OutOfMemory PImage/PGraphics problem

Programming Questions

sillyexam..

OutOfMemory PImage/PGraphics problem

in Programming Questions • 1 year ago

First off, I jus wanna say thanks to everybody on these forums for their help with the issues I have posted up in the past few weeks.

Secondly, I have another issue..

( sample code in first reply)

I am currently working on a drawing application that uses a png image as its "ink".

The image is loaded into a PImage variable called "pen1" at the begining of the program.

When the user pressed down on the mouse the image is drawn to a JAVA2D PGRAPHICS at mousex,mousey.

The image itself is only 20*20 pixels.

Also, if i replace:

image(pen1,mouseX,mouseY,20,20);

with:

rect(mouseX,mouseY,20,20);

..it works fine..

It works fine for about 50-100 draws and then it crashes with the following error:

An OutOfMemoryError means that your code is either using up too much memory
because of a bug (e.g. creating an array that's too large, or unintentionally
loading thousands of images), or that your sketch may need more memory to run.
If your sketch uses a lot of memory (for instance if it loads a lot of data files)
you can increase the memory available to your sketch using the Preferences window.
Exception in thread "Animation Thread" java.lang.OutOfMemoryError: Java heap space

Replies(5)

sillyexam..

Re: OutOfMemory PImage problem

1 year ago

Here is a copy of similar code, the issue is occurring because of the following line:

graphic=createGraphics(700, 700, JAVA2D);

as it is being called too often but I do need to be able to clear the graphic variable very often.

Is there a cleaner way to achieve this?

PImage img;
PGraphics graphic;
void setup(){
size(700,700);
img=loadImage("img.png");
graphic=createGraphics(700, 700, JAVA2D);
}
void draw(){
graphic=createGraphics(700, 700, JAVA2D);
graphic.beginDraw();
graphic.image(img,mouseX,mouseY,10,10);
graphic.endDraw();
image(graphic,0,0);
}

tfguy44

Re: OutOfMemory PImage/PGraphics problem

1 year ago

Comment out line 13.
You've already created the PGraphics object in setup() - there is no need to redo it 60 times a second in draw()!

You might also want to add the lines:

background(0);

and

graphic.background(0);