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feat: ✨ enable WASM 3D viewer build — FFP link stubs, drop glemu shim

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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Istvan Matejcsok 2026-06-18 10:43:45 +02:00
commit 0195ff0941
5 changed files with 157 additions and 434 deletions
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12
scripts/kicad/build-kicad-target.sh
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@ -388,14 +388,18 @@ if [ "${APP_NAME}" = "sym_convert" ]; then
fi
# 3D viewer (experimental): opt in with BUILD_3D_VIEWER=ON. Default OFF keeps
# existing/CI builds unchanged and the 3D stubs in place. When ON, the 3D
# viewer's fixed-function OpenGL renderer needs Emscripten's legacy GL emulation
# plus our immediate-mode shim (color-per-vertex + double-precision helpers).
# existing/CI builds unchanged and the 3D stubs in place. When ON, the 3D viewer
# renders with the GL-free CPU raytracer (RENDER_3D_RAYTRACE_RAM) blitted to the
# canvas through a plain WebGL2 textured quad — no -sLEGACY_GL_EMULATION. KiCad's
# fixed-function OpenGL renderer is still compiled (shared files reference it) but
# never executed on WASM, so its FFP/GLU entry points are satisfied at link time
# by no-op stubs (gl_ffp_stub.c). See docs/features/fork-cleanup/10-3d-viewer.md.
BUILD_3D_VIEWER="${BUILD_3D_VIEWER:-OFF}"
GL3D_LINK_FLAGS=""
if [ "${BUILD_3D_VIEWER}" = "ON" ]; then
log_info "3D viewer ENABLED for WASM (BUILD_3D_VIEWER=ON)"
GL3D_LINK_FLAGS="-sLEGACY_GL_EMULATION --js-library ${WASM_LAYER}/shims/gl_immediate_shim.js"
emcc -c -I"${STUBS_DIR}" "${STUBS_DIR}/gl_ffp_stub.c" -o "${STUBS_BUILD}/gl_ffp_stub.o"
GL3D_LINK_FLAGS="${STUBS_BUILD}/gl_ffp_stub.o"
fi
emcmake cmake "${KICAD_DIR}" \