cuda-samples/Samples/5_Domain_Specific/simpleD3D12/Win32Application.cpp

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/*Includes code from DirectX-Graphics-Samples/Samples/Desktop/D3D12HelloWorld/src/HelloTexture,
  which is licensed as follows:

The MIT License (MIT)
    Copyright (c) 2015 Microsoft

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.
*/

#include "stdafx.h"
#include "Win32Application.h"

HWND Win32Application::m_hwnd = nullptr;

int Win32Application::Run(DX12CudaSample* pSample, HINSTANCE hInstance,
                          int nCmdShow) {
  // Parse the command line parameters
  int argc;
  LPWSTR* argv = CommandLineToArgvW(GetCommandLineW(), &argc);
  pSample->ParseCommandLineArgs(argv, argc);
  LocalFree(argv);

  // Initialize the window class.
  WNDCLASSEX windowClass = {0};
  windowClass.cbSize = sizeof(WNDCLASSEX);
  windowClass.style = CS_HREDRAW | CS_VREDRAW;
  windowClass.lpfnWndProc = WindowProc;
  windowClass.hInstance = hInstance;
  windowClass.hCursor = LoadCursor(NULL, IDC_ARROW);
  windowClass.lpszClassName = "DX12CudaSampleClass";
  RegisterClassEx(&windowClass);

  RECT windowRect = {0, 0, static_cast<LONG>(pSample->GetWidth()),
                     static_cast<LONG>(pSample->GetHeight())};
  AdjustWindowRect(&windowRect, WS_OVERLAPPEDWINDOW, FALSE);

  // Create the window and store a handle to it.
  m_hwnd = CreateWindow(windowClass.lpszClassName, pSample->GetTitle(),
                        WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
                        windowRect.right - windowRect.left,
                        windowRect.bottom - windowRect.top,
                        nullptr,  // We have no parent window.
                        nullptr,  // We aren't using menus.
                        hInstance, pSample);

  // Initialize the sample. OnInit is defined in each child-implementation of
  // DXSample.
  pSample->OnInit();

  ShowWindow(m_hwnd, nCmdShow);

  // Main sample loop.
  MSG msg = {};
  while (msg.message != WM_QUIT) {
    // Process any messages in the queue.
    if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
  }

  pSample->OnDestroy();

  // Return this part of the WM_QUIT message to Windows.
  return static_cast<char>(msg.wParam);
}

// Main message handler for the sample.
LRESULT CALLBACK Win32Application::WindowProc(HWND hWnd, UINT message,
                                              WPARAM wParam, LPARAM lParam) {
  DX12CudaSample* pSample =
      reinterpret_cast<DX12CudaSample*>(GetWindowLongPtr(hWnd, GWLP_USERDATA));

  switch (message) {
    case WM_CREATE: {
      // Save the DXSample* passed in to CreateWindow.
      LPCREATESTRUCT pCreateStruct = reinterpret_cast<LPCREATESTRUCT>(lParam);
      SetWindowLongPtr(
          hWnd, GWLP_USERDATA,
          reinterpret_cast<LONG_PTR>(pCreateStruct->lpCreateParams));
    }
      return 0;

    case WM_KEYDOWN:
      if (pSample) {
        pSample->OnKeyDown(static_cast<UINT8>(wParam));
      }
      return 0;

    case WM_KEYUP:
      if (pSample) {
        pSample->OnKeyUp(static_cast<UINT8>(wParam));
      }
      return 0;

    case WM_PAINT:
      if (pSample) {
        pSample->OnRender();
      }
      return 0;

    case WM_DESTROY:
      PostQuitMessage(0);
      return 0;
  }

  // Handle any messages the switch statement didn't.
  return DefWindowProc(hWnd, message, wParam, lParam);
}