ref: 8294be6e7c9032e3c472018b53154d5b4faec00c
dir: /os/mpc/screen.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
enum {
Backgnd = 0xFF, /* white */
Foregnd = 0x00, /* black */
};
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,
},
};
static Memdata xgdata;
static Memimage xgscreen =
{
{0, 0, 0, 0}, /* r */
{0, 0, 0, 0}, /* clipr */
8, /* depth */
1, /* nchan */
CMAP8, /* chan */
nil, /* cmap */
&xgdata, /* data */
0, /* zero */
0, /* width */
nil, /* layer */
0, /* flags */
};
int novgascreen; /* optionally set by configuration file */
static int lcdpdpar; /* value to load into io->pdpar */
Memimage *gscreen;
Memimage *conscol;
Memimage *back;
static Memsubfont *memdefont;
static Lock palettelock; /* access to DAC registers */
static Lock screenlock;
static int h;
static Point curpos;
static Rectangle window;
typedef struct SWcursor SWcursor;
static SWcursor *swc = nil;
SWcursor* swcurs_create(ulong *, int, int, Rectangle, int);
void swcurs_destroy(SWcursor*);
void swcurs_enable(SWcursor*);
void swcurs_disable(SWcursor*);
void swcurs_hide(SWcursor*);
void swcurs_unhide(SWcursor*);
void swcurs_load(SWcursor*, Cursor*);
static void screenputc(char*);
static void scroll(void);
static void setscreen(Mode*);
static void cursorlock(Rectangle);
static void cursorunlock(void);
static void lcdinit(Mode*);
static void lcdsetrgb(int, ulong, ulong, ulong);
/*
* Called by main().
*/
void
screeninit(void)
{
Mode m;
novgascreen=1; return;
/* default size and parameters */
memset(&m.lcd, 0, sizeof(m.lcd));
m.x = 640;
m.y = 480;
m.d = 3;
if(novgascreen == 0 && archlcdmode(&m) >= 0){
memdefont = getmemdefont();
setscreen(&m);
}
}
/*
* On 8 bit displays, load the default color map
*/
void
graphicscmap(int invert)
{
int num, den, i, j;
int r, g, b, cr, cg, cb, v;
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)
setcolor(255-i-(j&15),
cr*0x01010101, cg*0x01010101, cb*0x01010101);
else
setcolor(i+(j&15),
cr*0x01010101, cg*0x01010101, cb*0x01010101);
}
}
}
/*
* reconfigure screen shape
*/
static void
setscreen(Mode *mode)
{
int h;
if(swc)
swcurs_destroy(swc);
gscreen = &xgscreen;
xgdata.ref = 1;
lcdinit(mode);
xgdata.bdata = (uchar*)mode->aperture;
if(xgdata.bdata == nil)
panic("setscreen: vga soft memory");
gscreen->r = Rect(0, 0, mode->x, mode->y);
gscreen->clipr = gscreen->r;
gscreen->depth = 1<<mode->d;
gscreen->width = wordsperline(gscreen->r, gscreen->depth);
memimageinit();
memdefont = getmemdefont();
memsetchan(gscreen, CMAP8);
back = memwhite;
conscol = memblack;
memimagedraw(gscreen, gscreen->r, memwhite, ZP, memopaque, ZP, SoverD);
graphicscmap(0);
/* get size for a system window */
h = memdefont->height;
window = insetrect(gscreen->r, 4);
window.max.y = window.min.y+(Dy(window)/h)*h;
curpos = window.min;
// screenclear();
graphicscmap(0);
// swc = swcurs_create(gscreendata.data, gscreen.width, gscreen.ldepth, gscreen.r, 1);
drawcursor(nil);
}
enum {
ScreenCached = 1 /* non-zero if screen region not write-through */
};
void
flushmemscreen(Rectangle r)
{
if(rectclip(&r, gscreen->r) == 0)
return;
if(r.min.x >= r.max.x || r.min.y >= r.max.y)
return;
if(ScreenCached)
dcflush((ulong*)gscreen->data->bdata + gscreen->width*r.min.y, gscreen->width*Dy(r));
}
/*
* export screen to interpreter
*/
uchar*
attachscreen(Rectangle *r, ulong *chan, int* d, int *width, int *softscreen)
