ref: a39ae178fcc4387fe63efea4d15b34d52f4a13de
dir: /os/ipaq1110/screen.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include "io.h"
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
enum {
Backgnd = 0xFF, /* white */
Foregnd = 0x00, /* black */
};
#define DPRINT if(1)iprint
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 */
};
Memimage *gscreen;
Memimage *conscol;
Memimage *back;
Memsubfont *memdefont;
static Point curpos;
static Rectangle window;
typedef struct SWcursor SWcursor;
static Vdisplay *vd;
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*);
void swcursupdate(int, int, int, int);
static char printbuf[1024];
static int printbufpos = 0;
static void lcdscreenputs(char*, int);
static void screenpbuf(char*, int);
void (*screenputs)(char*, int) = screenpbuf;
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,
},
};
static ushort palette16[256];
static void (*flushpixels)(Rectangle, ulong*, int, ulong*, int);
static void flush8to4(Rectangle, ulong*, int, ulong*, int);
static void flush8to4r(Rectangle, ulong*, int, ulong*, int);
static void flush8to16(Rectangle, ulong*, int, ulong*, int);
static void flush8to16r(Rectangle, ulong*, int, ulong*, int);
/*
lccr0=000000b9 lccr1=0b100930 lccr2=0a0108ef lccr3=00300010
---
vd->wid=320 bwid=640 gscreen->width=60 fb=d0b7cb80 data=d0ba25c0
*/
int
setcolor(ulong p, ulong r, ulong g, ulong b)
{
if(vd->depth >= 8)
p &= 0xff;
else
p &= 0xf;
vd->colormap[p][0] = r;
vd->colormap[p][1] = g;
vd->colormap[p][2] = b;
palette16[p] = ((r>>(32-4))<<12)|((g>>(32-4))<<7)|((b>>(32-4))<<1);
lcd_setcolor(p, r, g, b);
return ~0;
}
void
getcolor(ulong p, ulong *pr, ulong *pg, ulong *pb)
{
if(vd->depth >= 8)
p = (p&0xff)^0xff;
else
p = (p&0xf)^0xf;
*pr = vd->colormap[p][0];
*pg = vd->colormap[p][1];
*pb = vd->colormap[p][2];
}
void
graphicscmap(int invert)
{
int num, den, i, j;
int r, g, b, cr, cg, cb, v, p;
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;
}
p = (i+(j&15));
if(invert)
p ^= 0xFF;
if(vd->depth == 4) {
if((p&0xf) != (p>>4))
continue;
p &= 0xf;
}
setcolor(p,
cr*0x01010101,
cg*0x01010101,
cb*0x01010101);
}
}
lcd_flush();
}
static uchar lum[256]={
0, 7, 15, 23, 39, 47, 55, 63, 79, 87, 95, 103, 119, 127, 135, 143,
154, 17, 9, 17, 25, 49, 59, 62, 68, 89, 98, 107, 111, 129, 138, 146,
157, 166, 34, 11, 19, 27, 59, 71, 69, 73, 99, 109, 119, 119, 139, 148,
159, 169, 178, 51, 13, 21, 29, 69, 83, 75, 78, 109, 120, 131, 128, 149,
28, 35, 43, 60, 68, 75, 83, 100, 107, 115, 123, 140, 147, 155, 163, 20,
25, 35, 40, 47, 75, 85, 84, 89, 112, 121, 129, 133, 151, 159, 168, 176,
190, 30, 42, 44, 50, 90, 102, 94, 97, 125, 134, 144, 143, 163, 172, 181,
194, 204, 35, 49, 49, 54, 105, 119, 103, 104, 137, 148, 158, 154, 175, 184,
56, 63, 80, 88, 96, 103, 120, 128, 136, 143, 160, 168, 175, 183, 40, 48,
54, 63, 69, 90, 99, 107, 111, 135, 144, 153, 155, 173, 182, 190, 198, 45,
50, 60, 70, 74, 100, 110, 120, 120, 150, 160, 170, 167, 186, 195, 204, 214,
229, 55, 66, 77, 79, 110, 121, 131, 129, 165, 176, 187, 179, 200, 210, 219,
84, 100, 108, 116, 124, 140, 148, 156, 164, 180, 188, 196, 204, 60, 68, 76,
82, 91, 108, 117, 125, 134, 152, 160, 169, 177, 195, 204, 212, 221, 66, 74,
80, 89, 98, 117, 126, 135, 144, 163, 172, 181, 191, 210, 219, 228, 238, 71,
76, 85, 95, 105, 126, 135, 145, 155, 176, 185, 195, 205, 225, 235, 245, 255,
};
void flushmemscreen(Rectangle r);
void
screenclear(void)
{
memimagedraw(gscreen, gscreen->r, memwhite, ZP, memopaque, ZP, SoverD);
curpos = window.min;
flushmemscreen(gscreen->r);
}
