#include <lib9.h>#include <draw.h>#include <cursor.h>#include "dat.h"#include "fns.h" static void addmouse(Mousebuf*, Mouse, int);static void matchmouse(Mousebuf*, Reqbuf*);static void replymouse(Mousebuf*, void*); voidreadmouse(Window *w, void* r){        Mousebuf *mouse;        Reqbuf *mousereqs;         mouse = &w->mouse;        mousereqs = &w->mousereqs;         addreq(mousereqs, r);        // fprint(2, "mouse unstall\n");        mouse->stall = 0;        matchmouse(mouse, mousereqs);} voidwritemouse(Window *w, Mouse m, int resized){	Mousebuf *mouse;	Reqbuf *mousereqs; 	mouse = &w->mouse;	mousereqs = &w->mousereqs; 	addmouse(mouse, m, resized);	matchmouse(mouse, mousereqs);} staticvoidaddmouse(Mousebuf *mouse, Mouse m, int resized){	int p;         if(!mouse->open || mouse->stall)                return; 	mouse->m[mouse->wi] = m;	if(resized){		p = mouse->wi - 1;		if(p < 0)			p = nelem(mouse->m) - 1;		mouse->m[mouse->wi] = mouse->m[p];		mouse->resized = 1;	}	mouse->wi++;	if(mouse->wi == nelem(mouse->m))		mouse->wi = 0;	if(mouse->wi == mouse->ri){		mouse->stall = 1;		mouse->ri = 0;		mouse->wi = 1;		mouse->m[0] = m;		/* fprint(2, "mouse stall\n"); */	}} staticvoidreplymouse(Mousebuf *mouse, void *r){        int n;        char buf[50], c;        Mouse m;         m = mouse->m[mouse->ri];        c = 'm';        if(mouse->resized)                c = 'r';        n = sprint(buf, "%c%11d %11d %11d %11ld ", c, m.xy.x, m.xy.y, m.buttons, m.msec);        buf[n] = '\0';        readreply(r, buf);        mouse->resized = 0;} staticvoidmatchmouse(Mousebuf *mouse, Reqbuf *mousereqs){        while(mouse->ri != mouse->wi && mousereqs->ri != mousereqs->wi){                replymouse(mouse, nextreq(mousereqs));                mouse->ri++;                if(mouse->ri == nelem(mouse->m))                        mouse->ri = 0;        }} static intrevbyte(int b){	int r; 	r = 0;	r |= (b&0x01) << 7;	r |= (b&0x02) << 5;	r |= (b&0x04) << 3;	r |= (b&0x08) << 1;	r |= (b&0x10) >> 1;	r |= (b&0x20) >> 3;	r |= (b&0x40) >> 5;	r |= (b&0x80) >> 7;	return r;} staticvoiddrawwincursor(Window *win, Drawcursor* c){	uchar *bs, *bc, *ps, *pm;	int i, j, w, h, bpl; 	if(c->data == nil){		if(win->cursor.h != 0)			win->cursor.h = 0;		xsetcursor(win);		return;	} 	h = (c->maxy-c->miny)/2;	/* image, then mask */	if(h > CursorSize)		h = CursorSize;	bpl = bytesperline(Rect(c->minx, c->miny, c->maxx, c->maxy), 1);	w = bpl;	if(w > CursorSize/8)		w = CursorSize/8; 	ps = win->cursor.src;	pm = win->cursor.mask;	bc = c->data;	bs = c->data + h*bpl;	for(i = 0; i < h; i++){		for(j = 0; j < bpl && j < w; j++) {			*ps++ = revbyte(bs[j]);			*pm++ = revbyte(bs[j] | bc[j]);		}		bs += bpl;		bc += bpl;	}	win->cursor.h = h;	win->cursor.w = w*8;	win->cursor.hotx = c->hotx;	win->cursor.hoty = c->hoty;	xsetcursor(win);} staticintinfernocursorwrite(Window *w, char *buf, int n){	uchar *p;	Drawcursor c; 	p = buf;	/* TO DO: perhaps interpret data as an Image */	/*	 *  hotx[4] hoty[4] dx[4] dy[4] clr[dx/8 * dy/2] set[dx/8 * dy/2]	 *  dx must be a multiple of 8; dy must be a multiple of 2.	 */	if(n < 8)		return -1;	c.hotx = BGLONG(p+0*4);	c.hoty = BGLONG(p+1*4);	c.minx = 0;	c.miny = 0;	c.maxx = BGLONG(p+2*4);	c.maxy = BGLONG(p+3*4);	if(c.maxx%8 != 0 || c.maxy%2 != 0 || n-4*4 != (c.maxx/8 * c.maxy))		return -1;	c.data = p + 4*4;	drawwincursor(w, &c);	return 0;} staticintplan9cursorwrite(Window *w, char *buf, int n){	uchar *p;	Drawcursor c; 	p = buf;	/*	 *  offsetx[4] offsety[4] clr[2*16] set[2*16]	 */	if(n < 2*4+2*2*16)		return -1;	c.hotx = BGLONG(p+0*4);	c.hoty = BGLONG(p+1*4);	c.minx = 0;	c.miny = 0;	c.maxx = 16;	c.maxy = 32;	c.data = p + 2*4;	drawwincursor(w, &c);	return 0;} intcursorwrite(Window *w, char *buf, int n){	if(infernocursorwrite(w, buf, n) < 0 &&	plan9cursorwrite(w, buf, n) < 0){		w->cursor.h = 0;		xsetcursor(w);	}	return 0;}