TextGraphicsConverterImpl.java - master - akupan2012/kursova

TextGraphicsConverterImpl.java
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akupan2012
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19 янв 2026, 15:48
19 янв 2026, 15:480a0929a
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;
import java.nio.Buffer;

public class TextGraphicsConverterImpl implements TextGraphicsConverter {
    private double maxRatio = 0;
    private int maxWidth = 0;
    private int maxHeight = 0;
    private TextColorSchema schema = new TextColorSchemaImpl();

    @Override
    public String convert(String url)throws IOException, BadImageSizeException{
        BufferedImage img = ImageIO.read(new URL(url));
        if (maxRatio > 0){
            double ratio =(double) img.getWidth()/ img.getHeight();
            if (ratio > maxRatio){
                throw new BadImageSizeException(ratio, maxRatio);
            }
        }
        int newWidht = img.getWidth();
        int newHeight = img.getHeight();
        if (maxWidth > 0 && newWidht > maxWidth){
            double scale = (double) maxHeight/newHeight;
            newHeight = maxHeight;
            newWidht = (int) (newWidht * scale);
        }
        Image scaledImage = img.getScaledInstance(newWidht, newHeight, BufferedImage.SCALE_SMOOTH);
        BufferedImage bwImg = new BufferedImage(newWidht,newHeight,BufferedImage.TYPE_BYTE_GRAY);
        Graphics2D graphics= bwImg.createGraphics();
        graphics.drawImage(scaledImage, 0, 0, null);
        graphics.dispose();
        WritableRaster raster = bwImg.getRaster();
        StringBuilder result = new StringBuilder();
        for (int h = 0; h < newHeight; h++){
            for (int w = 0; w < newWidht; w++){
                int color = raster.getPixel(w, h, new int [3])[0];
                char c = schema.convert(color);
                result.append(c).append(c);
            }
            result.append("\n");
        }
        return result.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){
        if (schema != null){
            this.schema = schema;
        }
    }

}