[Mesa-dev] [PATCH 0/5] Fix handling of LnAn and RnGn formats for big-endian

[Richard Sandiford]

MESA_FORMAT_LnAn_* puts the luminance in the low part of the integer and
the alpha in the high part.  The same goes for MESA_FORMAT_RnGn with the
red and green channels.

This series fixes gallium to be consistent with that layout on big-endian.
Following the convention established last year, PIPE_FORMAT_LAnn and
PIPE_FORMAT_RGnn are the equivalent gallium formats.  Where defined,
PIPE_FORMAT_LnAn puts the luminance first in memory and the alpha
last in memory.

Patch 1 also fixes an endianness bug in mesa swrast for MESA_FORMAT_L8A8_SRGB.
AFAICT all other L/A and R/G formats are handled correctly.

Richard Sandiford (5):
  swrast: Fix handling of MESA_FORMAT_L8A8_SRGB for big-endian
  util: Add PIPE_FORMAT_AnLn and PIPE_FORMAT_GnRn formats
  util: Define PIPE_FORMAT_{LA,AL,RG,GR}nn aliases
  Add MESA_FORMAT_A8L8_{SNORM,SRGB}
  Fix handling of LA and RG formats for big-endian

 src/gallium/auxiliary/util/u_format.csv         |  9 ++++
 src/gallium/include/pipe/p_format.h             | 42 ++++++++++++++++
 src/mesa/drivers/dri/i965/brw_surface_formats.c |  2 +
 src/mesa/main/format_pack.c                     | 37 ++++++++++++++
 src/mesa/main/format_unpack.c                   | 29 +++++++++++
 src/mesa/main/formats.c                         | 28 +++++++++++
 src/mesa/main/formats.h                         |  2 +
 src/mesa/main/texformat.c                       |  3 ++
 src/mesa/main/texstore.c                        | 10 +++-
 src/mesa/state_tracker/st_format.c              | 64 ++++++++++++++++++-------
 src/mesa/swrast/s_texfetch.c                    |  2 +
 src/mesa/swrast/s_texfetch_tmp.h                | 30 ++++++++++--
 12 files changed, 237 insertions(+), 21 deletions(-)

-- 
1.8.3.1