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Big Endian Support Removal.

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This commit implements #125759.

It removes:
* Blender does not build on big endian systems anymore.
* Support for opening blendfiles written from a big endian system is
  removed.

It keeps:
* Support to generate thumbnails from big endian blendfiles.
* BE support in `extern` or `intern` libraries, including Cycles.
* Support to open big endian versions of third party file formats:
  - PLY files.
  - Some image files (cineon, ...).

Pull Request: https://projects.blender.org/blender/blender/pulls/140138
This commit is contained in:
Bastien Montagne
2025-06-12 10:37:47 +02:00
committed by Bastien Montagne
parent 05d0391ed6
commit bc80ef136e
44 changed files with 438 additions and 651 deletions
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7
intern/guardedalloc/intern/mallocn_guarded_impl.cc
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@@ -174,11 +174,8 @@ static const char *check_memlist(const MemHead *memh);
/* locally used defines */
/* --------------------------------------------------------------------- */
#ifdef __BIG_ENDIAN__
# define MAKE_ID(a, b, c, d) (int(a) << 24 | int(b) << 16 | (c) << 8 | (d))
#else
# define MAKE_ID(a, b, c, d) (int(d) << 24 | int(c) << 16 | (b) << 8 | (a))
#endif
/* NOTE: this is endianness-sensitive. */
#define MAKE_ID(a, b, c, d) (int(d) << 24 | int(c) << 16 | (b) << 8 | (a))
#define MEMTAG1 MAKE_ID('M', 'E', 'M', 'O')
#define MEMTAG2 MAKE_ID('R', 'Y', 'B', 'L')