ref: 4d69aacea023546a7150d92e147e531c38de822f
dir: /sys/src/9/bcm/screen.c/
/*
* bcm2385 framebuffer
*/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#define Image IMAGE
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
enum {
Tabstop = 4,
Scroll = 8,
Wid = 1024,
Ht = 768,
Depth = 16,
};
Memimage *gscreen;
static Memdata xgdata;
static Memimage xgscreen =
{
{ 0, 0, Wid, Ht }, /* r */
{ 0, 0, Wid, Ht }, /* clipr */
Depth, /* depth */
3, /* nchan */
RGB16, /* chan */
nil, /* cmap */
&xgdata, /* data */
0, /* zero */
0, /* width in words of a single scan line */
0, /* layer */
0, /* flags */
};
static Memimage *conscol;
static Memimage *back;
static Memsubfont *memdefont;
static Lock screenlock;
static Point curpos;
static int h, w;
static Rectangle window;
static void myscreenputs(char *s, int n);
static void screenputc(char *buf);
static void screenwin(void);
/* called from devmouse */
void
cursoron(void)
{
swcursorhide(0);
swcursordraw(mousexy());
}
void
cursoroff(void)
{
swcursorhide(0);
}
void
setcursor(Cursor* curs)
{
swcursorload(curs);
}
int
hwdraw(Memdrawparam *par)
{
Memimage *dst, *src, *mask;
if((dst = par->dst) == nil || dst->data == nil)
return 0;
if((src = par->src) && src->data == nil)
src = nil;
if((mask = par->mask) && mask->data == nil)
mask = nil;
if(dst->data->bdata == xgdata.bdata)
swcursoravoid(par->r);
if(src && src->data->bdata == xgdata.bdata)
swcursoravoid(par->sr);
if(mask && mask->data->bdata == xgdata.bdata)
swcursoravoid(par->mr);
return 0;
}
static int
screensize(void)
{
char *p;
char *f[3];
int width, height, depth;
p = getconf("vgasize");
if(p == nil || getfields(p, f, nelem(f), 0, "x") != nelem(f) ||
(width = atoi(f[0])) < 16 || (height = atoi(f[1])) <= 0 ||
(depth = atoi(f[2])) <= 0)
return -1;
xgscreen.r.max = Pt(width, height);
xgscreen.depth = depth;
return 0;
}
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 = RGB24;
break;
case 32:
chan = XRGB32;
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();
myscreenputs(kmesg.buf, kmesg.n);
screenputs = myscreenputs;
swcursorinit();
}
void
flushmemscreen(Rectangle)
{
}
Memdata*
attachscreen(Rectangle *r, ulong *chan, int* d, int *width, int *softscreen)
{
if(gscreen == nil)
return nil;
*r = gscreen->r;
*d = gscreen->depth;
*chan = gscreen->chan;
*width = gscreen->width;
*softscreen = 0;
gscreen->data->ref++;
return gscreen->data;
}
void
getcolor(ulong p, ulong *pr, ulong *pg, ulong *pb)
{
USED(p, pr, pg, pb);
}
int
setcolor(ulong p, ulong r, ulong g, ulong b)
{
USED(p, r, g, b);
return 0;
}
void
blankscreen(int blank)
{
fbblank(blank);
}
static void
myscreenputs(char *s, int n)
{
int i;
Rune r;
char buf[4];
if(!islo()) {
/* don't deadlock trying to print in interrupt */
if(!canlock(&screenlock))
return;
}
else
lock(&screenlock);
while(n > 0){
i = chartorune(&r, s);
if(i == 0){
s++;
--n;
continue;
}
memmove(buf, s, i);
buf[i] = 0;
n -= i;
s += i;
screenputc(buf);
}
unlock(&screenlock);
}
static void
screenwin(void)
{
char *greet;
Memimage *orange;
Point p, q;
Rectangle r;
back = memwhite;
conscol = memblack;
orange = allocmemimage(Rect(0, 0, 1, 1), RGB16);
orange->flags |= Frepl;
orange->clipr = gscreen->r;
orange->data->bdata[0] = 0x40; /* magic: colour? */
orange->data->bdata[1] = 0xfd; /* magic: colour? */
w = memdefont->info[' '].width;
h = memdefont->height;
r = insetrect(gscreen->r, 4);
memimagedraw(gscreen, r, memblack, ZP, memopaque, ZP, S);
window = insetrect(r, 4);
memimagedraw(gscreen, window, memwhite, ZP, memopaque, ZP, S);
memimagedraw(gscreen, Rect(window.min.x, window.min.y,
window.max.x, window.min.y + h + 5 + 6), orange, ZP, nil, ZP, S);
freememimage(orange);
window = insetrect(window, 5);
greet = " Plan 9 Console ";
p = addpt(window.min, Pt(10, 0));
q = memsubfontwidth(memdefont, greet);
memimagestring(gscreen, p, conscol, ZP, memdefont, greet);
flushmemscreen(r);
window.min.y += h + 6;
curpos = window.min;
window.max.y = window.min.y + ((window.max.y - window.min.y) / h) * h;
}
static void
scroll(void)
{
int o;
Point p;
Rectangle r;
o = Scroll*h;
r = Rpt(window.min, Pt(window.max.x, window.max.y-o));
p = Pt(window.min.x, window.min.y+o);
memimagedraw(gscreen, r, gscreen, p, nil, p, S);
flushmemscreen(r);
r = Rpt(Pt(window.min.x, window.max.y-o), window.max);
memimagedraw(gscreen, r, back, ZP, nil, ZP, S);
flushmemscreen(r);
curpos.y -= o;
}
static void
screenputc(char *buf)
{
int w;
uint pos;
Point p;
Rectangle r;
static int *xp;
static int xbuf[256];
if (xp < xbuf || xp >= &xbuf[nelem(xbuf)])
xp = xbuf;
switch (buf[0]) {
case '\n':
if (curpos.y + h >= window.max.y)
scroll();
curpos.y += h;
screenputc("\r");
break;
case '\r':
xp = xbuf;
curpos.x = window.min.x;
break;
case '\t':
p = memsubfontwidth(memdefont, " ");
w = p.x;
if (curpos.x >= window.max.x - Tabstop * w)
screenputc("\n");
pos = (curpos.x - window.min.x) / w;
pos = Tabstop - pos % Tabstop;
*xp++ = curpos.x;
r = Rect(curpos.x, curpos.y, curpos.x + pos * w, curpos.y + h);
memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S);
flushmemscreen(r);
curpos.x += pos * w;
break;
case '\b':
if (xp <= xbuf)
break;
xp--;
r = Rect(*xp, curpos.y, curpos.x, curpos.y + h);
memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S);
flushmemscreen(r);
curpos.x = *xp;
break;
case '\0':
break;
default:
p = memsubfontwidth(memdefont, buf);
w = p.x;
if (curpos.x >= window.max.x - w)
screenputc("\n");
*xp++ = curpos.x;
r = Rect(curpos.x, curpos.y, curpos.x + w, curpos.y + h);
memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S);
memimagestring(gscreen, curpos, conscol, ZP, memdefont, buf);
flushmemscreen(r);
curpos.x += w;
break;
}
}