1992/0704/port/devbit.c (diff list | history)

port/devbit.c on 1990/0324
1990/0324		#include "u.h"
1992/0321		#include "../port/lib.h"
1990/0324		#include "mem.h" #include "dat.h" #include "fns.h"
1992/0111		#include "../port/error.h"
1990/0324		#include "devtab.h"
1992/0211		#include <libg.h>
1990/0902		#include <gnot.h>
1991/0708		#include "screen.h"
1990/0324
1992/0208		extern GSubfont *defont;
1990/0329
1990/0327		/*
1991/0706		* Some monochrome screens are reversed from what we like:
1992/0209		* We want 0's bright and 1's dark.
1991/0706		* Indexed by an Fcode, these compensate for the source bitmap being wrong * (exchange S rows) and destination (exchange D columns and invert result) */ int flipS[] = { 0x0, 0x4, 0x8, 0xC, 0x1, 0x5, 0x9, 0xD, 0x2, 0x6, 0xA, 0xE, 0x3, 0x7, 0xB, 0xF }; int flipD[] = { 0xF, 0xD, 0xE, 0xC, 0x7, 0x5, 0x6, 0x4, 0xB, 0x9, 0xA, 0x8, 0x3, 0x1, 0x2, 0x0, }; int flipping; /* are flip tables being used to transform Fcodes? */ /*
1990/0329		* Device (#b/bitblt) is exclusive use on open, so no locks are necessary * for i/o */ /*
1992/0622		* Arena is a word containing N, followed by a pointer to the Arena, * followed by a pointer to the Bitmap, followed by N words. * The bitmap pointer is zero if block is free.
1992/0621		* bit.map is an array of pointers to GBitmaps. The GBitmaps are * freed individually and their corresponding entries in bit.map are zeroed. * The index into bit.map is the Bitmap id as seen in libg. Subfonts and * fonts are handled similarly.
1990/0327		*/
1990/0324
1992/0622		typedef struct Arena Arena; struct Arena { ulong *words; /* storage */ ulong *wfree; /* pointer to next free word */ ulong nwords; /* total in arena */ int nbusy; /* number of busy blocks */ };
1992/06271		typedef struct BSubfont BSubfont; struct BSubfont { GSubfont; int ref; /* number of times this subfont is open */ ulong qid[2]; /* unique id used as a cache tag */ };
1990/05313		struct {
1990/0324		Ref;
1992/0622		QLock;
1992/0621		GBitmap **map; /* indexed array */ int nmap; /* number allocated */ GFont **font; /* indexed array */ int nfont; /* number allocated */
1992/06271		BSubfont**subfont; /* indexed array */
1992/0621		int nsubfont; /* number allocated */
1992/0622		Arena *arena; /* array */ int narena; /* number allocated */
1992/0630		int bid; /* last allocated bitmap id */ int subfid; /* last allocated subfont id */ int cacheid; /* last cached subfont id */ int fid; /* last allocated font id */
1990/0329		int init; /* freshly opened; init message pending */
1990/0613		int rid; /* read bitmap id */ int rminy; /* read miny */ int rmaxy; /* read maxy */
1991/0706		int mid; /* colormap read bitmap id */
1990/0324		}bit;
1992/0622		#define DMAP 16 /* delta increase in size of arrays */
1990/0327		#define FREE 0x80000000
1992/0622
1990/0327		void bitcompact(void);
1992/0621		int bitalloc(Rectangle, int);
1990/0902		void bitfree(GBitmap*);
1992/0621		void fontfree(GFont*);
1992/0702		void subfontfree(BSubfont*, int);
1992/0622		void arenafree(Arena*);
1992/0209		void bitstring(GBitmap*, Point, GFont*, uchar*, long, Fcode); void bitloadchar(GFont*, int, GSubfont*, int);
1990/0912		extern GBitmap gscreen;
1990/0327
1991/0707		Mouseinfo mouse; Cursorinfo cursor;
1990/0504
1990/05313		Cursor arrow = {
1990/0730		{-1, -1},
1990/05313		{0xFF, 0xE0, 0xFF, 0xE0, 0xFF, 0xC0, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x80, 0xFF, 0xC0, 0xFF, 0xE0, 0xE7, 0xF0, 0xE3, 0xF8, 0xC1, 0xFC, 0x00, 0xFE, 0x00, 0x7F, 0x00, 0x3E, 0x00, 0x1C, 0x00, 0x08, }, {0x00, 0x00, 0x7F, 0xC0, 0x7F, 0x00, 0x7C, 0x00, 0x7E, 0x00, 0x7F, 0x00, 0x6F, 0x80, 0x67, 0xC0, 0x43, 0xE0, 0x41, 0xF0, 0x00, 0xF8, 0x00, 0x7C, 0x00, 0x3E, 0x00, 0x1C, 0x00, 0x08, 0x00, 0x00, } };
1990/0504		ulong setbits[16];
1990/0902		GBitmap set =
1990/0504		{ setbits, 0, 1, 0,
1992/0604		{0, 0, 16, 16},
1990/0504		{0, 0, 16, 16} }; ulong clrbits[16];
1990/0902		GBitmap clr =
1990/0504		{ clrbits, 0, 1, 0,
1992/0604		{0, 0, 16, 16},
1990/0504		{0, 0, 16, 16} };
1991/0706		ulong cursorbackbits[16*4];
1990/0902		GBitmap cursorback =
1990/0504		{ cursorbackbits, 0, 1, 0,
1992/0604		{0, 0, 16, 16},
1990/0504		{0, 0, 16, 16} };
1990/05313		void Cursortocursor(Cursor*);
1990/0504		void cursoron(int); void cursoroff(int);
1990/0505		int mousechanged(void*);
1990/0504
1990/0324		enum{ Qdir, Qbitblt,
1990/0329		Qmouse,
1990/0709		Qscreen,
1990/0324		}; Dirtab bitdir[]={
1991/1112		"bitblt", {Qbitblt}, 0, 0666, "mouse", {Qmouse}, 0, 0666, "screen", {Qscreen}, 0, 0444,
1990/0324		}; #define NBIT (sizeof bitdir/sizeof(Dirtab))
1992/06271		#define NINFO 8192 /* max chars per subfont; sanity check only */
1992/0622		#define HDR 3
1990/0324		void
