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swscale/ops: add SWS_COMP_SWAPPED

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This flag keeps track of whether a pixel is currently byte-swapped or
not. Not needed by current backends, but informative and useful for
catching potential endianness errors.

Updates a lot of FATE tests with a cosmetic diff like this:

 rgb24 -> gray16be:
   [ u8 XXXX -> +++X] SWS_OP_READ         : 3 elem(s) packed >> 0
   [ u8 ...X -> +++X] SWS_OP_CONVERT      : u8 -> f32
   [f32 ...X -> .++X] SWS_OP_LINEAR       : dot3 [...]
   [f32 .XXX -> +++X] SWS_OP_CONVERT      : f32 -> u16
-  [u16 .XXX -> +++X] SWS_OP_SWAP_BYTES
-  [u16 .XXX -> +++X] SWS_OP_WRITE        : 1 elem(s) planar >> 0
-    (X = unused, + = exact, 0 = zero)
+  [u16 .XXX -> zzzX] SWS_OP_SWAP_BYTES
+  [u16 .XXX -> zzzX] SWS_OP_WRITE        : 1 elem(s) planar >> 0
+    (X = unused, z = byteswapped, + = exact, 0 = zero)

(The choice of `z` to represent swapped integers is arbitrary, but I think
it's visually evocative and distinct from the other symbols)
This commit is contained in:
Niklas Haas
2025-12-23 14:36:42 +01:00
committed by Niklas Haas
parent 5a6602e959
commit 5f1be98f62
4 changed files with 15 additions and 6 deletions
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tests/ref/fate/sws-ops-list
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