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cef/tests/cefclient/osrplugin.cpp

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// Copyright (c) 2011 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 "osrplugin.h"
#include "cefclient.h"
#include "string_util.h"
#include <gl/gl.h>
#include <gl/glu.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include <sstream>
#ifdef _WIN32
// Initialized in NP_Initialize.
NPNetscapeFuncs* g_osrbrowser = NULL;
namespace {
GLuint g_textureID = -1;
float g_spinX = 0.0f;
float g_spinY = 0.0f;
int g_width = -1, g_height = -1;
CefRefPtr<CefBrowser> g_offscreenBrowser;
// Class holding pointers for the client plugin window.
class ClientPlugin
{
public:
ClientPlugin()
{
hWnd = NULL;
hDC = NULL;
hRC = NULL;
}
HWND hWnd;
HDC hDC;
HGLRC hRC;
};
// Handler for off-screen rendering windows.
class ClientOSRHandler : public ClientHandler
{
public:
ClientOSRHandler(ClientPlugin* plugin)
: plugin_(plugin), view_buffer_(NULL), view_buffer_size_(0),
popup_buffer_(NULL), popup_buffer_size_(0)
{
}
virtual ~ClientOSRHandler()
{
if (view_buffer_)
delete [] view_buffer_;
if (popup_buffer_)
delete [] popup_buffer_;
}
virtual RetVal HandleBeforeCreated(CefRefPtr<CefBrowser> parentBrowser,
CefWindowInfo& createInfo, bool popup,
const CefPopupFeatures& popupFeatures,
CefRefPtr<CefHandler>& handler,
CefString& url,
CefBrowserSettings& settings)
{
REQUIRE_UI_THREAD();
// Popups will be redirected to this browser window.
if(popup) {
createInfo.m_bWindowRenderingDisabled = TRUE;
handler = new ClientPopupHandler(g_offscreenBrowser);
}
return RV_CONTINUE;
}
virtual RetVal HandleAfterCreated(CefRefPtr<CefBrowser> browser)
{
REQUIRE_UI_THREAD();
// Set the view size to match the plugin window size.
browser->SetSize(PET_VIEW, g_width, g_height);
g_offscreenBrowser = browser;
return ClientHandler::HandleAfterCreated(browser);
}
virtual RetVal HandleAddressChange(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const CefString& url)
{
REQUIRE_UI_THREAD();
// Set the "url" value in the HTML.
std::stringstream ss;
std::string urlStr = url;
StringReplace(urlStr, "'", "\\'");
ss << "document.getElementById('url').value = '" << urlStr.c_str() << "'";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
return RV_CONTINUE;
}
virtual RetVal HandleTitleChange(CefRefPtr<CefBrowser> browser,
const CefString& title)
{
REQUIRE_UI_THREAD();
// Set the "title" value in the HTML.
std::stringstream ss;
std::string titleStr = title;
StringReplace(titleStr, "'", "\\'");
ss << "document.getElementById('title').innerHTML = '" <<
titleStr.c_str() << "'";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
return RV_CONTINUE;
}
virtual RetVal HandleGetRect(CefRefPtr<CefBrowser> browser, bool screen,
CefRect& rect)
{
REQUIRE_UI_THREAD();
// The simulated screen and view rectangle are the same. This is necessary
// for popup menus to be located and sized inside the view.
rect.x = rect.y = 0;
rect.width = g_width;
rect.height = g_height;
return RV_CONTINUE;
}
virtual RetVal HandleGetScreenPoint(CefRefPtr<CefBrowser> browser,
int viewX, int viewY, int& screenX,
int& screenY)
{
REQUIRE_UI_THREAD();
// Convert the point from view coordinates to actual screen coordinates.
POINT screen_pt = {viewX, viewY};
MapWindowPoints(plugin_->hWnd, HWND_DESKTOP, &screen_pt, 1);
screenX = screen_pt.x;
screenY = screen_pt.y;
return RV_CONTINUE;
}
virtual RetVal HandlePopupChange(CefRefPtr<CefBrowser> browser, bool show,
const CefRect& rect)
{
REQUIRE_UI_THREAD();
if (show && rect.width > 0) {
// Update the popup rectange. It will always be inside the view due to
// HandleGetRect().
