cefclient:

- Add the User Interface App Example that demonstrates two-way JavaScript communication between the page and an embedded plugin implemented using OpenGL.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@40 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tests/cefclient/uiplugin.cpp

@@ -0,0 +1,284 @@
+// Copyright (c) 2009 The Chromium Embedded Framework Authors.
+// Portions copyright (c) 2006-2008 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.
+
+#include "stdafx.h"
+#include "uiplugin.h"
+#include "cefclient.h"
+#include <gl/gl.h>
+#include <sstream>
+
+
+// Initialized in NP_Initialize.
+NPNetscapeFuncs* g_uibrowser = NULL;
+
+// Global values.
+float g_rotationspeed = 0.0f;
+float g_theta = 0.0f;
+
+// Class holding pointers for the client plugin window.
+class ClientPlugin
+{
+public:
+  ClientPlugin()
+  {
+    hWnd = NULL;
+    hDC = NULL;
+    hRC = NULL;
+  }
+
+  HWND hWnd;
+  HDC hDC;
+  HGLRC hRC;
+};
+
+// Forward declarations of functions included in this code module:
+LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT message, WPARAM wParam,
+                               LPARAM lParam);
+void EnableOpenGL(HWND hWnd, HDC * hDC, HGLRC * hRC);
+void DisableOpenGL(HWND hWnd, HDC hDC, HGLRC hRC);
+
+static
+NPError NPP_New(NPMIMEType plugin_type, NPP instance, uint16 mode, int16 argc,
+                char* argn[], char* argv[], NPSavedData* saved) {
+  if (instance == NULL)
+    return NPERR_INVALID_INSTANCE_ERROR;
+
+  ClientPlugin *plugin = new ClientPlugin;
+  instance->pdata = reinterpret_cast<void*>(plugin);
+
+  return NPERR_NO_ERROR;
+}
+
+static
+NPError NPP_Destroy(NPP instance, NPSavedData** save) {
+  ClientPlugin *plugin = reinterpret_cast<ClientPlugin*>(instance->pdata);
+  
+  if (plugin) {
+    if(plugin->hWnd) {
+      DestroyWindow(plugin->hWnd);
+      DisableOpenGL(plugin->hWnd, plugin->hDC, plugin->hRC);
+    }
+    delete plugin;
+    g_rotationspeed = 0.0f;
+    g_theta = 0.0f;
+  }
+
+  return NPERR_NO_ERROR;
+}
+
+static
+NPError NPP_SetWindow(NPP instance, NPWindow* window_info) {
+  if (instance == NULL)
+    return NPERR_INVALID_INSTANCE_ERROR;
+
+  if (window_info == NULL)
+    return NPERR_GENERIC_ERROR;
+
+  ClientPlugin *plugin = reinterpret_cast<ClientPlugin*>(instance->pdata);
+  HWND parent_hwnd = reinterpret_cast<HWND>(window_info->window);
+  
+  if (plugin->hWnd == NULL)
+  {
+    WNDCLASS wc;
+    HINSTANCE hInstance = GetModuleHandle(NULL);
+    
+    // Register the window class.
+    wc.style = CS_OWNDC;
+    wc.lpfnWndProc = PluginWndProc;
+    wc.cbClsExtra = 0;
+    wc.cbWndExtra = 0;
+    wc.hInstance = hInstance;
+    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
+    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+    wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
+    wc.lpszMenuName = NULL;
+    wc.lpszClassName = L"ClientUIPlugin";
+    RegisterClass(&wc);
+  
+    // Create the main window.
+    plugin->hWnd = CreateWindow(L"ClientUIPlugin", L"Client UI Plugin",
+        WS_CHILD, 0, 0, 0, 0, parent_hwnd, NULL, hInstance, NULL);
+    
+    // Enable OpenGL drawing for the window.
+    EnableOpenGL(plugin->hWnd, &(plugin->hDC), &(plugin->hRC));
+  }
+
+  // Position the window and make sure it's visible.
+  RECT parent_rect;
+  GetClientRect(parent_hwnd, &parent_rect);
+  SetWindowPos(plugin->hWnd, NULL, parent_rect.left, parent_rect.top,
+      parent_rect.right - parent_rect.left,
+      parent_rect.bottom - parent_rect.top, SWP_SHOWWINDOW);
+
+  UpdateWindow(plugin->hWnd);
+  ShowWindow(plugin->hWnd, SW_SHOW);
+
+  return NPERR_NO_ERROR;
+}
+
+NPError API_CALL NP_UIGetEntryPoints(NPPluginFuncs* pFuncs)
+{
+  pFuncs->newp = NPP_New;
+  pFuncs->destroy = NPP_Destroy;
+  pFuncs->setwindow = NPP_SetWindow;
+  return NPERR_NO_ERROR;
+}
+
+NPError API_CALL NP_UIInitialize(NPNetscapeFuncs* pFuncs)
+{
+  g_uibrowser = pFuncs;
+  return NPERR_NO_ERROR;
+}
+
+NPError API_CALL NP_UIShutdown(void)
+{
+  g_uibrowser = NULL;
+  return NPERR_NO_ERROR;
+}
+
+// Send the notification to the browser as a JavaScript function call.
