59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
# Copyright (C) 2022 RozK
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from pathlib import Path
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from engine import load_shader
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#TODO: preprocessing (at least includes)
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def _cleanup(line):
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return line.partition('//')[0].strip()
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def _filter(line):
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return line
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def _subst(line):
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if line.startswith('#include '):
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path = Path('.') / 'game' / 'shaders'
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lines = []
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for name in line.split()[1:]:
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lines.extend(_load_source(path / name.strip('"')))
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return lines
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return [line]
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def _load_source(_path):
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assert _path.exists()
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lines = filter(_filter, map(_cleanup, open(_path, 'rt')))
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source = []
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for line in lines:
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source.extend(_subst(line))
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return source
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def _convert(line):
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return bytes(line, 'utf-8') + b'\n'
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def load(vert_name, frag_name = ''):
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path = Path('.') / 'game' / 'shaders'
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if not frag_name:
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frag_name = vert_name
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print("Loading vertex shader", vert_name)
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vert_lines = list(map(_convert, _load_source(path / (vert_name + '_opengles.vert'))))
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assert vert_lines
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print("Loading fragment shader", frag_name)
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frag_lines = list(map(_convert, _load_source(path / (frag_name + '_opengles.frag'))))
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assert frag_lines
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return load_shader(vert_lines, frag_lines)
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