1992/0704		bitdebug(void) { int i; long l; Arena *a; l = 0; for(i=0; i<bit.narena; i++){ a = &bit.arena[i]; if(a->words){ l += a->nwords; print("%d: %ld used; %ld total\n", i, (a->wfree-a->words)*sizeof(ulong), a->nwords*sizeof(ulong)); } } print("arena: %ld words\n", l*sizeof(ulong)); l = 0; for(i=0; i<bit.nmap; i++) if(bit.map[i]) l++; print("%d bitmaps ", l); l = 0; for(i=0; i<bit.nfont; i++) if(bit.font[i]) l++; print("%d fonts ", l); l = 0; for(i=0; i<bit.nsubfont; i++) if(bit.subfont[i]){ print("%d: %lux %lux ", i, bit.subfont[i]->qid[0], bit.subfont[i]->qid[1]); l++; } print("%d subfonts\n", l); } void
1990/0324		bitreset(void) {
1990/0327		int i;
1990/0902		GBitmap *bp;
1991/0706		ulong r;
1992/0622		Arena *a;
1990/0327
1992/0621		bit.map = smalloc(DMAP*sizeof(GBitmap*)); bit.nmap = DMAP;
1991/0706		getcolor(0, &r, &r, &r); if(r == 0) flipping = 1;
1992/0630		bit.bid = -1; bit.subfid = -1; bit.fid = -1; bit.cacheid = -1;
1992/0621		bit.font = smalloc(DMAP*sizeof(GFont*)); bit.nfont = DMAP;
1992/06271		bit.subfont = smalloc(DMAP*sizeof(BSubfont*));
1992/0621		bit.nsubfont = DMAP;
1992/0622		bit.arena = smalloc(DMAP*sizeof(Arena)); bit.narena = DMAP; a = &bit.arena[0]; /* * Somewhat of a heuristic: start with three screensful and * allocate single screensful dynamically if needed. */ a->nwords = 3*(gscreen.width*gscreen.r.max.y+HDR); a->words = xalloc(a->nwords*sizeof(ulong)); if(a->words == 0) panic("bitreset"); a->wfree = a->words; a->nbusy = 1; /* keep 0th arena from being freed */
1990/05313		Cursortocursor(&arrow);
1990/0324		} void bitinit(void) {
1991/0706		if(gscreen.ldepth > 3) cursorback.ldepth = 0;
1992/0621		else{
1991/0706		cursorback.ldepth = gscreen.ldepth; cursorback.width = ((16 << gscreen.ldepth) + 31) >> 5; }
1990/0504		cursoron(1);
1990/0324		} Chan* bitattach(char *spec) { return devattach('b', spec); } Chan* bitclone(Chan *c, Chan *nc) { nc = devclone(c, nc);
1990/11211		if(c->qid.path != CHDIR)
1990/0324		incref(&bit);
1991/0706		return nc;
1990/0324		} int bitwalk(Chan *c, char *name) { return devwalk(c, name, bitdir, NBIT, devgen); } void bitstat(Chan *c, char *db) { devstat(c, db, bitdir, NBIT, devgen); }
1992/0621		Chan*
1990/0324		bitopen(Chan *c, int omode) {
1992/0621		GBitmap *b;
1990/11211		if(c->qid.path == CHDIR){
1990/0324		if(omode != OREAD)
1990/11211		error(Eperm); }else if(c->qid.path == Qbitblt){
1990/0324		lock(&bit);
1990/0515		if(bit.ref){
1990/0324		unlock(&bit);
1990/11211		error(Einuse);
1990/0324		}
1992/0621		b = smalloc(sizeof(GBitmap)); *b = gscreen; bit.map[0] = b; /* bitmap 0 is screen */
1992/06271		bit.subfont[0] = (BSubfont*)defont; /* subfont 0 is default */ bit.subfont[0]->ref = 1; bit.subfont[0]->qid[0] = 0; bit.subfont[0]->qid[1] = 0;
1992/0630		bit.bid = -1; bit.fid = -1; bit.subfid = -1; bit.cacheid = -1;
1990/0613		bit.rid = -1;
1991/0706		bit.mid = -1;
1990/0604		bit.init = 0;
1990/05151		bit.ref = 1;
1990/05313		Cursortocursor(&arrow);
1990/0324		unlock(&bit);
1990/05151		}else
1990/0324		incref(&bit); c->mode = openmode(omode); c->flag |= COPEN; c->offset = 0; return c; } void bitcreate(Chan *c, char *name, int omode, ulong perm) {
1991/1115		USED(c, name, omode, perm);
1990/11211		error(Eperm);
1990/0324		} void bitremove(Chan *c) {
1991/1115		USED(c);
1990/11211		error(Eperm);
1990/0324		} void bitwstat(Chan *c, char *db) {
1991/1115		USED(c, db);
1990/11211		error(Eperm);
1990/0324		} void bitclose(Chan *c) {
1992/0621		GBitmap *b, **bp, **ebp;
1992/06271		BSubfont *s, **sp, **esp;
1992/0621		GFont *f, **fp, **efp;
1990/0327
1990/11211		if(c->qid.path!=CHDIR && (c->flag&COPEN)){
1990/0329		lock(&bit);
1990/0327		if(--bit.ref == 0){
1992/0621		ebp = &bit.map[bit.nmap];
1992/0630		for(bp = bit.map; bp<ebp; bp++){
1992/0621		b = *bp; if(b){ bitfree(b); *bp = 0; }
1992/0209		}
1992/0621		esp = &bit.subfont[bit.nsubfont];
1992/0630		for(sp=bit.subfont; sp<esp; sp++){
1992/0621		s = *sp;
1992/0628		if(s)
1992/0702		subfontfree(s, sp-bit.subfont);
1992/0630		/* don't clear *sp: cached */
1992/0621		} efp = &bit.font[bit.nfont]; for(fp=bit.font; fp<efp; fp++){ f = *fp; if(f){ fontfree(f); *fp = 0; } }
1990/0327		}
1990/0324		unlock(&bit); } } long
1991/0411		bitread(Chan *c, void *va, long n, ulong offset)
1990/0324		{
1990/0613		uchar *p, *q; long miny, maxy, t, x, y;
1992/0630		ulong l, v, nw, ws, rv, gv, bv;
1992/0627		int off, j;
1990/06231		Fontchar *i;
1990/0902		GBitmap *src;
1992/0628		BSubfont *s;
1990/0327
1990/11211		if(c->qid.path & CHDIR)
1990/0324		return devdirread(c, va, n, bitdir, NBIT, devgen);
1992/0622		if(c->qid.path == Qmouse){
1990/0329		/*
1990/0505		* mouse: * 'm' 1 * buttons 1 * point 8
1992/06271		* msec 4
1990/0329		*/
1992/06271		if(n < 14)
