123/image-editor.html at main · Waixuexi994/123 · GitHub

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<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>图片编辑工具</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 20px;
            background-color: #f5f5f5;
        }
        .container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            text-align: center;
        }
        .upload-area {
            border: 2px dashed #ccc;
            border-radius: 10px;
            padding: 20px;
            margin-bottom: 20px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .upload-area:hover {
            border-color: #2c3e50;
            background-color: #f8f9fa;
        }
        .upload-text {
            color: #666;
            margin-bottom: 10px;
        }
        .edit-button {
            padding: 10px 20px;
            background-color: #2c3e50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
            margin-top: 20px;
        }
        .edit-button:hover {
            background-color: #34495e;
        }
        .preview-image {
            max-width: 100%;
            height: auto;
            margin-top: 20px;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .back-button {
            padding: 8px 15px;
            background-color: #2c3e50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 14px;
            margin-bottom: 20px;
            display: inline-block;
        }
        .back-button:hover {
            background-color: #34495e;
        }
        .canvas-container {
            position: relative;
            display: inline-block;
            background: white;
            padding: 10px;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            cursor: crosshair;
        }
        .crop-buttons {
            position: absolute;
            display: none;
            gap: 10px;
            padding: 10px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }
        .crop-button {
            padding: 5px 15px;
            border: none;
            border-radius: 3px;
            cursor: pointer;
            font-size: 14px;
            color: white;
        }
        .confirm-button {
            background-color: #28a745;
        }
        .confirm-button:hover {
            background-color: #218838;
        }
        .cancel-button {
            background-color: #dc3545;
        }
        .cancel-button:hover {
            background-color: #c82333;
        }
        canvas {
            border: 1px solid #ccc;
            border-radius: 10px;
            max-width: 100%;
        }
        .controls {
            margin-top: 20px;
        }
        .control-button {
            padding: 8px 15px;
            background-color: #2c3e50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 14px;
            margin: 5px;
        }
        .control-button:hover {
            background-color: #34495e;
        }
        .tip-text {
            color: #666;
            background-color: #f8f9fa;
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 15px;
            border-left: 4px solid #2c3e50;
            font-size: 14px;
        }
    </style>
</head>
<body>
    <button class="back-button" onclick="window.location.href='aa.html'">← 返回主页面</button>
    <div class="container">
        <div class="tip-text">提示：对着图片右键，选择"图像另存为"即可保存图片</div>
        <div class="upload-area" onclick="triggerFileInput()">
            <div class="upload-text">点击或拖拽图片到此处</div>
        </div>
        <input type="file" id="fileInput" style="display: none;" accept="image/*" onchange="handleFileSelect(event)">
        <div class="canvas-container">
            <canvas id="canvas" style="display: none;"></canvas>
            <div class="crop-buttons" id="cropButtons">
                <button class="crop-button confirm-button" onclick="confirmCrop()">保留</button>
                <button class="crop-button cancel-button" onclick="cancelCrop()">取消</button>
            </div>
        </div>
        <div class="controls" style="display: none;">
            <button class="control-button" onclick="rotateImage(-30)">左旋30°</button>
            <button class="control-button" onclick="rotateImage(30)">右旋30°</button>
            <button class="control-button" onclick="flipImage('horizontal')">左右对调</button>
            <button class="control-button" onclick="flipImage('vertical')">上下对调</button>
            <button class="control-button" onclick="cropImage()">裁剪选区</button>
        </div>
    </div>

    <script>
        let selectedFile = null;
        let canvas, ctx;
        let img = new Image();
        let startX, startY, endX, endY;
        let isDrawing = false;
        let currentRotation = 0;
        let originalImageData = null;
        let tempCanvas = document.createElement('canvas');
        let tempCtx = tempCanvas.getContext('2d');

        function triggerFileInput() {
            document.getElementById('fileInput').click();
        }

        function handleFileSelect(event) {
            const file = event.target.files[0];
            if (file && file.type.startsWith('image/')) {
                selectedFile = file;
                const reader = new FileReader();
                reader.onload = function(e) {
                    img.src = e.target.result;
                    img.onload = function() {
                        initCanvas();
                        document.querySelector('.controls').style.display = 'block';
                    };
                };
                reader.readAsDataURL(file);
            } else {
                alert('请选择图片文件');
            }
        }

        function initCanvas() {
            canvas = document.getElementById('canvas');
            ctx = canvas.getContext('2d');
            canvas.width = img.width;
            canvas.height = img.height;
            ctx.drawImage(img, 0, 0);
            canvas.style.display = 'block';
            currentRotation = 0;
            originalImageData = ctx.getImageData(0, 0, canvas.width, canvas.height);

            // 初始化临时画布
            tempCanvas.width = canvas.width;
            tempCanvas.height = canvas.height;
            tempCtx.drawImage(canvas, 0, 0);

            bindCanvasEvents();
        }

        function bindCanvasEvents() {
            canvas.addEventListener('mousedown', startDrawing);
            canvas.addEventListener('mousemove', drawSelection);
            canvas.addEventListener('mouseup', endDrawing);
            canvas.addEventListener('mouseleave', cancelDrawing);
        }

        function startDrawing(e) {
            document.getElementById('cropButtons').style.display = 'none';

            isDrawing = true;
            const rect = canvas.getBoundingClientRect();
            const scaleX = canvas.width / rect.width;
            const scaleY = canvas.height / rect.height;
            startX = (e.clientX - rect.left) * scaleX;
            startY = (e.clientY - rect.top) * scaleY;

