stringAnchorRgba method

bool stringAnchorRgba(Point<double> p, String s, Point<double> anchorPoint, int r, int g, int b, int a, { int? charRotation, })

Implementation

bool stringAnchorRgba(math.Point<double> p, String s,
    math.Point<double> anchorPoint, int r, int g, int b, int a,
    {int? charRotation}) {
  bool result = true;
  double curx = p.x;
  double cury = p.y;
  double stringWidth = s.length * gfx.charWidthLocal.toDouble();
  double stringHeight = gfx.charHeightLocal.toDouble();
  double calcx = 0;
  double calcy = 0;
  charRotation ??= gfx.charRotation;
  switch (charRotation) {
    case 0:
      calcx = -stringWidth * anchorPoint.x;
      calcy = -stringHeight * anchorPoint.y;
      break;
    case 2:
      calcx = stringWidth * anchorPoint.x;
      calcy = -stringHeight * anchorPoint.y;
      break;
    case 1:
      calcx = -stringHeight * anchorPoint.y;
      calcy = -stringWidth * anchorPoint.x;
      break;
    case 3:
      calcx = -stringHeight * anchorPoint.y;
      calcy = stringWidth * anchorPoint.x;
      break;
  }
  for (var i = 0; i < s.length; i++) {
    var curchar = s[i];
    if (result) {
      result = gfx.characterRgba(this, curx + calcx, cury + calcy,
          curchar.codeUnitAt(0), r, g, b, a);
    }
    switch (charRotation) {
      case 0:
        curx += gfx.charWidthLocal;
        break;
      case 2:
        curx -= gfx.charWidthLocal;
        break;
      case 1:
        cury += gfx.charHeightLocal;
        break;
      case 3:
        cury -= gfx.charHeightLocal;
        break;
    }
  }
  return result;
}