* @param index the index of the value
*
* @return true if the value at position {@code index} is an ECI
*
* @throws IndexOutOfBoundsException
* if the {@code index} argument is negative or not less than
* {@code length()}
*/
fn isECI(&self, index: u32) -> Result;
/**
* Returns the {@code int} ECI value at the specified index. An index ranges from zero
* to {@code length() - 1}. The first {@code byte} value of the sequence is at
* index zero, the next at index one, and so on, as for array
* indexing.
*
* @param index the index of the {@code int} value to be returned
*
* @return the specified {@code int} ECI value.
* The ECI specified the encoding of all bytes with a higher index until the
* next ECI or until the end of the input if no other ECI follows.
*
* @throws IndexOutOfBoundsException
* if the {@code index} argument is negative or not less than
* {@code length()}
* @throws IllegalArgumentException
* if the value at the {@code index} argument is not an ECI (@see #isECI)
*/
fn getECIValue(&self, index: usize) -> Result;
fn haveNCharacters(&self, index: usize, n: usize) -> bool;
}
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//package com.google.zxing.common;
/**
* This provides an easy abstraction to read bits at a time from a sequence of bytes, where the
* number of bits read is not often a multiple of 8.
*
* This class is thread-safe but not reentrant -- unless the caller modifies the bytes array
* it passed in, in which case all bets are off.
*
* @author Sean Owen
*/
pub struct BitSource {
bytes: Vec,
byte_offset: usize,
bit_offset: usize,
}
impl BitSource {
/**
* @param bytes bytes from which this will read bits. Bits will be read from the first byte first.
* Bits are read within a byte from most-significant to least-significant bit.
*/
pub fn new(bytes: Vec) -> Self {
Self {
bytes,
byte_offset: 0,
bit_offset: 0,
}
}
/**
* @return index of next bit in current byte which would be read by the next call to {@link #readBits(int)}.
*/
pub fn getBitOffset(&self) -> usize {
return self.bit_offset;
}
/**
* @return index of next byte in input byte array which would be read by the next call to {@link #readBits(int)}.
*/
pub fn getByteOffset(&self) -> usize {
return self.byte_offset;
}
/**
* @param numBits number of bits to read
* @return int representing the bits read. The bits will appear as the least-significant
* bits of the int
* @throws IllegalArgumentException if numBits isn't in [1,32] or more than is available
*/
pub fn readBits(&mut self, numBits: usize) -> Result {
if numBits < 1 || numBits > 32 || numBits > self.available() {
return Err(Exceptions::IllegalArgumentException(numBits.to_string()));
}
let mut result:u32 = 0;
let mut num_bits = numBits;
// First, read remainder from current byte
if self.bit_offset > 0 {
let bitsLeft = 8 - self.bit_offset;
let toRead = cmp::min(num_bits, bitsLeft);
let bitsToNotRead = bitsLeft - toRead;
let mask = (0xFF >> (8 - toRead)) << bitsToNotRead;
result = (self.bytes[self.byte_offset] & mask) as u32 >> bitsToNotRead;
num_bits -= toRead;
self.bit_offset += toRead;
if self.bit_offset == 8 {
self.bit_offset = 0;
self.byte_offset += 1;
}
}
// Next read whole bytes
if num_bits > 0 {
while num_bits >= 8 {
result = (result << 8) | (self.bytes[self.byte_offset] & 0xFF) as u32;
// result = ((result as u16) << 8) as u8 | (self.bytes[self.byte_offset]);
self.byte_offset += 1;
num_bits -= 8;
}
// Finally read a partial byte
if num_bits > 0 {
let bits_to_not_read = 8 - num_bits;
let mask = (0xFF >> bits_to_not_read) << bits_to_not_read;
result = (result << num_bits)
| ((self.bytes[self.byte_offset] & mask) as u32 >> bits_to_not_read);
self.bit_offset += num_bits;
}
}
return Ok(result);
}
/**
* @return number of bits that can be read successfully
*/
pub fn available(&self) -> usize {
return 8 * (self.bytes.len() - self.byte_offset) - self.bit_offset;
}
}
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
/**
* This class implements a perspective transform in two dimensions. Given four source and four
* destination points, it will compute the transformation implied between them. The code is based
* directly upon section 3.4.2 of George Wolberg's "Digital Image Warping"; see pages 54-56.
*
* @author Sean Owen
*/
pub struct PerspectiveTransform {
a11: f32,
a12: f32,
a13: f32,
a21: f32,
a22: f32,
a23: f32,
a31: f32,
a32: f32,
a33: f32,
}
impl PerspectiveTransform {
fn new(
a11: f32,
a21: f32,
a31: f32,
a12: f32,
a22: f32,
a32: f32,
a13: f32,
a23: f32,
a33: f32,
) -> Self {
Self {
a11,
a12,
a13,
a21,
a22,
a23,
a31,
a32,
a33,
}
}
pub fn quadrilateralToQuadrilateral(
x0: f32,
y0: f32,
x1: f32,
y1: f32,
x2: f32,
y2: f32,
x3: f32,
y3: f32,
x0p: f32,
y0p: f32,
x1p: f32,
y1p: f32,
x2p: f32,
y2p: f32,
x3p: f32,
y3p: f32,
) -> Self {
let q_to_s = PerspectiveTransform::quadrilateralToSquare(x0, y0, x1, y1, x2, y2, x3, y3);
let s_to_q =
PerspectiveTransform::squareToQuadrilateral(x0p, y0p, x1p, y1p, x2p, y2p, x3p, y3p);
return s_to_q.times(&q_to_s);
}
pub fn transform_points_single(&self, points: &mut [f32]) {
let a11 = self.a11;
let a12 = self.a12;
let a13 = self.a13;
let a21 = self.a21;
let a22 = self.a22;
let a23 = self.a23;
let a31 = self.a31;
let a32 = self.a32;
let a33 = self.a33;
let maxI = points.len() - 1; // points.length must be even
let mut i = 0;
while i < maxI {
// for (int i = 0; i < maxI; i += 2) {
let x = points[i];
let y = points[i + 1];
let denominator = a13 * x + a23 * y + a33;
points[i] = (a11 * x + a21 * y + a31) / denominator;
points[i + 1] = (a12 * x + a22 * y + a32) / denominator;
i += 2;
}
}
pub fn transform_points_double(&self, x_values: &mut [f32], y_valuess: &mut [f32]) {
let n = x_values.len();
for i in 0..n {
// for (int i = 0; i < n; i++) {
let x = x_values[i];
let y = y_valuess[i];
let denominator = self.a13 * x + self.a23 * y + self.a33;
x_values[i] = (self.a11 * x + self.a21 * y + self.a31) / denominator;
y_valuess[i] = (self.a12 * x + self.a22 * y + self.a32) / denominator;
}
}
pub fn squareToQuadrilateral(
x0: f32,
y0: f32,
x1: f32,
y1: f32,
x2: f32,
y2: f32,
x3: f32,
y3: f32,
) -> Self {
let dx3 = x0 - x1 + x2 - x3;
let dy3 = y0 - y1 + y2 - y3;
if dx3 == 0.0f32 && dy3 == 0.0f32 {
// Affine
return PerspectiveTransform::new(
x1 - x0,
x2 - x1,
x0,
y1 - y0,
y2 - y1,
y0,
0.0f32,
0.0f32,
1.0f32,
);
} else {
let dx1 = x1 - x2;
let dx2 = x3 - x2;
let dy1 = y1 - y2;
let dy2 = y3 - y2;
let denominator = dx1 * dy2 - dx2 * dy1;
let a13 = (dx3 * dy2 - dx2 * dy3) / denominator;
let a23 = (dx1 * dy3 - dx3 * dy1) / denominator;
return PerspectiveTransform::new(
x1 - x0 + a13 * x1,
x3 - x0 + a23 * x3,
x0,
y1 - y0 + a13 * y1,
y3 - y0 + a23 * y3,
y0,
a13,
a23,
1.0f32,
);
}
}
pub fn quadrilateralToSquare(
x0: f32,
y0: f32,
x1: f32,
y1: f32,
x2: f32,
y2: f32,
x3: f32,
y3: f32,
) -> Self {
// Here, the adjoint serves as the inverse
return PerspectiveTransform::squareToQuadrilateral(x0, y0, x1, y1, x2, y2, x3, y3)
.buildAdjoint();
}
fn buildAdjoint(&self) -> Self {
// Adjoint is the transpose of the cofactor matrix:
return PerspectiveTransform::new(
self.a22 * self.a33 - self.a23 * self.a32,
self.a23 * self.a31 - self.a21 * self.a33,
self.a21 * self.a32 - self.a22 * self.a31,
self.a13 * self.a32 - self.a12 * self.a33,
self.a11 * self.a33 - self.a13 * self.a31,
self.a12 * self.a31 - self.a11 * self.a32,
self.a12 * self.a23 - self.a13 * self.a22,
self.a13 * self.a21 - self.a11 * self.a23,
self.a11 * self.a22 - self.a12 * self.a21,
);
}
fn times(&self, other: &Self) -> Self {
return PerspectiveTransform::new(
self.a11 * other.a11 + self.a21 * other.a12 + self.a31 * other.a13,
self.a11 * other.a21 + self.a21 * other.a22 + self.a31 * other.a23,
self.a11 * other.a31 + self.a21 * other.a32 + self.a31 * other.a33,
self.a12 * other.a11 + self.a22 * other.a12 + self.a32 * other.a13,
self.a12 * other.a21 + self.a22 * other.a22 + self.a32 * other.a23,
self.a12 * other.a31 + self.a22 * other.a32 + self.a32 * other.a33,
self.a13 * other.a11 + self.a23 * other.a12 + self.a33 * other.a13,
self.a13 * other.a21 + self.a23 * other.a22 + self.a33 * other.a23,
self.a13 * other.a31 + self.a23 * other.a32 + self.a33 * other.a33,
);
}
}
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import java.util.List;
/**
* Encapsulates the result of decoding a matrix of bits. This typically
* applies to 2D barcode formats. For now it contains the raw bytes obtained,
* as well as a String interpretation of those bytes, if applicable.
