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
|
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <memdraw.h>
#include <geometry.h>
#include "libobj/obj.h"
#include "graphics.h"
#include "internal.h"
static void
viewport_draw(Viewport *v, Image *dst, char *rname)
{
Point off, scale;
off = Pt(v->p.x, v->p.y);
/* no downsampling support yet */
scale.x = max(v->bx.x, 1);
scale.y = max(v->by.y, 1);
v->fbctl->draw(v->fbctl, dst, rname, off, scale);
}
static void
viewport_memdraw(Viewport *v, Memimage *dst, char *rname)
{
Point off, scale;
off = Pt(v->p.x, v->p.y);
/* no downsampling support yet */
scale.x = max(v->bx.x, 1);
scale.y = max(v->by.y, 1);
v->fbctl->memdraw(v->fbctl, dst, rname, off, scale);
}
static void
viewport_setscale(Viewport *v, double sx, double sy)
{
assert(sx > 0 && sy > 0);
v->bx.x = sx;
v->by.y = sy;
}
static void
viewport_setscalefilter(Viewport *v, int f)
{
v->fbctl->upfilter = f;
}
static Framebuf *
viewport_getfb(Viewport *v)
{
return v->fbctl->getfb(v->fbctl);
}
static int
viewport_getwidth(Viewport *v)
{
return Dx(v->r)*v->bx.x;
}
static int
viewport_getheight(Viewport *v)
{
return Dy(v->r)*v->by.y;
}
static void
viewport_createraster(Viewport *v, char *name, ulong chan)
{
v->fbctl->createraster(v->fbctl, name, chan);
}
static Raster *
viewport_fetchraster(Viewport *v, char *name)
{
return v->fbctl->fetchraster(v->fbctl, name);
}
Viewport *
mkviewport(Rectangle r)
{
Viewport *v;
if(badrect(r)){
werrstr("bad viewport rectangle");
return nil;
}
v = emalloc(sizeof *v);
v->p = Pt2(0,0,1);
v->bx = Vec2(1,0);
v->by = Vec2(0,1);
v->fbctl = mkfbctl(r);
v->r = r;
v->draw = viewport_draw;
v->memdraw = viewport_memdraw;
v->setscale = viewport_setscale;
v->setscalefilter = viewport_setscalefilter;
v->getfb = viewport_getfb;
v->getwidth = viewport_getwidth;
v->getheight = viewport_getheight;
v->createraster = viewport_createraster;
v->fetchraster = viewport_fetchraster;
return v;
}
void
rmviewport(Viewport *v)
{
if(v == nil)
return;
rmfbctl(v->fbctl);
free(v);
}
|