1990/11211		error(Ebadblt);
1990/0505		Again: while(mouse.changed == 0) sleep(&mouse.r, mousechanged, 0); lock(&cursor); if(mouse.changed == 0){ unlock(&cursor); goto Again; } p = va; p[0] = 'm'; p[1] = mouse.buttons;
1992/0630		BPLONG(p+2, mouse.xy.x); BPLONG(p+6, mouse.xy.y); BPLONG(p+10, TK2MS(MACHP(0)->ticks));
1990/0505		mouse.changed = 0; unlock(&cursor);
1992/06271		return 14;
1992/0622		} if(c->qid.path == Qscreen){
1991/0411		if(offset==0){
1990/0709		if(n < 5*12)
1990/11211		error(Eio);
1990/0709		sprint(va, "%11d %11d %11d %11d %11d ",
1990/0912		gscreen.ldepth, gscreen.r.min.x, gscreen.r.min.y, gscreen.r.max.x, gscreen.r.max.y);
1992/0622		return 5*12;
1990/0709		}
1990/0912		ws = 1<<(3-gscreen.ldepth); /* pixels per byte */ l = (gscreen.r.max.x+ws-1)/ws - gscreen.r.min.x/ws;
1991/0411		t = offset-5*12;
1991/1023		miny = t/l; /* unsigned computation */
1990/0709		maxy = (t+n)/l;
1990/0912		if(miny >= gscreen.r.max.y)
1990/0709		return 0;
1990/0912		if(maxy >= gscreen.r.max.y) maxy = gscreen.r.max.y;
1990/0709		n = 0; p = va; for(y=miny; y<maxy; y++){
1990/0912		q = (uchar*)gaddr(&gscreen, Pt(0, y));
1992/0630		for(x=0; x<l; x++,p++,q++){ v = *q; if(flipping) v = ~v; BPLONG(p, v); }
1990/0709		n += l; }
1992/0622		return n; } if(c->qid.path != Qbitblt)
1990/11211		error(Egreg);
1992/0622		qlock(&bit); if(waserror()){ qunlock(&bit); nexterror();
1990/0327		}
1992/0622		p = va; /* * Fuss about and figure out what to say. */ if(bit.init){ /* * init: * 'I' 1 * ldepth 1 * rectangle 16
1992/0627		* clip rectangle 16
1992/0622		* font info 3*12 * fontchars 6*(defont->n+1) */
1992/0627		if(n < 34)
1992/0622		error(Ebadblt); p[0] = 'I'; p[1] = gscreen.ldepth;
1992/0630		BPLONG(p+2, gscreen.r.min.x); BPLONG(p+6, gscreen.r.min.y); BPLONG(p+10, gscreen.r.max.x); BPLONG(p+14, gscreen.r.max.y); BPLONG(p+18, gscreen.clipr.min.x); BPLONG(p+22, gscreen.clipr.min.y); BPLONG(p+26, gscreen.clipr.max.x); BPLONG(p+30, gscreen.clipr.max.y);
1992/0627		if(n >= 34+3*12+6*(defont->n+1)){ p += 34;
1992/0622		sprint((char*)p, "%11d %11d %11d ", defont->n, defont->height, defont->ascent); p += 3*12; for(i=defont->info,j=0; j<=defont->n; j++,i++,p+=6){
1992/0630		BPSHORT(p, i->x);
1992/0622		p[2] = i->top; p[3] = i->bottom; p[4] = i->left; p[5] = i->width; }
1992/0627		n = 34+3*12+6*(defont->n+1);
1992/0622		}else
1992/0627		n = 34;
1992/0622		bit.init = 0;
1992/0630		}else if(bit.bid > 0){
1992/0622		/* * allocate: * 'A' 1 * bitmap id 2 */ if(n < 3) error(Ebadblt);
1992/0630		if(bit.bid<0 || bit.map[bit.bid]==0) error(Ebadbitmap);
1992/0622		p[0] = 'A';
1992/0630		BPSHORT(p+1, bit.bid); bit.bid = -1;
1992/0622		n = 3;
1992/0630		}else if(bit.subfid > 0){
1992/0622		/* * allocate subfont: * 'K' 1 * subfont id 2 */
1992/0630		if(n<3 || bit.subfid<0)
1992/0622		error(Ebadblt);
1992/0630		s = bit.subfont[bit.subfid]; if(s==0 || s->ref==0) error(Ebadfont);
1992/0622		p[0] = 'K';
1992/0630		BPSHORT(p+1, bit.subfid); bit.subfid = -1;
1992/0622		n = 3;
1992/0630		}else if(bit.cacheid >= 0){
1992/0628		/* * allocate subfont: * 'J' 1 * subfont id 2 * font info 3*12 * fontchars 6*(subfont->n+1) */ p[0] = 'J';
1992/0702		if(bit.cacheid < 0)
1992/0630		error(Ebadfont); s = bit.subfont[bit.cacheid]; if(s==0 || s->ref==0) error(Ebadfont); if(n < 3+3*12+6*(s->n+1))
1992/0628		error(Ebadblt);
1992/0630		BPSHORT(p+1, bit.cacheid);
1992/0628		p += 3;
1992/0630		sprint((char*)p, "%11d %11d %11d ", s->n, s->height, s->ascent);
1992/0628		p += 3*12; for(i=s->info,j=0; j<=s->n; j++,i++,p+=6){
1992/0630		BPSHORT(p, i->x);
1992/0628		p[2] = i->top; p[3] = i->bottom; p[4] = i->left; p[5] = i->width; } n = 3+3*12+6*(s->n+1);
1992/0630		bit.cacheid = -1; }else if(bit.fid >= 0){
1992/0622		/* * allocate font: * 'N' 1 * font id 2 */ if(n < 3) error(Ebadblt);
1992/0630		if(bit.fid<0 || bit.font[bit.fid]==0) error(Ebadfont);
1992/0622		p[0] = 'N';
1992/0630		BPSHORT(p+1, bit.fid); bit.fid = -1;
1992/0622		n = 3; }else if(bit.mid >= 0){ /* * read colormap: * data 12*(2**bitmapdepth) */ src = bit.map[bit.mid]; if(src == 0) error(Ebadbitmap); l = (1<<src->ldepth); nw = 1 << l; if(n < 12*nw) error(Ebadblt); for(j = 0; j < nw; j++){ if(bit.mid == 0){ getcolor(flipping? ~j : j, &rv, &gv, &bv); }else{ rv = j; for(off = 32-l; off > 0; off -= l) rv = (rv << l) | j; gv = bv = rv; }
1992/0630		BPLONG(p, rv); BPLONG(p+4, gv); BPLONG(p+8, bv);
