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Index › Programming Questions & Help › Syntax Questions › how to run windowless application

ynse YaBB Newbies Offline Posts: 3	how to run windowless application? Sep 5th, 2007, 3:46pm   Hello all, I work on linux and I have an application that creates and saves a picture file, built with command-line calls in mind. However, I have no idea how to get rid of the window during the script run. I did try running the application with Java headless mode on, but without success. Any help will be greatly appreciated.

fry YaBB Moderator Offline Posts: 2623 mass, usa	Re: how to run windowless application? Reply #1 - Sep 5th, 2007, 4:04pm   processing is not designed to run in headless mode, sorry. it might someday be possible using a java application along with createGraphics() and/or a fake awt implementation, but it's not currently a priority.

ynse YaBB Newbies Offline Posts: 3	Re: how to run windowless application? Reply #2 - Sep 5th, 2007, 4:19pm   Ben, thanks a lot for the quick answer. If the Processing cannot do it, maybe I'll try an old hack with Xserver emulation (like Xvfb).

seltar Senior Member Offline Posts: 475

Re: how to run windowless application? Reply #3 - Sep 5th, 2007, 6:03pm   could set the sketch to output to pdf.. should keep the window from displaying update: i tested this code, and it seems to work: Code: // processing without a window // - seltar import processing.pdf.*; void setup() { size(200,200,PDF,"file.pdf"); noLoop(); } void draw() { noStroke(); fill(255,0,0); ellipse(100,100,100,100); exit(); }

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ynse YaBB Newbies Offline Posts: 3	Re: how to run windowless application? Reply #4 - Sep 5th, 2007, 6:48pm   Thanks Seltar! That indeed works. Documentation doesn't mention PDF as a valid mode for size(). Are there any other available? DXF works only with simple graphics.

fry YaBB Moderator Offline Posts: 2623 mass, usa	Re: how to run windowless application? Reply #5 - Sep 5th, 2007, 8:42pm   that's because PDF is a library, not part of the core. see the libraries reference: http://processing.org/reference/libraries/ but even though the window does not appear, it will not work in headless mode, e.g. from the command line on a *nix machine that doesn't have X running.