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Unity Engine

SetPixel(int, int, Color, int)

Sets the pixel color at coordinates ( x, y ).
Read time 2 minutesLast updated 4 days ago

Definition

  • Type: Method
  • Namespace: UnityEngine
  • Assembly: UnityEngine.CoreModule
public void SetPixel(int x, int y, Color color, int mipLevel)

Parameters

x

int
The x coordinate of the pixel to set. The range is 
0
through (texture width - 1).

y

int
The y coordinate of the pixel to set. The range is 
0
through (texture height - 1).

color

Color
The color to set.

mipLevel

int
The mipmap level to write to. The range is 
0
through the texture's Texture.mipmapCount. The default value is 
0
.

Remarks

This method sets pixel data for the texture in CPU memory. Texture.isReadable must be 
true
, and you must call Texture2D.Apply after 
SetPixel
to upload the changed pixels to the GPU.
Texture2D.Apply is an expensive operation because it copies all the pixels in the texture even if you've only changed some of the pixels, so change as many pixels as possible before you call it.
SetPixel
might be slower than some other texture methods because it converts the Color struct into the format the texture uses. To set pixel data more quickly, use Texture2D.SetPixelData instead.
The lower left corner is (0, 0). If the pixel coordinate is outside the texture's dimensions, Unity clamps or repeats it, depending on the texture's TextureWrapMode.
If you need to get a large block of pixels, it might be faster to use Texture2D.SetPixels32.
You can use 
SetPixel
with the following texture formats:
  • Alpha8
  • ARGB32
  • ARGB4444
  • BGRA32
  • R16
  • R16_SIGNED
  • R8
  • R8_SIGNED
  • RFloat
  • RG16
  • RG16_SIGNED
  • RG32
  • RG32_SIGNED
  • RGB24
  • RGB24_SIGNED
  • RGB48
  • RGB48_SIGNED
  • RGB565
  • RGB9e5Float
  • RGBA32
  • RGBA32_SIGNED
  • RGBA4444
  • RGBA64
  • RGBA64_SIGNED
  • RGBAFloat
  • RGBAHalf
  • RGFloat
  • RGHalf
  • RHalf
For all other formats, Unity ignores 
SetPixel
.
Additional Resources: Texture2D.SetPixels, Texture2D.SetPixelData, Texture2D.GetPixel, Texture2D.Apply.

Examples

using UnityEngine;using System.Collections;public class ExampleClass : MonoBehaviour{    void Start()    {        Texture2D texture = new Texture2D(128, 128);        GetComponent<Renderer>().material.mainTexture = texture;        for (int y = 0; y < texture.height; y++)        {            for (int x = 0; x < texture.width; x++)            {                Color color = ((x & y) != 0 ? Color.white : Color.gray);                texture.SetPixel(x, y, color);            }        }        texture.Apply();    }}