import Resource from './Resource';
import { determineCrossOrigin } from '@pixi/utils';
/**
* Base for all the image/canvas resources
* @class
* @extends PIXI.resources.Resource
* @memberof PIXI.resources
*/
export default class BaseImageResource extends Resource
{
/**
* @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement|SVGElement} source
*/
constructor(source)
{
super(source.width, source.height);
/**
* The source element
* @member {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement|SVGElement}
* @readonly
*/
this.source = source;
}
/**
* Set cross origin based detecting the url and the crossorigin
* @protected
* @param {HTMLElement} element - Element to apply crossOrigin
* @param {string} url - URL to check
* @param {boolean|string} [crossorigin=true] - Cross origin value to use
*/
static crossOrigin(element, url, crossorigin)
{
if (crossorigin === undefined && url.indexOf('data:') !== 0)
{
element.crossOrigin = determineCrossOrigin(url);
}
else if (crossorigin !== false)
{
element.crossOrigin = typeof crossorigin === 'string' ? crossorigin : 'anonymous';
}
}
/**
* Upload the texture to the GPU.
* @param {PIXI.Renderer} renderer Upload to the renderer
* @param {PIXI.BaseTexture} baseTexture Reference to parent texture
* @param {PIXI.glCore.GLTexture} glTexture Reference
* @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement|SVGElement} source (optional)
*/
upload(renderer, baseTexture, glTexture, source)
{
const gl = renderer.gl;
const width = baseTexture.realWidth;
const height = baseTexture.realHeight;
source = source || this.source;
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, baseTexture.premultiplyAlpha);
if (glTexture.width === width && glTexture.height === height)
{
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, baseTexture.format, baseTexture.type, source);
}
else
{
glTexture.width = width;
glTexture.height = height;
gl.texImage2D(gl.TEXTURE_2D, 0, baseTexture.format, baseTexture.format, baseTexture.type, source);
}
return true;
}
/**
* Destroy this BaseImageResource
* @override
* @param {PIXI.BaseTexture} [fromTexture] Optional base texture
* @return {boolean} Destroy was successful
*/
dispose()
{
this.source = null;
}
}