vertex.glsl

/*
 * Copyright (C) 2023 Mikhail Burakov. This file is part of streamer.
 *
 * streamer 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.
 *
 * streamer 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 streamer.  If not, see <https://www.gnu.org/licenses/>.
 */

attribute vec2 position;

varying vec2 texcoord;

void main() {
  texcoord = position;
  mat4 transform_matrix =
      mat4(vec4(2.0, 0.0, 0.0, 0.0), vec4(0.0, 2.0, 0.0, 0.0),
           vec4(0.0, 0.0, 2.0, 0.0), vec4(-1.0, -1.0, 0.0, 1.0));
  gl_Position = transform_matrix * vec4(position, 0.0, 1.0);
}