84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
#!/usr/bin/env python3
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"""Compile the stage-2 GPU-driven compute shaders (HZB build / cull / emit).
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Writes the same artifacts as scripts/compile_mesh3d_shaders.py:
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- <name>.comp.spv (tracked binary)
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- <name>_comp_spv.inc (embedded C++ array, consumed by Graphics.cpp)
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"""
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from __future__ import annotations
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import struct
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import subprocess
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import sys
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from pathlib import Path
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ROOT = Path(__file__).resolve().parents[1]
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SHADER_DIR = ROOT / "src" / "modules" / "graphics" / "shaders"
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SHADERS = [
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("hzb_build.comp", "comp"),
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("gpu_cull.comp", "comp"),
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("gpu_emit.comp", "comp"),
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("vg_main_cull.comp", "comp"),
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]
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def spv_to_inc(spv_path: Path, array_name: str, out_path: Path) -> None:
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data = spv_path.read_bytes()
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if len(data) % 4 != 0:
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raise SystemExit(f"SPIR-V size not multiple of 4: {spv_path}")
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words = struct.unpack(f"<{len(data) // 4}I", data)
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if not words or words[0] != 0x07230203:
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raise SystemExit(f"bad SPIR-V magic in {spv_path}")
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lines = [f"static const uint32_t {array_name}[] = {{"]
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row: list[str] = []
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for i, w in enumerate(words):
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row.append(f"0x{w:08x}")
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if len(row) == 8:
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lines.append(" " + ", ".join(row) + ",")
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row = []
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if row:
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lines.append(" " + ", ".join(row) + ",")
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lines.append("};")
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lines.append(
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f"static const size_t {array_name}_count = sizeof({array_name})/sizeof({array_name}[0]);"
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)
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lines.append("")
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out_path.write_text("\n".join(lines), encoding="utf-8")
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print(f"wrote {out_path.name} ({len(words)} words)")
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def compile_one(src: Path) -> Path:
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out = Path(str(src) + ".spv")
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glslc = shutil.which("glslc")
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glslang = shutil.which("glslangValidator")
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if glslc:
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cmd = [glslc, "-fshader-stage=comp", f"-I{SHADER_DIR}", str(src), "-o", str(out),
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"--target-env=vulkan1.2"]
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elif glslang:
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cmd = [glslang, "-V", "-S", "comp", f"-I{SHADER_DIR}", "--target-env", "vulkan1.2",
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str(src), "-o", str(out)]
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else:
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raise SystemExit("need glslc or glslangValidator on PATH (Vulkan SDK)")
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r = subprocess.run(cmd, capture_output=True, text=True)
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if r.returncode != 0:
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raise SystemExit(f"compile failed for {src.name}:\n{r.stderr or r.stdout or '(no output)'}")
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return out
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def main() -> int:
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for name, stage in SHADERS:
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src = SHADER_DIR / name
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if not src.is_file():
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raise SystemExit(f"missing {src}")
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spv = compile_one(src)
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array = f"{src.stem}_{stage}_spv"
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spv_to_inc(spv, array, SHADER_DIR / f"{src.stem}_{stage}_spv.inc")
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return 0
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if __name__ == "__main__":
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import shutil
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sys.exit(main())
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