src/Viewer/fg_os_osgviewer.cxx

   1 // fg_os_osgviewer.cxx -- common functions for fg_os interface
   2 // implemented as an osgViewer
   3 //
   4 // Copyright (C) 2007  Tim Moore timoore@redhat.com
   5 // Copyright (C) 2007 Mathias Froehlich
   6 //
   7 // This program is free software; you can redistribute it and/or
   8 // modify it under the terms of the GNU General Public License as
   9 // published by the Free Software Foundation; either version 2 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 // General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License
  18 // along with this program; if not, write to the Free Software
  19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24
  25 #include <algorithm>
  26 #include <iostream>
  27 #include <sstream>
  28 #include <string>
  29
  30 #include <stdlib.h>
  31
  32 // Boost
  33 #include <boost/algorithm/string/case_conv.hpp>
  34 #include <boost/foreach.hpp>
  35
  36 #include <simgear/compiler.h>
  37 #include <simgear/structure/exception.hxx>
  38 #include <simgear/debug/logstream.hxx>
  39 #include <simgear/props/props_io.hxx>
  40
  41 #include <osg/Camera>
  42 #include <osg/GraphicsContext>
  43 #include <osg/Group>
  44 #include <osg/Matrixd>
  45 #include <osg/Viewport>
  46 #include <osg/Version>
  47 #include <osg/Notify>
  48 #include <osg/View>
  49 #include <osgViewer/ViewerEventHandlers>
  50 #include <osgViewer/Viewer>
  51 #include <osgViewer/GraphicsWindow>
  52
  53 #include <Scenery/scenery.hxx>
  54 #include <Main/fg_os.hxx>
  55 #include <Main/fg_props.hxx>
  56 #include <Main/util.hxx>
  57 #include <Main/globals.hxx>
  58 #include "renderer.hxx"
  59 #include "CameraGroup.hxx"
  60 #include "FGEventHandler.hxx"
  61 #include "WindowBuilder.hxx"
  62 #include "WindowSystemAdapter.hxx"
  63
  64 // Static linking of OSG needs special macros
  65 #ifdef OSG_LIBRARY_STATIC
  66 #include <osgDB/Registry>
  67 USE_GRAPHICSWINDOW();
  68 // Image formats
  69 USE_OSGPLUGIN(bmp);
  70 USE_OSGPLUGIN(dds);
  71 USE_OSGPLUGIN(hdr);
  72 USE_OSGPLUGIN(pic);
  73 USE_OSGPLUGIN(pnm);
  74 USE_OSGPLUGIN(rgb);
  75 USE_OSGPLUGIN(tga);
  76 #ifdef OSG_JPEG_ENABLED
  77   USE_OSGPLUGIN(jpeg);
  78 #endif
  79 #ifdef OSG_PNG_ENABLED
  80   USE_OSGPLUGIN(png);
  81 #endif
  82 #ifdef OSG_TIFF_ENABLED
  83   USE_OSGPLUGIN(tiff);
  84 #endif
  85 // Model formats
  86 USE_OSGPLUGIN(3ds);
  87 USE_OSGPLUGIN(ac);
  88 USE_OSGPLUGIN(ive);
  89 USE_OSGPLUGIN(osg);
  90 USE_OSGPLUGIN(txf);
  91 #endif
  92
  93 // fg_os implementation using OpenSceneGraph's osgViewer::Viewer class
  94 // to create the graphics window and run the event/update/render loop.
