1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
#include <u.h>
#include <libc.h>
#include <draw.h>
typedef struct Memimage Memimage;
static int screenid;
Screen*
allocscreen(Image *image, Image *fill, int public)
{
uchar *a;
Screen *s;
int id, try;
Display *d;
d = image->display;
if(d != fill->display){
werrstr("allocscreen: image and fill on different displays");
return nil;
}
s = malloc(sizeof(Screen));
if(s == nil)
return nil;
if(!screenid)
screenid = getpid();
for(try=0; try<25; try++){
/* loop until find a free id */
a = bufimage(d, 1+4+4+4+1);
if(a == nil)
break;
id = ++screenid & 0xffff; /* old devdraw bug */
a[0] = 'A';
BPLONG(a+1, id);
BPLONG(a+5, image->id);
BPLONG(a+9, fill->id);
a[13] = public;
if(flushimage(d, 0) != -1)
goto Found;
}
free(s);
return nil;
Found:
s->display = d;
s->id = id;
s->image = image;
assert(s->image != nil && s->image->chan != 0);
s->fill = fill;
return s;
}
Screen*
publicscreen(Display *d, int id, ulong chan)
{
uchar *a;
Screen *s;
s = malloc(sizeof(Screen));
if(s == nil)
return nil;
a = bufimage(d, 1+4+4);
if(a == nil){
Error:
free(s);
return nil;
}
a[0] = 'S';
BPLONG(a+1, id);
BPLONG(a+5, chan);
if(flushimage(d, 0) < 0)
goto Error;
s->display = d;
s->id = id;
s->image = nil;
s->fill = nil;
return s;
}
int
freescreen(Screen *s)
{
uchar *a;
Display *d;
if(s == nil)
return 0;
d = s->display;
a = bufimage(d, 1+4);
if(a == nil){
free(s);
return -1;
}
a[0] = 'F';
BPLONG(a+1, s->id);
free(s);
return 1;
}
Image*
allocwindow(Screen *s, Rectangle r, int ref, ulong col)
{
return _allocwindow(nil, s, r, ref, col);
}
Image*
_allocwindow(Image *i, Screen *s, Rectangle r, int ref, ulong col)
{
Display *d;
d = s->display;
i = _allocimage(i, d, r, d->screenimage->chan, 0, col, s->id, ref);
if(i == nil)
return nil;
i->screen = s;
i->next = s->display->windows;
s->display->windows = i;
return i;
}
static
void
topbottom(Image **w, int n, int top)
{
int i;
uchar *b;
Display *d;
if(n < 0){
Ridiculous:
fprint(2, "top/bottom: ridiculous number of windows\n");
return;
}
if(n == 0)
return;
if(n > (w[0]->display->bufsize-100)/4)
goto Ridiculous;
/*
* this used to check that all images were on the same screen.
* we don't know the screen associated with images we acquired
* by name. instead, check that all images are on the same display.
* the display will check that they are all on the same screen.
*/
d = w[0]->display;
for(i=1; i<n; i++)
if(w[i]->display != d){
fprint(2, "top/bottom: windows not on same screen\n");
return;
}
if(n==0)
return;
b = bufimage(d, 1+1+2+4*n);
if(b == nil)
return;
b[0] = 't';
b[1] = top;
BPSHORT(b+2, n);
for(i=0; i<n; i++)
BPLONG(b+4+4*i, w[i]->id);
}
void
bottomwindow(Image *w)
{
if(w->screen != nil)
topbottom(&w, 1, 0);
}
void
topwindow(Image *w)
{
if(w->screen != nil)
topbottom(&w, 1, 1);
}
void
bottomnwindows(Image **w, int n)
{
topbottom(w, n, 0);
}
void
topnwindows(Image **w, int n)
{
topbottom(w, n, 1);
}
int
originwindow(Image *w, Point log, Point scr)
{
uchar *b;
Point delta;
b = bufimage(w->display, 1+4+2*4+2*4);
if(b == nil)
return 0;
b[0] = 'o';
BPLONG(b+1, w->id);
BPLONG(b+5, log.x);
BPLONG(b+9, log.y);
BPLONG(b+13, scr.x);
BPLONG(b+17, scr.y);
delta = subpt(log, w->r.min);
w->r = rectaddpt(w->r, delta);
w->clipr = rectaddpt(w->clipr, delta);
return 1;
}
|
