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d54bc7e01f
Before 4.5, GL_BACK was not allowed as a value of bufs. Since 4.5 it
is allowed under some circumstances:
From the OpenGL 4.5 specification, Section 17.4.1 "Selecting Buffers
for Writing", page 493 (page 515 of the PDF):
"An INVALID_ENUM error is generated if any value in bufs is FRONT,
LEFT, RIGHT, or FRONT_AND_BACK . This restriction applies to both
the de- fault framebuffer and framebuffer objects, and exists
because these constants may themselves refer to multiple buffers, as
shown in table 17.4."
And on page 492 (page 514 of the PDF):
"If the default framebuffer is affected, then each of the constants
must be one of the values listed in table 17.6 or the special value
BACK . When BACK is used, n must be 1 and color values are written
into the left buffer for single-buffered contexts, or into the back
left buffer for double-buffered contexts."
This patch keeps the same behaviour if OpenGL version is < 4. We
assume that for 4.x this is the intended behaviour, so a fix, but for
3.x the intended behaviour is the already in place.
Part of the fix for:
GL45-CTS.direct_state_access.framebuffers_draw_read_buffers_errors
v2: remove forgot printf
v3: remove spaces before commas on spec quote, split line too
long (Anuj)
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
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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.