Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-22 Thread Anthony Tekatch via Lazarus 
On Fri, 20 Oct 2017 22:03:34 -0400, Anthony Walter via Lazarus 
 wrote:

> I've done a bit of work on Pi and OpenGL and thought I'd give you some
> advice.
> 
> 1) Pi only supports OpenGL ES contexts
> 
> 2) Depending on your raspberry OS configuration, OpenGL ES might only be
> supported when X window manager is not running.
> 
> 2a) Raspbian defaults to allow OpenGL in with X window manager running,
> but currently the actual driver does not function to the correct OpenGL
> ES specifications under that situation.
> 
> For me personally, I configured Raspbian to use the correct OpenGL ES
> specifications, and that means the driver will fail to create a GL
> context if X windows is running. Don't ask me what the differences are,
> I really don't want to bother researching it, but there are problems.
> I've posted about it extensively on the Pi support forums and under Pi
> area of the new SDL forum.


Thank you for the notes:

My application only used OpenGL as an unnecessary side offering, so after
removing all the OpenGL references, I was able to get the application to
run.

I did end up with the following error after trying to compile:
  Error: Can't call the assembler, error -1 switching to external assembling
I solved that by reading some other postings where you suggested to
reduce the GPU memory which I did as follows:
  Raspberry menu ->
   Raspberry Pi Configuration ->
Performance ->
 GPU Memory = 32 (from 64).


I'd still like to get opengl working with my application on the RPi one
day, but it is not critical for me.


Thanks,
Anthony
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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-21 Thread Anthony Tekatch via Lazarus 
On Sat, 21 Oct 2017 10:29:25 +0200, Mattias Gaertner via Lazarus 
 wrote:
> On Fri, 20 Oct 2017 20:32:49 -0400
> Anthony Tekatch via Lazarus  wrote:
> 
> >[...]
> > Then installed Lazarus for Raspbian defined here:
> >   http://wiki.freepascal.org/Lazarus_on_Raspberry_Pi
> > sudo apt-get update
> > sudo apt-get upgrade
> > sudo apt-get install fpc
> > sudo apt-get install lazarus  
> 
> Ok. These are probably the Debian packages.
> Maybe they are doing something strange. I will check.

Thank you for checking that.

For now, I just copied the compiled lazopenglcontext files from:
  /home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2  
into my project directory.


My project compiles now but gives this error when running:

  Project myproject raised exception class 'External: SIGSEGV'.

   In file 'glgtkglxcontext.pas' at line 660:
  FBConfig := FBConfigs[BestFBConfig];


Thanks.
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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-21 Thread Mattias Gaertner via Lazarus 
On Fri, 20 Oct 2017 20:32:49 -0400
Anthony Tekatch via Lazarus  wrote:

>[...]
> Then installed Lazarus for Raspbian defined here:
>   http://wiki.freepascal.org/Lazarus_on_Raspberry_Pi
> sudo apt-get update
> sudo apt-get upgrade
> sudo apt-get install fpc
> sudo apt-get install lazarus

Ok. These are probably the Debian packages.
Maybe they are doing something strange. I will check.

>[...] 
> idemake.cfg contains this line:
> -Fu/home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2
> 
> The openglcontext.ppu exists in this directory:
>/home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2

Good.

> For cleanliness, I started over again by completely removing fpc, Lazarus,
> ~/.lazarus and did not use fpcupdelux this time.
> 
> Starting Lazarus for the first time gives this error which I am not
> concerned about:
>   The package EditorMacroScript (pascalscript macros) has detected a
>   problem and was deactivated. The package failed its selftest with the
>   message: "Failed getstr2 [Exp: "456" / Got: "abc"]"

Yes, that's normal. Some features are not yet supported on arm.

 
> package->install->lazopenglcontext->rebuild-ide gives this error:
>   lazarus.pp(1,1) Fatal: Cannot find lazopenglcontext used by Lazarus.
>   Check if package LazOpenGLContext creates lazopenglcontext.ppu, check
>   nothing deletes this file and check that no two packages have access to
>   the unit source..
> 
> no lazopenglcontext.ppu can be found in here:
>   /home/pi/.lazarus/units/arm-linux/gtk2

Good. That's the directory for the IDE itself.

 
> package->uninstall->lazopenglcontext->rebuild-ide is back to normal.
> 
> package->open-lpk->lazopenglcontext.lpk->compile builds ppu files in here:
>   /home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2

Good.

