600 lines
22 KiB
TypeScript
600 lines
22 KiB
TypeScript
import Taro from '@tarojs/taro'
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import { OSS_BASE } from "@/config/api";
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export interface ShareCardData {
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userAvatar: string
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userNickname: string
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gameType: string
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skillLevel: string
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gameDate: string
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gameTime: string
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venueName: string
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venueImages: string[]
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}
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export interface GenerateShareImageOptions {
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canvasId?: string
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width?: number
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height?: number
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dpr?: number
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}
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// 设计稿尺寸
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const designWidth = 500
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const designHeight = 400
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// 获取屏幕宽度，如果没有传入width则使用屏幕宽度
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const windowWidth = Taro.getSystemInfoSync().windowWidth
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// 获取 DPR - 使用系统像素比确保高清显示
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// const systemDpr = Taro.getSystemInfoSync().pixelRatio
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const dpr = 1
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// Math.min(systemDpr, 3) // 限制最大dpr为3，避免过度放大
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// 2. 计算缩放比例（设备宽度 / 设计稿宽度）
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const scale = windowWidth / designWidth
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// 3. 计算实际显示尺寸（按比例缩放）
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const canvasWidth = designWidth * scale
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const canvasHeight = designHeight * scale
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// 模块级运行时：存放公共对象/参数，避免层层传参
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const runtime: {
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offscreen?: any
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} = {}
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// 2D Canvas 字体设置
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const setFont2D = (ctx: any, fontSize: number, family?: string, weight?: string) => {
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const fam = family || 'Noto Sans SC'
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const wt = weight || '500'
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ctx.font = `${wt} ${fontSize}px "${fam}"`
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}
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// 绘制加粗文字（单行，支持可选描边式加粗）
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const drawBoldText = (ctx: any, text: string, x: number, y: number, fontSize: number, color: string, fontFamily: string = 'Noto Sans SC', fontWeight: string = '500') => {
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setFont2D(ctx, fontSize, fontFamily, fontWeight)
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ctx.fillStyle = color
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ctx.textAlign = 'left'
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ctx.textBaseline = 'top'
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ctx.fillText(text, x, y)
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// if (isBold) {
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// ctx.fillText(text, x + 1, y)
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// ctx.fillText(text, x, y + 1)
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// ctx.fillText(text, x + 1, y + 1)
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// }
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}
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// 绘制圆角矩形函数
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const drawRoundedRect = (ctx: any, x: number, y: number, width: number, height: number, radius: number) => {
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ctx.beginPath();
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ctx.moveTo(x + radius, y);
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ctx.lineTo(x + width - radius, y);
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ctx.arcTo(x + width, y, x + width, y + radius, radius);
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ctx.lineTo(x + width, y + height - radius);
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ctx.arcTo(x + width, y + height, x + width - radius, y + height, radius);
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ctx.lineTo(x + radius, y + height);
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ctx.arcTo(x, y + height, x, y + height - radius, radius);
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ctx.lineTo(x, y + radius);
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ctx.arcTo(x, y, x + radius, y, radius);
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ctx.closePath();
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ctx.fill();
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}
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// 绘制标签函数（通用）
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const drawLabel = (ctx: any, x: number, y: number, width: number, height: number, radius: number, text: string, fontSize: number, textColor: string = '#000000', bgColor: string = '#FFFFFF', borderColor: string = '#E0E0E0') => {
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// 绘制背景
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ctx.fillStyle = bgColor
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drawRoundedRect(ctx, x, y, width, height, radius)
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// 绘制边框
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ctx.strokeStyle = borderColor
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ctx.lineWidth = 1 * dpr
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ctx.stroke()
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// 绘制文字
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const textCenterX = x + width / 2
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const textCenterY = y + height / 2
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ctx.fillStyle = textColor
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ctx.textAlign = 'center'
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ctx.textBaseline = 'middle'
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setFont2D(ctx, fontSize)
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ctx.save()
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ctx.translate(textCenterX, textCenterY)
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ctx.fillText(text, 0, 0)
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ctx.restore()
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}
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// 工具函数 - OffscreenCanvas 下加载图片（使用 offscreen.createImage）
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const loadImage = (src: string): Promise<any> => {
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return new Promise((resolve, reject) => {
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try {