*
* @author Sean Owen
*/
pub struct DecoderRXingResult {
rawBytes: Vec,
numBits: usize,
text: String,
byteSegments: Vec>,
ecLevel: String,
errorsCorrected: u64,
erasures: u64,
other: Box,
structuredAppendParity: i32,
structuredAppendSequenceNumber: i32,
symbologyModifier: u32,
}
impl DecoderRXingResult {
pub fn new(rawBytes: Vec, text: String, byteSegments: Vec>, ecLevel: String) -> Self {
Self::with_all(rawBytes, text, byteSegments, ecLevel, -2, -2, 0)
}
pub fn with_symbology(
rawBytes: Vec,
text: String,
byteSegments: Vec>,
ecLevel: String,
symbologyModifier: u32,
) -> Self {
Self::with_all(
rawBytes,
text,
byteSegments,
ecLevel,
-1,
-1,
symbologyModifier,
)
}
pub fn with_sa(
rawBytes: Vec,
text: String,
byteSegments: Vec>,
ecLevel: String,
saSequence: i32,
saParity: i32,
) -> Self {
Self::with_all(
rawBytes,
text,
byteSegments,
ecLevel,
saSequence,
saParity,
0,
)
}
pub fn with_all(
rawBytes: Vec,
text: String,
byteSegments:Vec>,
ecLevel: String,
saSequence: i32,
saParity: i32,
symbologyModifier: u32,
) -> Self {
let nb = rawBytes.len();
Self {
rawBytes,
numBits: nb,
text,
byteSegments,
ecLevel,
errorsCorrected: 0,
erasures: 0,
other: Box::new(false),
structuredAppendParity: saParity,
structuredAppendSequenceNumber: saSequence,
symbologyModifier,
}
}
/**
* @return raw bytes representing the result, or {@code null} if not applicable
*/
pub fn getRawBytes(&self) -> &Vec {
&self.rawBytes
}
/**
* @return how many bits of {@link #getRawBytes()} are valid; typically 8 times its length
* @since 3.3.0
*/
pub fn getNumBits(&self) -> usize {
self.numBits
}
/**
* @param numBits overrides the number of bits that are valid in {@link #getRawBytes()}
* @since 3.3.0
*/
pub fn setNumBits(&mut self, numBits: usize) {
self.numBits = numBits;
}
/**
* @return text representation of the result
*/
pub fn getText(&self) -> &str {
&self.text
}
/**
* @return list of byte segments in the result, or {@code null} if not applicable
*/
pub fn getByteSegments(&self) -> &Vec> {
&self.byteSegments
}
/**
* @return name of error correction level used, or {@code null} if not applicable
*/
pub fn getECLevel(&self) -> &str {
&self.ecLevel
}
/**
* @return number of errors corrected, or {@code null} if not applicable
*/
pub fn getErrorsCorrected(&self) -> u64 {
self.errorsCorrected
}
pub fn setErrorsCorrected(&mut self, errorsCorrected: u64) {
self.errorsCorrected = errorsCorrected;
}
/**
* @return number of erasures corrected, or {@code null} if not applicable
*/
pub fn getErasures(&self) -> u64 {
self.erasures
}
pub fn setErasures(&mut self, erasures: u64) {
self.erasures = erasures
}
/**
* @return arbitrary additional metadata
*/
pub fn getOther(&self) -> &Box {
&self.other
}
pub fn setOther(&mut self, other: Box) {
self.other = other
}
pub fn hasStructuredAppend(&self) -> bool {
self.structuredAppendParity >= 0 && self.structuredAppendSequenceNumber >= 0
}
pub fn getStructuredAppendParity(&self) -> i32 {
self.structuredAppendParity
}
pub fn getStructuredAppendSequenceNumber(&self) -> i32 {
self.structuredAppendSequenceNumber
}
pub fn getSymbologyModifier(&self) -> u32 {
self.symbologyModifier
}
}
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import java.io.ByteArrayOutputStream;
/**
* Class that lets one easily build an array of bytes by appending bits at a time.
*
* @author Sean Owen
*/
pub struct BitSourceBuilder {
output: Vec,
nextByte: u32,
bitsLeftInNextByte: u32,
}
impl BitSourceBuilder {
pub fn new() -> Self {
Self {
output: Vec::new(),
nextByte: 0,
bitsLeftInNextByte: 8,
}
}
pub fn write(&mut self, value: u32, numBits: u32) {
if numBits <= self.bitsLeftInNextByte {
self.nextByte <<= numBits;
self.nextByte |= value;
self.bitsLeftInNextByte -= numBits;
if self.bitsLeftInNextByte == 0 {
self.output.push(self.nextByte as u8);
self.nextByte = 0;
self.bitsLeftInNextByte = 8;
}
} else {
let bitsToWriteNow = self.bitsLeftInNextByte;
let numRestOfBits = numBits - bitsToWriteNow;
let mask = 0xFF >> (8 - bitsToWriteNow);
let valueToWriteNow = (value >> numRestOfBits) & mask;
self.write(valueToWriteNow, bitsToWriteNow);
self.write(value, numRestOfBits);
}
}
pub fn toByteArray(&mut self) -> &Vec {
if self.bitsLeftInNextByte < 8 {
self.write(0, self.bitsLeftInNextByte);
}
&self.output
}
}
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import com.google.zxing.NotFoundException;
/**
* Implementations of this class can, given locations of finder patterns for a QR code in an
* image, sample the right points in the image to reconstruct the QR code, accounting for
* perspective distortion. It is abstracted since it is relatively expensive and should be allowed
* to take advantage of platform-specific optimized implementations, like Sun's Java Advanced
* Imaging library, but which may not be available in other environments such as J2ME, and vice
* versa.
*
* The implementation used can be controlled by calling {@link #setGridSampler(GridSampler)}
* with an instance of a class which implements this interface.
*
* @author Sean Owen
*/
pub trait GridSampler {
// /**
// * Sets the implementation of GridSampler used by the library. One global
// * instance is stored, which may sound problematic. But, the implementation provided
// * ought to be appropriate for the entire platform, and all uses of this library
// * in the whole lifetime of the JVM. For instance, an Android activity can swap in
// * an implementation that takes advantage of native platform libraries.
// *
// * @param newGridSampler The platform-specific object to install.
// */
// public static void setGridSampler(GridSampler newGridSampler) {
// gridSampler = newGridSampler;
// }
// /**
// * @return the current implementation of GridSampler
// */
// public static GridSampler getInstance() {
// return gridSampler;
// }
/**
* Samples an image for a rectangular matrix of bits of the given dimension. The sampling
* transformation is determined by the coordinates of 4 points, in the original and transformed
* image space.
*
* @param image image to sample
* @param dimensionX width of {@link BitMatrix} to sample from image
* @param dimensionY height of {@link BitMatrix} to sample from image
* @param p1ToX point 1 preimage X
* @param p1ToY point 1 preimage Y
* @param p2ToX point 2 preimage X
* @param p2ToY point 2 preimage Y
* @param p3ToX point 3 preimage X
* @param p3ToY point 3 preimage Y
* @param p4ToX point 4 preimage X
* @param p4ToY point 4 preimage Y
* @param p1FromX point 1 image X
* @param p1FromY point 1 image Y
* @param p2FromX point 2 image X
* @param p2FromY point 2 image Y
* @param p3FromX point 3 image X
* @param p3FromY point 3 image Y
* @param p4FromX point 4 image X
* @param p4FromY point 4 image Y
* @return {@link BitMatrix} representing a grid of points sampled from the image within a region
* defined by the "from" parameters
* @throws NotFoundException if image can't be sampled, for example, if the transformation defined
* by the given points is invalid or results in sampling outside the image boundaries
*/
fn sample_grid_detailed(
&self,
image: &BitMatrix,
dimensionX: u32,
dimensionY: u32,
p1ToX: f32,
p1ToY: f32,
p2ToX: f32,
p2ToY: f32,
p3ToX: f32,
p3ToY: f32,
p4ToX: f32,
p4ToY: f32,
p1FromX: f32,
p1FromY: f32,
p2FromX: f32,
p2FromY: f32,
p3FromX: f32,
p3FromY: f32,
p4FromX: f32,
p4FromY: f32,
) -> Result;
fn sample_grid(
&self,
image: &BitMatrix,
dimensionX: u32,
dimensionY: u32,
transform: &PerspectiveTransform,
) -> Result;
/**
* Checks a set of points that have been transformed to sample points on an image against
* the image's dimensions to see if the point are even within the image.
*
* This method will actually "nudge" the endpoints back onto the image if they are found to be
* barely (less than 1 pixel) off the image. This accounts for imperfect detection of finder
* patterns in an image where the QR Code runs all the way to the image border.
*
* For efficiency, the method will check points from either end of the line until one is found
* to be within the image. Because the set of points are assumed to be linear, this is valid.
