[Mesa-dev] [PATCH 00/20] Auto-generate pack/unpack functions

[Iago Toral Quiroga]

This is the fist of two series of patches to address:
https://bugs.freedesktop.org/show_bug.cgi?id=84566

The idea is that we have a lot of format conversion code scattered through
different files in the repository, a lot of that is redundant / duplicated,
so this intends to address that issue.

The goal of this first series is to address auto-generation of our pack/unpack
functions (format_pack.c and format_unpack.c). Currently, we  have a ton of
hand-coded pack/unpack functions for lots of formats, but we can auto-generate
most of that code instead, so this series handles this.

This is based on initial work by Jason Ekstrand.

Tested on i965, classic swrast and gallium (radeon, nouveau, llvmpipe) without
regressions.

For software drivers we worked with a trimmed set of piglit tests (related to
format conversion), ~5700 tests selected with the following filter:

-t format -t color -t tex -t image -t swizzle -t clamp -t rgb -t lum -t pix
-t fbo -t frame

Summary of the patches:
 * Patches 1-7 are general fixes to the current code that were found while
   working on this.
 * Patches 8-16 implement auto-generation of pack/unpack functions.
 * Patches 17-20 make use of the auto-generated pack/unpack functions in
   various places to simplify the current code.

Notice that some of the fixes in patches 1-7 will become obsolete as soon as
we auto-generate the pack/unpack functions, but we thought it would make sense
to keep them in the patch set anyway since we started from that base and they
should be correct fixes to the currently existing code.

Iago Toral Quiroga (1):
  swrast: Remove unused variable.

Jason Ekstrand (9):
  mesa/format_utils: Fix a bug in one of the format helper functions
  mesa: Fix packing/unpacking of MESA_FORMAT_R5G6B5_UNORM
  mesa/colormac: Remove an unused macro
  mesa: Fix A1R5G5B5 packing/unpacking
  mesa/format_utils: Prefix and expose the conversion helper functions
  mesa: Add a concept of an array format
  mesa: Add a _mesa_is_format_color_format helper
  mesa: Autogenerate most of format_pack.c
  mesa: Autogenerate format_unpack.c

Samuel Iglesias Gonsalvez (10):
  mesa: Fix get_texbuffer_format().
  mesa: Fix _mesa_swizzle_and_convert integer conversions to clamp
    properly
  mesa: Add _mesa_pack_uint_rgba_row() format conversion function
  mesa: Add non-normalized formats support for ubyte packing functions
  mesa/format_pack: Add _mesa_pack_int_rgba_row()
  mesa/formats: add new mesa formats and their pack/unpack functions.
  mesa: use format conversion functions in swrast
  mesa/pack: use autogenerated format_pack functions
  mesa/main/pack_tmp.h: Add float conversion support
  mesa/pack: refactor _mesa_pack_rgba_span_float()

 src/mesa/Makefile.am               |   18 +
 src/mesa/Makefile.sources          |    4 +-
 src/mesa/main/colormac.h           |    3 -
 src/mesa/main/format_convert.py    |   71 +
 src/mesa/main/format_info.py       |   41 +
 src/mesa/main/format_pack.c        | 2994 ------------------------
 src/mesa/main/format_pack.c.mako   | 1147 ++++++++++
 src/mesa/main/format_pack.h        |    6 +
 src/mesa/main/format_unpack.c      | 4400 ------------------------------------
 src/mesa/main/format_unpack.c.mako |  914 ++++++++
 src/mesa/main/format_utils.c       |  248 +-
 src/mesa/main/format_utils.h       |  105 +
 src/mesa/main/formats.c            |  193 +-
 src/mesa/main/formats.csv          |   13 +
 src/mesa/main/formats.h            |   73 +
 src/mesa/main/pack.c               | 2111 +++--------------
 src/mesa/main/pack_tmp.h           |   76 +-
 src/mesa/main/run_mako.py          |    7 +
 src/mesa/main/teximage.c           |    4 +-
 src/mesa/main/texstore.c           |    2 +-
 src/mesa/swrast/s_drawpix.c        |    3 -
 src/mesa/swrast/s_texfetch.c       |   13 +
 src/mesa/swrast/s_texfetch_tmp.h   | 1359 +----------
 23 files changed, 3222 insertions(+), 10583 deletions(-)
 create mode 100644 src/mesa/main/format_convert.py
 delete mode 100644 src/mesa/main/format_pack.c
 create mode 100644 src/mesa/main/format_pack.c.mako
 delete mode 100644 src/mesa/main/format_unpack.c
 create mode 100644 src/mesa/main/format_unpack.c.mako
 create mode 100644 src/mesa/main/run_mako.py

-- 
1.9.1