ref: 8112e3fbd1fbf3c7db9071819f0b5a9ed72136c6
dir: /vshot.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <draw.h>
#include <memdraw.h>
#include <mouse.h>
#include <keyboard.h>
#include <thread.h>
#define STB_IMAGE_RESIZE_IMPLEMENTATION
#define STBIR_MALLOC(x,u) malloc(x)
#define STBIR_FREE(x,u) free(x)
#define STBIR_ASSERT(x) assert(x)
#define NULL nil
typedef uintptr size_t;
#include "stb_image_resize.h"
typedef struct Win Win;
struct Win
{
long id;
char *label;
Memimage *image;
Image *thumbnail;
};
enum
{
Emouse,
Eresize,
Ekeyboard,
};
enum { Mshot, Mexit };
char *menustr[] = { "screenshot", "exit", 0 };
Menu menu = { menustr };
Mousectl *mctl;
Keyboardctl *kctl;
Rectangle winr;
Rectangle shotr;
int loading;
Win **wins;
int nwins;
int cur;
void*
emalloc(ulong size)
{
void *p;
p = malloc(size);
if(p==nil)
sysfatal("malloc: %r");
return p;
}
void*
erealloc(void *p, ulong size)
{
p = realloc(p, size);
if(p==nil)
sysfatal("realloc: %r");
return p;
}
void
screenshot(void)
{
char buf[256] = {0};
int fd;
if(enter("Save as", buf, sizeof buf, mctl, kctl, nil)<=0)
return;
fd = create(buf, OWRITE, 0644);
if(fd<0)
sysfatal("open: %r");
writememimage(fd, wins[cur]->image);
close(fd);
}
void
redraw(void)
{
Win *w;
Point p, tp;
Rectangle r;
draw(screen, screen->r, display->white, nil, ZP);
if(loading){
string(screen, addpt(screen->r.min, Pt(10, 10)), display->black, ZP, font, "Loading...");
flushimage(display, 1);
return;
}
w = wins[cur];
p.x = screen->r.min.x + (Dx(winr)-stringwidth(font, w->label))/2;
p.y = screen->r.max.y - 4 - font->height;
string(screen, p, display->black, ZP, font, w->label);
tp.x = (Dx(screen->r)-Dx(w->thumbnail->r))/2;
tp.y = (Dy(screen->r)-Dy(w->thumbnail->r))/2;
r = rectaddpt(rectaddpt(w->thumbnail->r, tp), screen->r.min);
draw(screen, r, w->thumbnail, nil, ZP);
flushimage(display, 1);
}
void
resize(void)
{
int fd, x, y;
winr = Rect(0, 0, 800, 600);
shotr = Rect(0, 0, 600, 400);
fd = open("/dev/wctl", OWRITE);
if(fd<0)
sysfatal("open: %r");
x = (Dx(display->image->r)-Dx(winr))/2;
y = (Dy(display->image->r)-Dy(winr))/2;
fprint(fd, "resize -r %d %d %d %d\n", x, y, x+Dx(winr), y+Dy(winr));
close(fd);
redraw();
}
char*
readstr(char *f)
{
Biobuf *bp;
char *s;
bp = Bopen(f, OREAD);
if(bp==nil)
sysfatal("Bopen: %r");
s = Brdstr(bp, '\n', 1);
Bterm(bp);
return s;
}
int
readint(char *f)
{
char *s;
int i;
s = readstr(f);
if(s==nil)
return -1;
i = atoi(s);
free(s);
return i;
}
void
addwin(Win *w)
{
int SINC = 32;
if(nwins==0)
wins = emalloc(SINC * sizeof *wins);
else if(nwins % SINC == 0)
wins = erealloc(wins, (nwins + SINC) * sizeof *wins);
wins[nwins++] = w;
}
Rectangle
scaledrect(Rectangle r)
{
int mw, mh, w, h;
double a;
mw = Dx(shotr);
