paint-ui/types/selection.ts

export type SelectionType = 'rectangular' | 'elliptical' | 'lasso' | 'magic-wand';

export type SelectionMode = 'new' | 'add' | 'subtract' | 'intersect';

export interface SelectionBounds {
  x: number;
  y: number;
  width: number;
  height: number;
}

/**
 * Selection mask is a 2D boolean array representing selected pixels
 * true = selected, false = not selected
 */
export interface SelectionMask {
  width: number;
  height: number;
  data: Uint8Array; // 1 byte per pixel (0 = not selected, 255 = selected)
  bounds: SelectionBounds;
}

export interface Selection {
  id: string;
  layerId: string;
  mask: SelectionMask;
  inverted: boolean;
  feather: number; // Feather radius in pixels
  createdAt: number;
}

export interface SelectionState {
  activeSelection: Selection | null;
  selectionType: SelectionType;
  selectionMode: SelectionMode;
  feather: number;
  tolerance: number; // For magic wand (0-255)
  isMarching: boolean; // Marching ants animation
}

/**
 * Point for lasso selection
 */
export interface LassoPoint {
  x: number;
  y: number;
}