*
* @param image image into which the points should map
* @param points actual points in x1,y1,...,xn,yn form
* @throws NotFoundException if an endpoint is lies outside the image boundaries
*/
fn checkAndNudgePoints(&self, image: &BitMatrix, points: &mut [f32]) -> Result<(), Exceptions> {
let width = image.getWidth();
let height = image.getHeight();
// Check and nudge points from start until we see some that are OK:
let mut nudged = true;
let max_offset = points.len() - 1; // points.length must be even
let mut offset = 0;
while offset < max_offset && nudged {
// for (int offset = 0; offset < maxOffset && nudged; offset += 2) {
let x = points[offset] as i32;
let y = points[offset + 1] as i32;
if x < -1 || x > width.try_into().unwrap() || y < -1 || y > height.try_into().unwrap() {
return Err(Exceptions::NotFoundException(
"getNotFoundInstance".to_owned(),
));
}
nudged = false;
if x == -1 {
points[offset] = 0.0f32;
nudged = true;
} else if x == width.try_into().unwrap() {
points[offset] = width as f32 - 1f32;
nudged = true;
}
if y == -1 {
points[offset + 1] = 0.0f32;
nudged = true;
} else if (y == height.try_into().unwrap()) {
points[offset + 1] = height as f32 - 1f32;
nudged = true;
}
offset += 2;
}
// Check and nudge points from end:
nudged = true;
let mut offset = points.len() - 2;
while offset >= 0 && nudged {
// for (int offset = points.length - 2; offset >= 0 && nudged; offset -= 2) {
let x = points[offset] as i32;
let y = points[offset + 1] as i32;
if x < -1 || x > width.try_into().unwrap() || y < -1 || y > height.try_into().unwrap() {
return Err(Exceptions::NotFoundException(
"getNotFoundInstance".to_owned(),
));
}
nudged = false;
if x == -1 {
points[offset] = 0.0f32;
nudged = true;
} else if (x == width.try_into().unwrap()) {
points[offset] = width as f32 - 1f32;
nudged = true;
}
if y == -1 {
points[offset + 1] = 0.0f32;
nudged = true;
} else if (y == height.try_into().unwrap()) {
points[offset + 1] = height as f32 - 1f32;
nudged = true;
}
offset += 2;
}
Ok(())
}
}
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import com.google.zxing.NotFoundException;
/**
* @author Sean Owen
*/
pub struct DefaultGridSampler {}
impl GridSampler for DefaultGridSampler {
fn sample_grid_detailed(
&self,
image: &BitMatrix,
dimensionX: u32,
dimensionY: u32,
p1ToX: f32,
p1ToY: f32,
p2ToX: f32,
p2ToY: f32,
p3ToX: f32,
p3ToY: f32,
p4ToX: f32,
p4ToY: f32,
p1FromX: f32,
p1FromY: f32,
p2FromX: f32,
p2FromY: f32,
p3FromX: f32,
p3FromY: f32,
p4FromX: f32,
p4FromY: f32,
) -> Result {
let transform = PerspectiveTransform::quadrilateralToQuadrilateral(
p1ToX, p1ToY, p2ToX, p2ToY, p3ToX, p3ToY, p4ToX, p4ToY, p1FromX, p1FromY, p2FromX,
p2FromY, p3FromX, p3FromY, p4FromX, p4FromY,
);
self.sample_grid(image, dimensionX, dimensionY, &transform)
}
fn sample_grid(
&self,
image: &BitMatrix,
dimensionX: u32,
dimensionY: u32,
transform: &PerspectiveTransform,
) -> Result {
if dimensionX <= 0 || dimensionY <= 0 {
return Err(Exceptions::NotFoundException(
"getNotFoundInstance".to_owned(),
));
}
let mut bits = BitMatrix::new(dimensionX, dimensionY)?;
let mut points = vec![0_f32; 2 * dimensionX as usize];
for y in 0..dimensionY {
// for (int y = 0; y < dimensionY; y++) {
let max = points.len();
let i_value = y as f32 + 0.5f32;
let mut x = 0;
while x < max {
// for (int x = 0; x < max; x += 2) {
points[x] = (x as f32 / 2.0) + 0.5f32;
points[x + 1] = i_value;
x += 2;
}
transform.transform_points_single(&mut points);
// Quick check to see if points transformed to something inside the image;
// sufficient to check the endpoints
self.checkAndNudgePoints(image, &mut points)?;
// try {
let mut x = 0;
while x < max {
// for (int x = 0; x < max; x += 2) {
if image.get(points[x].floor() as u32, points[x + 1].floor() as u32) {
// Black(-ish) pixel
bits.set(x as u32 / 2, y);
}
x += 2;
}
// } catch (ArrayIndexOutOfBoundsException aioobe) {
// // This feels wrong, but, sometimes if the finder patterns are misidentified, the resulting
// // transform gets "twisted" such that it maps a straight line of points to a set of points
// // whose endpoints are in bounds, but others are not. There is probably some mathematical
// // way to detect this about the transformation that I don't know yet.
// // This results in an ugly runtime exception despite our clever checks above -- can't have
// // that. We could check each point's coordinates but that feels duplicative. We settle for
// // catching and wrapping ArrayIndexOutOfBoundsException.
// throw NotFoundException.getNotFoundInstance();
// }
}
return Ok(bits);
}
}
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import com.google.zxing.FormatException;
// import java.nio.charset.Charset;
// import java.util.HashMap;
// import java.util.Map;
/**
* Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1
* of ISO 18004.
*
* @author Sean Owen
*/
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum CharacterSetECI {
// Enum name is a Java encoding valid for java.lang and java.io
Cp437, //(new int[]{0,2}),
ISO8859_1, //(new int[]{1,3}, "ISO-8859-1"),
ISO8859_2, //(4, "ISO-8859-2"),
ISO8859_3, //(5, "ISO-8859-3"),
ISO8859_4, //(6, "ISO-8859-4"),
ISO8859_5, //(7, "ISO-8859-5"),
ISO8859_6, //(8, "ISO-8859-6"),
ISO8859_7, //(9, "ISO-8859-7"),
ISO8859_8, //(10, "ISO-8859-8"),
ISO8859_9, //(11, "ISO-8859-9"),
ISO8859_10, //(12, "ISO-8859-10"),
ISO8859_11, //(13, "ISO-8859-11"),
ISO8859_13, //(15, "ISO-8859-13"),
ISO8859_14, //(16, "ISO-8859-14"),
ISO8859_15, //(17, "ISO-8859-15"),
ISO8859_16, //(18, "ISO-8859-16"),
SJIS, //(20, "Shift_JIS"),
Cp1250, //(21, "windows-1250"),
Cp1251, //(22, "windows-1251"),
Cp1252, //(23, "windows-1252"),
Cp1256, //(24, "windows-1256"),
UnicodeBigUnmarked, //(25, "UTF-16BE", "UnicodeBig"),
UTF8, //(26, "UTF-8"),
ASCII, //(new int[] {27, 170}, "US-ASCII"),
Big5, //(28),
GB18030, //(29, "GB2312", "EUC_CN", "GBK"),
EUC_KR, //(30, "EUC-KR");
}
impl CharacterSetECI {
// private static final Map VALUE_TO_ECI = new HashMap<>();
// private static final Map NAME_TO_ECI = new HashMap<>();
// static {
// for (CharacterSetECI eci : values()) {
// for (int value : eci.values) {
// VALUE_TO_ECI.put(value, eci);
// }
// NAME_TO_ECI.put(eci.name(), eci);
// for (String name : eci.otherEncodingNames) {
// NAME_TO_ECI.put(name, eci);
// }
// }
// }
// private final int[] values;
// private final String[] otherEncodingNames;
// CharacterSetECI(int value) {
// this(new int[] {value});
// }
// CharacterSetECI(int value, String... otherEncodingNames) {
// this.values = new int[] {value};
// this.otherEncodingNames = otherEncodingNames;
// }
// CharacterSetECI(int[] values, String... otherEncodingNames) {
// this.values = values;
// this.otherEncodingNames = otherEncodingNames;
// }
pub fn getValueSelf(&self) -> u32 {
Self::getValue(self)
}
pub fn getValue(cs_eci: &CharacterSetECI) -> u32 {
match cs_eci {
CharacterSetECI::Cp437 => 0,
CharacterSetECI::ISO8859_1 => 1,
CharacterSetECI::ISO8859_2 => 4,
CharacterSetECI::ISO8859_3 => 5,
CharacterSetECI::ISO8859_4 => 6,
CharacterSetECI::ISO8859_5 => 7,
CharacterSetECI::ISO8859_6 => 8,
CharacterSetECI::ISO8859_7 => 9,
CharacterSetECI::ISO8859_8 => 10,
CharacterSetECI::ISO8859_9 => 11,
CharacterSetECI::ISO8859_10 => 12,
CharacterSetECI::ISO8859_11 => 13,
CharacterSetECI::ISO8859_13 => 15,
CharacterSetECI::ISO8859_14 => 16,
CharacterSetECI::ISO8859_15 => 17,
CharacterSetECI::ISO8859_16 => 18,
CharacterSetECI::SJIS => 20,
CharacterSetECI::Cp1250 => 21,
CharacterSetECI::Cp1251 => 22,
CharacterSetECI::Cp1252 => 23,
CharacterSetECI::Cp1256 => 24,
CharacterSetECI::UnicodeBigUnmarked => 25,
CharacterSetECI::UTF8 => 26,
CharacterSetECI::ASCII => 27,
