Trace AI

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\n\n \n \n\n \n\n","\n\n\n \n \n Trace AI\n \n \n \n\n\n

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\n\n \n \n\n \n\n","createdAt",["D",1756417887569],"branchVersion","branchId","3d637076-838f-11f0-b8db-0224a6c84d84","id","3d631a54-838f-11f0-b8db-0224a6c84d84","tracey-mctraceface",["D",1756331168191],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Do a drawing and see it with Gemini Flash 2.5 image 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Trace AI\n\nA minimal drawing application where AI automatically generates artwork beneath your sketches as you draw.\n\n## Features\n\n- **🎯 Canvas-Focused**: Clean, minimal interface focused purely on the drawing experience\n- **🔐 Basic Auth Protected**: Secure access with username/password authentication\n- **📏 Configurable Canvas Size**: Choose from 512x512, 768x768, or 1024x1024 pixels\n- **✨ Auto-Generation**: AI generates artwork automatically as you draw\n- **🎭 Exact Size Matching**: Canvas and AI output are exactly the same dimensions\n- **🔄 Toggle Views**: Switch between sketch overlay and pure AI artwork\n- **💾 Direct Save**: Save the AI-generated artwork directly\n- **⚡ Responsive Drawing**: Low-latency drawing with Ink API support\n- **🌈 Colorful Generation Feedback**: Beautiful multi-color glow effects when AI is generating new artwork\n\n## Project Structure\n\n```\n├── backend/\n│ └── index.ts # API endpoint with Gemini integration\n├── frontend/\n│ ├── index.html # Minimal HTML interface\n│ ├── app.js # Main application logic\n│ ├── components/\n│ │ ├── drawing-canvas.js # Canvas Web Component with size control\n│ │ └── control-panel.js # Minimal control panel\n│ └── style.css # Clean, minimal styles\n└── README.md\n```\n\n## Setup\n\n1. **Set the API Key**: Add your Google Gemini API key as an environment variable in Val Town:\n - Go to your Val Town settings\n - Add `GEMINI_API_KEY` with your Google AI Studio API key\n - Get your API key from: https://aistudio.google.com/app/apikey\n\n2. **Set Basic Auth Credentials**: Add Basic Auth environment variables in Val Town:\n - Add `BASIC_AUTH_USERNAME` with your desired username\n - Add `BASIC_AUTH_PASSWORD` with your desired password\n - These credentials will be required to access the application and API\n\n3. **Access the Application**: The application will be available at the HTTP endpoint URL provided by Val Town\n - You'll be prompted for username and password when accessing the site\n\n## Usage\n\n1. **Select Size**: Choose your preferred canvas size (512x512, 768x768, or 1024x1024)\n2. **Draw**: Start sketching - AI automatically generates artwork underneath\n3. **Toggle**: Use \"Show AI Only\" to see the pure AI artwork or your sketch overlay\n4. **Save**: Click \"Save\" to download the AI-generated image\n\n## Controls\n\n- **Clear**: Remove all drawing and generated artwork\n- **Show AI Only / Show Sketch**: Toggle between views\n- **Save**: Download the current AI-generated artwork\n- **Canvas Size**: Change the canvas dimensions\n\n## Keyboard Shortcuts\n\n- `Ctrl/Cmd + N`: Clear the canvas\n- `Ctrl/Cmd + S`: Save the generated image\n\n## Technical Details\n\n- **Frontend**: Vanilla JavaScript with Web Components, Tailwind CSS\n- **Backend**: Deno runtime on Val Town with Hono framework\n- **AI Model**: Google Gemini 2.5 Flash Image Preview\n- **Canvas**: HTML5 Canvas with optimized 2D context for low latency\n- **Generation Feedback**: Colorful visual effects including rainbow glow cycling through pink, purple, blue, green, yellow, and orange tones, plus a matching colorful spinner in the loading indicator\n- **Accessibility**: Respects `prefers-reduced-motion` for users who prefer minimal 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Minimal Canvas-focused styles */\n\nbody {\n font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;\n}\n\n.canvas-workspace {\n max-width: 100%;\n max-height: 100vh;\n display: flex;\n flex-direction: column;\n}\n\n.canvas-controls {\n background: white;\n padding: 12px 16px;\n