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Message-ID:	<1111477463.423fccd741621@webmail.stanford.edu>
Date:	Mon, 21 Mar 2005 23:44:23 -0800
From:	Ajay Jayant Joshi <joshi83 AT stanford DOT edu>
To:	cygwin AT cygwin DOT com
Subject:	Cygwin and ARB shader
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X-Authenticated-User:	joshi83

Hi

Is it possible to use ARB extensions (shaders) under cygwin?
I am not able to use glGenProgramsARB_t()
---------------------------------------------------------------
// Generate a valid program ID
// m_program_id => GLuint m_program_id ;
glGenProgramsARB_t(1, &m_program_id);
assert(m_program_id);
// typedef void (APIENTRY * glGenProgramsARB_t) (GLsizein, GLuint*);
---------------------------------------------------------------

This assertion fails. I am using same code under Linux and it works fine.

Under Linux I am using:
-- ATI FireGL (256MB) card
-- fglrx drivers
-- ARB vertex and fragment shaders

I am using same card and same shaders on windows (cygwin). And have
installed latest Fire X series drivers for XP from ATI. Do i need to
install any drivers in cygwin?
( i am using "/lib/w32api/libopengl32.a" as libGL.a (sym link) )


glxinfo on Linux shows :
Direct Rendering : YES
OpenGL Drivers: ATI

glxinfo on Windows (Cygwin) shows:
Direct Rendering : NO
OpenGL Drivers: MESA

Can that be a problem? (When latest drivers were not installed on Linux i
got exactly same assertion failure and when i used new drivers everything
was ok.)

How do we make cygwin aware of underlying ATI card?
Is direct rendering equivalent to using vertext/fragment shaders ?
(i.e. do I need direct rendering=YES for using ARB shaders ? )

Thanks a lot for your time,

Regards
Ajay Joshi



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