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RGBLuminanceSource
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Henry
@@ -1,136 +0,0 @@
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/*
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* Copyright 2009 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.zxing;
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/**
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* This class is used to help decode images from files which arrive as RGB data from
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* an ARGB pixel array. It does not support rotation.
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*
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* @author dswitkin@google.com (Daniel Switkin)
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* @author Betaminos
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*/
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public final class RGBLuminanceSource extends LuminanceSource {
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private final byte[] luminances;
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private final int dataWidth;
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private final int dataHeight;
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private final int left;
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private final int top;
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public RGBLuminanceSource(int width, int height, int[] pixels) {
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super(width, height);
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dataWidth = width;
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dataHeight = height;
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left = 0;
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top = 0;
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// In order to measure pure decoding speed, we convert the entire image to a greyscale array
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// up front, which is the same as the Y channel of the YUVLuminanceSource in the real app.
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//
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// Total number of pixels suffices, can ignore shape
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int size = width * height;
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luminances = new byte[size];
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for (int offset = 0; offset < size; offset++) {
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int pixel = pixels[offset];
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int r = (pixel >> 16) & 0xff; // red
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int g2 = (pixel >> 7) & 0x1fe; // 2 * green
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int b = pixel & 0xff; // blue
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// Calculate green-favouring average cheaply
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luminances[offset] = (byte) ((r + g2 + b) / 4);
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}
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}
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private RGBLuminanceSource(byte[] pixels,
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int dataWidth,
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int dataHeight,
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int left,
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int top,
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int width,
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int height) {
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super(width, height);
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if (left + width > dataWidth || top + height > dataHeight) {
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throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
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}
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this.luminances = pixels;
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this.dataWidth = dataWidth;
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this.dataHeight = dataHeight;
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this.left = left;
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this.top = top;
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}
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@Override
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public byte[] getRow(int y, byte[] row) {
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if (y < 0 || y >= getHeight()) {
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throw new IllegalArgumentException("Requested row is outside the image: " + y);
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}
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int width = getWidth();
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if (row == null || row.length < width) {
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row = new byte[width];
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}
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int offset = (y + top) * dataWidth + left;
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System.arraycopy(luminances, offset, row, 0, width);
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return row;
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}
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@Override
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public byte[] getMatrix() {
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int width = getWidth();
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int height = getHeight();
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// If the caller asks for the entire underlying image, save the copy and give them the
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// original data. The docs specifically warn that result.length must be ignored.
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if (width == dataWidth && height == dataHeight) {
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return luminances;
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}
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int area = width * height;
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byte[] matrix = new byte[area];
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int inputOffset = top * dataWidth + left;
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// If the width matches the full width of the underlying data, perform a single copy.
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if (width == dataWidth) {
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System.arraycopy(luminances, inputOffset, matrix, 0, area);
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return matrix;
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}
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// Otherwise copy one cropped row at a time.
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for (int y = 0; y < height; y++) {
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int outputOffset = y * width;
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System.arraycopy(luminances, inputOffset, matrix, outputOffset, width);
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inputOffset += dataWidth;
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}
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return matrix;
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}
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@Override
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public boolean isCropSupported() {
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return true;
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}
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@Override
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public LuminanceSource crop(int left, int top, int width, int height) {
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return new RGBLuminanceSource(luminances,
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dataWidth,
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dataHeight,
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this.left + left,
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this.top + top,
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width,
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height);
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}
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}
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168
src/lib.rs
168
src/lib.rs
@@ -1842,3 +1842,171 @@ impl LuminanceSource for PlanarYUVLuminanceSource{
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}
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}
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/*
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* Copyright 2009 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//package com.google.zxing;
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/**
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* This class is used to help decode images from files which arrive as RGB data from
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* an ARGB pixel array. It does not support rotation.
