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paint-ui/IMPLEMENTATION_PLAN.md
Sebastian Krüger 517f57126a docs: update implementation plan with completed features 
Updated status to reflect all recently completed work:

Phase 10 (UI/UX Polish) - Complete:
- ✅ Accessibility (ARIA labels, keyboard nav, focus indicators)
- ✅ UI Components (context menus, toasts, loading states)
- ✅ Performance (lazy loading, code splitting, Web Workers)

Phase 11 (Advanced Features) - Complete:
- ✅ Advanced Brush Tools (Clone Stamp, Smudge, Dodge/Burn)

Progress: 95% of MVP features complete
Remaining: Testing & Documentation (Phase 12), Optional enhancements

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-21 16:37:31 +01:00

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# Paint UI - Implementation Plan
## 📊 Current Status
**Progress**: Phases 1-11 Complete + Performance & Accessibility (95% of MVP features) ✅
### ✅ Completed Features
- **Core Foundation**: Next.js 16, React 19, TypeScript, Tailwind CSS 4
- **Canvas Engine**: Multi-layer system with zoom/pan, rulers, blend modes
- **Undo/Redo**: Command pattern with full history support
- **Drawing Tools**: Pencil, Brush (with flow/hardness), Eraser, Fill, Eyedropper
- **Advanced Brush Tools**: Clone Stamp, Smudge, Dodge/Burn (with Alt key modifiers)
- **Selection Tools**: Rectangle, Ellipse, Lasso, Magic Wand with full operations
- **Transform Tools**: Move, Free Transform, Rotate, Scale, Skew
- **Shape Tools**: Rectangle, Ellipse, Line, Arrow, Polygon, Star, Triangle
- **Text Tool**: On-canvas editing, 16 fonts, Bold/Italic, Alignment, Line height, Letter spacing, Delete
- **Color System**: HSV picker, swatches, history, color adjustments
- **File Operations**: Open (drag/drop/paste), Export (PNG/JPG/WEBP), Project files
- **Effects & Filters**: 15+ filters (Blur, Sharpen, Color adjustments, Artistic effects) with Web Worker support
- **UI/UX**: Professional layout, Theme toggle, State persistence, Custom scrollbars
- **Performance**: Web Workers for heavy filters, Code splitting for tools, Lazy loading, Dirty rect infrastructure
- **Accessibility**: ARIA labels, Keyboard shortcuts (1-0 for tools), Focus indicators, Context menus, Toast notifications
- **UX Enhancements**: Loading overlays, Right-click context menus, Toast notification system
### 🚧 In Progress / TODO
- **Testing & Documentation** (Phase 12)
- **Web Font Integration** (Google Fonts for text tool) - Optional enhancement
- **Touch Support** (Mobile optimization) - Optional enhancement
### 📅 Last Updated
November 21, 2025 - Completed Advanced Brush Tools + Performance Optimizations + Accessibility Improvements
---
## Project Overview
**paint-ui** is a modern browser-based image editor built with Next.js 16 and Tailwind CSS 4, inspired by miniPaint. This is a ground-up rebuild focusing on modern web technologies while preserving the powerful canvas manipulation capabilities.
## Technology Stack
### Core Framework
- **Next.js 16** (App Router) - React framework with SSR/SSG capabilities
- **React 19** - UI library with modern hooks and server components
- **TypeScript 5.x** - Type safety and better DX
### Styling
- **Tailwind CSS 4** - Utility-first CSS framework
- **Radix UI** or **Shadcn/ui** - Accessible component primitives
- **CSS Modules** - For canvas-specific styling needs
### State Management
- **Zustand** - Lightweight state management for layers, history, and canvas state
- **React Context** - Global app configuration and theme
### Canvas & Image Processing
- **HTML5 Canvas API** - Core rendering
- **OffscreenCanvas** - Performance optimization
- **Web Workers** - Heavy image processing operations
- **pica** - High-quality image resizing
- **gif.js** - Animated GIF support
- **exif-js** - EXIF data handling
### Utilities
- **uuid** - Layer ID generation
- **file-saver** - File downloads
- **clsx** / **tailwind-merge** - Class name utilities
## Architecture
### Directory Structure
```
paint-ui/
├── src/
│ ├── app/ # Next.js App Router
│ │ ├── layout.tsx # Root layout
│ │ ├── page.tsx # Main editor page
│ │ └── globals.css # Global styles + Tailwind
│ │
│ ├── components/ # React components
│ │ ├── ui/ # Shadcn/Radix components
│ │ │ ├── button.tsx
│ │ │ ├── dialog.tsx
│ │ │ ├── dropdown-menu.tsx
│ │ │ ├── slider.tsx
│ │ │ ├── tabs.tsx
│ │ │ └── ...
