let UID = 0;
/* eslint-disable max-len */
/**
* A wrapper for data so that it can be used and uploaded by webGL
*
* @class
* @memberof PIXI
*/
export default class Buffer
{
/**
* @param {ArrayBuffer| SharedArrayBuffer|ArrayBufferView} data the data to store in the buffer.
*/
constructor(data, _static = true, index = false)
{
/**
* The data in the buffer, as a typed array
*
* @member {ArrayBuffer| SharedArrayBuffer|ArrayBufferView}
*/
this.data = data || new Float32Array(1);
/**
* A map of renderer IDs to webgl buffer
*
* @private
* @member {object<number, GLBuffer>}
*/
this._glBuffers = {};
this._updateID = 0;
this.index = index;
this.static = _static;
this.id = UID++;
}
// TODO could explore flagging only a partial upload?
/**
* flags this buffer as requiring an upload to the GPU
*/
update(data)
{
this.data = data || this.data;
this._updateID++;
}
/**
* Destroys the buffer
*/
destroy()
{
for (let i = 0; i < this._glBuffers.length; i++)
{
this._glBuffers[i].destroy();
}
this.data = null;
}
/**
* Helper function that creates a buffer based on an array or TypedArray
*
* @static
* @param {TypedArray| Array} data the TypedArray that the buffer will store. If this is a regular Array it will be converted to a Float32Array.
* @return {PIXI.Buffer} A new Buffer based on the data provided.
*/
static from(data)
{
if (data instanceof Array)
{
data = new Float32Array(data);
}
return new Buffer(data);
}
}