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multidrawtool2.html
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<!DOCTYPE html>
<html lang="zh-tw">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>批量編輯圖片 - By Aidec</title>
<style>
/* .preview-canvas {
border: 1px solid #000;
position: absolute;
pointer-events: none;
z-index: 999;
} */
/* .work-canvas {
position: relative;
float: left;
} */
body {
overflow: hidden;
}
#canvas-draw-container {
overflow: auto;
max-height: 86vh;
}
#canvas-container {
position: relative;
}
.brush-canvas {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.6.0/jszip.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.5/FileSaver.min.js"></script>
</head>
<body>
<input type="file" id="file-input" multiple accept=".jpg, .jpeg, .png">
<button id="reset">重置所有繪製內容</button>
<button id="brush">筆刷模式</button>
<button id="eraser">橡皮擦模式</button>
<button id="download">匯出保存</button>
<select id="brush-style">
<option value="round">圓形</option>
<option value="square">正方形</option>
<option value="butt">矩形</option>
<option value="ellipse" style="display:none;">橢圓</option>
</select>
<div style="
display: inline-block;
">
<input type="color" id="color-picker" value="#f9c2a6">
<input type="range" id="brush-size" min="1" step="1" max="40" value="5">
</div>
<div id="canvas-container">
<div id="canvas-link-container"></div>
<div id="canvas-draw-container"></div>
</div>
</body>
<script>
const fileInput = document.getElementById('file-input');
const canvasContainer = document.getElementById('canvas-container');
const canvasLinkContainer = document.getElementById('canvas-link-container');
const canvasDrawContainer = document.getElementById('canvas-draw-container');
//const maxWidth = 500;
//const maxHeight = 500;
let isDrawing = false;
let canvasCounter = 0;
let imageObj, initialImageObj;
const undoButton = document.getElementById('undo');
const downloadButton = document.getElementById('download');
//let zip;
const btncontainer = document.createElement('div');
fileInput.addEventListener('change', () => {
const files = fileInput.files;
for (let i = 0; i < files.length; i++) {
const file = files[i];
const reader = new FileReader();
// 獲取原始檔名
const originalFileName = file.name;
// 2. 为每个图像创建一个按钮
const imageButton = document.createElement('button');
imageButton.textContent = `顯示圖片${i + 1}`;
btncontainer.appendChild(imageButton);
canvasLinkContainer.appendChild(btncontainer);
reader.addEventListener('load', () => {
const img = new Image();
img.src = reader.result;
img.onload = () => {
initialImageObj = img;
let width = img.width;
let height = img.height;
// if (width > maxWidth) {
// height *= maxWidth / width;
// width = maxWidth;
// }
// if (height > maxHeight) {
// width *= maxHeight / height;
// height = maxHeight;
// }
//底圖canvas
const backgroundCanvas = document.createElement('canvas');
//筆刷canvas
const brushCanvas = document.createElement('canvas');
//
backgroundCanvas.width = width;
backgroundCanvas.height = height;
backgroundCanvas.id = `canvas-${canvasCounter}`;
// 添加原始檔名
backgroundCanvas.setAttribute('data-filename', originalFileName);
//
brushCanvas.width = width;
brushCanvas.height = height;
brushCanvas.id = `brush-canvas-${canvasCounter}`;
brushCanvas.className = 'brush-canvas';
//產生縮放畫布input
const zoomDiv = document.createElement('div');
const zoomRange = document.createElement('input');
zoomRange.setAttribute('type', 'range');
zoomRange.setAttribute('min', '1');
zoomRange.setAttribute('max', '3');
zoomRange.setAttribute('step', '0.01');
zoomRange.setAttribute('value', '1');
// 預設顯示第一張圖的縮放畫布
if (i !== 0) {
zoomRange.style.display = 'none';
}
