public static void DrawMarkersNew(Graphics gfx, ICollection<PointF> pixelLocations, MarkerShape shape, float size, Color color)
{
	if (size == 0 || shape == MarkerShape.none)
		return;

	Pen pen = new Pen(color);

	Brush brush = new SolidBrush(color);

	float halfsize = size / 2;
	float halfsqrt3size = (float)0.866 * size;
	float halfsqrt2size = (float)0.707 * size;

	// adjust marker offset to improve rendering on Linux and MacOS
	float markerOffsetX = (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) ? 0 : 1;
	switch (shape)
	{
		case MarkerShape.filledCircle:
			foreach (PointF point in pixelLocations)
			{
				gfx.FillEllipse(brush: brush, x: point.X - halfsize + markerOffsetX, y: point.Y - halfsize, width: size, height: size);
			}

			break;
		case MarkerShape.openCircle:
			foreach (PointF point in pixelLocations)
			{
				gfx.DrawEllipse(pen: pen, x: point.X - halfsize + markerOffsetX, y: point.Y - halfsize, width: size, height: size);
			}

			break;
		case MarkerShape.filledSquare:
			foreach (PointF point in pixelLocations)
			{
				gfx.FillRectangle(brush: brush, x: point.X - halfsize + markerOffsetX, y: point.Y - halfsize, width: size, height: size);
			}

			break;
		case MarkerShape.openSquare:
			foreach (PointF point in pixelLocations)
			{
				gfx.DrawRectangle(pen: pen, x: point.X - halfsize + markerOffsetX, y: point.Y - halfsize, width: size, height: size);
			}

			break;
		case MarkerShape.filledDiamond:
			foreach (PointF point in pixelLocations)
			{
				// Create points that define polygon.
				PointF point1 = new PointF(point.X + markerOffsetX, point.Y + halfsize);
				PointF point2 = new PointF(point.X + markerOffsetX - halfsize, point.Y);
				PointF point3 = new PointF(point.X + markerOffsetX, point.Y - halfsize);
				PointF point4 = new PointF(point.X + markerOffsetX + halfsize, point.Y);

				PointF[] curvePoints = { point1, point2, point3, point4 };

				//Fill polygon to screen
				gfx.FillPolygon(brush, curvePoints);
			}

			break;
		case MarkerShape.openDiamond:
			foreach (PointF point in pixelLocations)
			{
				// Create points that define polygon.
				PointF point5 = new PointF(point.X + markerOffsetX, point.Y + halfsize);
				PointF point6 = new PointF(point.X + markerOffsetX - halfsize, point.Y);
				PointF point7 = new PointF(point.X + markerOffsetX, point.Y - halfsize);
				PointF point8 = new PointF(point.X + markerOffsetX + halfsize, point.Y);

				PointF[] curvePoints2 = { point5, point6, point7, point8 };

				//Draw polygon to screen
				gfx.DrawPolygon(pen, curvePoints2);
			}

			break;
		case MarkerShape.asterisk:
			//Font drawFont = new Font("CourierNew", size * 3);
			//SizeF textSize = Drawing.GDI.MeasureString(gfx, "*", drawFont);
			//float halfWidth = textSize.Width / 2;
			//float quarterHeight = textSize.Height / 4;
			foreach (PointF point in pixelLocations)
			{
				//gfx.DrawString("*", drawFont, brush, point.X - halfWidth, point.Y - quarterHeight);
				// horizontal line of the *
				gfx.DrawLine(pen, point.X + markerOffsetX - halfsize, point.Y, point.X + markerOffsetX + halfsize, point.Y);
				// vertical line of the *
				gfx.DrawLine(pen, point.X + markerOffsetX, point.Y - halfsize, point.X + markerOffsetX, point.Y + halfsize);
				// bottom-left / top-right line of the *
				gfx.DrawLine(pen, point.X + markerOffsetX - halfsqrt2size, point.Y - halfsqrt2size, point.X + markerOffsetX + halfsqrt2size, point.Y + halfsqrt2size);
				// top-left / bottom-right line of the *
				gfx.DrawLine(pen, point.X + markerOffsetX - halfsqrt2size, point.Y + halfsqrt2size, point.X + markerOffsetX + halfsqrt2size, point.Y - halfsqrt2size);
			}

			break;
		case MarkerShape.hashTag:
			Font drawFont2 = new Font("CourierNew", size * 2);
			SizeF textSize2 = Drawing.GDI.MeasureString(gfx, "#", drawFont2);
			float halfWidth2 = textSize2.Width / 2;
			float quarterHeight2 = textSize2.Height / 4;
			foreach (PointF point in pixelLocations)
			{
				gfx.DrawString("#", drawFont2, brush, point.X - halfWidth2, point.Y - quarterHeight2);
			}