 
>   use->install->rebuild-now compiles then closes lazarus
>   start lazarus
>   compiles new program fine
>   lazopenglcontext appears in installed packages
> 
> Try compiling my program which includes:
>   openglcontext
> in the uses section, get this error:
>   vector.pas(14,5) Fatal: Cannot find openglcontext used by vector. Check
>   if package LazOpenGLContext creates openglcontext.ppu, check nothing
>   deletes this file and check that no two packages have access to the
>   unit source..
> 
> idemake.cfg contains this line:
> -Fu/home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2
> 
> The openglcontext.ppu exists in this directory:
>/home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2

Strange.

Mattias
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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-21 Thread R0b0t1 via Lazarus 
On Fri, Oct 20, 2017 at 9:03 PM, Anthony Walter via Lazarus
 wrote:
> I've done a bit of work on Pi and OpenGL and thought I'd give you some
> advice.
>
> 1) Pi only supports OpenGL ES contexts
>
> 2) Depending on your raspberry OS configuration, OpenGL ES might only be
> supported when X window manager is not running.
>
> 2a) Raspbian defaults to allow OpenGL in with X window manager running, but
> currently the actual driver does not function to the correct OpenGL ES
> specifications under that situation.
>
> For me personally, I configured Raspbian to use the correct OpenGL ES
> specifications, and that means the driver will fail to create a GL context
> if X windows is running. Don't ask me what the differences are, I really
> don't want to bother researching it, but there are problems. I've posted
> about it extensively on the Pi support forums and under Pi area of the new
> SDL forum.
>

Hello,

I am not very smart nor clever and I did not find this documentation.
Could you link to it? This is the best explanation for the weirdness I
was experiencing.

I read about the OpenGL ES hack to allow X11 compositing(?) but never
anything about configuration.

Respectfully,
 R0b0t1
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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-20 Thread Anthony Walter via Lazarus 
I've done a bit of work on Pi and OpenGL and thought I'd give you some
advice.

1) Pi only supports OpenGL ES contexts

2) Depending on your raspberry OS configuration, OpenGL ES might only be
supported when X window manager is not running.

2a) Raspbian defaults to allow OpenGL in with X window manager running, but
currently the actual driver does not function to the correct OpenGL ES
specifications under that situation.

For me personally, I configured Raspbian to use the correct OpenGL ES
specifications, and that means the driver will fail to create a GL context
if X windows is running. Don't ask me what the differences are, I really
don't want to bother researching it, but there are problems. I've posted
about it extensively on the Pi support forums and under Pi area of the new
SDL forum.
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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-20 Thread Anthony Tekatch via Lazarus 
On Fri, 20 Oct 2017 23:57:11 +0200, Mattias Gaertner via Lazarus 
 wrote:
> How did you install Lazarus?

I installed Raspbain as defined here:
  https://www.raspberrypi.org/downloads/raspbian/

Then installed Lazarus for Raspbian defined here:
  http://wiki.freepascal.org/Lazarus_on_Raspberry_Pi
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install fpc
sudo apt-get install lazarus

Then after getting lazopenglcontext failures, I tried fpcupdelux which
did not help.


> > Also, the .ppu is being generated when I try to install the
> > lazopenglcontext package:
> > 
> > $ ls -al ~/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2  
> 
> Good.
> Is this path in ~/.lazarus/idemake.cfg ?
> Note that the ~/ will be the real path in the cfg.

Yes, 

idemake.cfg contains this line:
-Fu/home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2

The openglcontext.ppu exists in this directory:
   /home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2


For cleanliness, I started over again by completely removing fpc, Lazarus,
~/.lazarus and did not use fpcupdelux this time.

Starting Lazarus for the first time gives this error which I am not
concerned about:
  The package EditorMacroScript (pascalscript macros) has detected a
  problem and was deactivated. The package failed its selftest with the
  message: "Failed getstr2 [Exp: "456" / Got: "abc"]"


package->install->lazopenglcontext->rebuild-ide gives this error:
  lazarus.pp(1,1) Fatal: Cannot find lazopenglcontext used by Lazarus.
  Check if package LazOpenGLContext creates lazopenglcontext.ppu, check
  nothing deletes this file and check that no two packages have access to
  the unit source..

no lazopenglcontext.ppu can be found in here:
  /home/pi/.lazarus/units/arm-linux/gtk2

package->uninstall->lazopenglcontext->rebuild-ide is back to normal.

package->open-lpk->lazopenglcontext.lpk->compile builds ppu files in here:
  /home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2

  use->install->rebuild-now compiles then closes lazarus
  start lazarus
  compiles new program fine
  lazopenglcontext appears in installed packages

Try compiling my program which includes:
  openglcontext
in the uses section, get this error:
  vector.pas(14,5) Fatal: Cannot find openglcontext used by vector. Check
  if package LazOpenGLContext creates openglcontext.ppu, check nothing
  deletes this file and check that no two packages have access to the
  unit source..

idemake.cfg contains this line:
-Fu/home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2

The openglcontext.ppu exists in this directory:
   /home/pi/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2


Thanks for any more clues,
Anthony
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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-20 Thread Mattias Gaertner via Lazarus 
On Fri, 20 Oct 2017 15:07:22 -0400
Anthony Tekatch via Lazarus  wrote:

>[..]
> $ ls -al /usr/lib/lazarus/1.6.2/components/opengl/

How did you install Lazarus?

