File u_mesa-8.0.1-fix-16bpp.patch of Package Mesa

From 60fe1551667dba2cb9afa085fdff0cbc351a3e73 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Mon, 2 Apr 2012 16:27:19 +0000
Subject: [PATCH 2/2] glx: Fix 16bpp in llvmpipe.

v2: Richard Hughes <richard@hughsie.com>
Rebuild with new git snapshot
- Remove upstreamed patches

v3: Johannes Obermayr <johannesobermayr@gmx.de>
Revert changes made in v2.
---

v2 has not been applied on Fedora for a while (since 9.0):
http://pkgs.fedoraproject.org/cgit/mesa.git/commit/?h=f18&id=9058f5a
# this fastpath is:
# - broken with swrast classic
# - broken on 24bpp
# - not a huge win anyway
# - ABI-broken wrt upstream
# - eventually obsoleted by vgem
#
# dear ajax: fix this one way or the other
#patch9 -p1 -b .shmget
#patch12 -p1 -b .16bpp

This "broken on 24bpp" could be because v2 removed changes which depend on
XShmGetImage patch. I assume Richard didn't notice this dependency and thought
changes were upstreamed:
http://pkgs.fedoraproject.org/cgit/mesa.git/commit/?id=43e76b8
So revert v2 and apply XShmGetImage patch before.

---
 src/glx/drisw_glx.c                 | 4 +++-
 src/mesa/state_tracker/st_manager.c | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/glx/drisw_glx.c b/src/glx/drisw_glx.c
index 08fa1d9..f94fa4b 100644
--- a/src/glx/drisw_glx.c
+++ b/src/glx/drisw_glx.c
@@ -277,7 +277,9 @@ swrastShmGetImage(__DRIdrawable *read, char *data, struct drisw_drawable *prp)
     do {
 	int i;
 	char *src = ximage->data;
-	int dst_width = align(ximage->width * ximage->bits_per_pixel / 8, 256);
+	int bytes_per_pixel = ((ximage->bits_per_pixel + 7) / 8);
+	int dst_width = align(ximage->width * bytes_per_pixel,
+			      64 * bytes_per_pixel);
 
 	for (i = 0; i < ximage->height; i++) {
 	    memcpy(data, src, ximage->bytes_per_line);
diff --git a/src/mesa/state_tracker/st_manager.c b/src/mesa/state_tracker/st_manager.c
index 9c2b4d2..c6a3189 100644
--- a/src/mesa/state_tracker/st_manager.c
+++ b/src/mesa/state_tracker/st_manager.c
@@ -512,6 +512,9 @@ st_context_teximage(struct st_context_iface *stctxi,
 
       if (util_format_has_alpha(tex->format))
          internalFormat = GL_RGBA;
+      else if (util_format_get_component_bits(pipe_format,
+                 UTIL_FORMAT_COLORSPACE_RGB, 0) == 5)
+         internalFormat = GL_RGB5;
       else
          internalFormat = GL_RGB;
 
-- 
1.8.1.4