Richard Geldreich 57a0a0b4c6 previewers: regenerate single-file transcoder with KTX2/Zstd enabled ...

Regenerate contrib/previewers/lib/basisu_transcoder.cpp from the current
transcoder sources with the single_file_transcoder combine.py script,
replacing a long-stale copy. KTX2 and Zstd are enabled.

Only the Basis Universal sources are amalgamated; Zstd is kept as an
ordinary #include "../zstd/zstd.h" (via combine.py's -k option) rather
than being inlined, and zstd/zstd.c is compiled and linked separately,
so Zstd is neither touched nor duplicated.

Update the previewers project to build the current (C++17) transcoder:
- set LanguageStandard to stdcpp17 (the transcoder uses inline variables
  and other C++17 features);
- define NOMINMAX (the Windows shell headers, included before the
  transcoder, otherwise define min/max macros that break the
  std::numeric_limits<>::max() calls);
- add the zstd directory to the include paths and compile
  ..\..\..\zstd\zstd.c as a separate compilation unit.

The DLL builds for Debug/Release, x64 and Win32. The previewer still
only registers .basis files; enabling KTX2/Zstd just makes the
transcoder compile cleanly out of the box.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-07-18 17:59:57 -04:00

3.9 MiB

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