#ifndef SHADER_VARS_H
#define SHADER_VARS_H

#include "shader.h"

namespace shader {

  extern struct vin
  {
    static varying_3f position_3f;
    static varying_4f position_4f;
    static varying_3f normal_3f;
    static varying_3f color_3f;
    static varying_4f color_4f;
    static varying_3f color2_3f;
    static varying_4f color2_4f;
    static varying_1f psize_1f;
    static varying_1f texcoord_1f[8];
    static varying_2f texcoord_2f[8];
    static varying_3f texcoord_3f[8];
    static varying_4f texcoord_4f[8];

    static glvar position;
    static glvar normal;
  } vin;

  extern struct vout
  {
    // glstate builtin
    static glvar position;
    static glvar point_size;
    static glvar clip_vertex;

    // standard varying
    static glvar front_color;
    static glvar back_color;
    static glvar front_secondary_color;
    static glvar back_secondary_color;
    static glvar texcoord[8];
    static glvar fog_frag_coord;
  } vout;

  extern struct fin
  {
    // glstate builtin
    static glvar frag_coord;

    // standard varying
    static glvar color;
    static glvar secondary_color;
    static glvar texcoord[8];
    static glvar fog_frag_coord;
  } fin;

  extern struct fout
  {
    // glstate builtin
    static glvar frag_color;
    static glvar frag_depth;
    static glvar frag_data[2];
  } fout;

  // predefined globals
  extern struct gl {
    static uniform_matrix_4f model_view_matrix,
                             projection_matrix,
                             model_view_projection_matrix,
                             texture_matrix[8];
    static uniform_matrix_4f model_view_matrix_inverse,
                             projection_matrix_inverse,
                             model_view_projection_matrix_inverse,
                             texture_matrix_inverse[8];
    static uniform_matrix_4f model_view_matrix_transpose,
                             projection_matrix_transpose,
                             model_view_projection_matrix_transpose,
                             texture_matrix_transpose[8];
    static uniform_matrix_4f model_view_matrix_inverse_transpose,
                             projection_matrix_inverse_transpose,
                             model_view_projection_matrix_inverse_transpose,
                             texture_matrix_inverse_transpose[8];

    static uniform_matrix_3f normal_matrix;

    static uniform_1f normal_scale;
    static uniform_1f depth_range_near, depth_range_far, depth_range_diff;

    static uniform_4f clip_plane[2];//TODO

    // point parameters TODO

    static uniform_4f front_material_emission,
                      front_material_ambient,
                      front_material_diffuse,
                      front_material_specular,
                      front_material_shininess;
    static uniform_4f back_material_emission,
                      back_material_ambient,
                      back_material_diffuse,
                      back_material_specular,
                      back_material_shininess;

    // light source parameters TODO
    
    static uniform_4f light_model_ambient;
    static uniform_4f front_light_model_product_scene_color;
    static uniform_4f back_light_model_product_scene_color;

    // light products TODO
    // texture env and gen TODO
    // fogparameters TODO
    
    // shader output are in vout and fout
  } gl;

}

#endif