CharacterSetECI::Big5 => 28,
CharacterSetECI::GB18030 => 29,
CharacterSetECI::EUC_KR => 30,
}
}
pub fn getCharset(cs_eci: &CharacterSetECI) -> EncodingRef {
let name = match cs_eci {
// CharacterSetECI::Cp437 => "CP437",
CharacterSetECI::Cp437 => "UTF-8",
CharacterSetECI::ISO8859_1 => "ISO-8859-1",
CharacterSetECI::ISO8859_2 => "ISO-8859-2",
CharacterSetECI::ISO8859_3 => "ISO-8859-3",
CharacterSetECI::ISO8859_4 => "ISO-8859-4",
CharacterSetECI::ISO8859_5 => "ISO-8859-5",
CharacterSetECI::ISO8859_6 => "ISO-8859-6",
CharacterSetECI::ISO8859_7 => "ISO-8859-7",
CharacterSetECI::ISO8859_8 => "ISO-8859-8",
CharacterSetECI::ISO8859_9 => "ISO-8859-9",
CharacterSetECI::ISO8859_10 => "ISO-8859-10",
CharacterSetECI::ISO8859_11 => "ISO-8859-11",
CharacterSetECI::ISO8859_13 => "ISO-8859-13",
CharacterSetECI::ISO8859_14 => "ISO-8859-14",
CharacterSetECI::ISO8859_15 => "ISO-8859-15",
CharacterSetECI::ISO8859_16 => "ISO-8859-16",
CharacterSetECI::SJIS => "Shift_JIS",
CharacterSetECI::Cp1250 => "windows-1250",
CharacterSetECI::Cp1251 => "windows-1251",
CharacterSetECI::Cp1252 => "windows-1252",
CharacterSetECI::Cp1256 => "windows-1256",
CharacterSetECI::UnicodeBigUnmarked => "UTF-16BE",
CharacterSetECI::UTF8 => "UTF-8",
CharacterSetECI::ASCII => "US-ASCII",
CharacterSetECI::Big5 => "Big5",
CharacterSetECI::GB18030 => "GB2312",
CharacterSetECI::EUC_KR => "EUC-KR",
};
encoding::label::encoding_from_whatwg_label(name).unwrap()
}
/**
* @param charset Java character set object
* @return CharacterSetECI representing ECI for character encoding, or null if it is legal
* but unsupported
*/
pub fn getCharacterSetECI(charset: &'static dyn Encoding) -> Option {
let name = if let Some(nm) = charset.whatwg_name() {
nm
} else {
charset.name()
};
match name {
"CP437" => Some(CharacterSetECI::Cp437),
"iso-8859-1" => Some(CharacterSetECI::ISO8859_1),
"iso-8859-2" => Some(CharacterSetECI::ISO8859_2),
"iso-8859-3" => Some(CharacterSetECI::ISO8859_3),
"iso-8859-4" => Some(CharacterSetECI::ISO8859_4),
"iso-8859-5" => Some(CharacterSetECI::ISO8859_5),
"iso-8859-6" => Some(CharacterSetECI::ISO8859_6),
"iso-8859-7" => Some(CharacterSetECI::ISO8859_7),
"iso-8859-8" => Some(CharacterSetECI::ISO8859_8),
"iso-8859-9" => Some(CharacterSetECI::ISO8859_9),
"iso-8859-10" => Some(CharacterSetECI::ISO8859_10),
"iso-8859-11" => Some(CharacterSetECI::ISO8859_11),
"iso-8859-13" => Some(CharacterSetECI::ISO8859_13),
"iso-8859-14" => Some(CharacterSetECI::ISO8859_14),
"iso-8859-15" => Some(CharacterSetECI::ISO8859_15),
"iso-8859-16" => Some(CharacterSetECI::ISO8859_16),
"shift_jis" => Some(CharacterSetECI::SJIS),
"windows-1250" => Some(CharacterSetECI::Cp1250),
"windows-1251" => Some(CharacterSetECI::Cp1251),
"windows-1252" => Some(CharacterSetECI::Cp1252),
"windows-1256" => Some(CharacterSetECI::Cp1256),
"utf-16be" => Some(CharacterSetECI::UnicodeBigUnmarked),
"utf-8" => Some(CharacterSetECI::UTF8),
"us-ascii" => Some(CharacterSetECI::ASCII),
"big5" => Some(CharacterSetECI::Big5),
"gb2312" => Some(CharacterSetECI::GB18030),
"euc-kr" => Some(CharacterSetECI::EUC_KR),
_ => None,
}
}
/**
* @param value character set ECI value
* @return {@code CharacterSetECI} representing ECI of given value, or null if it is legal but
* unsupported
* @throws FormatException if ECI value is invalid
*/
pub fn getCharacterSetECIByValue(value: u32) -> Result {
match value {
0 | 2 => Ok(CharacterSetECI::Cp437),
1 | 3 => Ok(CharacterSetECI::ISO8859_1),
4 => Ok(CharacterSetECI::ISO8859_2),
5 => Ok(CharacterSetECI::ISO8859_3),
6 => Ok(CharacterSetECI::ISO8859_4),
7 => Ok(CharacterSetECI::ISO8859_5),
8 => Ok(CharacterSetECI::ISO8859_6),
9 => Ok(CharacterSetECI::ISO8859_7),
10 => Ok(CharacterSetECI::ISO8859_8),
11 => Ok(CharacterSetECI::ISO8859_9),
12 => Ok(CharacterSetECI::ISO8859_10),
13 => Ok(CharacterSetECI::ISO8859_11),
15 => Ok(CharacterSetECI::ISO8859_13),
16 => Ok(CharacterSetECI::ISO8859_14),
17 => Ok(CharacterSetECI::ISO8859_15),
18 => Ok(CharacterSetECI::ISO8859_16),
20 => Ok(CharacterSetECI::SJIS),
21 => Ok(CharacterSetECI::Cp1250),
22 => Ok(CharacterSetECI::Cp1251),
23 => Ok(CharacterSetECI::Cp1252),
24 => Ok(CharacterSetECI::Cp1256),
25 => Ok(CharacterSetECI::UnicodeBigUnmarked),
26 => Ok(CharacterSetECI::UTF8),
27 | 170 => Ok(CharacterSetECI::ASCII),
28 => Ok(CharacterSetECI::Big5),
29 => Ok(CharacterSetECI::GB18030),
30 => Ok(CharacterSetECI::EUC_KR),
_ => Err(Exceptions::NotFoundException("Bad ECI Value".to_owned())),
}
}
/**
* @param name character set ECI encoding name
* @return CharacterSetECI representing ECI for character encoding, or null if it is legal
* but unsupported
*/
pub fn getCharacterSetECIByName(name: &str) -> Option {
match name {
"CP437" => Some(CharacterSetECI::Cp437),
"ISO-8859-1" => Some(CharacterSetECI::ISO8859_1),
"ISO-8859-2" => Some(CharacterSetECI::ISO8859_2),
"ISO-8859-3" => Some(CharacterSetECI::ISO8859_3),
"ISO-8859-4" => Some(CharacterSetECI::ISO8859_4),
"ISO-8859-5" => Some(CharacterSetECI::ISO8859_5),
"ISO-8859-6" => Some(CharacterSetECI::ISO8859_6),
"ISO-8859-7" => Some(CharacterSetECI::ISO8859_7),
"ISO-8859-8" => Some(CharacterSetECI::ISO8859_8),
"ISO-8859-9" => Some(CharacterSetECI::ISO8859_9),
"ISO-8859-10" => Some(CharacterSetECI::ISO8859_10),
"ISO-8859-11" => Some(CharacterSetECI::ISO8859_11),
"ISO-8859-13" => Some(CharacterSetECI::ISO8859_13),
"ISO-8859-14" => Some(CharacterSetECI::ISO8859_14),
"ISO-8859-15" => Some(CharacterSetECI::ISO8859_15),
"ISO-8859-16" => Some(CharacterSetECI::ISO8859_16),
"Shift_JIS" => Some(CharacterSetECI::SJIS),
"windows-1250" => Some(CharacterSetECI::Cp1250),
"windows-1251" => Some(CharacterSetECI::Cp1251),
"windows-1252" => Some(CharacterSetECI::Cp1252),
"windows-1256" => Some(CharacterSetECI::Cp1256),
"UTF-16BE" => Some(CharacterSetECI::UnicodeBigUnmarked),
"UTF-8" => Some(CharacterSetECI::UTF8),
"US-ASCII" => Some(CharacterSetECI::ASCII),
"Big5" => Some(CharacterSetECI::Big5),
"GB2312" => Some(CharacterSetECI::GB18030),
"EUC-KR" => Some(CharacterSetECI::EUC_KR),
_ => None,
}
}
}
/*
* Copyright 2022 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import com.google.zxing.FormatException;
// import java.nio.charset.Charset;
// import java.nio.charset.StandardCharsets;
/**
* Class that converts a sequence of ECIs and bytes into a string
*
* @author Alex Geller
*/
pub struct ECIStringBuilder {
current_bytes: Vec,
result: String,
current_charset: &'static dyn Encoding, //= StandardCharsets.ISO_8859_1;
}
impl ECIStringBuilder {
pub fn new() -> Self {
Self {
current_bytes: Vec::new(),
result: String::new(),
current_charset: encoding::all::UTF_8,
}
}
pub fn with_capacity(initial_capacity: usize) -> Self {
Self {
current_bytes: Vec::with_capacity(initial_capacity),
result: String::new(),
current_charset: encoding::all::ISO_8859_1,
}
}
/**
* Appends {@code value} as a byte value
*
* @param value character whose lowest byte is to be appended
*/
pub fn append_char(&mut self, value: char) {
self.current_bytes.push(value as u8);
}
/**
* Appends {@code value} as a byte value
*
* @param value byte to append
*/
pub fn append_byte(&mut self, value: u8) {
self.current_bytes.push(value);
}
/**
* Appends the characters in {@code value} as bytes values
*
* @param value string to append
*/
pub fn append_string(&mut self, value: &str) {
value.as_bytes().iter().map(|b| self.current_bytes.push(*b));
// self.current_bytes.push(value.as_bytes());
}
/**
* Append the string repesentation of {@code value} (short for {@code append(String.valueOf(value))})
*
* @param value int to append as a string
*/
pub fn append(&mut self, value: i32) {
self.append_string(&format!("{}", value));
}
/**
* Appends ECI value to output.