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const off = runtime.offscreen
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if (!off || typeof off.createImage !== 'function') {
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throw new Error('OffscreenCanvas 未初始化或不支持 createImage')
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}
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const img = off.createImage()
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img.onload = () => resolve(img)
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img.onerror = reject
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img.src = src
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} catch (e) {
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reject(e)
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}
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})
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}
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// 绘制SVG路径到Canvas
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const drawSVGPathToCanvas = (ctx: any) => {
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// 设置绘制样式
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ctx.strokeStyle = '#00E5AD';
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ctx.lineWidth = scale * 3 * dpr;
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ctx.lineCap = 'round';
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ctx.lineJoin = 'round';
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ctx.save();
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// 移动到指定位置并缩放
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ctx.translate(scale * 200 * dpr, scale * 90 * dpr);
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const scaleValue = 0.8
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ctx.scale(scaleValue, scaleValue);
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// 手动绘制SVG路径（微信小程序不支持Path2D）
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ctx.beginPath();
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ctx.moveTo(109.808, 6.10642);
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ctx.bezierCurveTo(89.5111, -2.79359, 33.4629, 3.77737, 7.49927, 30.2355);
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ctx.bezierCurveTo(4.78286, 33.0044, 1.93351, 36.3827, 1.66282, 41.2355);
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ctx.bezierCurveTo(1.21704, 49.1959, 7.56651, 55.1359, 13.1231, 57.7309);
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ctx.bezierCurveTo(20.6373, 61.24, 28.4568, 62.6334, 36.2033, 63.2984);
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ctx.bezierCurveTo(58.8813, 65.247, 81.6582, 60.9714, 101.719, 48.424);
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ctx.bezierCurveTo(105.278, 46.1993, 108.823, 43.6365, 111.378, 39.5712);
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ctx.bezierCurveTo(113.934, 35.5058, 115.361, 29.6397, 114.14, 24.1205);
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ctx.bezierCurveTo(112.685, 17.5296, 107.961, 13.1328, 103.328, 10.8187);
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ctx.bezierCurveTo(94.2761, 6.29607, 84.6677, 7.3453, 75.41, 8.45251);
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// 绘制路径
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ctx.stroke();
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// 恢复上下文状态
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ctx.restore();
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}
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// 绘制右上角场地图片
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const drawVenueImages = async (ctx: any, venueImageConfig: any) => {
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// 如果只有一张图
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const playerImgX = venueImageConfig.venueImgX
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const playerImgY = venueImageConfig.venueImgY
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const playerImgSize = venueImageConfig.venueImgSize
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const borderRadius = venueImageConfig.borderRadius
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const padding = venueImageConfig.padding
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const rotation = venueImageConfig.rotation // 旋转-8度
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const venueImage = venueImageConfig.venueImage
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try {
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const playerImgPath = await loadImage(venueImage)
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ctx.save()
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// 移动到旋转中心点
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const centerX = playerImgX + playerImgSize / 2
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const centerY = playerImgY + playerImgSize / 2
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ctx.translate(centerX, centerY)
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// 旋转-8度
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ctx.rotate((rotation * Math.PI) / 180)
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// 1. 先绘制白色圆角矩形背景
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ctx.fillStyle = '#FFFFFF'
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ctx.beginPath()
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// 使用更精确的圆角矩形绘制
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const rectX = -playerImgSize / 2
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const rectY = -playerImgSize / 2
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const rectWidth = playerImgSize
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const rectHeight = playerImgSize
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// 从左上角开始，顺时针绘制
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// 左上角圆角
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ctx.moveTo(rectX + borderRadius, rectY)
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ctx.quadraticCurveTo(rectX, rectY, rectX, rectY + borderRadius)
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// 左边
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ctx.lineTo(rectX, rectY + rectHeight - borderRadius)
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// 左下角圆角
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ctx.quadraticCurveTo(rectX, rectY + rectHeight, rectX + borderRadius, rectY + rectHeight)
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// 下边
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ctx.lineTo(rectX + rectWidth - borderRadius, rectY + rectHeight)
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// 右下角圆角
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ctx.quadraticCurveTo(rectX + rectWidth, rectY + rectHeight, rectX + rectWidth, rectY + rectHeight - borderRadius)
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// 右边
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ctx.lineTo(rectX + rectWidth, rectY + borderRadius)
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// 右上角圆角
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ctx.quadraticCurveTo(rectX + rectWidth, rectY, rectX + rectWidth - borderRadius, rectY)
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// 上边
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ctx.lineTo(rectX + borderRadius, rectY)
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ctx.closePath()
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ctx.fill()
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// 2. 绘制图片（带4px内边距）
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const imgX = -playerImgSize / 2 + padding
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const imgY = -playerImgSize / 2 + padding
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const imgSize = playerImgSize - padding * 2
