cultmath glsl build: build-glsl.sh, pinned tools, pipeline, ES 3.00 and consumer checks
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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packages/cultmath/tools/glsl/build-glsl.sh
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74
packages/cultmath/tools/glsl/build-glsl.sh
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#!/usr/bin/env bash
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# Builds the library GLSL from the HLSL: dxc lib_6_3 -spirv -Od, one SPIR-V edit, a fixed spirv-opt pair, SPIRV-Cross,
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# partition. Linux, run from the repository root: build-glsl.sh <outdir>
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# Writes core.glsl, cycles.glsl and phacelle.glsl bodies into <outdir>; the committed GLSL is untouched.
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# Tools are cached in GLSL_TOOLS (default packages/cultmath/.tools/glsl, gitignored): the pinned dxc tarball and
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# SPIRV-Cross, SPIRV-Tools, SPIRV-Headers at TAG built with cmake.
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set -euo pipefail
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OUT=$(realpath -m "${1:?usage: build-glsl.sh <outdir>}")
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ROOT=$(pwd)
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CM=$ROOT/packages/cultmath
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G=$CM/tools/glsl
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TOOLS=$(realpath -m "${GLSL_TOOLS:-$CM/.tools/glsl}")
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TAG=vulkan-sdk-1.4.363.0
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DXC_URL=https://github.com/microsoft/DirectXShaderCompiler/releases/download/v1.9.2607/linux_dxc_2026_07_29.x86_x64.tar.gz
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DXC_SHA=55665c87824051ed4774ff3280a79ccbbb7d39243b9736ca5e98222134112d54
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W=$(mktemp -d)
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mkdir -p "$TOOLS" "$OUT"
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export DEBIAN_FRONTEND=noninteractive
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apt-get update -qq >/dev/null
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apt-get install -y -qq --no-install-recommends ca-certificates curl git cmake g++ make python3 glslang-tools >/dev/null
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if [ ! -x "$TOOLS/dxc.ok" ]; then
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curl -sL --fail -o "$TOOLS/dxc.tgz" "$DXC_URL"
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echo "$DXC_SHA $TOOLS/dxc.tgz" | sha256sum -c - >/dev/null || { echo "dxc tarball sha256 differs from the pinned one"; rm -f "$TOOLS/dxc.tgz"; exit 1; }
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rm -rf "$TOOLS/dxc"; mkdir -p "$TOOLS/dxc"; tar xzf "$TOOLS/dxc.tgz" -C "$TOOLS/dxc"; : >"$TOOLS/dxc.ok"
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fi
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DXC=$(find "$TOOLS/dxc" -name dxc -type f | head -1)
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export LD_LIBRARY_PATH=$(dirname "$DXC")/../lib:$(dirname "$DXC")${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
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if [ ! -x "$TOOLS/bin/spirv-cross" ]; then
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git clone -q --depth 1 --branch $TAG https://github.com/KhronosGroup/SPIRV-Cross.git "$TOOLS/sc-src"
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cmake -S "$TOOLS/sc-src" -B "$TOOLS/sc-build" -DCMAKE_BUILD_TYPE=Release -DSPIRV_CROSS_ENABLE_TESTS=OFF -DSPIRV_CROSS_CLI=ON >/dev/null
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cmake --build "$TOOLS/sc-build" --target spirv-cross -j8 >/dev/null
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mkdir -p "$TOOLS/bin"; cp "$TOOLS/sc-build/spirv-cross" "$TOOLS/bin/"
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fi
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if [ ! -x "$TOOLS/bin/spirv-opt" ]; then
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git clone -q --depth 1 --branch $TAG https://github.com/KhronosGroup/SPIRV-Tools.git "$TOOLS/st-src"
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git clone -q --depth 1 --branch $TAG https://github.com/KhronosGroup/SPIRV-Headers.git "$TOOLS/st-src/external/spirv-headers"
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cmake -S "$TOOLS/st-src" -B "$TOOLS/st-build" -DCMAKE_BUILD_TYPE=Release -DSPIRV_SKIP_TESTS=ON -DSPIRV_WERROR=OFF >/dev/null
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cmake --build "$TOOLS/st-build" --target spirv-opt spirv-val -j8 >/dev/null
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mkdir -p "$TOOLS/bin"; cp "$TOOLS/st-build/tools/spirv-opt" "$TOOLS/st-build/tools/spirv-val" "$TOOLS/bin/"
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fi
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export PATH=$TOOLS/bin:$PATH
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echo "dxc: $("$DXC" --version | head -1)"; echo "spirv-opt: $(spirv-opt --version | head -1)"
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python3 "$G/wrappers.py" "$CM/shaders" "$W/shw"
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"$DXC" -T lib_6_3 -HV 2021 -spirv -fspv-target-env=universal1.5 -Od -I "$W/shw" "$W/shw/cm_wrappers.hlsl" -Fo "$W/lib.spv" >"$W/dxc.log" 2>&1 || { head -20 "$W/dxc.log"; exit 1; }
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python3 "$G/spvedit.py" "$W/lib.spv" "$W/edited.spv" "$W/shw/wrappers.tsv"
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spirv-val --target-env spv1.5 "$W/edited.spv"
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spirv-opt --target-env=spv1.5 --eliminate-local-single-store --eliminate-dead-code-aggressive "$W/edited.spv" -o "$W/opt.spv"
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spirv-val --target-env spv1.5 "$W/opt.spv"
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spirv-cross "$W/opt.spv" --es --version 310 --relax-nan-checks --output "$W/cross.glsl"
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python3 "$G/partition.py" "$CM/shaders" "$W/cross.glsl" "$OUT"
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# Consumer checks: glslang ES 3.00 fragment compiles of every include combination, and a consumer calling overloads
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# with an r-value argument.
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CONSUMER='out highp vec4 c;
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void main() { vec3 p = gl_FragCoord.xyz; c = vec4(cultmath_lerp(p, p.yzx, vec3(0.5)), cultmath_lerp(1.0, 2.0, p.x)) + cultmath_saturate(vec4(p, 1.0)) + vec4(cultmath_smootherstep(gl_FragCoord.x + 1.0)); }'
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for combo in "core" "core cycles" "core phacelle" "core cycles phacelle"; do
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f=$W/check.frag; printf '#version 300 es\nprecision highp float;\nprecision highp int;\n' >"$f"
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for part in $combo; do cat "$OUT/$part.glsl" >>"$f"; done
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printf '%s\n' "$CONSUMER" >>"$f"
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glslangValidator "$f" >"$W/check.log" 2>&1 || { echo "ES 3.00 compile failed for [$combo]"; head -8 "$W/check.log"; exit 1; }
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echo "ES 3.00 ok: $combo"
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done
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for part in core cycles phacelle; do
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g=$OUT/$part.glsl
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fn=$(grep -cE '^[A-Za-z_]\w* [A-Za-z_]\w*\(.*\)$' "$g" || true)
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names=$(grep -oE '^[A-Za-z_]\w* [A-Za-z_]\w*\(' "$g" | awk '{print $2}' | sort -u | wc -l)
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echo "$part: functions $fn, distinct names $names, lines $(wc -l <"$g"), bytes $(wc -c <"$g"), sha256 $(sha256sum "$g" | cut -c1-64)"
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done
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echo "suffixed ids: $(cat "$OUT"/*.glsl | grep -oE '\bcultmath_\w+_[0-9]+\(' | sort -u | wc -l); inout: $(cat "$OUT"/*.glsl | grep -c inout || true)"
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