"Shader status invalid" with latest jars and GLJpanel

> Hi your code only trigger an exception by your GPU driver.
> This is probably identical to the
> https://jogamp.org/bugzilla/show_bug.cgi?id=711 bug.
> http://forum.jogamp.org/curve-TextRenderer-GL3-couldn-t-link-program-tp4028852.html
>
> ERROR: 0:12: '' : Declaration must include a precision qualifier or the
> default precision must have been previously declared.
> ERROR:  compilation errors.  No code generated.
>
> Basically when using GL3 it is required to add precision qualifiers inside the
> shader sourcecode or else you will hit this exception when the GPU driver
> compiles the code.

>
>
> 2013/5/15 BFarns [via jogamp] <[hidden email]>
>
>     Hi, I use jzy3d which uses JOGL, so I'm not that familiar with the code
>     itself. This is also my first time posting and I didn't see any
>     guidelines, but if I'm missing something and posting incorrectly please
>     send me a link.
>
>     We were using JOGL v2-RC 11, running on Windows 7 with ATI firepro 2260
>     graphics cards. We have been experiencing jvm crashes as well as windows
>     crashes recently when using JOGL (through jzy3d). The crashes seem to be
>     related to removing and adding the canvases to panels, since it usually
>     happens after doing this a few times it seems. We tried updating our
>     drivers but were still getting the jvm crashes. For most of the crashes,
>     the stack trace in the dump file looked almost identical to the one in
>     this bug:
>
>     https://jogamp.org/bugzilla/show_bug.cgi?id=706
>
>     So I tried pulling the jars mentioned in the bug, as they said there was a
>     workaround. I also tried the most recent jars, from May 11, but in both I
>     get exceptions, which I posted below. This is using the GLJPanel (as you
>     can see in the stack trace). Any pointers for what might have changed
>     since RC11 that could cause this, how to fix?
>
>     Exception:
>
>     ///
>     Shader status invalid: Fragment shader failed to compile with the
>     following errors:
>     ERROR: 0:12: '' : Declaration must include a precision qualifier or the
>     default precision must have been previously declared.
>     ERROR:  compilation errors.  No code generated.
>
>     javax.media.opengl.GLException: Couldn't link program: ShaderProgram[id=1,
>     linked=false, inUse=false, program: 1,
>        ShaderCode[id=1, type=VERTEX_SHADER, valid=true, shader:  2, source]
>        ShaderCode[id=2, type=FRAGMENT_SHADER, valid=false, shader:  3, source]]
>             at
>     jogamp.opengl.util.glsl.GLSLTextureRaster.init(GLSLTextureRaster.java:80)
>             at
>     javax.media.opengl.awt.GLJPanel$OffscreenBackend.initialize(GLJPanel.java:1045)
>
>             at
>     javax.media.opengl.awt.GLJPanel.createAndInitializeBackend(GLJPanel.java:766)
>             at javax.media.opengl.awt.GLJPanel.paintComponent(GLJPanel.java:401)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintChildren(Unknown Source)
>             at javax.swing.JComponent.paint(Unknown Source)
>             at javax.swing.JComponent.paintToOffscreen(Unknown Source)
>             at
>     javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
>             at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
>             at javax.swing.RepaintManager.paint(Unknown Source)
>             at javax.swing.JComponent._paintImmediately(Unknown Source)
>             at javax.swing.JComponent.paintImmediately(Unknown Source)
>             at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
>             at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
>             at javax.swing.RepaintManager.seqPaintDirtyRegions(Unknown Source)
>             at
>     javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown
>     Source)
>             at java.awt.event.InvocationEvent.dispatch(Unknown Source)
>             at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
>             at java.awt.EventQueue.access$000(Unknown Source)
>             at java.awt.EventQueue$1.run(Unknown Source)
>             at java.awt.EventQueue$1.run(Unknown Source)
>             at java.security.AccessController.doPrivileged(Native Method)
>             at
>     java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
>             at java.awt.EventQueue.dispatchEvent(Unknown Source)
>             at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown
>     Source)
>             at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
>             at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
>     Source)
>             at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>             at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>             at java.awt.EventDispatchThread.run(Unknown Source)
>
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> On 05/15/2013 10:43 PM, Xerxes Rånby [via jogamp] wrote:
>> Hi your code only trigger an exception by your GPU driver.
>> This is probably identical to the
>> https://jogamp.org/bugzilla/show_bug.cgi?id=711 bug.
>> http://forum.jogamp.org/curve-TextRenderer-GL3-couldn-t-link-program-tp4028852.html
>>
>> ERROR: 0:12: '' : Declaration must include a precision qualifier or the
>> default precision must have been previously declared.
>> ERROR:  compilation errors.  No code generated.
>>
>> Basically when using GL3 it is required to add precision qualifiers inside the
>> shader sourcecode or else you will hit this exception when the GPU driver
>> compiles the code.
>
> Yup, will add unit tests w/ GL3 core only and GLJPanel (if non existent, ..hmm).
> We will also need to catch the exception to follow the fallback
> CPU based vertical flip strategy, in case of buggy GLSL compiler.
>