openapi: 3.1.0
info:
  title: Microsoft Windows 10 Windows Background Tasks Accelerometer Animations API
  description: API for running code in the background when an application is suspended or not running. Based on the Windows.ApplicationModel.Background namespace, it supports time-triggered, system-triggered, and maintenance-triggered background tasks. Key classes include BackgroundTaskBuilder, BackgroundTaskRegistration, SystemTrigger, TimeTrigger, and BackgroundTaskCompletedEventArgs.
  version: 1.0.0
  contact:
    name: Microsoft Developer Support
    url: https://learn.microsoft.com/en-us/windows/apps/windows-app-sdk/applifecycle/background-tasks
  license:
    name: Microsoft Software License
    url: https://www.microsoft.com/en-us/legal/terms-of-use
servers:
- url: https://api.windows.com
  description: Windows Platform API
tags:
- name: Animations
paths:
  /composition/animations:
    post:
      operationId: createAnimation
      summary: Microsoft Windows 10 Create a composition animation
      description: Creates a composition animation using Compositor factory methods such as CreateScalarKeyFrameAnimation, CreateVector3KeyFrameAnimation, CreateColorKeyFrameAnimation, or CreateExpressionAnimation. Animations drive property changes on visuals over time with easing functions.
      tags:
      - Animations
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateAnimationRequest'
      responses:
        '201':
          description: Animation created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CompositionAnimation'
        '400':
          description: Invalid animation parameters
components:
  schemas:
    CreateAnimationRequest:
      type: object
      properties:
        type:
          type: string
          enum:
          - ScalarKeyFrame
          - Vector2KeyFrame
          - Vector3KeyFrame
          - ColorKeyFrame
          - QuaternionKeyFrame
          - Expression
        duration:
          type: string
          description: ISO 8601 duration
        targetProperty:
          type: string
          description: Target property name (e.g., Offset, Opacity, Scale)
        keyFrames:
          type: array
          items:
            type: object
            properties:
              normalizedProgressKey:
                type: number
                format: float
                description: Progress key (0.0 to 1.0)
              value:
                type: object
                description: Value at this key frame
              easingFunction:
                type: string
                enum:
                - Linear
                - CubicBezier
                - StepEasing
        expression:
          type: string
          description: Expression string (for Expression animations)
      required:
      - type
    CompositionAnimation:
      type: object
      description: A composition animation
      properties:
        id:
          type: string
        type:
          type: string
          enum:
          - ScalarKeyFrame
          - Vector2KeyFrame
          - Vector3KeyFrame
          - ColorKeyFrame
          - QuaternionKeyFrame
          - Expression
          description: Animation type
        duration:
          type: string
          description: ISO 8601 duration
        iterationBehavior:
          type: string
          enum:
          - Count
          - Forever
        targetProperty:
          type: string
          description: Property being animated
externalDocs:
  description: Background Tasks Documentation
  url: https://learn.microsoft.com/en-us/windows/apps/windows-app-sdk/applifecycle/background-tasks