package com.dpkj.modules.print.utils;

import com.itextpdf.text.pdf.BaseFont;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * @author 余文财
 * @description 字体加载
 * @date 2025.6.24
 */
public class FontLoader {
    public static BaseFont loadFont(String resourcePath) {
        try (InputStream fontStream = FontLoader.class.getResourceAsStream(resourcePath)) {
            if (fontStream == null) {
                throw new IllegalArgumentException("字体文件未找到: " + resourcePath);
            }
            byte[] fontBytes = toByteArray(fontStream);
            return BaseFont.createFont(
                    resourcePath,
                    BaseFont.IDENTITY_H,
                    BaseFont.EMBEDDED,
                    false,
                    fontBytes,
                    null
            );
        } catch (Exception e) {
            throw new RuntimeException("字体加载失败: " + resourcePath, e);
        }
    }

    private static byte[] toByteArray(InputStream input) throws IOException {
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        int nRead;
        byte[] data = new byte[4096];
        while ((nRead = input.read(data, 0, data.length)) != -1) {
            buffer.write(data, 0, nRead);
        }
        return buffer.toByteArray();
    }
}