From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 27 Dec 2025 12:03:39 -0800
Subject: Initial commit

---
 .../src/render/gpu/shaders/build-shaders.sh        | 106 +++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100755 contrib/SDL-3.2.8/src/render/gpu/shaders/build-shaders.sh

(limited to 'contrib/SDL-3.2.8/src/render/gpu/shaders/build-shaders.sh')

diff --git a/contrib/SDL-3.2.8/src/render/gpu/shaders/build-shaders.sh b/contrib/SDL-3.2.8/src/render/gpu/shaders/build-shaders.sh
new file mode 100755
index 0000000..9b019e5
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/render/gpu/shaders/build-shaders.sh
@@ -0,0 +1,106 @@
+#!/usr/bin/env bash
+
+set -e
+
+# NOTE: fxc is tested on Linux with https://github.com/mozilla/fxc2
+
+which fxc &>/dev/null && HAVE_FXC=1 || HAVE_FXC=0
+which dxc &>/dev/null && HAVE_DXC=1 || HAVE_DXC=0
+which spirv-cross &>/dev/null && HAVE_SPIRV_CROSS=1 || HAVE_SPIRV_CROSS=0
+
+[ "$HAVE_FXC" != 0 ] || echo "fxc not in PATH; D3D11 shaders will not be rebuilt"
+[ "$HAVE_DXC" != 0 ] || echo "dxc not in PATH; D3D12 shaders will not be rebuilt"
+[ "$HAVE_SPIRV_CROSS" != 0 ] || echo "spirv-cross not in PATH; D3D11, D3D12, Metal shaders will not be rebuilt"
+
+USE_FXC=${USE_FXC:-$HAVE_FXC}
+USE_DXC=${USE_DXC:-$HAVE_DXC}
+USE_SPIRV_CROSS=${USE_SPIRV_CROSS:-$HAVE_SPIRV_CROSS}
+
+spirv_bundle="spir-v.h"
+dxbc50_bundle="dxbc50.h"
+dxil60_bundle="dxil60.h"
+metal_bundle="metal.h"
+
+rm -f "$spirv_bundle"
+[ "$USE_SPIRV_CROSS" != 0 ] && rm -f "$metal_bundle"
+[ "$USE_SPIRV_CROSS" != 0 ] && [ "$USE_FXC" != 0 ] && rm -f "$dxbc50_bundle"
+[ "$USE_SPIRV_CROSS" != 0 ] && [ "$USE_DXC" != 0 ] && rm -f "$dxil60_bundle"
+
+make-header() {
+    xxd -i "$1" | sed \
+        -e 's/^unsigned /const unsigned /g' \
+        -e 's,^const,static const,' \
+        > "$1.h"
+}
+
+compile-hlsl-dxbc() {
+    local src="$1"
+    local profile="$2"
+    local output_basename="$3"
+    local var_name="$(echo "$output_basename" | sed -e 's/\./_/g')"
+
+    fxc "$src" /E main /T $2 /Fh "$output_basename.tmp.h" || exit $?
+    sed \
+        -e "s/g_main/$var_name/;s/\r//g" \
+        -e 's,^const,static const,' \
+        -e 's,const unsigned,const signed,' \
+        < "$output_basename.tmp.h" \
+        > "$output_basename.h"
+    rm -f "$output_basename.tmp.h"
+}
+
+compile-hlsl-dxil() {
+    local src="$1"
+    local profile="$2"
+    local output_basename="$3"
+    local var_name="$(echo "$output_basename" | sed -e 's/\./_/g')"
+
+    dxc "$src" -E main -T $2 -Fh "$output_basename.tmp.h" -O3 || exit $?
+    sed \
+        -e "s/g_main/$var_name/;s/\r//g" \
+        -e 's,^const,static const,' \
+        < "$output_basename.tmp.h" \
+        > "$output_basename.h"
+    rm -f "$output_basename.tmp.h"
+}
+
+for i in *.vert *.frag; do
+    spv="$i.spv"
+    metal="$i.metal"
+    hlsl50="$i.sm50.hlsl"
+    dxbc50="$i.sm50.dxbc"
+    hlsl60="$i.sm60.hlsl"
+    dxil60="$i.sm60.dxil"
+
+    glslangValidator -g0 -Os "$i" -V -o "$spv" --quiet
+
+    make-header "$spv"
+    echo "#include \"$spv.h\"" >> "$spirv_bundle"
+
+    if [ "$USE_SPIRV_CROSS" = "0" ]; then
+        continue
+    fi
+
+    spirv-cross "$spv" --hlsl --shader-model 50 --hlsl-enable-compat --output "$hlsl50"
+    spirv-cross "$spv" --hlsl --shader-model 60 --hlsl-enable-compat --output "$hlsl60"
+
+    if [ "${i##*.}" == "frag" ]; then
+        hlsl_stage="ps"
+    else
+        hlsl_stage="vs"
+    fi
+
+    if [ "$USE_FXC" != "0" ]; then
+        compile-hlsl-dxbc "$hlsl50" ${hlsl_stage}_5_0 "$dxbc50"
+        echo "#include \"$dxbc50.h\"" >> "$dxbc50_bundle"
+    fi
+
+    if [ "$USE_DXC" != "0" ]; then
+        compile-hlsl-dxil "$hlsl60" ${hlsl_stage}_6_0 "$dxil60"
+        echo "#include \"$dxil60.h\"" >> "$dxil60_bundle"
+    fi
+
+    spirv-cross "$spv" --msl --output "$metal"
+    make-header "$metal"
+    echo "#include \"$metal.h\"" >> "$metal_bundle"
+done
-- 
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