<AWT Dev> [OpenJDK 2D-Dev] [PATCH] 6636469: Java Fullscreen Exclusive Mode not working with Xorg server 1.3.0 and above

[Phil Race]

Dan,
We can't take this fix as you have not signed the SCA and your name does not
appear here : https://sca.dev.java.net/CA_signatories.htm#m

-phil

Dan Munckton wrote:
> Hi Oleg, Dmitry, Yuri, all
>
> Please find attached my first attempt at fixing bug 6636469 [0].
>
>
> APPROACH
>
> The fix is really simple it just checks to make sure RANDR's version is
> 1.2 or greater if usingXinerama is true, if this is all fine it proceeds
> to load the libXrandr funcs.
>
> For the moment I've completely ignored 6599351, and not touched any of
> the Xinerama loading code at all. 
>
> BTW I note that with 6599351 the user has an old style X dual-head
> config without using Xinerama - I found a note on the Debian Xrandr1.2
> Howto wiki page [1] explaining that this configuration should crash
> Xserver 1.3. Does it behave differently in Solaris X?
>
>
> TESTING
>
> The equipment I have here will allow me to test single monitor setups
> with X servers 1.2 and 1.3. Java now behaves as expected in the
> following cases:
>
> 1) Xserver 1.2 + 1 monitor + Xrandr
> 	Expect: isFullScreenSupported: true
> 	Result: PASS
>
> 2) Xserver 1.2 + 1 monitor + Xinerama enabled (Xinerama won't actually
> load but Xrandr and DRI won't load either)
> 	Expect: isFullScreenSupported: false
> 	Result: PASS
>
> 3) Xserver 1.3 + 1 monitor + Xrandr + fake Xinerama
> 	Expect: isFullScreenSupported: true
> 	Result: PASS
>
> 4) Xserver 1.3 + 1 monitor + Xinerama enabled (Xinerama won't actually
> load but Xrandr and DRI won't load either)
> 	Expect: isFullScreenSupported: false
> 	Result: PASS
>
>
> TESTING TODO
>
> I have an external LCD monitor at work which I can hook up to my laptop
> next week. This should allow me to test out Xrandr 1.2 multi-monitor
> setups. I'll post results as soon as complete.
>
> However I don't think I can test out Xinerama dual head configs. I tried
> to set this up once before but failed - I'm still not 100% certain if
> Xinerama is actually compiled into my X server I will need to check this
> out properly. 
>
> If anyone here has a multi monitor setup already and would be prepared
> to help me test the following scenarios I'd be very grateful.
>
> 5) Xserver 1.2 + 2 monitor + Xinerama (Xrandr and DRI won't load)
> 	Expect: isFullScreenSupported: false
>
> 6) Xserver 1.3 + 2 monitors + Xinerama
> 	Expect: isFullScreenSupported: false
>
> I am also still to run the jtreg tests against this. I will come back
> with results.
>
> Also, do I need to mail both awt-dev and 2d-dev or will just one do in
> future?
>
> Cheers
>
> Dan
>
>
> [0] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6636469
> [1] Section VI.3 of http://wiki.debian.org/XStrikeForce/HowToRandR12
>   
> ------------------------------------------------------------------------
>
> diff -r 99a06bc7fdb5 -r 7e529c4088cc src/solaris/native/sun/awt/awt_GraphicsEnv.c
> --- a/src/solaris/native/sun/awt/awt_GraphicsEnv.c	Tue Dec 04 16:28:33 2007 -0800
> +++ b/src/solaris/native/sun/awt/awt_GraphicsEnv.c	Sat Dec 08 13:29:25 2007 +0000
> @@ -1626,6 +1626,8 @@ Java_sun_awt_X11GraphicsEnvironment_getX
>  
>  #define BIT_DEPTH_MULTI java_awt_DisplayMode_BIT_DEPTH_MULTI
>  
> +typedef Status
> +    (*XRRQueryVersionType) (Display *dpy, int *major_versionp, int *minor_versionp);
>  typedef XRRScreenConfiguration*
>      (*XRRGetScreenInfoType)(Display *dpy, Drawable root);
>  typedef void
> @@ -1650,6 +1652,7 @@ typedef Status
>                                       short rate,
>                                       Time timestamp);
>  
> +static XRRQueryVersionType               awt_XRRQueryVersion;
>  static XRRGetScreenInfoType              awt_XRRGetScreenInfo;
>  static XRRFreeScreenConfigInfoType       awt_XRRFreeScreenConfigInfo;
>  static XRRConfigRatesType                awt_XRRConfigRates;
> @@ -1672,11 +1675,37 @@ static jboolean
>  static jboolean
>  X11GD_InitXrandrFuncs(JNIEnv *env)
>  {
> +    int rr_maj_ver = 0, rr_min_ver = 0;
> +
>      void *pLibRandR = dlopen("libXrandr.so.2", RTLD_LAZY | RTLD_LOCAL);
>      if (pLibRandR == NULL) {
>          J2dRlsTraceLn(J2D_TRACE_ERROR,
>                        "X11GD_InitXrandrFuncs: Could not open libXrandr.so.2");
>          return JNI_FALSE;
> +    }
> +
> +    LOAD_XRANDR_FUNC(XRRQueryVersion);
> +
> +    if (!(*awt_XRRQueryVersion)(awt_display, &rr_maj_ver, &rr_min_ver)) {
> +        J2dRlsTraceLn(J2D_TRACE_ERROR, 
> +                    "X11GD_InitXrandrFuncs: XRRQueryVersion returned an error status");
> +        dlclose(pLibRandR);
> +        return JNI_FALSE;
> +    }
> +
> +    if (usingXinerama) {
> +        /* 
> +         * We can proceed as long as this is RANDR 1.2 
> +         * As of Xorg server 1.3 onwards the Xinerama backend may actually be
> +         * a fake one provided by RANDR itself. See Java bug 6636469 for info.
> +         */
> +        if (!(rr_maj_ver >= 1 && rr_min_ver >= 2)) {
> +            J2dRlsTraceLn2(J2D_TRACE_INFO, "X11GD_InitXrandrFuncs: Can't use Xrandr. " 
> +                        "Xinerama is active and Xrandr version is %d.%d",
> +                        rr_maj_ver, rr_min_ver);
> +            dlclose(pLibRandR);
> +            return JNI_FALSE;
> +        }
>      }
>  
>      LOAD_XRANDR_FUNC(XRRGetScreenInfo);
> @@ -1814,15 +1843,6 @@ Java_sun_awt_X11GraphicsDevice_initXrand
>      int opcode = 0, firstEvent = 0, firstError = 0;
>      jboolean ret;
>  
> -    if (usingXinerama) {
> -        /*
> -         * REMIND: we'll just punt if Xinerama is enabled; we can remove this
> -         * restriction in the future if we find Xinerama and XRandR playing
> -         * well together...
> -         */
> -        return JNI_FALSE;
> -    }
> -
>      AWT_LOCK();
>      ret = (jboolean)XQueryExtension(awt_display, "RANDR",
>                                      &opcode, &firstEvent, &firstError);
>