#!/bin/sh
# Regenerates src/guide_spirv.h from guide.vert / guide.frag (needs glslc: the Frame has it in /usr/bin).
set -e
cd "$(dirname "$0")"
glslc -O --target-env=vulkan1.1 -fshader-stage=vert guide.vert -o /tmp/guide.vert.spv
glslc -O --target-env=vulkan1.1 -fshader-stage=frag guide.frag -o /tmp/guide.frag.spv
python3 - /tmp/guide.vert.spv /tmp/guide.frag.spv > ../../src/guide_spirv.h <<'PY'
import struct, sys
print("#pragma once")
print("// GENERATED by tools/guide/gen_guide_spirv.sh from tools/guide/guide.{vert,frag}. Do not edit by hand.")
print("//   vert: in vec3 position @0, vec4 color @1; push { mat4 clipFromWorld[2]; }; spec 0 = alpha scale")
print("//   frag: out = color")
print("#include <cstddef>\n#include <cstdint>\n")
for name, path in (("Vert", sys.argv[1]), ("Frag", sys.argv[2])):
    data = open(path, "rb").read()
    words = struct.unpack("<%dI" % (len(data) // 4), data)
    print("static const uint32_t kGuide%sSpirv[] = {" % name)
    for i in range(0, len(words), 8):
        print("    " + ",".join("0x%08x" % w for w in words[i:i + 8]) + ",")
    print("};")
    print("static const size_t kGuide%sSize = sizeof(kGuide%sSpirv);\n" % (name, name))
PY