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