│ │ │
│ │ ├── editor/ # Editor-specific components
│ │ │ ├── canvas-wrapper.tsx # Main canvas component
│ │ │ ├── toolbar.tsx # Top toolbar
│ │ │ ├── tool-palette.tsx # Left sidebar tools
│ │ │ ├── layers-panel.tsx # Right sidebar layers
│ │ │ ├── properties-panel.tsx # Layer properties
│ │ │ ├── color-picker.tsx # Color selection
│ │ │ └── preview.tsx # Preview panel
│ │ │
│ │ └── modals/ # Modal dialogs
│ │ ├── new-image.tsx
│ │ ├── resize.tsx
│ │ ├── export.tsx
│ │ └── settings.tsx
│ │
│ ├── core/ # Core canvas engine
│ │ ├── canvas-manager.ts # Canvas lifecycle management
│ │ ├── layer-manager.ts # Layer operations
│ │ ├── history-manager.ts # Undo/redo system
│ │ ├── selection-manager.ts # Selection handling
│ │ └── render-engine.ts # Rendering pipeline
│ │
│ ├── tools/ # Drawing tools
│ │ ├── base-tool.ts # Abstract base class
│ │ ├── pencil.ts
│ │ ├── brush.ts
│ │ ├── eraser.ts
│ │ ├── fill.ts
│ │ ├── select.ts
│ │ ├── text.ts
│ │ ├── shape.ts
│ │ └── ...
│ │
│ ├── effects/ # Image effects/filters
│ │ ├── base-effect.ts
│ │ ├── blur.ts
│ │ ├── brightness.ts
│ │ ├── contrast.ts
│ │ ├── grayscale.ts
│ │ └── ...
│ │
│ ├── store/ # Zustand stores
│ │ ├── canvas-store.ts # Canvas state
│ │ ├── layer-store.ts # Layers state
│ │ ├── history-store.ts # Undo/redo state
│ │ ├── tool-store.ts # Active tool state
│ │ └── ui-store.ts # UI state (panels, modals)
│ │
│ ├── workers/ # Web Workers
│ │ ├── image-processor.worker.ts
│ │ └── gif-generator.worker.ts
│ │
│ ├── lib/ # Utility functions
│ │ ├── canvas-utils.ts
│ │ ├── color-utils.ts
│ │ ├── file-utils.ts
│ │ ├── image-utils.ts
│ │ └── math-utils.ts
│ │
│ ├── types/ # TypeScript types
│ │ ├── canvas.ts
│ │ ├── layer.ts
│ │ ├── tool.ts
│ │ ├── effect.ts
│ │ └── index.ts
│ │
│ └── config/ # Configuration
│ ├── constants.ts
│ ├── keyboard-shortcuts.ts
│ └── default-settings.ts
│
├── public/ # Static assets
│ ├── icons/
│ └── fonts/
│
├── docs/ # Documentation
│ ├── architecture.md
│ ├── contributing.md
│ └── api.md
│
├── .github/
│ └── workflows/
│ └── ci.yml
│
├── package.json
├── tsconfig.json
├── tailwind.config.ts
├── next.config.js
├── .gitignore
├── .eslintrc.json
├── .prettierrc
└── README.md
```
## Implementation Phases
### Phase 1: Project Foundation (Week 1) ✅ COMPLETE
**Goals**: Set up development environment and basic project structure
#### Tasks:
1. **Project Initialization**
- [x] Create git repository
- [x] Initialize Next.js 16 with TypeScript
- [x] Configure Tailwind CSS 4
- [x] Set up ESLint + Prettier
- [x] Configure path aliases (@/ prefix)
2. **Core Dependencies**
- [x] Install Radix UI / Shadcn components
- [x] Install Zustand for state management
- [x] Install canvas utilities (pica, file-saver, etc.)
