shithub: libdraw.myr

ref: d180b70c6c69ffe8168cc8571772ad6e15ac6aba
dir: /draw.myr/

use std

use "types"
use "chan"
use "pack"

pkg draw =
	const fill	: (dst : image#, src : image#, r : rect -> void)
	const draw	: (dst : image#, r : rect, src : image#, p0 : point -> void)
	const drawop	: (dst : image#, r : rect, src : image#, p0 : point, op : drawop -> void)
	const mdrawop	: (dst : image#, r : rect, s : image#, p0 : point, mask : image#, p1 : point, op : drawop -> void)
	const inset	: (r : rect, off : int -> rect)
;;

const fill = {dst, src, r
	// d dstid[4] srcid[4] maskid[4] dstr[4*4] srcp[2*4] maskp[2*4]
	mdrawop(dst, r, src, Zp, dst.dpy.opaque, Zp, SoverD)
}

const draw = {dst, r, src, p0
	mdrawop(dst, r, src, p0, dst.dpy.opaque, Zp, SoverD)
}

const drawop = {dst, r, src, p0, op
	mdrawop(dst, r, src, p0, dst.dpy.opaque, Zp, SoverD)
}

const mdrawop = {dst, r, src, p0, mask, p1, op
	if op != SoverD
		pack(dst.dpy, "bb", 0, ('O' : byte), (op : byte))
	;;
	pack(dst.dpy, "biiiriiii", 0, \
		('d' : byte), /* draw */ \
		dst.id, \
		src.id, \
		mask.id, \
		r, \
		p0.x, \
		p0.y, \
		p1.x, \
		p1.y)

}

const inset = {r, off
	r.x0 += off
	r.y0 += off
	r.x1 -= off
	r.y1 -= off
	-> r
}