git: 9front

ref: a0dc0a9b1b81655ba2e9fa87f74f07a4fcea825d
dir: /sys/src/libdraw/draw.c/

#include <u.h>
#include <libc.h>
#include <draw.h>

static void
draw1(Image *dst, Rectangle *r, Image *src, Point *p0, Image *mask, Point *p1, Drawop op)
{
	uchar *a;

	_lockdisplay(dst->display);
	a = _bufimageop(dst->display, 1+4+4+4+4*4+2*4+2*4, op);
	if(a == nil){
		_unlockdisplay(dst->display);
		return;
	}
	if(src == nil)
		src = dst->display->black;
	if(mask == nil)
		mask = dst->display->opaque;
	a[0] = 'd';
	BPLONG(a+1, dst->id);
	BPLONG(a+5, src->id);
	BPLONG(a+9, mask->id);
	BPLONG(a+13, r->min.x);
	BPLONG(a+17, r->min.y);
	BPLONG(a+21, r->max.x);
	BPLONG(a+25, r->max.y);
	BPLONG(a+29, p0->x);
	BPLONG(a+33, p0->y);
	BPLONG(a+37, p1->x);
	BPLONG(a+41, p1->y);
	_unlockdisplay(dst->display);
}

void
draw(Image *dst, Rectangle r, Image *src, Image *mask, Point p1)
{
	draw1(dst, &r, src, &p1, mask, &p1, SoverD);
}

void
drawop(Image *dst, Rectangle r, Image *src, Image *mask, Point p1, Drawop op)
{
	draw1(dst, &r, src, &p1, mask, &p1, op);
}

void
gendraw(Image *dst, Rectangle r, Image *src, Point p0, Image *mask, Point p1)
{
	draw1(dst, &r, src, &p0, mask, &p1, SoverD);
}

void
gendrawop(Image *dst, Rectangle r, Image *src, Point p0, Image *mask, Point p1, Drawop op)
{
	draw1(dst, &r, src, &p0, mask, &p1, op);
}