{
*r = gscreen->r;
*d = gscreen->depth;
*chan = gscreen->chan;
*width = gscreen->width;
*softscreen = ScreenCached;
return (uchar*)gscreen->data->bdata;
}
void
detachscreen(void)
{
}
/*
* write a string to the screen
*/
void
screenputs(char *s, int n)
{
int i;
Rune r;
char buf[4];
if(novgascreen || xgdata.bdata == nil || memdefont == nil)
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);
}
/* Only OK for now */
flushmemscreen(gscreen->r);
unlock(&screenlock);
}
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);
memimagedraw(gscreen, r, gscreen, p, nil, p, SoverD);
flushmemscreen(r);
r = Rpt(Pt(window.min.x, window.max.y-o), window.max);
memimagedraw(gscreen, r, back, ZP, nil, ZP, SoverD);
flushmemscreen(r);
curpos.y -= o;
}
static void
clearline(void)
{
Rectangle r;
int yloc = curpos.y;
r = Rpt(Pt(window.min.x, window.min.y + yloc),
Pt(window.max.x, window.min.y+yloc+memdefont->height));
memimagedraw(gscreen, r, back, ZP, nil, ZP, SoverD);
}
static 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;
/* fall through */
case '\r':
xp = xbuf;
curpos.x = window.min.x;
break;
case '\t':
if(curpos.x == window.min.x)
clearline();
p = memsubfontwidth(memdefont, " ");
w = p.x;
*xp++ = curpos.x;
pos = (curpos.x-window.min.x)/w;
pos = 8-(pos%8);
r = Rect(curpos.x, curpos.y, curpos.x+pos*w, curpos.y+h);
memimagedraw(gscreen, r, back, ZP, nil, ZP, SoverD);
flushmemscreen(r);
curpos.x += pos*w;
break;
case '\b':
if(xp <= xbuf)
break;
xp--;
r = Rpt(Pt(*xp, curpos.y), Pt(curpos.x, curpos.y + h));
memimagedraw(gscreen, r, back, ZP, nil, ZP, SoverD);
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");
if(curpos.x == window.min.x)
clearline();
if(xp < xbuf+nelem(xbuf))
*xp++ = curpos.x;
r = Rect(curpos.x, curpos.y, curpos.x+w, curpos.y+h);
memimagedraw(gscreen, r, back, ZP, nil, ZP, SoverD);
memimagestring(gscreen, curpos, conscol, ZP, memdefont, buf);
flushmemscreen(r);
curpos.x += w;
}
}
int
setcolor(ulong p, ulong r, ulong g, ulong b)
{
ulong x;
if(gscreen->depth >= 8)
x = 0xFF;
else
x = 0xF;
p &= x;
p ^= x;
lock(&palettelock);
lcdsetrgb(p, r, g, b);
unlock(&palettelock);
return ~0;
}
void
getcolor(ulong p, ulong *pr, ulong *pg, ulong *pb)
{
/* TO DO */
*pr = *pg = *pb = 0;
}
/*
* See section 5.2.1 (page 5-6) of the MPC823 manual
*/
static uchar lcdclock[17] = { /* (a<<2)|b => divisor of (1<<a)*((b<<1)+1) */
0, 0, (1<<2), 1,
(2<<2), 2, (1<<2)|1, 3,
(3<<2), (1<<2)|2, (1<<2)|2, (2<<2)|1,
(2<<2)|1, (1<<2)|3, (1<<2)|3, (4<<2),
(4<<2)
};
enum {
/* lccr */
Enable = 1<<0,
/* lchcr */
BigEndian = 1<<24,
AT7 = 7<<21, /* access type */
/* sdcr */
LAM = 1<<6, /* ``LCD aggressive mode'' */
};
/*
* initialise MPC8xx LCD controller incorporating board or display-specific values in Mode.lcd
*/
static void
lcdinit(Mode *mode)
{
IMM *io;
int i, d;
long hz;
io = m->iomem;
mode->aperture = xspanalloc(mode->x*mode->y, 16, 0);
mode->apsize = mode->x*mode->y;
io->sdcr = 1; /* MPC823 errata: turn off LAM before disabling controller */
eieio();
io->lcfaa = PADDR(mode->aperture);
io->lccr = (((mode->x*mode->y*(1<<mode->d)+127)/128) << 17) | (mode->d << 5) | mode->lcd.flags;
switch(mode->d){
default:
case 0:
/* monochrome/greyscale identity map */
for(i=0; i<16; i++)
io->lcdmap[i] = i;
break;
case 2:
/* 4-bit grey scale map */
for(i=0; i<16; i++)
io->lcdmap[0] = (i<<8)|(i<<4)|i;
break;
case 3:
