Get pixeldata in a webgl?

[GBear]

hi.  

Can image or container or basetexture can get pixeldata like imagedata?

I wanna spawn particle on part of drawing position. so I wanna get pixeldata from image like sprite, container, texture or basetexture

do you have any idea?

[Exca]

You can use extract-plugin that is found on renderer.

renderer.plugins.extract.pixels( targetContainer );

http://pixijs.download/dev/docs/PIXI.extract.html

[ivan.popelyshev]

And if you encounter any strange things: wrong translations, premultiplied alpha - look in pixijs issues on github, we have several threads about it, with code snippets that you can port to your pixijs version. Basically, its all "generateTexture" and "readPixels" 

[ivan.popelyshev]

You can snatch improved code from here: https://github.com/pixijs/pixi.js/pull/4632 It has several good classes that manage bitmap state.

[botmaster]

Note that this is an expensive operation memory and CPU wise.