border-radius: 8px;\n box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);\n border: 1px solid #e5e7eb;\n}\n\n/* Canvas container */\ndrawing-canvas {\n display: block;\n position: relative;\n}\n\ndrawing-canvas .canvas-container {\n position: relative;\n background: white;\n border-radius: 8px;\n box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);\n border: 1px solid #e5e7eb;\n overflow: hidden;\n transition: box-shadow 0.3s ease, transform 0.3s ease;\n /* Prevent touch interactions from bubbling up */\n touch-action: none;\n /* Prevent text selection */\n user-select: none;\n -webkit-user-select: none;\n -moz-user-select: none;\n -ms-user-select: none;\n}\n\n/* Colorful generation state */\ndrawing-canvas .canvas-container.generating {\n animation: colorful-glow 4s ease-in-out infinite, subtle-pulse 2s ease-in-out infinite;\n}\n\n/* Generation overlay */\ndrawing-canvas .generation-overlay {\n position: absolute;\n top: 0;\n left: 0;\n right: 0;\n bottom: 0;\n opacity: 0;\n pointer-events: none;\n z-index: 1;\n transition: opacity 0.5s ease;\n border-radius: 8px;\n}\n\ndrawing-canvas .generation-overlay.active {\n opacity: 1;\n animation: rainbow-shimmer 5s ease-in-out infinite;\n}\n\n/* Canvas element */\ndrawing-canvas canvas {\n display: block;\n cursor: crosshair;\n touch-action: none;\n position: relative;\n z-index: 2;\n /* Prevent text selection and other interactions */\n user-select: none;\n -webkit-user-select: none;\n -moz-user-select: none;\n -ms-user-select: none;\n /* Prevent image dragging */\n -webkit-user-drag: none;\n -khtml-user-drag: none;\n -moz-user-drag: none;\n -o-user-drag: none;\n user-drag: none;\n /* Prevent tap highlighting on mobile */\n -webkit-tap-highlight-color: transparent;\n}\n\n/* Focus styles */\nbutton:focus,\nselect:focus,\ndrawing-canvas:focus {\n outline: 2px solid #3b82f6;\n outline-offset: 2px;\n}\n\n/* Loading animation */\n@keyframes spin {\n to {\n transform: rotate(360deg);\n }\n}\n\n@keyframes subtle-pulse {\n 0%, 100% {\n transform: scale(1);\n }\n 50% {\n transform: scale(1.003);\n }\n}\n\n@keyframes colorful-glow {\n 0% {\n box-shadow: 0 4px 20px rgba(236, 72, 153, 0.3), 0 0 0 1px rgba(236, 72, 153, 0.2);\n }\n 16.66% {\n box-shadow: 0 4px 20px rgba(168, 85, 247, 0.3), 0 0 0 1px rgba(168, 85, 247, 0.2);\n }\n 33.33% {\n box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3), 0 0 0 1px rgba(59, 130, 246, 0.2);\n }\n 50% {\n box-shadow: 0 4px 20px rgba(34, 197, 94, 0.3), 0 0 0 1px rgba(34, 197, 94, 0.2);\n }\n 66.66% {\n box-shadow: 0 4px 20px rgba(251, 191, 36, 0.3), 0 0 0 1px rgba(251, 191, 36, 0.2);\n }\n 83.33% {\n box-shadow: 0 4px 20px rgba(249, 115, 22, 0.3), 0 0 0 1px rgba(249, 115, 22, 0.2);\n }\n 100% {\n box-shadow: 0 4px 20px rgba(236, 72, 153, 0.3), 0 0 0 1px rgba(236, 72, 153, 0.2);\n }\n}\n\n@keyframes rainbow-shimmer {\n 0% {\n background: linear-gradient(45deg, \n rgba(236, 72, 153, 0.08) 0%, \n rgba(168, 85, 247, 0.06) 25%, \n rgba(59, 130, 246, 0.08) 50%, \n rgba(34, 197, 94, 0.06) 75%, \n rgba(236, 72, 153, 0.08) 100%);\n }\n 25% {\n background: linear-gradient(45deg, \n rgba(168, 85, 247, 0.08) 0%, \n rgba(59, 130, 246, 0.06) 25%, \n rgba(34, 197, 94, 0.08) 50%, \n rgba(251, 191, 36, 0.06) 75%, \n rgba(168, 85, 247, 0.08) 100%);\n }\n 50% {\n background: linear-gradient(45deg, \n rgba(59, 130, 246, 0.08) 0%, \n rgba(34, 197, 94, 0.06) 25%, \n rgba(251, 191, 36, 0.08) 50%, \n rgba(249, 115, 22, 0.06) 75%, \n rgba(59, 130, 246, 0.08) 100%);\n }\n 75% {\n background: linear-gradient(45deg, \n rgba(34, 197, 94, 0.08) 0%, \n rgba(251, 191, 36, 0.06) 25%, \n rgba(249, 115, 22, 0.08) 50%, \n rgba(236, 72, 153, 0.06) 75%, \n rgba(34, 197, 94, 0.08) 100%);\n }\n 100% {\n background: linear-gradient(45deg, \n rgba(236, 72, 153, 0.08) 0%, \n rgba(168, 85, 247, 0.06) 25%, \n rgba(59, 130, 246, 0.08) 50%, \n rgba(34, 197, 94, 0.06) 75%, \n rgba(236, 72, 153, 0.08) 100%);\n }\n}\n\n.animate-spin {\n animation: spin 1s linear infinite;\n}\n\n.colorful-spinner {\n width: 16px;\n height: 16px;\n border-radius: 50%;\n background: conic-gradient(from 