/* 8-bit linear map */
for(i=0; i<256; i++)
io->lcdmap[i] = (i<<8)|(i<<4)|i;
break;
}
io->lcvcr = (mode->y << 11) | (mode->lcd.vpw<<28) | (mode->lcd.ac<<21) | mode->lcd.wbf;
io->lchcr = (mode->x<<10) | BigEndian | mode->lcd.wbl;
hz = m->cpuhz;
d = hz/mode->lcd.freq;
if(hz/d > mode->lcd.freq)
d++;
if(d >= 16)
d = 16;
/*
* enable LCD outputs
*/
io->pddat = 0;
lcdpdpar = 0x1fff & ~mode->lcd.notpdpar;
io->pdpar = lcdpdpar;
io->pddir = 0x1fff;
io->pbpar |= IBIT(31) | IBIT(19) | IBIT(17);
io->pbdir |= IBIT(31) | IBIT(19) | IBIT(17);
io->pbodr &= ~(IBIT(31) | IBIT(19) | IBIT(17));
/*
* with the data cache off, early revisions of the 823 did not require
* the `aggressive' DMA priority to avoid flicker, but flicker is obvious
* on the 823A when the cache is on, so LAM is now set
*/
io->sdcr = (io->sdcr & ~0xF) | LAM; /* LAM=1, LAID=0, RAID=0 */
// gscreen.width = gscreen.width; /* access external memory before enabling (mpc823 errata) */
eieio();
io->sccrk = KEEP_ALIVE_KEY;
eieio();
io->sccr = (io->sccr & ~0x1F) | lcdclock[d];
eieio();
io->sccrk= ~KEEP_ALIVE_KEY;
io->lcsr = 7; /* clear status */
eieio();
io->lccr |= Enable;
archbacklight(1);
}
static void
lcdsetrgb(int p, ulong r, ulong g, ulong b)
{
r >>= 28;
g >>= 28;
b >>= 28;
m->iomem->lcdmap[p&0xFF] = (r<<8) | (g<<4) | b;
}
void
blankscreen(int blank)
{
USED(blank); /* TO DO */
}
/*
* enable/disable LCD panel (eg, when using video subsystem)
*/
void
lcdpanel(int on)
{
IMM *io;
if(on){
archbacklight(1);
io = ioplock();
io->pddat = 0;
io->pdpar = lcdpdpar;
io->pddir = 0x1fff;
io->lccr |= Enable;
iopunlock();
}else{
io = ioplock();
io->sdcr = 1; /* MPC823 errata: turn off LAM before disabling controller */
eieio();
io->pddir = 0;
eieio();
io->lccr &= ~Enable;
iopunlock();
archbacklight(0);
}
}
/*
* Software cursor code. Interim version (for baseline).
* we may want to replace code here by memdraw primitives.
*/
enum {
CUR_ENA = 0x01, /* cursor is enabled */
CUR_DRW = 0x02, /* cursor is currently drawn */
CUR_SWP = 0x10, /* bit swap */
CURSWID = 16,
CURSHGT = 16,
};
typedef struct SWcursor {
ulong *fb; /* screen frame buffer */
Rectangle r;
int d; /* ldepth of screen */
int width; /* width of screen in ulongs */
int x;
int y;
int hotx;
int hoty;
uchar cbwid; /* cursor byte width */
uchar f; /* flags */
uchar cwid;
uchar chgt;
int hidecount;
uchar data[CURSWID*CURSHGT];
uchar mask[CURSWID*CURSHGT];
uchar save[CURSWID*CURSHGT];
} SWcursor;
static Rectangle cursoroffrect;
static int cursorisoff;
static void swcursorflush(int, int);
static void swcurs_draw_or_undraw(SWcursor *);
static void
cursorupdate0(void)
{
int inrect, x, y;
Point m;
m = mousexy();
x = m.x - swc->hotx;
y = m.y - swc->hoty;
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)
swcurs_hide(swc);
else {
swc->hidecount = 0;
swcurs_draw_or_undraw(swc);
}
swcursorflush(m.x, m.y);
}
void
cursorupdate(Rectangle r)
{
lock(&screenlock);
r.min.x -= 16;
r.min.y -= 16;
cursoroffrect = r;
if (swc)
cursorupdate0();
unlock(&screenlock);
}
void
cursorenable(void)
{
Point m;
lock(&screenlock);
if(swc) {
swcurs_enable(swc);
m = mousexy();
swcursorflush(m.x, m.y);
}
unlock(&screenlock);
}
void
cursordisable(void)
{
Point m;
lock(&screenlock);
if(swc) {
swcurs_disable(swc);
m = mousexy();
swcursorflush(m.x, m.y);
}
unlock(&screenlock);
}
void
drawcursor(Drawcursor* c)
{
Point p;
