#include "Render/DX9/D3DX9Runtime.h"

#include <system_error>

D3DX9Runtime::D3DX9Runtime() : m_module(LoadLibraryA("D3DX9_43.dll")) {

  if (!this->m_module) {
    throw std::system_error(GetLastError(), std::system_category(), "D3DX9_43.dll");
  }

  this->filterTexture = reinterpret_cast<decltype(this->filterTexture)>(GetProcAddress(this->m_module, "D3DXFilterTexture"));
  this->loadSurfaceFromMemory = reinterpret_cast<decltype(this->loadSurfaceFromMemory)>(GetProcAddress(this->m_module, "D3DXLoadSurfaceFromMemory"));
  this->loadSurfaceFromSurface = reinterpret_cast<decltype(this->loadSurfaceFromSurface)>(GetProcAddress(this->m_module, "D3DXLoadSurfaceFromSurface"));
  this->perspectiveFovLH = reinterpret_cast<decltype(this->perspectiveFovLH)>(GetProcAddress(this->m_module, "D3DXMatrixPerspectiveFovLH"));
  this->saveSurfaceToFileA = reinterpret_cast<decltype(this->saveSurfaceToFileA)>(GetProcAddress(this->m_module, "D3DXSaveSurfaceToFileA"));

  if (!this->filterTexture || !this->loadSurfaceFromMemory || !this->loadSurfaceFromSurface || !this->perspectiveFovLH || !this->saveSurfaceToFileA) {
    FreeLibrary(this->m_module);
    throw std::system_error(ERROR_PROC_NOT_FOUND, std::system_category(), "D3DX9_43 exports");
  }
}

D3DX9Runtime::~D3DX9Runtime() {
  FreeLibrary(this->m_module);
}