OpenGL in LWJGL unable to launch in xiwi window

[s5bug]

When in an xiwi window, my program is not able to launch because there is no screen available:

Exception in thread "main" java.lang.ExceptionInInitializerError
    at com.otabi.firestar.portal.main.Portal.main(Portal.java:21)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
    at org.lwjgl.opengl.XRandR.findPrimary(XRandR.java:326)
    at org.lwjgl.opengl.XRandR.ScreentoDisplayMode(XRandR.java:315)
    at org.lwjgl.opengl.LinuxDisplay$3.run(LinuxDisplay.java:746)
    at org.lwjgl.opengl.LinuxDisplay$3.run(LinuxDisplay.java:743)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.lwjgl.opengl.LinuxDisplay.init(LinuxDisplay.java:743)
    at org.lwjgl.opengl.Display.<clinit>(Display.java:138)
    ... 1 more

Which basically means this:

private static Screen findPrimary(Screen... screens) {
        for ( Screen screen : screens ) {
            if ( screen.name.equals(primaryScreenIdentifier) ) {
                return screen;
            }
        }
        // fallback
        return screens[0];
    }

And since screens[0] references the first screen, and it gives an ArrayIndexOutOfBoundsException that means that it is not there.
I know what you're thinking:
"Oh... More work on that?"
Find my code here: firestar115/PortaJ

[dnschneid]

The xrandr code in the dummy driver isn't a complete implementation, iirc.

[s5bug]

I don't know what xrandr is or what iirc is...
I do java.

 ___      .__   __. .___________. __    __    ______   .__   __.

---

/   \     |  \ |  | |           ||  |  |  |  /  __  \  |  \ |  |

\ \ / /
/ ^ \ | | | ---| |----| || | | | | | | | |
\ \ / /
/ /_\ \ | . | | | | __ | | | | | | . |
_ _/
/ ___ \ | |\ | | | | | | | | `--' | | |\ | | |
// **\ || *| || || || ____/ |**| *| |__|

On Mon, Jan 12, 2015 at 9:56 AM, David Schneider [email protected]
wrote:

The xrandr code in the dummy driver isn't a complete implementation, iirc.

—
Reply to this email directly or view it on GitHub
#1334 (comment).

[drinkcat]

In your code, I see Display.setDisplayMode(new DisplayMode(800, 600));. Are you trying to change resolution? That's probably a bad idea in xiwi context (we do not handle that). Can you start your application in a window?

I'm not sure why no screens are detected, though, as I see one in xrandr output. The only thing I can think about is that LWJGL might be using an older version of the xrandr protocol...

[s5bug]

Display.setDisplayMode(DisplayMode mode) sets the window size, not
linux's size.

On 1/15/15, drinkcat [email protected] wrote:

In your code, I see Display.setDisplayMode(new DisplayMode(800, 600));.
Are you trying to change resolution? That's probably a bad idea in xiwi
context (we do not handle that). Can you start your application in a
window?

I'm not sure why no screens are detected, though, as I see one in xrandr
output. The only thing I can think about is that LWJGL might be using an
older version of the xrandr protocol...

---

Reply to this email directly or view it on GitHub:
#1334 (comment)

 ___      .__   __. .___________. __    __    ______   .__   __.

---

/   \     |  \ |  | |           ||  |  |  |  /  __  \  |  \ |  |

\ \ / /
/ ^ \ | | | ---| |----| || | | | | | | | |
\ \ / /
/ /_\ \ | . | | | | __ | | | | | | . |
_ _/
/ ___ \ | |\ | | | | | | | | `--' | | |\ | | |
// **\ || *| || || || ____/ |**| *| |__|

[drinkcat]

Could you look into LWJGL source (or file an issue on their github repo) to understand why it is trying to access screen information through xrandr? I don't see the point of doing that in windowed mode...

[s5bug]

Sorry I haven't been here in a while. I have heard this has been fixed and seen evidence that it has been fixed. Thanks for the interest though!

And oh boy my internet signature back then.