Cursor curs, *cp;
int j, i, h, bpl;
uchar *bc, *bs, *cclr, *cset;
if(!swc)
return;
/* Set the default system cursor */
if(!c || c->data == nil)
cp = &arrow /*&crosshair_black*/;
else {
cp = &curs;
p.x = c->hotx;
p.y = c->hoty;
cp->offset = p;
bpl = bytesperline(Rect(c->minx, c->miny, c->maxx, c->maxy), 1);
h = (c->maxy-c->miny)/2;
if(h > 16)
h = 16;
bc = c->data;
bs = c->data + h*bpl;
cclr = cp->clr;
cset = cp->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;
}
}
if(swc) {
swcurs_load(swc, cp);
p = mousexy();
swcursorflush(p.x, p.y);
}
}
SWcursor*
swcurs_create(ulong *fb, int width, int ldepth, Rectangle r, int bitswap)
{
SWcursor *swc = (SWcursor*)malloc(sizeof(SWcursor));
swc->fb = fb;
swc->r = r;
swc->d = ldepth;
swc->width = width;
swc->f = bitswap ? CUR_SWP : 0;
swc->x = swc->y = 0;
swc->hotx = swc->hoty = 0;
swc->hidecount = 0;
return swc;
}
void
swcurs_destroy(SWcursor *swc)
{
swcurs_disable(swc);
free(swc);
}
static void
swcursorflush(int x, int y)
{
Rectangle r;
/* XXX a little too paranoid here */
r.min.x = x-16;
r.min.y = y-16;
r.max.x = x+17;
r.max.y = y+17;
flushmemscreen(r);
}
static void
swcurs_draw_or_undraw(SWcursor *swc)
{
uchar *p;
uchar *cs;
int w, vw;
int x1 = swc->r.min.x;
int y1 = swc->r.min.y;
int x2 = swc->r.max.x;
int y2 = swc->r.max.y;
int xp = swc->x - swc->hotx;
int yp = swc->y - swc->hoty;
int ofs;
if(((swc->f & CUR_ENA) && (swc->hidecount <= 0))
== ((swc->f & CUR_DRW) != 0))
return;
w = swc->cbwid*BI2BY/(1 << swc->d);
x1 = xp < x1 ? x1 : xp;
y1 = yp < y1 ? y1 : yp;
x2 = xp+w >= x2 ? x2 : xp+w;
y2 = yp+swc->chgt >= y2 ? y2 : yp+swc->chgt;
if(x2 <= x1 || y2 <= y1)
return;
p = (uchar*)(swc->fb + swc->width*y1)
+ x1*(1 << swc->d)/BI2BY;
y2 -= y1;
x2 = (x2-x1)*(1 << swc->d)/BI2BY;
vw = swc->width*BY2WD - x2;
w = swc->cbwid - x2;
ofs = swc->cbwid*(y1-yp)+(x1-xp);
cs = swc->save + ofs;
if((swc->f ^= CUR_DRW) & CUR_DRW) {
uchar *cm = swc->mask + ofs;
uchar *cd = swc->data + ofs;
while(y2--) {
x1 = x2;
while(x1--) {
*p = ((*cs++ = *p) & *cm++) ^ *cd++;
p++;
}
cs += w;
cm += w;
cd += w;
p += vw;
}
} else {
while(y2--) {
x1 = x2;
while(x1--)
*p++ = *cs++;
cs += w;
p += vw;
}
}
}
void
swcurs_hide(SWcursor *swc)
{
++swc->hidecount;
swcurs_draw_or_undraw(swc);
}
void
swcurs_unhide(SWcursor *swc)
{
if (--swc->hidecount < 0)
swc->hidecount = 0;
swcurs_draw_or_undraw(swc);
}
void
swcurs_enable(SWcursor *swc)
{
swc->f |= CUR_ENA;
swcurs_draw_or_undraw(swc);
}
void
swcurs_disable(SWcursor *swc)
{
swc->f &= ~CUR_ENA;
swcurs_draw_or_undraw(swc);
}
void
swcurs_load(SWcursor *swc, Cursor *c)
{
int i, k;
uchar *bc, *bs, *cd, *cm;
static uchar bdv[4] = {0,Backgnd,Foregnd,0xff};
static uchar bmv[4] = {0xff,0,0,0xff};
int bits = 1<<swc->d;
uchar mask = (1<<bits)-1;
int bswp = (swc->f&CUR_SWP) ? 8-bits : 0;
bc = c->clr;
bs = c->set;
swcurs_hide(swc);
cd = swc->data;
cm = swc->mask;
swc->hotx = c->offset.x;
swc->hoty = c->offset.y;
swc->chgt = CURSHGT;
swc->cwid = CURSWID;
swc->cbwid = CURSWID*(1<<swc->d)/BI2BY;
for(i = 0; i < CURSWID/BI2BY*CURSHGT; i++) {
uchar bcb = *bc++;
uchar bsb = *bs++;
for(k=0; k<BI2BY;) {
uchar cdv = 0;
uchar cmv = 0;
int z;
for(z=0; z<BI2BY; z += bits) {
int n = ((bsb&(0x80))|((bcb&(0x80))<<1))>>7;
int s = z^bswp;
cdv |= (bdv[n]&mask) << s;
cmv |= (bmv[n]&mask) << s;
bcb <<= 1;
bsb <<= 1;
k++;
}
*cd++ = cdv;
*cm++ = cmv;
}
}
swcurs_unhide(swc);
}