#version 450

out VS_OUT
{
    vec2 uv;
} vs_out;

out gl_PerVertex
{
    vec4 gl_Position;
};

const vec2 g_positions[6] =
{
    { -1, -1 },
    { 1, -1 },
    { 1, 1 },

    { 1, 1 },
    { -1, 1 },
    { -1, -1 }
};

const vec2 g_uv[6] =
{
    { 0, 0 },
    { 1, 0 },
    { 1, 1 },

    { 1, 1 },
    { 0, 1 },
    { 0, 0 }
};

void main()
{
    vs_out.uv = g_uv[gl_VertexIndex];
    gl_Position = vec4(g_positions[gl_VertexIndex], 0, 1);
}