zoomDiv.appendChild(zoomRange);
//按鈕點擊事件
imageButton.addEventListener('click', () => {
// 4.顯示當前圖片，隱藏其他圖片
const allContainers = canvasDrawContainer.querySelectorAll('.subcontainer');
//所有的range
const allZoomRanges = canvasContainer.querySelectorAll('input[type="range"]');
for (const containerTmp of allContainers) {
containerTmp.style.display = 'none';
}
container.style.display = 'inline-block';
//隱藏
for (const otherZoomRange of allZoomRanges) {
otherZoomRange.style.display = 'none';
}
//顯示目前的
container.style.transformOrigin = 'left top'; // 設定縮放中心為左上角
zoomRange.style.display = 'inline-block';
});
zoomRange.addEventListener('input', (e) => {
const scale = e.target.value;
container.style.transform = `scale(${scale})`;
});
// const canvas = document.createElement('canvas');
// canvas.width = width;
// canvas.height = height;
// canvas.id = `canvas-${canvasCounter}`;
//增加canvas計數器
canvasCounter++;
//新增canvas容器
const container = document.createElement('div');
container.style.position = "relative";
container.style.display = "inline-block";
container.className = 'subcontainer';
container.style.transformOrigin = 'left top'; // 設定縮放中心為左上角
// 預設顯示第一張圖
if (i !== 0) {
container.style.display = 'none';
}
//container.appendChild(canvas); //
canvasLinkContainer.appendChild(zoomDiv); //加入縮放畫布input
container.appendChild(backgroundCanvas); //加入底圖canvas
container.appendChild(brushCanvas); //加入筆刷canvas
canvasDrawContainer.appendChild(container); //加入主canvas容器
// 新增筆刷預覽
const brushPreview = document.createElement('div');
brushPreview.style.width = '10px';
brushPreview.style.height = '10px';
brushPreview.style.borderRadius = '50%';
brushPreview.style.backgroundColor = 'black';
brushPreview.style.position = 'absolute';
brushPreview.style.zIndex = '1000';
brushPreview.style.pointerEvents = 'none';
container.appendChild(brushPreview);
//
const backgroundCtx = backgroundCanvas.getContext('2d');
const brushCtx = brushCanvas.getContext('2d');
backgroundCtx.drawImage(img, 0, 0, width, height);
brushCanvas.style.zIndex = '2'; //筆刷canvas在上層
//進入筆刷canvas時顯示筆刷預覽
brushCanvas.addEventListener('mouseenter', (e) => {
const brushSize = document.getElementById('brush-size').value;
const brushStyle = document.getElementById('brush-style').value;
const color = document.getElementById('color-picker').value;
brushPreview.style.width = `${brushSize}px`;
brushPreview.style.height = `${brushSize}px`;
brushPreview.style.backgroundColor = color;
if (brushStyle === 'round') {
brushPreview.style.borderRadius = '50%';
} else if (brushStyle === 'square') {
brushPreview.style.borderRadius = '0';
} else if (brushStyle === 'butt') {
brushPreview.style.borderRadius = '0';
}else if (brushStyle==='ellipse'){
brushPreview.style.borderRadius = '50% / 50%';
}
});
let lastX;
let lastY;
// 當滑鼠按下時，開始繪製
brushCanvas.addEventListener('mousedown', (e) => {
const rect = brushCanvas.getBoundingClientRect();
//const mouseX = e.clientX - rect.left;
//const mouseY = e.clientY - rect.top;
const scale = zoomRange.value; // 获取当前缩放比例
const mouseX = (e.clientX - rect.left) / scale; // 修復滑鼠位置適應scale
const mouseY = (e.clientY - rect.top) / scale; // 修復滑鼠位置適應scale
brushCtx.beginPath();
brushCtx.moveTo(mouseX, mouseY);
isDrawing = true;
const brushSize = document.getElementById('brush-size').value;
const brushStyle = document.getElementById('brush-style').value;
if (isDrawing) {
//繪製橢圓筆刷
if (brushStyle === 'ellipse') {
// 繪製橢圓筆刷
const centerX = (lastX + mouseX) / 2;
const centerY = (lastY + mouseY) / 2;
const rx = Math.abs(lastX - mouseX) / 2;
const ry = Math.abs(lastY - mouseY) / 2;
brushCtx.save();
brushCtx.beginPath();
brushCtx.translate(centerX, centerY);