*
* @param value ECI value to append, as an int
* @throws FormatException on invalid ECI value
*/
pub fn appendECI(&mut self, value: u32) -> Result<(), Exceptions> {
self.encodeCurrentBytesIfAny();
let character_set_eci = CharacterSetECI::getCharacterSetECIByValue(value)?;
// if (character_set_eci == null) {
// throw FormatException.getFormatInstance();
// }
self.current_charset = CharacterSetECI::getCharset(&character_set_eci);
Ok(())
}
pub fn encodeCurrentBytesIfAny(&mut self) {
if self.current_charset.name() == encoding::all::UTF_8.name() {
if !self.current_bytes.is_empty() {
// if result == null {
// result = currentBytes;
// currentBytes = new StringBuilder();
// } else {
self.result
.push_str(&String::from_utf8(self.current_bytes.clone()).unwrap());
self.current_bytes.clear();
// }
}
} else if !self.current_bytes.is_empty() {
let bytes = self.current_bytes.clone();
self.current_bytes.clear();
// if (result == null) {
// result = new StringBuilder(new String(bytes, currentCharset));
// } else {
let encoded_value = self
.current_charset
.decode(&bytes, encoding::DecoderTrap::Replace)
.unwrap();
self.result.push_str(&encoded_value);
// }
}
}
/**
* Appends the characters from {@code value} (unlike all other append methods of this class who append bytes)
*
* @param value characters to append
*/
pub fn appendCharacters(&mut self, value: &str) {
self.encodeCurrentBytesIfAny();
self.result.push_str(value);
}
/**
* Short for {@code toString().length()} (if possible, use {@link #isEmpty()} instead)
*
* @return length of string representation in characters
*/
pub fn len(&mut self) -> usize {
self.encodeCurrentBytesIfAny(); //return toString().length();
self.result.len()
}
/**
* @return true iff nothing has been appended
*/
pub fn is_empty(&self) -> bool {
return self.current_bytes.is_empty() && self.result.is_empty();
}
}
impl fmt::Display for ECIStringBuilder {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
//self.encodeCurrentBytesIfAny();
write!(f, "{}", self.result)
}
}
/*
* Copyright 2021 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import java.nio.charset.Charset;
// import java.nio.charset.CharsetEncoder;
// import java.nio.charset.StandardCharsets;
// import java.nio.charset.UnsupportedCharsetException;
// import java.util.ArrayList;
// import java.util.List;
lazy_static! {
static ref ENCODERS : Vec = {
let mut enc_vec = Vec::new();
for name in NAMES {
if let Some(enc) = CharacterSetECI::getCharacterSetECIByName(name) {
// try {
enc_vec.push(CharacterSetECI::getCharset(&enc));
// } catch (UnsupportedCharsetException e) {
// continue
// }
}
}
enc_vec
};
}
const NAMES: [&str; 20] = [
"IBM437",
"ISO-8859-2",
"ISO-8859-3",
"ISO-8859-4",
"ISO-8859-5",
"ISO-8859-6",
"ISO-8859-7",
"ISO-8859-8",
"ISO-8859-9",
"ISO-8859-10",
"ISO-8859-11",
"ISO-8859-13",
"ISO-8859-14",
"ISO-8859-15",
"ISO-8859-16",
"windows-1250",
"windows-1251",
"windows-1252",
"windows-1256",
"Shift_JIS",
];
/**
* Set of CharsetEncoders for a given input string
*
* Invariants:
* - The list contains only encoders from CharacterSetECI (list is shorter then the list of encoders available on
* the platform for which ECI values are defined).
* - The list contains encoders at least one encoder for every character in the input.
* - The first encoder in the list is always the ISO-8859-1 encoder even of no character in the input can be encoded
* by it.
* - If the input contains a character that is not in ISO-8859-1 then the last two entries in the list will be the
* UTF-8 encoder and the UTF-16BE encoder.
*
* @author Alex Geller
*/
#[derive(Clone)]
pub struct ECIEncoderSet {
encoders: Vec,
priorityEncoderIndex: Option,
}
impl ECIEncoderSet {
/**
* Constructs an encoder set
*
* @param stringToEncode the string that needs to be encoded
* @param priorityCharset The preferred {@link Charset} or null.
* @param fnc1 fnc1 denotes the character in the input that represents the FNC1 character or -1 for a non-GS1 bar
* code. When specified, it is considered an error to pass it as argument to the methods canEncode() or encode().
*/
pub fn new(
stringToEncodeMain: &str,
priorityCharset: Option,
fnc1: Option<&str>,
) -> Self {
// List of encoders that potentially encode characters not in ISO-8859-1 in one byte.
let mut encoders: Vec;
let mut priorityEncoderIndexValue = None;
let mut neededEncoders: Vec = Vec::new();
let stringToEncode = stringToEncodeMain.graphemes(true).collect::>();
//we always need the ISO-8859-1 encoder. It is the default encoding
neededEncoders.push(encoding::all::ISO_8859_1);
let mut needUnicodeEncoder = if let Some(pc) = priorityCharset {
pc.name().starts_with("UTF")
} else {
false
};
//Walk over the input string and see if all characters can be encoded with the list of encoders
for i in 0..stringToEncode.len() {
// for (int i = 0; i < stringToEncode.length(); i++) {
let mut canEncode = false;
for encoder in &neededEncoders {
// for (CharsetEncoder encoder : neededEncoders) {
let c = stringToEncode.get(i).unwrap();
if (fnc1.is_some() && c == fnc1.as_ref().unwrap())
|| encoder.encode(c, encoding::EncoderTrap::Strict).is_ok()
{
canEncode = true;
break;
}
}
if !canEncode {
//for the character at position i we don't yet have an encoder in the list
for i_encoder in 0..ENCODERS.len() {
// for encoder in ENCODERS {
let encoder = ENCODERS.get(i_encoder).unwrap();
// for (CharsetEncoder encoder : ENCODERS) {
if encoder
.encode(
&stringToEncode.get(i).unwrap(),
encoding::EncoderTrap::Strict,
)
.is_ok()
{
//Good, we found an encoder that can encode the character. We add him to the list and continue scanning
//the input
neededEncoders.push(*encoder);
canEncode = true;
break;
}
}
}
if !canEncode {
//The character is not encodeable by any of the single byte encoders so we remember that we will need a
//Unicode encoder.
needUnicodeEncoder = true;
}
}
if neededEncoders.len() == 1 && !needUnicodeEncoder {
//the entire input can be encoded by the ISO-8859-1 encoder
encoders = vec![encoding::all::ISO_8859_1];
} else {
// we need more than one single byte encoder or we need a Unicode encoder.
// In this case we append a UTF-8 and UTF-16 encoder to the list
// encoders = [] new CharsetEncoder[neededEncoders.size() + 2];
encoders = Vec::new();
let index = 0;
for encoder in neededEncoders {
// for (CharsetEncoder encoder : neededEncoders) {
//encoders[index++] = encoder;
encoders.push(encoder);
}
encoders.push(encoding::all::UTF_8);
encoders.push(encoding::all::UTF_16BE);
}
//Compute priorityEncoderIndex by looking up priorityCharset in encoders
// if priorityCharset != null {
if priorityCharset.is_some() {
for i in 0..encoders.len() {
// for (int i = 0; i < encoders.length; i++) {
if priorityCharset.as_ref().unwrap().name() == encoders[i].name() {
priorityEncoderIndexValue = Some(i);
break;
}
}
}
// }
//invariants
assert_eq!(encoders[0].name(), encoding::all::ISO_8859_1.name());
Self {
encoders: encoders,
priorityEncoderIndex: priorityEncoderIndexValue,
}
}
pub fn len(&self) -> usize {
return self.encoders.len();
}
pub fn getCharsetName(&self, index: usize) -> &'static str {
assert!(index < self.len());
return self.encoders[index].name();
}
pub fn getCharset(&self, index: usize) -> EncodingRef {
assert!(index < self.len());
return self.encoders[index];
}
pub fn getECIValue(&self, encoderIndex: usize) -> u32 {
CharacterSetECI::getValue(
&CharacterSetECI::getCharacterSetECI(self.encoders[encoderIndex]).unwrap(),
)
}
/*
* returns -1 if no priority charset was defined
*/
pub fn getPriorityEncoderIndex(&self) -> Option {
self.priorityEncoderIndex
}
pub fn canEncode(&self, c: &str, encoderIndex: usize) -> bool {
assert!(encoderIndex < self.len());
let encoder = self.encoders[encoderIndex];
let enc_data = encoder.encode(c, encoding::EncoderTrap::Strict);
enc_data.is_ok()
}
pub fn encode_char(&self, c: &str, encoderIndex: usize) -> Vec {
assert!(encoderIndex < self.len());
let encoder = self.encoders[encoderIndex];
let enc_data = encoder.encode(&c.to_string(), encoding::EncoderTrap::Strict);
assert!(enc_data.is_ok());
return enc_data.unwrap();
}
pub fn encode_string(&self, s: &str, encoderIndex: usize) -> Vec {
assert!(encoderIndex < self.len());
let encoder = self.encoders[encoderIndex];
encoder.encode(s, encoding::EncoderTrap::Replace).unwrap()
}
}
/*
* Copyright 2021 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import java.nio.charset.Charset;
// import java.util.ArrayList;
// import java.util.List;
//* approximated (latch + 2 codewords)
static COST_PER_ECI: usize = 3;
/**
* Class that converts a character string into a sequence of ECIs and bytes
*
* The implementation uses the Dijkstra algorithm to produce minimal encodings
*
* @author Alex Geller
*/
pub struct MinimalECIInput {
bytes: Vec,
fnc1: u16,
}
impl ECIInput for MinimalECIInput {
/**
* Returns the length of this input. The length is the number
* of {@code byte}s, FNC1 characters or ECIs in the sequence.
*
* @return the number of {@code char}s in this sequence
*/
fn length(&self) -> usize {
return self.bytes.len();
}
/**
* Returns the {@code byte} value at the specified index. An index ranges from zero
* to {@code length() - 1}. The first {@code byte} value of the sequence is at
* index zero, the next at index one, and so on, as for array
* indexing.
*
* @param index the index of the {@code byte} value to be returned
*
* @return the specified {@code byte} value as character or the FNC1 character
*
* @throws IndexOutOfBoundsException
* if the {@code index} argument is negative or not less than
* {@code length()}
* @throws IllegalArgumentException
* if the value at the {@code index} argument is an ECI (@see #isECI)
*/
fn charAt(&self, index: usize) -> Result {
if (index < 0 || index >= self.length()) {
return Err(Exceptions::IndexOutOfBoundsException(index.to_string()));
}
if (self.isECI(index as u32)?) {
return Err(Exceptions::IllegalArgumentException(format!(
"value at {} is not a character but an ECI",
index
)));
}
if self.isFNC1(index)? {
Ok(self.fnc1 as u8 as char)
} else {
Ok(self.bytes[index] as u8 as char)
}
}
/**
* Returns a {@code CharSequence} that is a subsequence of this sequence.
* The subsequence starts with the {@code char} value at the specified index and
* ends with the {@code char} value at index {@code end - 1}. The length
* (in {@code char}s) of the
* returned sequence is {@code end - start}, so if {@code start == end}
* then an empty sequence is returned.