0deg, #ec4899, #a855f7, #3b82f6, #22c55e, #fbbf24, #f97316, #ec4899);\n mask: radial-gradient(circle at center, transparent 30%, black 32%);\n -webkit-mask: radial-gradient(circle at center, transparent 30%, black 32%);\n animation: spin 1s linear infinite;\n}\n\n/* Responsive */\n@media (max-width: 768px) {\n .canvas-controls {\n flex-direction: column;\n gap: 12px;\n }\n \n .canvas-controls .flex {\n justify-content: center;\n }\n \n .canvas-controls .ml-auto {\n margin-left: 0;\n }\n}\n\n/* High contrast mode */\n@media (prefers-contrast: high) {\n .canvas-controls {\n border: 2px solid #000;\n }\n \n drawing-canvas .canvas-container {\n border: 2px solid #000;\n }\n}\n\n/* Reduced motion */\n@media (prefers-reduced-motion: reduce) {\n .animate-spin {\n animation: none;\n }\n \n button {\n transition: none;\n }\n \n drawing-canvas .canvas-container {\n transition: none;\n }\n \n drawing-canvas .canvas-container.generating {\n animation: none;\n box-shadow: 0 4px 20px rgba(168, 85, 247, 0.25), 0 0 0 1px rgba(168, 85, 247, 0.15);\n }\n \n drawing-canvas .generation-overlay {\n transition: none;\n }\n \n drawing-canvas .generation-overlay.active {\n animation: none;\n background: linear-gradient(45deg, \n rgba(168, 85, 247, 0.06) 0%, \n rgba(59, 130, 246, 0.08) 50%, \n rgba(168, 85, 247, 0.06) 100%);\n }\n}",[],[143,181],"262b32b6-8459-11f0-ad8c-0224a6c84d84",["D",1756417887569],7,[],[143,33],"bf34adca-8396-11f0-b1cf-0224a6c84d84","app.js","81144e02-8390-11f0-b11d-0224a6c84d84",49,["D",1756334392458],"script","// Import Web Components\nimport './components/drawing-canvas.js';\nimport './components/control-panel.js';\n\nclass TraceAIApp {\n constructor() {\n this.init();\n }\n\n init() {\n if (document.readyState === 'loading') {\n document.addEventListener('DOMContentLoaded', () => this.setup());\n } else {\n this.setup();\n }\n }\n\n setup() {\n // Initialize control panel\n const controlPanel = document.createElement('control-panel');\n document.body.appendChild(controlPanel);\n\n // Setup keyboard shortcuts\n this.setupKeyboardShortcuts();\n \n console.log('Trace AI initialized');\n }\n\n setupKeyboardShortcuts() {\n document.addEventListener('keydown', (e) => {\n if (e.ctrlKey || e.metaKey) {\n switch (e.key) {\n case 'n':\n e.preventDefault();\n const clearBtn = document.getElementById('clearButton');\n if (clearBtn && !clearBtn.disabled) {\n clearBtn.click();\n }\n break;\n case 's':\n e.preventDefault();\n const saveBtn = document.getElementById('saveButton');\n if (saveBtn && !saveBtn.classList.contains('hidden')) {\n saveBtn.click();\n }\n break;\n }\n }\n });\n }\n}\n\n// Initialize the application\nnew TraceAIApp();",[],[143,195],"1bc0c44e-8459-11f0-bfa0-0224a6c84d84","drawing-canvas.js","5bd0a88e-8390-11f0-ba68-0224a6c84d84","cd94c13a-b9d8-4f61-8b31-d9e22d3b1eef",82,["D",1756417870092],10,"class DrawingCanvas extends HTMLElement {\n constructor() {\n super();\n this.canvas = null;\n this.ctx = null;\n this.isDrawing = false;\n this.lastPoint = null;\n this.supportsInk = false;\n this.inkPresenter = null;\n this.backgroundImage = null;\n this.canvasOpacity = 0.7;\n this.container = null;\n this.canvasSize = 1024; // Default size\n }\n\n connectedCallback() {\n this.render();\n this.setupCanvas();\n this.setupEventListeners();\n this.checkInkSupport();\n }\n\n render() {\n this.innerHTML = `\n

\n `;\n\n this.container = this.querySelector('.canvas-container');\n this.canvas = this.querySelector('canvas');\n this.overlay = this.querySelector('.generation-overlay');\n }\n\n setCanvasSize(size) {\n this.canvasSize = parseInt(size);\n this.render();\n this.setupCanvas();\n this.setupEventListeners();\n this.checkInkSupport();\n \n // Dispatch event for size change\n this.dispatchEvent(new CustomEvent('canvasSizeChanged', {\n bubbles: true,\n detail: { size: this.canvasSize }\n }));\n }\n\n setupCanvas() {\n // Get 2D context with optimizations for low latency\n this.ctx = this.canvas.getContext('2d', {\n desynchronized: true,\n willReadFrequently: true\n });\n\n // Set drawing properties\n this.ctx.strokeStyle = '#000000';\n