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B44: initialize exp/log tables at runtime #2126

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56f6e51
B44: initialize exp/log tables at runtime
aras-p Sep 11, 2025
494ac73
Trying to fix static builds
aras-p Sep 11, 2025
69f1e36
Fix threads=off build
aras-p Sep 11, 2025
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1 change: 1 addition & 0 deletions BUILD.bazel
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Original file line number Diff line number Diff line change
Expand Up @@ -176,6 +176,7 @@ cc_library(
"src/lib/OpenEXRCore/internal_attr.h",
"src/lib/OpenEXRCore/internal_b44.c",
"src/lib/OpenEXRCore/internal_b44_table.c",
"src/lib/OpenEXRCore/internal_b44_table_init.c",
"src/lib/OpenEXRCore/internal_bytes.h",
"src/lib/OpenEXRCore/internal_channel_list.h",
"src/lib/OpenEXRCore/internal_coding.h",
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108 changes: 0 additions & 108 deletions src/lib/OpenEXR/b44ExpLogTable.cpp
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This file was deleted.

1 change: 1 addition & 0 deletions src/lib/OpenEXRCore/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ openexr_define_library(OpenEXRCore
internal_pxr24.c
internal_b44.c
internal_b44_table.c
internal_b44_table_init.c
internal_piz.c
internal_ht.cpp
internal_ht_common.cpp
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9 changes: 7 additions & 2 deletions src/lib/OpenEXRCore/internal_b44.c
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Expand Up @@ -13,8 +13,9 @@

/**************************************/

extern const uint16_t* exrcore_expTable;
extern const uint16_t* exrcore_logTable;
extern uint16_t* exrcore_expTable;
extern uint16_t* exrcore_logTable;
extern void exrcore_ensure_b44_tables ();

static inline void
convertFromLinear (uint16_t s[16])
Expand Down Expand Up @@ -353,6 +354,8 @@ compress_b44_impl (exr_encode_pipeline_t* encode, int flat_field)
encode->packed_bytes);
if (rv != EXR_ERR_SUCCESS) return rv;

exrcore_ensure_b44_tables ();

nOut = 0;
packed = encode->packed_buffer;
for (int y = 0; y < encode->chunk.height; ++y)
Expand Down Expand Up @@ -698,6 +701,8 @@ internal_exr_undo_b44 (
compute_scratch_buffer_size (decode, uncompressed_size));
if (rv != EXR_ERR_SUCCESS) return rv;

exrcore_ensure_b44_tables ();

return uncompress_b44_impl (
decode,
compressed_data,
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