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graphics: remove libjpeg from XP builds, fetch at build time (#874)

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Replaces the vendored `external/libjpeg-turbo` tree (191 files) with the
`mingw-w64-libjpeg-turbo` AUR package, already built into the Docker
deps image.

The WinXP toolchains set `CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY`
against their own sysroot, so they cannot see AUR mingw packages. Those
targets now build without JPEG support: `jpeg_encoder::encode` compiles
to a stub returning `false`, which callers already treat as "no frame
available". The practical effect is that `capture.get_jpg` over the API
is unavailable on WinXP builds; every other target is unchanged.

CMake names `libjpeg.a` outright, since the package also ships an import
library and linking that would add a runtime DLL dependency.
This commit is contained in:
bicarus
2026-08-18 08:57:18 -07:00
committed by GitHub
parent 0f4ab63101
commit 7c50fcc79e
194 changed files with 44 additions and 82635 deletions
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src/spice2x/external/docker/Dockerfile
Vendored
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@@ -24,3 +24,7 @@ ENV PATH="$PATH:/opt/llvm-mingw-xp/bin"
RUN curl -fsSL "https://github.com/mon/windows-dll-compat-checker/releases/download/v1.3/windows_dll_compat_checker-linux-x86_64.tar.xz" \
| tar -xJ -C /usr/local/bin
# libjpeg-turbo for JPEG encoding. Only the mingw-w64 toolchains get it;
# the WinXP targets build without JPEG support entirely.
RUN su user -c "yay --noconfirm -S mingw-w64-libjpeg-turbo"