ref: a7a315bff61bff58a9c918294f53c1e87d7ae7bb
dir: /sys/src/games/eui.c/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <keyboard.h>
#include <mouse.h>
#include "eui.h"
typedef struct Kfn Kfn;
u64int keys, keys2;
int trace, paused;
int savereq, loadreq;
QLock pauselock;
int scale, fixscale, warp10;
uchar *pic;
Rectangle picr;
Mousectl *mc;
Image *bg;
static int profile, framestep;
static int vwdx, vwdy, vwbpp;
static ulong vwchan;
static Image *fb;
static Channel *conv, *sync[2];
static uchar *screenconv[2];
static int screenconvi;
struct Kfn{
Rune r;
int k;
char joyk[16];
void(*fn)(void);
Kfn *n;
};
static Kfn kfn, kkn;
static int ax0, ax1;
void *
emalloc(ulong sz)
{
void *v;
v = mallocz(sz, 1);
if(v == nil)
sysfatal("malloc: %r");
setmalloctag(v, getcallerpc(&sz));
return v;
}
static void
joyproc(void *)
{
char *s, *down[9];
static char buf[64];
int n, k, j;
Kfn *kp;
j = 1;
for(;;){
n = read(0, buf, sizeof(buf) - 1);
if(n <= 0)
sysfatal("read: %r");
buf[n] = 0;
n = getfields(buf, down, nelem(down), 1, " ");
k = 0;
for(n--; n >= 0; n--){
s = down[n];
if(strcmp(s, "joy1") == 0)
j = 1;
else if(strcmp(s, "joy2") == 0)
j = 2;
for(kp=kkn.n; kp!=nil; kp=kp->n){
if(strcmp(kp->joyk, s) == 0)
k |= kp->k;
}
}
if(j == 2)
keys2 = k;
else
keys = k;
}
}
static void
keyproc(void *)
{
int fd, n, k;
static char buf[256];
char *s;
Rune r;
Kfn *kp;
fd = open("/dev/kbd", OREAD);
if(fd < 0)
sysfatal("open: %r");
for(;;){
if(buf[0] != 0){
n = strlen(buf)+1;
memmove(buf, buf+n, sizeof(buf)-n);
}
if(buf[0] == 0){
n = read(fd, buf, sizeof(buf)-1);
if(n <= 0)
sysfatal("read /dev/kbd: %r");
buf[n-1] = 0;
buf[n] = 0;
}
if(buf[0] == 'c'){
if(utfrune(buf, Kdel)){
close(fd);
threadexitsall(nil);
}
if(utfrune(buf, KF|5))
savereq = 1;
if(utfrune(buf, KF|6))
loadreq = 1;
if(utfrune(buf, KF|12))
profile ^= 1;
if(utfrune(buf, 't'))
trace = !trace;
for(kp=kfn.n; kp!=nil; kp=kp->n){
if(utfrune(buf, kp->r))
kp->fn();
}
}
if(buf[0] != 'k' && buf[0] != 'K')
continue;
s = buf + 1;
k = 0;
while(*s != 0){
s += chartorune(&r, s);
switch(r){
case Kdel: close(fd); threadexitsall(nil);
case Kesc:
if(paused)
qunlock(&pauselock);
else
qlock(&pauselock);
paused = !paused;
break;
case KF|1:
if(paused){
qunlock(&pauselock);
paused=0;
}
framestep = !framestep;
break;
case '`':
warp10 = !warp10;
break;
}
for(kp=kkn.n; kp!=nil; kp=kp->n){
if(utfrune(buf, kp->r))
k |= kp->k;
}
}
if((k & ax0) == ax0)
k &= ~ax0;
if((k & ax1) == ax1)
k &= ~ax1;
keys = k;
}
}
static void
timing(void)
{
static int fcount;
static vlong old;
static char buf[32];
vlong new;
if(++fcount == 60)
fcount = 0;
else
return;
new = nsec();
if(new != old)
sprint(buf, "%6.2f%%", 1e11 / (new - old));
else
buf[0] = 0;
draw(screen, rectaddpt(Rect(10, 10, vwdx-40, 30), screen->r.min), bg, nil, ZP);
string(screen, addpt(screen->r.min, Pt(10, 10)), display->black, ZP, display->defaultfont, buf);
old = nsec();
}
static void
screeninit(void)
{
Point p;
send(sync[0], nil);
if(!fixscale){
scale = Dx(screen->r) / vwdx;
if(Dy(screen->r) / vwdy < scale)
scale = Dy(screen->r) / vwdy;
}
if(scale <= 0)
scale = 1;
else if(scale > 16)
scale = 16;
p = divpt(addpt(screen->r.min, screen->r.max), 2);
picr = Rpt(subpt(p, Pt(scale * vwdx/2, scale * vwdy/2)),
