package com.fr.base.svg;

import javax.swing.Icon;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

/**
 * SVG转化而来的Icon
 * @author Yvan
 * @version 10.0
 * Created by Yvan on 2020/12/17
 */
public class SVGIcon implements Icon {

    private BufferedImage image;

    private static final boolean HI_DPI_SURPORT = SystemScaleUtils.isJreHiDPIEnabled();

    public static final float SYSTEM_SCALE = SystemScaleUtils.sysScale();

    private static final String ICON_PREFIX = "/";

    public SVGIcon(BufferedImage image) {
        this.image = image;
    }

    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        if (HI_DPI_SURPORT) {
            Graphics2D graphics = (Graphics2D) g.create(x, y, image.getWidth(null), image.getHeight(null));
            float scale = SYSTEM_SCALE;
            graphics.scale(1 / scale, 1 / scale);
            graphics.drawImage(image, 0, 0, null);
            graphics.scale(1.0D, 1.0D);
            graphics.dispose();
        } else {
            g.drawImage(image, x, y, null);
        }
    }

    @Override
    public int getIconWidth() {
        return HI_DPI_SURPORT ? (int) (image.getWidth() / SYSTEM_SCALE) : image.getWidth();
    }

    @Override
    public int getIconHeight() {
        return HI_DPI_SURPORT ? (int) (image.getHeight() / SYSTEM_SCALE) : image.getHeight();
    }

    /**
     * 外界读取高清图标，默认尺寸为16*16
     * @param url
     * @return
     */
    public static Icon readSVGIcon(String url) {
        if (!url.startsWith(ICON_PREFIX)) {
            url = ICON_PREFIX + url;
        }
        return new SVGIcon((BufferedImage) SVGLoader.load(url));
    }

    /**
     * 读取指定尺寸的图标
     * @param url 资源路径
     * @param width 宽度
     * @param height 高度
     * @return
     */
    public static Icon readSVGIcon(String url, float width, float height) {
        if (!url.startsWith(ICON_PREFIX)) {
            url = ICON_PREFIX + url;
        }
        return new SVGIcon((BufferedImage) SVGLoader.load(url, width, height));
    }
}