Converter.java - master - SofiMut/2dGraphic

Converter.java
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Софья Степанова
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23 авг 2025, 08:14
23 авг 2025, 08:141a5ea03
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 {

    protected TextColorSchema scheme = new Spectrum();

    protected int maxWidth;
    protected int maxHeight;
    protected double maxRatio;
    protected double myImageRatio;


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

        int newWidth = myImage.getWidth();
        int newHeight = myImage.getHeight();


        if (newWidth > this.maxWidth) {

            double rdc = (double) newWidth / this.maxWidth;
            newWidth = (int) (newWidth / rdc);
            newHeight = (int) (newHeight / rdc);
        }

        if (newHeight > this.maxHeight) {
            double rdc = (double) newHeight / this.maxHeight;
            newHeight = (int) (newHeight / rdc);
            newWidth = (int) (newWidth / rdc);

        }


        double myImageRatio = (double) getRatio(newWidth, newHeight);
        if (myImageRatio > this.maxRatio || myImageRatio == 0) {
            throw new BadImageSizeException(myImageRatio, this.maxRatio);
        }


        Image scaledImage = myImage.getScaledInstance(newWidth, newHeight, BufferedImage.SCALE_SMOOTH);

        BufferedImage bwImg = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_BYTE_GRAY);
        Graphics2D graphics = bwImg.createGraphics();
        WritableRaster bwRaster = bwImg.getRaster();


        graphics.drawImage(scaledImage, 0, 0, null);

        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 = scheme.convert(color);
                sb.append(c);
                sb.append(c);

            }
            sb.append("\n");
        }

        return sb.toString();

    }

    protected double getRatio(int newWidth, int newHeight) {
        if (newWidth > newHeight) {
            myImageRatio = (double) newWidth / newHeight;
        } else if (newHeight > newWidth) {
            myImageRatio = (double) newHeight / newWidth;
        }
        return myImageRatio;
    }


    @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 scheme) {
        this.scheme = scheme;
    }


}