sRGB framebuffers and context profiles

[Sven Panne]

The recent release of OpenGL 3.2 suggested the addition of another init
function:

   void glutInitContextProfile( int profile )

with the following bit masks for the currently defined profiles:

   #define GLUT_CORE_PROFILE 0x0001
   #define GLUT_COMPATIBILITY_PROFILE 0x0002

While I was at it, I implemented support for sRGB framebuffers, too: Just use
GLUT_SRGB with glutInitDisplayMode. Both additions have been mildly tested, so
some feedback would be nice. The documentation of the GLX/WGL extensions is a
real horror, incomplete and without any example code snippets, so a look at my
latest changes would be highly appreciated. I've seen very few examples out
there in the wild, and they differ wildly in their interpretation of the spec.
The ARB should really do a better job here, this is not the way to catch up
with DirectX...

One related question: Do I read

   http://www.opengl.org/registry/specs/ARB/color_buffer_float.txt

correctly and with ARB_color_buffer_float you can get floating point
framebuffers via WGL, but only floating point pbuffers (i.e. off-screen
buffers) via GLX? In other words: No floating point framebuffers via GLX? :-(

Cheers,
   S.


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[Fay, John F Dr CTR USAF AFMC 46 SK]

Let me bump this back into the "active" list.

John F. Fay
Technical Fellow
Jacobs Technology TEAS Group
850-883-1294

-----Original Message-----
From: Sven Panne [mailto:Sven.Panne@...]
Sent: Monday, August 10, 2009 1:54 PM
To: freeglut-developer@...
Subject: [Freeglut-developer] sRGB framebuffers and context profiles

The recent release of OpenGL 3.2 suggested the addition of another init
function:

   void glutInitContextProfile( int profile )

with the following bit masks for the currently defined profiles:

   #define GLUT_CORE_PROFILE 0x0001
   #define GLUT_COMPATIBILITY_PROFILE 0x0002

While I was at it, I implemented support for sRGB framebuffers, too:
Just use
GLUT_SRGB with glutInitDisplayMode. Both additions have been mildly
tested, so
some feedback would be nice. The documentation of the GLX/WGL extensions
is a
real horror, incomplete and without any example code snippets, so a look
at my
latest changes would be highly appreciated. I've seen very few examples
out
there in the wild, and they differ wildly in their interpretation of the
spec.
The ARB should really do a better job here, this is not the way to catch
up
with DirectX...

One related question: Do I read

   http://www.opengl.org/registry/specs/ARB/color_buffer_float.txt

correctly and with ARB_color_buffer_float you can get floating point
framebuffers via WGL, but only floating point pbuffers (i.e. off-screen
buffers) via GLX? In other words: No floating point framebuffers via
GLX? :-(

Cheers,
   S.


------------------------------------------------------------------------
------
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30-Day
trial. Simplify your report design, integration and deployment - and
focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
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