- Processing
- p5.js
- Processing.py
- Processing for Android
- Processing for Pi

- Processing Foundation

This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.

Class | PImage
Name | ### updatePixels()
Examples |
    PImage myImage;
    int halfImage;

    void setup() {
      size(100, 100);
      halfImage = width * height/2;
      myImage = loadImage("apples.jpg");
      myImage.loadPixels();
      for (int i = 0; i < halfImage; i++) {
        myImage.pixels[i+halfImage] = myImage.pixels[i];
      }
      myImage.updatePixels();
    }

    void draw() {
      image(myImage, 0, 0);
    }
Description | Updates the image with the data in its pixels[] array. Use in conjunction with loadPixels(). If you're only reading pixels from the array, there's no need to call updatePixels().
Syntax |
    pimg.updatePixels()
    pimg.updatePixels(x, y, w, h)
Parameters |
pimg | PImage: any object of type PImage
x | int: x-coordinate of the upper-left corner
y | int: y-coordinate of the upper-left corner
w | int: width
h | int: height
Returns | void

Updated on January 9, 2020 00:33:12pm EST