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visual_studio/NativeClientVSAddIn/InstallerResources/examples/hello_nacl_cpp/hello_nacl_cpp/hello_nacl_cpp.cpp

-// This project demonstrates how to migrate a Windows desktop app to Native
-// Client, running first as a Win32 application (define STEP1), then as a PPAPI
-// plugin (define STEP2 through STEP6), and finally as a Native Client module.
-
-// Start with STEP1 defined and the defines for STEP2 through STEP6 commented
-// out.  For each step in the process, un-comment the next #define, leaving the
-// previous ones on.  Ready, set, port!
-
-// *** SELECT THE WIN32 PLATFORM AND RUN WITH #define STEP1 ONLY ***
-
-#define STEP1
-// Launches the original Windows desktop application, Hello World, which runs
-// as WinMain.  STEP1 encloses Windows-specific functions that are used with
-// the WIN32 and PPAPI platforms.  These will be removed when the full PPAPI
-// port is finished (STEP6)
-
-// *** SELECT THE PPAPI PLATFORM ***
-
-#define STEP2
-
-// Client Module.  STEP2 encloses the Native Client module APIs needed to link
-// any app to the browser.  The module does nothing except report
-// starting/ending the function Instance_DidCreate.  The Windows app does not
-// run because it is not being called.
-
-#define STEP3
-// What changed: Replace WinMain with WndProc, and call it from
-// Instance_DidCreate, launching hello_nacl_plus in its own window. Since
-// WndProc spins in its message loop, the call to Instance_DidCreate never
-// returns. Close the hello_nacl_plus window and the module initialization will
-// finish.
-
-#define STEP4
-// What changed: In WndProc replace the message loop with a callback function.
-// Now the app window and the Native Client module are running concurrently.
-
-#define STEP5
-// What changed: Instance_DidCreate calls initInstanceInBrowserWindow rather
-// than initInstanceInPCWindow. The initInstanceInBrowserWindow uses
-// postMessage to place text (now "Hello, Native Client") in the web page
-// instead of opening and writing to a window.
-
-#define STEP6
-// What changed: All the Windows code is def'd out, to prove we are
-// PPAPI-compliant.  The functional code that is running is the same as STEP5.
-
-// *** SELECT THE NACL64 PLATFORM AND RUN ***
-
-// What changed: The code is the same as STEP6, but you are using the SDK
-// toolchain to compile it into a nexe.  The module is now running as a real
-// Native Client executable in a NaCl sandbox, with nacl-gdb attached.
-
-// *** RUN YOUR MODULE IN THE WILD ***
-// You can run your nexe outside of Visual Studio, directly from Chrome by
-// following these steps:
-// - Build STEP6 and verify the file
-//   <project directory>/newlib/hello_nacl_plus/hello_nacl_plus.nexe exists
-// - Copy the folder <project directory>/hello_nacl_plus into your NaCl SDK's
-//   example directory.
-// - Go to the NaCl SDK directory and launch the httpd.py server.
-// - Launch Chrome, go to about:flags and enable the Native Client flag and
-//   relaunch Chrome
-// - Point Chrome at localhost:5103/hello_nacl_plus
-
-#ifdef STEP6
-// remove Windows-dependent code.
-#undef STEP1
-#undef STEP3
-#undef STEP4
-#define NULL 0
-#else
-// includes for Windows APIs.
-#include <windows.h>
-#include <stdlib.h>
-#include <tchar.h>
-#endif
-
-#ifdef STEP2
-// includes for PPAPI C++
-#include "ppapi/cpp/instance.h"
-#include "ppapi/cpp/module.h"
-#include "ppapi/cpp/var.h"
-#include "ppapi/cpp/core.h"
-#include "ppapi/cpp/completion_callback.h"
-#include "ppapi/utility/completion_callback_factory.h"
-
-// This is a known PPAPI platform problem (Issue 81375).
-// When WinUser.h is included it defines PostMessage, so we undef it here.
-// There is a work-around:
-#ifdef PostMessage
-#undef PostMessage
-#endif
-
-class NaClProjectInstance *myInstance;
-int initInstanceInPCWindow();
-void initInstanceInBrowserWindow();
-
-#endif
-
-#ifdef STEP2
-
-// **** Native Client Framework ****
-
-// The Instance class.