//brushCtx.ellipse(0, 0, brushSize / 2, brushSize / 2, 0, 0, 2 * Math.PI);
brushCtx.ellipse(brushSize / 2, brushSize / 4, brushSize / 4, brushSize / 4, 0, 0, 2 * Math.PI);
brushCtx.restore();
brushCtx.fillStyle = document.getElementById('color-picker').value;
brushCtx.fill();
} else {
brushCtx.beginPath();
brushCtx.moveTo(lastX, lastY);
brushCtx.lineTo(mouseX, mouseY);
brushCtx.strokeStyle = document.getElementById('color-picker').value;
brushCtx.lineWidth = brushSize;
// 設置筆刷樣式
if (brushStyle === 'round') {
brushCtx.lineCap = 'round';
brushCtx.lineJoin = 'round';
} else if (brushStyle === 'square') {
brushCtx.lineCap = 'square';
brushCtx.lineJoin = 'miter';
} else if (brushStyle === 'butt') {
brushCtx.lineCap = 'butt';
brushCtx.lineJoin = 'miter';
}
brushCtx.stroke();
}
}
lastX = (e.clientX - rect.left) / zoomRange.value;
lastY = (e.clientY - rect.top) / zoomRange.value;
});
//滑鼠移動時，繪製筆刷
brushCanvas.addEventListener('mousemove', (e) => {
const rect = brushCanvas.getBoundingClientRect();
//const mouseX = e.clientX - rect.left;
// const mouseY = e.clientY - rect.top;
const scale = zoomRange.value; // 获取当前缩放比例
const mouseX = (e.clientX - rect.left) / scale; // 修復滑鼠位置適應scale
const mouseY = (e.clientY - rect.top) / scale; // 修復滑鼠位置適應scale
const brushSize = document.getElementById('brush-size').value;
const brushStyle = document.getElementById('brush-style').value;
// 更新筆刷預覽位置
// 獲取canvas的邊界框
const canvasRect = brushCanvas.getBoundingClientRect();
// 使用canvas的邊界框作為筆刷預覽元素的位置參考(確保預覽筆刷在滑鼠中心位置)
brushPreview.style.left = `${mouseX - brushSize / 2}px`;
brushPreview.style.top = `${mouseY - brushSize / 2}px`;
if (isDrawing) {
if (brushStyle === 'ellipse') {
// 繪製橢圓筆刷
const centerX = (lastX + mouseX) / 2;
const centerY = (lastY + mouseY) / 2;
const rx = Math.abs(lastX - mouseX) / 2;
const ry = Math.abs(lastY - mouseY) / 2;
brushCtx.save();
brushCtx.beginPath();
brushCtx.translate(centerX, centerY);
//brushCtx.ellipse(0, 0, brushSize / 2, brushSize / 2, 0, 0, 2 * Math.PI);
brushCtx.ellipse(brushSize / 2, brushSize / 4, brushSize / 4, brushSize / 4, 0, 0, 2 * Math.PI);
brushCtx.restore();
brushCtx.fillStyle = document.getElementById('color-picker').value;
brushCtx.fill();
} else {
brushCtx.beginPath();
brushCtx.moveTo(lastX, lastY);
brushCtx.lineTo(mouseX, mouseY);
brushCtx.strokeStyle = document.getElementById('color-picker').value;
brushCtx.lineWidth = brushSize;
// 設置筆刷樣式
if (brushStyle === 'round') {
brushCtx.lineCap = 'round';
brushCtx.lineJoin = 'round';
} else if (brushStyle === 'square') {
brushCtx.lineCap = 'square';
brushCtx.lineJoin = 'miter';
} else if (brushStyle === 'butt') {
brushCtx.lineCap = 'butt';
brushCtx.lineJoin = 'miter';
}
brushCtx.stroke();
}
}
// 更新上一個滑鼠位置
//lastX = mouseX;
//lastY = mouseY;
lastX = (e.clientX - rect.left) / zoomRange.value;
lastY = (e.clientY - rect.top) / zoomRange.value;
});
// 當滑鼠放開時，停止繪製
brushCanvas.addEventListener('mouseup', () => {
isDrawing = false;
});
// 當滑鼠離開canvas時，停止繪製
brushCanvas.addEventListener('mouseleave', () => {
isDrawing = false;
});
// 當滑鼠按下時，開始繪製
brushCanvas.addEventListener('mousedown', (e) => {
const rect = brushCanvas.getBoundingClientRect();
const scale = zoomRange.value; // 获取当前缩放比例
const mouseX = (e.clientX - rect.left) / scale; // 修復滑鼠位置適應scale
const mouseY = (e.clientY - rect.top) / scale; // 修復滑鼠位置適應scale
lastX = (e.clientX - rect.left) / zoomRange.value;
lastY = (e.clientY - rect.top) / zoomRange.value;
isDrawing = true;
});
// 添加橡皮擦功能
const eraserButton = document.getElementById('eraser');
eraserButton.addEventListener('click', () => {
brushCtx.save(); // 使用save()方法保存畫布狀態
brushCtx.globalCompositeOperation = 'destination-out'; // 將畫布模式設置為橡皮擦模式
