-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/19/2011 10:12 AM, Jose Fonseca wrote: > ----- Original Message ----- >> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 >> >> On 09/19/2011 07:20 AM, Brian Paul wrote: >>> On 09/19/2011 04:25 AM, Yuanhan Liu wrote: >>>> If I understand correctly, the new GL3 buffer object queries >>>> parameters, like BUFFER_MAP_ACCESS_FLAGS, depends on >>>> ARB_map_buffer_range extension. >>> >>> That would make sense, but in fact the extension spec >>> (http://www.opengl.org/registry/specs/ARB/map_buffer_range.txt) >>> >>> says nothing about these queries. They were added in GL 3.0. >> >> It seems like this could be an error in the extension spec. This >> is one of the extensions, like ARB_framebuffer_object, that "back >> ports" OpenGL 3.0 functionality to previous versions. These >> extensions are supposed to provide *identical* functionality to >> OpenGL 3.0. The other cases of mismatches have been determined >> to be bugs in the extension specs. > > FWIW, this ability would be useful for GL debuggers such as > apitrace. Otherwise the ARB_map_buffer_range extension is > unbalanced: it adds new state that can never be queried. > >> The question is, what do other implementations do? The other >> other question is, are there any implementations that support >> ARB_map_buffer_range but not OpenGL 3.0? > > Very good questions... > > The answer to the later question can be obtained by data mining > openbenchmarking.org, by entering this query on google: > > site:openbenchmarking.org GL_ARB_map_buffer_range glxinfo "OpenGL > version string: 2.1" -mesa > > and there are a few NVIDIA cards / driver combinations out there > that hit this: > > OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: > GeForce 7900 GT/GTO/PCI/SSE2 OpenGL version string: 2.1.2 NVIDIA > 260.19.36
Excellent! I have a couple Geforce7-class cards at home. Of course, I won't be home until next week... > OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: > Quadro FX 3450/4000 SDI/PCI/SSE2 OpenGL version string: 2.1.2 > NVIDIA 195.36.31 > > OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: > GeForce Go 7400/PCI/SSE2 OpenGL version string: 2.1.2 NVIDIA > 270.29 > > OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: > GeForce Go 7900 GS/PCI/SSE2 OpenGL version string: 2.1.2 NVIDIA > 260.19.06 > > OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: > GeForce 7600 GT/PCI/SSE2 OpenGL version string: 2.1.2 NVIDIA > 270.30 > > If anybody had one of these, we could tell for sure. > > Jose -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk53e9IACgkQX1gOwKyEAw/JWgCfUaiQSSylgVmhITCi+JmV9iNS lSAAoJOdBR+ni5H9e39C6+EdilAFtWUl =sMYG -----END PGP SIGNATURE----- _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