  95
  96 //
  97 // fg_os implementation
  98 //
  99
 100 using namespace std;
 101 using namespace flightgear;
 102 using namespace osg;
 103
 104 osg::ref_ptr<osgViewer::Viewer> viewer;
 105
 106 static void setStereoMode( const char * mode )
 107 {
 108     DisplaySettings::StereoMode stereoMode = DisplaySettings::QUAD_BUFFER;
 109     bool stereoOn = true;
 110
 111     if (strcmp(mode,"QUAD_BUFFER")==0)
 112     {
 113         stereoMode = DisplaySettings::QUAD_BUFFER;
 114     }
 115     else if (strcmp(mode,"ANAGLYPHIC")==0)
 116     {
 117         stereoMode = DisplaySettings::ANAGLYPHIC;
 118     }
 119     else if (strcmp(mode,"HORIZONTAL_SPLIT")==0)
 120     {
 121         stereoMode = DisplaySettings::HORIZONTAL_SPLIT;
 122     }
 123     else if (strcmp(mode,"VERTICAL_SPLIT")==0)
 124     {
 125         stereoMode = DisplaySettings::VERTICAL_SPLIT;
 126     }
 127     else if (strcmp(mode,"LEFT_EYE")==0)
 128     {
 129         stereoMode = DisplaySettings::LEFT_EYE;
 130     }
 131     else if (strcmp(mode,"RIGHT_EYE")==0)
 132     {
 133         stereoMode = DisplaySettings::RIGHT_EYE;
 134     }
 135     else if (strcmp(mode,"HORIZONTAL_INTERLACE")==0)
 136     {
 137         stereoMode = DisplaySettings::HORIZONTAL_INTERLACE;
 138     }
 139     else if (strcmp(mode,"VERTICAL_INTERLACE")==0)
 140     {
 141         stereoMode = DisplaySettings::VERTICAL_INTERLACE;
 142     }
 143     else if (strcmp(mode,"CHECKERBOARD")==0)
 144     {
 145         stereoMode = DisplaySettings::CHECKERBOARD;
 146     } else {
 147         stereoOn = false;
 148     }
 149     DisplaySettings::instance()->setStereo( stereoOn );
 150     DisplaySettings::instance()->setStereoMode( stereoMode );
 151 }
 152
 153 static const char * getStereoMode()
 154 {
 155     DisplaySettings::StereoMode stereoMode = DisplaySettings::instance()->getStereoMode();
 156     bool stereoOn = DisplaySettings::instance()->getStereo();
 157     if( !stereoOn ) return "OFF";
 158     if( stereoMode == DisplaySettings::QUAD_BUFFER ) {
 159         return "QUAD_BUFFER";
 160     } else if( stereoMode == DisplaySettings::ANAGLYPHIC ) {
 161         return "ANAGLYPHIC";
 162     } else if( stereoMode == DisplaySettings::HORIZONTAL_SPLIT ) {
 163         return "HORIZONTAL_SPLIT";
 164     } else if( stereoMode == DisplaySettings::VERTICAL_SPLIT ) {
 165         return "VERTICAL_SPLIT";
 166     } else if( stereoMode == DisplaySettings::LEFT_EYE ) {
 167         return "LEFT_EYE";
 168     } else if( stereoMode == DisplaySettings::RIGHT_EYE ) {
 169         return "RIGHT_EYE";
 170     } else if( stereoMode == DisplaySettings::HORIZONTAL_INTERLACE ) {
 171         return "HORIZONTAL_INTERLACE";
 172     } else if( stereoMode == DisplaySettings::VERTICAL_INTERLACE ) {
 173         return "VERTICAL_INTERLACE";
 174     } else if( stereoMode == DisplaySettings::CHECKERBOARD ) {
 175         return "CHECKERBOARD";
 176     }
 177     return "OFF";
 178 }
 179
 180 /**
 181  * merge OSG output into our logging system, so it gets recorded to file,
 182  * and so we can display a GUI console with renderer issues, especially
 183  * shader compilation warnings and errors.
 184  */
 185 class NotifyLogger : public osg::NotifyHandler
 186 {
 187 public:
 188   // note this callback will be invoked by OSG from multiple threads.
 189   // fortunately our Simgear logging implementation already handles
 190   // that internally, so we simply pass the message on.
 191   virtual void notify(osg::NotifySeverity severity, const char *message)
 192   {
 193     SG_LOG(SG_GL, translateSeverity(severity), message);
 194
 195     // Detect whether a osg::Reference derived object is deleted with a non-zero
 196     // reference count. In this case trigger a segfault to get a stack trace.