this.ctx.lineWidth = 3;\n this.ctx.lineCap = 'round';\n this.ctx.lineJoin = 'round';\n \n // Start with transparent background for overlay effect\n this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);\n }\n\n checkInkSupport() {\n // Check for Ink API support\n if ('ink' in navigator && 'requestPresenter' in navigator.ink) {\n this.supportsInk = true;\n this.setupInkAPI();\n }\n }\n\n async setupInkAPI() {\n try {\n this.inkPresenter = await navigator.ink.requestPresenter({\n presentationArea: this.canvas\n });\n console.log('Ink API initialized successfully');\n } catch (error) {\n console.warn('Failed to initialize Ink API:', error);\n this.supportsInk = false;\n }\n }\n\n setupEventListeners() {\n // Pointer events (primary method)\n this.canvas.addEventListener('pointerdown', this.handlePointerDown.bind(this));\n this.canvas.addEventListener('pointermove', this.handlePointerMove.bind(this));\n this.canvas.addEventListener('pointerup', this.handlePointerUp.bind(this));\n this.canvas.addEventListener('pointerleave', this.handlePointerUp.bind(this));\n this.canvas.addEventListener('pointercancel', this.handlePointerUp.bind(this));\n\n // Touch events as fallback for better mobile support\n this.canvas.addEventListener('touchstart', this.handleTouchStart.bind(this), { passive: false });\n this.canvas.addEventListener('touchmove', this.handleTouchMove.bind(this), { passive: false });\n this.canvas.addEventListener('touchend', this.handleTouchEnd.bind(this), { passive: false });\n this.canvas.addEventListener('touchcancel', this.handleTouchEnd.bind(this), { passive: false });\n\n // Mouse events as additional fallback\n this.canvas.addEventListener('mousedown', this.handleMouseDown.bind(this));\n this.canvas.addEventListener('mousemove', this.handleMouseMove.bind(this));\n this.canvas.addEventListener('mouseup', this.handleMouseUp.bind(this));\n this.canvas.addEventListener('mouseleave', this.handleMouseUp.bind(this));\n\n // Keyboard support for accessibility\n this.canvas.addEventListener('keydown', this.handleKeyDown.bind(this));\n\n // Prevent context menu on right click\n this.canvas.addEventListener('contextmenu', e => e.preventDefault());\n }\n\n getCanvasCoordinates(clientX, clientY) {\n const rect = this.canvas.getBoundingClientRect();\n const scaleX = this.canvas.width / rect.width;\n const scaleY = this.canvas.height / rect.height;\n \n return {\n x: (clientX - rect.left) * scaleX,\n y: (clientY - rect.top) * scaleY\n };\n }\n\n handlePointerDown(e) {\n // Prevent other event handlers from firing\n e.preventDefault();\n \n this.isDrawing = true;\n this.lastPoint = this.getCanvasCoordinates(e.clientX, e.clientY);\n\n // Start path for Ink API if supported\n if (this.supportsInk && this.inkPresenter) {\n this.inkPresenter.updateInkTrailStartPoint(e, {\n color: this.ctx.strokeStyle,\n diameter: this.ctx.lineWidth\n });\n }\n\n // Set pointer capture for better tracking\n this.canvas.setPointerCapture(e.pointerId);\n }\n\n handlePointerMove(e) {\n if (!this.isDrawing) return;\n \n // Prevent other event handlers from firing\n e.preventDefault();\n\n const currentPoint = this.getCanvasCoordinates(e.clientX, e.clientY);\n this.drawLine(this.lastPoint, currentPoint);\n\n // Update Ink API if supported\n if (this.supportsInk && this.inkPresenter) {\n this.inkPresenter.updateInkTrailStartPoint(e, {\n color: this.ctx.strokeStyle,\n diameter: this.ctx.lineWidth\n });\n }\n\n this.lastPoint = currentPoint;\n }\n\n handlePointerUp(e) {\n if (!this.isDrawing) return;\n \n this.isDrawing = false;\n this.lastPoint = null;\n\n // Release pointer capture\n if (this.canvas.hasPointerCapture(e.pointerId)) {\n this.canvas.releasePointerCapture(e.pointerId);\n }\n\n // Dispatch custom event for drawing completion\n this.dispatchEvent(new CustomEvent('drawingComplete', {\n bubbles: true,\n detail: { canvas: this.canvas }\n }));\n }\n\n // Touch event handlers for better mobile support\n handleTouchStart(e) {\n e.preventDefault();\n \n if (e.touches.length === 1) {\n const touch = e.touches[0];\n this.isDrawing = true;\n this.lastPoint = this.getCanvasCoordinates(touch.clientX, touch.clientY);\n }\n }\n\n handleTouchMove(e) {\n e.preventDefault();\n \n if (!this.isDrawing || e.touches.length !