void
screeninit(void)
{
uchar *fb;
fb = xspanalloc(Dx(xgscreen.r) * Dy(xgscreen.r) * 3, 64, 0);
print("%p\n", PADDR(fb));
memsetchan(&xgscreen, BGR24);
conf.monitor = 1;
xgdata.bdata = fb;
xgdata.ref = 1;
gscreen = &xgscreen;
gscreen->width = wordsperline(gscreen->r, gscreen->depth);
memimageinit();
}
Memimage*
allocmemimage(Rectangle r, ulong chan)
{
int d;
uchar *p;
ulong l, nw;
Memdata *md;
Memimage *i;
if((d = chantodepth(chan)) == 0) {
werrstr("bad channel descriptor %.8lux", chan);
return nil;
}
l = wordsperline(r, d);
nw = l*Dy(r);
md = malloc(sizeof(Memdata));
if(md == nil)
return nil;
md->ref = 1;
md->base = poolalloc(imagmem, sizeof(Memdata*)+(1+nw)*sizeof(ulong));
if(md->base == nil){
free(md);
return nil;
}
p = (uchar*)md->base;
*(Memdata**)p = md;
p += sizeof(Memdata*);
*(ulong*)p = getcallerpc(&r);
p += sizeof(ulong);
/* if this changes, memimagemove must change too */
md->bdata = p;
md->allocd = 1;
i = allocmemimaged(r, chan, md);
if(i == nil){
poolfree(imagmem, md->base);
free(md);
return nil;
}
md->imref = i;
return i;
}
Memimage*
allocmemimaged(Rectangle r, ulong chan, Memdata *md, void *X)
{
int d;
ulong l;
Memimage *i;
if(Dx(r) <= 0 || Dy(r) <= 0){
werrstr("bad rectangle %R", r);
return nil;
}
if((d = chantodepth(chan)) == 0) {
werrstr("bad channel descriptor %.8lux", chan);
return nil;
}
l = wordsperline(r, d);
i = mallocz(sizeof(Memimage), 1);
if(i == nil)
return nil;
i->X = X;
i->data = md;
i->zero = sizeof(ulong)*l*r.min.y;
if(r.min.x >= 0)
i->zero += (r.min.x*d)/8;
else
i->zero -= (-r.min.x*d+7)/8;
i->zero = -i->zero;
i->width = l;
i->r = r;
i->clipr = r;
i->flags = 0;
i->layer = nil;
i->cmap = memdefcmap;
if(memsetchan(i, chan) < 0){
free(i);
return nil;
}
return i;
}
void
screeninit(void)
{
uchar *fb;
int set;
ulong chan;
set = screensize() == 0;
fb = fbinit(set, &xgscreen.r.max.x, &xgscreen.r.max.y, &xgscreen.depth);
if(fb == nil){
print("can't initialise %dx%dx%d framebuffer \n",
xgscreen.r.max.x, xgscreen.r.max.y, xgscreen.depth);
return;
}
xgscreen.clipr = xgscreen.r;
switch(xgscreen.depth){
default:
print("unsupported screen depth %d\n", xgscreen.depth);
xgscreen.depth = 16;
/* fall through */
case 16:
chan = RGB16;
break;
case 24:
chan = BGR24;
break;
case 32:
chan = ARGB32;
break;
}
memsetchan(&xgscreen, chan);
conf.monitor = 1;
xgdata.bdata = fb;
xgdata.ref = 1;
gscreen = &xgscreen;
gscreen->width = wordsperline(gscreen->r, gscreen->depth);
memimageinit();
memdefont = getmemdefont();
screenwin();
screenputs = myscreenputs;
swcursorinit();
}
