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Kenneth Graunke d86efc075e i965: Don't use texture swizzling to force alpha to 1.0 if unnecessary. 
Commit 33599433c7 began setting the texture swizzle mode to XYZ1 for
RED, RG, and RGB textures in order to force alpha to 1.0 in case we
actually stored the texture as RGBA.

This had a unforseen performance implication: the shader precompile
assumes that the texture swizzle mode will be XYZW for non-shadow
sampler types.  By setting it to XYZ1, this means every shader used with
a RED, RG, or RGB texture has to be recompiled.  This is a very common
case.

Unfortunately, there's no way to improve the precompile, since RGBA
textures still need XYZW, and there's no way to know by looking at
the shader source what texture formats might be used.

However, we only need to smash alpha to 1.0 if the texture's memory
format actually has alpha bits.  If not, the sampler already returns 1.0
for us without any special swizzling.  XRGB8888, for example, is a very
common case where this occurs.

This partially fixes a performance regression since commit 33599433c7.
More work is required to fully fix it in all cases.  This at least helps
Warsow.

NOTE: This is a candidate for the 9.1 branch.

Reviewed-by: Carl Worth <cworth@cworth.org>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
2013-03-20 10:37:34 -07:00
bin mesa: Modify candidate search string 2013-03-05 14:54:11 -08:00
docs docs: import release notes for 9.1.1, add news item 2013-03-19 17:46:30 -07:00
doxygen glsl/build: Build glcpp via the glsl Makefile 2013-01-22 14:33:20 -08:00
include Add dri image entry point for creating image from fd 2013-03-18 21:03:54 -04:00
m4 build: Use AX_PROG_FLEX 2013-01-22 14:33:38 -08:00
scons scons: Warn when using MSVS versions prior to 2012. 2013-03-15 19:55:54 +00:00
src i965: Don't use texture swizzling to force alpha to 1.0 if unnecessary. 2013-03-20 10:37:34 -07:00
.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 android: Define Make variables for Android version 2013-01-02 14:51:18 -08:00
Android.mk android: Define Make variables for Android version 2013-01-02 14:51:18 -08:00
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 build: Enable x86 assembler on Hurd. 2013-03-19 18:12:38 +01:00
Makefile.am mesa: bump version to 9.2 (devel) 2013-01-31 09:01:15 +01:00
SConstruct scons: Define PACKAGE_VERSION/BUGREPORT globally. 2013-03-13 13:13:37 +00:00

docs/README.WIN32 

File: docs/README.WIN32

Last updated: 23 April 2011


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.


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.