- [ ] Set up Storybook (optional, for component development) - SKIPPED
3. **Basic Layout**
- [x] Create root layout with header/sidebar structure
- [x] Implement responsive grid layout
- [x] Add dark/light theme toggle
- [x] Set up global CSS and Tailwind theme
4. **TypeScript Types**
- [x] Define core types (Layer, Canvas, Tool, Effect)
- [x] Create type definitions for canvas state
- [x] Set up strict TypeScript config
**Deliverables**:
- ✅ Working Next.js dev server
- ✅ Basic UI layout with panels
- ✅ Theme system working
- ✅ Type system foundation
---
### Phase 2: Core Canvas Engine (Week 2-3) ✅ COMPLETE
**Goals**: Build the fundamental canvas rendering and layer system
#### Tasks:
1. **Canvas Manager**
- [x] Create CanvasWrapper component with refs
- [x] Implement canvas initialization
- [x] Add zoom/pan functionality
- [x] Implement rulers and grid overlay
- [x] Handle canvas resize events
2. **Layer System**
- [x] Define Layer interface (id, name, visible, opacity, blendMode)
- [x] Create LayerManager class
- [x] Implement layer CRUD operations
- [x] Add layer ordering (move up/down)
- [x] Implement layer merging/flattening
3. **State Management**
- [x] Set up canvas-store (dimensions, zoom, offset)
- [x] Set up layer-store (layers array, active layer)
- [x] Create selectors for derived state
- [x] Add state persistence (localStorage) - via Zustand persist
4. **Rendering Pipeline**
- [x] Implement composite rendering (all layers → main canvas)
- [x] Add blend mode support
- [ ] Optimize rendering with dirty rectangles - TODO: Performance optimization
- [x] Implement preview rendering
**Deliverables**:
- ✅ Canvas displays correctly
- ✅ Can create/delete/reorder layers
- ✅ Zoom/pan works smoothly
- ✅ State persists on refresh
---
### Phase 3: History & Undo System (Week 3-4) ✅ COMPLETE
**Goals**: Implement robust undo/redo functionality
#### Tasks:
1. **History Manager**
- [x] Design history state structure (snapshots vs commands) - Command pattern
- [x] Implement undo/redo stack
- [x] Add history limits (max 50 states)
- [x] Create history middleware for Zustand
2. **Command Pattern**
- [x] Create abstract Command class (BaseCommand)
- [x] Implement layer commands (Add, Delete, Modify)
- [x] Implement drawing commands (Paint, Erase, Fill) - DrawCommand
- [x] Implement move commands - MoveCommand
- [x] Implement transform commands - TransformCommand
- [x] Implement filter commands - FilterCommand
- [ ] Add command batching for performance - TODO: Future optimization
3. **Keyboard Shortcuts**
- [x] Implement Ctrl+Z (undo)
- [x] Implement Ctrl+Shift+Z (redo)
- [x] Add keyboard shortcut manager
- [x] Create shortcuts config file
**Deliverables**:
- ✅ Undo/redo works for all operations
- ✅ Keyboard shortcuts functional
- ✅ History panel shows operation list
---
### Phase 4: Basic Drawing Tools (Week 4-6) ✅ COMPLETE
**Goals**: Implement fundamental drawing capabilities
#### Tasks:
1. **Tool Architecture**
- [x] Create BaseTool abstract class
- [x] Define tool lifecycle (activate, deactivate, mouseDown, mouseMove, mouseUp)
- [x] Implement tool cursor management
- [x] Add tool settings panel (tool-options bar)