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*
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* @author dswitkin@google.com (Daniel Switkin)
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* @author Betaminos
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*/
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pub struct RGBLuminanceSource {
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luminances:Vec<u8>,
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dataWidth:usize,
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dataHeight:usize,
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left:usize,
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top:usize,
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width:usize,
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height:usize,
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}
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impl LuminanceSource for RGBLuminanceSource {
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fn new( width:usize, height:usize) -> Self {
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let new_ils : Self;
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new_ils.width = width;
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new_ils.height = height;
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new_ils
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}
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fn getRow(&self, y:usize, row:&Vec<u8>) -> Vec<u8> {
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if y < 0 || y >= self.getHeight() {
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panic!("Requested row is outside the image: {}" , y);
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}
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let width = self.getWidth();
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let offset = (y + self.top) *self. dataWidth + self.left;
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row[0..width].clone_from_slice(&self.luminances[offset..width]);
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//System.arraycopy(self.luminances, offset, row, 0, width);
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return row;
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}
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fn getMatrix(&self) -> Vec<u8> {
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let width =self. getWidth();
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let height = self.getHeight();
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// If the caller asks for the entire underlying image, save the copy and give them the
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// original data. The docs specifically warn that result.length must be ignored.
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if (width == self.dataWidth && height == self.dataHeight) {
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return self.luminances;
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}
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let area = width * height;
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let mut matrix = Vec::with_capacity(area);
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let mut inputOffset = self.top * self.dataWidth + self.left;
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// If the width matches the full width of the underlying data, perform a single copy.
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if (width == self.dataWidth) {
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matrix[0..area].clone_from_slice(&self.luminances[inputOffset..area]);
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//System.arraycopy(self.luminances, inputOffset, matrix, 0, area);
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return matrix;
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}
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// Otherwise copy one cropped row at a time.
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for y in 0..height{
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//for (int y = 0; y < height; y++) {
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let outputOffset = y * width;
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matrix[outputOffset..width].clone_from_slice(&self.luminances[inputOffset..width]);
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//System.arraycopy(luminances, inputOffset, matrix, outputOffset, width);
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inputOffset += self.dataWidth;
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}
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return matrix;
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}
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fn getWidth(&self) -> usize {
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self.width
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}
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fn getHeight(&self) -> usize {
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self.height
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}
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fn isCropSupported(&self) -> bool {
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return true;
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}
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fn crop(&self, left:usize, top:usize, width:usize, height:usize) -> Result<dyn LuminanceSource,UnsupportedOperationException> {
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match RGBLuminanceSource::new_complex(&self.luminances,
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self.dataWidth,
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self.dataHeight,
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self.left + left,
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self.top + top,
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width,
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height) {
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Ok(crop) => Ok(crop),
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Err(error) => Err(UnsupportedOperationException::new()),
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}
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}
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}
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impl RGBLuminanceSource {
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pub fn new_with_width_height_pixels( width:usize, height:usize, pixels:&Vec<usize>) -> Self{
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//super(width, height);
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let dataWidth = width;
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let dataHeight = height;
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let left = 0;
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let top = 0;
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// In order to measure pure decoding speed, we convert the entire image to a greyscale array
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// up front, which is the same as the Y channel of the YUVLuminanceSource in the real app.
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//
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// Total number of pixels suffices, can ignore shape
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let size = width * height;
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let mut luminances:Vec<u8> = Vec::with_capacity(size);
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for offset in 0..size{
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//for (int offset = 0; offset < size; offset++) {
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let pixel = pixels[offset];
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let r = (pixel >> 16) & 0xff; // red
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let g2 = (pixel >> 7) & 0x1fe; // 2 * green
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let b = pixel & 0xff; // blue
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// Calculate green-favouring average cheaply
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luminances[offset] = ((r + g2 + b) / 4);
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}
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Self { luminances, dataWidth, dataHeight, left: left, top: top, width, height }
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}
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fn new_complex( pixels:&Vec<u8>,
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dataWidth:usize,
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dataHeight:usize,
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left:usize,
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top:usize,
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width:usize,
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height:usize) -> Result<Self,IllegalArgumentException>{
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if (left + width > dataWidth || top + height > dataHeight) {
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return Err(IllegalArgumentException::new("Crop rectangle does not fit within image data."));
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}
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Ok(Self{
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luminances: todo!(),
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dataWidth,
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dataHeight,
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left,
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top,
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width,
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height,
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})
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}
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}
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