1992/0622		p += 12; } bit.mid = -1; n = 12*nw; }else if(bit.rid >= 0){ /* * read bitmap: * data bytewidth*(maxy-miny) */ src = bit.map[bit.rid]; if(src == 0) error(Ebadbitmap); off = 0; if(bit.rid == 0) off = 1; miny = bit.rminy; maxy = bit.rmaxy; if(miny>maxy || miny<src->r.min.y || maxy>src->r.max.y) error(Ebadblt); ws = 1<<(3-src->ldepth); /* pixels per byte */ /* set l to number of bytes of incoming data per scan line */ if(src->r.min.x >= 0) l = (src->r.max.x+ws-1)/ws - src->r.min.x/ws; else{ /* make positive before divide */ t = (-src->r.min.x)+ws-1; t = (t/ws)*ws; l = (t+src->r.max.x+ws-1)/ws; } if(n < l*(maxy-miny)) error(Ebadblt); if(off) cursoroff(1); n = 0; p = va; for(y=miny; y<maxy; y++){ q = (uchar*)gaddr(src, Pt(src->r.min.x, y)); q += (src->r.min.x&((sizeof(ulong))*ws-1))/ws;
1992/0630		if(bit.rid == 0) for(x=0; x<l; x++,p++,q++) BPLONG(p, ~*q);
1992/0622		else for(x=0; x<l; x++) *p++ = *q++; n += l; } if(off) cursoron(1); bit.rid = -1; }
1990/0327
1992/0622		poperror(); qunlock(&bit);
1990/0327		return n;
1990/0324		} long
1991/0411		bitwrite(Chan *c, void *va, long n, ulong offset)
1990/0324		{
1990/0329		uchar *p, *q;
1991/0706		long m, v, miny, maxy, minx, maxx, t, x, y;
1992/0628		ulong l, nw, ws, rv, q0, q1;
1992/0621		int off, isoff, i, j, ok;
1990/06111		Point pt, pt1, pt2;
1990/0324		Rectangle rect;
1990/05313		Cursor curs;
1991/0706		Fcode fc;
1990/0623		Fontchar *fcp;
1992/0621		GBitmap *b, *src, *dst, *bp;
1992/0702		BSubfont *f, *tf, **fp;
1992/0621		GFont *ff, **ffp;
1990/0324
1990/11211		if(c->qid.path == CHDIR) error(Eisdir);
1990/0324
1990/11211		if(c->qid.path != Qbitblt) error(Egreg);
1990/0327
1990/0721		isoff = 0;
1992/0622		qlock(&bit);
1990/0721		if(waserror()){
1992/0622		qunlock(&bit);
1990/0721		if(isoff) cursoron(1); nexterror(); }
1990/0324		p = va; m = n;
1992/0621		SET(src, dst, f, ff);
1990/0327		while(m > 0) switch(*p){
1990/0329		default: pprint("bitblt request 0x%x\n", *p);
1990/11211		error(Ebadblt);
1990/0329
1990/0327		case 'a': /* * allocate: * 'a' 1 * ldepth 1 * Rectangle 16 * next read returns allocated bitmap id */ if(m < 18)
1990/11211		error(Ebadblt);
1990/0327		v = *(p+1);
1992/0209		if(v > 3) /* BUG */
1990/11211		error(Ebadblt);
1992/0630		rect.min.x = BGLONG(p+2); rect.min.y = BGLONG(p+6); rect.max.x = BGLONG(p+10); rect.max.y = BGLONG(p+14);
1991/0423		if(Dx(rect) < 0 || Dy(rect) < 0) error(Ebadblt);
1992/0630		bit.bid = bitalloc(rect, v);
1990/0327		m -= 18; p += 18; break;
1990/0324
1990/0327		case 'b': /* * bitblt * 'b' 1 * dst id 2 * dst Point 8 * src id 2 * src Rectangle 16 * code 2 */ if(m < 31)
1990/11211		error(Ebadblt);
1992/0630		fc = BGSHORT(p+29) & 0xF; v = BGSHORT(p+11);
1992/0621		if(v<0 || v>=bit.nmap || (src=bit.map[v])==0)
1991/0706		error(Ebadbitmap); off = 0; if(v == 0){ if(flipping) fc = flipS[fc]; off = 1; }
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1990/11211		error(Ebadbitmap);
1991/0706		if(v == 0){ if(flipping) fc = flipD[fc];
1990/0504		off = 1;
1991/0706		}
1992/0630		pt.x = BGLONG(p+3); pt.y = BGLONG(p+7); rect.min.x = BGLONG(p+13); rect.min.y = BGLONG(p+17); rect.max.x = BGLONG(p+21); rect.max.y = BGLONG(p+25);
1990/0721		if(off && !isoff){
1990/0504		cursoroff(1);
1990/0721		isoff = 1; }
1991/1225		gbitblt(dst, pt, src, rect, fc);
1990/0327		m -= 31; p += 31; break;
1990/05313		case 'c': /* * cursorswitch * 'c' 1 * nothing more: return to arrow; else * Point 8 * clr 32 * set 32 */ if(m == 1){
1990/0721		if(!isoff){ cursoroff(1); isoff = 1; }
1990/05313		Cursortocursor(&arrow); m -= 1; p += 1; break; } if(m < 73)
1990/11211		error(Ebadblt);
1992/0630		curs.offset.x = BGLONG(p+1); curs.offset.y = BGLONG(p+5);
1991/0318		memmove(curs.clr, p+9, 2*16); memmove(curs.set, p+41, 2*16);
1990/0721		if(!isoff){ cursoroff(1); isoff = 1; }
1990/05313		Cursortocursor(&curs); m -= 73; p += 73; break;
1990/0327		case 'f': /* * free * 'f' 1 * id 2 */ if(m < 3)
1990/11211		error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1990/11211		error(Ebadbitmap);
1990/0327		bitfree(dst);
1992/0621		bit.map[v] = 0;
1990/0327		m -= 3; p += 3;
1990/0604		break;
1990/0623		case 'g': /*
1992/0628		* free subfont
1990/0623		* 'g' 1 * id 2 */ if(m < 3)
1990/11211		error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0628		if(v<0 || v>=bit.nsubfont || (f=bit.subfont[v])==0 || f->ref==0)
1990/11211		error(Ebadfont);
1992/0702		subfontfree(f, v);
1990/0623		m -= 3; p += 3; break;
1992/0209		case 'h': /* * free font * 'h' 1 * id 2 */ if(m < 3) error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nfont || (ff=bit.font[v])==0)
1992/0209		error(Ebadfont);
1992/0621		fontfree(ff); bit.font[v] = 0;
1992/0209		m -= 3; p += 3; break;
1990/0604		case 'i': /* * init *
1992/0627		* 'i' 1
1990/0604		*/
1992/0627		bit.init = 1;
1990/0604		m -= 1; p += 1;
1990/0327		break;
1990/0329
1992/06271		case 'j': /*
1992/0628		* subfont cache check
1992/06271		* * 'j' 1
1992/0702		* qid 8
1992/06271		*/
1992/0628		if(m < 9) error(Ebadblt);
1992/0630		q0 = BGLONG(p+1); q1 = BGLONG(p+5);
