//
//  shader.cpp
//  graphics
//
//  Created by Sam Jaffe on 7/5/16.
//

#include "game/graphics/shader.hpp"

#include <unordered_map>

#include "game/util/hash.hpp"
#include "helper.hpp"

using namespace graphics;

namespace {
  using key_t = std::pair<shaders::type, std::string>;
  std::unordered_map<key_t, flyweight<shader>> g_shaders;
}

flyweight<shader> shader::create(shaders::type tp, std::string const & path) {
  auto key = std::make_pair(tp, path);
  auto found = g_shaders.find(key);
  if (found != g_shaders.end()) { return found->second; }

  auto id = shaders::init(tp, path);
  flyweight<shader> fly{id, {id, tp, path}};
  return g_shaders.emplace(key, fly).first->second;
}

shader::shader(unsigned int id, shaders::type type, std::string const & path)
    : identity<shader>(id), type(type), path(path) {}