/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <draw.h> void_setdrawop(Display *d, Drawop op){	uchar *a; 	if(op != SoverD){		a = bufimage(d, 1+1);		if(a == 0)			return;		a[0] = 'O';		a[1] = op;	}}		static voiddraw1(Image *dst, Rectangle *r, Image *src, Point *p0, Image *mask, Point *p1, Drawop op){	uchar *a; 	_setdrawop(dst->display, op); 	a = bufimage(dst->display, 1+4+4+4+4*4+2*4+2*4);	if(a == 0)		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);} voiddraw(Image *dst, Rectangle r, Image *src, Image *mask, Point p1){	draw1(dst, &r, src, &p1, mask, &p1, SoverD);} voiddrawop(Image *dst, Rectangle r, Image *src, Image *mask, Point p1, Drawop op){	draw1(dst, &r, src, &p1, mask, &p1, op);} voidgendraw(Image *dst, Rectangle r, Image *src, Point p0, Image *mask, Point p1){	draw1(dst, &r, src, &p0, mask, &p1, SoverD);} voidgendrawop(Image *dst, Rectangle r, Image *src, Point p0, Image *mask, Point p1, Drawop op){	draw1(dst, &r, src, &p0, mask, &p1, op);}