Merge branch 'main' of http://47.107.152.87:3000/dyf/APP
This commit is contained in:
@ -27,6 +27,16 @@
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color: {
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color: {
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type: String,
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type: String,
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default: "#000000"
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default: "#000000"
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},
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// 二值化阈值(0~1),越大越细;默认偏清晰
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threshold: {
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type: Number,
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default: 0.45
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},
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// 是否启用轻度笔画修复(3x3 膨胀);默认关闭以避免变粗
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sharpen: {
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type: Boolean,
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default: false
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}
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}
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},
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},
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data() {
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data() {
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@ -48,6 +58,16 @@
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this.ctx = uni.createCanvasContext('reusableCanvas', this);
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this.ctx = uni.createCanvasContext('reusableCanvas', this);
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},
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},
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methods: {
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methods: {
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/**
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* 外部可调用:复位画布为纯背景并立即提交
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*/
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async resetCanvas() {
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if (!this.ctx) return;
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this.clearCanvas();
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await new Promise((resolve) => {
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this.ctx.draw(true, () => setTimeout(resolve, 30));
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});
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},
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/**
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/**
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* 估算单行文本所需的Canvas宽度
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* 估算单行文本所需的Canvas宽度
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*/
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*/
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@ -69,6 +89,8 @@
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* 复用单个Canvas处理所有文本行
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* 复用单个Canvas处理所有文本行
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*/
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*/
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async drawAndGetPixels() {
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async drawAndGetPixels() {
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// 发送前:确保画布处于干净背景态
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await this.resetCanvas();
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// 超采样比例(提高分辨率再降采样,减少模糊)
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// 超采样比例(提高分辨率再降采样,减少模糊)
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const SCALE = 3;
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const SCALE = 3;
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const PADDING_X = 1 * SCALE; // 左侧预留像素,避免首字裁剪
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const PADDING_X = 1 * SCALE; // 左侧预留像素,避免首字裁剪
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@ -96,21 +118,28 @@
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}
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}
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let convertCharToMatrix = (drawResult, item) => {
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let convertCharToMatrix = (drawResult, item) => {
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// 设备端使用13x13点阵渲染
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// 设备端使用13x13点阵渲染(保持输出13列×13行),但只在内部采样12×12,保留右侧与底部1像素缓冲
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const charWidth = 13;
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const charWidth = 13;
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const charHeight = 13;
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const charHeight = 13;
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const effectiveWidth = 12; // 仅采样前12列
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const effectiveHeight = 12; // 仅采样前12行
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const { pixelData, width, height } = drawResult;
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const { pixelData, width, height } = drawResult;
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// 将高分辨率像素降采样为13x13的布尔矩阵
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// 将高分辨率像素降采样为13x13的布尔矩阵
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const target = new Array(charWidth * charHeight).fill(0);
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const target = new Array(charWidth * charHeight).fill(0);
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const threshold = 0.5; // 每个小块中超过50%亮色(文字)判为1
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const threshold = Math.max(0.2, Math.min(0.8, this.threshold || 0.45));
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// 确保采样区域严格对齐,从PADDING_X开始,只采样13列
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// 确保采样区域严格对齐,从PADDING_X开始,只采样12列(右侧预留1px),12行(底部预留1px)
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// 字符实际绘制区域:从PADDING_X开始,宽度为13*SCALE
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// 字符实际绘制区域:从PADDING_X开始,宽度为12*SCALE
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const charStartX = PADDING_X;
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const charStartX = PADDING_X;
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const charEndX = PADDING_X + charWidth * SCALE;
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const charEndX = PADDING_X + effectiveWidth * SCALE; // 仅采样到第12列
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for (let y = 0; y < charHeight; y++) {
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for (let y = 0; y < charHeight; y++) {
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for (let x = 0; x < charWidth; x++) {
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for (let x = 0; x < charWidth; x++) {
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// 超出有效采样区域(第13列或第13行)直接置0,作为缓冲
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if (x >= effectiveWidth || y >= effectiveHeight) {
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target[y * charWidth + x] = 0;
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continue;
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}
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let onCount = 0;
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let onCount = 0;
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let total = 0;
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let total = 0;
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// 采样区域:字符从PADDING_X开始绘制,每列宽度为SCALE
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// 采样区域:字符从PADDING_X开始绘制,每列宽度为SCALE
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@ -151,6 +180,32 @@
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}
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}
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}
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}
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// 轻度笔画修复:可选 3x3 膨胀(启用时阈值更严格,避免变粗)
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if (this.sharpen) {
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const dilated = target.slice();
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for (let y = 0; y < effectiveHeight; y++) {
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for (let x = 0; x < effectiveWidth; x++) {
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const idx = y * charWidth + x;
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if (target[idx] === 1) continue;