 197     if( strstr(message, "the final reference count was") )
 198     {
 199
 200       int* trigger_segfault = 0;
 201       *trigger_segfault = 0;
 202     }
 203   }
 204
 205 private:
 206   sgDebugPriority translateSeverity(osg::NotifySeverity severity)
 207   {
 208     switch (severity) {
 209       case osg::ALWAYS:
 210       case osg::FATAL:  return SG_ALERT;
 211       case osg::WARN:   return SG_WARN;
 212       case osg::NOTICE:
 213       case osg::INFO:   return SG_INFO;
 214       case osg::DEBUG_FP:
 215       case osg::DEBUG_INFO: return SG_DEBUG;
 216       default: return SG_ALERT;
 217     }
 218   }
 219 };
 220
 221 class NotifyLevelListener : public SGPropertyChangeListener
 222 {
 223 public:
 224     void valueChanged(SGPropertyNode* node)
 225     {
 226         osg::NotifySeverity severity = osg::WARN;
 227         string val = boost::to_lower_copy(string(node->getStringValue()));
 228
 229         if (val == "fatal") {
 230             severity = osg::FATAL;
 231         } else if (val == "warn") {
 232             severity = osg::WARN;
 233         } else if (val == "notice") {
 234             severity = osg::NOTICE;
 235         } else if (val == "info") {
 236             severity = osg::INFO;
 237         } else if ((val == "debug") || (val == "debug-info")) {
 238             severity = osg::DEBUG_INFO;
 239         }
 240
 241         osg::setNotifyLevel(severity);
 242     }
 243 };
 244
 245 void updateOSGNotifyLevel()
 246 {
 247    }
 248
 249 void fgOSOpenWindow(bool stencil)
 250 {
 251     osg::setNotifyHandler(new NotifyLogger);
 252
 253     viewer = new osgViewer::Viewer;
 254     viewer->setDatabasePager(FGScenery::getPagerSingleton());
 255
 256     std::string mode;
 257     mode = fgGetString("/sim/rendering/multithreading-mode", "SingleThreaded");
 258     if (mode == "AutomaticSelection")
 259       viewer->setThreadingModel(osgViewer::Viewer::AutomaticSelection);
 260     else if (mode == "CullDrawThreadPerContext")
 261       viewer->setThreadingModel(osgViewer::Viewer::CullDrawThreadPerContext);
 262     else if (mode == "DrawThreadPerContext")
 263       viewer->setThreadingModel(osgViewer::Viewer::DrawThreadPerContext);
 264     else if (mode == "CullThreadPerCameraDrawThreadPerContext")
 265       viewer->setThreadingModel(osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext);
 266     else
 267       viewer->setThreadingModel(osgViewer::Viewer::SingleThreaded);
 268     WindowBuilder::initWindowBuilder(stencil);
 269     CameraGroup::buildDefaultGroup(viewer.get());
 270
 271     FGEventHandler* manipulator = globals->get_renderer()->getEventHandler();
 272     WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
 273     if (wsa->windows.size() != 1) {
 274         manipulator->setResizable(false);
 275     }
 276     viewer->getCamera()->setProjectionResizePolicy(osg::Camera::FIXED);
 277     viewer->addEventHandler(manipulator);
 278     // Let FG handle the escape key with a confirmation
 279     viewer->setKeyEventSetsDone(0);
 280     // The viewer won't start without some root.
 281     viewer->setSceneData(new osg::Group);
 282     globals->get_renderer()->setViewer(viewer.get());
 283 }
 284
 285 void fgOSResetProperties()
 286 {
 287     SGPropertyNode* osgLevel = fgGetNode("/sim/rendering/osg-notify-level", true);
 288     NotifyLevelListener* l = new NotifyLevelListener;
 289     globals->addListenerToCleanup(l);
 290     osgLevel->addChangeListener(l, true);
 291
 292     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 293     if (guiCamera) {
 294         Viewport* guiViewport = guiCamera->getViewport();
 295         fgSetInt("/sim/startup/xsize", guiViewport->width());
 296         fgSetInt("/sim/startup/ysize", guiViewport->height());
 297     }
 298
 299     DisplaySettings * displaySettings = DisplaySettings::instance();
 300     fgTie("/sim/rendering/osg-displaysettings/eye-separation", displaySettings, &DisplaySettings::getEyeSeparation, &DisplaySettings::setEyeSeparation );
 301     fgTie("/sim/rendering/osg-displaysettings/screen-distance", displaySettings, &DisplaySettings::getScreenDistance, &DisplaySettings::setScreenDistance );