> Also, the .ppu is being generated when I try to install the
> lazopenglcontext package:
> 
> $ ls -al ~/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2

Good.
Is this path in ~/.lazarus/idemake.cfg ?
Note that the ~/ will be the real path in the cfg.

Mattias
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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-20 Thread Anthony Tekatch via Lazarus 
On Fri, 20 Oct 2017 03:12:27 -0700 (MST), leledumbo via Lazarus 
 wrote:
> Should be in components folder.

On Fri, 20 Oct 2017 12:25:57 +0200, Mattias Gaertner via Lazarus 
 wrote:
> It is part of the Lazarus sources.
> lazarus/components/opengl/lazopenglcontext.lpk

Yes, the lazopenglcontext.lpk exists on the disk here:

$ ls -al /usr/lib/lazarus/1.6.2/components/opengl/
total 144
drwxr-xr-x  3 root root  4096 Oct 18 16:06 .
drwxr-xr-x 75 root root  4096 Oct 18 16:05 ..
drwxr-xr-x  2 root root  4096 Oct 18 16:05 example
-rw-r--r--  1 root root 10173 Aug 16  2015 glcarbonaglcontext.pas
-rw-r--r--  1 root root 15248 Nov 20  2015 glcocoanscontext.pas
-rw-r--r--  1 root root 30842 Sep 15  2015 glgtkglxcontext.pas
-rw-r--r--  1 root root  8168 Nov 21  2014 glqtcontext.pas
-rw-r--r--  1 root root 24564 Sep 27  2015 glwin32wglcontext.pas
-rw-r--r--  1 root root  2850 Apr  5  2017 lazopenglcontext.lpk
-rw-r--r--  1 root root   384 Aug 16  2015 lazopenglcontext.pas
-rw-r--r--  1 root root 20770 Sep 27  2015 openglcontext.pas
-rw-r--r--  1 root root  4200 Oct  5  2013 openglcontext.res


Also, the .ppu is being generated when I try to install the
lazopenglcontext package:

$ ls -al ~/.lazarus/lib/LazOpenGLContext/lib/arm-linux/gtk2
total 552
drwxr-xr-x 2 pi pi   4096 Oct 20 14:35 .
drwxr-xr-x 3 pi pi   4096 Oct 20 14:17 ..
-rw-r--r-- 1 pi pi 240648 Oct 20 14:17 glgtkglxcontext.o
-rw-r--r-- 1 pi pi  23005 Oct 20 14:17 glgtkglxcontext.ppu
-rw-r--r-- 1 pi pi523 Oct 20 14:35 LazOpenGLContext.compiled
-rw-r--r-- 1 pi pi   2808 Oct 20 14:35 lazopenglcontext.o
-rw-r--r-- 1 pi pi   1325 Oct 20 14:35 lazopenglcontext.ppu
-rw-r--r-- 1 pi pi 234308 Oct 20 14:17 openglcontext.o
-rw-r--r-- 1 pi pi  32001 Oct 20 14:17 openglcontext.ppu
-rw-r--r-- 1 pi pi   4200 Oct 20 14:17 openglcontext.res


The error remains the same:
  lazarus.pp(1,1) Fatal: Cannot find lazopenglcontext used by Lazarus.
  Check if package LazOpenGLContext creates lazopenglcontext.ppu, check
  nothing deletes this file and check that no two packages have access to
  the unit source..


Thanks for any more clues,
Anthony


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Re: [Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-20 Thread leledumbo via Lazarus 
> Is there a Raspberry Pi distribution that contains the lazopenglcontext 
package, or some method to get that package installed on the Raspberry Pi? 

Should be in components folder.



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[Lazarus] lazopenglcontext on Raspberry Pi?

2017-10-19 Thread Anthony Tekatch via Lazarus 
I cannot get the lazopenglcontext package to install on Raspbian stretch.
The error is:
  lazarus.pp(1,1) Fatal: Cannot find lazopenglcontext used by Lazarus.
  Check if package LazOpenGLContext creates lazopenglcontext.ppu, check
  nothing deletes this file and check that no two packages have access to
  the unit source..

Is there a Raspberry Pi distribution that contains the lazopenglcontext
package, or some method to get that package installed on the Raspberry Pi?

Thanks,
Anthony
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