Version: 2019.1 (switch to 2018.3 or 2017.4)
LanguageEnglish
  • C#

Texture2D.SetPixels

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

public void SetPixels(Color[] colors, int miplevel = 0);

Parameters

colorsThe array of pixel colours to assign (a 2D image flattened to a 1D array).
miplevelThe mip level of the texture to write to.

Description

Set a block of pixel colors.

This function takes a color array and changes the pixel colors of the whole mip level of the texture. Call Apply to actually upload the changed pixels to the graphics card.

The colors array is a flattened 2D array, where pixels are laid out left to right, bottom to top (i.e. row after row). Array size must be at least width by height of the mip level used. The default mip level is zero (the base texture) in which case the size is just the size of the texture. In general case, mip level size is mipWidth=max(1,width>>miplevel) and similarly for height.

This function works only on RGBA32, ARGB32, RGB24 and Alpha8 texture formats. For other formats SetPixels is ignored. The texture also has to have read/write enabled flag set in the texture import settings.

Using SetPixels can be much faster than calling SetPixel repeatedly, especially for large textures. In addition, SetPixels can access individual mipmap levels. For an even faster pixel data access, use GetRawTextureData that returns a NativeArray.

See Also: GetPixels, SetPixels32, Apply, GetRawTextureData, LoadRawTextureData, mipmapCount.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { void Start() { Renderer rend = GetComponent<Renderer>();

// duplicate the original texture and assign to the material Texture2D texture = Instantiate(rend.material.mainTexture) as Texture2D; rend.material.mainTexture = texture;

// colors used to tint the first 3 mip levels Color[] colors = new Color[3]; colors[0] = Color.red; colors[1] = Color.green; colors[2] = Color.blue; int mipCount = Mathf.Min(3, texture.mipmapCount);

// tint each mip level for (int mip = 0; mip < mipCount; ++mip) { Color[] cols = texture.GetPixels(mip); for (int i = 0; i < cols.Length; ++i) { cols[i] = Color.Lerp(cols[i], colors[mip], 0.33f); } texture.SetPixels(cols, mip); } // actually apply all SetPixels, don't recalculate mip levels texture.Apply(false); } }

public void SetPixels(int x, int y, int blockWidth, int blockHeight, Color[] colors, int miplevel = 0);

Description

Set a block of pixel colors.

This function is an extended version of SetPixels above; it does not modify the whole mip level but modifies only blockWidth by blockHeight region starting at x,y. The colors array must be blockWidth*blockHeight size, and the modified block must fit into the used mip level.

Did you find this page useful? Please give it a rating: