The following table describes the three variants of the basic line primitive and the functions that draw them.
Functions that Draw Straight Lines
旼컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 쿣ariants 쿑unction 쿏escription � 쳐컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿗ines �GpiLine 쿏raws a single line from the � � � 쿬urrent position to a specified � � � 쿾oint. � 쳐컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿛olylines �GpiPolyLine 쿏raws a series of connected lines,� � � 쿯rom the current position through � � � 퀂uccessive points. � 쳐컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 �(series of �GpiPolyLineDisjoint 쿏raws a series of unconnected � 쿹ines) � 쿹ines. � 쳐컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍oxes �GpiBox 쿏raws a rectangular box with one � � � 쿬orner at the current position. � 읕컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
When the operating system draws a line, it includes the pels at the starting and ending points of the line. The algorithm used to draw the rest of the line depends on the device driver. For example, a driver for a raster device might use a modified Bresenham algorithm to draw a line, but a driver for a vector device, such as a plotter, simply would connect the starting and ending points of the line. In all cases, the result is a line primitive that looks the same from device to device.