static void
setscreen(LCDmode *mode)
{
int h;
if(swc != nil)
swcurs_destroy(swc);
vd = lcd_init(mode);
if(vd == nil)
panic("can't initialise LCD");
if(lum[255] == 255) {
int i;
for(i=0; i<256; i++)
lum[i] >>= 4; /* could support depths other than 4 */
}
gscreen = &xgscreen;
xgdata.ref = 1;
if(conf.portrait == 0)
gscreen->r = Rect(0, 0, vd->x, vd->y);
else
gscreen->r = Rect(0, 0, vd->y, vd->x);
gscreen->clipr = gscreen->r;
gscreen->depth = 8;
gscreen->width = wordsperline(gscreen->r, gscreen->depth);
if(vd->depth == 4 || vd->depth == 16 || conf.portrait) { /* use 8 to 4 bit fakeout for speed */
if((xgdata.bdata = xspanalloc(gscreen->width*gscreen->r.max.y*BY2WD+CACHELINESZ, CACHELINESZ, 0)) == nil)
panic("can't alloc vidmem");
xgdata.bdata = minicached(xgdata.bdata);
if(conf.portrait == 0)
flushpixels = vd->depth==4? flush8to4: flush8to16;
else
flushpixels = vd->depth==4? flush8to4r: flush8to16r;
} else{
xgdata.bdata = (uchar*)vd->fb;
flushpixels = nil;
}
memimageinit();
memdefont = getmemdefont();
memsetchan(gscreen, CMAP8); /* TO DO: could now use RGB16 */
back = memwhite;
conscol = memblack;
memimagedraw(gscreen, gscreen->r, memwhite, ZP, memopaque, ZP, SoverD);
DPRINT("vd->wid=%d bwid=%d gscreen->width=%ld fb=%p data=%p\n",
vd->x, vd->bwid, gscreen->width, vd->fb, xgdata.bdata);
graphicscmap(0);
h = memdefont->height;
window = insetrect(gscreen->r, 4);
window.max.y = window.min.y+(Dy(window)/h)*h;
screenclear();
// swc = swcurs_create(gscreendata.data, gscreen.width, gscreen.ldepth, gscreen.r, 1);
drawcursor(nil);
}
void
screeninit(void)
{
LCDmode lcd;
memset(&lcd, 0, sizeof(lcd));
if(archlcdmode(&lcd) < 0)
return;
setscreen(&lcd);
screenputs = lcdscreenputs;
if(printbufpos)
screenputs("", 0);
blanktime = 3; /* minutes */
}
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 = (gscreen->data->bdata != (uchar*)vd->fb);
return (uchar*)gscreen->data->bdata;
}
void
detachscreen(void)
{
}
static void
flush8to4(Rectangle r, ulong *s, int sw, ulong *d, int dw)
{
int i, h, w;
/*
print("1) s=%ux sw=%d d=%ux dw=%d r=(%d,%d)(%d,%d)\n",
s, sw, d, dw, r.min.x, r.min.y, r.max.x, r.max.y);
*/
r.min.x &= ~7;
r.max.x = (r.max.x + 7) & ~7;
s += (r.min.y*sw)+(r.min.x>>2);
d += (r.min.y*dw)+(r.min.x>>3);
h = Dy(r);
w = Dx(r) >> 3;
sw -= w*2;
dw -= w;
while(h--) {
for(i=w; i; i--) {
ulong v1 = *s++;
ulong v2 = *s++;
*d++ = (lum[v2>>24]<<28)
|(lum[(v2>>16)&0xff]<<24)
|(lum[(v2>>8)&0xff]<<20)
|(lum[v2&0xff]<<16)
|(lum[v1>>24]<<12)
|(lum[(v1>>16)&0xff]<<8)
|(lum[(v1>>8)&0xff]<<4)
|(lum[v1&0xff])
;
}
s += sw;
d += dw;
}
}
static void
flush8to16(Rectangle r, ulong *s, int sw, ulong *d, int dw)
{
int i, h, w;
ushort *p;
if(0)
iprint("1) s=%p sw=%d d=%p dw=%d r=[%d,%d, %d,%d]\n",
s, sw, d, dw, r.min.x, r.min.y, r.max.x, r.max.y);
r.min.x &= ~3;
r.max.x = (r.max.x + 3) & ~3; /* nearest ulong */
s += (r.min.y*sw)+(r.min.x>>2);
d += (r.min.y*dw)+(r.min.x>>1);
h = Dy(r);
w = Dx(r) >> 2; /* also ulong */
sw -= w;
dw -= w*2;
if(0)
iprint("h=%d w=%d sw=%d dw=%d\n", h, w, sw, dw);
p = palette16;
while(--h >= 0){
for(i=w; --i>=0;){
ulong v = *s++;
*d++ = (p[(v>>8)&0xFF]<<16) | p[v & 0xFF];
*d++ = (p[v>>24]<<16) | p[(v>>16)&0xFF];
}
s += sw;
d += dw;
}
}
static void
flush8to4r(Rectangle r, ulong *s, int sw, ulong *d, int dw)
{
flush8to4(r, s, sw, d, dw); /* rotation not implemented */
}
static void
flush8to16r(Rectangle r, ulong *s, int sw, ulong *d, int dw)
{
int x, y, w, dws;
ushort *p;
ushort *ds;
if(0)
iprint("1) s=%p sw=%d d=%p dw=%d r=[%d,%d, %d,%d]\n",