 302     fgTie("/sim/rendering/osg-displaysettings/screen-width", displaySettings, &DisplaySettings::getScreenWidth, &DisplaySettings::setScreenWidth );
 303     fgTie("/sim/rendering/osg-displaysettings/screen-height", displaySettings, &DisplaySettings::getScreenHeight, &DisplaySettings::setScreenHeight );
 304     fgTie("/sim/rendering/osg-displaysettings/stereo-mode", getStereoMode, setStereoMode );
 305     fgTie("/sim/rendering/osg-displaysettings/double-buffer", displaySettings, &DisplaySettings::getDoubleBuffer, &DisplaySettings::setDoubleBuffer );
 306     fgTie("/sim/rendering/osg-displaysettings/depth-buffer", displaySettings, &DisplaySettings::getDepthBuffer, &DisplaySettings::setDepthBuffer );
 307     fgTie("/sim/rendering/osg-displaysettings/rgb", displaySettings, &DisplaySettings::getRGB, &DisplaySettings::setRGB );
 308 }
 309
 310
 311 static int status = 0;
 312
 313 void fgOSExit(int code)
 314 {
 315     viewer->setDone(true);
 316     viewer->getDatabasePager()->cancel();
 317     status = code;
 318
 319     // otherwise we crash if OSG does logging during static destruction, eg
 320     // GraphicsWindowX11, since OSG statics may have been created before the
 321     // sglog static, despite our best efforts in boostrap.cxx
 322     osg::setNotifyHandler(new osg::StandardNotifyHandler);
 323 }
 324
 325 int fgOSMainLoop()
 326 {
 327     viewer->setReleaseContextAtEndOfFrameHint(false);
 328     if (!viewer->isRealized())
 329         viewer->realize();
 330     while (!viewer->done()) {
 331         fgIdleHandler idleFunc = globals->get_renderer()->getEventHandler()->getIdleHandler();
 332         if (idleFunc)
 333             (*idleFunc)();
 334         globals->get_renderer()->update();
 335         viewer->frame( globals->get_sim_time_sec() );
 336     }
 337
 338     return status;
 339 }
 340
 341 int fgGetKeyModifiers()
 342 {
 343     if (!globals->get_renderer()) { // happens during shutdown
 344       return 0;
 345     }
 346
 347     return globals->get_renderer()->getEventHandler()->getCurrentModifiers();
 348 }
 349
 350 void fgWarpMouse(int x, int y)
 351 {
 352     warpGUIPointer(CameraGroup::getDefault(), x, y);
 353 }
 354
 355 void fgOSInit(int* argc, char** argv)
 356 {
 357     globals->get_renderer()->init();
 358     WindowSystemAdapter::setWSA(new WindowSystemAdapter);
 359 }
 360
 361 void fgOSCloseWindow()
 362 {
 363     FGScenery::resetPagerSingleton();
 364     flightgear::CameraGroup::setDefault(NULL);
 365     WindowSystemAdapter::setWSA(NULL);
 366     viewer = NULL;
 367 }
 368
 369 void fgOSFullScreen()
 370 {
 371     std::vector<osgViewer::GraphicsWindow*> windows;
 372     viewer->getWindows(windows);
 373
 374     if (windows.empty())
 375         return; // Huh?!?
 376
 377     /* Toggling window fullscreen is only supported for the main GUI window.
 378      * The other windows should use fixed setup from the camera.xml file anyway. */
 379     osgViewer::GraphicsWindow* window = windows[0];
 380
 381     {
 382         osg::GraphicsContext::WindowingSystemInterface    *wsi = osg::GraphicsContext::getWindowingSystemInterface();
 383
 384         if (wsi == NULL)
 385         {
 386             SG_LOG(SG_VIEW, SG_ALERT, "ERROR: No WindowSystemInterface available. Cannot toggle window fullscreen.");
 387             return;
 388         }
 389
 390         static int previous_x = 0;
 391         static int previous_y = 0;
 392         static int previous_width = 800;
 393         static int previous_height = 600;
 394
 395         unsigned int screenWidth;
 396         unsigned int screenHeight;
 397         wsi->getScreenResolution(*(window->getTraits()), screenWidth, screenHeight);
 398
 399         int x;
 400         int y;
 401         int width;
 402         int height;
 403         window->getWindowRectangle(x, y, width, height);
 404
 405         /* Note: the simple "is window size == screen size" check to detect full screen state doesn't work with
 406          * X screen servers in Xinerama mode, since the reported screen width (or height) exceeds the maximum width
 407          * (or height) usable by a single window (Xserver automatically shrinks/moves the full screen window to fit a
 408          * single display) - so we detect full screen mode using "WindowDecoration" state instead.
