Function recalcLayerScale

InteractiveHtmlBom/web/render.js:636–660

(layerdict, width, height)

}

function recalcLayerScale(layerdict, width, height) {
  var flip = (layerdict.layer === "B");
  var bbox = applyRotation(pcbdata.edges_bbox, flip);
  var scalefactor = 0.98 * Math.min(
    width / (bbox.maxx - bbox.minx),
    height / (bbox.maxy - bbox.miny)
  );
  if (scalefactor < 0.1) {
    scalefactor = 1;
  }
  layerdict.transform.s = scalefactor;
  if (flip) {
    layerdict.transform.x = -((bbox.maxx + bbox.minx) * scalefactor + width) * 0.5;
  } else {
    layerdict.transform.x = -((bbox.maxx + bbox.minx) * scalefactor - width) * 0.5;
  }
  layerdict.transform.y = -((bbox.maxy + bbox.miny) * scalefactor - height) * 0.5;
  for (var c of ["bg", "fab", "silk", "highlight"]) {
    canvas = layerdict[c];
    canvas.width = width;
    canvas.height = height;
    canvas.style.width = (width / devicePixelRatio) + "px";
    canvas.style.height = (height / devicePixelRatio) + "px";
  }
}

function redrawCanvas(layerdict) {
  prepareLayer(layerdict);