autoshot 1.0.0

A device_preview plugin that automates generating App Store / Play Store screenshots across multiple devices, locales, and screens. Runs entirely in Flutter Web and outputs a downloadable ZIP archive.

Autoshot

A device_preview wrapper plugin that automates generating App Store / Play Store screenshots across multiple devices, locales, and screens — entirely from the Flutter Web runner.

autoshot wraps device_preview as a dependency, so you only need to add autoshot to your project — no need to depend on device_preview separately.

Problem

Developers currently have to manually switch devices and locales in device_preview and take screenshots one-by-one. For an app targeting 3 devices × 5 locales × 4 screens, that's 60 manual screenshots.

This plugin turns that into a single button click.

Features

• Single dependency: wraps device_preview — just add autoshot and you're set
• Matrix automation: iterates through every combination of screens × locales × devices
• Programmatic control: updates the DevicePreview state (device, locale) without user interaction
• Render-safe: waits for frames to settle after each state change before capturing
• Web-optimised: captures via RepaintBoundary → toImage() → PNG bytes
• ZIP download: bundles all screenshots into a single .zip and triggers a browser download
• Progress UI: shows a live progress bar in the device_preview toolbar
• Naming convention: device_name_locale_screen_name.png

Installation

dependencies:
  autoshot: ^1.0.0

Note: You do not need to add device_preview separately. It is re-exported by autoshot.

Quick Start

import 'package:autoshot/autoshot.dart';

Just wrap your app in Autoshot — that's it:

Autoshot(
  config: AutoshotConfig(
    screens: [
      ScreenEntry(name: 'home', builder: (_) => HomeScreen()),
      ScreenEntry(name: 'profile', builder: (_) => ProfileScreen()),
    ],
    locales: [Locale('en', 'US'), Locale('fr', 'FR'), Locale('ar')],
    devices: [
      Devices.ios.iPhone13ProMax,
      Devices.ios.iPadPro11Inches,
      Devices.android.samsungGalaxyS20,
    ],
    // Optional:
    theme: ThemeData.light(),
    darkTheme: ThemeData.dark(),
    localizationsDelegates: [...],
    settleDelay: Duration(milliseconds: 500),
  ),
  builder: (context) => MyApp(),
)

Autoshot internally creates a DevicePreview with the automation controller and toolbar already wired up. No manual setup needed.

Advanced: manual wiring

If you need full control (custom tool ordering, access to the controller, etc.), use the lower-level widgets directly:

final controller = AutoshotController();

DevicePreview(
  builder: (context) => AutoshotApp(
    controller: controller,
    child: MyApp(),
  ),
  tools: [
    ...DevicePreview.defaultTools,
    AutoshotToolbar(
      controller: controller,
      config: AutoshotConfig(
        screens: [
          ScreenEntry(name: 'home', builder: (_) => HomeScreen()),
          ScreenEntry(name: 'profile', builder: (_) => ProfileScreen()),
        ],
        locales: [Locale('en', 'US'), Locale('fr', 'FR'), Locale('ar')],
        devices: [
          Devices.ios.iPhone13ProMax,
          Devices.ios.iPadPro11Inches,
          Devices.android.samsungGalaxyS20,
        ],
      ),
    ),
  ],
)

Click "Generate Screenshots" in the toolbar

The plugin will:

1. Loop through every device × locale × screen combination
2. Programmatically switch the device and locale via DevicePreviewStore
3. Swap the displayed screen via the AutoshotController
4. Wait for the frame to settle
5. Capture the pixels as PNG
6. Package everything into a .zip and trigger a browser download

Configuration

Parameter	Type	Default	Description
screens	List<ScreenEntry>	required	Pages to screenshot
locales	List<Locale>	required	Languages to iterate
devices	List<DeviceInfo>	required	Target devices
theme	ThemeData?	ThemeData.light()	Light theme for captures
darkTheme	ThemeData?	ThemeData.dark()	Dark theme for captures
localizationsDelegates	List<LocalizationsDelegate>?	null	Your app's l10n delegates
supportedLocales	List<Locale>?	locales	Supported locales list
includeDeviceFrame	bool	false	Include device chrome in capture
settleDelay	Duration	500ms	Wait time after state changes

Delivery Modes

AutoshotToolbar(
  delivery: AutoshotDelivery.zip,         // default — single .zip download
  // delivery: AutoshotDelivery.individual, // one download per image
)

Architecture

AutoshotController        ← shared state (current screen override)
        │
        ├── AutoshotApp          ← widget wrapper inside DevicePreview.builder
        │       shows controller.currentScreen ?? normalApp
        │
        └── AutoshotToolbar      ← toolbar section widget
                │
                └── AutoshotRunner       ← automation engine
                        │
                        ├── changes device via store.selectDevice()
                        ├── changes locale via store.data.copyWith(locale:)
                        ├── swaps screen via controller.showScreen()
                        ├── waits for frame settle
                        ├── captures via DevicePreview.screenshot()
                        └── packages results → ZIP → browser download

Output

The ZIP contains PNGs with the naming convention:

autoshot/
  iphone_13_pro_max_en_us_home.png
  iphone_13_pro_max_en_us_profile.png
  iphone_13_pro_max_fr_fr_home.png
  ...
  samsung_galaxy_s20_ar_home.png
  ...

Platform Support

Platform	Status
Web	✅ Full support (ZIP download)
Mobile/Desktop	⚠️ Capture works, but download requires a file-based processor

License

MIT