-class NaClProjectInstance : public pp::Instance {
-public:
-  pp::CompletionCallbackFactory<NaClProjectInstance> factory_;
-
-  explicit NaClProjectInstance(PP_Instance instance)
-    : pp::Instance(instance),
-    // Use this macro to eliminate compiler warning.
-    PP_ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)) {
-      myInstance = this;
-  }
-
-
-  virtual ~NaClProjectInstance() {
-  }
-
-  virtual bool Init(uint32_t /*argc*/, const char* /*argn*/[],
-    const char* /*argv*/[]) {
-      PostMessage(pp::Var("Creating Instance Start"));
-#ifdef STEP5
-      // Will be included in STEP5 and STEP6
-      // Uses messaging to relay text to the module's view on the web page
-      initInstanceInBrowserWindow();
-#else
-#ifdef STEP3
-      // Will be included in STEP3 and STEP4 only
-      // Uses WndProc to place text in a window separate from the browser.
-      initInstanceInPCWindow();
-#endif
-#endif
-      PostMessage(pp::Var("Creating Instance End"));
-      return true;
-  }
-
-#ifdef STEP4
-  // Implements Windows window message loop with a callback function.
-  void NaClProjectInstance::SendCallback(int result) {
-    pp::Core* core = pp::Module::Get()->core();
-    CompletionCallback callback = factory_.NewCallback(&HandleWindowMsg);
-    core->CallOnMainThread(100, callbacl, result);
-  }
-
-  void HandleWindowMsg(int32_t result) {
-    MSG uMsg;
-    if (PeekMessage(&uMsg, NULL, 0, 0, PM_REMOVE)) {
-      TranslateMessage(&uMsg);
-      DispatchMessage(&uMsg);
-    }
-    SendCallback(0);
-  }
-
-#endif
-private:
-  virtual void HandleMessage(const pp::Var& var_message) {
-  }
-};
-
-// The Module class.
-class NaClProjectModule : public pp::Module {
-public:
-  NaClProjectModule() : pp::Module() {}
-  virtual ~NaClProjectModule() {}
-
-  virtual pp::Instance* CreateInstance(PP_Instance instance) {
-    return new NaClProjectInstance(instance);
-  }
-};
-
-namespace pp {
-  Module* CreateModule() {
-    return new NaClProjectModule();
-  }
-}
-
-#endif
-
-// **** Application Code ****
-
-#ifdef STEP1
-// Desktop Windows Hello World app. Native Client agnostic.
-
-static TCHAR szWindowClass[] = _T("win32app");
-static TCHAR szTitle[] = _T("hello_nacl_plus");
-HINSTANCE hInst;
-LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
-
-// WinMain
-int WINAPI WinMain(HINSTANCE hInstance,
-  HINSTANCE hPrevInstance,
-  LPSTR lpCmdLine,
-  int nCmdShow)
-{
-  WNDCLASSEX wcex;
-
-  wcex.cbSize = sizeof(WNDCLASSEX);
-  wcex.style          = CS_HREDRAW | CS_VREDRAW;
-  wcex.lpfnWndProc    = WndProc;
-  wcex.cbClsExtra     = 0;
-  wcex.cbWndExtra     = 0;
-  wcex.hInstance      = hInstance;
-  wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
-  wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
-  wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
-  wcex.lpszMenuName   = NULL;
-  wcex.lpszClassName  = szWindowClass;
-  wcex.hIconSm        = LoadIcon(wcex.hInstance,
-                                 MAKEINTRESOURCE(IDI_APPLICATION));
-
-  if (!RegisterClassEx(&wcex)) {
-    MessageBox(NULL,
-      _T("Call to RegisterClassEx failed!"),
-      _T("hello_nacl_plus"),
-      NULL);
-
-    return 1;
-  }
-
-  hInst = hInstance;
-
-  HWND hWnd = CreateWindow(
-    szWindowClass,
-    szTitle,
-    WS_OVERLAPPEDWINDOW,
-    CW_USEDEFAULT, CW_USEDEFAULT,
-    500, 100,
-    NULL,
-    NULL,
-    hInstance,
-    NULL);
-
-  if (!hWnd) {
-    MessageBox(NULL,
-      _T("Call to CreateWindow failed!"),
-      _T("hello_nacl_plus"),
-      NULL);
-
-    return 1;
-  }
-
-  ShowWindow(hWnd,
-    nCmdShow);
-  UpdateWindow(hWnd);
-
-  // Main message loop:
-  MSG msg;
-  while (GetMessage(&msg, NULL, 0, 0)) {
-    TranslateMessage(&msg);
-    DispatchMessage(&msg);
-  }
-
-  return (int) msg.wParam;
-}
-
-//  WndProc
-LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
-{
-  PAINTSTRUCT ps;
-  HDC hdc;
-  TCHAR greeting[] = _T("Hello, World!");
-
-  switch (message)
-  {
-  case WM_PAINT:
-    hdc = BeginPaint(hWnd, &ps);
-
-    // Here your application is laid out.
