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| author |   Trevor Woerner <twoerner@gmail.com> | 2017-06-11 15:43:50 -0400 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2017-06-12 15:04:12 +0100 |
| commit | 6fd63e24a1c6ac901edb393c9db8e245189a83e2 (patch) | |
| tree | 34546a50431f0196926c97a04ebb9c7173ece4b1 /meta/recipes-graphics/mesa/files | |
| parent | 13024ce5aae453769b546d5fbe533443aec3d6fd (diff) | |
| download | openembedded-core-contrib-6fd63e24a1c6ac901edb393c9db8e245189a83e2.tar.gz | |
mesa.inc: enable texture float for gallium
Following the lead from Fedora (as suggested by Rob Clark) always enable
--enable-texture-float for all gallium drivers, but then modify the code to
not enable it, at runtime, where the implementation isn't backed by hardware.
The patch comes from unpacking fedora-25's mesa-17.0.5-3.fc25.src.rpm from
https://dl.fedoraproject.org/pub/fedora/linux/updates/25/SRPMS/m/
Somewhere along the path from OpenGL ES 2.0 to OpenGL ES 3.0 are some
algorithms that are encumbered by patents. These algorithms are enabled
with mesa's --enable-texture-float configure flag. However, if hardware
acceleration is being used and the hardware supports --enable-texture-float,
it means the hardware vendor has paid for the patents.
Note that with this solution, non-hardware gallium drivers (e.g. swrast) can't
--enable-texture-float, which might cause issues with some piglit tests.
This solution was discussed and agreed-to on the mailing list:
http://lists.openembedded.org/pipermail/openembedded-core/2017-May/137233.html
Signed-off-by: Trevor Woerner <twoerner@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-graphics/mesa/files')
| -rw-r--r-- | meta/recipes-graphics/mesa/files/0002-hardware-gloat.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/meta/recipes-graphics/mesa/files/0002-hardware-gloat.patch b/meta/recipes-graphics/mesa/files/0002-hardware-gloat.patch new file mode 100644 index 0000000000..0e014dcc80 --- /dev/null +++ b/meta/recipes-graphics/mesa/files/0002-hardware-gloat.patch @@ -0,0 +1,51 @@ +From 00bcd599310dc7fce4fe336ffd85902429051a0c Mon Sep 17 00:00:00 2001 +From: Igor Gnatenko <i.gnatenko.brain@gmail.com> +Date: Sun, 20 Mar 2016 13:27:04 +0100 +Subject: [PATCH 2/4] hardware gloat + +Upstream-Status: Inappropriate [not author] +Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com> +--- + src/gallium/drivers/llvmpipe/lp_screen.c | 7 +++++++ + src/gallium/drivers/softpipe/sp_screen.c | 7 +++++++ + 2 files changed, 14 insertions(+) + +diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c +index 4f61de8..3b0ec77 100644 +--- a/src/gallium/drivers/llvmpipe/lp_screen.c ++++ b/src/gallium/drivers/llvmpipe/lp_screen.c +@@ -411,6 +411,13 @@ llvmpipe_is_format_supported( struct pipe_screen *_screen, + if (!format_desc) + return FALSE; + ++ if ((bind & PIPE_BIND_RENDER_TARGET) && ++ format != PIPE_FORMAT_R9G9B9E5_FLOAT && ++ format != PIPE_FORMAT_R11G11B10_FLOAT && ++ util_format_is_float(format)) { ++ return FALSE; ++ } ++ + assert(target == PIPE_BUFFER || + target == PIPE_TEXTURE_1D || + target == PIPE_TEXTURE_1D_ARRAY || +diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c +index 031602b..c279120 100644 +--- a/src/gallium/drivers/softpipe/sp_screen.c ++++ b/src/gallium/drivers/softpipe/sp_screen.c +@@ -358,6 +358,13 @@ softpipe_is_format_supported( struct pipe_screen *screen, + if (!format_desc) + return FALSE; + ++ if ((bind & PIPE_BIND_RENDER_TARGET) && ++ format != PIPE_FORMAT_R9G9B9E5_FLOAT && ++ format != PIPE_FORMAT_R11G11B10_FLOAT && ++ util_format_is_float(format)) { ++ return FALSE; ++ } ++ + if (sample_count > 1) + return FALSE; + +-- +2.7.4 + |