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#!/usr/bin/env python3
# vim: set syntax=python ts=4 sw=4 sts=4 smarttab expandtab autoindent
DESCRIPTION = \
"Compile shader source code to a baked SPIR-V binary file."
EPILOG = \
"Applying a number of quirks and fixes to deal with drivers bugging out on certain" \
"SPIR-V instructions. Generate GLSL from spirv-opt-ified binary and recompile with" \
"that in order to have consistency between Nvidia and everyone else."
args = None
import subprocess
def glslc(src, src_is_a_filepath = True, emit_assembly = False):
incdirs = []
for i in args.incdirs:
incdirs.append('-I')
incdirs.append(i)
rr = subprocess.run([
"glslc",
f"--target-env={args.env}",
f"-std={args.std}",
f"-fshader-stage={args.stage}"] + incdirs +
["-g", "-O", "-o", "-",] + (["-S"] if emit_assembly else []) +
[(src if src_is_a_filepath else '-')],
stdout=subprocess.PIPE,
input = None if src_is_a_filepath else src)
return rr.returncode, rr.stdout
def spirv_opt(src, strip_debug = True):
rr = subprocess.run([
"spirv-opt",
'--preserve-bindings', '--preserve-spec-constants',
'--strip-nonsemantic', '--strip-reflect'
] + (['--strip-debug'] if strip_debug else []) + [
'--amd-ext-to-khr', '--workaround-1209',
f"--target-env={args.env}",
"-O", "-o", "-", "-" ],
stdout=subprocess.PIPE, input = src )
return rr.returncode, rr.stdout
def jfmt_glsl(src):
srclines = [b'']
for sl in [l for l in src.split(b'\n') if 0 < len(l)]:
if sl.startswith(b'#'):
srclines[-1] = sl
srclines.append(b'')
else:
srclines[-1] += b' ' + sl
srclines = [b' '.join(sl.split()) for sl in srclines]
return b'\n'.join(srclines)
def filter_spirv(spirv, filename='<stdin>'):
return b'\n'.join(
[l for l in spirv.split(b'\n') if not
(b'OpLine' in l or b'OpNoLine' in l)
]).replace(b'<stdin>', filename.encode())
def spirv_cross(src):
rr = subprocess.run([
"spirv-cross", '--no-es', '-'],
stdout=subprocess.PIPE, input = src )
return rr.returncode, rr.stdout
def spirv_dis(src):
rr = subprocess.run(["spirv-dis", "-o", "-", "-"],
stdout=subprocess.PIPE, input = src )
return rr.returncode, rr.stdout
def spirv_as(src, dstpath = None):
rr = subprocess.run(["spirv-as",
"--target-env", args.env,
"-o", ("-" if not dstpath else dstpath), "-"],
input = src )
return rr.returncode
def exit_on_error(ec):
import sys
if 0 != ec:
sys.exit(ec)
if __name__ == '__main__':
from argparse import ArgumentParser
ap = ArgumentParser(
prog = "shaderbake",
description = DESCRIPTION,
epilog = EPILOG )
ap.add_argument('input', default='-', nargs='?')
ap.add_argument('-I', '--add-include-directory', dest='incdirs', action='append', default=[])
ap.add_argument('-o', '--output', dest='output', default=None)
ap.add_argument('-s', '--std', dest='std', default='450core')
ap.add_argument('-e', '--environment', dest='env', default='opengl4.5')
ap.add_argument('-t', '--stage', dest='stage', default=None)
import sys
args = ap.parse_args(sys.argv[1:])
args.stripped_input = args.input[:-5] if args.input.lower().endswith('.glsl') else args.input
if not args.stage:
if args.stripped_input.lower().endswith('.cs'):
args.stage = 'comp'
if args.stripped_input.lower().endswith('.vs'):
args.stage = 'vert'
if args.stripped_input.lower().endswith('.tc'):
args.stage = 'tesc'
if args.stripped_input.lower().endswith('.gs'):
args.stage = 'geom'
if args.stripped_input.lower().endswith('.te'):
args.stage = 'tese'
if args.stripped_input.lower().endswith('.fs'):
args.stage = 'frag'
ec,sc = glslc(args.input)
exit_on_error(ec)
if True:
ec,sc = spirv_opt(sc, strip_debug=False)
exit_on_error(ec)
if True:
ec,sc = spirv_cross(sc)
exit_on_error(ec)
ec,sc = glslc(jfmt_glsl(sc), src_is_a_filepath=False, emit_assembly=False)
exit_on_error(ec)
ec,sc = spirv_opt(sc, strip_debug=False)
exit_on_error(ec)
if True:
ec,sc = spirv_dis(sc)
exit_on_error(ec)
ec = spirv_as(
filter_spirv(sc, args.stripped_input),
args.output)
exit_on_error(ec)
else:
with open(args.output, 'wb') if args.output else sys.stdout as output:
output.write(sc)
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