== 1) return;\n\n const touch = e.touches[0];\n const currentPoint = this.getCanvasCoordinates(touch.clientX, touch.clientY);\n this.drawLine(this.lastPoint, currentPoint);\n this.lastPoint = currentPoint;\n }\n\n handleTouchEnd(e) {\n e.preventDefault();\n \n if (!this.isDrawing) return;\n \n this.isDrawing = false;\n this.lastPoint = null;\n\n // Dispatch custom event for drawing completion\n this.dispatchEvent(new CustomEvent('drawingComplete', {\n bubbles: true,\n detail: { canvas: this.canvas }\n }));\n }\n\n // Mouse event handlers as fallback\n handleMouseDown(e) {\n // Only handle if pointer events aren't supported\n if ('PointerEvent' in window) return;\n \n e.preventDefault();\n \n this.isDrawing = true;\n this.lastPoint = this.getCanvasCoordinates(e.clientX, e.clientY);\n }\n\n handleMouseMove(e) {\n // Only handle if pointer events aren't supported\n if ('PointerEvent' in window || !this.isDrawing) return;\n \n e.preventDefault();\n\n const currentPoint = this.getCanvasCoordinates(e.clientX, e.clientY);\n this.drawLine(this.lastPoint, currentPoint);\n this.lastPoint = currentPoint;\n }\n\n handleMouseUp(e) {\n // Only handle if pointer events aren't supported\n if ('PointerEvent' in window || !this.isDrawing) return;\n \n this.isDrawing = false;\n this.lastPoint = null;\n\n // Dispatch custom event for drawing completion\n this.dispatchEvent(new CustomEvent('drawingComplete', {\n bubbles: true,\n detail: { canvas: this.canvas }\n }));\n }\n\n drawLine(fromPoint, toPoint) {\n this.ctx.beginPath();\n this.ctx.moveTo(fromPoint.x, fromPoint.y);\n this.ctx.lineTo(toPoint.x, toPoint.y);\n this.ctx.stroke();\n }\n\n handleKeyDown(e) {\n // Keyboard shortcuts for accessibility\n switch (e.key) {\n case 'Delete':\n case 'Backspace':\n this.clear();\n e.preventDefault();\n break;\n case 'Enter':\n case ' ':\n // Trigger generate if available\n const generateBtn = document.querySelector('#generateButton');\n if (generateBtn && !generateBtn.disabled) {\n generateBtn.click();\n }\n e.preventDefault();\n break;\n }\n }\n\n clear() {\n this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);\n \n // Dispatch clear event\n this.dispatchEvent(new CustomEvent('canvasCleared', {\n bubbles: true\n }));\n }\n\n getImageData() {\n // Create a temporary canvas with white background for AI processing\n const tempCanvas = document.createElement('canvas');\n tempCanvas.width = this.canvas.width;\n tempCanvas.height = this.canvas.height;\n const tempCtx = tempCanvas.getContext('2d');\n \n // Fill with white background\n tempCtx.fillStyle = '#ffffff';\n tempCtx.fillRect(0, 0, tempCanvas.width, tempCanvas.height);\n \n // Draw the user's sketch on top\n tempCtx.drawImage(this.canvas, 0, 0);\n \n return tempCanvas.toDataURL('image/png');\n }\n\n isEmpty() {\n // Check if canvas is empty (all transparent pixels)\n const imageData = this.ctx.getImageData(0, 0, this.canvas.width, this.canvas.height);\n const data = imageData.data;\n \n for (let i = 3; i < data.length; i += 4) {\n // Check alpha channel - if any pixel has alpha > 0, canvas is not empty\n if (data[i] > 0) {\n return false;\n }\n }\n return true;\n }\n\n setBackgroundImage(imageSrc) {\n if (this.container) {\n this.container.style.backgroundImage = `url(${imageSrc})`;\n this.container.style.backgroundSize = `${this.canvasSize}px ${this.canvasSize}px`;\n this.container.style.backgroundRepeat = 'no-repeat';\n this.container.style.backgroundPosition = 'center';\n }\n }\n\n clearBackgroundImage() {\n if (this.container) {\n this.container.style.backgroundImage = 'none';\n }\n }\n\n setOpacity(opacity) {\n this.canvasOpacity = opacity;\n if (this.canvas) {\n this.canvas.style.opacity = opacity;\n }\n }\n\n showGenerationState(isGenerating) {\n if (this.container && this.overlay) {\n if (isGenerating) {\n this.container.classList.add('generating');\n this.overlay.classList.add('active');\n } else {\n