How to temporarily store the screen

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processor..

How to temporarily store the screen

in General Discussion • Other • 7 months ago

Hi:

I'm displaying a message on the screen when the user does the wrong action. When the mouse is clicked, dragged or moved I'm clearing the message by loading and imaging a saved pre-message screen. Its working fine; but I think it can be done more efficiently in a way I don't have to save, load and image the pre message screen. Maybe if the screen can be saved in the memory and not actually written in the hard drive?. Can it be done? Is there any other faster and more efficient way of doing this? If the image is saved as .jpg it loses quality in a slighly noticeable way when it is reloaded and dispalyed. If it is saved as .png it takes longer to save and the elapsed time is slighly noticed also.

Thanks

Replies(6)

Chrisir

Re: How to temporarily store the screen

7 months ago

1st
1st you can just load the image once in setup()
and only use it in draw() when needed - much faster than load again and again - to do stuff only once is the purpose of setup()

2nd
but of course you can just grab a screen and display it

PImage img2 = get(0, 0, width, height); 

http://www.processing.org/reference/get_.html

and then display img2

3rd
you can also create images behinad the scene
http://www.processing.org/reference/createImage_.html

processor..

Re: How to temporarily store the screen

7 months ago

Thanks. I'll ckeck those links. I'm not refering to the set up solution. I'm refering to when I need to save the screen already advanced in the program execution when the user does something wrong and I need to display a message.

Thanks again.

Chrisir

Re: How to temporarily store the screen

7 months ago

OK

that sounds like this program.

because you don't have to save anything
you just paint your stuff and display the message if needed

you can even ignore mouse if userDidSomethingWrong is true

void draw() {
background(0);
paint stuff;
if (userDidSomethingWrong)
showMessage ();
if timer over .........11 seconds
userDidSomethingWrong=false;
}

with showMessage () you can use text() and whatever to show a message

GoToLoop

Re: How to temporarily store the screen

7 months ago

Extra tidbit:
get() w/o any parameters already does the same thing as -> get (0, 0, width , height ).

processor..

Re: How to temporarily store the screen

7 months ago

get(); solved all my problems.

all the code was already written I just had to replace save and load by get();

As they mentioned there is no need for parameters as I'm getting the whole screen. Everything is the way I wanted now. No need to save and load anymore. It was working; but I knew it was not efficient. Now it is.

Basically I'm getting the premessage screen and redisplaying it after the mouse is clicked moved or dragged or time expires. In that way I clear the warning message. Works just fine.

Thanks again.

Chrisir

Re: How to temporarily store the screen

7 months ago

sounds good!

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