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let neighbors = 0;
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for (let dy = -1; dy <= 1; dy++) {
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for (let dx = -1; dx <= 1; dx++) {
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if (dx === 0 && dy === 0) continue;
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const nx = x + dx;
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const ny = y + dy;
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if (nx < 0 || ny < 0 || nx >= effectiveWidth || ny >= effectiveHeight) continue;
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if (target[ny * charWidth + nx] === 1) neighbors++;
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}
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}
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// 使用更严格的邻居门限,避免整体变粗
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if (neighbors >= 5) {
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dilated[idx] = 1;
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}
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}
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}
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for (let i = 0; i < target.length; i++) target[i] = dilated[i];
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}
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const lowBytes = new Array(charWidth).fill(0);
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const lowBytes = new Array(charWidth).fill(0);
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const highBytes = new Array(charWidth).fill(0);
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const highBytes = new Array(charWidth).fill(0);
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// 按列打包,每列13行分成上下两字节:低字节0-7行(8行),高字节8-12行(5行)
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// 按列打包,每列13行分成上下两字节:低字节0-7行(8行),高字节8-12行(5行)
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@ -198,30 +253,41 @@
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ctx.fillText(textLine, charX, charY);
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ctx.fillText(textLine, charX, charY);
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// 5. 异步绘制并获取像素数据(串行处理避免冲突)
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// 5. 异步绘制并获取像素数据(串行处理避免冲突)
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await new Promise((resolve, reject) => {
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const grabPixels = () => new Promise((resolve, reject) => {
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ctx.draw(false, () => {
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// 立即绘制并给一点缓冲时间,避免取像素过早
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uni.canvasGetImageData({
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ctx.draw(true, () => {
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canvasId: 'reusableCanvas',
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setTimeout(() => {
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x: 0,
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uni.canvasGetImageData({
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y: 0,
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canvasId: 'reusableCanvas',
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width: this.currentCanvasWidth,
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x: 0,
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height: this.currentCanvasHeight,
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y: 0,
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success: res => {
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result = {
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line: textLine,
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pixelData: res.data,
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width: this.currentCanvasWidth,
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width: this.currentCanvasWidth,
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height: this.currentCanvasHeight
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height: this.currentCanvasHeight,
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};
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success: res => {
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resolve();
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result = {
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},
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line: textLine,
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fail: err => {
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pixelData: res.data,
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// console.error(`处理第${i+1}行失败:`, err);
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width: this.currentCanvasWidth,
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reject(err)
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height: this.currentCanvasHeight
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}
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};
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});
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resolve();
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},
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fail: err => reject(err)
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});
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}, 70);
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});
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});
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});
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});
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await grabPixels();
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// 一次性校验:若像素全黑或明显异常,重绘重取一次
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let nonZero = false;
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for (let i = 0; i < result.pixelData.length; i += 4) {
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if (result.pixelData[i] || result.pixelData[i+1] || result.pixelData[i+2]) { nonZero = true; break; }
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}
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if (!nonZero) {
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await new Promise(r => setTimeout(r, 50));
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await grabPixels();
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}
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return result;
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return result;
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}
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}
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@ -239,11 +305,17 @@
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// 调试:打印每个字符的点阵数据
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// 调试:打印每个字符的点阵数据
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console.log(`[点阵生成] 字符"${char}" 点阵数据:`, matrix.map(b => '0x' + b.toString(16).padStart(2, '0')).join(' '));
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console.log(`[点阵生成] 字符"${char}" 点阵数据:`, matrix.map(b => '0x' + b.toString(16).padStart(2, '0')).join(' '));
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linePixls.push(matrix);
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linePixls.push(matrix);
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// 在字符间增加轻微延时,避免相邻提取竞争(尤其是末字符)
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await new Promise(r => setTimeout(r, 20));
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}
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}
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// console.log("hexs=", linePixls.join(","));
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// console.log("hexs=", linePixls.join(","));
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arr.push(linePixls);
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arr.push(linePixls);
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// 每行结束再等一会,提高末字符稳定性
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await new Promise(r => setTimeout(r, 40));
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}
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}
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// 发送后:再次清空画布,避免残留影响下一次
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await this.resetCanvas();
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return arr;
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return arr;
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}
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}
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}
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}
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