			break;
		case MarkerShape.cross:
			//Font drawFont3 = new Font("CourierNew", size * 2);
			//SizeF textSize3 = Drawing.GDI.MeasureString(gfx, "+", drawFont3);
			//float halfWidth3 = textSize3.Width / (5 / 2);
			//float quarterHeight3 = textSize3.Height / 2;
			foreach (PointF point in pixelLocations)
			{
				//gfx.DrawString("+", drawFont3, brush, point.X - halfWidth3, point.Y - quarterHeight3);
				// horizontal line of the +
				gfx.DrawLine(pen, point.X + markerOffsetX - halfsize, point.Y, point.X + markerOffsetX + halfsize, point.Y);
				// vertical line of the +
				gfx.DrawLine(pen, point.X + markerOffsetX, point.Y - halfsize, point.X + markerOffsetX, point.Y + halfsize);
			}

			break;
		case MarkerShape.eks:
			//Font drawFont4 = new Font("CourierNew", size * 2);
			//SizeF textSize4 = Drawing.GDI.MeasureString(gfx, "x", drawFont4);
			//float halfWidth4 = textSize4.Width / (5 / 2);
			//float quarterHeight4 = textSize4.Height / 2;
			float sqrt2size = (float)1.414 * size;
			foreach (PointF point in pixelLocations)
			{
				//gfx.DrawString("x", drawFont4, brush, point.X - halfWidth4, point.Y - quarterHeight4);
				// bottom-left / top-right line of the x
				gfx.DrawLine(pen, point.X + markerOffsetX - sqrt2size, point.Y - sqrt2size, point.X + markerOffsetX + sqrt2size, point.Y + sqrt2size);
				// top-left / bottom-right line of the x
				gfx.DrawLine(pen, point.X + markerOffsetX - sqrt2size, point.Y + sqrt2size, point.X + markerOffsetX + sqrt2size, point.Y - sqrt2size);
			}

			break;
		case MarkerShape.verticalBar:
			//Font drawFont5 = new Font("CourierNew", size * 2);
			//SizeF textSize5 = Drawing.GDI.MeasureString(gfx, "|", drawFont5);
			//float halfWidth5 = textSize5.Width / (5 / 2);
			//float quarterHeight5 = textSize5.Height / 2;
			foreach (PointF point in pixelLocations)
			{
				//gfx.DrawString("|", drawFont5, brush, point.X - halfWidth5, point.Y - quarterHeight5);
				// vertical line of the *
				gfx.DrawLine(pen, point.X + markerOffsetX, point.Y - halfsize, point.X + markerOffsetX, point.Y + halfsize);
			}

			break;
		case MarkerShape.triUp:
			foreach (PointF point in pixelLocations)
			{
				// Create points that define polygon.
				PointF point9 = new PointF(point.X + markerOffsetX, point.Y - size);
				PointF point10 = new PointF(point.X + markerOffsetX, point.Y);
				PointF point11 = new PointF(point.X + markerOffsetX - halfsqrt3size, point.Y + halfsize);
				PointF point12 = new PointF(point.X + markerOffsetX, point.Y);
				PointF point13 = new PointF(point.X + markerOffsetX + halfsqrt3size, point.Y + halfsize);

				PointF[] curvePoints3 = { point12, point9, point10, point11, point12, point13 };

				//Draw polygon to screen
				gfx.DrawPolygon(pen, curvePoints3);
			}

			break;
		case MarkerShape.triDown:
			foreach (PointF point in pixelLocations)
			{
				// Create points that define polygon.
				PointF point14 = new PointF(point.X + markerOffsetX, point.Y + size);
				PointF point15 = new PointF(point.X + markerOffsetX, point.Y);
				PointF point16 = new PointF(point.X + markerOffsetX - halfsqrt3size, point.Y - halfsize);
				PointF point17 = new PointF(point.X + markerOffsetX, point.Y);
				PointF point18 = new PointF(point.X + markerOffsetX + halfsqrt3size, point.Y - halfsize);

				PointF[] curvePoints4 = { point17, point14, point15, point16, point17, point18 };

				//Draw polygon to screen
				gfx.DrawPolygon(pen, curvePoints4);
			}

			break;
		case MarkerShape.none:
			break;
		default:
			throw new NotImplementedException($"unsupported marker type: {shape}");
	}
}