Draw9p.writedrawdata = function(connid, offset, data){	var conn = this.conns[connid];	if(conn == undefined){		throw("invalid draw connection");	} 	var length = data.length;	var ai = new ArrayIterator(data);	while(ai.hasRemainingBytes()){		var c = String.fromCharCode(ai.getChar());		//cons.log("writedrawdata: " + c);		if(this.drawdatahandlers[c] == undefined){			throw("bad draw command");		}else{			this.drawdatahandlers[c](conn, offset, ai);		}	}	return length;} var drawcoord = function(ai, old){	var b, x; 	b = ai.getChar();	x = b & 0x7F;	if(b & 0x80){		x |= ai.getChar() << 7;		x |= ai.getChar() << 15;		if(x & (1<<22)){			/* Not sure how ~0 would work in Javascript. */			x |= ((1<<31)|((1<<31)-1))<<23;		}	}else{		if(b & 0x40){			x |= ((1<<31)|((1<<31)-1))<<7;		}		x += old;	}	return x;} with(Draw9p){Draw9p.drawdatahandlers = {	"A": function(conn, offset, ai){		try{			var id = ai.getLong();			var imageid = ai.getLong();			var fillid = ai.getLong();			var public = ai.getChar();		}catch(e){			throw("short draw message");		}		if(conn.screens[id] != undefined){			throw("screen id in use");		}		var image = conn.imgs[imageid];		if(image == undefined){			throw("invalid image id");		}		var fill = conn.imgs[fillid];		if(fill == undefined){			throw("invalid image id");		}		conn.screens[id] = new Draw9p.Screen(id, image, fill, public);	},	"b": function(conn, offset, ai){		try{			var id = ai.getLong();			var screenid = ai.getLong();			var refresh = ai.getChar();			var chan = ai.getLong();			var repl = ai.getChar();			var r = ai.getRect();			var clipr = ai.getRect();			var color = ai.getLong();		}catch(e){			throw("short draw message");		}		if(conn.imgs[id] != undefined){			throw("image id in use");		}		if(screenid){			if(conn.screens[screenid] == undefined){				throw("invalid screen id");			}			conn.screens[screenid].imgs[id] = conn.imgs[id] =				new ScreenImage(conn.screens[screenid],					refresh, chan, repl, r, clipr, color);		}else{			conn.imgs[id] = new Image(refresh, chan, repl, r, clipr, color);		}	},	"c": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var repl = ai.getChar();			var clipr = ai.getRect();		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid image id");		}		dst.repl = repl;		dst.clipr = clipr;	},	"d": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var srcid = ai.getLong();			var maskid = ai.getLong();			var dstr = ai.getRect();			var srcp = ai.getPoint();			var maskp = ai.getPoint();		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid image id");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid image id");		}		var mask = conn.imgs[maskid];		if(mask == undefined){			throw("invalid image id");		}		drawmasked(dst, dstr, src, srcp, mask, maskp, conn.op);	},	"D": function(conn, offset, ai){		try{			var debugon = ai.getChar();		}catch(e){			throw("short draw message");		}	},	"e": function(conn, offset, ai){		cons.log("writedrawdata: 'e' (ellipse outline) unimplemented!");		try{			var dstid = ai.getLong();			var srcid = ai.getLong();			var c = ai.getPoint();			var a = ai.getLong();			var b = ai.getLong();			var thick = ai.getLong();			var sp = ai.getPoint();			var alpha = ai.getLong();			var phi = ai.getLong();		}catch(e){			throw("short draw message");		}	},	"E": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var srcid = ai.getLong();			var center = ai.getPoint();			var a = ai.getLong();			var b = ai.getLong();			var thick = ai.getLong();			var sp = ai.getPoint();			var alpha = ai.getLong();			var phi = ai.getLong();		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid destination image");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid source image");		}		Memdraw.fillellipse(dst, center, a, b, alpha, phi, src,sp, conn.op);	},	"f": function(conn, offset, ai){		try{			var id = ai.getLong();		}catch(e){			throw("short draw message");		}		var img = conn.imgs[id];		if(img == undefined){			throw("invalid image id");		}		var screen = img.screen;		if(screen){			delete screen.imgs[id];		}		img.canvas.parentNode.removeChild(img.canvas);		delete conn.imgs[id];	},	"F": function(conn, offset, ai){		cons.log("writedrawdata: 'F' (free screen) unimplemented!");		try{			var id = ai.getLong();		}catch(e){			throw("short draw message");		}	},	"i": function(conn, offset, ai){		try{			var id = ai.getLong();			var n = ai.getLong();			var ascent = ai.getChar();		}catch(e){			throw("short draw message");		}		var img = conn.imgs[id];		if(img == undefined){			throw("invalid image id");		}		img.nchar = n;		img.ascent = ascent;		img.fchar = [];		/* document.body.appendChild(img.canvas); */	},	"l": function(conn, offset, ai){		try{			var cacheid = ai.getLong();			var srcid = ai.getLong();			var index = ai.getShort();			var r = ai.getRect();			var sp = ai.getPoint();			var left = signed8dec(ai.getChar());			var width = ai.getChar();		}catch(e){			throw("short draw message");		}		var cache = conn.imgs[cacheid];		if(cache == undefined){			throw("invalid image id");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid image id");		}		cache.fchar[index] = {			r: r,			left: left,			width: width		};		drawmasked(cache, r, src, sp, undefined, undefined, Memdraw.Opdefs.SoverD.key);	},	"L": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var p0 = ai.getPoint();			var p1 = ai.getPoint();			var end0 = ai.getLong();			var end1 = ai.getLong();			var thick = ai.getLong();			var srcid = ai.getLong();			var sp = ai.getPoint();		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid image id");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid image id");		}		Memdraw.line(dst, p0, p1, end0, end1, thick,			src, sp, conn.op);	},	"N": function(conn, offset, ai){		try{			var id = ai.getLong();			var inp = ai.getChar();			var j = ai.getChar();			var name = String.fromUTF8Array(ai.getBytes(j));		}catch(e){			throw("short draw message");		}		if(inp){			if(conn.imgs[id] == undefined){				throw("invalid image id");			}			/* XXX Silently overwrites conflicting name. */			imgnames[name] = conn.imgs[id];		}else{			/* XXX Should check if this is the right image. */			delete imgnames[name];		}	},	"n": function(conn, offset, ai){		try{			var id = ai.getLong();			var j = ai.getChar();			var name = String.fromUTF8Array(ai.getBytes(j));		}catch(e){			throw("short draw message");		}		if(conn.imgs[id] != undefined){			throw("image id in use");		}		if(imgnames[name] == undefined){			throw("no image by name " + name);		}		conn.imgs[id] = imgnames[name];	},	"o": function(conn, offset, ai){		cons.log("writedrawdata: 'o' (translate window) unimplemented!");		try{			var id = ai.getLong();			var rmin = ai.getPoint();			var scr = ai.getPoint();		}catch(e){			throw("short draw message");		}		if(conn.imgs[id] == undefined){			throw("invalid image id");		}		var img = conn.imgs[id];		if(img.screen == undefined){			throw("image is not a window");		}		img.r = rectaddpt(img.r, subpt(rmin, img.r.min));		img.clipr = rectaddpt(img.clipr, subpt(rmin, img.clipr.min));		img.scrmove(scr);	},	"O": function(conn, offset, ai){		try{			var op = ai.getChar();		}catch(e){			throw("short draw message");		}		conn.op = op;	},	"p": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var n = ai.getShort() + 1;			var end0 = ai.getLong();			var end1 = ai.getLong();			var thick = ai.getLong();			var srcid = ai.getLong();			var sp = ai.getPoint();			var dp = [];			var o = new Point(0, 0);			for(var i = 0; i < n; ++i){				dp[i] = new Point(					drawcoord(ai, o.x),					drawcoord(ai, o.y)				);				o = dp[i];			}		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid image id");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid image id");		}		Memdraw.poly(dst, dp, end0, end1, thick, src, sp, conn.op);	},	"P": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var n = ai.getShort() + 1;			var wind = ai.getLong();			var ignore = ai.getPoint();			var srcid = ai.getLong();			var sp = ai.getPoint();			var dp = [];			var o = new Point(0, 0);			for(var i = 0; i < n; ++i){				var p = new Point(					drawcoord(ai, o.x),					drawcoord(ai, o.y)				);				dp[i] = o = p;			}		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid image id");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid image id");		}		Memdraw.fillpoly(dst, dp, wind, src, sp, conn.op);	},	"r": function(conn, offset, ai){		cons.log("writedrawdata: 'r' (read back rectangle) unimplemented!");		try{			var id = ai.getLong();			var r = ai.getRect();		}catch(e){			throw("short draw message");		}	},	"s": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var srcid = ai.getLong();			var fontid = ai.getLong();			var p = ai.getPoint();			var clipr = ai.getRect();			var sp = ai.getPoint();			var n = ai.getShort();			var index = [];			for(var i = 0; i < n; ++i){				index[i] = ai.getShort();			}		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid image id");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid image id");		}		var font = conn.imgs[fontid];		if(font == undefined){			throw("invalid image id");		}		if(font.fchar == undefined){			throw("not a font");		}		Memdraw.string(dst, src, font, p, clipr, sp, null, null, index, conn.op);	},	"x": function(conn, offset, ai){		try{			var dstid = ai.getLong();			var srcid = ai.getLong();			var fontid = ai.getLong();			var dp = ai.getPoint();			var clipr = ai.getRect();			var sp = ai.getPoint();			var n = ai.getShort();			var bgid = ai.getLong();			var bp = ai.getPoint();			var index = [];			for(var i = 0; i < n; ++i){				index[i] = ai.getShort();			}		}catch(e){			throw("short draw message");		}		var dst = conn.imgs[dstid];		if(dst == undefined){			throw("invalid image id");		}		var src = conn.imgs[srcid];		if(src == undefined){			throw("invalid image id");		}		var font = conn.imgs[fontid];		if(font == undefined){			throw("invalid image id");		}		if(font.fchar == undefined){			throw("not a font");		}		var bg = conn.imgs[bgid];		if(bg == undefined){			throw("invalid image id");		}		Memdraw.string(dst, src, font, dp, clipr, sp, bg, bp, index, conn.op);	},	"S": function(conn, offset, ai){		cons.log("writedrawdata: 'S' (screen attach public) unimplemented!");		try{			var id = ai.getLong();			var chan = ai.getLong();		}catch(e){			throw("short draw message");		}	},	"t": function(conn, offset, ai){		cons.log("writedrawdata: 't' (top of window stack) unimplemented!");		try{			var top = ai.getChar();			var n = ai.getShort();			var ids = [];			for(var i = 0; i < n; ++i){				ids[i] = ai.getShort();			}		}catch(e){			throw("short draw message");		}	},

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