On Mon, 20 Sep 2010 07:14:09 -0700, Ian Romanick <i...@freedesktop.org> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Eric Anholt wrote: > > On our way to OpenGL 3.0, it would be nice to clean out some of the > > optional deprecated features that Mesa supports. The ARB_imaging subset > > is the highest on my list -- it significantly clutters up the pixel > > path, and has always been optional even though the specification text > > got rolled into OpenGL 1.2. ATI's proprietary driver never supported > > the imaging subset, and what I've read of NVIDIA's implementation > > online, its presence is a user trap. Keeping an implementation of it is > > not helping our users from a performance or portability perspective. > > > > I've pushed a branch to my repo removing most of SGI_color_matrix, > > SGI_color_table, EXT_histogram, and EXT_convolution. Here's the > > diffstat: > > [snip] > > > That's 2.7% of mesa/main/, and driver size dropped correspondingly. > > Note that we don't get to completely drop histogram.c and convolve.c, as > > we're supposed to have the entrypoints and just emit INVALID_OPERATION > > for the missing extensions even if the ARB_imaging subset isn't present. > > > > If we don't have any strong justification for keeping this code, I'd > > like to merge this to master. > > I will probably push a similar branch this week that removes other > extensions discussed at XDS. See "kill it with fire" at the bottom of > http://www.x.org/wiki/Events/XDS2010/Program. It looks like the biggest > savings will come from removing GL_EXT_paletted_texture and > GL_EXT_shared_texture_palette.
I was concerned about the texture palette ones since several apps show an interest in them, but now that I go back and look at the docs we couldn't support these in our hardware, since 915 and 965 have a single shared texture palette (or for g45+, two), and GL_EXT_shared_texture_palette is an extension to the general extension to use a shared texture palette optionally, rather than an alternative that matches our hardware support. I can't even find palette support in r5xx or r6xx. Presumably people would just do this with dependent texture lookups at this point.
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