+static void NotifyNewRotation(float value)
+{
+  std::wstringstream buf;
+  buf << L"notifyNewRotation(" << value << L");";
+  AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(buf.str(), std::wstring(),
+      0);
+}
+
+void ModifyRotation(float value)
+{
+  g_rotationspeed += value;
+  NotifyNewRotation(g_rotationspeed);
+}
+
+void ResetRotation()
+{
+  g_rotationspeed = 0.0;
+  NotifyNewRotation(g_rotationspeed);
+}
+
+// Nice little fly polygon borrowed from the OpenGL Red Book.
+const GLubyte fly[] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x03, 0x80, 0x01, 0xC0, 0x06, 0xC0, 0x03, 0x60, 
+    0x04, 0x60, 0x06, 0x20, 0x04, 0x30, 0x0C, 0x20, 
+    0x04, 0x18, 0x18, 0x20, 0x04, 0x0C, 0x30, 0x20,
+    0x04, 0x06, 0x60, 0x20, 0x44, 0x03, 0xC0, 0x22, 
+    0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 
+    0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22,
+    0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 
+    0x66, 0x01, 0x80, 0x66, 0x33, 0x01, 0x80, 0xCC, 
+    0x19, 0x81, 0x81, 0x98, 0x0C, 0xC1, 0x83, 0x30,
+    0x07, 0xe1, 0x87, 0xe0, 0x03, 0x3f, 0xfc, 0xc0, 
+    0x03, 0x31, 0x8c, 0xc0, 0x03, 0x33, 0xcc, 0xc0, 
+    0x06, 0x64, 0x26, 0x60, 0x0c, 0xcc, 0x33, 0x30,
+    0x18, 0xcc, 0x33, 0x18, 0x10, 0xc4, 0x23, 0x08, 
+    0x10, 0x63, 0xC6, 0x08, 0x10, 0x30, 0x0c, 0x08, 
+    0x10, 0x18, 0x18, 0x08, 0x10, 0x00, 0x00, 0x08};
+
+
+// Plugin window procedure.
+LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT message, WPARAM wParam,
+                               LPARAM lParam)
+{
+  HDC hDC;
+  int width, height;
+  
+  switch(message)
+  {
+  case WM_CREATE:
+    // Start the timer that's used for redrawing.
+    SetTimer(hWnd, 1, 1, NULL);
+    return 0;
+    
+  case WM_DESTROY:
+    // Stop the timer that's used for redrawing.
+    KillTimer(hWnd, 1);
+    return 0;
+    
+  case WM_LBUTTONDOWN:
+    // Decrement rotation speed.
+    ModifyRotation(-2.0f);
+    return 0;
+
+  case WM_RBUTTONDOWN:
+    // Increment rotation speed.
+    ModifyRotation(2.0f);
+    return 0;
+
+  case WM_SIZE:
+    // Resize the OpenGL viewport to match the window size.
+    width = LOWORD(lParam);
+    height = HIWORD(lParam);
+    glViewport(0, 0, width, height);
+    break;
+
+  case WM_ERASEBKGND:
+    return 0;
+
+  case WM_TIMER:
+    // Adjust the theta value and redraw the display when the timer fires.
+    hDC = GetDC(hWnd);
+      
+    glClearColor(1.0f, 1.0f, 1.0f, 0.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+    
+    glPushMatrix();
+    glEnable(GL_POLYGON_STIPPLE);
+    glPolygonStipple(fly);
+
+    glRotatef(g_theta, 0.0f, 0.0f, 1.0f);
+    glBegin(GL_QUADS);
+    glColor3f(1.0f, 0.0f, 0.0f); glVertex2f(0.7f, 0.7f);
+    glColor3f(0.0f, 1.0f, 0.0f); glVertex2f(0.7f, -0.7f);
+    glColor3f(0.0f, 0.0f, 1.0f); glVertex2f(-0.7f, -0.7f);
+    glColor3f(1.0f, 0.0f, 1.0f); glVertex2f(-0.7f, 0.7f);
+    glEnd();
+
+    glDisable(GL_POLYGON_STIPPLE);
+    glPopMatrix();
+    
+    SwapBuffers(hDC);
+    ReleaseDC(hWnd, hDC);
+    
+    g_theta -= g_rotationspeed;
+  }
+
+  return DefWindowProc(hWnd, message, wParam, lParam);
+}
+
+// Enable OpenGL.
+void EnableOpenGL(HWND hWnd, HDC * hDC, HGLRC * hRC)
+{
+  PIXELFORMATDESCRIPTOR pfd;
+  int format;
+  
+  // Get the device context.
+  *hDC = GetDC(hWnd);
+  
+  // Set the pixel format for the DC.
+  ZeroMemory(&pfd, sizeof(pfd));
+  pfd.nSize = sizeof(pfd);
+  pfd.nVersion = 1;
+  pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+  pfd.iPixelType = PFD_TYPE_RGBA;
+  pfd.cColorBits = 24;
+  pfd.cDepthBits = 16;
+  pfd.iLayerType = PFD_MAIN_PLANE;
+  format = ChoosePixelFormat(*hDC, &pfd);
+  SetPixelFormat(*hDC, format, &pfd);
+  
+  // Create and enable the render contex.
+  *hRC = wglCreateContext(*hDC);
+  wglMakeCurrent(*hDC, *hRC);
+}
+
+// Disable OpenGL.
+void DisableOpenGL(HWND hWnd, HDC hDC, HGLRC hRC)
+{
+  wglMakeCurrent(NULL, NULL);
+  wglDeleteContext(hRC);
+  ReleaseDC(hWnd, hDC);
+}