Method resize

systemvm/agent/noVNC/core/display.js:189–221

(width, height)

    }

    resize(width, height) {
        this._prevDrawStyle = "";

        this._fbWidth = width;
        this._fbHeight = height;

        const canvas = this._backbuffer;
        if (canvas.width !== width || canvas.height !== height) {

            // We have to save the canvas data since changing the size will clear it
            let saveImg = null;
            if (canvas.width > 0 && canvas.height > 0) {
                saveImg = this._drawCtx.getImageData(0, 0, canvas.width, canvas.height);
            }

            if (canvas.width !== width) {
                canvas.width = width;
            }
            if (canvas.height !== height) {
                canvas.height = height;
            }

            if (saveImg) {
                this._drawCtx.putImageData(saveImg, 0, 0);
            }
        }

        // Readjust the viewport as it may be incorrectly sized
        // and positioned
        const vp = this._viewportLoc;
        this.viewportChangeSize(vp.w, vp.h);
        this.viewportChangePos(0, 0);
    }

    getImageData() {
        return this._drawCtx.getImageData(0, 0, this.width, this.height);