1992/0629		i = 0; if(q0 != ~0) for(; i<bit.nsubfont; i++){ f = bit.subfont[i]; if(f && f->qid[0]==q0 && f->qid[1]==q1) goto sfcachefound; }
1992/0628		error(Esfnotcached); sfcachefound: f->ref++;
1992/0630		bit.cacheid = i;
1992/06271		m -= 9; p += 9; break;
1990/0623		case 'k': /*
1992/0209		* allocate subfont
1990/0623		* 'k' 1 * n 2 * height 1 * ascent 1 * bitmap id 2
1992/06271		* qid 8
1990/0707		* fontchars 6*(n+1)
1990/0623		* next read returns allocated font id */
1992/06271		if(m < 15)
1990/11211		error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/06271		if(v<0 || v>NINFO || m<15+6*(v+1))
1990/11211		error(Ebadblt);
1992/0621		for(i=1; i<bit.nsubfont; i++) if(bit.subfont[i] == 0)
1992/0209		goto subfontfound;
1992/0621		fp = bit.subfont;
1992/06271		bit.subfont = smalloc((bit.nsubfont+DMAP)*sizeof(BSubfont*)); memmove(bit.subfont, fp, bit.nsubfont*sizeof(BSubfont*));
1992/0621		free(fp); bit.nsubfont += DMAP;
1992/0209		subfontfound:
1992/06271		f = smalloc(sizeof(BSubfont));
1992/0621		bit.subfont[i] = f; f->info = smalloc((v+1)*sizeof(Fontchar));
1990/0623		f->n = v; f->height = p[3]; f->ascent = p[4];
1992/0630		f->qid[0] = BGLONG(p+7); f->qid[1] = BGLONG(p+11);
1992/0702		/* check to see if already there, uncache if so */ for(j=0; j<bit.nsubfont; j++){ if(j == i) continue; tf = bit.subfont[j];
1992/0704		if(tf && tf->qid[0]==f->qid[0] && tf->qid[1]==f->qid[1]){
1992/0702		f->qid[0] = ~0; /* uncached */
1992/0704		break; }
1992/0702		}
1992/0628		f->ref = 1;
1992/0630		v = BGSHORT(p+5);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1990/11211		error(Ebadbitmap);
1992/06271		f->bits = dst; bit.map[v] = 0; /* subfont now owns bitmap */ m -= 15; p += 15;
1990/0623		fcp = f->info;
1992/0621		for(j=0; j<=f->n; j++,fcp++){
1992/0630		fcp->x = BGSHORT(p);
1990/0623		fcp->top = p[2]; fcp->bottom = p[3]; fcp->left = p[4]; fcp->width = p[5]; fcp->top = p[2]; p += 6; m -= 6; }
1992/0630		bit.subfid = i;
1990/0623		break;
1990/06111		case 'l': /* * line segment * * 'l' 1 * id 2 * pt1 8 * pt2 8 * value 1 * code 2 */ if(m < 22)
1990/11211		error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1990/11211		error(Ebadbitmap);
1990/06111		off = 0;
1992/0630		fc = BGSHORT(p+20) & 0xF;
1991/0706		if(v == 0){ if(flipping) fc = flipD[fc];
1990/06111		off = 1;
1991/0706		}
1992/0630		pt1.x = BGLONG(p+3); pt1.y = BGLONG(p+7); pt2.x = BGLONG(p+11); pt2.y = BGLONG(p+15);
1990/06111		t = p[19];
1990/0721		if(off && !isoff){
1990/06111		cursoroff(1);
1990/0721		isoff = 1; }
1991/0706		gsegment(dst, pt1, pt2, t, fc);
1990/06111		m -= 22; p += 22;
1990/0613		break;
1991/0706		case 'm': /* * read colormap * * 'm' 1 * id 2 */ if(m < 3) error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1991/0706		error(Ebadbitmap); bit.mid = v; m -= 3; p += 3; break;
1992/0209		case 'n': /* * allocate font * 'n' 1 * height 1 * ascent 1 * ldepth 2
1992/0627		* ncache 2
1992/0209		* next read returns allocated font id */
1992/0627		if(m < 7)
1992/0209		error(Ebadblt);
1992/0630		v = BGSHORT(p+3); t = BGSHORT(p+5);
1992/0627		if(v<0 || t<0)
1992/0209		error(Ebadblt);
1992/0621		for(i=0; i<bit.nfont; i++) if(bit.font[i] == 0)
1992/0209		goto fontfound;
1992/0621		ffp = bit.font; bit.font = smalloc((bit.nfont+DMAP)*sizeof(GFont*)); memmove(bit.font, ffp, bit.nfont*sizeof(GFont*)); free(ffp); bit.nfont += DMAP;
1992/0209		fontfound:
1992/0621		ff = smalloc(sizeof(GFont));
1992/0627		ff->ncache = t; ff->cache = smalloc(t*sizeof(GCacheinfo));
1992/0621		bit.font[i] = ff; ff = bit.font[i];
1992/0209		ff->height = p[1]; ff->ascent = p[2]; ff->ldepth = v; ff->width = 0; ff->b = 0;
1992/0627		m -= 7; p += 7;
1992/0630		bit.fid = i;
1992/0209		break;
1990/0722		case 'p': /* * point * * 'p' 1 * id 2 * pt 8 * value 1 * code 2 */ if(m < 14)
1990/11211		error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1990/11211		error(Ebadbitmap);
1990/0722		off = 0;
1992/0630		fc = BGSHORT(p+12) & 0xF;
1991/0706		if(v == 0){ if(flipping) fc = flipD[fc];
1990/0722		off = 1;
1991/0706		}
1992/0630		pt1.x = BGLONG(p+3); pt1.y = BGLONG(p+7);
1990/0722		t = p[11]; if(off && !isoff){ cursoroff(1); isoff = 1; }
1991/0706		gpoint(dst, pt1, t, fc);
1990/0722		m -= 14; p += 14; break;
1992/0604		case 'q': /* * clip rectangle * 'q' 1 * id 2 * rect 16 */ if(m < 19) error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1992/0604		error(Ebadbitmap);
1992/0630		rect.min.x = BGLONG(p+3); rect.min.y = BGLONG(p+7); rect.max.x = BGLONG(p+11); rect.max.y = BGLONG(p+15);
1992/0604		if(rectclip(&rect, dst->r)) dst->clipr = rect; else dst->clipr = dst->r; m -= 19; p += 19; break;
1990/0613		case 'r': /* * read * 'r' 1 * src id 2 * miny 4 * maxy 4 */ if(m < 11)
