Uint8Array to Texture conversion seems to be off by one.

I’m working on a custom shader that takes some state as a texture, with one item per pixel. The state is stored in a Uint8Array which is converted to a one dimensional texture like this:

const state = new Uint8Array(items * 4);
const texture = new PIXI.Texture.fromBuffer(state, items, 1);

When the texture was passed to the shader (as a uniform), the values all seemed slightly off. I tried multiplying each value by 255.0 the dividing the result by 256.0, and everything worked correctly.

It appears that PIXI is dividing the unsigned 8-bit integers in the Uint8Array by 255 to convert them to floating point fractions of one, when it should be dividing by 256.

[ivanpopelyshev]

I’m happy to share that experience with you. Its not often people stumble across it, and yes it should be confusing.

[ivanpopelyshev]

255 is 1.0