ASSERT(rect.x + rect.width < g_width &&
rect.y + rect.height < g_height);
popup_rect_ = rect;
} else if(!show) {
// Clear the popup buffer.
popup_rect_.set(0,0,0,0);
if (popup_buffer_) {
delete [] popup_buffer_;
popup_buffer_ = NULL;
popup_buffer_size_ = 0;
}
}
return RV_CONTINUE;
}
virtual RetVal HandlePaint(CefRefPtr<CefBrowser> browser,
PaintElementType type, const CefRect& dirtyRect,
const void* buffer)
{
REQUIRE_UI_THREAD();
wglMakeCurrent(plugin_->hDC, plugin_->hRC);
glBindTexture(GL_TEXTURE_2D, g_textureID);
if (type == PET_VIEW) {
// Paint the view.
SetRGB(buffer, g_width, g_height, true);
// Update the whole texture. This is done for simplicity instead of
// updating just the dirty region.
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, g_width, g_height, GL_RGB,
GL_UNSIGNED_BYTE, view_buffer_);
}
if(popup_rect_.width > 0) {
if (type == PET_POPUP) {
// Paint the popup.
SetRGB(buffer, popup_rect_.width, popup_rect_.height, false);
}
if (popup_buffer_) {
// Update the popup region.
glTexSubImage2D(GL_TEXTURE_2D, 0, popup_rect_.x,
g_height-popup_rect_.y-popup_rect_.height, popup_rect_.width,
popup_rect_.height, GL_RGB, GL_UNSIGNED_BYTE, popup_buffer_);
}
}
return RV_CONTINUE;
}
virtual RetVal HandleCursorChange(CefRefPtr<CefBrowser> browser,
CefCursorHandle cursor)
{
REQUIRE_UI_THREAD();
// Change the plugin window's cursor.
SetClassLong(plugin_->hWnd, GCL_HCURSOR,
static_cast<LONG>(reinterpret_cast<LONG_PTR>(cursor)));
SetCursor(cursor);
return RV_CONTINUE;
}
protected:
virtual void SetLoading(bool isLoading)
{
// Set the "stop" and "reload" button state in the HTML.
std::stringstream ss;
ss << "document.getElementById('stop').disabled = "
<< (isLoading?"false":"true") << ";"
<< "document.getElementById('reload').disabled = "
<< (isLoading?"true":"false") << ";";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
}
virtual void SetNavState(bool canGoBack, bool canGoForward)
{
// Set the "back" and "forward" button state in the HTML.
std::stringstream ss;
ss << "document.getElementById('back').disabled = "
<< (canGoBack?"false":"true") << ";";
ss << "document.getElementById('forward').disabled = "
<< (canGoForward?"false":"true") << ";";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
}
// Set the contents of the RGB buffer.
void SetRGB(const void* src, int width, int height, bool view)
{
SetBufferSize(width, height, view);
ConvertToRGB((unsigned char*)src, view?view_buffer_:popup_buffer_, width,
height);
}
// Size the RGB buffer.
void SetBufferSize(int width, int height, bool view)
{
int dst_size = width * height * 3;
// Allocate a new buffer if necesary.
if (view) {
if (dst_size > view_buffer_size_) {
if (view_buffer_)
delete [] view_buffer_;
view_buffer_ = new unsigned char[dst_size];
view_buffer_size_ = dst_size;
}
} else {
if (dst_size > popup_buffer_size_) {
if (popup_buffer_)
delete [] popup_buffer_;
popup_buffer_ = new unsigned char[dst_size];
popup_buffer_size_ = dst_size;
}
}
}
// Convert from BGRA to RGB format and from upper-left to lower-left origin.
static void ConvertToRGB(const unsigned char* src, unsigned char* dst,
int width, int height)
{
int sp = 0, dp = (height-1) * width * 3;
for(int i = 0; i < height; i++) {
for(int j = 0; j < width; j++, dp += 3, sp += 4) {
dst[dp] = src[sp+2]; // R
dst[dp+1] = src[sp+1]; // G
dst[dp+2] = src[sp]; // B
}
dp -= width * 6;
}
}
private:
ClientPlugin* plugin_;
unsigned char* view_buffer_;
int view_buffer_size_;
unsigned char* popup_buffer_;
int popup_buffer_size_;
CefRect popup_rect_;
};
// Forward declarations of functions included in this code module:
LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam);
// Enable GL.
void EnableGL(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 context.
*hRC = wglCreateContext(*hDC);
wglMakeCurrent(*hDC, *hRC);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glEnable(GL_TEXTURE_2D);
// Necessary for non-power-of-2 textures to render correctly.
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
}
// Disable GL.
void DisableGL(HWND hWnd, HDC hDC, HGLRC hRC)
{
// Delete the texture.
if(g_textureID != -1)
glDeleteTextures(1, &g_textureID);
wglMakeCurrent(NULL, NULL);
wglDeleteContext(hRC);
ReleaseDC(hWnd, hDC);
}
// Size the GL view.
void SizeGL(ClientPlugin* plugin, int width, int height)
{
g_width = width;
g_height = height;
wglMakeCurrent(plugin->hDC, plugin->hRC);
// Match GL units to screen coordinates.
