ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: /os/js/screen.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "io.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include <draw.h>
#include <memdraw.h>
#include <memlayer.h>
#include <cursor.h>
#include "softcursor.h"
#include "screen.h"
#define Backgnd (0xFF)
ulong consbits = 0xC0;
Memdata consdata = {
nil,
&consbits
};
Memimage conscol =
{
{ 0, 0, 1, 1 },
{ -100000, -100000, 100000, 100000 },
3,
1,
&consdata,
0,
1
};
ulong onesbits = ~0;
Memdata onesdata = {
nil,
&onesbits,
};
Memimage xones =
{
{ 0, 0, 1, 1 },
{ -100000, -100000, 100000, 100000 },
3,
1,
&onesdata,
0,
1
};
Memimage *memones = &xones;
ulong zerosbits = 0;
Memdata zerosdata = {
nil,
&zerosbits,
};
Memimage xzeros =
{
{ 0, 0, 1, 1 },
{ -100000, -100000, 100000, 100000 },
3,
1,
&zerosdata,
0,
1
};
Memimage *memzeros = &xzeros;
ulong backbits = (Backgnd<<24)|(Backgnd<<16)|(Backgnd<<8)|Backgnd;
Memdata backdata = {
nil,
&backbits
};
Memimage xback =
{
{ 0, 0, 1, 1 },
{ -100000, -100000, 100000, 100000 },
3,
1,
&backdata,
0,
1
};
Memimage *back = &xback;
Video *vid;
static Memsubfont *memdefont;
static Lock screenlock;
Memimage gscreen;
Memdata gscreendata;
static Point curpos;
static Rectangle window;
static Vctlr* vctlr;
static Cursor arrow = {
{ -1, -1 },
{ 0xFF, 0xFF, 0x80, 0x01, 0x80, 0x02, 0x80, 0x0C,
0x80, 0x10, 0x80, 0x10, 0x80, 0x08, 0x80, 0x04,
0x80, 0x02, 0x80, 0x01, 0x80, 0x02, 0x8C, 0x04,
0x92, 0x08, 0x91, 0x10, 0xA0, 0xA0, 0xC0, 0x40,
},
{ 0x00, 0x00, 0x7F, 0xFE, 0x7F, 0xFC, 0x7F, 0xF0,
0x7F, 0xE0, 0x7F, 0xE0, 0x7F, 0xF0, 0x7F, 0xF8,
0x7F, 0xFC, 0x7F, 0xFE, 0x7F, 0xFC, 0x73, 0xF8,
0x61, 0xF0, 0x60, 0xE0, 0x40, 0x40, 0x00, 0x00,
},
};
void
graphicscmap(int invert)
{
int num, den, i, j;
int r, g, b, cr, cg, cb, v;
if(vctlr->setcolor == nil)
return;
for(r=0,i=0;r!=4;r++) for(v=0;v!=4;v++,i+=16){
for(g=0,j=v-r;g!=4;g++) for(b=0;b!=4;b++,j++){
den=r;
if(g>den) den=g;
if(b>den) den=b;
if(den==0) /* divide check -- pick grey shades */
cr=cg=cb=v*17;
else{
num=17*(4*den+v);
cr=r*num/den;
cg=g*num/den;
cb=b*num/den;
}
if(invert)
vctlr->setcolor(255-i-(j&15),
cr*0x01010101,
cg*0x01010101,
cb*0x01010101);
else
vctlr->setcolor(i+(j&15),
cr*0x01010101,
cg*0x01010101,
cb*0x01010101);
}
}
}
static char s1[] =
{
0x00, 0x00, 0xC0, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
void
dacinit(void)
{
int i;
/* Control registers */
vid->addr = 0x01 << 24;
vid->color = 0x02 << 24;
for(i = 0; i < sizeof s1; i++)
vid->cntrl = s1[i] << 24;
/* Cursor programming */
vid->addr = 0x00 << 24;
vid->color = 0x03 << 24;
vid->cntrl = 0xC0 << 24;
for(i = 0; i < 12; i++)
vid->cntrl = 0 << 24;
/* Load Cursor Ram */
vid->addr = 0x00 << 24;
vid->color = 0x04 << 24;
for(i = 0; i < 0x400; i++)
vid->cntrl = 0xff << 24;
graphicscmap(1);
/* Overlay Palette Ram */
vid->addr = 0x00 << 24;
vid->color = 0x01 << 24;
for(i = 0; i < 0x10; i++) {
vid->cntrl = 0xff << 24;
vid->cntrl = 0xff << 24;
vid->cntrl = 0xff << 24;
}
/* Overlay Palette Ram */
vid->addr = 0x81;
vid->color = 0x01;
for(i = 0; i < 3; i++) {
vid->cntrl = 0xff << 24;
vid->cntrl = 0xff << 24;
vid->cntrl = 0xff << 24;
}
}
void
vctlrinit(int x, int y, int d)
{
int h;
ulong va;
if(vctlr == nil){
/*
* find a controller somehow
* and call its init routine
*/
extern Vctlr FSV;
vctlr = FSV.init(0, x, y, d);
vctlr->load(&arrow);
}
if(vctlr == nil)
panic("%s",Ebadarg);
gscreen.data = &gscreendata;
gscreen.r.min = Pt(0, 0);
gscreen.r.max = Pt(vctlr->x, vctlr->y);
gscreen.clipr = gscreen.r;
gscreen.ldepth = vctlr->d;
gscreen.repl = 0;
