Legacy Documentation: Version 5.2
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Texture2D.GetPixels

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public Color[] GetPixels(int miplevel = 0);

Parameters

Description

Get a block of pixel colors.

This function returns an array of pixel colors of the whole mip level of the texture.

The returned array is a flattened 2D array, where pixels are laid out left to right, bottom to top (i.e. row after row). Array size is 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.

The texture must have the Read/Write Enabled flag set in the import settings, otherwise this function will fail.

Using GetPixels can be faster than calling GetPixel repeatedly, especially for large textures. In addition, GetPixels can access individual mipmap levels. For most textures, even faster is to use GetPixels32 which returns low precision color data without costly integer-to-float conversions.

See Also: GetPixels32.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Texture2D sourceTex; public Rect sourceRect; void Start() { int x = Mathf.FloorToInt(sourceRect.x); int y = Mathf.FloorToInt(sourceRect.x); int width = Mathf.FloorToInt(sourceRect.width); int height = Mathf.FloorToInt(sourceRect.height); Color[] pix = sourceTex.GetPixels(x, y, width, height); Texture2D destTex = new Texture2D(width, height); destTex.SetPixels(pix); destTex.Apply(); GetComponent<Renderer>().material.mainTexture = destTex; } }

See Also: SetPixels, mipmapCount.


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

Parameters

Description

Get a block of pixel colors.

This function is an extended version of GetPixels above; it does not return the whole mip level but only blockWidth by blockHeight region starting at x,y. The block must fit into the used mip level. The returned array is blockWidth*blockHeight size.