this.container.classList.remove('generating');\n this.overlay.classList.remove('active');\n }\n }\n }\n}\n\ncustomElements.define('drawing-canvas', DrawingCanvas);",[],[143,213,204],"components","e3f3d110-8399-11f0-912d-0224a6c84d84","control-panel.js","6c8b3996-8390-11f0-8935-0224a6c84d84",60,["D",1756335742602],"class ControlPanel extends HTMLElement {\n constructor() {\n super();\n this.drawingCanvas = null;\n this.currentRequestId = 0;\n this.isGenerating = false;\n this.showingAIOnly = false;\n this.generationTimeout = null;\n }\n\n connectedCallback() {\n this.setupEventListeners();\n this.findDrawingCanvas();\n }\n\n findDrawingCanvas() {\n this.drawingCanvas = document.querySelector(\"drawing-canvas\");\n\n if (this.drawingCanvas) {\n this.drawingCanvas.addEventListener(\n \"drawingComplete\",\n this.handleDrawingComplete.bind(this),\n );\n this.drawingCanvas.addEventListener(\n \"canvasCleared\",\n this.handleCanvasCleared.bind(this),\n );\n this.drawingCanvas.addEventListener(\n \"canvasSizeChanged\",\n this.handleCanvasSizeChanged.bind(this),\n );\n }\n }\n\n setupEventListeners() {\n // Canvas size selector\n const canvasSizeSelect = document.getElementById(\"canvasSize\");\n if (canvasSizeSelect) {\n canvasSizeSelect.addEventListener(\"change\", (e) => {\n if (this.drawingCanvas) {\n this.drawingCanvas.setCanvasSize(e.target.value);\n }\n });\n }\n\n // Control buttons\n const clearButton = document.getElementById(\"clearButton\");\n const toggleViewButton = document.getElementById(\"toggleViewButton\");\n const saveButton = document.getElementById(\"saveButton\");\n\n if (clearButton) {\n clearButton.addEventListener(\"click\", this.handleClear.bind(this));\n }\n\n if (toggleViewButton) {\n toggleViewButton.addEventListener(\n \"click\",\n this.handleToggleView.bind(this),\n );\n }\n\n if (saveButton) {\n saveButton.addEventListener(\"click\", this.handleSave.bind(this));\n }\n\n this.updateButtonStates();\n }\n\n handleClear() {\n if (this.drawingCanvas) {\n this.drawingCanvas.clear();\n }\n\n if (this.generationTimeout) {\n clearTimeout(this.generationTimeout);\n this.generationTimeout = null;\n }\n\n this.currentRequestId++;\n this.hideGeneratedImage();\n }\n\n handleToggleView() {\n this.showingAIOnly = !this.showingAIOnly;\n const toggleButton = document.getElementById(\"toggleViewButton\");\n\n if (this.drawingCanvas) {\n if (this.showingAIOnly) {\n this.drawingCanvas.setOpacity(0);\n toggleButton.textContent = \"Show Sketch\";\n } else {\n this.drawingCanvas.setOpacity(0.7);\n toggleButton.textContent = \"Show AI Only\";\n }\n }\n }\n\n handleSave() {\n // Get the current background image and save it\n if (this.drawingCanvas && this.drawingCanvas.container) {\n const bgImage = this.drawingCanvas.container.style.backgroundImage;\n if (bgImage && bgImage !== \"none\") {\n const imageUrl = bgImage.slice(5, -2); // Remove 'url(\"' and '\")'\n this.saveImage(imageUrl);\n }\n }\n }\n\n handleDrawingComplete() {\n if (this.generationTimeout) {\n clearTimeout(this.generationTimeout);\n }\n\n this.generationTimeout = setTimeout(() => {\n this.handleGenerate();\n }, 1000);\n }\n\n handleCanvasCleared() {\n this.hideGeneratedImage();\n this.updateButtonStates();\n }\n\n handleCanvasSizeChanged() {\n // Clear any existing background when size changes\n this.hideGeneratedImage();\n this.updateButtonStates();\n }\n\n async handleGenerate() {\n if (!this.drawingCanvas || this.drawingCanvas.isEmpty()) {\n return;\n }\n\n const requestId = ++this.currentRequestId;\n\n try {\n this.isGenerating = true;\n this.showLoadingIndicator(true);\n this.updateButtonStates();\n \n // Show subtle generation state on canvas\n if (this.drawingCanvas) {\n this.drawingCanvas.showGenerationState(true);\n }\n\n const imageData = this.drawingCanvas.getImageData();\n\n const response = await fetch(\"/api/generate\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ imageData }),\n });\n\n if (requestId !