adapt-dpi

This project is part of the @thi.ng/umbrella monorepo.

• About
  • Status
• Installation
• Dependencies
• Usage examples
• API
• Authors
• License

About

HDPI canvas adapter / styling utility.

Attempts to determine display pixel density via window.devicePixelRatio (default 1.0) and resizes canvas accordingly. I.e. If DPR != 1.0, attaches explicit width and height CSS properties to force canvas to given pixel size, and resizes canvas pixel buffer itself based on DPR (e.g. 2x size).

Status

STABLE - used in production

Search or submit any issues for this package

Installation

yarn add @thi.ng/adapt-dpi

// ES module
<script type="module" src="https://unpkg.com/@thi.ng/adapt-dpi?module" crossorigin></script>

// UMD
<script src="https://unpkg.com/@thi.ng/adapt-dpi/lib/index.umd.js" crossorigin></script>

Package sizes (gzipped, pre-treeshake): ESM: 150 bytes / CJS: 198 bytes / UMD: 316 bytes

Dependencies

None

Usage examples

Several demos in this repo's /examples directory are using this package.

A selection:

Screenshot	Description	Live demo	Source
	Entity Component System w/ 100k 3D particles	Demo	Source
	WebGL cube maps with async texture loading	Demo	Source
	WebGL instancing, animated grid	Demo	Source
	WebGL MSDF text rendering & particle system	Demo	Source

API

Generated API docs

import { adaptDPI } from "@thi.ng/adapt-dpi";

const canvas = document.createElement("canvas");

adaptDPI(canvas, 640, 480);

Authors

Karsten Schmidt

If this project contributes to an academic publication, please cite it as:

@misc{thing-adapt-dpi,
  title = "@thi.ng/adapt-dpi",
  author = "Karsten Schmidt",
  note = "https://thi.ng/adapt-dpi",
  year = 2015
}

License

© 2015 - 2021 Karsten Schmidt // Apache Software License 2.0