1990/11211		error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (src=bit.map[v])==0)
1990/11211		error(Ebadbitmap);
1992/0630		miny = BGLONG(p+3); maxy = BGLONG(p+7);
1990/0613		if(miny>maxy || miny<src->r.min.y || maxy>src->r.max.y)
1990/11211		error(Ebadblt);
1990/0613		bit.rid = v; bit.rminy = miny; bit.rmaxy = maxy; p += 11; m -= 11;
1990/06111		break;
1992/0627		case 's':
1990/0329		/*
1992/0209		* string
1992/0627		* 's' 1
1992/0209		* id 2 * pt 8 * font id 2 * code 2 * n 2
1992/0627		* cache indices 2*n (not null terminated)
1992/0209		*/ if(m < 17) error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1992/0209		error(Ebadbitmap); off = 0;
1992/0630		fc = BGSHORT(p+13) & 0xF;
1992/0209		if(v == 0){ if(flipping) fc = flipD[fc]; off = 1; }
1992/0630		pt.x = BGLONG(p+3); pt.y = BGLONG(p+7); v = BGSHORT(p+11);
1992/0621		if(v<0 || v>=bit.nfont || (ff=bit.font[v])==0)
1992/0209		error(Ebadblt);
1992/0630		l = BGSHORT(p+15)*2;
1992/0209		p += 17; m -= 17; if(l > m) error(Ebadblt); if(off && !isoff){ cursoroff(1); isoff = 1; } bitstring(dst, pt, ff, p, l, fc); m -= l; p += l; break;
1992/0627		case 't': /* * texture * 't' 1 * dst id 2 * rect 16 * src id 2 * fcode 2 */ if(m < 23) error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0627		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0) error(Ebadbitmap); off = 0;
1992/0630		fc = BGSHORT(p+21) & 0xF;
1992/0627		if(v == 0){ if(flipping) fc = flipD[fc]; off = 1; }
1992/0630		rect.min.x = BGLONG(p+3); rect.min.y = BGLONG(p+7); rect.max.x = BGLONG(p+11); rect.max.y = BGLONG(p+15); v = BGSHORT(p+19);
1992/0627		if(v<0 || v>=bit.nmap || (src=bit.map[v])==0) error(Ebadbitmap); if(off && !isoff){ cursoroff(1); isoff = 1; } gtexture(dst, rect, src, fc); m -= 23; p += 23; break;
1992/0209		case 'v': /*
1992/0704		* clear font cache and bitmap. * if error, font is unchanged.
1992/0209		* 'v' 1 * id 2
1992/06271		* ncache 2
1992/0209		* width 2 */
1992/06271		if(m < 7)
1992/0209		error(Ebadblt);
1992/0630		v = BGSHORT(p+1); t = BGSHORT(p+3);
1992/06271		if(t<0 || v<0 || v>=bit.nfont || (ff=bit.font[v])==0)
1992/0209		error(Ebadblt);
1992/0704		x = BGSHORT(p+5); i = bitalloc(Rect(0, 0, t*x, ff->height), ff->ldepth); /* now committed */ if(ff->b) bitfree(ff->b); ff->b = bit.map[i]; bit.map[i] = 0; /* disconnect it from GBitmap space */ ff->width = x;
1992/0209		/* * memset not necessary but helps avoid * confusion if the cache is mishandled by the * user. */
1992/06271		if(t == ff->ncache) memset(ff->cache, 0, t*sizeof(ff->cache[0])); else{ free(ff->cache); ff->cache = smalloc(t*sizeof(ff->cache[0])); ff->ncache = t; } p += 7; m -= 7;
1992/0209		break;
1990/0329		case 'w': /* * write * 'w' 1 * dst id 2 * miny 4 * maxy 4 * data bytewidth*(maxy-miny) */ if(m < 11)
1990/11211		error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0621		if(v<0 || v>=bit.nmap || (dst=bit.map[v])==0)
1990/11211		error(Ebadbitmap);
1990/0504		off = 0; if(v == 0) off = 1;
1992/0630		miny = BGLONG(p+3); maxy = BGLONG(p+7);
1990/03291		if(miny>maxy || miny<dst->r.min.y || maxy>dst->r.max.y)
1990/11211		error(Ebadblt);
1990/0329		ws = 1<<(3-dst->ldepth); /* pixels per byte */ /* set l to number of bytes of incoming data per scan line */ if(dst->r.min.x >= 0) l = (dst->r.max.x+ws-1)/ws - dst->r.min.x/ws; else{ /* make positive before divide */ t = (-dst->r.min.x)+ws-1; t = (t/ws)*ws; l = (t+dst->r.max.x+ws-1)/ws; } p += 11; m -= 11; if(m < l*(maxy-miny))
1990/11211		error(Ebadblt);
1990/0721		if(off && !isoff){
1990/0504		cursoroff(1);
1990/0721		isoff = 1; }
1990/0329		for(y=miny; y<maxy; y++){
1990/0912		q = (uchar*)gaddr(dst, Pt(dst->r.min.x, y));
1990/0911		q += (dst->r.min.x&((sizeof(ulong))*ws-1))/ws;
1991/0706		if(v == 0 && flipping) /* flip bits */ for(x=0; x<l; x++)
1992/0209		*q++ = ~(*p++);
1991/0706		else for(x=0; x<l; x++)
1992/0209		*q++ = *p++;
1990/0329		m -= l; } break;
1990/0826		case 'x': /* * cursorset * * 'x' 1 * pt 8 */ if(m < 9)
1990/11211		error(Ebadblt);
1992/0630		pt1.x = BGLONG(p+1); pt1.y = BGLONG(p+5);
1991/0706		/* if(!eqpt(mouse.xy, pt1))*/{
1991/0619		mouse.xy = pt1; mouse.track = 1; mouseclock(); }
1990/0826		m -= 9; p += 9; break;
1991/0706
1992/0209		case 'y': /* * load font from subfont * 'y' 1 * id 2
1992/0212		* cache index 2
1992/0209		* subfont id 2 * subfont index 2 */ if(m < 9) error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1992/0622		if(v<0 || v>=bit.nfont || (ff=bit.font[v])==0)
1992/0209		error(Ebadblt);
1992/0630		l = BGSHORT(p+3); if(l >= ff->ncache)
1992/0209		error(Ebadblt);
1992/0630		v = BGSHORT(p+5);
1992/0628		if(v<0 || v>=bit.nsubfont || (f=bit.subfont[v])==0 || f->ref==0) error(Ebadfont);
1992/0630		nw = BGSHORT(p+7);