addpt(p, Pt(scale * vwdx/2, scale * vwdy/2)));
freeimage(fb);
fb = allocimage(display, Rect(0, 0, scale * vwdx, scale > 1 ? 1 : scale * vwdy),
vwchan, scale > 1, 0);
free(pic);
pic = emalloc(vwdx * vwdy * vwbpp * scale);
free(screenconv[0]);
free(screenconv[1]);
screenconv[0] = emalloc(vwdx * vwdy * vwbpp * scale);
screenconv[1] = emalloc(vwdx * vwdy * vwbpp * scale);
draw(screen, screen->r, bg, nil, ZP);
recv(sync[1], nil);
}
void
flushmouse(int discard)
{
Mouse m;
if(nbrecvul(mc->resizec) > 0){
send(sync[0], nil);
if(getwindow(display, Refnone) < 0)
sysfatal("resize failed: %r");
recv(sync[1], nil);
screeninit();
}
if(discard)
while(nbrecv(mc->c, &m) > 0)
;
}
static void
screenproc(void*)
{
uchar *p;
enum { Draw, Sync1, Sync2 };
Alt alts[] = {
[Draw] {.c = conv, .v = &p, .op = CHANRCV},
[Sync1] {.c = sync[0], .op = CHANRCV},
[Sync2] {.c = sync[1], .op = CHANNOP},
{.op = CHANEND},
};
for(;;) switch(alt(alts)){
case Draw:
if(scale == 1){
loadimage(fb, fb->r, p, vwdx * vwdy * vwbpp);
draw(screen, picr, fb, nil, ZP);
} else {
Rectangle r;
uchar *s;
int w;
s = p;
r = picr;
w = vwdx * vwbpp * scale;
while(r.min.y < picr.max.y){
loadimage(fb, fb->r, s, w);
s += w;
r.max.y = r.min.y+scale;
draw(screen, r, fb, nil, ZP);
r.min.y = r.max.y;
}
}
flushimage(display, 1);
break;
case Sync1:
alts[Draw].op = CHANNOP;
alts[Sync1].op = CHANNOP;
alts[Sync2].op = CHANSND;
break;
case Sync2:
alts[Draw].op = CHANRCV;
alts[Sync1].op = CHANRCV;
alts[Sync2].op = CHANNOP;
break;
}
}
void
flushscreen(void)
{
memmove(screenconv[screenconvi], pic, vwdx * vwdy * vwbpp * scale);
if(sendp(conv, screenconv[screenconvi]) > 0)
screenconvi = (screenconvi + 1) % 2;
if(profile)
timing();
}
void
flushaudio(int (*audioout)(void))
{
static vlong old, delta;
vlong new, diff;
if(audioout == nil || audioout() < 0 && !warp10){
new = nsec();
diff = 0;
if(old != 0){
diff = BILLION/60 - (new - old) - delta;
if(diff >= MILLION)
sleep(diff/MILLION);
}
old = nsec();
if(diff > 0){
diff = (old - new) - (diff / MILLION) * MILLION;
delta += (diff - delta) / 100;
}
}
if(framestep){
paused = 1;
qlock(&pauselock);
framestep = 0;
}
}
void
regkeyfn(Rune r, void (*fn)(void))
{
Kfn *kp;
for(kp=&kfn; kp->n!=nil; kp=kp->n)
;
kp->n = emalloc(sizeof *kp);
kp->n->r = r;
kp->n->fn = fn;
}
void
regkey(char *joyk, Rune r, int k)
{
Kfn *kp;
for(kp=&kkn; kp->n!=nil; kp=kp->n)
;
kp->n = emalloc(sizeof *kp);
strncpy(kp->n->joyk, joyk, sizeof(kp->n->joyk)-1);
if(strcmp(joyk, "up") == 0 || strcmp(joyk, "down") == 0)
ax0 |= k;
if(strcmp(joyk, "left") == 0 || strcmp(joyk, "right") == 0)
ax1 |= k;
kp->n->r = r;
kp->n->k = k;
}
void
initemu(int dx, int dy, int bpp, ulong chan, int dokey, void(*kproc)(void*))
{
vwdx = dx;
vwdy = dy;
vwchan = chan;
vwbpp = bpp;
if(initdraw(nil, nil, nil) < 0)
sysfatal("initdraw: %r");
mc = initmouse(nil, screen);
if(mc == nil)
sysfatal("initmouse: %r");
if(dokey)
proccreate(kproc != nil ? kproc : keyproc, nil, mainstacksize);
if(kproc == nil)
proccreate(joyproc, nil, mainstacksize);
bg = allocimage(display, Rect(0, 0, 1, 1), screen->chan, 1, 0xCCCCCCFF);
scale = fixscale;
conv = chancreate(sizeof(uchar*), 0);
sync[0] = chancreate(1, 0);
sync[1] = chancreate(1, 0);
proccreate(screenproc, nil, mainstacksize);
screeninit();
}