*
* @param start the start index, inclusive
* @param end the end index, exclusive
*
* @return the specified subsequence
*
* @throws IndexOutOfBoundsException
* if {@code start} or {@code end} are negative,
* if {@code end} is greater than {@code length()},
* or if {@code start} is greater than {@code end}
* @throws IllegalArgumentException
* if a value in the range {@code start}-{@code end} is an ECI (@see #isECI)
*/
fn subSequence(&self, start: usize, end: usize) -> Result, Exceptions> {
if start < 0 || start > end || end > self.length() {
return Err(Exceptions::IndexOutOfBoundsException(start.to_string()));
}
let mut result = String::new();
for i in start..end {
// for (int i = start; i < end; i++) {
if self.isECI(i as u32)? {
return Err(Exceptions::IllegalArgumentException(format!(
"value at {} is not a character but an ECI",
i
)));
}
result.push_str(&self.charAt(i)?.to_string());
}
Ok(result.chars().collect())
}
/**
* Determines if a value is an ECI
*
* @param index the index of the value
*
* @return true if the value at position {@code index} is an ECI
*
* @throws IndexOutOfBoundsException
* if the {@code index} argument is negative or not less than
* {@code length()}
*/
fn isECI(&self, index: u32) -> Result {
if index < 0 || index >= self.length() as u32 {
return Err(Exceptions::IndexOutOfBoundsException(index.to_string()));
}
Ok(self.bytes[index as usize] > 255 && self.bytes[index as usize] <= u16::MAX)
}
/**
* Returns the {@code int} ECI value at the specified index. An index ranges from zero
* to {@code length() - 1}. The first {@code byte} value of the sequence is at
* index zero, the next at index one, and so on, as for array
* indexing.
*
* @param index the index of the {@code int} value to be returned
*
* @return the specified {@code int} ECI value.
* The ECI specified the encoding of all bytes with a higher index until the
* next ECI or until the end of the input if no other ECI follows.
*
* @throws IndexOutOfBoundsException
* if the {@code index} argument is negative or not less than
* {@code length()}
* @throws IllegalArgumentException
* if the value at the {@code index} argument is not an ECI (@see #isECI)
*/
fn getECIValue(&self, index: usize) -> Result {
if index < 0 || index >= self.length() {
return Err(Exceptions::IndexOutOfBoundsException(index.to_string()));
}
if !self.isECI(index as u32)? {
return Err(Exceptions::IllegalArgumentException(format!(
"value at {} is not an ECI but a character",
index
)));
}
Ok((self.bytes[index] as u32 - 256) as u32)
}
fn haveNCharacters(&self, index: usize, n: usize) -> bool {
if index + n - 1 >= self.bytes.len() {
return false;
}
for i in 0..n {
// for (int i = 0; i < n; i++) {
if self.isECI(index as u32 + i as u32).unwrap() {
return false;
}
}
return true;
}
}
impl MinimalECIInput {
/**
* Constructs a minimal input
*
* @param stringToEncode the character string to encode
* @param priorityCharset The preferred {@link Charset}. When the value of the argument is null, the algorithm
* chooses charsets that leads to a minimal representation. Otherwise the algorithm will use the priority
* charset to encode any character in the input that can be encoded by it if the charset is among the
* supported charsets.
* @param fnc1 denotes the character in the input that represents the FNC1 character or -1 if this is not GS1
* input.
*/
pub fn new(
stringToEncodeInput: &str,
priorityCharset: Option,
fnc1: Option<&str>,
) -> Self {
let stringToEncode = stringToEncodeInput.graphemes(true).collect::>();
let encoderSet = ECIEncoderSet::new(stringToEncodeInput, priorityCharset, fnc1);
let bytes = if encoderSet.len() == 1 {
//optimization for the case when all can be encoded without ECI in ISO-8859-1
let mut bytes_hld = vec![0; stringToEncode.len()];
for i in 0..stringToEncode.len() {
// for (int i = 0; i < bytes.length; i++) {
let c = stringToEncode.get(i).unwrap();
bytes_hld[i] = if fnc1.is_some() && c == fnc1.as_ref().unwrap() {
1000
} else {
c.chars().nth(0).unwrap() as u16
};
}
bytes_hld
} else {
Self::encodeMinimally(
stringToEncodeInput,
&encoderSet,
fnc1.as_ref().unwrap().chars().nth(0).unwrap() as u16,
)
};
Self {
bytes: bytes,
fnc1: fnc1.as_ref().unwrap().chars().nth(0).unwrap() as u16,
}
}
pub fn getFNC1Character(&self) -> u16 {
self.fnc1
}
/**
* Determines if a value is the FNC1 character
*
* @param index the index of the value
*
* @return true if the value at position {@code index} is the FNC1 character
*
* @throws IndexOutOfBoundsException
* if the {@code index} argument is negative or not less than
* {@code length()}
*/
pub fn isFNC1(&self, index: usize) -> Result {
if index < 0 || index >= self.length() {
return Err(Exceptions::IndexOutOfBoundsException(index.to_string()));
}
Ok(self.bytes[index] == 1000)
}
fn addEdge(edges: &mut Vec>>>, to: usize, edge: Rc) {
if edges[to][edge.encoderIndex].is_none()
|| edges[to][edge.encoderIndex]
.clone()
.unwrap()
.cachedTotalSize
> edge.cachedTotalSize
{
edges[to][edge.encoderIndex] = Some(edge.clone());
}
}
fn addEdges(
stringToEncode: &str,
encoderSet: &ECIEncoderSet,
edges: &mut Vec>>>,
from: usize,
previous: Option>,
fnc1: u16,
) {
// let ch = stringToEncode.chars().nth(from).unwrap() as i16;
let ch = stringToEncode.graphemes(true).nth(from).unwrap();
let mut start = 0;
let mut end = encoderSet.len();
if encoderSet.getPriorityEncoderIndex().is_some()
&& (ch.chars().nth(0).unwrap() as u16 == fnc1
|| encoderSet.canEncode(ch, encoderSet.getPriorityEncoderIndex().unwrap()))
{
start = encoderSet.getPriorityEncoderIndex().unwrap();
end = start + 1;
}
for i in start..end {
// for (int i = start; i < end; i++) {
if ch.chars().nth(0).unwrap() as u16 == fnc1 || encoderSet.canEncode(ch, i) {
Self::addEdge(
edges,
from + 1,
Rc::new(InputEdge::new(ch, encoderSet, i, previous.clone(), fnc1)),
);
}
}
}
pub fn encodeMinimally(
stringToEncode: &str,
encoderSet: &ECIEncoderSet,
fnc1: u16,
) -> Vec {
let inputLength = stringToEncode.len();
// Array that represents vertices. There is a vertex for every character and encoding.
let mut edges = vec![vec![None; encoderSet.len()]; inputLength + 1]; //InputEdge[inputLength + 1][encoderSet.length()];
Self::addEdges(stringToEncode, encoderSet, &mut edges, 0, None, fnc1);
for i in 0..=inputLength {
// for (int i = 1; i <= inputLength; i++) {
for j in 0..encoderSet.len() {
// for (int j = 0; j < encoderSet.length(); j++) {
if edges[i][j].is_some() && i < inputLength {
let edg = edges[i][j].clone();
Self::addEdges(stringToEncode, encoderSet, &mut edges, i, edg, fnc1);
}
}
//optimize memory by removing edges that have been passed.
for j in 0..encoderSet.len() {
// for (int j = 0; j < encoderSet.length(); j++) {
edges[i - 1][j] = None;
}
}
let mut minimalJ: i32 = -1;
let mut minimalSize: i32 = i32::MAX;
for j in 0..encoderSet.len() {
// for (int j = 0; j < encoderSet.length(); j++) {
if edges[inputLength][j].is_some() {
let edge = edges[inputLength][j].clone().unwrap();
if (edge.cachedTotalSize as i32) < minimalSize {
minimalSize = edge.cachedTotalSize as i32;
minimalJ = j as i32;
}
}
}
if minimalJ < 0 {
panic!("Internal error: failed to encode \"{}\"", stringToEncode);
}
let mut intsAL: Vec = Vec::new();
let mut current = edges[inputLength][minimalJ as usize].clone();
while current.is_some() {
let c = current.unwrap().clone();
if c.isFNC1() {
intsAL.splice(0..0, [1000]);
} else {
let bytes: Vec = encoderSet
.encode_char(&c.c, c.encoderIndex)
.iter()
.map(|x| *x as u16)
.collect();
let mut i = bytes.len() as i32 - 1;
while i >= 0 {
// for (int i = bytes.length - 1; i >= 0; i--) {
intsAL.splice(0..0, [bytes[i as usize]]);
i = -1;
}
}
let previousEncoderIndex = if c.previous.is_none() {
0
} else {
c.previous.clone().unwrap().encoderIndex
};
if previousEncoderIndex != c.encoderIndex {
intsAL.splice(
0..0,
[256 as u16 + encoderSet.getECIValue(c.encoderIndex) as u16],
);
}
current = c.previous.clone();
}
let mut ints = vec![0; intsAL.len()];
for i in 0..ints.len() {
// for (int i = 0; i < ints.length; i++) {
ints[i] = *intsAL.get(i).unwrap() as u16;
}
return ints;
}
}
struct InputEdge {
c: String,
encoderIndex: usize, //the encoding of this edge
previous: Option>,
cachedTotalSize: usize,
}
impl InputEdge {
pub fn new(
c: &str,
encoderSet: &ECIEncoderSet,
encoderIndex: usize,
previous: Option>,
fnc1: u16,
) -> Self {
let mut size = if c == "\u{1000}" {
1
} else {
encoderSet.encode_char(c, encoderIndex).len()
};
let fnc1Str = String::from_utf16(&[fnc1]).unwrap();
if let Some(prev) = previous {
let previousEncoderIndex = prev.encoderIndex;
if previousEncoderIndex != encoderIndex {
size += COST_PER_ECI;
}
size += prev.cachedTotalSize;
Self {
c: if c == fnc1Str {
String::from("\u{1000}")
} else {
String::from(c)
},
encoderIndex,
previous: Some(prev.clone()),
cachedTotalSize: size,
}
} else {
let previousEncoderIndex = 0;
if previousEncoderIndex != encoderIndex {
size += COST_PER_ECI;
}
Self {
c: if c == fnc1Str {
String::from("\u{1000}")
} else {
String::from(c)
},
encoderIndex,
previous: None,
cachedTotalSize: size,
}
}
// int size = this.c == 1000 ? 1 : encoderSet.encode(c, encoderIndex).length;
// let previousEncoderIndex = if previous.is_none() {
// 0
// } else {
// previous.unwrap().encoderIndex
// };
// int previousEncoderIndex = previous == null ? 0 : previous.encoderIndex;
// if previousEncoderIndex != encoderIndex {
// size += COST_PER_ECI;
// }
// if prev_is_some {
// size += previous.unwrap().cachedTotalSize;
// }
// Self {
// c: if c == fnc1 { 1000 as char } else { c },
// encoderIndex,
// previous: previous,
// cachedTotalSize: size,
// }
// this.c = c == fnc1 ? 1000 : c;
// this.encoderIndex = encoderIndex;
// this.previous = previous;
// this.cachedTotalSize = size;
}
pub fn isFNC1(&self) -> bool {
self.c == "\u{1000}"
}
}
impl fmt::Display for MinimalECIInput {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut result = String::new();
for i in 0..self.length() {
// for (int i = 0; i < length(); i++) {
if i > 0 {
result.push_str(", ");
}
if self.isECI(i as u32).unwrap() {
result.push_str("ECI(");
result.push_str(&self.getECIValue(i).unwrap().to_string());
result.push(')');
} else if (self.charAt(i).unwrap() as u8) < 128 {
result.push('\'');
result.push(self.charAt(i).unwrap());
result.push('\'');
} else {
result.push(self.charAt(i).unwrap());
}
}
write!(f, "{}", result)
}
}
/*
* Copyright 2009 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import com.google.zxing.Binarizer;
// import com.google.zxing.LuminanceSource;
// import com.google.zxing.NotFoundException;
/**
* This Binarizer implementation uses the old ZXing global histogram approach. It is suitable
* for low-end mobile devices which don't have enough CPU or memory to use a local thresholding
* algorithm. However, because it picks a global black point, it cannot handle difficult shadows
* and gradients.