1992/0209		if(nw >= f->n) error(Ebadblt); bitloadchar(ff, l, f, nw); p += 9; m -= 9; break;
1991/0706		case 'z': /* * write the colormap * * 'z' 1 * id 2 * map 12*(2**bitmapdepth) */ if(m < 3) error(Ebadblt);
1992/0630		v = BGSHORT(p+1);
1991/0706		if(v != 0) error(Ebadbitmap); m -= 3; p += 3;
1992/0621		nw = 1 << (1 << gscreen.ldepth);
1991/0706		if(m < 12*nw) error(Ebadblt); ok = 1; for(i = 0; i < nw; i++){
1992/0630		ok &= setcolor(i, BGLONG(p), BGLONG(p+4), BGLONG(p+8));
1991/0706		p += 12; m -= 12; } if(!ok){ /* assume monochrome: possibly change flipping */
1992/0630		l = BGLONG(p-12);
1991/0706		getcolor(nw-1, &rv, &rv, &rv); flipping = (l != rv); } break;
1990/0327		}
1991/0614		poperror();
1990/0721		if(isoff) cursoron(1);
1992/0622		qunlock(&bit);
1990/0324		return n; }
1992/0621		int
1992/0209		bitalloc(Rectangle rect, int ld) {
1992/0622		Arena *a, *ea, *na, *aa;
1992/0621		GBitmap *b, **bp, **ep;
1992/0628		BSubfont *s;
1992/0209		ulong l, ws, nw; long t;
1992/0622		int i, try;
1992/0209		ws = 1<<(5-ld); /* pixels per word */
1992/0621		if(rect.min.x >= 0){
1992/0519		l = (rect.max.x+ws-1)/ws; l -= rect.min.x/ws;
1992/0621		}else{ /* make positive before divide */
1992/0209		t = (-rect.min.x)+ws-1; t = (t/ws)*ws; l = (t+rect.max.x+ws-1)/ws; } nw = l*Dy(rect);
1992/0622		ea = &bit.arena[bit.narena]; /* first try easy fit */ for(a=bit.arena; a<ea; a++){ if(a->words == 0) continue; if(a->wfree+HDR+nw <= a->words+a->nwords) goto found;
1992/0209		}
1992/0622		/* compact and try again */ bitcompact(); aa = 0; for(a=bit.arena; a<ea; a++){ if(a->words == 0){ if(aa == 0) aa = a; continue; } if(a->wfree+HDR+nw <= a->words+a->nwords) goto found; } /* need new arena */
1992/0630		if(aa){
1992/0622		a = aa;
1992/0630		a->nwords = gscreen.width*gscreen.r.max.y+HDR; if(a->nwords < HDR+nw) a->nwords = HDR+nw; a->words = xalloc(a->nwords*sizeof(ulong)); if(a->words){ a->wfree = a->words; a->nbusy = 0; goto found; }
1992/0622		}
1992/0630		/* else can't grow list: bitmaps have backpointers */
1992/0628		/* free unused subfonts, compact, and try again */ for(i=0; i<bit.nsubfont; i++){ s = bit.subfont[i];
1992/0630		if(s && s!=defont && s->ref==0){
1992/0702		s->ref = 1; s->qid[0] = ~0; /* force cleanup */ subfontfree(s, i);
1992/0628		} } bitcompact(); for(a=bit.arena; a<ea; a++){ if(a->words == 0) continue; if(a->wfree+HDR+nw <= a->words+a->nwords) goto found; } if(a == ea)
1992/0622		error(Enobitstore); found:
1992/0621		b = smalloc(sizeof(GBitmap));
1992/0622		*a->wfree++ = nw; *a->wfree++ = (ulong)a; *a->wfree++ = (ulong)b;
1992/0703		memset(a->wfree, 0, (nw-HDR)*sizeof(ulong));
1992/0622		b->base = a->wfree; a->wfree += nw; a->nbusy++;
1992/0621		b->zero = l*rect.min.y;
1992/0209		if(rect.min.x >= 0)
1992/0621		b->zero += rect.min.x/ws;
1992/0209		else
1992/0621		b->zero -= (-rect.min.x+ws-1)/ws; b->zero = -b->zero; b->width = l; b->ldepth = ld; b->r = rect; b->clipr = rect; b->cache = 0; /* worth doing better than linear lookup? */ ep = bit.map+bit.nmap; for(bp=bit.map; bp<ep; bp++) if(*bp == 0) break; if(bp == ep){ bp = bit.map; bit.map = smalloc((bit.nmap+DMAP)*sizeof(GBitmap*)); memmove(bit.map, bp, bit.nmap*sizeof(GBitmap*)); free(bp); bp = bit.map+bit.nmap; bit.nmap += DMAP; } *bp = b; return bp-bit.map;
1992/0209		}
1990/0324		void
1992/0621		bitfree(GBitmap *b)
1990/0327		{
1992/0622		Arena *a;
1992/0630		if(b->base != gscreen.base){ /* can't free screen memory */ a = (Arena*)(b->base[-2]); if(a<bit.arena || a>=bit.arena+bit.narena) panic("bitfree"); a->nbusy--; if(a->nbusy == 0) arenafree(a); b->base[-1] = 0; }
1992/0621		free(b);
1990/0327		}
1992/0209		void
1992/0621		fontfree(GFont *f) { if(f->b) bitfree(f->b);
1992/0627		free(f->cache);
1992/0621		free(f); } void
1992/0702		subfontfree(BSubfont *s, int i)
1992/0621		{
1992/0702		if(s!=defont && s->ref>0){ /* don't free subfont 0, defont */
1992/0630		s->ref--;
1992/0702		if(s->ref==0 && s->qid[0]==~0){ /* uncached */ bitfree(s->bits); free(s->info); free(s); bit.subfont[i] = 0; } }
1992/0628		return;
1992/0621		} void
1992/0622		arenafree(Arena *a) { xfree(a->words); a->words = 0; } void
1992/0209		bitstring(GBitmap *bp, Point pt, GFont *f, uchar *p, long l, Fcode fc) { int full; Rectangle rect; ushort r; GCacheinfo *c; full = (fc==S || fc==notS); /* for reverse-video */ if(full){ rect.min.y = 0; rect.max.y = f->height; } while(l > 0){
1992/0630		r = BGSHORT(p);
1992/0209		p += 2; l -= 2;
1992/0630		if(r >= f->ncache)
1992/0211		continue;
1992/0209		c = &f->cache[r]; if(!full){ rect.min.y = c->top; rect.max.y = c->bottom; } rect.min.x = c->x; rect.max.x = c->xright; gbitblt(bp, Pt(pt.x+c->left, pt.y+rect.min.y), f->b, rect, fc); pt.x += c->width; } } void bitloadchar(GFont *f, int ci, GSubfont *subf, int si) { GCacheinfo *c; Rectangle rect; Fontchar *fi;