-    // For this introduction, we just print out "Hello, World!"
-    // in the top left corner.
-    TextOut(hdc,
-      5, 5,
-      greeting, _tcslen(greeting));
-    // End application-specific layout section.
-
-    EndPaint(hWnd, &ps);
-    break;
-  case WM_DESTROY:
-    PostQuitMessage(0);
-    break;
-  default:
-    return DefWindowProc(hWnd, message, wParam, lParam);
-    break;
-  }
-
-  return 0;
-}
-#endif
-
-#ifdef STEP3
-// Replace WinMain with initInstanceInPCWindow so the NativeClient Module can
-// launch the original application.
-// Note the inclusion of a message-handling loop. STEP4 will replace the loop
-// with a callback.
-
-void shutDown(void);
-HINSTANCE g_hInstance = NULL;
-HWND g_hWnd = NULL;
-
-int initInstanceInPCWindow()
-{
-  WNDCLASSEX winClass;
-  MSG        uMsg;
-
-  memset(&uMsg,0,sizeof(uMsg));
-
-  winClass.lpszClassName = _T("MY_WINDOWS_CLASS");
-  winClass.cbSize        = sizeof(WNDCLASSEX);
-  winClass.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
-  winClass.lpfnWndProc   = WndProc;
-  winClass.hInstance     = g_hInstance;
-  winClass.hIcon         = NULL;
-  winClass.hIconSm     =  NULL;
-  winClass.hCursor       = LoadCursor(NULL, IDC_ARROW);
-  winClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
-  winClass.lpszMenuName  = NULL;
-  winClass.cbClsExtra    = 0;
-  winClass.cbWndExtra    = 0;
-
-  if (!RegisterClassEx(&winClass))
-    return E_FAIL;
-
-  g_hWnd = CreateWindowEx(NULL,_T("MY_WINDOWS_CLASS"),
-    _T("hello_nacl_plus"),
-    WS_OVERLAPPEDWINDOW,
-    0,0, 640, 480, NULL, NULL, g_hInstance, NULL);
-
-  if (g_hWnd == NULL)
-    return E_FAIL;
-
-  ShowWindow(g_hWnd, 1);
-
-  UpdateWindow(g_hWnd);
-
-#ifdef STEP4
-  // Skip the message loop, schedule a callback instead to periodically check
-  // for messages. Here we schedule at 100ms intervals.
-  myInstance->SendCallback(0);
-  return 0;
-#else
-  // Main message loop, Windows style.
-  while(uMsg.message != WM_QUIT) {
-    if (PeekMessage(&uMsg, NULL, 0, 0, PM_REMOVE)) {
-      TranslateMessage(&uMsg);
-      DispatchMessage(&uMsg);
-    }
-  }
-  return uMsg.wParam;
-#endif
-
-}
-#endif
-
-#ifdef STEP5
-// Pass the text to the browser page, there is no separate app window anymore.
-// The text is added as a new element to the page, it does not appear in the
-// module's embed view.
-void initInstanceInBrowserWindow() {
-  myInstance->PostMessage(pp::Var("Hello, Native Client!"));
-}
-#endif