Add new VS AddIn examples

visual_studio/NativeClientVSAddIn/InstallerResources/examples/hello_nacl/hello_nacl/hello_nacl.c

+/* 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
+// What Changed: The platform launches Chrome, which will then load a Native
+// 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 in its own window.
+// Since WndProc spins in its message loop, the call to Instance_DidCreate
+// never returns.
+// Close the hello_nacl 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>/NaCl64/newlib/Debug/hello_nacl_64.nexe exists
+// - Copy the folder <project directory> 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
+
+
+#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
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/pp_module.h"
+#include "ppapi/c/pp_var.h"
+#include "ppapi/c/ppb.h"
+#include "ppapi/c/ppb_instance.h"
+#include "ppapi/c/ppb_messaging.h"
+#include "ppapi/c/ppb_var.h"
+#include "ppapi/c/ppb_core.h"
+#include "ppapi/c/ppp.h"
+#include "ppapi/c/ppp_instance.h"
+#include "ppapi/c/ppp_messaging.h"
+#include <string.h>
+
+// Native Client APIs
+static PPB_Messaging* ppb_messaging_interface = NULL;
+static PPB_Var* ppb_var_interface = NULL;
+static PPB_Core* ppb_core_interface = NULL;
+PP_Instance myInstance;
+
+int InitInstanceInPCWindow();
+void InitInstanceInBrowserWindow();
+
+#endif
+
+
+#ifdef STEP4
+// Implements message handling in a callback function.
+void HelloWorldCallback(void* user_data, int32_t result) {
+  MSG uMsg;
+  if (PeekMessage(&uMsg, NULL, 0, 0, PM_REMOVE)) {
+    TranslateMessage(&uMsg);
+    DispatchMessage(&uMsg);
+  }
+  ppb_core_interface->CallOnMainThread(100, HelloWorldCallback, 0);
+}
+
+struct PP_CompletionCallback HelloWorldCallback = { HelloWorldCallback, NULL };
+#endif
+
+#ifdef STEP2
+// The basic framework needed for all Native Client Modules.  Handles creation
+// of the module instance and initial handshake with the browser.
+/**
+ * Creates new string PP_Var from C string. Useful utility for
+ * message-handling.
+ */
+static struct PP_Var CStrToVar(const char* str) { if (ppb_var_interface !=
+NULL) { return ppb_var_interface->VarFromUtf8(str, strlen(str)); } return
+PP_MakeUndefined(); }
+
+
+void InitInstanceInBrowserWindow() {
+  // 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.
+  ppb_messaging_interface->PostMessage(myInstance,
+                                       CStrToVar("Hello, Native Client!"));
+}
+
+/**
+ * Called when the NaCl module is instantiated on the web page.
+ */
+static PP_Bool Instance_DidCreate(PP_Instance instance,
+                                  uint32_t argc,
+                                  const char* argn[],
+                                  const char* argv[]) {
+  myInstance = instance;
+  ppb_messaging_interface->PostMessage(instance,
+                                       CStrToVar("Start Instance_DidCreate"));
+#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
+
+  ppb_messaging_interface->PostMessage(instance,
+                                       CStrToVar("End Instance_DidCreate"));
+  return PP_TRUE;
+}
+
+/**
+ * Called when the NaCl module is destroyed.
+ */
+static void Instance_DidDestroy(PP_Instance instance) {
+}
+
+/**
+ * Called when the position, the size, or the clip rect of the element in the
+ * browser that corresponds to this NaCl module has changed.
+  */
+static void Instance_DidChangeView(PP_Instance instance,
+                                   PP_Resource view_resource) {
+}
+
+/**
+ * Notification that the given NaCl module has gained or lost focus.
+  */
+static void Instance_DidChangeFocus(PP_Instance instance,
+                                    PP_Bool has_focus) {
+}
+
+/**
+ * Handler that gets called after a full-frame module is instantiated based on
+ * registered MIME types.  This function is not called on NaCl modules.  This
+ * function is essentially a place-holder for the required function pointer in
+ * the PPP_Instance structure.
+  */
+static PP_Bool Instance_HandleDocumentLoad(PP_Instance instance,
+                                           PP_Resource url_loader) {
+  /* NaCl modules do not need to handle the document load function. */
+  return PP_FALSE;
+}
+
+/**
+ * Entry points for the module.
+ * Initialize needed interfaces: PPB_Core, PPB_Messaging and PPB_Var.
+ */
+PP_EXPORT int32_t PPP_InitializeModule(PP_Module a_module_id,
+                                       PPB_GetInterface get_browser) {
+  ppb_messaging_interface = (PPB_Messaging*)
+                            get_browser(PPB_MESSAGING_INTERFACE);
+  ppb_var_interface = (PPB_Var*)get_browser(PPB_VAR_INTERFACE);
+  ppb_core_interface = (PPB_Core*)get_browser(PPB_CORE_INTERFACE);
+  return PP_OK;
+}
+
+/**
+ * Returns an interface pointer for the interface of the given name, or NULL
+ * if the interface is not supported.
+  */
+PP_EXPORT const void* PPP_GetInterface(const char* interface_name) {
+  if (strcmp(interface_name, PPP_INSTANCE_INTERFACE) == 0) {
+    static PPP_Instance instance_interface = {
+      &Instance_DidCreate,
+      &Instance_DidDestroy,
+      &Instance_DidChangeView,
+      &Instance_DidChangeFocus,
+      &Instance_HandleDocumentLoad,
+    };
+    return &instance_interface;
+  }
+  return NULL;
+}
+
+/**
+ * Called before the plugin module is unloaded.
+ */
+PP_EXPORT void PPP_ShutdownModule() {
+}
+#endif
+
+// **** Application Code ****
+
+#ifdef STEP1
+// Desktop Windows Hello World app. Native Client agnostic.
+
+static TCHAR szWindowClass[] = _T("win32app");
+static TCHAR szTitle[] = _T("hello_nacl");
+HINSTANCE hInst;
+LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
+
+// WinMain
+int WINAPI WinMain(HINSTANCE hInstance,
+                   HINSTANCE hPrevInstance,
+                   LPSTR lpCmdLine,
+                   int nCmdShow) {
+  WNDCLASSEX wcex;
+  HWND hWnd;
+  MSG msg;
+
+  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"),
+               0);
+
+    return 1;
+  }
+
+  hInst = hInstance;
+
+  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"),
+               0);
+
+    return 1;
+  }
+
+  ShowWindow(hWnd, nCmdShow);
+  UpdateWindow(hWnd);
+
+  // Main message loop:
+
+  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);
+      TextOut(hdc, 5, 5, greeting, _tcslen(greeting));
+      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 Native Client Module can
+// launch the original application.  Note the inclusion of a message-handling
+// loop. STEP4 will replace the loop with a callback.
+HINSTANCE g_hInstance = NULL;
+HWND g_hWnd = NULL;
+
+int InitInstanceInPCWindow()

[binji, 2012/10/15 23:03:07]

brace on this line

+{
+  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"), 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.
+  ppb_core_interface->CallOnMainThread(100, HelloWorldCallback, 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