File u_dri-Fix-BGR-format-exclusion.patch of Package Mesa

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File u_dri-Fix-BGR-format-exclusion.patch of Package Mesa (Revision 8110cd2fc7e30001196f4744cc50dd03)

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From 79ca6e3a329dbfc3bc68df37b8f3ea7156e41aae Mon Sep 17 00:00:00 2001
From: Daniel Stone <daniels@collabora.com>
Date: Fri, 21 Jun 2024 11:24:31 +0100
Subject: [PATCH] dri: Fix BGR format exclusion

The check we had for BGR vs. RGB formats was testing completely the
wrong thing. Fix it so we can restore the previous set of configs we
expose to the frontend, which also fixes surfaceless platform on s390x.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Fixes: ad0edea53a73 ("st/dri: Check format properties from format helpers")
Closes: mesa/mesa#11360
---
 src/gallium/frontends/dri/dri_screen.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/gallium/frontends/dri/dri_screen.c b/src/gallium/frontends/dri/dri_screen.c
index 6bc61dbd641..debff54c090 100644
--- a/src/gallium/frontends/dri/dri_screen.c
+++ b/src/gallium/frontends/dri/dri_screen.c
@@ -386,17 +386,21 @@ dri_fill_in_modes(struct dri_screen *screen)
       uint8_t msaa_modes[MSAA_VISUAL_MAX_SAMPLES];
 
       /* Expose only BGRA ordering if the loader doesn't support RGBA ordering. */
-      if (!allow_rgba_ordering &&
-          util_format_get_component_shift(pipe_formats[f],
-                                          UTIL_FORMAT_COLORSPACE_RGB, 0)
+      if (!allow_rgba_ordering) {
+          unsigned sh_ax = util_format_get_component_shift(pipe_formats[f], UTIL_FORMAT_COLORSPACE_RGB, 3);
+          unsigned sh_b = util_format_get_component_shift(pipe_formats[f], UTIL_FORMAT_COLORSPACE_RGB, 2);
 #if UTIL_ARCH_BIG_ENDIAN
-         >
+          unsigned sz_b = util_format_get_component_bits(pipe_formats[f], UTIL_FORMAT_COLORSPACE_RGB, 2);
+
+          if (sz_b + sh_b == sh_ax)
+             continue;
 #else
-         <
+          unsigned sz_ax = util_format_get_component_bits(pipe_formats[f], UTIL_FORMAT_COLORSPACE_RGB, 3);
+
+          if (sz_ax + sh_ax == sh_b)
+             continue;
 #endif
-          util_format_get_component_shift(pipe_formats[f],
-                                          UTIL_FORMAT_COLORSPACE_RGB, 2))
-         continue;
+       }
 
       if (!allow_rgb10 &&
           util_format_get_component_bits(pipe_formats[f],
-- 
2.35.3

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File u_dri-Fix-BGR-format-exclusion.patch of Package Mesa (Revision 8110cd2fc7e30001196f4744cc50dd03)

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