*
* Faster mobile devices and all desktop applications should probably use HybridBinarizer instead.
*
* @author dswitkin@google.com (Daniel Switkin)
* @author Sean Owen
*/
pub struct GlobalHistogramBinarizer {
luminances: Vec,
buckets: Vec,
width: usize,
height: usize,
source: Box,
}
impl Binarizer for GlobalHistogramBinarizer {
fn getLuminanceSource(&self) -> &Box {
&self.source
}
// Applies simple sharpening to the row data to improve performance of the 1D Readers.
fn getBlackRow(&self, y: usize, row: &mut BitArray) -> Result {
let source = self.getLuminanceSource();
let width = source.getWidth();
let mut row = if row.getSize() < width {
BitArray::with_size(width)
} else {
let mut z = row.clone();
z.clear();
z
};
// self.initArrays(width);
let localLuminances = source.getRow(y, &self.luminances);
let mut localBuckets = self.buckets.clone();
for x in 0..width {
// for (int x = 0; x < width; x++) {
localBuckets
[((localLuminances[x]) >> GlobalHistogramBinarizer::LUMINANCE_SHIFT) as usize] += 1;
}
let blackPoint = self.estimateBlackPoint(&localBuckets)?;
if width < 3 {
// Special case for very small images
for x in 0..width {
// for (int x = 0; x < width; x++) {
if (localLuminances[x] as u32) < blackPoint {
row.set(x);
}
}
} else {
let mut left = localLuminances[0]; // & 0xff;
let mut center = localLuminances[1]; // & 0xff;
for x in 1..width - 1 {
// for (int x = 1; x < width - 1; x++) {
let right = localLuminances[x + 1] & 0xff;
// A simple -1 4 -1 box filter with a weight of 2.
if ((center * 4) - left - right) as u32 / 2 < blackPoint {
row.set(x);
}
left = center;
center = right;
}
}
Ok(row)
}
// Does not sharpen the data, as this call is intended to only be used by 2D Readers.
fn getBlackMatrix(&self) -> Result {
let source = self.getLuminanceSource();
let width = source.getWidth();
let height = source.getHeight();
let mut matrix = BitMatrix::new(width as u32, height as u32)?;
// Quickly calculates the histogram by sampling four rows from the image. This proved to be
// more robust on the blackbox tests than sampling a diagonal as we used to do.
// self.initArrays(width);
let mut localBuckets = self.buckets.clone();
for y in 1..5 {
// for (int y = 1; y < 5; y++) {
let row = height * y / 5;
let localLuminances = source.getRow(row, &self.luminances);
let right = (width * 4) / 5;
let mut x = width / 5;
while x < right {
// for (int x = width / 5; x < right; x++) {
let pixel = localLuminances[x];
localBuckets[(pixel >> GlobalHistogramBinarizer::LUMINANCE_SHIFT) as usize] += 1;
x += 1;
}
}
let blackPoint = self.estimateBlackPoint(&localBuckets)?;
// We delay reading the entire image luminance until the black point estimation succeeds.
// Although we end up reading four rows twice, it is consistent with our motto of
// "fail quickly" which is necessary for continuous scanning.
let localLuminances = source.getMatrix();
for y in 0..height {
// for (int y = 0; y < height; y++) {
let offset = y * width;
for x in 0..width {
// for (int x = 0; x < width; x++) {
let pixel = localLuminances[offset + x] & 0xff;
if (pixel as u32) < blackPoint {
matrix.set(x as u32, y as u32);
}
}
}
Ok(matrix)
}
fn createBinarizer(&self, source: Box) -> Box {
return Box::new(GlobalHistogramBinarizer::new(source));
}
fn getWidth(&self) -> usize {
self.width
}
fn getHeight(&self) -> usize {
self.height
}
}
impl GlobalHistogramBinarizer {
const LUMINANCE_BITS: usize = 5;
const LUMINANCE_SHIFT: usize = 8 - GlobalHistogramBinarizer::LUMINANCE_BITS;
const LUMINANCE_BUCKETS: usize = 1 << GlobalHistogramBinarizer::LUMINANCE_BITS;
const EMPTY: [u8; 0] = [0; 0];
pub fn new(source: Box) -> Self {
Self {
luminances: vec![0; source.getWidth()],
buckets: vec![0; GlobalHistogramBinarizer::LUMINANCE_BUCKETS],
width: source.getWidth(),
height: source.getHeight(),
source: source,
}
}
// fn initArrays(&mut self, luminanceSize: usize) {
// // if self.luminances.len() < luminanceSize {
// // self.luminances = ;
// // }
// // // for x in 0..GlobalHistogramBinarizer::LUMINANCE_BUCKETS {
// // // for (int x = 0; x < LUMINANCE_BUCKETS; x++) {
// // self.buckets[x] = 0;
// // }
// }
fn estimateBlackPoint(&self, buckets: &[u32]) -> Result {
// Find the tallest peak in the histogram.
let numBuckets = buckets.len();
let mut maxBucketCount = 0;
let mut firstPeak = 0;
let mut firstPeakSize = 0;
for x in 0..numBuckets {
// for (int x = 0; x < numBuckets; x++) {
if buckets[x] > firstPeakSize {
firstPeak = x;
firstPeakSize = buckets[x];
}
if buckets[x] > maxBucketCount {
maxBucketCount = buckets[x];
}
}
// Find the second-tallest peak which is somewhat far from the tallest peak.
let mut secondPeak = 0;
let mut secondPeakScore = 0;
for x in 0..numBuckets {
// for (int x = 0; x < numBuckets; x++) {
let distanceToBiggest = x - firstPeak;
// Encourage more distant second peaks by multiplying by square of distance.
let score = buckets[x] * distanceToBiggest as u32 * distanceToBiggest as u32;
if score > secondPeakScore {
secondPeak = x;
secondPeakScore = score;
}
}
// Make sure firstPeak corresponds to the black peak.
if firstPeak > secondPeak {
let temp = firstPeak;
firstPeak = secondPeak;
secondPeak = temp;
}
// If there is too little contrast in the image to pick a meaningful black point, throw rather
// than waste time trying to decode the image, and risk false positives.
if secondPeak - firstPeak <= numBuckets / 16 {
return Err(Exceptions::NotFoundException(
"secondPeak - firstPeak <= numBuckets / 16 ".to_owned(),
));
}
// Find a valley between them that is low and closer to the white peak.
let mut bestValley = secondPeak - 1;
let mut bestValleyScore = -1i32;
let mut x = secondPeak;
while x > firstPeak {
// for (int x = secondPeak - 1; x > firstPeak; x--) {
let fromFirst = x - firstPeak;
let score =
fromFirst * fromFirst * (secondPeak - x) * (maxBucketCount - buckets[x]) as usize;
if score as i32 > bestValleyScore {
bestValley = x;
bestValleyScore = score as i32;
}
x -= 1;
}
Ok((bestValley as u32) << GlobalHistogramBinarizer::LUMINANCE_SHIFT)
}
}
/*
* Copyright 2009 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// package com.google.zxing.common;
// import com.google.zxing.Binarizer;
// import com.google.zxing.LuminanceSource;
// import com.google.zxing.NotFoundException;
/**
* This class implements a local thresholding algorithm, which while slower than the
* GlobalHistogramBinarizer, is fairly efficient for what it does. It is designed for
* high frequency images of barcodes with black data on white backgrounds. For this application,
* it does a much better job than a global blackpoint with severe shadows and gradients.
* However it tends to produce artifacts on lower frequency images and is therefore not
* a good general purpose binarizer for uses outside ZXing.