});
// 筆刷模式
const brushButton = document.getElementById('brush');
brushButton.addEventListener('click', () => {
// 使用restore()方法恢復畫布狀態
brushCtx.restore();
// 將畫布模式設置為筆刷模式
brushCtx.globalCompositeOperation = 'source-over';
});
// 添加重置畫布為原圖功能
const resetButton = document.getElementById('reset');
resetButton.addEventListener('click', () => {
// 清空畫布
brushCtx.clearRect(0, 0, brushCanvas.width, brushCanvas.height);
// 使用drawImage()方法重新繪製原始圖像
backgroundCtx.drawImage(imageObj, 0, 0, backgroundCanvas.width, backgroundCanvas.height);
});
container.appendChild(backgroundCanvas);
container.appendChild(brushCanvas);
//container.appendChild(canvas);
}
});
reader.readAsDataURL(file);
}
});
document.getElementById('color-picker').addEventListener('change', () => {
const canvases = document.getElementsByTagName('canvas');
for (let i = 0; i < canvases.length; i++) {
const ctx = canvases[i].getContext('2d');
ctx.strokeStyle = document.getElementById('color-picker').value;
}
});
document.getElementById('brush-size').addEventListener('input', () => {
const canvases = document.getElementsByTagName('canvas');
for (let i = 0; i < canvases.length; i++) {
const ctx = canvases[i].getContext('2d');
ctx.lineWidth = document.getElementById('brush-size').value;
}
});
// 加載圖片
function loadImage(src) {
return new Promise((resolve, reject) => {
const img = new Image();
img.crossOrigin = 'anonymous';
img.onload = () => resolve(img);
img.onerror = reject;
img.src = src;
});
}
/*
按下下載按鈕
將所有canvas中的筆刷部分繪製到一個新的canvas中
*/
downloadButton.addEventListener('click', () => {
const canvases = document.getElementsByTagName('canvas');
const zip = new JSZip();
for (let i = 0; i < canvases.length; i += 2) {
const backgroundCanvas = canvases[i];
const brushCanvas = canvases[i + 1];
const width = backgroundCanvas.width;
const height = backgroundCanvas.height;
// 創建一個新的canvas來合併底圖和筆刷
const mergedCanvas = document.createElement('canvas');
mergedCanvas.width = width;
mergedCanvas.height = height;
const mergedCtx = mergedCanvas.getContext('2d');
mergedCtx.drawImage(backgroundCanvas, 0, 0, width, height);
mergedCtx.drawImage(brushCanvas, 0, 0, width, height);
const filename = backgroundCanvas.dataset.filename; // 根據選擇圖片的原檔名命名圖片
console.log(filename);
zip.file(filename, mergedCanvas.toDataURL('image/png').replace(/^.*,/, ''), {
base64: true
});
}
zip.generateAsync({
type: 'blob'
}).then(function(content) {
// 下載壓縮檔
saveAs(content, 'drawings.zip');
});
});
// // 建立 generateZipFile 函式
// function generateZipFileOutput() {
// const zip = new JSZip();
// const canvases = document.getElementsByTagName('canvas');
// for (let i = 0; i < canvases.length; i++) {
// const canvas = canvases[i];
// const filename = fileInput.files[i].name; // 根據選擇圖片的原檔名命名圖片
// zip.file(filename, canvas.toDataURL('image/png').replace(/^.*,/, ''), {
// base64: true
// });
// }
// zip.generateAsync({
// type: 'blob'
// }).then(function(content) {
// // 下載壓縮檔
// saveAs(content, 'drawings.zip');
// });
// }
// const saveButton = document.getElementById('save-button');
// saveButton.addEventListener('click', generateZipFileOutput);
/**
* 將畫布內容轉換為壓縮檔
* @param {HTMLCanvasElement} canvas - 要轉換的畫布
* @param {string} fileName - 轉換後的檔案名稱
* @returns {Blob} 包含壓縮檔的Blob物件
*/
async function generateZipFile(canvas, fileName) {
// 建立一個 JSZip 實例
const zip = new JSZip();
// 將畫布內容轉換為 base64 編碼的圖片資料
const imgData = canvas.toDataURL('image/png').replace(/^data:image\/(png|jpg);base64,/, '');
// 將圖片資料加入壓縮檔案中，並使用原始檔名命名壓縮檔
zip.file(fileName, imgData, {
base64: true
});
// 生成壓縮檔，並將其轉換為 Blob 物件
return await zip.generateAsync({
type: 'blob'
});
}
</script>
</html>