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Kenneth Graunke 26ee6f23a9 mesa: Delete VAO _MaxElement code and index buffer bounds checking.
Fredrik's implementation of ARB_vertex_attrib_binding introduced new
gl_vertex_attrib_array and gl_vertex_buffer_binding structures, and
converted Mesa's older gl_client_array to be derived state.  Ultimately,
we'd like to drop gl_client_array and use those structures directly.

One hitch is that gl_client_array::_MaxElement doesn't correspond to
either structure (unlike every other field), so we'd have to figure out
where to store it.  The _MaxElement computation uses values from both
structures, so it doesn't really belong in either place.  We could put
it in the VAO, but we'd have to pass it around everywhere.

It turns out that it's only used when ctx->Const.CheckArrayBounds is
set, which is only set by the (rarely used) classic swrast driver.
It appears that drivers/x11 used to set it as well, which was intended
to avoid segmentation faults on out-of-bounds memory access in the X
server (probably for indirect GLX clients).  However, ajax deleted that
code in 2010 (commit 1ccef926be).

The bounds checking apparently doesn't actually work, either.  Non-VBO
attributes arbitrarily set _MaxElement to 2 * 1000 * 1000 * 1000.
vbo_save_draw and vbo_exec_draw remark /* ??? */ when setting it, and
the i965 code contains a comment noting that _MaxElement is often bogus.

Given that the code is complex, rarely used, and dubiously functional,
it doesn't seem worth maintaining going forward.  This patch drops it.

This will probably mean the classic swrast driver may begin crashing on
out of bounds vertex buffer access in some cases, but I believe that is
allowed by OpenGL (and probably happened for non-VBO accesses anyway).
There do not appear to be any Piglit regressions, either.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Roland Scheidegger <sroland@vmware.com>
2014-09-19 00:43:01 -07:00
bin get-pick-list: Allow for non-whitespace between "CC:" and "mesa-stable" 2013-07-31 15:49:48 -07:00
docs nv50,nvc0: enable ARB_texture_view 2014-09-12 00:57:45 -04:00
doxygen mesa: remove empty glthread.h file 2014-03-03 13:08:59 -07:00
include include/haiku: fix comment typo 2014-08-28 21:41:29 -04:00
m4 mapi/glapi: Use ElementTree instead of libxml2. 2014-03-26 13:51:32 +00:00
scons scons: add /dynamicbase and /nxcompat to MinGW linkflags 2014-09-11 11:59:28 +01:00
src mesa: Delete VAO _MaxElement code and index buffer bounds checking. 2014-09-19 00:43:01 -07:00
.dir-locals.el dir-locals.el: Set indent-tabs-mode true for makefile-mode 2014-01-29 11:45:49 -08:00
.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 build: unify mesa version by using a VERSION file 2013-07-29 13:39:29 -07:00
Android.mk android: dri: use the installed libdrm headers 2014-08-13 00:46:56 +01:00
autogen.sh build: Fix autogen.sh to allow out-of-tree builds 2012-08-14 10:54:39 -07:00
CleanSpec.mk android: add CleanSpec.mk 2014-08-13 00:46:57 +01:00
common.py scons: Don't restrict MSVC_VERSION values. 2014-05-02 22:04:46 +01:00
configure.ac configure.ac: unbreak the build with non gnu grep 2014-09-10 08:35:11 -07:00
install-gallium-links.mk targets/radeonsi/vdpau: convert to static/shared pipe-drivers 2014-06-22 23:06:01 +01:00
install-lib-links.mk build: Let install-lib-links.mk handle .la files in subdirectories. 2014-08-18 18:22:40 -07:00
Makefile.am build: Rename md5 to checksums as part of .PHONY target 2014-09-03 16:08:20 -07:00
SConstruct scons: Don't use bundled C99 headers for VS 2013. 2014-05-02 22:04:46 +01:00
VERSION Increment version to 10.4.0-devel 2014-08-21 08:38:24 -07:00

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.

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