2. **Core Tools**
- [x] **Pencil Tool** - Basic 1px drawing
- [x] **Brush Tool** - Variable size/opacity/hardness/flow
- [x] **Eraser Tool** - Remove pixels
- [x] **Fill Tool** - Flood fill algorithm with color/opacity
- [x] **Eyedropper Tool** - Color picker from canvas
3. **Selection Tools**
- [x] **Rectangle Select** - Rectangular selection
- [x] **Ellipse Select** - Circular selection
- [x] **Lasso Select** - Freehand selection
- [x] **Magic Wand** - Color-based selection
- [x] Selection operations (move, cut, copy, paste, fill, stroke, delete)
4. **Tool UI**
- [x] Tool palette sidebar
- [x] Tool-specific settings panel
- [x] Brush preview
- [x] Size/opacity/hardness/flow sliders
**Deliverables**:
- ✅ Can draw with pencil/brush
- ✅ Can erase pixels
- ✅ Can fill areas with color
- ✅ Can select and manipulate regions
---
### Phase 5: Color System (Week 6-7) ✅ COMPLETE
**Goals**: Comprehensive color management
#### Tasks:
1. **Color Picker**
- [x] HSV color wheel component
- [x] RGB/HSL/Hex input fields
- [x] Color history/swatches
- [x] Eyedropper integration
- [x] Alpha/opacity control
2. **Color Management**
- [x] Primary/secondary color state
- [x] Color palette presets
- [x] Recent colors storage
- [x] Color conversion utilities
- [x] Color adjustments (Hue/Saturation/Lightness/Brightness)
**Deliverables**:
- ✅ Functional color picker
- ✅ Color swatches working
- ✅ Color history persists
---
### Phase 6: File Operations (Week 7-8) ✅ COMPLETE
**Goals**: Import/export image files
#### Tasks:
1. **File Opening**
- [x] Drag & drop support
- [x] File input dialog
- [x] Clipboard paste (Ctrl+V)
- [ ] URL loading - TODO: Future enhancement
- [x] Multiple file formats (PNG, JPG, WEBP, GIF)
2. **File Saving**
- [x] Export as PNG/JPG/WEBP
- [x] Quality settings for lossy formats
- [x] Transparent background support
- [x] Export current layer vs all layers
3. **Project Files**
- [x] Save/load project as JSON (with layers)
- [x] Preserve layer structure
- [x] Include metadata
4. **EXIF Support**
- [ ] Read EXIF data on import - TODO: Future enhancement
- [ ] Display EXIF info - TODO: Future enhancement
- [ ] Preserve EXIF on export (optional) - TODO: Future enhancement
**Deliverables**:
- ✅ Can open images via drag/drop/paste
- ✅ Can export to common formats
- ✅ Can save/load projects with layers
---
### Phase 7: Image Effects & Filters (Week 8-10) ✅ COMPLETE
**Goals**: Implement image manipulation effects
#### Tasks:
1. **Effect Architecture**
- [x] Create BaseEffect class
- [x] Implement effect preview system
- [ ] Add Web Worker support for heavy effects - TODO: Performance optimization
- [x] Create effect parameter UI (FilterDialog)
2. **Color Adjustments**
- [x] Brightness/Contrast
- [x] Hue/Saturation/Lightness
- [ ] Levels - TODO: Advanced feature
- [ ] Curves - TODO: Advanced feature
- [x] Auto color correction
- [x] Invert/Negative
3. **Blur Effects**
- [x] Gaussian Blur
- [x] Box Blur
- [ ] Motion Blur - TODO: Future enhancement
- [ ] Zoom Blur - TODO: Future enhancement
4. **Artistic Effects**
- [x] Grayscale
- [x] Sepia
- [ ] Oil Painting - TODO: Future enhancement
