cleaned up many warnings

src/binary_bitmap.rs

@@ -0,0 +1,164 @@
+
+/*
+ * 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;
+
+use std::fmt;
+
+use crate::{common::{BitMatrix, BitArray}, Exceptions, Binarizer};
+
+/**
+ * This class is the core bitmap class used by ZXing to represent 1 bit data. Reader objects
+ * accept a BinaryBitmap and attempt to decode it.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+pub struct BinaryBitmap {
+    binarizer: Box<dyn Binarizer>,
+    matrix: BitMatrix,
+}
+
+impl BinaryBitmap {
+    pub fn new(binarizer: Box<dyn Binarizer>) -> Self {
+        Self {
+            matrix: binarizer.getBlackMatrix().unwrap(),
+            binarizer: binarizer,
+        }
+    }
+
+    /**
+     * @return The width of the bitmap.
+     */
+    pub fn getWidth(&self) -> usize {
+        return self.binarizer.getWidth();
+    }
+
+    /**
+     * @return The height of the bitmap.
+     */
+    pub fn getHeight(&self) -> usize {
+        return self.binarizer.getHeight();
+    }
+
+    /**
+     * Converts one row of luminance data to 1 bit data. May actually do the conversion, or return
+     * cached data. Callers should assume this method is expensive and call it as seldom as possible.
+     * This method is intended for decoding 1D barcodes and may choose to apply sharpening.
+     *
+     * @param y The row to fetch, which must be in [0, bitmap height)
+     * @param row An optional preallocated array. If null or too small, it will be ignored.
+     *            If used, the Binarizer will call BitArray.clear(). Always use the returned object.
+     * @return The array of bits for this row (true means black).
+     * @throws NotFoundException if row can't be binarized
+     */
+    pub fn getBlackRow(&self, y: usize, row: &mut BitArray) -> Result<BitArray, Exceptions> {
+        return self.binarizer.getBlackRow(y, row);
+    }
+
+    /**
+     * Converts a 2D array of luminance data to 1 bit. As above, assume this method is expensive
+     * and do not call it repeatedly. This method is intended for decoding 2D barcodes and may or
+     * may not apply sharpening. Therefore, a row from this matrix may not be identical to one
+     * fetched using getBlackRow(), so don't mix and match between them.
+     *
+     * @return The 2D array of bits for the image (true means black).
+     * @throws NotFoundException if image can't be binarized to make a matrix
+     */
+    pub fn getBlackMatrix(&self) -> Result<&BitMatrix, Exceptions> {
+        // The matrix is created on demand the first time it is requested, then cached. There are two
+        // reasons for this:
+        // 1. This work will never be done if the caller only installs 1D Reader objects, or if a
+        //    1D Reader finds a barcode before the 2D Readers run.
+        // 2. This work will only be done once even if the caller installs multiple 2D Readers.
+        return Ok(&self.matrix);
+    }
+
+    /**
+     * @return Whether this bitmap can be cropped.
+     */
+    pub fn isCropSupported(&self) -> bool {
+        let b = &self.binarizer;
+        let r = &b.getLuminanceSource();
+        let isCropOk = r.isCropSupported();
+        return isCropOk;
+    }
+
+    /**
+     * Returns a new object with cropped image data. Implementations may keep a reference to the
+     * original data rather than a copy. Only callable if isCropSupported() is true.
+     *
+     * @param left The left coordinate, which must be in [0,getWidth())
+     * @param top The top coordinate, which must be in [0,getHeight())
+     * @param width The width of the rectangle to crop.
+     * @param height The height of the rectangle to crop.
+     * @return A cropped version of this object.
+     */
+    pub fn crop(&self, left: usize, top: usize, width: usize, height: usize) -> BinaryBitmap {
+        let newSource = self
+            .binarizer
+            .getLuminanceSource()
+            .crop(left, top, width, height);
+        return BinaryBitmap::new(
+            self.binarizer
+                .createBinarizer(newSource.expect("new lum source expected")),
+        );
+    }
+
+    /**
+     * @return Whether this bitmap supports counter-clockwise rotation.
+     */
+    pub fn isRotateSupported(&self) -> bool {
+        return self.binarizer.getLuminanceSource().isRotateSupported();
+    }
+
+    /**
+     * Returns a new object with rotated image data by 90 degrees counterclockwise.
+     * Only callable if {@link #isRotateSupported()} is true.
+     *
+     * @return A rotated version of this object.
+     */
+    pub fn rotateCounterClockwise(&self) -> BinaryBitmap {
+        let newSource = self.binarizer.getLuminanceSource().rotateCounterClockwise();
+        return BinaryBitmap::new(
+            self.binarizer
+                .createBinarizer(newSource.expect("new lum source expected")),
+        );
+    }
+
+    /**
+     * Returns a new object with rotated image data by 45 degrees counterclockwise.
+     * Only callable if {@link #isRotateSupported()} is true.
+     *
+     * @return A rotated version of this object.
+     */
+    pub fn rotateCounterClockwise45(&self) -> BinaryBitmap {
+        let newSource = self
+            .binarizer
+            .getLuminanceSource()
+            .rotateCounterClockwise45();
+        return BinaryBitmap::new(
+            self.binarizer
+                .createBinarizer(newSource.expect("new lum source expected")),
+        );
+    }
+}
+
+impl fmt::Display for BinaryBitmap {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.getBlackMatrix().unwrap())
+    }
+}