== this.currentRequestId) {\n return; // Outdated request\n }\n\n if (!response.ok) {\n const errorData = await response.json();\n throw new Error(errorData.error || `HTTP ${response.status}`);\n }\n\n const data = await response.json();\n\n if (!data.result || !data.result.inlineData) {\n throw new Error(\"Invalid response format from AI service\");\n }\n\n if (requestId === this.currentRequestId) {\n this.displayGeneratedImage(data.result.inlineData);\n }\n } catch (error) {\n if (requestId === this.currentRequestId) {\n console.error(\"Generation error:\", error);\n this.showError(`Failed to generate image: ${error.message}`);\n }\n } finally {\n if (requestId === this.currentRequestId) {\n this.isGenerating = false;\n this.showLoadingIndicator(false);\n this.updateButtonStates();\n \n // Hide generation state on canvas\n if (this.drawingCanvas) {\n this.drawingCanvas.showGenerationState(false);\n }\n }\n }\n }\n\n displayGeneratedImage(inlineData) {\n if (this.drawingCanvas) {\n this.drawingCanvas.setBackgroundImage(\n `data:${inlineData.mimeType};base64,${inlineData.data}`,\n );\n }\n\n const saveButton = document.getElementById(\"saveButton\");\n if (saveButton) {\n saveButton.classList.remove(\"hidden\");\n }\n\n this.dispatchEvent(\n new CustomEvent(\"imageGenerated\", {\n bubbles: true,\n detail: { imageData: inlineData },\n }),\n );\n }\n\n hideGeneratedImage() {\n if (this.drawingCanvas) {\n this.drawingCanvas.clearBackgroundImage();\n }\n\n const saveButton = document.getElementById(\"saveButton\");\n if (saveButton) {\n saveButton.classList.add(\"hidden\");\n }\n }\n\n updateButtonStates() {\n const clearButton = document.getElementById(\"clearButton\");\n const toggleViewButton = document.getElementById(\"toggleViewButton\");\n\n if (!this.drawingCanvas) return;\n\n const isEmpty = this.drawingCanvas.isEmpty();\n\n if (clearButton) {\n clearButton.disabled = isEmpty && !this.isGenerating;\n }\n\n if (toggleViewButton) {\n toggleViewButton.disabled = isEmpty;\n }\n }\n\n showLoadingIndicator(show) {\n const indicator = document.getElementById(\"loadingIndicator\");\n if (indicator) {\n if (show) {\n indicator.classList.remove(\"hidden\");\n } else {\n indicator.classList.add(\"hidden\");\n }\n }\n }\n\n async saveImage(imageSrc) {\n try {\n if (\"showSaveFilePicker\" in window) {\n const fileHandle = await window.showSaveFilePicker({\n suggestedName: `trace-ai-${Date.now()}.png`,\n types: [{\n description: \"PNG Images\",\n accept: { \"image/png\": [\".png\"] },\n }],\n });\n\n const response = await fetch(imageSrc);\n const blob = await response.blob();\n\n const writable = await fileHandle.createWritable();\n await writable.write(blob);\n await writable.close();\n } else {\n const link = document.createElement(\"a\");\n link.href = imageSrc;\n link.download = `trace-ai-${Date.now()}.png`;\n document.body.appendChild(link);\n link.click();\n document.body.removeChild(link);\n }\n } catch (error) {\n if (error.name !== \"AbortError\") {\n console.error(\"Save error:\", error);\n }\n }\n }\n\n showError(message) {\n const indicator = document.getElementById(\"loadingIndicator\");\n if (indicator) {\n indicator.innerHTML = `\n

\n Error: ${message}\n

\n `;\n indicator.classList.remove(\"hidden\");\n\n setTimeout(() => {\n indicator.classList.add(\"hidden\");\n indicator.innerHTML = `\n

\n Generating...\n

\n `;\n }, 3000);\n }\n }\n}\n\ncustomElements.define(\"control-panel\", ControlPanel);",[],[143,213,215],"5bd0c210-8390-11f0-ba68-0224a6c84d84",5,["D",1756331648731],[170,171],[143,213],["D",1756331615801],[169,172,173,174],[143],"fde44c96-839c-11f0-a90b-0224a6c84d84","index.ts",78,["D",1756337074598],20,"http","import { Hono } from \"https://esm.sh/hono@4.0.10\";\nimport { Content, GoogleGenAI, Modality } from \"https://esm.sh/@google/genai\";\n\nimport {\n readFile,\n serveFile,\n} from \"https://esm.town/v/std/utils@85-main/index.ts\";\n\nconst app = new Hono();\n\n// Unwrap Hono errors to see original error details\napp.onError((err) => Promise.reject(err));\n\n// Basic Auth middleware\nconst basicAuth = async (c, next) => {\n const authHeader = c.req.header('Authorization');\n \n if (!authHeader || !authHeader.startsWith('Basic ')) {\n return c.text('Unauthorized', 401, {\n 'WWW-Authenticate': 'Basic realm=\"Trace AI\"'\n });\n }\n\n const base64Credentials = authHeader.slice(6); // Remove 'Basic ' prefix\n const credentials = atob(base64Credentials);\n const [username, password] = credentials.split(':');\n\n const expectedUsername = Deno.env.get('BASIC_AUTH_USERNAME');\n const expectedPassword = Deno.env.get('BASIC_AUTH_PASSWORD');\n\n if (!expectedUsername || !expectedPassword) {\n console.error('Basic Auth environment variables not set');\n return c.text('Server configuration error', 500);\n }\n\n if (username !