- [ ] Pencil Sketch - TODO: Future enhancement
- [ ] Mosaic - TODO: Future enhancement
- [x] Pixelate
5. **Distortion Effects**
- [ ] Bulge/Pinch - TODO: Future enhancement
- [ ] Swirl - TODO: Future enhancement
- [ ] Ripple - TODO: Future enhancement
6. **Other Effects**
- [x] Sharpen
- [x] Edge Detection
- [x] Emboss
- [x] Noise/Grain
- [x] Vignette
**Deliverables**:
- ✅ 15+ effects implemented (core set complete)
- ✅ Effect preview working
- ⚠️ Effects run in main thread (Worker optimization TODO)
---
### Phase 8: Advanced Tools (Week 10-12) ✅ COMPLETE
**Goals**: Implement advanced editing tools
#### Tasks:
1. **Text Tool** ✅ COMPLETE (Phase 11)
- [x] Text rendering on canvas (on-canvas editor with live preview)
- [x] Font family selection (16 system fonts)
- [x] Font size/style/weight (including Bold/Italic toggles)
- [x] Text color and opacity
- [x] Text alignment (Left/Center/Right buttons)
- [x] Line height control (slider 0.5-3.0)
- [x] Letter spacing control (slider -10px to 50px)
- [x] Text editing/repositioning (drag to move, click to re-edit)
- [x] Delete text functionality (Delete/Backspace on empty text)
- [ ] Web font loading (Google Fonts integration) - TODO: Enhancement
2. **Shape Tools** ✅ COMPLETE (Phase 10)
- [x] Rectangle (fill/stroke)
- [x] Ellipse (fill/stroke)
- [x] Line
- [x] Arrow
- [x] Polygon
- [x] Star
- [x] Triangle
3. **Advanced Tools** ✅ COMPLETE
- [x] Clone Stamp Tool (Alt+Click to set source)
- [ ] Healing Brush - TODO: Future enhancement
- [ ] Blur/Sharpen Tool (brush-based) - TODO: Future enhancement
- [x] Smudge Tool (blending and smearing)
- [x] Dodge/Burn (Alt to toggle between lighten/darken)
4. **Transform Tools** ✅ COMPLETE (Phase 9)
- [x] Free Transform
- [x] Rotate
- [x] Scale
- [x] Skew
- [ ] Perspective - TODO: Advanced feature
- [x] Move Tool
**Deliverables**:
- ✅ Text tool fully functional with comprehensive formatting
- ✅ Shape tools functional
- ✅ Transform operations smooth
---
### Phase 9: Image Manipulation (Week 12-13) ✅ COMPLETE (Integrated with Phase 8-9)
**Goals**: Advanced image operations
#### Tasks:
1. **Canvas Operations**
- [x] Resize canvas
- [x] Crop canvas
- [x] Rotate canvas (90°, 180°, 270°)
- [x] Flip horizontal/vertical
- [ ] Trim transparent pixels - TODO: Utility feature
2. **Image Resize**
- [x] Resize with quality options
- [x] Maintain aspect ratio
- [x] Hermite/Bicubic algorithms
- [x] Integration with pica library
3. **Layer Operations**
- [x] Merge layers
- [x] Flatten image
- [x] Duplicate layer
- [x] Layer from selection
**Deliverables**:
- ✅ All image operations working
- ✅ High-quality resize algorithm
- ✅ No quality loss on operations
---
### Phase 10: UI/UX Polish (Week 13-14) ✅ MOSTLY COMPLETE
**Goals**: Refine user interface and experience
#### Tasks:
1. **Responsive Design**
- [x] Mobile-friendly layout (professional editor layout)
- [ ] Touch support for tools - TODO: Mobile optimization
- [x] Collapsible panels (Resizable panels with state persistence)
- [x] Mobile menu
2. **Accessibility** ✅ COMPLETE
- [x] Keyboard navigation (Ctrl+Z, Ctrl+Shift+Z, 1-0 for tools, Arrow keys for layers, etc.)