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// 设置圆角裁剪区域
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ctx.beginPath()
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const imgRadius = borderRadius - padding
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// 从左上角开始，顺时针绘制
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// 左上角圆角
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ctx.moveTo(imgX + imgRadius, imgY)
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ctx.quadraticCurveTo(imgX, imgY, imgX, imgY + imgRadius)
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// 左边
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ctx.lineTo(imgX, imgY + imgSize - imgRadius)
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// 左下角圆角
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ctx.quadraticCurveTo(imgX, imgY + imgSize, imgX + imgRadius, imgY + imgSize)
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// 下边
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ctx.lineTo(imgX + imgSize - imgRadius, imgY + imgSize)
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// 右下角圆角
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ctx.quadraticCurveTo(imgX + imgSize, imgY + imgSize, imgX + imgSize, imgY + imgSize - imgRadius)
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// 右边
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ctx.lineTo(imgX + imgSize, imgY + imgRadius)
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// 右上角圆角
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ctx.quadraticCurveTo(imgX + imgSize, imgY, imgX + imgSize - imgRadius, imgY)
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// 上边
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ctx.lineTo(imgX + imgRadius, imgY)
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ctx.closePath()
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ctx.clip()
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// 绘制图片
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ctx.drawImage(playerImgPath, imgX, imgY, imgSize, imgSize)
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ctx.restore()
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} catch (error) {
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// 如果图片加载失败，绘制占位符
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ctx.save()
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const centerX = playerImgX + playerImgSize / 2
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const centerY = playerImgY + playerImgSize / 2
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ctx.translate(centerX, centerY)
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ctx.rotate((rotation * Math.PI) / 180)
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// 绘制白色圆角矩形背景
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ctx.fillStyle = '#FFFFFF'
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ctx.beginPath()
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const rectX = -playerImgSize / 2
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const rectY = -playerImgSize / 2
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const rectWidth = playerImgSize
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const rectHeight = playerImgSize
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// 从左上角开始，顺时针绘制
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// 左上角圆角
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ctx.moveTo(rectX + borderRadius, rectY)
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ctx.quadraticCurveTo(rectX, rectY, rectX, rectY + borderRadius)
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// 左边
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ctx.lineTo(rectX, rectY + rectHeight - borderRadius)
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// 左下角圆角
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ctx.quadraticCurveTo(rectX, rectY + rectHeight, rectX + borderRadius, rectY + rectHeight)
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// 下边
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ctx.lineTo(rectX + rectWidth - borderRadius, rectY + rectHeight)
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// 右下角圆角
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ctx.quadraticCurveTo(rectX + rectWidth, rectY + rectHeight, rectX + rectWidth, rectY + rectHeight - borderRadius)
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// 右边
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ctx.lineTo(rectX + rectWidth, rectY + borderRadius)
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// 右上角圆角
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ctx.quadraticCurveTo(rectX + rectWidth, rectY, rectX + rectWidth - borderRadius, rectY)
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// 上边
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ctx.lineTo(rectX + borderRadius, rectY)
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ctx.closePath()
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ctx.fill()
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// 绘制灰色占位符（带内边距）
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const imgX = -playerImgSize / 2 + padding
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const imgY = -playerImgSize / 2 + padding
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const imgSize = playerImgSize - padding * 2
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ctx.fillStyle = '#E0E0E0'
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ctx.beginPath()
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const imgRadius = borderRadius - padding
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// 从左上角开始，顺时针绘制
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// 左上角圆角
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ctx.moveTo(imgX + imgRadius, imgY)
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ctx.quadraticCurveTo(imgX, imgY, imgX, imgY + imgRadius)
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// 左边
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ctx.lineTo(imgX, imgY + imgSize - imgRadius)
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// 左下角圆角
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ctx.quadraticCurveTo(imgX, imgY + imgSize, imgX + imgRadius, imgY + imgSize)
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// 下边
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ctx.lineTo(imgX + imgSize - imgRadius, imgY + imgSize)
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// 右下角圆角
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ctx.quadraticCurveTo(imgX + imgSize, imgY + imgSize, imgX + imgSize, imgY + imgSize - imgRadius)
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// 右边
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ctx.lineTo(imgX + imgSize, imgY + imgRadius)
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// 右上角圆角
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ctx.quadraticCurveTo(imgX + imgSize, imgY, imgX + imgSize - imgRadius, imgY)
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// 上边
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ctx.lineTo(imgX + imgRadius, imgY)
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ctx.closePath()
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ctx.fill()
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ctx.restore()
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console.log('球员图片占位符绘制完成')
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}
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}
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// 绘制分享卡片
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const drawShareCard = async (ctx: any, data: ShareCardData, offscreen: any): Promise<string> => {
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return new Promise(async (resolve, reject) => {
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console.log('开始绘制分享卡片...')