mh = Dy(shotr);
w = Dx(r);
h = Dy(r);
a = ((double)w)/h;
if(w>mw){
w = mw;
h = floor(w/a);
}
if(h>mh){
h = mh;
w = floor(h*a);
}
return Rect(0, 0, w, h);
}
void
loadwin(int id)
{
Win *w;
char *path;
Memimage *i;
Image *t;
u8int *in, *out;
Rectangle sr;
int iw, ih, ow, oh;
int fd, n;
w = emalloc(sizeof *w);
w->id = id;
path = smprint("/dev/wsys/%d/label", id);
w->label = readstr(path);
free(path);
if(w->label==nil)
sysfatal("unable to read window label: %r");
path = smprint("/dev/wsys/%d/window", id);
fd = open(path, OREAD);
if(fd<0)
sysfatal("open: %r");
free(path);
i = readmemimage(fd);
if(i==nil)
sysfatal("readmemimage: %r");
close(fd);
iw = Dx(i->r);
ih = Dy(i->r);
n = iw*ih*4;
in = emalloc(n);
if(unloadmemimage(i, i->r, in, n)<0)
sysfatal("unloadmemimage: %r");
sr = scaledrect(i->r);
ow = Dx(sr);
oh = Dy(sr);
n = ow*oh*4;
out = emalloc(n);
stbir_resize_uint8_generic(
in, iw, ih, iw*4,
out, ow, oh, ow*4,
4, 3, STBIR_FLAG_ALPHA_PREMULTIPLIED,
STBIR_EDGE_CLAMP, STBIR_FILTER_MITCHELL, STBIR_COLORSPACE_LINEAR,
NULL);
t = allocimage(display, sr, screen->chan, 0, DNofill);
if(t==nil)
sysfatal("allocimage: %r");
loadimage(t, sr, out, ow*oh*4);
w->thumbnail = t;
w->image = i;
free(in);
free(out);
addwin(w);
}
void
loadwins(void)
{
int fd, i, wid, id;
Dir *dir;
long n;
id = readint("/mnt/wsys/winid");
if(id<0)
sysfatal("unable to read /mnt/wsys/winid: %r");
wins = emalloc(sizeof *wins);
fd = open("/dev/wsys/", OREAD);
if(fd<0)
sysfatal("open: %r");
n = dirreadall(fd, &dir);
if(n<0)
sysfatal("dirreadall: %r");
for(i=0; i<n; i++){
wid = atoi(dir[i].name);
if(wid==id)
continue;
loadwin(wid);
}
}
void
threadmain(int argc, char *argv[])
{
USED(argc);
USED(argv);
Mouse m;
Rune k;
int n;
Alt alts[] = {
{ nil, &m, CHANRCV },
{ nil, nil, CHANRCV },
{ nil, &k, CHANRCV },
{ nil, nil, CHANEND },
};
nwins = 0;
cur = 0;
loading = 1;
if(initdraw(nil, nil, "vshot")<0)
sysfatal("initdraw: %r");
if((mctl = initmouse(nil, screen))==nil)
sysfatal("initmouse: %r");
if((kctl = initkeyboard(nil))==nil)
sysfatal("initkeyboard: %r");
alts[Emouse].c = mctl->c;
alts[Eresize].c = mctl->resizec;
alts[Ekeyboard].c = kctl->c;
memimageinit();
resize();
loadwins();
loading = 0;
redraw();
for(;;){
switch(alt(alts)){
case Emouse:
if(m.buttons&4){
n = menuhit(3, mctl, &menu, nil);
switch(n){
case Mshot:
screenshot();
break;
case Mexit:
goto End;
}
}
break;
case Eresize:
if(getwindow(display, Refnone)<0)
sysfatal("getwindow: %r");
resize();
break;
case Ekeyboard:
switch(k){
case 'q':
case Kdel:
goto End;
case Kright:
++cur;
if(cur>=nwins)
cur = 0;
redraw();
break;
case Kleft:
--cur;
if(cur<0)
cur = nwins - 1;
redraw();
break;
}
break;
}
}
End:
closemouse(mctl);
closekeyboard(kctl);
threadexitsall(nil);
}