Class: ContextSystem

Extends

• PIXI.System

Members

extensions object readonly

Extensions being used

Properties:

Name	Type	Description
drawBuffers	WEBGL_draw_buffers	WebGL v1 extension
depthTexture	WEBGL_depth_texture	WebGL v1 extension
floatTexture	OES_texture_float	WebGL v1 extension
loseContext	WEBGL_lose_context	WebGL v1 extension
vertexArrayObject	OES_vertex_array_object	WebGL v1 extension
anisotropicFiltering	EXT_texture_filter_anisotropic	WebGL v1 and v2 extension

isLost boolean readonly

true if the context is lost

renderer PIXI.Renderer inherited

The renderer this manager works for.

webGLVersion number readonly

Either 1 or 2 to reflect the WebGL version being used

Methods

contextChange (gl)

ContextSystem.js:67

Handle the context change event

Name	Type	Description
gl	WebGLRenderingContext	new webgl context

createContext (canvas, options)WebGLRenderingContext

ContextSystem.js:108

Helper class to create a WebGL Context

Name	Type	Description
canvas	HTMLCanvasElement	the canvas element that we will get the context from
options	object	An options object that gets passed in to the canvas element containing the context attributes

See:

• https://developer.mozilla.org/en/docs/Web/API/HTMLCanvasElement/getContext

Returns:

Type	Description
WebGLRenderingContext	the WebGL context

destroy () inherited overrides

System.js:25

Generic destroy methods to be overridden by the subclass

getExtensions () protected

ContextSystem.js:134

Auto-populate the extensions

handleContextLost (event) protected

ContextSystem.js:169

Handles a lost webgl context

Name	Type	Description
event	WebGLContextEvent	The context lost event.

handleContextRestored () protected

ContextSystem.js:177

Handles a restored webgl context

initFromContext (gl) protected

ContextSystem.js:82

Initialize the context

Name	Type	Description
gl	WebGLRenderingContext	WebGL context

initFromOptions (options) protected

ContextSystem.js:96

Initialize from context options

Name	Type	Description
options	object	context attributes

See:

• https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext

postrender () protected

ContextSystem.js:195

Handle the post-render runner event

validateContext (gl) protected

ContextSystem.js:206

Validate context

Name	Type	Description
gl	WebGLRenderingContext	Render context