s, sw, d, dw, r.min.x, r.min.y, r.max.x, r.max.y);
r.min.y &= ~3;
r.max.y = (r.max.y+3) & ~3;
r.min.x &= ~7;
r.max.x = (r.max.x + 7) & ~7;
s += (r.min.y*sw)+(r.min.x>>2);
// d += (r.min.y*dw)+(r.min.x>>1);
w = Dx(r) >> 2; /* also ulong */
sw -= w;
dws = dw*2;
if(0)
iprint("h=%d w=%d sw=%d dw=%d x,y=%d,%d %d\n", Dy(r), w, sw, dw, r.min.x,r.min.y, dws);
p = palette16;
for(y=r.min.y; y<r.max.y; y++){
for(x=r.min.x; x<r.max.x; x+=4){
ulong v = *s++;
ds = (ushort*)(d + x*dw) + (gscreen->r.max.y-(y+1));
ds[0] = p[v & 0xFF];
ds[dws] = p[(v>>8)&0xFF];
ds[dws*2] = p[(v>>16)&0xFF];
ds[dws*3] = p[(v>>24)&0xFF];
}
s += sw;
}
}
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(flushpixels != nil)
flushpixels(r, (ulong*)gscreen->data->bdata, gscreen->width, (ulong*)vd->fb, vd->bwid >> 2);
lcd_flush();
}
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;
}
}
static void
screenpbuf(char *s, int n)
{
if(printbufpos+n > sizeof(printbuf))
n = sizeof(printbuf)-printbufpos;
if(n > 0) {
memmove(&printbuf[printbufpos], s, n);
printbufpos += n;
}
}
static void
screendoputs(char *s, int n)
{
int i;
Rune r;
char buf[4];
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);
}
}
void
screenflush(void)
{
int j = 0;
int k;
for (k = printbufpos; j < k; k = printbufpos) {
screendoputs(printbuf + j, k - j);
j = k;
}
printbufpos = 0;
}
static void
lcdscreenputs(char *s, int n)
{
static Proc *me;
if(!canlock(vd)) {
/* don't deadlock trying to print in interrupt */
/* don't deadlock trying to print while in print */
if(islo() == 0 || up != nil && up == me){
/* save it for later... */
/* In some cases this allows seeing a panic message
that would be locked out forever */
screenpbuf(s, n);
return;
}
lock(vd);
}
me = up;
if (printbufpos)
screenflush();
screendoputs(s, n);
if (printbufpos)
screenflush();
me = nil;
unlock(vd);
}
/*
* Software cursor code: done by hand, might be better to use memdraw
*/
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;
enum {
CUR_ENA = 0x01, /* cursor is enabled */
CUR_DRW = 0x02, /* cursor is currently drawn */
CUR_SWP = 0x10, /* bit swap */
};
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(vd);
r.min.x -= 16;
r.min.y -= 16;
cursoroffrect = r;
if (swc != nil)
cursorupdate0();
unlock(vd);
}
void
cursorenable(void)
{
Point m;
lock(vd);
if(swc != nil) {
swcurs_enable(swc);
m = mousexy();
swcursorflush(m.x, m.y);
}
unlock(vd);
}
void
cursordisable(void)
{
Point m;
lock(vd);
if(swc != nil) {
swcurs_disable(swc);
m = mousexy();
swcursorflush(m.x, m.y);
}
unlock(vd);
}
void
swcursupdate(int oldx, int oldy, int x, int y)
{
if(!canlock(vd))
return; /* if can't lock, don't wake up stuff */
if(x < gscreen->r.min.x)
x = gscreen->r.min.x;
if(x >= gscreen->r.max.x)
x = gscreen->r.max.x;
if(y < gscreen->r.min.y)
y = gscreen->r.min.y;
if(y >= gscreen->r.max.y)
y = gscreen->r.max.y;
if(swc != nil) {
swcurs_hide(swc);
swc->x = x;
swc->y = y;
cursorupdate0();
swcurs_unhide(swc);
swcursorflush(oldx, oldy);
swcursorflush(x, y);
}
unlock(vd);
}
void
drawcursor(Drawcursor* c)
{
Point p, m;
Cursor curs, *cp;
int j, i, h, bpl;
uchar *bc, *bs, *cclr, *cset;
if(swc == nil)
return;
/* Set the default system cursor */
if(c == nil || c->data == nil){
swcurs_disable(swc);
return;
}
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;
}
}
swcurs_load(swc, cp);
m = mousexy();
swcursorflush(m.x, m.y);
swcurs_enable(swc);
}
SWcursor*
swcurs_create(ulong *fb, int width, int ldepth, Rectangle r, int bitswap)
{
SWcursor *swc;
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);
}