- [x] ARIA labels (all interactive elements)
- [x] Focus management (focus indicators with :focus-visible)
- [x] Screen reader support (via ARIA labels and semantic HTML)
3. **UI Components** ✅ COMPLETE
- [x] Context menus (right-click on layers with viewport detection)
- [x] Tooltips (via Radix UI with keyboard shortcuts)
- [x] Notification system (toast notifications with 4 types)
- [x] Loading states (full-screen overlays with custom messages)
- [x] Error boundaries
4. **Performance** ✅ MOSTLY COMPLETE
- [x] Lazy load tools (dynamic imports with caching)
- [x] Code splitting (tool loader with preloading)
- [x] Web Workers for heavy filters (with smart routing)
- [x] Dirty rectangle infrastructure (ready for integration)
- [ ] Image optimization - TODO: Further optimization
- [ ] Bundle size analysis - TODO: Optimization
**Additional Features Implemented**:
- [x] Dark/Light theme toggle with persistence
- [x] UI state persistence (panel positions, tool selection)
- [x] Professional image editor layout structure
- [x] Tool options bar with context-sensitive controls
- [x] Transparent canvas background support
- [x] Custom scrollbar styling
**Deliverables**:
- ✅ Professional UI layout
- ✅ Accessibility improvements complete (ARIA, keyboard nav, focus)
- ✅ Performance optimizations (lazy loading, code splitting, Web Workers)
- ✅ Fast load times with Next.js 16
---
### Phase 11: Advanced Features (Week 14-16) ✅ TEXT TOOL COMPLETE
**Goals**: Nice-to-have features
#### Priority Tasks for Next Implementation:
1. **Text Tool** ✅ COMPLETE
- [x] Text rendering on canvas (Photoshop-style on-canvas editor)
- [x] Font family selection (16 system fonts)
- [x] Font size/style/weight (with Bold/Italic toggles)
- [x] Text color and opacity
- [x] Text alignment (Left/Center/Right buttons)
- [x] Line height control (0.5-3.0 range)
- [x] Letter spacing control (-10px to 50px)
- [x] Text editing/repositioning (click to edit, drag to move)
- [x] Delete functionality (Delete/Backspace on empty text)
- [ ] Web font loading (Google Fonts integration) - TODO: Enhancement
2. **Advanced Brush Tools** ✅ COMPLETE
- [x] Clone Stamp Tool (keyboard shortcut: 8)
- [ ] Healing Brush - TODO: Future enhancement
- [ ] Blur/Sharpen Tool (brush-based) - TODO: Future enhancement
- [x] Smudge Tool (keyboard shortcut: 9)
- [x] Dodge/Burn Tool (keyboard shortcut: 0, Alt to toggle)
3. **Animation Support** (Future)
- [ ] Frame timeline
- [ ] Frame duplication
- [ ] Onion skinning
- [ ] Export as GIF
- [ ] Export as APNG/WEBP animation
4. **Batch Operations** (Future)
- [ ] Apply effect to multiple layers
- [ ] Batch export
- [ ] Actions/macros recording
5. **Plugins/Extensions** (Future)
- [ ] Plugin API design
- [ ] Custom tool registration
- [ ] Custom effect registration
**Deliverables**:
- ✅ Text tool complete with professional features
- ✅ Advanced brush tools complete (Clone Stamp, Smudge, Dodge/Burn)
- ⏸️ Animation/batch/plugin features (nice-to-have, future)
---
### Phase 12: Testing & Documentation (Week 16-18) ⚠️ TODO
**Goals**: Ensure quality and maintainability
#### Tasks:
1. **Testing**
- [ ] Unit tests (Vitest) - Core utilities and commands
- [ ] Integration tests - Tool interactions
- [ ] E2E tests (Playwright) - Complete workflows
- [ ] Visual regression tests - UI consistency
2. **Documentation**
- [x] Implementation plan (this document)
- [ ] User documentation - How to use each tool
- [ ] API documentation - For developers
- [ ] Architecture guide - System design
- [ ] Contributing guide - For contributors
3. **CI/CD**
- [x] Docker configuration
- [ ] GitHub Actions setup
- [ ] Automated testing
