#include <GL/glew.h>

class FullScreenQuad {
  private:
    unsigned int vao;

  public:
    FullScreenQuad();
    int getVAO() { return vao; }
};

FullScreenQuad::FullScreenQuad() {
    float quadVertices[] = {// vertex attributes for a quad that fills the
                            // entire screen in Normalized Device Coordinates.
                            // positions   // texCoords
                            -1.0f, 1.0f, 0.0f, 1.0f,  -1.0f, -1.0f,
                            0.0f,  0.0f, 1.0f, -1.0f, 1.0f,  0.0f,

                            -1.0f, 1.0f, 0.0f, 1.0f,  1.0f,  -1.0f,
                            1.0f,  0.0f, 1.0f, 1.0f,  1.0f,  1.0f};

    unsigned int vbo;
    glGenVertexArrays(1, &vao);
    glGenBuffers(1, &vbo);
    glBindVertexArray(vao);
    glBindBuffer(GL_ARRAY_BUFFER, vbo);
    glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices), &quadVertices,
                 GL_STATIC_DRAW);
    glEnableVertexAttribArray(0);
    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float),
                          (void *)0);
    glEnableVertexAttribArray(1);
    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float),
                          (void *)(2 * sizeof(float)));
}