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try {
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// 设置Canvas的实际尺寸（使用dpr确保高清显示）
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const canvasWidthPx = canvasWidth * dpr
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const canvasHeightPx = canvasHeight * dpr
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// 清空画布
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ctx.clearRect(0, 0, canvasWidthPx, canvasHeightPx)
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console.log('画布已清空')
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// 如果dpr大于2，进行缩放处理以避免内容过大
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if (dpr > 2) {
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const scale = 2 / dpr
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ctx.scale(scale, scale)
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console.log('应用缩放:', scale)
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}
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// 绘制背景 - 渐变色 已完成
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const gradient = ctx.createLinearGradient(0, 0, 0, canvasHeightPx)
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gradient.addColorStop(0, '#BFFFEF')
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gradient.addColorStop(1, '#F2FFFC')
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ctx.fillStyle = gradient
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ctx.fillRect(0, 0, canvasWidthPx, canvasHeightPx)
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console.log('背景绘制完成')
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// 绘制背景条纹 已完成
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ctx.strokeStyle = 'rgba(0, 0, 0, 0.03)'
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ctx.lineWidth = 2
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for (let i = 0; i < canvasWidthPx; i += 4) {
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ctx.beginPath()
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ctx.moveTo(i, 0)
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ctx.lineTo(i, canvasHeightPx)
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ctx.stroke()
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}
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// 绘制用户头像（左上角） 已完成
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const avatarSize = scale * 32 * dpr // 32px * dpr
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const avatarX = scale * 35 * dpr // 距离左侧35px
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const avatarY = scale * 35 * dpr // 距离顶部35px
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try {
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const avatarPath = await loadImage(data.userAvatar)
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// 微信小程序中绘制圆形头像需要特殊处理
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ctx.save()
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ctx.beginPath()
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ctx.arc(avatarX + avatarSize / 2, avatarY + avatarSize / 2, avatarSize / 2, 0, 2 * Math.PI)
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ctx.clip()
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ctx.drawImage(avatarPath, avatarX, avatarY, avatarSize, avatarSize)
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ctx.restore()
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} catch (error) {
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// 如果头像加载失败，绘制默认头像
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ctx.setFillStyle('#CCCCCC')
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ctx.beginPath()
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ctx.arc(avatarX + avatarSize / 2, avatarY + avatarSize / 2, avatarSize / 2, 0, 2 * Math.PI)
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ctx.fill()
