ref: 8a45afd47d2545b2d85aecf9ec5af90cba3905d3
dir: /sys/src/9/imx8/screen.c/
#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,
};
Memimage *gscreen;
static ulong *fbraw;
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);
enum
{
CMaccelerated,
CMlinear,
};
static Cmdtab mousectlmsg[] =
{
CMaccelerated, "accelerated", 0,
CMlinear, "linear", 1,
};
void
mousectl(Cmdbuf *cb)
{
Cmdtab *ct;
ct = lookupcmd(cb, mousectlmsg, nelem(mousectlmsg));
switch(ct->index){
case CMaccelerated:
mouseaccelerate(cb->nf == 1? 1: atoi(cb->f[1]));
break;
case CMlinear:
mouseaccelerate(0);
break;
}
}
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;
uchar *scrd;
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;
scrd = gscreen->data->bdata;
if(dst->data->bdata == scrd)
swcursoravoid(par->r);
if(src && src->data->bdata == scrd)
swcursoravoid(par->sr);
if(mask && mask->data->bdata == scrd)
swcursoravoid(par->mr);
return 0;
}
void*
screeninit(int width, int height, int depth)
{
ulong chan;
switch(depth){
default:
return nil;
case 32:
chan = XRGB32;
break;
case 24:
chan = RGB24;
break;
case 16:
chan = RGB16;
break;
}
memimageinit();
gscreen = allocmemimage(Rect(0, 0, width, height), chan);
if(gscreen == nil)
return nil;
conf.monitor = 1;
fbraw = ucalloc(PGROUND(gscreen->width*sizeof(ulong)*height));
memdefont = getmemdefont();
screenwin();
myscreenputs(kmesg.buf, kmesg.n);
screenputs = myscreenputs;
swcursorinit();
return fbraw;
}
void
flushmemscreen(Rectangle r)
{
int pitch, n;
ulong *d, *s;
if(!rectclip(&r, gscreen->r))
return;
s = wordaddr(gscreen, r.min);
d = fbraw + (s - wordaddr(gscreen, gscreen->r.min));
n = bytesperline(r, gscreen->depth);
pitch = wordsperline(gscreen->r, gscreen->depth);
while(r.min.y++ < r.max.y){
memmove(d, s, n);
d += pitch;
s += pitch;
}
}
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 = 1;
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;
}
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 = memblack;
conscol = memwhite;
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 = gscreen->r;
memimagedraw(gscreen, r, memwhite, ZP, memopaque, ZP, S);
window = insetrect(r, 4);
memimagedraw(gscreen, window, memblack, 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;
}
}