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, 0, width, height, 0.1, 100.0);
// Delete the existing exture.
if(g_textureID != -1)
glDeleteTextures(1, &g_textureID);
// Create a new texture.
glGenTextures(1, &g_textureID);
glBindTexture(GL_TEXTURE_2D, g_textureID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
// Start with all white contents.
int size = width * height * 3;
unsigned char* buffer = new unsigned char[size];
memset(buffer, 255, size);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
GL_RGB, GL_UNSIGNED_BYTE, buffer);
delete [] buffer;
if(g_offscreenBrowser.get())
g_offscreenBrowser->SetSize(PET_VIEW, width, height);
}
// Render the view contents.
void RenderGL(ClientPlugin* plugin)
{
wglMakeCurrent(plugin->hDC, plugin->hRC);
struct {
float tu, tv;
float x, y, z;
} static vertices[] = {
{0.0f, 0.0f, -1.0f, -1.0f, 0.0f},
{1.0f, 0.0f, 1.0f, -1.0f, 0.0f},
{1.0f, 1.0f, 1.0f, 1.0f, 0.0f},
{0.0f, 1.0f, -1.0f, 1.0f, 0.0f}
};
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//glTranslatef(0.0f, 0.0f, -3.0f);
// Rotate the view based on the mouse spin.
glRotatef(-g_spinX, 1.0f, 0.0f, 0.0f);
glRotatef(-g_spinY, 0.0f, 1.0f, 0.0f);
// Enable alpha blending.
//glEnable(GL_BLEND);
//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// Draw the facets with the texture.
glBindTexture(GL_TEXTURE_2D, g_textureID);
glInterleavedArrays(GL_T2F_V3F, 0, vertices);
glDrawArrays(GL_QUADS, 0, 4);
//glDisable(GL_BLEND);
SwapBuffers(plugin->hDC);
}
NPError NPP_NewImpl(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;
}
NPError NPP_DestroyImpl(NPP instance, NPSavedData** save) {
ClientPlugin *plugin = reinterpret_cast<ClientPlugin*>(instance->pdata);
if (plugin) {
if(plugin->hWnd) {
DestroyWindow(plugin->hWnd);
DisableGL(plugin->hWnd, plugin->hDC, plugin->hRC);
}
delete plugin;
}
return NPERR_NO_ERROR;
}
NPError NPP_SetWindowImpl(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"ClientOSRPlugin";
RegisterClass(&wc);
// Create the main window.
plugin->hWnd = CreateWindow(L"ClientOSRPlugin", L"Client OSR Plugin",
WS_CHILD|WS_CLIPCHILDREN|WS_CLIPSIBLINGS, 0, 0, 0, 0, parent_hwnd, NULL,
hInstance, NULL);
SetWindowLongPtr(plugin->hWnd, GWLP_USERDATA,
reinterpret_cast<LONG_PTR>(plugin));
// Enable GL drawing for the window.
EnableGL(plugin->hWnd, &(plugin->hDC), &(plugin->hRC));
// Create the off-screen rendering window.
CefWindowInfo windowInfo;
windowInfo.SetAsOffScreen(plugin->hWnd);
CefBrowser::CreateBrowser(windowInfo, false,
new ClientOSRHandler(plugin), "http://www.google.com");
}
// Position the plugin 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;
}
// Plugin window procedure.
LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam)
{
static POINT lastMousePos, curMousePos;
static bool mouseRotation = false;
static bool mouseTracking = false;
ClientPlugin* plugin =
reinterpret_cast<ClientPlugin*>(GetWindowLongPtr(hWnd, GWLP_USERDATA));
switch(message)
{
case WM_CREATE:
// Start the timer that's used for redrawing.
SetTimer(hWnd, 1, 20, NULL);
return 0;
case WM_DESTROY:
// Stop the timer that's used for redrawing.
