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545f976943
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 (From OE-Core rev: 6fd63e24a1c6ac901edb393c9db8e245189a83e2) Signed-off-by: Trevor Woerner <twoerner@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
52 lines
1.7 KiB
Diff
52 lines
1.7 KiB
Diff
From 00bcd599310dc7fce4fe336ffd85902429051a0c Mon Sep 17 00:00:00 2001
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From: Igor Gnatenko <i.gnatenko.brain@gmail.com>
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Date: Sun, 20 Mar 2016 13:27:04 +0100
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Subject: [PATCH 2/4] hardware gloat
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Upstream-Status: Inappropriate [not author]
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Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
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---
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src/gallium/drivers/llvmpipe/lp_screen.c | 7 +++++++
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src/gallium/drivers/softpipe/sp_screen.c | 7 +++++++
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2 files changed, 14 insertions(+)
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diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
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index 4f61de8..3b0ec77 100644
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--- a/src/gallium/drivers/llvmpipe/lp_screen.c
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+++ b/src/gallium/drivers/llvmpipe/lp_screen.c
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@@ -411,6 +411,13 @@ llvmpipe_is_format_supported( struct pipe_screen *_screen,
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if (!format_desc)
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return FALSE;
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+ if ((bind & PIPE_BIND_RENDER_TARGET) &&
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+ format != PIPE_FORMAT_R9G9B9E5_FLOAT &&
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+ format != PIPE_FORMAT_R11G11B10_FLOAT &&
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+ util_format_is_float(format)) {
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+ return FALSE;
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+ }
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+
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assert(target == PIPE_BUFFER ||
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target == PIPE_TEXTURE_1D ||
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target == PIPE_TEXTURE_1D_ARRAY ||
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diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
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index 031602b..c279120 100644
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--- a/src/gallium/drivers/softpipe/sp_screen.c
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+++ b/src/gallium/drivers/softpipe/sp_screen.c
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@@ -358,6 +358,13 @@ softpipe_is_format_supported( struct pipe_screen *screen,
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if (!format_desc)
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return FALSE;
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+ if ((bind & PIPE_BIND_RENDER_TARGET) &&
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+ format != PIPE_FORMAT_R9G9B9E5_FLOAT &&
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+ format != PIPE_FORMAT_R11G11B10_FLOAT &&
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+ util_format_is_float(format)) {
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+ return FALSE;
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+ }
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+
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if (sample_count > 1)
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return FALSE;
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--
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2.7.4
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