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[READ-ONLY] Mirror of https://github.com/crutchcorn/ScreenSlanger. Easy to use utility to apply slang shaders to your macOS monitors.
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if [[ "$(uname -s)" != "Darwin" ]]; then echo "ScreenSlanger's dependencies must be installed on macOS." >&2 exit 1fi
project_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"slang_version="2026.18"librashader_version="0.12.0-screenslanger.3"librashader_upstream_version="0.12.0"librashader_source_sha256="4bf8cf2489d00848dcabbf2163204093776082da4217d5a5db45e4cbf335cedf"librashader_rust_version="1.93.0"librashader_patches=(0001-skip-unused-final-target.patch 0002-compact-grayscale-luts.patch 0003-stream-metal-lut-loading.patch 0004-isolate-retroarch-compiler.patch)# Reviewed patches against the checksum-pinned source archive, not upstream binaries.librashader_patch_sha256=(f5a9c09c0f7a72059eb536fbd63eacbc513bea5fe964e70f3a122ae61bfd90fb 2fd5bd08afabf7f0ee6c8329fcfda778b6460001d7de50145c32af329138fe5e 3e3c574a0b8940f04502bece08442ab297bc1b9a7de89dff412b51566de9acfe 1956179bfa7f89e4318c1aa3982656d24ea63e6dffe9494d87ad64a3f27dac8f)# Checksums published with the official v2026.18 GitHub release assets.# https://github.com/shader-slang/slang/releases/tag/v2026.18case "$(uname -m)" in arm64) slang_arch="aarch64" slang_sha256="59833c5cfa12aad72c6fbad9cfcc06be8781ecd58c5983e6c79425e819e16bb2" librashader_arch="arm64" ;; x86_64) slang_arch="x86_64" slang_sha256="8d27b7020b102beecaa769c1ff7342dd2534c14cfae505a36e1b71d595208739" librashader_arch="x86_64" ;; *) echo "Unsupported Mac architecture: $(uname -m)" >&2 exit 1 ;;esac
slang_root="$HOME/Library/Application Support/ScreenSlanger/Tools/slang"slang_directory="$slang_root/$slang_version"mkdir -p "$slang_root"
if [[ -e "$slang_root/current" && ! -L "$slang_root/current" ]]; then echo "$slang_root/current exists and is not a symlink; leaving it unchanged." >&2 exit 1fi
if [[ ! -e "$slang_directory" ]]; then staging_directory="$(mktemp -d "$slang_root/.install.XXXXXX")" trap 'rm -rf "$staging_directory"' EXIT archive_url="https://github.com/shader-slang/slang/releases/download/v$slang_version/slang-$slang_version-macos-$slang_arch.tar.gz" curl --fail --location --retry 3 "$archive_url" --output "$staging_directory/slang.tar.gz" ( cd "$staging_directory" printf '%s slang.tar.gz\n' "$slang_sha256" | shasum -a 256 --check - ) mkdir "$staging_directory/unpacked" tar -xzf "$staging_directory/slang.tar.gz" -C "$staging_directory/unpacked" installed_version="$("$staging_directory/unpacked/bin/slangc" -version 2>&1)" if [[ "$installed_version" != "$slang_version" ]]; then echo "Expected Slang $slang_version, got $installed_version; installation stopped." >&2 exit 1 fi mv "$staging_directory/unpacked" "$slang_directory" rm -rf "$staging_directory" trap - EXITfi
installed_version="$("$slang_directory/bin/slangc" -version 2>&1)"if [[ "$installed_version" != "$slang_version" ]]; then echo "Unexpected Slang version in $slang_directory: $installed_version" >&2 exit 1filn -sfn "$slang_version" "$slang_root/current"
# Compile our Metal-only runtime during setup. Normal Xcode builds only copy it.# A distinct version preserves official and previous local runtimes for comparisons.librashader_root="$HOME/Library/Application Support/ScreenSlanger/Tools/librashader"librashader_directory="$librashader_root/$librashader_version"patch_directory="$project_dir/Vendor/CLibrashader/patches"for index in "${!librashader_patches[@]}"; do ( cd "$patch_directory" printf '%s %s\n' "${librashader_patch_sha256[$index]}" "${librashader_patches[$index]}" | shasum -a 256 --check - )doneexpected_build_info="$(cat <<BUILD_INFOScreenSlanger librashader runtime: $librashader_versionUpstream tag: librashader-v$librashader_upstream_versionUpstream archive SHA-256: $librashader_source_sha256Patch 1 SHA-256: ${librashader_patch_sha256[0]}Patch 2 SHA-256: ${librashader_patch_sha256[1]}Patch 3 SHA-256: ${librashader_patch_sha256[2]}Patch 4 SHA-256: ${librashader_patch_sha256[3]}Rust toolchain: $librashader_rust_versionArchitecture: $librashader_archMACOSX_DEPLOYMENT_TARGET: 27.0CARGO_PROFILE_OPTIMIZED_STRIP: noneBuild: cargo +$librashader_rust_version build --locked --profile optimized --package librashader-capi --package librashader-reflect --bin librashader-compiler --lib --no-default-features --features librashader-capi/runtime-metal,librashader-reflect/glslang-inBUILD_INFO)"mkdir -p "$librashader_root"if [[ ! -e "$librashader_directory" ]]; then if ! command -v rustup >/dev/null || ! rustup run "$librashader_rust_version" rustc --version >/dev/null 2>&1; then echo "Install Rust with rustup (https://rustup.rs/), then run: rustup toolchain install $librashader_rust_version --profile minimal" >&2 exit 1 fi if ! xcrun --sdk macosx --find clang++ >/dev/null 2>&1; then echo "Select Xcode 27 with xcode-select before building librashader." >&2 exit 1 fi staging_directory="$(mktemp -d "$librashader_root/.install.XXXXXX")" trap 'rm -rf "$staging_directory"' EXIT source_archive="librashader-v$librashader_upstream_version-source.tar.gz" archive_url="https://github.com/SnowflakePowered/librashader/archive/refs/tags/librashader-v$librashader_upstream_version.tar.gz" mkdir "$staging_directory/install" "$staging_directory/source" curl --fail --location --retry 3 "$archive_url" --output "$staging_directory/install/$source_archive" ( cd "$staging_directory/install" printf '%s %s\n' "$librashader_source_sha256" "$source_archive" | shasum -a 256 --check - ) tar -xzf "$staging_directory/install/$source_archive" --strip-components 1 -C "$staging_directory/source" for patch_file in "${librashader_patches[@]}"; do cp "$patch_directory/$patch_file" "$staging_directory/install/$patch_file" (cd "$staging_directory/source" && /usr/bin/patch --batch --forward --fuzz=0 -p1 < "$staging_directory/install/$patch_file") done ( cd "$staging_directory/source" # Cargo.lock pins Rust and embedded C/C++ dependencies. Downloading crates # and compiling them happens here, never in the app's Xcode build phase. # Rust 1.93's stripping can misalign LINKEDIT string pools rejected by # macOS 27 dyld, including build-time proc macros. Keep optimization/LTO, # but disable stripping for the complete profile, including build tools. MACOSX_DEPLOYMENT_TARGET=27.0 SDKROOT="$(xcrun --sdk macosx --show-sdk-path)" \ CARGO_PROFILE_OPTIMIZED_STRIP=none \ CARGO_TARGET_DIR="$staging_directory/target" \ cargo +"$librashader_rust_version" build --locked --profile optimized \ --package librashader-capi --package librashader-reflect \ --bin librashader-compiler --lib --no-default-features \ --features librashader-capi/runtime-metal,librashader-reflect/glslang-in ) cp "$staging_directory/target/optimized/liblibrashader_capi.dylib" "$staging_directory/install/librashader.dylib" cp "$staging_directory/target/optimized/librashader-compiler" "$staging_directory/install/librashader-compiler" /usr/bin/lipo "$staging_directory/install/librashader.dylib" -verify_arch "$librashader_arch" /usr/bin/lipo "$staging_directory/install/librashader-compiler" -verify_arch "$librashader_arch" printf '%s\n' "$expected_build_info" > "$staging_directory/install/BUILD-INFO.txt" ( cd "$staging_directory/install" shasum -a 256 "$source_archive" "${librashader_patches[@]}" > SHA256SUMS shasum -a 256 librashader.dylib librashader-compiler > RUNTIME.sha256 ) mv "$staging_directory/install" "$librashader_directory" rm -rf "$staging_directory" trap - EXITfiif [[ ! -f "$librashader_directory/BUILD-INFO.txt" || "$(cat "$librashader_directory/BUILD-INFO.txt")" != "$expected_build_info" ]]; then echo "Unexpected build provenance in $librashader_directory; installation stopped. Use a new runtime version when changing its source, patches, or build settings." >&2 exit 1fi( cd "$librashader_directory" shasum -a 256 --check SHA256SUMS shasum -a 256 --check RUNTIME.sha256)cp "$project_dir/Vendor/CLibrashader/LICENSE-MPL-2.0.md" "$librashader_directory/LICENSE-MPL-2.0.md"cp "$project_dir/Vendor/CLibrashader/NOTICE.md" "$librashader_directory/NOTICE.md"cp "$project_dir/Vendor/CLibrashader/BUILDING.md" "$librashader_directory/BUILDING.md"
printf '\nInstalled ScreenSlanger dependencies:\n'printf 'slang %s (%s)\n' "$installed_version" "$slang_root/current/bin/slangc"printf 'librashader %s (%s)\n' "$librashader_version" "$librashader_directory/librashader.dylib"printf 'librashader compiler (%s)\n' "$librashader_directory/librashader-compiler"