/**
     * Necessary to upload the actual image data to the GPU. Without this the texture will be blank. Called automatically
     * in most cases due to loading and caching APIs. Flagging an image source with `_invalid = true` will trigger this
     * next time the image is rendered.
     * @param {WebGLRenderingContext} gl
     * @param {Image | Canvas} image The image data to be uploaded
     * @protected
     */
    p._updateTextureImageData = function (gl, image) {
        // the bitwise & is intentional, cheap exponent 2 check
        var isNPOT = (image.width & image.width-1) || (image.height & image.height-1);
        var texture = this._textureDictionary[image._storeID];

        gl.activeTexture(gl.TEXTURE0 + texture._activeIndex);
        gl.bindTexture(gl.TEXTURE_2D, texture);

        texture.isPOT = !isNPOT;
        this.setTextureParams(gl, texture.isPOT);

        try {
            gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
        } catch(e) {
            var errString = "\nAn error has occurred. This is most likely due to security restrictions on WebGL images with local or cross-domain origins";
            if(console.error) {
                //TODO: LM: I recommend putting this into a log function internally, since you do it so often, and each is implemented differently.
                console.error(errString);
                console.error(e);
            } else if (console) {
                console.log(errString);
                console.log(e);
            }
        }

        image._invalid = false;

        texture._w = image.width;
        texture._h = image.height;

        if (this.vocalDebug) {
            if (isNPOT) {
                console.warn("NPOT(Non Power of Two) Texture: "+ image.src);
            }
            if (image.width > gl.MAX_TEXTURE_SIZE || image.height > gl.MAX_TEXTURE_SIZE){
                console && console.error("Oversized Texture: "+ image.width+"x"+image.height +" vs "+ gl.MAX_TEXTURE_SIZE +"max");
            }
        }
    };