code: plan9front

ref: 88a8ca5c8de86f1f3e5b43a490e0e70c6b456072
dir: /sys/lib/postscript/prologues/draw.ps/

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%
% Version 3.3.2 drawing procedures for dpost. Automatically pulled in when
% needed.
%

/inpath false def
/savematrix matrix def

/Dl {
	inpath
		{neg lineto pop pop}
		{newpath neg moveto neg lineto stroke}
	ifelse
} bind def

/De {
	/y1 exch 2 div def
	/x1 exch 2 div def
	/savematrix savematrix currentmatrix def
	neg exch x1 add exch translate
	x1 y1 scale
	0 0 1 0 360
	inpath
		{1 0 moveto arc savematrix setmatrix}
		{newpath arc savematrix setmatrix stroke}
	ifelse
} bind def

/Da {
	/dy2 exch def
	/dx2 exch def
	/dy1 exch def
	/dx1 exch def
	dy1 add neg exch dx1 add exch
	dx1 dx1 mul dy1 dy1 mul add sqrt
	dy1 dx1 neg atan
	dy2 neg dx2 atan
	inpath
		{arc}
		{newpath arc stroke}
	ifelse
} bind def

/DA {
	/dy2 exch def
	/dx2 exch def
	/dy1 exch def
	/dx1 exch def
	dy1 add neg exch dx1 add exch
	dx1 dx1 mul dy1 dy1 mul add sqrt
	dy1 dx1 neg atan
	dy2 neg dx2 atan
	inpath
		{arcn}
		{newpath arcn stroke}
	ifelse
} bind def

/Ds {
	/y2 exch def
	/x2 exch def
	/y1 exch def
	/x1 exch def
	/y0 exch def
	/x0 exch def
	x0 5 x1 mul add 6 div
	y0 5 y1 mul add -6 div
	x2 5 x1 mul add 6 div
	y2 5 y1 mul add -6 div
	x1 x2 add 2 div
	y1 y2 add -2 div
	inpath
		{curveto}
		{newpath x0 x1 add 2 div y0 y1 add -2 div moveto curveto stroke}
	ifelse
} bind def