            // 保存当前画布状态
            tempCtx.clearRect(0, 0, tempCanvas.width, tempCanvas.height);
            tempCtx.drawImage(canvas, 0, 0);
        }

        function drawSelection(e) {
            if (!isDrawing) return;

            const rect = canvas.getBoundingClientRect();
            const scaleX = canvas.width / rect.width;
            const scaleY = canvas.height / rect.height;
            endX = (e.clientX - rect.left) * scaleX;
            endY = (e.clientY - rect.top) * scaleY;

            // 恢复原始图像
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            ctx.drawImage(tempCanvas, 0, 0);

            // 绘制选区边框
            ctx.strokeStyle = '#ff0000';
            ctx.lineWidth = 3;
            ctx.setLineDash([]);
            ctx.strokeRect(
                Math.min(startX, endX),
                Math.min(startY, endY),
                Math.abs(endX - startX),
                Math.abs(endY - startY)
            );
        }

        function endDrawing() {
            if (!isDrawing) return;
            isDrawing = false;
            ctx.setLineDash([]);

            // 显示裁剪按钮，并设置正确的位置
            const cropButtons = document.getElementById('cropButtons');
            cropButtons.style.display = 'flex';
            cropButtons.style.position = 'absolute';

            // 确保按钮显示在选区附近且不超出画布范围
            const rect = canvas.getBoundingClientRect();
            const buttonX = Math.min(startX, endX);
            const buttonY = Math.max(0, Math.min(startY, endY) - 40); // 确保不会超出顶部
            cropButtons.style.left = `${buttonX}px`;
            cropButtons.style.top = `${buttonY}px`;
        }

        function cancelDrawing() {
            if (isDrawing) {
                isDrawing = false;
                ctx.clearRect(0, 0, canvas.width, canvas.height);
                ctx.drawImage(tempCanvas, 0, 0);
                ctx.setLineDash([]);
            }
        }

        function confirmCrop() {
            const cropWidth = Math.abs(endX - startX);
            const cropHeight = Math.abs(endY - startY);
            const startXPos = Math.min(startX, endX);
            const startYPos = Math.min(startY, endY);

            const imageData = ctx.getImageData(startXPos, startYPos, cropWidth, cropHeight);

            canvas.width = cropWidth;
            canvas.height = cropHeight;
            ctx.putImageData(imageData, 0, 0);

            // 更新临时画布
            tempCanvas.width = cropWidth;
            tempCanvas.height = cropHeight;
            tempCtx.putImageData(imageData, 0, 0);

            // 隐藏裁剪按钮
            document.getElementById('cropButtons').style.display = 'none';

            // 重置选区坐标
            startX = startY = endX = endY = undefined;
        }

        function cancelCrop() {
            // 恢复原始图像
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            ctx.drawImage(tempCanvas, 0, 0);

            // 隐藏裁剪按钮
            document.getElementById('cropButtons').style.display = 'none';

            // 重置选区坐标
            startX = startY = endX = endY = undefined;
        }

        function calculateRotatedSize(width, height, angle) {
            const radians = (angle * Math.PI) / 180;
            const sin = Math.abs(Math.sin(radians));
            const cos = Math.abs(Math.cos(radians));

            const newWidth = Math.floor(width * cos + height * sin);
            const newHeight = Math.floor(width * sin + height * cos);

            return { width: newWidth, height: newHeight };
        }

        function rotateImage(degrees) {
            currentRotation = (currentRotation + degrees) % 360;
            const radians = (currentRotation * Math.PI) / 180;

            const { width: newWidth, height: newHeight } = calculateRotatedSize(img.width, img.height, currentRotation);

            const tempCanvas = document.createElement('canvas');
            const tempCtx = tempCanvas.getContext('2d');
            tempCanvas.width = newWidth;
            tempCanvas.height = newHeight;

            tempCtx.clearRect(0, 0, newWidth, newHeight);

            tempCtx.translate(newWidth / 2, newHeight / 2);
            tempCtx.rotate(radians);

            tempCtx.drawImage(img, -img.width / 2, -img.height / 2);

            canvas.width = newWidth;
            canvas.height = newHeight;
            ctx.clearRect(0, 0, newWidth, newHeight);
            ctx.drawImage(tempCanvas, 0, 0);
        }

        function flipImage(direction) {
            const width = canvas.width;
            const height = canvas.height;

            const tempCanvas = document.createElement('canvas');
            const tempCtx = tempCanvas.getContext('2d');
            tempCanvas.width = width;
            tempCanvas.height = height;

            if (direction === 'horizontal') {
                tempCtx.translate(width, 0);
                tempCtx.scale(-1, 1);
            } else if (direction === 'vertical') {
                tempCtx.translate(0, height);
                tempCtx.scale(1, -1);
            }

            tempCtx.drawImage(canvas, 0, 0);

            ctx.clearRect(0, 0, width, height);
            ctx.drawImage(tempCanvas, 0, 0);
        }

        function cropImage() {
            if (startX !== undefined && startY !== undefined && endX !== undefined && endY !== undefined) {
                const cropWidth = Math.abs(endX - startX);
                const cropHeight = Math.abs(endY - startY);
                const startXPos = Math.min(startX, endX);
                const startYPos = Math.min(startY, endY);

                const tempCanvas = document.createElement('canvas');
                const tempCtx = tempCanvas.getContext('2d');
                tempCanvas.width = cropWidth;
                tempCanvas.height = cropHeight;

                tempCtx.drawImage(
                    canvas,
                    startXPos, startYPos, cropWidth, cropHeight,
                    0, 0, cropWidth, cropHeight
                );

                canvas.width = cropWidth;
                canvas.height = cropHeight;
                ctx.drawImage(tempCanvas, 0, 0);

                originalImageData = ctx.getImageData(0, 0, canvas.width, canvas.height);

                startX = startY = endX = endY = undefined;
            }
        }
    </script>
</body>
</html>