lib/tagcanvas.js
function AddShadowToImage(i, w, h, scale, sc, sb, so) {
  var sw = abs(so[0]), sh = abs(so[1]),
    cw = w + (sw > sb ? sw + sb : sb * 2) * scale,
    ch = h + (sh > sb ? sh + sb : sb * 2) * scale,
    xo = scale * ((sb || 0) + (so[0] < 0 ? sw : 0)),
    yo = scale * ((sb || 0) + (so[1] < 0 ? sh : 0)), cv, c;
  cv = NewCanvas(cw, ch);
  if(!cv)
    return null;
  c = cv.getContext('2d');
  sc && (c.shadowColor = sc);
  sb && (c.shadowBlur = sb * scale);
  so && (c.shadowOffsetX = so[0] * scale, c.shadowOffsetY = so[1] * scale);
  c.drawImage(i, xo, yo, w, h);
  return {image: cv, width: cw / scale, height: ch / scale};
}
function AddShadowToImage(i, w, h, scale, sc, sb, so) {
  var sw = abs(so[0]), sh = abs(so[1]),
    cw = w + (sw > sb ? sw + sb : sb * 2) * scale,
    ch = h + (sh > sb ? sh + sb : sb * 2) * scale,
    xo = scale * ((sb || 0) + (so[0] < 0 ? sw : 0)),
    yo = scale * ((sb || 0) + (so[1] < 0 ? sh : 0)), cv, c;
  cv = NewCanvas(cw, ch);
  if(!cv)
    return null;
  c = cv.getContext('2d');
  sc && (c.shadowColor = sc);
  sb && (c.shadowBlur = sb * scale);
  so && (c.shadowOffsetX = so[0] * scale, c.shadowOffsetY = so[1] * scale);
  c.drawImage(i, xo, yo, w, h);
  return {image: cv, width: cw / scale, height: ch / scale};
}
function AddShadowToImage ( i , w , h , scale , sc , sb , so ) { var sw = abs ( so [ 0 ] ) , sh = abs ( so [ 1 ] ) , cw = w + ( sw > sb ? sw + sb : sb * 2 ) * scale , ch = h + ( sh > sb ? sh + sb : sb * 2 ) * scale , xo = scale * ( ( sb || 0 ) + ( so [ 0 ] < 0 ? sw : 0 ) ) , yo = scale * ( ( sb || 0 ) + ( so [ 1 ] < 0 ? sh : 0 ) ) , cv , c ; cv = NewCanvas ( cw , ch ) ; if ( ! cv ) return null ; c = cv . getContext ( '2d' ) ; sc && ( c . shadowColor = sc ) ; sb && ( c . shadowBlur = sb * scale ) ; so && ( c . shadowOffsetX = so [ 0 ] * scale , c . shadowOffsetY = so [ 1 ] * scale ) ; c . drawImage ( i , xo , yo , w , h ) ; return { image : cv , width : cw / scale , height : ch / scale } ; }
Creates a new canvas containing the image and its shadow
Returns an object containing the image and its dimensions at z=0
Creates a new canvas containing the image and its shadow Returns an object containing the image and its dimensions at z = 0