 409          * "false" - even when a single window is display in fullscreen */
 410         //bool isFullScreen = x == 0 && y == 0 && width == (int)screenWidth && height == (int)screenHeight;
 411         bool isFullScreen = !window->getWindowDecoration();
 412
 413         SG_LOG(SG_VIEW, SG_DEBUG, "Toggling fullscreen. Previous window rectangle ("
 414                << x << ", " << y << ") x (" << width << ", " << height << "), fullscreen: " << isFullScreen
 415                << ", number of screens: " << wsi->getNumScreens());
 416         if (isFullScreen)
 417         {
 418             // limit x,y coordinates and window size to screen area
 419             if (previous_x + previous_width > (int)screenWidth)
 420                 previous_x = 0;
 421             if (previous_y + previous_height > (int)screenHeight)
 422                 previous_y = 0;
 423
 424             // disable fullscreen mode, restore previous window size/coordinates
 425             x = previous_x;
 426             y = previous_y;
 427             width = previous_width;
 428             height = previous_height;
 429         }
 430         else
 431         {
 432             // remember previous setting
 433             previous_x = x;
 434             previous_y = y;
 435             previous_width = width;
 436             previous_height = height;
 437
 438             // enable fullscreen mode, set new width/height
 439             x = 0;
 440             y = 0;
 441             width = screenWidth;
 442             height = screenHeight;
 443         }
 444
 445         // set xsize/ysize properties to adapt GUI planes
 446         fgSetInt("/sim/startup/xsize", width);
 447         fgSetInt("/sim/startup/ysize", height);
 448
 449         // reconfigure window
 450         window->setWindowDecoration(isFullScreen);
 451         window->setWindowRectangle(x, y, width, height);
 452         window->grabFocusIfPointerInWindow();
 453     }
 454 }
 455
 456 static void setMouseCursor(osgViewer::GraphicsWindow* gw, int cursor)
 457 {
 458     if (!gw) {
 459         return;
 460     }
 461
 462     osgViewer::GraphicsWindow::MouseCursor mouseCursor;
 463     mouseCursor = osgViewer::GraphicsWindow::InheritCursor;
 464     if (cursor == MOUSE_CURSOR_NONE)
 465         mouseCursor = osgViewer::GraphicsWindow::NoCursor;
 466     else if(cursor == MOUSE_CURSOR_POINTER)
 467 #ifdef SG_MAC
 468         // osgViewer-Cocoa lacks RightArrowCursor, use Left
 469         mouseCursor = osgViewer::GraphicsWindow::LeftArrowCursor;
 470 #else
 471         mouseCursor = osgViewer::GraphicsWindow::RightArrowCursor;
 472 #endif
 473     else if(cursor == MOUSE_CURSOR_WAIT)
 474         mouseCursor = osgViewer::GraphicsWindow::WaitCursor;
 475     else if(cursor == MOUSE_CURSOR_CROSSHAIR)
 476         mouseCursor = osgViewer::GraphicsWindow::CrosshairCursor;
 477     else if(cursor == MOUSE_CURSOR_LEFTRIGHT)
 478         mouseCursor = osgViewer::GraphicsWindow::LeftRightCursor;
 479     else if(cursor == MOUSE_CURSOR_TOPSIDE)
 480         mouseCursor = osgViewer::GraphicsWindow::TopSideCursor;
 481     else if(cursor == MOUSE_CURSOR_BOTTOMSIDE)
 482         mouseCursor = osgViewer::GraphicsWindow::BottomSideCursor;
 483     else if(cursor == MOUSE_CURSOR_LEFTSIDE)
 484         mouseCursor = osgViewer::GraphicsWindow::LeftSideCursor;
 485     else if(cursor == MOUSE_CURSOR_RIGHTSIDE)
 486         mouseCursor = osgViewer::GraphicsWindow::RightSideCursor;
 487     else if(cursor == MOUSE_CURSOR_TOPLEFT)
 488         mouseCursor = osgViewer::GraphicsWindow::TopLeftCorner;
 489     else if(cursor == MOUSE_CURSOR_TOPRIGHT)
 490         mouseCursor = osgViewer::GraphicsWindow::TopRightCorner;
 491     else if(cursor == MOUSE_CURSOR_BOTTOMLEFT)
 492         mouseCursor = osgViewer::GraphicsWindow::BottomLeftCorner;
 493     else if(cursor == MOUSE_CURSOR_BOTTOMRIGHT)
 494         mouseCursor = osgViewer::GraphicsWindow::BottomRightCorner;
 495
 496     gw->setCursor(mouseCursor);
 497 }
 498
 499 static int _cursor = -1;
 500
 501 void fgSetMouseCursor(int cursor)
 502 {
 503     _cursor = cursor;
 504     if (!viewer)
 505         return;
 506
 507     std::vector<osgViewer::GraphicsWindow*> windows;
 508     viewer->getWindows(windows);
 509     BOOST_FOREACH(osgViewer::GraphicsWindow* gw, windows) {
 510         setMouseCursor(gw, cursor);
 511     }
 512 }
 513
 514 int fgGetMouseCursor()
 515 {
 516     return _cursor;
 517 }