1992/0219		int y;
1992/0209		c = &f->cache[ci]; fi = &subf->info[si];
1992/0219		/* careful about sign extension: top and bottom are uchars */ y = fi->top + (f->ascent-subf->ascent); if(y < 0) y = 0; c->top = y; y = fi->bottom + (f->ascent-subf->ascent); if(y < 0) y = 0; c->bottom = y;
1992/0209		c->width = fi->width; c->left = fi->left; c->x = ci*f->width; c->xright = c->x + ((fi+1)->x - fi->x); rect.min.y = 0; rect.max.y = f->height; rect.min.x = c->x;
1992/0214		rect.max.x = c->x+f->width; gbitblt(f->b, rect.min, f->b, rect, 0);
1992/0209		rect.min.x = fi->x; rect.max.x = (fi+1)->x;
1992/0219		rect.max.y = subf->height;
1992/0209		gbitblt(f->b, Pt(c->x, f->ascent-subf->ascent), subf->bits, rect, S); }
1990/0327		void bitcompact(void) {
1992/0622		Arena *a, *b, *ea, *na; ulong *p1, *p2, n;
1990/0327
1992/0622		ea = &bit.arena[bit.narena]; for(a=bit.arena; a<ea; a++){ if(a->words == 0)
1990/0327		continue;
1992/0622		/* first compact what's here */ p1 = p2 = a->words; while(p2 < a->wfree){ n = HDR+p2[0]; if(p2[2] == 0){ p2 += n; continue; } if(p1 != p2){ memmove(p1, p2, n*sizeof(ulong)); ((GBitmap*)p1[2])->base = p1+HDR; } p2 += n; p1 += n;
1990/0327		}
1992/0622		/* now pull stuff from later arena to fill this one */ na = a+1; while(na<ea && p1<a->words+a->nwords){ p2 = na->words; if(p2 == 0){ na++; continue; } while(p2 < na->wfree){ n = HDR+p2[0]; if(p2[2] == 0){ p2 += n; continue; } if(p1+n < a->words+a->nwords){ memmove(p1, p2, n*sizeof(ulong)); ((GBitmap*)p1[2])->base = p1+HDR; /* block now in new arena... */ p1[1] = (ulong)a; a->nbusy++; /* ... not in old arena */ na->nbusy--; p2[2] = 0; p1 += n; } p2 += n; } na++;
1990/0327		}
1992/0622		a->wfree = p1;
1990/0327		}
1992/0630		for(a=bit.arena; a<ea; a++) if(a->words && a->nbusy==0)
1992/0622		arenafree(a);
1990/0329		} void
1990/05313		Cursortocursor(Cursor *c)
1990/0329		{
1990/0504		int i;
1991/0731		uchar *p;
1990/0504		lock(&cursor);
1991/0318		memmove(&cursor, c, sizeof(Cursor));
1990/0504		for(i=0; i<16; i++){
1991/0731		p = (uchar*)&setbits[i]; *p = c->set[2*i]; *(p+1) = c->set[2*i+1]; p = (uchar*)&clrbits[i]; *p = c->clr[2*i]; *(p+1) = c->clr[2*i+1];
1990/0504		} unlock(&cursor); } void cursoron(int dolock) { if(dolock) lock(&cursor); if(cursor.visible++ == 0){ cursor.r.min = mouse.xy; cursor.r.max = add(mouse.xy, Pt(16, 16)); cursor.r = raddp(cursor.r, cursor.offset);
1991/1225		gbitblt(&cursorback, Pt(0, 0), &gscreen, cursor.r, S); gbitblt(&gscreen, add(mouse.xy, cursor.offset),
1991/0706		&clr, Rect(0, 0, 16, 16), flipping? flipD[D&~S] : D&~S);
1991/1225		gbitblt(&gscreen, add(mouse.xy, cursor.offset),
1991/0706		&set, Rect(0, 0, 16, 16), flipping? flipD[S|D] : S|D);
1990/0504		} if(dolock) unlock(&cursor); } void cursoroff(int dolock) { if(dolock) lock(&cursor); if(--cursor.visible == 0)
1991/1225		gbitblt(&gscreen, cursor.r.min, &cursorback, Rect(0, 0, 16, 16), S);
1990/0504		if(dolock) unlock(&cursor); } void
1991/0706		mousedelta(int b, int dx, int dy) /* called at higher priority */
1990/0504		{
1991/0706		mouse.dx += dx; mouse.dy += dy; mouse.newbuttons = b; mouse.track = 1; } void mousebuttons(int b) /* called at higher priority */ {
1990/0505		/* * It is possible if you click very fast and get bad luck * you could miss a button click (down up). Doesn't seem * likely or important enough to worry about. */ mouse.newbuttons = b; mouse.track = 1; /* aggressive but o.k. */ mouseclock();
1990/0504		} void
1991/0707		mouseupdate(int dolock)
1990/0504		{
1991/0706		int x, y;
1991/0707		if(!mouse.track || (dolock && !canlock(&cursor))) return; x = mouse.xy.x + mouse.dx; if(x < gscreen.r.min.x) x = gscreen.r.min.x; if(x >= gscreen.r.max.x) x = gscreen.r.max.x; y = mouse.xy.y + mouse.dy; if(y < gscreen.r.min.y) y = gscreen.r.min.y; if(y >= gscreen.r.max.y) y = gscreen.r.max.y; cursoroff(0); mouse.xy = Pt(x, y); cursoron(0); mouse.dx = 0; mouse.dy = 0; mouse.clock = 0; mouse.track = 0; mouse.buttons = mouse.newbuttons; mouse.changed = 1; if(dolock){
1991/0423		unlock(&cursor); wakeup(&mouse.r); } }
1991/0605		int mouseputc(IOQ *q, int c) {
1991/0706		static short msg[5]; static int nb; static uchar b[] = {0, 4, 2, 6, 1, 5, 3, 7};
1991/0605
1991/1115		USED(q);
1991/0706		if((c&0xF0) == 0x80) nb=0; msg[nb] = c; if(c & 0x80)
1992/0630		msg[nb] |= ~0xFF; /* sign extend */
1991/0706		if(++nb == 5){ mouse.newbuttons = b[(msg[0]&7)^7]; mouse.dx = msg[1]+msg[3]; mouse.dy = -(msg[2]+msg[4]); mouse.track = 1; mouseclock(); nb = 0;
1990/0329		}
1992/0522		return 0;
1990/0505		} int mousechanged(void *m) {
1991/1115		USED(m);
1990/0505		return mouse.changed;
1990/0324		}