lkarch.org/tools/radius-raid/js/text.js

$.textLine = function( opt ) {
	var textLength = opt.text.length,
		size = 5;
	for( var i = 0; i < textLength; i++ ) {
		var letter = $.definitions.letters[ ( opt.text.charAt( i ) ) ] || $.definitions.letters[ 'unknown' ];
		for( var y = 0; y < size; y++ ) {
			for( var x = 0; x < size; x++ ) {
				if( letter[ y ][ x ] === 1 ) {
					opt.ctx.rect( opt.x + ( x * opt.scale ) + ( ( size * opt.scale ) + opt.hspacing ) * i, opt.y + y * opt.scale, opt.scale, opt.scale );
				}
			}
		}
	}
};

$.text = function( opt ) {
	var size = 5,
		letterSize = size * opt.scale,
		lines = opt.text.split('\n'),
		linesCopy = lines.slice( 0 ),
		lineCount = lines.length,
		longestLine = linesCopy.sort( function ( a, b ) { return b.length - a.length; } )[ 0 ],
		textWidth = ( longestLine.length * letterSize ) + ( ( longestLine.length - 1 ) * opt.hspacing ),
		textHeight = ( lineCount * letterSize ) + ( ( lineCount - 1 ) * opt.vspacing );

	var sx = opt.x,
		sy = opt.y,
		ex = opt.x + textWidth,
		ey = opt.y + textHeight;

	if( opt.halign == 'center' ) {
		sx = opt.x - textWidth / 2;
		ex = opt.x + textWidth / 2;
	} else if( opt.halign == 'right' ) {
		sx = opt.x - textWidth;
		ex = opt.x;
	}

	if( opt.valign == 'center' ) {
		sy = opt.y - textHeight / 2;
		ey = opt.y + textHeight / 2;
	} else if( opt.valign == 'bottom' ) {
		sy = opt.y - textHeight;
		ey = opt.y;
	}

	var	cx = sx + textWidth / 2,
		cy = sy + textHeight / 2;

	if( opt.render ) {
		for( var i = 0; i < lineCount; i++ ) {
			var line = lines[ i ],			
				lineWidth = ( line.length * letterSize ) + ( ( line.length - 1 ) * opt.hspacing ),
				x = opt.x,
				y = opt.y + ( letterSize + opt.vspacing ) * i;

			if( opt.halign == 'center' ) {
				x = opt.x - lineWidth / 2;
			} else if( opt.halign == 'right' ) {
				x = opt.x - lineWidth;
			}

			if( opt.valign == 'center' ) {
				y = y - textHeight / 2;
			} else if( opt.valign == 'bottom' ) {
				y = y - textHeight;
			}

			if( opt.snap ) {
				x = Math.floor( x );
				y = Math.floor( y );
			}

			$.textLine( {
				ctx: opt.ctx,
				x: x,
				y: y,
				text: line,
				hspacing: opt.hspacing,
				scale: opt.scale
			} );
		}
	}

	return {
		sx: sx,
		sy: sy,
		cx: cx,
		cy: cy,
		ex: ex,
		ey: ey,
		width: textWidth,
		height: textHeight
	}
};