Abstract: A method of measuring a distance between two points of a layout, which first generates a first view and a second view of the layout, and maintains a transformation relationship between the first view and the second view. Then, after accepting a first point on the first view, trace a cursor's position on the second view as the second point, and graphically displays the distance between the first point and the second point on the first view and the second view. The first point is transformed according to the transformation relationship to determine its position in the second view, and the second point is transformed according to the transformation relationship to determine its position in the first view.

Abstract: A method for subdividing data of a layout, which firstly divides the layout into a plurality of to-be-processed regions so that the number of entities of each to-be-processed region is smaller then a predetermined number, and calculating an image data amount and an geometric data amount of each to-be-processed region. Then the method selects a to-be-processed region from the plurality of to-be-processed regions as a selected region, and compares the image data amount of the selected region with the geometry data amount of the selected region. When the image data amount of the selected region is larger than the geometry data amount of the selected region, the method merges the selected region with its neighboring to-be-processed region to obtain a merged region and set the merged result as a selected region. When the image data amount of the selected region is smaller than the geometry data amount of the selected region, the method sets the selected region as a subdivision of the layout.

Abstract: A method for subdividing data of a layout, which firstly divides the layout into a plurality of to-be-processed regions so that the number of entities of each to-be-processed region is smaller then a predetermined number, and calculating an image data amount and an geometric data amount of each to-be-processed region. Then the method selects a to-be-processed region from the plurality of to-be-processed regions as a selected region, and compares the image data amount of the selected region with the geometry data amount of the selected region. When the image data amount of the selected region is larger than the geometry data amount of the selected region, the method merges the selected region with its neighboring to-be-processed region to obtain a merged region and set the merged result as a selected region. When the image data amount of the selected region is smaller than the geometry data amount of the selected region, the method sets the selected region as a subdivision of the layout.