- [ ] Build optimization
- [ ] Deployment pipeline
**Deliverables**:
- ⚠️ Testing framework TODO
- ⚠️ User documentation TODO
- ⚠️ Automated CI/CD TODO
---
## Performance Considerations
### Optimization Strategies
1. **Canvas Rendering**
- Use OffscreenCanvas for layer compositing
- Implement dirty rectangle optimization
- Debounce render calls during drawing
- Use requestAnimationFrame for smooth updates
2. **Web Workers**
- Offload heavy image processing to workers
- Use transferable objects for large image data
- Implement worker pool for parallel processing
3. **Memory Management**
- Limit undo history size
- Clear unused canvases
- Use image compression for layer storage
- Implement layer thumbnail caching
4. **Code Splitting**
- Lazy load tools on demand
- Dynamic imports for effects
- Separate chunks for large dependencies
## Compatibility
### Browser Support
- Chrome 100+
- Firefox 100+
- Safari 15+
- Edge 100+
### Required APIs
- Canvas 2D Context
- OffscreenCanvas
- Web Workers
- File API
- Clipboard API
## Success Metrics
### Performance Targets
- Initial load: <3 seconds
- Tool switch: <100ms
- Effect preview: <500ms
- Undo/redo: <50ms
### Quality Targets
- TypeScript: 100% coverage
- Test coverage: >80%
- Lighthouse score: >90
- Bundle size: <500KB (gzipped)
## Risk Mitigation
### Technical Risks
1. **Canvas Performance**: Use Web Workers and OffscreenCanvas
2. **Memory Leaks**: Implement proper cleanup in useEffect
3. **Browser Compatibility**: Polyfills and feature detection
4. **Large File Handling**: Stream processing and chunking
### Project Risks
1. **Scope Creep**: Stick to phased plan, MVP first
2. **Time Estimates**: Build in 20% buffer
3. **Dependency Issues**: Lock versions, test updates
## Future Enhancements
### Post-MVP Features
- [ ] Cloud storage integration
- [ ] Real-time collaboration
- [ ] AI-powered features (background removal, upscaling)
- [ ] Vector layer support
- [ ] 3D text rendering
- [ ] Advanced typography tools
- [ ] Print-ready export (CMYK support)
- [ ] Mobile native apps (React Native)
## Resources
### References
- miniPaint source: https://github.com/viliusle/miniPaint
- Next.js docs: https://nextjs.org/docs
- Tailwind CSS: https://tailwindcss.com
- Radix UI: https://radix-ui.com
- Canvas MDN: https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API
### Libraries to Evaluate
- **fabric.js** - Canvas object manipulation
- **konva.js** - 2D canvas framework
- **react-konva** - React wrapper for Konva
- **react-canvas-draw** - Drawing capabilities
---
## Getting Started
### Prerequisites
- Node.js 20+
- pnpm 9+
- Git
### Initial Setup
```bash
# Clone repository
git clone ssh://git@dev.pivoine.art:2222/valknar/paint-ui.git
cd paint-ui
# Install dependencies
pnpm install
# Run development server
pnpm dev
# Open http://localhost:3000
```
### Development Workflow
1. Create feature branch from `main`
2. Make changes with conventional commits
3. Write tests for new features
4. Run linter and tests locally
5. Push and create pull request
6. Review and merge
---
## Conclusion
This implementation plan provides a roadmap for building a modern, high-performance browser-based image editor. The phased approach ensures steady progress while maintaining quality and allowing for adjustments based on learnings along the way.
**Estimated Timeline**: 16-18 weeks for MVP
**Team Size**: 1-2 developers
**Complexity**: High (canvas manipulation, performance optimization)
The end result will be a powerful, user-friendly image editor that rivals desktop applications while running entirely in the browser.
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