define boite {
	xleft  = $1
	xright = $2
	yup    = $3
	ydown  = $4

	line from xleft,ydown to xright,ydown
	line from xleft,yup to xright,yup
	line from xleft,yup to xleft,ydown
	line from xright,yup to xright,ydown
}

define legend {
	xleft  = $1
	xright = $2
	yup    = $3
	ydown  = $4

	diffx = xright - xleft
	diffy = yup - ydown

	hdiff = diffy/5.7
	cy = yup - (diffy/6)
	cx = (diffx/20) + xleft

	lstartx = cx
	lendx = cx + diffx/8
	tstartx = lendx + diffx/20

.ps -2
	.gcolor red
	line from lstartx,cy to lendx,cy
	.gcolor
	"RAM only" ljust at tstartx,cy
	cy = cy - hdiff
	line from lstartx,cy to lendx,cy
	"Cached db and index" ljust at tstartx,cy
	cy = cy - hdiff
	.gcolor pink
	line from lstartx,cy to lendx,cy
	.gcolor
	"FIFO db and cached index" ljust at tstartx,cy
	cy = cy - hdiff
	.gcolor blue
	line from lstartx,cy to lendx,cy
	.gcolor
	"Uncached db, cached index" ljust at tstartx,cy
	cy = cy - hdiff
	.gcolor green
	line from lstartx,cy to lendx,cy
	.gcolor
	"Uncached db and index" ljust at tstartx,cy
.ps +2
}

define legend_fifo_addition {
	xleft  = $1
	xright = $2
	yup    = $3
	ydown  = $4

	diffx = xright - xleft
	diffy = yup - ydown

	hdiff = diffy/3.5
	cy = yup - (diffy/10)
	cx = (diffx/20) + xleft

	lstartx = cx
	lendx = cx + diffx/8
	tstartx = lendx + diffx/20

.ps -2
	cy = cy - hdiff
	.gcolor orange
	line from lstartx,cy to lendx,cy
	.gcolor
	"basic FIFO" ljust at tstartx,cy
	cy = cy - hdiff
	.gcolor green
	line from lstartx,cy to lendx,cy
	.gcolor
	"Efficient FIFO" ljust at tstartx,cy
.ps +2
}