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Roland Scheidegger 49ec647c3b llvmpipe: avoid most 64 bit math in rasterization 
The trick here is to recognize that in the c + n * dcdx calculations,
not only can the lower FIXED_ORDER bits not change (as the dcdx values
have those all zero) but that this means the sign bit of the calculations
cannot be different as well, that is
sign(c + n*dcdx) == sign((c >> FIXED_ORDER) + n*(dcdx >> FIXED_ORDER)).
That shaves off more than enough bits to never require 64bit masks.
A shifted plane c value could still easily exceed 32 bits, however since we
throw out planes which are trivial accept even before binning (and similarly
don't even get to see tris for which there was a trivial reject plane)) this
is never a problem.
The idea isnt't all that revolutionary, in fact something similar was tried
ages ago (9773722c2b) back when the values were
only 32 bit anyway. I believe now it didn't quite work then because the
adjustment needed for testing trivial reject / partial masks wasn't handled
correctly.
This still keeps the separate 32/64 bit paths for now, as the 32 bit one still
looks minimally simpler (and also because if we'd pass in dcdx/dcdy/eo unscaled
from setup which would be a good reason to ditch the 32 bit path, we'd need to
change the special-purpose rasterization functions for small tris).

This passes piglit triangle-rasterization (-fbo -auto -max_size
-subpixelbits 8) and triangle-rasterization-overdraw (with some hacks
to make it work correctly with large sizes) easily (full piglit as
well of course, but most tests wouldn't use triangles large enough to
be affected, that is tris with a bounding box over 128x128).
The profiler says indeed time spent in rast_tri functions is reduced
substantially, BUT of course only if the tris are large. I measured a 3%
improvement in mesa gloss demo when supersized to twice the screen size...

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
2016-01-13 03:50:57 +01:00
bin bugzilla_mesa.sh: sort the bugs list by number 2015-07-13 20:02:09 +01:00
docs mesa: docs: Add link to planet.freedesktop.org 2016-01-08 12:18:12 -08:00
doxygen doxygen: Remove doxygen_sqlite3.db with 'make clean' 2015-07-11 20:48:25 +01:00
include mesa: Add KBL PCI IDs and platform information. 2016-01-06 15:11:00 -08:00
m4 configure.ac: move AC_MSG_RESULT reporting back into the m4 macro 2015-03-24 20:49:32 +00:00
scons configure.ac: always define __STDC_CONSTANT_MACROS 2016-01-11 23:28:23 +02:00
src llvmpipe: avoid most 64 bit math in rasterization 2016-01-13 03:50:57 +01:00
.dir-locals.el dir-locals.el: Don't set variables for non-programming modes 2015-02-02 12:02:55 +00:00
.gitattributes Disable autocrlf for Visual Studio project files. 2008-02-28 12:34:01 +09:00
.gitignore mesa: add .mesa-install-links files to gitignore 2015-04-17 15:24:14 -04:00
.travis.yml travis: Add a test build with scons. 2015-12-01 15:09:56 -08:00
Android.common.mk android: Always define __STDC_LIMIT_MACROS. 2015-09-09 15:26:46 +01:00
Android.mk egl: android: remove DRM_GRALLOC_TOP hack 2015-07-22 16:35:27 +01:00
appveyor.yml appveyor: Cache winflexbison archive. 2015-12-08 22:49:38 +00:00
autogen.sh autogen.sh: pass --force to autoreconf, quote ORIGDIR 2015-03-11 23:28:26 +00:00
CleanSpec.mk android: Depend on gallium_dri from EGL, instead of linking in gallium. 2015-06-09 11:38:45 -07:00
common.py common.py: Fix PEP 8 issues. 2015-03-16 22:55:08 -07:00
configure.ac configure.ac: always define __STDC_CONSTANT_MACROS 2016-01-11 23:28:23 +02:00
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 install-lib-links: remove the .install-lib-links file 2015-02-24 15:33:25 +00:00
Makefile.am automake: use static llvm for make distcheck 2015-11-20 18:07:52 +00:00
SConstruct scons: Don't use bundled C99 headers for VS 2013. 2014-05-02 22:04:46 +01:00
VERSION docs: add 11.2.0-devel release notes template, bump version 2015-11-21 14:10:08 +00:00

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 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.