Texture2D SetPixel & GetPixel values not identical

Questions & Answers
1

When I Use SetPixel and GetPixel to wirte & read value in the texture,the value is not the same value i put there.Why is this happen?
Code is simple:

Texture2D texture2d = new Texture2D(512, 512, TextureFormat.RGBA32, false);
Color color = new Color(0.002, 0.10113, 0.01153, 0.11114);
texture2d.SetPixel(0, 0, color);
texture2d.Apply();
Color output = texture2d.GetPixel(0, 0);

// output = (0.003921569, 0.1019608, 0.01176471, 0.1098039);
Could anyone tell my why?

2

This is because TextureFormat.RGBA32 stores every channel value as byte (unsigned 8-bit integer) while UnityEngine.Color uses System.Single (signed 32-bit float) and conversion between those types is lossy.

3

Thank you!!.What you said is very clear to me.Finally i figure it out.