WebGL (Web Graphics Library) is a JavaScript API for rendering high-performance interactive 3D and 2D graphics within any compatible web browser without the use of plug-ins. WebGL does so by introducing an API that closely conforms to OpenGL ES 2.0 that can be used in HTML5 <canvas>
elements. This conformance makes it possible for the API to take advantage of hardware graphics acceleration provided by the user's device.
Support for WebGL is present in Firefox 4+, Google Chrome 9+, Opera 12+, Safari 5.1+, Internet Explorer 11+, and Microsoft Edge build 10240+; however, the user's device must also have hardware that supports these features.
The WebGL 2 API introduces support for much of the OpenGL ES 3.0 feature set; it's provided through the WebGL2RenderingContext
interface.
The <canvas>
element is also used by the Canvas API to do 2D graphics on web pages.
WebGL 2 is a major update to WebGL which is provided through the WebGL2RenderingContext
interface. It is based on OpenGL ES 3.0 and new features include:
See also the blog post "WebGL 2 lands in Firefox" and webglsamples.org/WebGL2Samples for a few demos.
Below, you'll find an assortment of guides to help you learn WebGL concepts and tutorials that offer step-by-step lessons and examples.
In addition to the browser, the GPU itself also needs to support the feature. So, for example, S3 Texture Compression (S3TC) is only available on Tegra-based tablets. Most browsers make the WebGL context available through the webgl
context name, but older ones need experimental-webgl
as well. In addition, the upcoming WebGL 2 is fully backwards-compatible and will have the context name webgl2
.
WebGL debugging and testing
Starting with Gecko 10.0 (Firefox 10.0 / Thunderbird 10.0 / SeaMonkey 2.7), there are two preferences available which let you control the capabilities of WebGL for testing purposes:
-
webgl.min_capability_mode
-
A Boolean property that, when true
, enables a minimum capability mode. When in this mode, WebGL is configured to only support the bare minimum feature set and capabilities required by the WebGL specification. This lets you ensure that your WebGL code will work on any device or browser, regardless of their capabilities. This is false
by default.
-
webgl.disable_extensions
-
A Boolean property that, when true
, disables all WebGL extensions. This is false
by default.