mozilla

WebGL

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WebGL (Web Graphics Library) is a JavaScript API for rendering 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.

Support for WebGL is present in Firefox 4+, Google Chrome 9+, Opera 12+, Safari 5.1+ and Internet Explorer 11+; however, the user's device must also have hardware that supports these features.

The <canvas> element is also used by Canvas 2D to do 2D graphics on web pages.

Reference

Guides and tutorials

资源

  • Raw WebGL: An introduction to WebGL A talk by Nick Desaulniers that introduces the basics of WebGL. This is a great place to start if you've never done low-level graphics programming.
  • Khronos WebGL site The main web site for WebGL at the Khronos Group.
  • Learning WebGL A site with tutorials on how to use WebGL.
  • WebGL Fundamentals A basic tutorial with fundamentals of WebGL.
  • WebGL playground An online tool for creating and sharing WebGL projects. Good for quick prototyping and experimenting.
  • WebGL Academy An HTML/JavaScript editor with tutorials to learn basics of webgl programming.

  • glMatrix JavaScript Matrix and Vector library for High Performance WebGL apps
  • Sylvester An open source library for manipulating vectors and matrices. Not optimized for WebGL but extremely robust.

规范

Specification Status Comment
WebGL 1.0 Recommendation Initial definition.
WebGL 2.0 Editor's Draft  

浏览器兼容性

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support 4.0 (2.0) 9 11 12 (experiment) 5.1 (experiment)
OES_texture_float 6.0 (6.0) ? ? ? ?
OES_standard_derivatives 10.0 (10.0) ? ? ? ?
EXT_texture_filter_anisotropic 13.0 (13.0) ? ? ? ?
WEBGL_compressed_texture_s3tc 15.0 (15.0) ? ? ? ?
drawingBufferWidth and drawingBufferHeight attributes 9.0 (9.0) ? ? ? ?
Feature Firefox Mobile (Gecko) Chrome for Android IE Mobile Opera Mobile Safari Mobile
Basic support 4 25 (experiment) 未实现 12 (experiment) 8.1
drawingBufferWidth and drawingBufferHeight attributes 9.0 (9.0) 25 ? ? ?
OES_texture_float 6.0 (6.0) 25 ? ? ?
OES_standard_derivatives 10.0 (10.0) 25 ? ? ?
EXT_texture_filter_anisotropic 13.0 (13.0) 25 ? ? ?
OES_element_index_uint ? 25 ? ? ?
OES_vertex_array_object ? 25 ? ? ?
WEBGL_compressed_texture_s3tc 15.0 (15.0) 25
prefixed with WEBKIT_
? ? ?
WEBKIT_EXT_texture_filter_nisotropic 未实现 25 未实现 未实现 ?

Compatibility notes

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 experimental-webgl2 in the future for testing.

Gecko备忘

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.

参阅

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