source/blender/draw/engines/workbench/shaders/workbench_data_lib.glsl


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struct LightData {
  vec4 direction;
  vec4 specular_color;
  vec4 diffuse_color_wrap; /* rgb: diffuse col a: wrapped lighting factor */
};

struct WorldData {
  vec4 background_color_low;
  vec4 background_color_high;
  vec4 object_outline_color;
  vec4 shadow_direction_vs;
  LightData lights[4];
  vec4 ambient_color;
  int num_lights;
  int matcap_orientation;
  float background_alpha;
  float curvature_ridge;
  float curvature_valley;
  float background_dither_factor;
  int pad[2];
};