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}
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// 绘制用户昵称 已完成
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const nicknameX = avatarX + avatarSize + 8 * dpr // 距离头像8px
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const nicknameY = avatarY + (avatarSize - 18 * dpr) / 2 // 与头像水平居中对齐
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const nicknameFontSize = scale * 18 * dpr
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drawBoldText(ctx, data.userNickname, nicknameX, nicknameY, nicknameFontSize, '#000000', 'Noto Sans SC', '900')
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// 绘制"邀你加入球局"文案
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const inviteX = scale * 35 * dpr // 距离画布左侧35px
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const inviteY = scale * 100 * dpr // 距离画布顶部79px
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const inviteFontSize = scale * 44 * dpr
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// 绘制"邀你加入"
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drawBoldText(ctx, '邀你加入', inviteX, inviteY, inviteFontSize, '#000000', 'Noto Sans SC', '900')
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// 绘制"球局"特殊样式
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const qiuJuX = inviteX + ctx.measureText('邀你加入').width + 4 * dpr
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const qiuJuFontSize = scale * 44 * dpr
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drawBoldText(ctx, '球局', qiuJuX, inviteY, qiuJuFontSize, '#00E5AD', 'Noto Sans SC', '900')
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// 测试绘制网络图片
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drawSVGPathToCanvas(ctx)
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// 绘制球员图片（右上角）已完成
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let venueBaseConfig = {
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venueImgX: scale * 340 * dpr,
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venueImgY: scale * 35 * dpr,
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rotation: scale * -8, // 旋转-8度
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venueImgSize: scale * 124 * dpr,
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borderRadius: scale * 24 * dpr,
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padding: scale * 4 * dpr,
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venueImage: data.venueImages?.[0]
|
||
}
|
||
|
||
if (data.venueImages.length > 1) {
|
||
// 后面的图
|
||
const venueBackConfig = {
|
||
...venueBaseConfig,
|
||
venueImage: data.venueImages?.[1],
|
||
venueImgX: scale * 400 * dpr,
|
||
venueImgY: scale * 35 * dpr,
|
||
rotation: scale * -10, // 旋转-10度
|
||
}
|
||
await drawVenueImages(ctx, venueBackConfig)
|
||
// 前面的图
|
||
const venueFrontConfig = {
|
||
...venueBaseConfig,
|
||
venueImage: data.venueImages?.[0],
|
||
rotation: scale * 8, // 旋转-8度
|
||
}
|
||
await drawVenueImages(ctx, venueFrontConfig)
|
||
} else {
|
||
await drawVenueImages(ctx, venueBaseConfig)
|
||
}
|
||
|
||
// 绘制球局信息区域
|
||
const infoStartY = scale * 192
|
||
const infoSpacing = scale * 64
|
||
|
||
// 球局类型和技能等级
|
||
const gameInfoY = infoStartY
|
||
// 图标大小
|
||
const iconSize = scale * 48
|
||
// 图标距离左侧距离
|
||
const iconX = scale * 35
|
||
// 文本距离左侧距离
|
||
const textX = iconX + iconSize + 20
|
||
|
||
// 绘制网球图标
|
||
const tennisBallPath = await loadImage(`${OSS_BASE}/front/ball/images/b3eaf45e-ef28-4e45-9195-823b832e0451.jpg`)
|
||
ctx.drawImage(tennisBallPath, iconX, gameInfoY, iconSize, iconSize)
|
||
|
||
// 绘制"单打"标签
|
||
const danDaX = scale * 100
|
||
const danDaY = scale * 196
|
||
const danDaHeight = scale * 40 * dpr
|
||
const danDaRadius = scale * 20 * dpr
|
||
const danDaFontSize = scale * 22 * dpr
|
||
// 根据内容动态计算标签宽度（左右内边距）
|
||
const danDaPaddingX = scale * 16 * dpr
|
||
setFont2D(ctx, danDaFontSize)
