# People's Video Editor: high quality, GPU accelerated mp4 editor
# Copyright (C) 2025 Roz K <roz@rozk.net>
#
# This file is part of People's Video Editor.
#
# People's Video Editor is free software: you can redistribute it and/or modify it under the terms of the
# GNU General Public License as published by the Free Software Foundation, either version 3 of the License,
# or (at your option) any later version.
#
# People's Video Editor is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with People's Video Editor.
# If not, see <https://www.gnu.org/licenses/>.

from . import libgl

class VertexBuffer:
    __slots__ = '_buffer', '_size'

    def __init__(self, size, channels, elems):
        self._buffer = libgl.create_vertex_buffer(size, channels, elems)
        self._size = size

    def __del__(self):
        libgl.delete_vertex_buffer(self._buffer)

    @property
    def size(self):
        return self._size

    def upload(self, mesh):
        assert (self._size >= mesh.size)
        return libgl.upload_vertex_buffer(self._buffer, mesh.views, mesh.size)