Add new VS AddIn examples

visual_studio/NativeClientVSAddIn/InstallerResources/examples/hello_nacl_cpp/hello_nacl_cpp/hello_nacl_cpp.cc

+/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// 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:
+  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();
+    core->CallOnMainThread(
+        100,
+        factory_.NewCallback(&NaClProjectInstance::HandleWindowMsg),
+        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) {
+  }
+
+  pp::CompletionCallbackFactory<NaClProjectInstance> factory_;
+};
+
+// 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)

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+{
+  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)

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+{
+  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