Cylinder wrap mode works with perspective interpolation now.

This reverts commit 444cd62ca3.

If the texture priority field is 0.125 set the PROG_PARAM_BIT_CYL_WRAP
flag.  The gallium state tracker will look for this flag.

This feature is only for testing purposes and may be remove at some
point.  But if it's useful we could write a GL/Mesa extension to
expose it properly.

Allows one to declare fragment shader inputs with cylindrical wrap info.

Little utility after development stabilisation, use tgsi_dump instead.

This object can be shared with another context, so we cannot just
delete it when the owning context is being destroyed.

Ensuring that buffer objects are properly refcounted guarantees
NullBufferObj is destroyed when all references to it are removed.

Lets see if this is not too pedantic. Obj pointers are never exposed to
GL apps so it should be possible to get this right.

Furthermore apps with GL widgets and test suits create and destroy many
contexts and objects, so bad reference counting is not really an option.

Always use _mesa_reference_buffer_object, and never call
ctx->Driver.DeleteBuffer() directly to prevent dangling pointers to the
null buffer object.

This fixes crash/assertions in sharedtex_mt and Autodesk Mudbox.

with mutable vars we don't need to follow the phi nodes. meaning that
control flow becomes trivial as we don't have scan the rest of the tgsi
to figure out the variable usage anymore. futhermore the memory2register
pass promotes alloca/store/load to registers while inserting the right phi
nodes. so we get simplicity and performance.

After that commit, some dri2 protocol symbols were being checked from
places that weren't including dri2proto.h, effectively disabling some
valuable SwapBuffers codepaths.

the llvmpipe tgsi translation is a lot more complete than what was in
gallivm so replacing the latter with the former. this is needed since
the draw llvm paths will use the same code. effectively the proven
llvmpipe code becomes gallivm.

Pedantic Corbin is pedantic.

Prevents a segfault on e.g. r600.

also update the cell config a bit

Signed-off-by: Brian Paul <brianp@vmware.com>

Squashed commit of the following:

commit 009598122a
Author: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date:   Mon Feb 8 11:03:26 2010 +0000

    nouveau: fix gallium-screen-context branch fallout

commit 7b2ffc2019
Merge: 51e190e c036d13
Author: Keith Whitwell <keithw@vmware.com>
Date:   Fri Feb 5 09:55:02 2010 +0000

    Merge commit 'origin/master' into gallium-screen-context

    Conflicts:
    	src/gallium/winsys/drm/nouveau/drm/nouveau_drm_api.c

    This branch has got a pretty tortured history now, I expect
    a squash merge will be appropriate when it is done.

commit 51e190e95a
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 17:58:02 2010 +0000

    gallium: fix some build issues

commit f524bdaa72
Merge: f906212 3aba0a2
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 17:51:32 2010 +0000

    Merge commit 'origin/master' into gallium-screen-context

commit f906212688
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 17:17:12 2010 +0000

    gallium/docs: small description of screen::create_context

commit efcb37bd3d
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:42:42 2010 +0000

    drm/radeon: more dead create_context wrapper removal

commit 6badc0dd9e
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:42:30 2010 +0000

    drm/i965: more dead create_context wrapper removal

commit cf04ebd5a5
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:42:05 2010 +0000

    st/python: more dead create_context wrapper removal

commit 444f114c35
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:37:58 2010 +0000

    idenity: wrapped context creation

commit 5a6d09cb9e
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:28:47 2010 +0000

    ws/gdi: remove dead context_create wrapper

commit 132b55f4be
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:27:52 2010 +0000

    ws/gdi: remove dead context_create wrapper

commit 56d2d21a0c
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:25:38 2010 +0000

    st/xorg: use screen::context_create

commit 838c5cfe56
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:23:20 2010 +0000

    glx/xlib: simplify creation of trace-wrapped contexts

    Trace screen knows how to properly wrap context creation in the
    wrapped screen, so nothing special to do here.