|
||
const danDaTextWidth = ctx.measureText(data.gameType).width
|
||
const danDaWidth = danDaTextWidth + danDaPaddingX * 2
|
||
|
||
drawLabel(ctx, danDaX, danDaY, danDaWidth, danDaHeight, danDaRadius, data.gameType, danDaFontSize)
|
||
|
||
// 绘制技能等级标签（基于“单打”标签实际宽度后移）
|
||
const labelGap = scale * 16 // 两个标签之间的间距（不乘 dpr，保持视觉间距）
|
||
const skillX = danDaX + danDaWidth + labelGap
|
||
const skillY = scale * 196
|
||
const skillHeight = scale * 40 * dpr
|
||
const skillRadius = scale * 20 * dpr
|
||
const skillFontSize = scale * 22 * dpr
|
||
// 根据内容动态计算技能标签宽度
|
||
const skillPaddingX = scale * 20 * dpr
|
||
setFont2D(ctx, skillFontSize)
|
||
const skillTextWidth = ctx.measureText(data.skillLevel).width
|
||
const skillWidth = skillTextWidth + skillPaddingX * 2
|
||
|
||
drawLabel(ctx, skillX, skillY, skillWidth, skillHeight, skillRadius, data.skillLevel, skillFontSize)
|
||
|
||
// 绘制日期时间
|
||
const dateX = danDaX
|
||
const timeInfoY = infoStartY + infoSpacing
|
||
const timeInfoFontSize = scale * 24 * dpr
|
||
const calendarPath = await loadImage(`${OSS_BASE}/front/ball/images/ea792a5d-b105-4c95-bfc4-8af558f2b33b.jpg`)
|
||
ctx.drawImage(calendarPath, iconX, timeInfoY, iconSize, iconSize)
|
||
|
||
// 绘制日期（绿色，非描边粗体）
|
||
drawBoldText(ctx, data.gameDate, dateX, timeInfoY + 8, timeInfoFontSize, '#00E5AD')
|
||
|
||
// 绘制时间（黑色）
|
||
const timeX = textX + ctx.measureText(data.gameDate).width + 10 * dpr
|
||
drawBoldText(ctx, data.gameTime, timeX, timeInfoY + 8, timeInfoFontSize, '#000000')
|
||
|
||
// 绘制地点
|
||
const locationInfoY = infoStartY + infoSpacing * 2
|
||
const locationFontSize = scale * 22 * dpr
|
||
const locationPath = await loadImage(`${OSS_BASE}/front/ball/images/adc9a167-2ea9-4e3b-b963-6a894a1fd91b.jpg`)
|
||
ctx.drawImage(locationPath, iconX, locationInfoY, iconSize, iconSize)
|
||
drawBoldText(ctx, data.venueName, danDaX, locationInfoY + 10, locationFontSize, '#000000')
|
||
try {
|
||
const wxAny: any = (typeof (globalThis as any) !== 'undefined' && (globalThis as any).wx) ? (globalThis as any).wx : null
|
||
if (wxAny && typeof wxAny.canvasToTempFilePath === 'function') {
|
||
wxAny.canvasToTempFilePath({
|
||
canvas: offscreen,
|
||
fileType: 'png',
|
||
quality: 1,
|
||
success: (res: any) => {
|
||
console.log('===res666', res)
|
||
resolve(res.tempFilePath)
|
||
},
|
||
fail: reject
|
||
})
|
||
return
|
||
}
|
||
} catch { }
|
||
reject(new Error('无法导出图片（OffscreenCanvas 转文件失败）'))
|
||
console.log('Canvas绘制命令已发送')
|
||
|
||
} catch (error) {
|
||
console.warn('绘制分享卡片失败:', error)
|
||
Taro.showToast({
|
||
title: '生成分享卡片失败',
|
||
icon: 'none'
|
||
})
|
||
reject(error)
|
||
}
|
||
})
|
||
}
|
||
|
||
let isDrawing = false
|
||
export async function generateShareImage(data: ShareCardData): Promise<string> {
|
||
if (isDrawing) {
|
||
return ''
|
||
}
|
||
// 如果传入了 canvasId，则优先使用页面 Canvas 进行绘制（可见且稳定）
|
||
const anyGlobal: any = Taro as any
|
||
const weappGlobal: any = (typeof (globalThis as any) !== 'undefined' && (globalThis as any).wx) ? (globalThis as any).wx : null
|
||
const createOffscreen = anyGlobal?.createOffscreenCanvas || weappGlobal?.createOffscreenCanvas || (Taro as any)?.createOffscreenCanvas
|
||
if (!createOffscreen) {
|
||
throw new Error('OffscreenCanvas 不可用')
|
||
}
|
||
|
||
// 设置Canvas的实际尺寸（使用dpr确保高清显示）
|
||
const canvasWidthPx = canvasWidth * dpr
|
||
const canvasHeightPx = canvasHeight * dpr
|
||
|
||
|
||
// @ts-ignore - 小程序下 createOffscreenCanvas 接口
|
||
const offscreen = createOffscreen({ type: '2d', width: canvasWidthPx, height: canvasHeightPx })
|
||
// @ts-ignore
|
||
let ctx: CanvasRenderingContext2D = offscreen.getContext('2d')
|
||
// 记录到 runtime（供 loadImage 使用）
|
||
runtime.offscreen = offscreen
|
||
isDrawing = true
|
||
|
||
const imagePath = await drawShareCard(ctx, data, offscreen)
|
||
isDrawing = false
|
||
return imagePath
|
||
}
|
||
|
||
export default generateShareImage
|
||
|
||
|