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canvas-text-renderer

v0.0.1

Published

This is a renderer that converts text into canvas rendering

Readme

canvas-text-renderer

一个高性能的文本渲染库,可以将文本内容渲染到 Canvas 画布上,支持分页、自动换行等功能。

特性

  • 🚀 高性能:基于 Canvas 渲染,性能优异
  • 📝 自动换行:智能处理文本换行
  • 📖 分页支持:自动将长文本分页展示
  • 🎨 样式可配:支持自定义字体、颜色、行高等样式
  • 📱 响应式:支持高 DPI 屏幕

安装

npm install canvas-text-renderer
# 或者
yarn add canvas-text-renderer
# 或者
pnpm add canvas-text-renderer

使用示例

import { CanvasTextRenderer } from 'canvas-text-renderer';

// 创建渲染器实例
const container = document.getElementById('container');
const renderer = new CanvasTextRenderer(container, {
  width: 800,
  height: 600,
  padding: { top: 20, right: 20, bottom: 20, left: 20 },
  fontSize: 16,
  fontFamily: 'Arial',
  lineHeight: 24,
  backgroundColor: '#ffffff',
  textColor: '#000000',
});

// 渲染文本
renderer.render('你的文本内容');

// 翻页操作
renderer.nextPage(); // 下一页
renderer.prevPage(); // 上一页

// 导出功能
renderer.downloadCurrentPage(); // 下载当前页
renderer.downloadAll(); // 下载所有页面

// 清理资源
renderer.unmount();

API 文档

CanvasTextRenderer

构造函数

new CanvasTextRenderer(container: HTMLElement, options: CreateCancvasTextRendererOptions)

配置项

interface CreateCancvasTextRendererOptions {
  width: number; // 画布宽度
  height: number; // 画布高度
  padding: {
    // 内边距
    top: number;
    right: number;
    bottom: number;
    left: number;
  };
  fontSize: number; // 字体大小
  fontFamily: string; // 字体族
  lineHeight: number; // 行高
  backgroundColor: string; // 背景色
  textColor: string; // 文字颜色
}

方法

  • render(text: string): void - 渲染文本内容
  • nextPage(): void - 切换到下一页
  • prevPage(): void - 切换到上一页
  • downloadCurrentPage(): void - 下载当前页面为图片
  • downloadAll(): void - 下载所有页面为图片
  • unmount(): void - 清理资源

License

MIT