cables_dev/cables/src/core/cg/cg_canvas.js

class CgCanvas
{
    constructor(options)
    {
        if (!options)
        {
            console.error("CgCanvas no options");
        }
        else
        {
            this._canvasEle = options.canvasEle;
        }
 
        if (!options.cg)console.error("CgCanvas options has no cg");
        if (!options.canvasEle)console.error("CgCanvas options has no canvasEle");
 
        this._cg = options.cg;
        this.pixelDensity = 1;
        this.canvasWidth = this.canvasEle.clientWidth;
        this.canvasHeight = this.canvasEle.clientHeight;
 
        this._oldWidthRp = -1;
        this._oldHeightRp = -1;
 
        this.setSize(this.canvasWidth, this.canvasHeight);
    }
 
    get canvasEle() { return this._canvasEle; }
 
 
    setSize(w, h, ignorestyle)
    {
        if (this._oldWidthRp != w * this.pixelDensity || this._oldHeightRp != h * this.pixelDensity)
        {
            this._oldWidthRp = this.canvasEle.width = w * this.pixelDensity;
            this._oldHeightRp = this.canvasEle.height = h * this.pixelDensity;
 
            if (!ignorestyle)
            {
                this.canvasEle.style.width = w + "px";
                this.canvasEle.style.height = h + "px";
            }
 
            this.updateSize();
 
            this._cg.emitEvent("resize");
        }
    }
 
    updateSize()
    {
        this.canvasEle.width = this.canvasWidth = this.canvasEle.clientWidth * this.pixelDensity;
        this.canvasEle.height = this.canvasHeight = this.canvasEle.clientHeight * this.pixelDensity;
    }
 
    dispose()
    {
        this._canvasEle.remove();
        this._canvasEle = null;
    }
}
 
export { CgCanvas };