*
* This class extends GlobalHistogramBinarizer, using the older histogram approach for 1D readers,
* and the newer local approach for 2D readers. 1D decoding using a per-row histogram is already
* inherently local, and only fails for horizontal gradients. We can revisit that problem later,
* but for now it was not a win to use local blocks for 1D.
*
* This Binarizer is the default for the unit tests and the recommended class for library users.
*
* @author dswitkin@google.com (Daniel Switkin)
*/
pub struct HybridBinarizer {
//width: usize,
//height: usize,
//source: Box,
ghb: GlobalHistogramBinarizer,
// matrix :Option,
}
impl Binarizer for HybridBinarizer {
fn getLuminanceSource(&self) -> &Box {
self.ghb.getLuminanceSource()
}
fn getBlackRow(&self, y: usize, row: &mut BitArray) -> Result {
self.ghb.getBlackRow(y, row)
}
/**
* Calculates the final BitMatrix once for all requests. This could be called once from the
* constructor instead, but there are some advantages to doing it lazily, such as making
* profiling easier, and not doing heavy lifting when callers don't expect it.
*/
fn getBlackMatrix(&self) -> Result {
// if self.matrix.is_some() {
// return Ok(self.matrix.clone().unwrap())
// }
let matrix;
let source = self.getLuminanceSource();
let width = source.getWidth();
let height = source.getHeight();
if width >= HybridBinarizer::MINIMUM_DIMENSION
&& height >= HybridBinarizer::MINIMUM_DIMENSION
{
let luminances = source.getMatrix();
let mut sub_width = width >> HybridBinarizer::BLOCK_SIZE_POWER;
if (width & HybridBinarizer::BLOCK_SIZE_MASK) != 0 {
sub_width += 1;
}
let mut sub_height = height >> HybridBinarizer::BLOCK_SIZE_POWER;
if (height & HybridBinarizer::BLOCK_SIZE_MASK) != 0 {
sub_height += 1;
}
let black_points = Self::calculateBlackPoints(
&luminances,
sub_width as u32,
sub_height as u32,
width as u32,
height as u32,
);
let mut new_matrix = BitMatrix::new(width as u32, height as u32)?;
Self::calculateThresholdForBlock(
&luminances,
sub_width as u32,
sub_height as u32,
width as u32,
height as u32,
&black_points,
&mut new_matrix,
);
matrix = new_matrix;
} else {
// If the image is too small, fall back to the global histogram approach.
matrix = self.ghb.getBlackMatrix()?;
}
// dbg!(matrix.to_string());
Ok(matrix)
}
fn createBinarizer(&self, source: Box) -> Box {
Box::new(HybridBinarizer::new(source))
}
fn getWidth(&self) -> usize {
self.ghb.getWidth()
}
fn getHeight(&self) -> usize {
self.ghb.getHeight()
}
}
impl HybridBinarizer {
// This class uses 5x5 blocks to compute local luminance, where each block is 8x8 pixels.
// So this is the smallest dimension in each axis we can accept.
const BLOCK_SIZE_POWER: usize = 3;
const BLOCK_SIZE: usize = 1 << HybridBinarizer::BLOCK_SIZE_POWER; // ...0100...00
const BLOCK_SIZE_MASK: usize = HybridBinarizer::BLOCK_SIZE - 1; // ...0011...11
const MINIMUM_DIMENSION: usize = HybridBinarizer::BLOCK_SIZE * 5;
const MIN_DYNAMIC_RANGE: usize = 24;
pub fn new(source: Box) -> Self {
Self {
ghb: GlobalHistogramBinarizer::new(source),
// matrix: None,
}
}
/**
* For each block in the image, calculate the average black point using a 5x5 grid
* of the blocks around it. Also handles the corner cases (fractional blocks are computed based
* on the last pixels in the row/column which are also used in the previous block).
*/
fn calculateThresholdForBlock(
luminances: &[u8],
sub_width: u32,
sub_height: u32,
width: u32,
height: u32,
black_points: &Vec>,
matrix: &mut BitMatrix,
) {
let maxYOffset = height - HybridBinarizer::BLOCK_SIZE as u32;
let maxXOffset = width - HybridBinarizer::BLOCK_SIZE as u32;
for y in 0..sub_height {
// for (int y = 0; y < subHeight; y++) {
let mut yoffset = y << HybridBinarizer::BLOCK_SIZE_POWER;
if yoffset > maxYOffset {
yoffset = maxYOffset;
}
let top = Self::cap(y, sub_height - 3);
for x in 0..sub_width {
// for (int x = 0; x < subWidth; x++) {
let mut xoffset = x << HybridBinarizer::BLOCK_SIZE_POWER;
if xoffset > maxXOffset {
xoffset = maxXOffset;
}
let left = Self::cap(x, sub_width - 3);
let mut sum = 0;
for z in -2i32..=2 {
// for (int z = -2; z <= 2; z++) {
let blackRow = &black_points[(top as i32 + z) as usize];
sum += blackRow[(left - 2) as usize]
+ blackRow[(left - 1) as usize]
+ blackRow[left as usize]
+ blackRow[(left + 1) as usize]
+ blackRow[(left + 2) as usize];
}
let average = sum / 25;
Self::thresholdBlock(luminances, xoffset, yoffset, average, width, matrix);
}
}
}
fn cap(value: u32, max: u32) -> u32 {
if value < 2 {
2
} else {
value.min(max)
}
}
/**
* Applies a single threshold to a block of pixels.
*/
fn thresholdBlock(
luminances: &[u8],
xoffset: u32,
yoffset: u32,
threshold: u32,
stride: u32,
matrix: &mut BitMatrix,
) {
let mut offset = yoffset * stride + xoffset;
for y in 0..HybridBinarizer::BLOCK_SIZE {
// for (int y = 0, offset = yoffset * stride + xoffset; y < HybridBinarizer::BLOCK_SIZE; y++, offset += stride) {
for x in 0..HybridBinarizer::BLOCK_SIZE {
// for (int x = 0; x < HybridBinarizer::BLOCK_SIZE; x++) {
// Comparison needs to be <= so that black == 0 pixels are black even if the threshold is 0.
if luminances[offset as usize + x] as u32 <= threshold {
matrix.set(xoffset + x as u32, yoffset + y as u32);
}
}
offset += stride;
}
}
/**
* Calculates a single black point for each block of pixels and saves it away.
* See the following thread for a discussion of this algorithm:
* http://groups.google.com/group/zxing/browse_thread/thread/d06efa2c35a7ddc0
*/
fn calculateBlackPoints(
luminances: &[u8],
subWidth: u32,
subHeight: u32,
width: u32,
height: u32,
) -> Vec> {
let maxYOffset = height as usize - HybridBinarizer::BLOCK_SIZE;
let maxXOffset = width as usize - HybridBinarizer::BLOCK_SIZE;
let mut blackPoints = vec![vec![0; subWidth as usize]; subHeight as usize];
for y in 0..subHeight {
// for (int y = 0; y < subHeight; y++) {
let mut yoffset = y << HybridBinarizer::BLOCK_SIZE_POWER;
if yoffset > maxYOffset as u32 {
yoffset = maxYOffset as u32;
}
for x in 0..subWidth {
// for (int x = 0; x < subWidth; x++) {
let mut xoffset = x << HybridBinarizer::BLOCK_SIZE_POWER;
if xoffset > maxXOffset as u32 {
xoffset = maxXOffset as u32;
}
let mut sum = 0u32;
let mut min = 0xff;
let mut max = 0;
let mut offset = yoffset * width + xoffset;
let mut yy = 0;
while yy < HybridBinarizer::BLOCK_SIZE {
// for (int yy = 0, offset = yoffset * width + xoffset; yy < HybridBinarizer::BLOCK_SIZE; yy++, offset += width) {
for xx in 0..HybridBinarizer::BLOCK_SIZE {
// for (int xx = 0; xx < HybridBinarizer::BLOCK_SIZE; xx++) {
let pixel = luminances[offset as usize + xx];
sum += pixel as u32;
// still looking for good contrast
if pixel < min {
min = pixel;
}
if pixel > max {
max = pixel;
}
}
// short-circuit min/max tests once dynamic range is met
if (max - min) as usize > HybridBinarizer::MIN_DYNAMIC_RANGE {
// finish the rest of the rows quickly
offset += width;
yy += 1;
while yy < HybridBinarizer::BLOCK_SIZE {
// for (yy++, offset += width; yy < HybridBinarizer::BLOCK_SIZE; yy++, offset += width) {
for xx in 0..HybridBinarizer::BLOCK_SIZE {
// for (int xx = 0; xx < BLOCK_SIZE; xx++) {
sum += luminances[offset as usize + xx] as u32;
}
yy += 1;
offset += width;
}
break;
}
yy += 1;
offset += width;
}
// The default estimate is the average of the values in the block.
let mut average = sum >> (HybridBinarizer::BLOCK_SIZE_POWER * 2);
if (max - min) as usize <= HybridBinarizer::MIN_DYNAMIC_RANGE {
// If variation within the block is low, assume this is a block with only light or only
// dark pixels. In that case we do not want to use the average, as it would divide this
// low contrast area into black and white pixels, essentially creating data out of noise.
//
// The default assumption is that the block is light/background. Since no estimate for
// the level of dark pixels exists locally, use half the min for the block.
average = min as u32 / 2;
if y > 0 && x > 0 {
// Correct the "white background" assumption for blocks that have neighbors by comparing
// the pixels in this block to the previously calculated black points. This is based on
// the fact that dark barcode symbology is always surrounded by some amount of light
// background for which reasonable black point estimates were made. The bp estimated at
// the boundaries is used for the interior.
// The (min < bp) is arbitrary but works better than other heuristics that were tried.
let average_neighbor_black_point: u32 = (blackPoints[y as usize - 1]
[x as usize]
+ (2 * blackPoints[y as usize][x as usize - 1])
+ blackPoints[y as usize - 1][x as usize - 1])
/ 4;
if (min as u32) < average_neighbor_black_point {
average = average_neighbor_black_point;
}
}
}
blackPoints[y as usize][x as usize] = average;
}
}
blackPoints
}
}