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 	r = xm->dirtyr;
34 	if(Dx(r)==0 || Dy(r)==0)
35 		return xm->xi;
36 
37 	delta = subpt(r.min, m->r.min);
38 
39 	tp = xm->r.min;	/* need temp for Digital UNIX */
40 	xdelta = subpt(r.min, tp);
41 
42 	XGetSubImage(_x.display, xm->pixmap, delta.x, delta.y, Dx(r), Dy(r),
43 		AllPlanes, ZPixmap, xm->xi, xdelta.x, delta.y);
44 
45 	if(_x.usetable && m->chan==CMAP8){
46 		for(y=r.min.y; y<r.max.y; y++)
47 		for(x=r.min.x, p=byteaddr(m, Pt(x,y)); x<r.max.x; x++, p++)
48 			*p = _x.toplan9[*p];
49 	}
50 	xm->dirty = 0;
51 	xm->dirtyr = Rect(0,0,0,0);
52 	return xm->xi;
53 }
54 
55 void
56 xputxdata(Memimage *m, Rectangle r)
57 {
58 	int offset, x, y;
59 	uchar *p;
60 	Point tp, xdelta, delta;
61 	Xmem *xm;
62 	XGC gc;
63 	XImage *xi;
64 
65 	xm = m->X;
66 	if(xm == nil)
67 		return;
68 
69 	xi = xm->xi;
70 	gc = m->chan==GREY1 ? _x.gccopy0 : _x.gccopy;
71 	if(m->depth == 24)
72 		offset = r.min.x & 3;
73 	else
74 		offset = r.min.x & (31/m->depth);
75 
76 	delta = subpt(r.min, m->r.min);
77 
78 	tp = xm->r.min;	/* need temporary on Digital UNIX */
79 	xdelta = subpt(r.min, tp);
80 
81 	if(_x.usetable && m->chan==CMAP8){
82 		for(y=r.min.y; y<r.max.y; y++)
83 		for(x=r.min.x, p=byteaddr(m, Pt(x,y)); x<r.max.x; x++, p++)
84 			*p = _x.tox11[*p];
85 	}
86 
87 	XPutImage(_x.display, xm->pixmap, gc, xi, xdelta.x, xdelta.y, delta.x, delta.y,
88 		Dx(r), Dy(r));
89 	
90 	if(_x.usetable && m->chan==CMAP8){
91 		for(y=r.min.y; y<r.max.y; y++)
92 		for(x=r.min.x, p=byteaddr(m, Pt(x,y)); x<r.max.x; x++, p++)
93 			*p = _x.toplan9[*p];
94 	}
95 }
96 
97 void
98 xdirtyxdata(Memimage *m, Rectangle r)
99 {
100 	Xmem *xm;
101 
102 	xm = m->X;
103 	if(xm == nil)
104 		return;
105 	xm->dirty = 1;
106 	addrect(&xm->dirtyr, r);
107 }
108 
109 
110