KillTimer(hWnd, 1);
g_offscreenBrowser = NULL;
return 0;
case WM_TIMER:
RenderGL(plugin);
break;
case WM_LBUTTONDOWN:
case WM_RBUTTONDOWN:
SetCapture(hWnd);
SetFocus(hWnd);
if (wParam & MK_SHIFT) {
// Start rotation effect.
lastMousePos.x = curMousePos.x = LOWORD(lParam);
lastMousePos.y = curMousePos.y = HIWORD(lParam);
mouseRotation = true;
} else {
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseClickEvent(LOWORD(lParam), HIWORD(lParam),
(message==WM_LBUTTONDOWN?MBT_LEFT:MBT_RIGHT), false, 1);
}
}
break;
case WM_LBUTTONUP:
case WM_RBUTTONUP:
if (GetCapture() == hWnd)
ReleaseCapture();
if (mouseRotation) {
// End rotation effect.
mouseRotation = false;
g_spinX = 0;
g_spinY = 0;
} else {
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseClickEvent(LOWORD(lParam), HIWORD(lParam),
(message==WM_LBUTTONUP?MBT_LEFT:MBT_RIGHT), true, 1);
}
}
break;
case WM_MOUSEMOVE:
if(mouseRotation) {
// Apply rotation effect.
curMousePos.x = LOWORD(lParam);
curMousePos.y = HIWORD(lParam);
g_spinX -= (curMousePos.x - lastMousePos.x);
g_spinY -= (curMousePos.y - lastMousePos.y);
lastMousePos.x = curMousePos.x;
lastMousePos.y = curMousePos.y;
} else {
if (!mouseTracking) {
// Start tracking mouse leave. Required for the WM_MOUSELEAVE event to
// be generated.
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(TRACKMOUSEEVENT);
tme.dwFlags = TME_LEAVE;
tme.hwndTrack = hWnd;
TrackMouseEvent(&tme);
mouseTracking = true;
}
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseMoveEvent(LOWORD(lParam), HIWORD(lParam),
false);
}
}
break;
case WM_MOUSELEAVE:
if (mouseTracking) {
// Stop tracking mouse leave.
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(TRACKMOUSEEVENT);
tme.dwFlags = TME_LEAVE & TME_CANCEL;
tme.hwndTrack = hWnd;
TrackMouseEvent(&tme);
mouseTracking = false;
}
if (g_offscreenBrowser.get())
g_offscreenBrowser->SendMouseMoveEvent(0, 0, true);
break;
case WM_MOUSEWHEEL:
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseWheelEvent(LOWORD(lParam), HIWORD(lParam),
GET_WHEEL_DELTA_WPARAM(wParam));
}
break;
case WM_SIZE: {
int width = LOWORD(lParam);
int height = HIWORD(lParam);
if(width > 0 && height > 0)
SizeGL(plugin, width, height);
} break;
case WM_SETFOCUS:
case WM_KILLFOCUS:
if (g_offscreenBrowser.get())
g_offscreenBrowser->SendFocusEvent(message==WM_SETFOCUS);
break;
case WM_CAPTURECHANGED:
case WM_CANCELMODE:
if(!mouseRotation) {
if (g_offscreenBrowser.get())
g_offscreenBrowser->SendCaptureLostEvent();
}
break;
case WM_KEYDOWN:
case WM_KEYUP:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
case WM_CHAR:
case WM_SYSCHAR:
case WM_IME_CHAR:
if (g_offscreenBrowser.get()) {
CefBrowser::KeyType type = KT_CHAR;
bool sysChar = false, imeChar = false;
if (message == WM_KEYDOWN || message == WM_SYSKEYDOWN)
type = KT_KEYDOWN;
else if (message == WM_KEYUP || message == WM_SYSKEYUP)
type = KT_KEYUP;
if (message == WM_SYSKEYDOWN || message == WM_SYSKEYUP ||
message == WM_SYSCHAR)
sysChar = true;
if (message == WM_IME_CHAR)
imeChar = true;
g_offscreenBrowser->SendKeyEvent(type, wParam, lParam, sysChar, imeChar);
}
break;
case WM_PAINT: {
PAINTSTRUCT ps;
BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
} return 0;
case WM_ERASEBKGND:
return 0;
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
} // namespace
NPError API_CALL NP_OSRGetEntryPoints(NPPluginFuncs* pFuncs)
{
pFuncs->newp = NPP_NewImpl;
pFuncs->destroy = NPP_DestroyImpl;
pFuncs->setwindow = NPP_SetWindowImpl;
return NPERR_NO_ERROR;
}
NPError API_CALL NP_OSRInitialize(NPNetscapeFuncs* pFuncs)
{
g_osrbrowser = pFuncs;
return NPERR_NO_ERROR;
}
NPError API_CALL NP_OSRShutdown(void)
{
g_osrbrowser = NULL;
return NPERR_NO_ERROR;
}
CefRefPtr<CefBrowser> GetOffScreenBrowser()
{
return g_offscreenBrowser;
}
#endif // _WIN32
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