Method _paintList

src/common/overlay/levelRenderer/Painter.js:188–311

* Method: _paintList * 按列表绘制图形。

(list, paintAll)

     * 按列表绘制图形。
     */
    _paintList(list, paintAll) {
        if (typeof(paintAll) == 'undefined') {
            paintAll = false;
        }

        this._updateLayerStatus(list);

        var currentLayer;
        var currentZLevel;
        var ctx;

        for (var id in this._layers) {
            if (id !== 'hover') {
                this._layers[id].unusedCount++;
                this._layers[id].updateTransform();
            }
        }

        var invTransform = [];

        for (var i = 0, l = list.length; i < l; i++) {
            var shape = list[i];

            if (currentZLevel !== shape.zlevel) {
                if (currentLayer && currentLayer.needTransform) {
                    ctx.restore();
                }

                currentLayer = this.getLayer(shape.zlevel);
                ctx = currentLayer.ctx;
                currentZLevel = shape.zlevel;

                // Reset the count
                currentLayer.unusedCount = 0;

                if (currentLayer.dirty || paintAll) {
                    currentLayer.clear();
                }

                if (currentLayer.needTransform) {
                    ctx.save();
                    currentLayer.setTransform(ctx);
                }
            }

            // Start group clipping
            if (ctx && shape.__startClip) {
                var clipShape = shape.__startClip;
                ctx.save();
                // Set transform
                if (clipShape.needTransform) {
                    let m = clipShape.transform;
                    SUtil.Util_matrix.invert(invTransform, m);
                    ctx.transform(
                        m[0], m[1],
                        m[2], m[3],
                        m[4], m[5]
                    );