== expectedUsername || password !== expectedPassword) {\n return c.text('Unauthorized', 401, {\n 'WWW-Authenticate': 'Basic realm=\"Trace AI\"'\n });\n }\n\n await next();\n};\n\n// Initialize Gemini AI\nconst ai = new GoogleGenAI({ apiKey: Deno.env.get(\"GEMINI_API_KEY\") || \"\" });\n\n// Serve frontend files (with auth)\napp.get(\"/frontend/*\", basicAuth, (c) => serveFile(c.req.path, import.meta.url));\n\n// Serve the main page (with auth)\napp.get(\"/\", basicAuth, async (c) => {\n const html = await readFile(\"/frontend/index.html\", import.meta.url);\n return c.html(html);\n});\n\n// API endpoint for AI image generation (with auth)\napp.post(\"/api/generate\", basicAuth, async (c) => {\n try {\n const { imageData } = await c.req.json();\n\n if (!imageData || !imageData.startsWith(\"data:image/png;base64,\")) {\n return c.json({ error: \"Invalid imageData format\" }, 400);\n }\n\n const selectedModel = \"gemini-2.5-flash-image-preview\";\n const prompt = `\nThe user has given you a sketch to fill in with a playful, colorful, and high-quality artistic image. Trace these lines, keeping the scale as close as possible to the original image and transform the picture into a rich, detailed artwork. Be creative and add vibrant colors, textures, and details that bring the drawing to life. \n \nThe image MUST match the line drawing.`;\n\n const imagePart = {\n inlineData: {\n data: imageData.split(\",\")[1], // Remove the data URI prefix\n mimeType: \"image/png\",\n },\n };\n\n let contents: Content[] = [\n {\n role: \"USER\",\n parts: [\n {\n text: prompt,\n },\n ],\n },\n ];\n\n if (imagePart) {\n contents = [\n {\n role: \"USER\",\n parts: [imagePart],\n },\n {\n role: \"USER\",\n parts: [\n {\n text: `${prompt}`,\n },\n ],\n },\n ];\n }\n\n const response = await ai.models.generateContent({\n model: selectedModel,\n contents,\n config: {\n responseModalities: [Modality.TEXT, Modality.IMAGE],\n },\n });\n\n if (!response.candidates || response.candidates.length === 0) {\n throw new Error(\"No candidates returned from AI model\");\n }\n\n const candidate = response.candidates[0];\n if (\n !candidate.content || !candidate.content.parts ||\n candidate.content.parts.length === 0\n ) {\n throw new Error(\"No content parts in AI response\");\n }\n\n const aiImageResponse = candidate.content.parts[0];\n\n return c.json({ result: aiImageResponse });\n } catch (error) {\n console.error(\"Error in AI image generation:\", error);\n return c.json(\n { error: \"Failed to generate image\", details: error.message },\n 500,\n );\n }\n});\n\n// Health check endpoint\napp.get(\"/api/health\", (c) => {\n return c.json({ status: \"ok\", timestamp: new Date().toISOString() });\n});\n\nexport default app.fetch;",[],[151,231],["D",1756331597912],[167],[151],["D",1756331168191],{"_97":96,"_105":101},{"_97":96,"_98":99,"_100":101,"_18":55,"_102":103,"_104":25},{"_13":86,"_32":87,"_43":42,"_88":44,"_89":-5,"_90":-5,"_91":-5,"_92":-5,"_93":-5,"_94":45,"_95":96},"ctx",{"_79":-5,"_125":279,"_280":281,"_282":283,"_284":25,"_285":25,"_286":25,"_287":59,"_288":-5,"_289":-7,"_290":-7,"_291":147,"_292":25,"_293":25,"_294":-5,"_295":25,"_296":25,"_297":25,"_298":-5},"ENV",{"_250":251,"_252":253,"_254":87,"_255":256,"_257":258,"_259":260,"_261":262,"_263":264,"_265":266,"_267":268,"_269":270,"_271":272,"_273":274,"_275":276,"_277":278},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e8c4b7030cb7600e4eb0736b15f422c8b8bd130f","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Diff · v85