Engine - TextureAtlasHandler bugs

I tried to load an atlas exported from TexturePacker (I use: https://github.com/playcanvas/playcanvas-texturepacker exporter)

my code is:

this.app.assets.loadFromUrl("assets/atlas_0.json, "textureatlas", (err: string, asset: pc.Asset) => { );

1. After the JSON file is loaded, the engine tries to load the texture (assets/atlas_0.png) but that doesn't work and the the engine hangs.

2. I can load the texture myself before I start loading the atlas json. This works, but the JSON file exported from the TexturePacker has different structure of frames then pc.TextureAtlas and the pc.TextureAtlasHandler doesn't convert them correctly.

This is code from texture-atlas.js:

            // set frames
            var frames = {};
            for (var key in asset.data.frames) {
                var frame = asset.data.frames[key];
                frames[key] = {
                    rect: new pc.Vec4(frame.rect),
                    pivot: new pc.Vec2(frame.pivot),
                    border: new pc.Vec4(frame.border)
                };
            }
            asset.resource.frames = frames;

But in the JSON file there is no "rect" or "border". There is "frame" and "spriteSourceSize". Also the coordinates system is different: Y in TexturePacker starts at the top.

Start in texture-atlas.js and inspect TextureAtlasHandler's texture-loading path and frame conversion for TexturePacker JSON. Compare the exported frame, spriteSourceSize, and top-origin coordinates with the expected atlas fields; done means the texture loads without hanging and the frames are converted correctly.