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Paul Berry 6a022c8b03 glsl: Fix lowering of direct assignment in lower_clip_distance. 
In commit 065da16 (glsl: Convert lower_clip_distance_visitor to be an
ir_rvalue_visitor), we failed to notice that since
lower_clip_distance_visitor overrides visit_leave(ir_assignment *),
ir_rvalue_visitor::visit_leave(ir_assignment *) wasn't getting called.
As a result, clip distance dereferences appearing directly on the
right hand side of an assignment (not in a subexpression) weren't
getting properly lowered.  This caused an ir_dereference_variable node
to be left in the IR that referred to the old gl_ClipDistance
variable.  However, since the lowering pass replaces gl_ClipDistance
with gl_ClipDistanceMESA, this turned into a dangling pointer when the
IR got reparented.

Prior to the introduction of geometry shaders, this bug was unlikely
to arise, because (a) reading from gl_ClipDistance[i] in the fragment
shader was rare, and (b) when it happened, it was likely that it would
either appear in a subexpression, or be hoisted into a subexpression
by tree grafting.

However, in a geometry shader, we're likely to see a statement like
this, which would trigger the bug:

    gl_ClipDistance[i] = gl_in[j].gl_ClipDistance[i];

This patch causes
lower_clip_distance_visitor::visit_leave(ir_assignment *) to call the
base class visitor, so that the right hand side of the assignment is
properly lowered.

Fixes piglit test:
- spec/glsl-1.50/execution/geometry/clip-distance-itemized-copy

Cc: Ian Romanick <idr@freedesktop.org>
Cc: "9.2" <mesa-stable@lists.freedesktop.org>
Cc: "10.0" <mesa-stable@lists.freedesktop.org>

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
(cherry picked from commit 9dfcb05fa6)
2013-11-26 16:39:13 -08:00
bin get-pick-list.sh: Onlly show commits specifically tagged for 9.2. 2013-11-12 16:45:59 -08:00
docs docs: Add MD5 sums for the 9.2.3 release 2013-11-13 07:13:21 -08:00
doxygen glsl/build: Build glcpp via the glsl Makefile 2013-01-22 14:33:20 -08:00
include mesa: fixes for MSVC 2013 2013-10-25 17:18:37 -07:00
m4 ax_prog_flex.m4: change grep syntax to accept e.g. flex.real 2013-07-18 13:54:59 -07:00
scons scons: Fix implicit python dependency discovery on Windows. 2013-06-08 08:55:06 +01:00
src glsl: Fix lowering of direct assignment in lower_clip_distance. 2013-11-26 16:39:13 -08:00
.dir-locals.el Add emacs setup for the docs/devinfo.html comment wrapping recommendation. 2012-07-11 09:20:21 -07:00
.gitattributes Disable autocrlf for Visual Studio project files. 2008-02-28 12:34:01 +09:00
.gitignore Clean up .gitignore files 2013-01-10 22:01:31 +01:00
Android.common.mk Bump version to 9.2.3 2013-11-13 07:04:01 -08:00
Android.mk android: add ilo to the build system 2013-05-06 07:20:07 -07:00
autogen.sh build: Fix autogen.sh to allow out-of-tree builds 2012-08-14 10:54:39 -07:00
common.py scons: Allows choosing VS 10 or 11. 2013-03-12 22:04:04 +00:00
configure.ac Bump version to 9.2.3 2013-11-13 07:04:01 -08:00
Makefile.am Add bin/test-driver to the list of files to be distributed. 2013-10-18 16:58:32 -07:00
SConstruct Bump version to 9.2.3 2013-11-13 07:04:01 -08:00

docs/README.WIN32 

File: docs/README.WIN32

Last updated: 21 June 2013


Quick Start
----- -----

Windows drivers are build with SCons.  Makefiles or Visual Studio projects are
no longer shipped or supported.

Run

  scons osmesa mesagdi

to build classic mesa Windows GDI drivers; or

  scons libgl-gdi

to build gallium based GDI driver.

This will work both with MSVS or Mingw.


Windows Drivers
------- -------

At this time, only the gallium GDI driver is known to work.

Source code also exists in the tree for other drivers in
src/mesa/drivers/windows, but the status of this code is unknown.

Recipe
------

Building on windows requires several open-source packages. These are
steps that work as of this writing.

1) install python 2.7
2) install scons (latest)
3) install mingw, flex, and bison
4) install libxml2 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs
  get libxml2-python-2.9.1.win-amd64-py2.7.exe
5) install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs
  get pywin32-218.4.win-amd64-py2.7.exe
6) install git
7) download mesa from git
  see http://www.mesa3d.org/repository.html
8) run scons

General
-------

After building, you can copy the above DLL files to a place in your
PATH such as $SystemRoot/SYSTEM32.  If you don't like putting things
in a system directory, place them in the same directory as the
executable(s).  Be careful about accidentially overwriting files of
the same name in the SYSTEM32 directory.

The DLL files are built so that the external entry points use the
stdcall calling convention.

Static LIB files are not built.  The LIB files that are built with are
the linker import files associated with the DLL files.

The si-glu sources are used to build the GLU libs.  This was done
mainly to get the better tessellator code.

If you have a Windows-related build problem or question, please post
to the mesa-dev or mesa-users list.