using System;
using CPF.ReoGrid.Rendering;

namespace CPF.ReoGrid.Utility
{
	internal static class MeasureToolkit
	{
		public static float InchToPixel(float inch, float dpi)
		{
			return inch * dpi;
		}

		public static float PixelToInch(float px, float dpi)
		{
			return px / dpi;
		}

		public static float InchToPixel(float inch)
		{
			return MeasureToolkit.InchToPixel(inch, 96f);
		}

		public static float PixelToInch(float px)
		{
			return MeasureToolkit.PixelToInch(px, 96f);
		}

		public static float InchToCM(float inch)
		{
			return inch * 2.54f;
		}

		public static float CMToInch(float cm)
		{
			return cm / 2.54f;
		}

		public static float CMToPixel(float cm, float dpi)
		{
			return cm * dpi / 2.54f;
		}

		public static float PixelToCM(float px, float dpi)
		{
			return px * 2.54f / dpi;
		}

		public static float CMTOPixel(float cm)
		{
			return MeasureToolkit.CMToPixel(cm, 96f);
		}

		public static float PixelToCM(float px)
		{
			return MeasureToolkit.PixelToCM(px, 96f);
		}

		public static float EMUToPixel(int emu, float dpi)
		{
			return (float)emu / 914400f * dpi;
		}

		public static int PixelToEMU(float pixel, float dpi)
		{
			return (int)(pixel * 914400f / dpi);
		}

		public static T ScaleByDPI<T>(T val)
		{
			double num = (double)PlatformUtility.GetDPI();
			double num2 = num / 96.0;
			double num3 = (double)Convert.ChangeType(val, typeof(double));
			return (T)((object)Convert.ChangeType(num3 * num2, typeof(T)));
		}

		private const float _cm_pre_inch = 2.54f;

		private const float _windows_standard_dpi = 96f;

		public const int _emi_in_inch = 914400;
	}
}