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<!DOCTYPE html>
<html lang="ja">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>RGBYカーブエディタ</title>
    <link rel="stylesheet" href="{{ url_for('static', filename='styles.css') }}">
</head>
<body>
    <div class="container">
        <h1>RGBYカーブエディタ</h1>
        
        <form method="post" enctype="multipart/form-data" onsubmit="showLoading()">
        <div class="upload-section">
            <input type="file" id="fileInput" accept=".jpg,.jpeg,.png">
            <button id="uploadBtn">画像を読み込み</button>
            <div id="loading" style="display:none;">処理中...</div>
        </div>
        
            <div class="curve-controls">
                <h2>2Dトーンカーブエディタ</h2>
                <div class="curve-editor-container">
                    <canvas id="curveCanvas" width="400" height="400"></canvas>
                    <div class="curve-presets">
                        <button type="button" onclick="setLinearCurve()">リニア</button>
                        <button type="button" onclick="setContrastCurve()">コントラスト↑</button>
                        <button type="button" onclick="setInverseCurve()">反転</button>
                    </div>
                </div>
                
                <div class="channel-controls">
                    <div class="channel">
                        <h3>Redチャンネル</h3>
                        <div class="sliders">
                            {% for i in range(1, 6) %}
                            <div class="slider-container">
                                <label>ポイント{{ i }}</label>
                                <input type="range" min="0" max="255" value="{{ r_curve[i-1] }}" 
                                       name="r{{ i }}" id="r{{ i }}" class="slider" oninput="updateCurve()">
                                <span class="slider-value">{{ r_curve[i-1] }}</span>
                            </div>
                            {% endfor %}
                        </div>
                    </div>
                    
                    <div class="channel">
                        <h3>Greenチャンネル</h3>
                        <div class="sliders">
                            {% for i in range(1, 6) %}
                            <div class="slider-container">
                                <label>ポイント{{ i }}</label>
                                <input type="range" min="0" max="255" value="{{ g_curve[i-1] }}" 
                                       name="g{{ i }}" id="g{{ i }}" class="slider" oninput="updateCurve()">
                                <span class="slider-value">{{ g_curve[i-1] }}</span>
                            </div>
                            {% endfor %}
                        </div>
                    </div>
                    
                    <div class="channel">
                        <h3>Blueチャンネル</h3>
                        <div class="sliders">
                            {% for i in range(1, 6) %}
                            <div class="slider-container">
                                <label>ポイント{{ i }}</label>
                                <input type="range" min="0" max="255" value="{{ b_curve[i-1] }}" 
                                       name="b{{ i }}" id="b{{ i }}" class="slider" oninput="updateCurve()">
                                <span class="slider-value">{{ b_curve[i-1] }}</span>
                            </div>
                            {% endfor %}
                        </div>
                    </div>
                    
                    <div class="channel">
                        <h3>明るさ (Y)</h3>
                        <div class="sliders">
                            {% for i in range(1, 6) %}
                            <div class="slider-container">
                                <label>ポイント{{ i }}</label>
                                <input type="range" min="0" max="255" value="{{ y_curve[i-1] }}" 
                                       name="y{{ i }}" id="y{{ i }}" class="slider" oninput="updateCurve()">
                                <span class="slider-value">{{ y_curve[i-1] }}</span>
                            </div>
                            {% endfor %}
                        </div>
                    </div>
                </div>
            </div>
        </form>
        <div class="image-comparison">
            <div class="image-container">
                <h2>元画像</h2>
                <img id="originalImage" src="" alt="Original Image" style="display:none;">
                <canvas id="originalCanvas"></canvas>
            </div>
            <div class="image-container">
                <h2>調整後画像</h2>
                <canvas id="adjustedCanvas"></canvas>
            </div>
        </div>
    </div>
    
    <script src="{{ url_for('static', filename='js/curve_editor.js') }}"></script>
    <script>
        // グローバル変数
        let originalImageData = null;
        
        // DOM要素を取得
        const fileInput = document.getElementById('fileInput');
        const uploadBtn = document.getElementById('uploadBtn');
        const originalImage = document.getElementById('originalImage');
        const originalCanvas = document.getElementById('originalCanvas');
        const adjustedCanvas = document.getElementById('adjustedCanvas');
        const loadingIndicator = document.getElementById('loading');
        
