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- README file for the LineDraw application.
-
- The LineDraw application is a very simple application that looks as single
- operator calls and wraps. The application provides a window whereas
- a set number of lines can be randomly drawn (the locations for the start
- and end of the lines are chosen at random). This application times several
- variations in drawing with single operator calls and wraps. The variations
- include binding the operators and performing the drawing within a PostScript
- loop.
-
- This application shows two significant findings. The first is that combining frequently
- invoked sets of PostScript operators into a single wrap can have a 10-20%
- improvement over calling the single operator procedure for each operator. The
- second finding is that large performance gain can be obtained by delaying
- stroking similar lines until it is necessary. If a group of lines have the same line
- attributes (color, width, linejoin, etc.) then it pays to delay the stroking until a
- limit is reached (1500 points in a path), line attributes change or no more lines
- need to be drawn.
-
-
- Below lies an annotated list of the files used in the application.
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- DrawView - A subclass of View. Holds arrays containing the point
- locations of the lines and the line attributes (color,
- width, etc). Draws the lines in the window using
- single operator calls or wraps.
-
- DrawViewWraps.psw - Wraps for clearing the view and drawing the lines.
-