Evan
0e7c33a594
## What
Routes every renderer call site that read `window.devicePixelRatio`
through a single `renderDpr()` helper that caps the value at **2**.
```ts
export function renderDpr(): number {
return Math.min(window.devicePixelRatio || 2, 2);
}
```
## Why
On very high-DPI displays (DPR 3, common on phones) the WebGL backing
store was sized at 3× CSS pixels — ~9× the fragment work of 1× — for a
marginal visual gain over 2×. Capping at 2 keeps retina (DPR 2)
pixel-perfect while clamping the 3× case.
## How it stays correct
DPR isn't just the canvas size — it's one coordinate system shared by:
- the canvas backing-store size (`Renderer.resize`)
- the camera's screen↔world math (`Camera.resize` / `screenToWorld` /
`worldToScreen`)
- the camera zoom scale (`ClientGameRunner.syncCamera`)
- the constant-CSS-pixel-size world text (`WorldTextPass`)
These must all use the same DPR value or pointer hit-testing and text
sizing drift. Routing them through one helper guarantees that. The
diagnostics reporter (`Diagnostic.ts`) is intentionally left reading the
real hardware DPR, since its job is to report the actual device.
## Test
- `tsc --noEmit` clean for all touched files (one pre-existing unrelated
`marked` types error remains on `main`).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
OpenFront.io is an online real-time strategy game focused on territorial control and alliance building. Players compete to expand their territory, build structures, and form strategic alliances in various maps based on real-world geography.
This is a fork/rewrite of WarFront.io. Credit to https://github.com/WarFrontIO.
License
OpenFront source code is licensed under the GNU Affero General Public License v3.0
Current copyright notices appear in:
- Footer: "© OpenFront and Contributors"
- Loading screen: "© OpenFront and Contributors"
Modified versions must preserve these notices in reasonably visible locations.
See the LICENSE for complete requirements.
For asset licensing, see LICENSE-ASSETS.
For license history, see LICENSING.md.
🌟 Features
- Real-time Strategy Gameplay: Expand your territory and engage in strategic battles
- Alliance System: Form alliances with other players for mutual defense
- Multiple Maps: Play across various geographical regions including Europe, Asia, Africa, and more
- Resource Management: Balance your expansion with defensive capabilities
- Cross-platform: Play in any modern web browser
📋 Prerequisites
- npm (v10.9.2 or higher)
- A modern web browser (Chrome, Firefox, Edge, etc.)
🚀 Installation
-
Clone the repository
git clone https://github.com/openfrontio/OpenFrontIO.git cd OpenFrontIO -
Install dependencies
npm run instDo NOT use
npm installnornpm ibut instead use ournpm run inst. It runs the safernpm ci --ignore-scriptsto install dependencies exactly according to the versions inpackage-lock.jsonand doesn't run scripts. This can prevent being hit by a supply chain attack.
🎮 Running the Game
Development Mode
Run both the client and server in development mode with live reloading:
npm run dev
This will:
- Start the webpack dev server for the client
- Launch the game server with development settings
- Open the game in your default browser (to disable this behavior, set
SKIP_BROWSER_OPEN=truein your environment)
Client Only
To run just the client with hot reloading:
npm run start:client
Server Only
To run just the server with development settings:
npm run start:server-dev
Connecting to staging or production backends
Sometimes it's useful to connect to production servers when replaying a game, testing user profiles, purchases, or login flow.
To replay a production game, make sure you're on the same commit that the game you want to replay was executed on, you can find the
gitCommitvalue viahttps://api.openfront.io/game/[gameId]. Unfinished games cannot be replayed on localhost.
To connect to staging api servers:
npm run dev:staging
To connect to production api servers:
npm run dev:prod
🛠️ Development Tools
-
Format code:
npm run format -
Lint code:
npm run lint -
Lint and fix code:
npm run lint:fix -
Testing
npm test
🏗️ Project Structure
/src/client- Frontend game client/src/core- Deterministic game simulation/src/server- Backend game server/resources- Static assets (images, maps, etc.)
🤝 Contributing
Contributions and translations are welcome! See CONTRIBUTING.md for the workflow, the approved-issue process, project governance, and translation info.