package com.xzx.gc.common.utils.image;
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import com.google.zxing.LuminanceSource;
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import java.awt.*;
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import java.awt.geom.AffineTransform;
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import java.awt.image.BufferedImage;
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public class BufferedImageLuminanceSource extends LuminanceSource {
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private final BufferedImage image;
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private final int left;
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private final int top;
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public BufferedImageLuminanceSource(BufferedImage image) {
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this(image, 0, 0, image.getWidth(), image.getHeight());
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}
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public BufferedImageLuminanceSource(BufferedImage image, int left,
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int top, int width, int height) {
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super(width, height);
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int sourceWidth = image.getWidth();
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int sourceHeight = image.getHeight();
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if (left + width > sourceWidth || top + height > sourceHeight) {
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throw new IllegalArgumentException(
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"Crop rectangle does not fit within image data.");
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}
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for (int y = top; y < top + height; y++) {
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for (int x = left; x < left + width; x++) {
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if ((image.getRGB(x, y) & 0xFF000000) == 0) {
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// = white
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image.setRGB(x, y, 0xFFFFFFFF);
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}
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}
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}
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this.image = new BufferedImage(sourceWidth, sourceHeight,
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BufferedImage.TYPE_BYTE_GRAY);
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this.image.getGraphics().drawImage(image, 0, 0, null);
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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(
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"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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image.getRaster().getDataElements(left, top + y, width, 1, row);
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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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int area = width * height;
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byte[] matrix = new byte[area];
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image.getRaster().getDataElements(left, top, width, height, matrix);
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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 BufferedImageLuminanceSource(image, this.left + left,
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this.top + top, width, height);
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}
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@Override
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public boolean isRotateSupported() {
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return true;
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}
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@Override
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public LuminanceSource rotateCounterClockwise() {
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int sourceWidth = image.getWidth();
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int sourceHeight = image.getHeight();
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AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0,
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0.0, 0.0, sourceWidth);
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BufferedImage rotatedImage = new BufferedImage(sourceHeight,
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sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
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Graphics2D g = rotatedImage.createGraphics();
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g.drawImage(image, transform, null);
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g.dispose();
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int width = getWidth();
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return new BufferedImageLuminanceSource(rotatedImage, top,
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sourceWidth - (left + width), getHeight(), width);
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}
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}
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