processing examples renderer

https://discourse.processing.org/t/problem-installing-a-library-chroma/15469/4

reported by @ paulstgeorge

the library seems to work with

size(500,500,P2D);
//or
size(500,500);

and example tintBoxes

void setup() {

    size(CANVAS_X, CANVAS_Y, "processing.core.PGraphicsRetina2D");

gives error, need to use

void settings() {
    size(CANVAS_X, CANVAS_Y, P2D);
}
void setup(){}

And size() should not use variables https://github.com/processing/processing/wiki/Changes-in-3.0

And saveFrame() should not be used inside keyReleased() https://github.com/neilpanchal/Chroma/tree/master/examples

@paulstgeorge -- do you know how to fork and create a pull request with your suggested changes?

@jeremydouglass I don't know how to fork and create a pull request, but the suggestions are important. The third problem crashes Processing. Can you tell me how to report?

Fork this repository to your account with the fork button. Make changes to your fork -- either through Editing files with the github web interface, or through cloning to your computer. When you are done, you can start a pull request to send your proposed changes back to this repo.

https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/creating-a-pull-request-from-a-fork

For an overview:

https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/proposing-changes-to-your-work-with-pull-requests

@jeremydouglass @paulstgeorge @kllsamui I'll take a look, thanks for reporting.