PixiJS

Class: ContextSystem

PIXI.ContextSystem

System plugin to the renderer to manage the context.

new PIXI.ContextSystem (renderer)

ContextSystem.ts:153
Name Type Description
renderer PIXI.Renderer

The renderer this System works for.

Implements

Members

extensions object readonly

Extensions available.

Properties:
Name Type Description
anisotropicFiltering EXT_texture_filter_anisotropic

WebGL v1 and v2 extension
depthTexture WEBGL_depth_texture

WebGL v1 extension
drawBuffers WEBGL_draw_buffers

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

isLost boolean readonly

true if the context is lost

supports object readonly

Features supported by current context.

Properties:
Name Type Description
uint32Indices boolean

Support for 32-bit indices buffer.

useContextAlpha boolean Deprecated : since 7.0.0

Pass-thru setting for the canvas' context alpha property. This is typically not something you need to fiddle with. If you want transparency, use backgroundAlpha.

webGLVersion number readonly

Either 1 or 2 to reflect the WebGL version being used.

Methods

createContext (canvas, options) WebGLRenderingContext

ContextSystem.ts:254

Helper class to create a WebGL Context

Name Type Description
canvas PIXI.ICanvas

the canvas element that we will get the context from
options WebGLContextAttributes

An options object that gets passed in to the canvas element containing the context attributes
See:
Returns:
Type Description
WebGLRenderingContext the WebGL context

contextChange (gl) void protected

ContextSystem.ts:179

Handles the context change event.

Name Type Description
gl WebGLRenderingContext

New WebGL context.

getExtensions () void protected

ContextSystem.ts:295

Auto-populate the extensions.

handleContextLost (event) void protected

ContextSystem.ts:341

Handles a lost webgl context

Name Type Description
event WebGLContextEvent

The context lost event.

handleContextRestored () void protected

ContextSystem.ts:360

Handles a restored webgl context.

initFromContext (gl) void protected

ContextSystem.ts:219

Initializes the context.

Name Type Description
gl WebGLRenderingContext

WebGL context

initFromOptions (options) void protected

ContextSystem.ts:241

Initialize from context options

Name Type Description
options object

context attributes
See:

postrender () void protected

ContextSystem.ts:387

Handle the post-render runner event.

validateContext (gl) void protected

ContextSystem.ts:396

Validate context.

Name Type Description
gl WebGLRenderingContext

Render context.