///<reference path="./TiledSpriteRenderer.ts"/>
class ScrollingSpriteRenderer extends TiledSpriteRenderer {
    public scrollSpeedX = 15;
    public scroolSpeedY = 0;
    private _scrollX = 0;
    private _scrollY = 0;

    public update(){
        this._scrollX += this.scrollSpeedX * Time.deltaTime;
        this._scrollY += this.scroolSpeedY * Time.deltaTime;
        this.sourceRect.x = this._scrollX;
        this.sourceRect.y = this._scrollY;
    }

    public render(camera: Camera) {
        if (!this.sprite)
            return;

        super.render(camera);

        let renderTexture = new egret.RenderTexture();
        let cacheBitmap = new egret.DisplayObjectContainer();
        cacheBitmap.removeChildren();
        cacheBitmap.addChild(this.leftTexture);
        cacheBitmap.addChild(this.rightTexture);

        this.leftTexture.x = this.sourceRect.x;
        this.rightTexture.x = this.sourceRect.x - this.sourceRect.width;
        this.leftTexture.y = this.sourceRect.y;
        this.rightTexture.y = this.sourceRect.y;

        cacheBitmap.cacheAsBitmap = true;
        renderTexture.drawToTexture(cacheBitmap, new egret.Rectangle(0, 0, this.sourceRect.width, this.sourceRect.height));

        this.bitmap.texture = renderTexture;
    }
}