TextGraphicsConverterImpl.java - master - times/convert

TextGraphicsConverterImpl.java

100 строк3 KB

times

create: Main.java, GServer.java, TextColorSchema.java, TextGraphicsConverter.java, TextGraphicsConverterImpl.java, BadImageSizeException.java, DefaultTextColorSchema.java

28 апр 2026, 19:49

Верифицирован

28 апр 2026, 19:49c784040

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 TextGraphicsConverterImpl implements TextGraphicsConverter {

    TextColorSchema schema;
    int maxWidth;
    int maxHeight;
    double maxRatio;

    @Override
    public String convert(String url) throws IOException, BadImageSizeException {
        URL imageUrl = new URL(url);
        BufferedImage img = ImageIO.read(imageUrl);
        double width = img.getWidth();
        double height = img.getHeight();
        double size;

        if (height > width) {
            size = height / width;
        } else {
            size = width / height;
        }
        if (maxRatio != 0 && size > maxRatio) {
            throw new BadImageSizeException(size, maxRatio);
        }
        double widthRatio;
        double heightRatio;
        double maxResult = 0;

        if (maxWidth == 0) {
            widthRatio = 1;
        } else {
            widthRatio = width / maxWidth;
        }
        if (maxHeight == 0) {
            heightRatio = 1;
        } else {
            heightRatio = height / maxHeight;
        }
        if (widthRatio > heightRatio) {
            maxResult = widthRatio;
        } else {
            maxResult = heightRatio;
        }
        double newWidth;
        double newHeight;
        newWidth = width / maxResult;
        newHeight = height / maxResult;
        newWidth = (int) newWidth;
        newHeight = (int) newHeight;
        BufferedImage blackAndWhite = new BufferedImage((int) newWidth, (int) newHeight, BufferedImage.TYPE_BYTE_GRAY);
        Graphics2D graphics = blackAndWhite.createGraphics();
        graphics.drawImage(img, 0, 0, (int) newWidth, (int) newHeight, null);

        WritableRaster pixel = blackAndWhite.getRaster();
        int[] pixels = new int[1];
        StringBuilder builder = new StringBuilder();

        if (schema == null) {
            schema = new DefaultTextColorSchema();
        }

        for (int h = 0; h < (int) newHeight; h++) {
            for (int w = 0; w < (int) newWidth; w++) {
                pixel.getPixel(w, h, pixels);
                char result = schema.convert(pixels[0]);
                builder.append(result);
            }
            builder.append("\n");
        }
        return builder.toString();
    }

    @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;
    }
}