v4k-git-backup/engine/shaders/vs_0_2_fullscreen_quad_A.glsl

out vec2 texcoord;

void main() {
    texcoord = vec2( (gl_VertexID << 1) & 2, gl_VertexID & 2 );
    gl_Position = vec4( texCoord * 2.0 - 1.0, 0.0, 1.0 );
}