TextGraphicsConverter.java - java - Rustam1977/MAIN

TextGraphicsConverter.java
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Rustam1977
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27 сен 2025, 16:20
27 сен 2025, 16:20eacb2c6
package ru.netology.graphics.image;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
import java.io.IOException;
import java.net.URL;

public class Converter implements TextGraphicsConverter {

    private double maxRatio = 0;
    private int maxWidth = 0;
    private int maxHeight = 0;
    private TextColorSchema schema = new Schema();

    @Override
    public String convert(String url) throws IOException, BadImageSizeException {
        BufferedImage img = ImageIO.read(new URL(url));

        // Проверка соотношения сторон
        double ratio = (double) img.getWidth() / img.getHeight();
        if (maxRatio > 0 && ratio > maxRatio) {
            throw new BadImageSizeException(ratio, maxRatio);
        }

        // Масштабирование изображения
        int newWidth = img.getWidth();
        int newHeight = img.getHeight();
        if (maxWidth > 0 || maxHeight > 0) {
            double widthRatio = maxWidth > 0 ? (double) maxWidth / newWidth : 1.0;
            double heightRatio = maxHeight > 0 ? (double) maxHeight / newHeight : 1.0;
            double scale = Math.min(widthRatio, heightRatio);
            if (scale < 1) {
                newWidth = (int) (newWidth * scale);
                newHeight = (int) (newHeight * scale);
            }
        }

        Image scaledImage = img.getScaledInstance(newWidth, newHeight, BufferedImage.SCALE_SMOOTH);
        BufferedImage bwImg = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_BYTE_GRAY);
        Graphics2D graphics = bwImg.createGraphics();
        graphics.drawImage(scaledImage, 0, 0, null);
        WritableRaster bwRaster = bwImg.getRaster();

        StringBuilder sb = new StringBuilder();
        for (int h = 0; h < newHeight; h++) {
            for (int w = 0; w < newWidth; w++) {
                int color = bwRaster.getPixel(w, h, new int[3])[0];
                char c = schema.convert(color);
                sb.append(c).append(c); // Дублируем символ
            }
            sb.append('\n');
        }

        return sb.toString();
    }

    // Методы установки параметров (сеттеры)
    @Override
    public void setMaxWidth(int width) {
        this.maxWidth = width;
    }

    @Override
    public void setMaxHeight(int height) {
        this.maxHeight = height;
    }

    @Override
    public void setMaxRatio(double maxRatio) {
        this.maxRatio = maxRatio;
    }

    @Override
    public void setTextColorSchema(TextColorSchema schema) {
        this.schema = schema;
    }
}