1 #include "x11-inc.h"
2 
3 #include <u.h>
4 #include <libc.h>
5 #include <draw.h>
6 #include <memdraw.h>
7 #include "x11-memdraw.h"
8 
9 static void
10 addrect(Rectangle *rp, Rectangle r)
11 {
12 	if(rp->min.x >= rp->max.x)
13 		*rp = r;
14 	else
15 		combinerect(rp, r);
16 }
17 
18 XImage*
19 xgetxdata(Memimage *m, Rectangle r)
20 {
21 	int x, y;
22 	uchar *p;
23 	Point tp, xdelta, delta;
24 	Xmem *xm;
25 	
26 	xm = m->X;
27 	if(xm == nil)
28 		return nil;
29 
30 	if(xm->dirty == 0)
31 		return xm->xi;
32 
33 	abort();	/* should never call this now */
34 
35 	r = xm->dirtyr;
36 	if(Dx(r)==0 || Dy(r)==0)
37 		return xm->xi;
38 
39 	delta = subpt(r.min, m->r.min);
40 
41 	tp = xm->r.min;	/* need temp for Digital UNIX */
42 	xdelta = subpt(r.min, tp);
43 
44 	XGetSubImage(_x.display, xm->pixmap, delta.x, delta.y, Dx(r), Dy(r),
45 		AllPlanes, ZPixmap, xm->xi, xdelta.x, delta.y);
46 
47 	if(_x.usetable && m->chan==CMAP8){
48 		for(y=r.min.y; y<r.max.y; y++)
49 		for(x=r.min.x, p=byteaddr(m, Pt(x,y)); x<r.max.x; x++, p++)
50 			*p = _x.toplan9[*p];
51 	}
52 	xm->dirty = 0;
53 	xm->dirtyr = Rect(0,0,0,0);
54 	return xm->xi;
55 }
56 
57 void
58 xputxdata(Memimage *m, Rectangle r)
59 {
60 	int offset, x, y;
61 	uchar *p;
62 	Point tp, xdelta, delta;
63 	Xmem *xm;
64 	XGC gc;
65 	XImage *xi;
66 
67 	xm = m->X;
68 	if(xm == nil)
69 		return;
70 
71 	xi = xm->xi;
72 	gc = m->chan==GREY1 ? _x.gccopy0 : _x.gccopy;
73 	if(m->depth == 24)
74 		offset = r.min.x & 3;
75 	else
76 		offset = r.min.x & (31/m->depth);
77 
78 	delta = subpt(r.min, m->r.min);
79 
80 	tp = xm->r.min;	/* need temporary on Digital UNIX */
81 	xdelta = subpt(r.min, tp);
82 
83 	if(_x.usetable && m->chan==CMAP8){
84 		for(y=r.min.y; y<r.max.y; y++)
85 		for(x=r.min.x, p=byteaddr(m, Pt(x,y)); x<r.max.x; x++, p++)
86 			*p = _x.tox11[*p];
87 	}
88 
89 	XPutImage(_x.display, xm->pixmap, gc, xi, xdelta.x, xdelta.y, delta.x, delta.y,
90 		Dx(r), Dy(r));
91 	
92 	if(_x.usetable && m->chan==CMAP8){
93 		for(y=r.min.y; y<r.max.y; y++)
94 		for(x=r.min.x, p=byteaddr(m, Pt(x,y)); x<r.max.x; x++, p++)
95 			*p = _x.toplan9[*p];
96 	}
97 }
98 
99 void
100 xdirtyxdata(Memimage *m, Rectangle r)
101 {
102 	Xmem *xm;
103 
104 	xm = m->X;
105 	if(xm == nil)
106 		return;
107 
108 	xm->dirty = 1;
109 	addrect(&xm->dirtyr, r);
110 }
111 
112 
113