Re: [Flightgear-devel] RTT issue with ATI cards (3d clouds)

2006-08-20 Thread Mathias Fröhlich
On Saturday 19 August 2006 20:28, Frederic Bouvier wrote:
 Mathias Fröhlich a écrit :
  - support me with switching to osg, they already have that including much
  more ...

 How could we do that ? Can you share what you already done ?
I am out until at least next sunday evening. Past that more about that.

  Greetings

 Mathias

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Re: [Flightgear-devel] RTT issue with ATI cards (3d clouds)

2006-08-20 Thread Mathias Fröhlich
On Saturday 19 August 2006 17:02, Christopher HORLER wrote:
  No, he is not wrong.
  You should not look into the server extensions nor into the client
  extensions. The only valid thing is (well, I had to learn that the hard
  way
 
  :) GLX extensions that is in effect what the client *and* the server
 
  understands. Here you don't have what you need for rendertexture.
 
  I suffer from the same problem.

 Apologies
Not a problem!

 Greetings
  Mathias

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Re: [Flightgear-devel] RTT issue with ATI cards (3d clouds)

2006-08-19 Thread Christopher HORLER
On Saturday 19 August 2006 00:19, Jocelyn Couetdic wrote:
 I did some quick and dirty debugging in the RenderTexture class (using
 the TestRenderTexture program), and find out, that the reason it doesn't
 work, is that neither GLX_SGIX_fbconfig, or GLX_SGIX_pbuffer extensions
 are supported by the ATI GLX implementation :
You're wrong (last entry below)
fglrxinfo -x
cut for clarity
glx server extensions:
GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating,
GLX_EXT_import_context, GLX_OML_swap_method, GLX_SGI_make_current_read,
GLX_SGIS_multisample, GLX_SGIX_hyperpipe, GLX_SGIX_swap_barrier,
GLX_SGIX_fbconfig

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Re: [Flightgear-devel] RTT issue with ATI cards (3d clouds)

2006-08-19 Thread Mathias Fröhlich
On Saturday 19 August 2006 16:27, Christopher HORLER wrote:
 On Saturday 19 August 2006 00:19, Jocelyn Couetdic wrote:
  I did some quick and dirty debugging in the RenderTexture class (using
  the TestRenderTexture program), and find out, that the reason it doesn't
  work, is that neither GLX_SGIX_fbconfig, or GLX_SGIX_pbuffer extensions
  are supported by the ATI GLX implementation :

 You're wrong (last entry below)
 fglrxinfo -x
 cut for clarity
 glx server extensions:
 GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating,
 GLX_EXT_import_context, GLX_OML_swap_method, GLX_SGI_make_current_read,
 GLX_SGIS_multisample, GLX_SGIX_hyperpipe, GLX_SGIX_swap_barrier,
 GLX_SGIX_fbconfig
No, he is not wrong.
You should not look into the server extensions nor into the client extensions. 
The only valid thing is (well, I had to learn that the hard way :)
GLX extensions that is in effect what the client *and* the server understands.
Here you don't have what you need for rendertexture.

I suffer from the same problem.

And I can see two ways to go: Either
- implement FBO's in rendertexture, or
- support me with switching to osg, they already have that including much 
more ...

   Greetings

  Mathias

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Re: [Flightgear-devel] RTT issue with ATI cards (3d clouds)

2006-08-19 Thread Christopher HORLER
On Saturday 19 August 2006 00:19, Jocelyn Couetdic wrote:
 - Or should the 3d clouds code be written to use the FramebufferObject,
 which seems to be (from what I could gather on the net) a replacement
 for older off-screen rendering and Rendering To Texture using pbuffers
 extensions.
 BTW, this GL_EXT_framebuffer_object is supported by the ATI drivers.
Probably - if it's found to be well supported.

My understanding was that it was an attempt at harmonisation of all the 
existing Pbuffer type objects.  However, it doesn't appear to be an ARB 
extension yet.

Regards,

Chris

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[Flightgear-devel] RTT issue with ATI cards (3d clouds)

2006-08-18 Thread Jocelyn Couetdic
Hi, I hope I'm posting to the right ml.
I tried to find out what was wrong with ATI cards, and the 3d clouds
code. For information, my system is a laptop with an ATI Mobility X700
graphics card. I run a debian testing, with a 2.6.16 home build
kernel, and I use the ATI proprietary driver (fglrx) version 8.27.10. I
also have a winXP, with which 3d clouds work well. I use flightgear
0.9.10

I did some quick and dirty debugging in the RenderTexture class (using
the TestRenderTexture program), and find out, that the reason it doesn't
work, is that neither GLX_SGIX_fbconfig, or GLX_SGIX_pbuffer extensions
are supported by the ATI GLX implementation :
$ glxinfo
name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
GLX_EXT_import_context, GLX_OML_swap_method,
GLX_SGI_make_current_read, 
GLX_SGIS_multisample, GLX_SGIX_hyperpipe, GLX_SGIX_swap_barrier, 
GLX_SGIX_fbconfig
client glx vendor string: ATI
client glx version string: 1.3
client glx extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context, 
GLX_ARB_get_proc_address, GLX_ARB_multisample,
GLX_ATI_pixel_format_float, 
GLX_ATI_render_texture
GLX version: 1.2
GLX extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context, 
GLX_ARB_multisample
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: MOBILITY RADEON X700 Generic
OpenGL version string: 2.0.5946 (8.27.10)
OpenGL extensions:
[snip]

This causes the initialize method of a RenderTexture object to fail
quite early on (in _VerifyExtensions()). As a result, the bbcache code
returns this during init :
bbcache:Initialize failed, RTT not available for 3D clouds

So here are a few questions :
- I am totally off ? (I have absolutely no background in OpenGl
whatsoever). Is there somebody using those ATI driver, who can confirm
that those two extensions are not there ? (and that it's not some @#!%
driver installation bug on my system)

- If this is indeed the problem, should someone file a ticket to ATI to
ask for support of those extensions in coming releases of the drivers ?

- Or should the 3d clouds code be written to use the FramebufferObject,
which seems to be (from what I could gather on the net) a replacement
for older off-screen rendering and Rendering To Texture using pbuffers
extensions.
BTW, this GL_EXT_framebuffer_object is supported by the ATI drivers.

Regards,

-- 
Jocelyn Couetdic [EMAIL PROTECTED]


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