commit c99404c03e
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:18:24 2010 +0000

    st/python: no need to special case context creation for trace

commit 193a527a68
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:15:30 2010 +0000

    drm/radeon: remove dead create_context declaration

commit bb984eecc2
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:14:58 2010 +0000

    nv/drm: remove dead create_context ref

commit e809313a44
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:12:51 2010 +0000

    st/egl: remove a layer of wrappers around screen::create_context

commit 39caa6672a
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:05:28 2010 +0000

    r300g: fill in screen::context_create

commit 407f12556d
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 16:04:04 2010 +0000

    cell: adapt for screen::create_context, untested

commit d02b0c6ce3
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:50:24 2010 +0000

    drm/nv: adapt for screen::create_context

    All contexts now created directly through the screen, so remove
    equivalent code here.

    Remove apparently un-needed array of contexts in the winsys.

commit 53eec5b134
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:50:08 2010 +0000

    stw: adapt for screen::create_context, untested

commit c6a64de3eb
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:49:20 2010 +0000

    trace: expose the wrapped context's priv data

    If we are going to keep this priv idea, really want an accessor
    function for it so that trace and other drivers can wrap that.

commit 75d6104e11
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:47:55 2010 +0000

    nv30: adapt to screen::context_create

commit 12f5deb6ed
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:44:47 2010 +0000

    nv40: adapt to screen::context_create

commit 14baccaa3b
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:35:27 2010 +0000

    nv50: adapt to screen::create_context

    Not build tested.  Need to figure out how to build nouveau.

commit a0e94505cc
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:22:27 2010 +0000

    llvmpipe: update for screen::create_context, untested

commit 0eae17107c
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 15:16:57 2010 +0000

    xlib/llvmpipe: remove dead winsys context creation path

commit 2f69f9ffaa
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 14:58:27 2010 +0000

    gallium: convert most code to use screen::create_context

    I wish I could build all of gallium at once to find breakages.

commit d7b57f4061
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 12:46:21 2010 +0000

    glx: permit building with older protocol headers

    I'd like to be able to build mesa on current distro releases without
    having to upgrade from the standard dri2proto and glproto headers.  With
    this change I'm able to build on ancient releases such as Ubuntu 9-10...

    In general, it would be nice to be able to build-test mesa to check for
    unintended breakages without having to follow the external dependencies
    of every group working on the codebase.

commit 57adedd6fb
Merge: da71847 e1906ae
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Feb 4 11:38:15 2010 +0000

    Merge commit 'origin/master' into gallium-screen-context

    Conflicts:
    	src/gallium/drivers/softpipe/sp_video_context.h
    	src/gallium/drivers/trace/tr_context.c
    	src/gallium/state_trackers/wgl/shared/stw_context.c
    	src/gallium/winsys/gdi/gdi_softpipe_winsys.c

commit da71847ea6
Author: José Fonseca <jfonseca@vmware.com>
Date:   Sat May 2 08:57:39 2009 +0100

    wgl: Use pipe_screen::context_create.

commit 2595a188f9
Author: José Fonseca <jfonseca@vmware.com>
Date:   Sat May 2 08:56:47 2009 +0100

    trace: Implement pipe_screen::context_create.

commit f3640e4ae3
Author: José Fonseca <jfonseca@vmware.com>
Date:   Sat May 2 08:56:17 2009 +0100

    softpipe: Implement pipe_screen::context_create.

commit 347266bddc
Author: José Fonseca <jfonseca@vmware.com>
Date:   Sat May 2 08:55:31 2009 +0100

    gallium: New pipe_screen::context_create callback.

I'd like to be able to build mesa on current distro releases without
having to upgrade from the standard dri2proto and glproto headers.  With
this change I'm able to build on ancient releases such as Ubuntu 9-10...

In general, it would be nice to be able to build-test mesa to check for
unintended breakages without having to follow the external dependencies
of every group working on the codebase.

Seems to introduce no changes to the build of libglapi.a when tested against
new versions of the headers.

UMS doesn't need the STP atom.

Signed-off-by: Dave Airlie <airlied@redhat.com>