Problem using Filters and Sprites in a StageGL context - createjs

Question

First of all, sory my English.
I am working with some sprites using WebGL on CreateJS library. I need apply a custom color filter over the jpg used to create the spritsheet.
Here is my code:
let bmp = new createjs.Bitmap(rscTexture);
bmp.filters = [new createjs.AlphaFilter()];
bmp.cache(0, 0, rscTexture.width, rscTexture.height, {1, useGL:"stage"});
let frames = this.generateFrames();
this.sprite = new createjs.Sprite( new createjs.SpriteSheet({
framerate: 24,
"images": [bmp.cacheCanvas],
"frames": frames,
"animations": {
"run": [0, frames.length - 1],
}
}));
The problem is that this trow next error:
ERROR Cannot use 'stage' for cache because the object's parent stage
is not set, please addChild to the correct stage.
How can I add the element to the stage first, if I still do not create it?

Answer 1

If you have a StageGL instance that already exists, you can pass it in directly instead. The "stage" shortcut attempts to figure it out; however, sometimes you need to be specific and directly passing the reference is the only solution.
bmp.cache(0, 0, rscTexture.width, rscTexture.height, 1, { useGL: myStage });
The specific and full documentation can be found here:
https://createjs.com/docs/easeljs/classes/BitmapCache.html#method_define