loadPixels()

本参考资料用于Processing 3.0+。 如果你使用的是前一版本,请在使用软件帮助菜单内的参考资料。. 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.

名称

loadPixels()

示例

int halfImage = width*height/2;

PImage myImage = loadImage("apples.jpg");

image(myImage, 0, 0);

loadPixels();


for (int i = 0;

i < halfImage;

i++)
{  
pixels[i+halfImage] = pixels[i];


  } updatePixels();

描述 Loads a snapshot of the current display window into the pixels[] array. This function must always be called before reading from or writing to pixels[]. Subsequent changes to the display window will not be reflected in pixels until loadPixels() is called again.

Certain renderers may or may not seem to require loadPixels() or updatePixels(). However, the rule is that any time you want to manipulate the pixels[] array, you must have previously called loadPixels(), and after changes have been made, call updatePixels(). Even if the renderer may not seem to use this function in the current Processing release, this will always be subject to change.

语法
loadPixels()
返回值 void
相关 pixels[]
updatePixels()

Updated on October 2, 2018 05:02:08pm EDT

loadPixels()