va = kmapsbus(FSVSLOT); /* FSV is in slot 2 */
gscreendata.data = (ulong *)(va+0x800000); /* Framebuffer Magic */
gscreen.width = (vctlr->x *(1<<gscreen.ldepth)+31)/32;
h = memdefont->height;
vid = (Video*)(va+0x240000); /* RAMDAC Magic */
memset(gscreendata.data, Backgnd, vctlr->x*vctlr->y);
window = gscreen.r;
window.max.x = vctlr->x;
window.max.y = (vctlr->y/h) * h;
curpos = window.min;
if (gscreen.ldepth == 3){
dacinit();
}
memset(gscreendata.data, Backgnd, vctlr->x*vctlr->y);
window = gscreen.r;
window.max.x = vctlr->x;
window.max.y = (vctlr->y/h) * h;
curpos = window.min;
}
void
screeninit(void)
{
memdefont = getmemdefont();
vctlrinit(1024, 768, 3);
}
ulong*
attachscreen(Rectangle *r, int *ld, int *width, int *softscreen)
{
*r = gscreen.r;
*ld = gscreen.ldepth;
*width = gscreen.width;
*softscreen = 0;
return gscreendata.data;
}
void
detachscreen(void)
{
}
void
flushmemscreen(Rectangle)
{
}
static void
scroll(void)
{
int o;
Point p;
Rectangle r;
o = 4*memdefont->height;
r = Rpt(window.min, Pt(window.max.x, window.max.y-o));
p = Pt(window.min.x, window.min.y+o);
memdraw(&gscreen, r, &gscreen, p, memones, p);
r = Rpt(Pt(window.min.x, window.max.y-o), window.max);
memdraw(&gscreen, r, back, memzeros->r.min, memones, memzeros->r.min);
curpos.y -= o;
}
void
screenputc(char *buf)
{
Point p;
int h, w, pos;
Rectangle r;
static int *xp;
static int xbuf[256];
h = memdefont->height;
if(xp < xbuf || xp >= &xbuf[sizeof(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;
*xp++ = curpos.x;
pos = (curpos.x-window.min.x)/w;
pos = 8-(pos%8);
curpos.x += pos*w;
break;
case '\b':
if(xp <= xbuf)
break;
xp--;
r = Rpt(Pt(*xp, curpos.y), Pt(curpos.x, curpos.y + h));
memdraw(&gscreen, r, back, back->r.min, memones, back->r.min);
curpos.x = *xp;
break;
default:
p = memsubfontwidth(memdefont, buf);
w = p.x;
if(curpos.x >= window.max.x-w)
screenputc("\n");
*xp++ = curpos.x;
memimagestring(&gscreen, curpos, &conscol, memdefont, buf);
curpos.x += w;
}
}
void
screenputs(char *s, int n)
{
int i;
Rune r;
char buf[4];
extern int cold;
if(!cold)
return;
if(islo() == 0) {
/* 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);
}
void
cursorenable(void)
{
if(vctlr->enable == nil)
return;
vctlr->enable();
if(!vctlr->isloaded())
vctlr->load(&arrow);
}
void
cursordisable(void)
{
if(vctlr->disable == nil)
return;
vctlr->disable();
}
static Rectangle cursoroffrect;
static int cursorisoff;
static Point hot;
void
cursorupdate0(void)
{
int inrect, x, y;
x = mouse.x - hot.x;
y = mouse.y - hot.y;
inrect = (x >= cursoroffrect.min.x && x < cursoroffrect.max.x
&& y >= cursoroffrect.min.y && y < cursoroffrect.max.y);
if (cursorisoff == inrect)
return;
cursorisoff = inrect;
if (inrect)
cursordisable();
else
cursorenable();
}
void
cursorupdate(Rectangle r)
{
lock(&screenlock);
r.min.x -= 16;
r.min.y -= 16;
cursoroffrect = r;
if (swcursor)
cursorupdate0();
unlock(&screenlock);
}
void
drawcursor(Drawcursor* c)
{
Cursor curs;
int j, i, h, bpl;
uchar *bc, *bs, *cclr, *cset;
if(vctlr->load == nil)
return;
/* Set the default system cursor */
if(c->data == nil) {
lock(&screenlock);
vctlr->load(&arrow);
unlock(&screenlock);
return;
}
hot.x = c->hotx;
hot.y = c->hoty;
curs.offset = hot;
bpl = bytesperline(Rect(c->minx, c->miny, c->maxx, c->maxy), 0);
h = (c->maxy-c->miny)/2;
if(h > 16)
h = 16;
bc = c->data;
bs = c->data + h*bpl;
cclr = curs.clr;
cset = curs.set;
for(i = 0; i < h; i++) {
for(j = 0; j < 2; j++) {
cclr[j] = bc[j];
cset[j] = bs[j];
}
bc += bpl;
bs += bpl;
cclr += 2;
cset += 2;
}
lock(&screenlock);
vctlr->load(&curs);
unlock(&screenlock);
}