        // 画像アップロード処理
        uploadBtn.addEventListener('click', async () => {
            const file = fileInput.files[0];
            if (!file) return;
            
            try {
                loadingIndicator.style.display = 'block';
                
                // 画像を読み込み
                const reader = new FileReader();
                reader.onload = async (e) => {
                    originalImage.src = e.target.result;
                    originalImage.onload = async () => {
                        // Canvasに描画
                        drawImageToCanvas(originalImage, originalCanvas);
                        
                        // 画像データを保存
                        originalImageData = await getImageData(originalCanvas);
                        
                        // 初期処理を実行
                        await processImage();
                        
                        loadingIndicator.style.display = 'none';
                    };
                };
                reader.readAsDataURL(file);
            } catch (error) {
                console.error('Error:', error);
                loadingIndicator.style.display = 'none';
                alert('画像の読み込みに失敗しました');
            }
        });
        
        // 画像処理関数
        async function processImage() {
            if (!originalImageData) return;
            
            try {
                loadingIndicator.style.display = 'block';
                
                // カーブパラメータを取得
                const params = {
                    image: originalImageData,
                    r_curve: [
                        parseInt(document.getElementById('r1').value),
                        parseInt(document.getElementById('r2').value),
                        parseInt(document.getElementById('r3').value),
                        parseInt(document.getElementById('r4').value),
                        parseInt(document.getElementById('r5').value)
                    ],
                    g_curve: [
                        parseInt(document.getElementById('g1').value),
                        parseInt(document.getElementById('g2').value),
                        parseInt(document.getElementById('g3').value),
                        parseInt(document.getElementById('g4').value),
                        parseInt(document.getElementById('g5').value)
                    ],
                    b_curve: [
                        parseInt(document.getElementById('b1').value),
                        parseInt(document.getElementById('b2').value),
                        parseInt(document.getElementById('b3').value),
                        parseInt(document.getElementById('b4').value),
                        parseInt(document.getElementById('b5').value)
                    ],
                    y_curve: [
                        parseInt(document.getElementById('y1').value),
                        parseInt(document.getElementById('y2').value),
                        parseInt(document.getElementById('y3').value),
                        parseInt(document.getElementById('y4').value),
                        parseInt(document.getElementById('y5').value)
                    ]
                };
                
                // APIを呼び出し
                const response = await fetch('/api/process_image', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    body: JSON.stringify(params)
                });
                
                const result = await response.json();
                
                if (result.status === 'success') {
                    // 処理後の画像を表示
                    const img = new Image();
                    img.onload = () => {
                        drawImageToCanvas(img, adjustedCanvas);
                        loadingIndicator.style.display = 'none';
                    };
                    img.src = result.image;
                } else {
                    throw new Error(result.message);
                }
            } catch (error) {
                console.error('Error:', error);
                loadingIndicator.style.display = 'none';
                alert('画像処理に失敗しました');
            }
        }
        
        // 画像をCanvasに描画
        function drawImageToCanvas(image, canvas) {
            const ctx = canvas.getContext('2d');
            canvas.width = image.width;
            canvas.height = image.height;
            ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
        }
        
        // Canvasから画像データを取得
        async function getImageData(canvas) {
            return new Promise((resolve) => {
                canvas.toBlob((blob) => {
                    const reader = new FileReader();
                    reader.onload = () => resolve(reader.result);
                    reader.readAsDataURL(blob);
                }, 'image/jpeg', 0.9);
            });
        }
        
        // スライダー変更時に画像処理を実行
        document.querySelectorAll('.slider').forEach(slider => {
            slider.addEventListener('input', function() {
                const valueSpan = this.parentElement.querySelector('.slider-value');
                valueSpan.textContent = this.value;
                
                // デバウンス処理 (連続変更を防ぐ)
                if (this.timeout) clearTimeout(this.timeout);
                this.timeout = setTimeout(processImage, 300);
            });
        });
        
        // 初期化
        document.addEventListener('DOMContentLoaded', function() {
            // スライダーの値を表示
            document.querySelectorAll('.slider').forEach(slider => {
                const valueSpan = slider.parentElement.querySelector('.slider-value');
                valueSpan.textContent = slider.value;
            });
            
            // カーブエディタを初期化
            initCurveEditor();
            
            // カーブエディタの変更時に処理を実行
            window.updateCurve = function() {
                processImage();
            };
        });
    </script>
</body>
</html>