src/Main/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 #include <boost/foreach.hpp>
  33
  34 #include <simgear/compiler.h>
  35 #include <simgear/structure/exception.hxx>
  36 #include <simgear/debug/logstream.hxx>
  37 #include <simgear/props/props_io.hxx>
  38
  39 #include <osg/Camera>
  40 #include <osg/GraphicsContext>
  41 #include <osg/Group>
  42 #include <osg/Matrixd>
  43 #include <osg/Viewport>
  44 #include <osg/Version>
  45 #include <osg/View>
  46 #include <osgViewer/ViewerEventHandlers>
  47 #include <osgViewer/Viewer>
  48 #include <osgGA/MatrixManipulator>
  49
  50 #include <Include/general.hxx>
  51 #include <Scenery/scenery.hxx>
  52 #include "fg_os.hxx"
  53 #include "fg_props.hxx"
  54 #include "util.hxx"
  55 #include "globals.hxx"
  56 #include "renderer.hxx"
  57 #include "CameraGroup.hxx"
  58 #include "FGEventHandler.hxx"
  59 #include "WindowBuilder.hxx"
  60 #include "WindowSystemAdapter.hxx"
  61
  62 // fg_os implementation using OpenSceneGraph's osgViewer::Viewer class
  63 // to create the graphics window and run the event/update/render loop.
  64
  65 //
  66 // fg_os implementation
  67 //
  68
  69 using namespace std;
  70 using namespace flightgear;
  71 using namespace osg;
  72
  73 static osg::ref_ptr<osgViewer::Viewer> viewer;
  74 static osg::ref_ptr<osg::Camera> mainCamera;
  75
  76 void fgOSOpenWindow(bool stencil)
  77 {
  78     viewer = new osgViewer::Viewer;
  79     viewer->setDatabasePager(FGScenery::getPagerSingleton());
  80     CameraGroup* cameraGroup = 0;
  81     std::string mode;
  82     mode = fgGetString("/sim/rendering/multithreading-mode", "SingleThreaded");
  83     if (mode == "AutomaticSelection")
  84       viewer->setThreadingModel(osgViewer::Viewer::AutomaticSelection);
  85     else if (mode == "CullDrawThreadPerContext")
  86       viewer->setThreadingModel(osgViewer::Viewer::CullDrawThreadPerContext);
  87     else if (mode == "DrawThreadPerContext")
  88       viewer->setThreadingModel(osgViewer::Viewer::DrawThreadPerContext);
  89     else if (mode == "CullThreadPerCameraDrawThreadPerContext")
  90       viewer->setThreadingModel(osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext);
  91     else
  92       viewer->setThreadingModel(osgViewer::Viewer::SingleThreaded);
  93     WindowBuilder::initWindowBuilder(stencil);
  94     WindowBuilder *windowBuilder = WindowBuilder::getWindowBuilder();
  95
  96     // Look for windows, camera groups, and the old syntax of
  97     // top-level cameras
  98     SGPropertyNode* renderingNode = fgGetNode("/sim/rendering");
  99     SGPropertyNode* cgroupNode = renderingNode->getNode("camera-group", true);
 100     bool oldSyntax = !cgroupNode->hasChild("camera");
 101     if (oldSyntax) {
 102         for (int i = 0; i < renderingNode->nChildren(); ++i) {
 103             SGPropertyNode* propNode = renderingNode->getChild(i);
 104             const char* propName = propNode->getName();
 105             if (!strcmp(propName, "window") || !strcmp(propName, "camera")) {
 106                 SGPropertyNode* copiedNode
 107                     = cgroupNode->getNode(propName, propNode->getIndex(), true);
 108                 copyProperties(propNode, copiedNode);
 109             }
 110         }
 111         vector<SGPropertyNode_ptr> cameras = cgroupNode->getChildren("camera");
 112         SGPropertyNode* masterCamera = 0;
 113         BOOST_FOREACH(SGPropertyNode_ptr& camera, cameras) {
 114             if (camera->getDoubleValue("shear-x", 0.0) == 0.0
 115                 && camera->getDoubleValue("shear-y", 0.0) == 0.0) {
 116                 masterCamera = camera.ptr();
 117                 break;
 118             }
 119         }
 120         if (!masterCamera) {
 121             masterCamera = cgroupNode->getChild("camera", cameras.size(), true);
 122             setValue(masterCamera->getNode("window/name", true),
 123                      windowBuilder->getDefaultWindowName());
 124         }
 125         SGPropertyNode* nameNode = masterCamera->getNode("window/name");
 126         if (nameNode)
 127             setValue(cgroupNode->getNode("gui/window/name", true),
 128                      nameNode->getStringValue());
 129     }
 130     cameraGroup = CameraGroup::buildCameraGroup(viewer.get(), cgroupNode);
 131     Camera* guiCamera = getGUICamera(cameraGroup);
 132     if (guiCamera) {
 133         Viewport* guiViewport = guiCamera->getViewport();
 134         fgSetInt("/sim/startup/xsize", guiViewport->width());
 135         fgSetInt("/sim/startup/ysize", guiViewport->height());
 136     }
 137     FGEventHandler* manipulator = globals->get_renderer()->getEventHandler();
 138     WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
 139     if (wsa->windows.size() != 1) {
 140         manipulator->setResizable(false);
 141     }
 142     viewer->getCamera()->setProjectionResizePolicy(osg::Camera::FIXED);
 143     viewer->addEventHandler(manipulator);
 144     // Let FG handle the escape key with a confirmation
 145     viewer->setKeyEventSetsDone(0);
 146     // The viewer won't start without some root.
 147     viewer->setSceneData(new osg::Group);
 148     globals->get_renderer()->setViewer(viewer.get());
 149     CameraGroup::setDefault(cameraGroup);
 150 }
 151
 152 static int status = 0;
 153
 154 void fgOSExit(int code)
 155 {
 156     viewer->setDone(true);
 157     viewer->getDatabasePager()->cancel();
 158     status = code;
 159 }
 160
 161 void fgOSMainLoop()
 162 {
 163     ref_ptr<FGEventHandler> manipulator
 164         = globals->get_renderer()->getEventHandler();
 165     viewer->setReleaseContextAtEndOfFrameHint(false);
 166     if (!viewer->isRealized())
 167         viewer->realize();
 168     while (!viewer->done()) {
 169         fgIdleHandler idleFunc = manipulator->getIdleHandler();
 170         fgDrawHandler drawFunc = manipulator->getDrawHandler();
 171         if (idleFunc)
 172             (*idleFunc)();
 173         if (drawFunc)
 174             (*drawFunc)();
 175         viewer->frame();
 176     }
 177     fgExit(status);
 178 }
 179
 180 int fgGetKeyModifiers()
 181 {
 182     return globals->get_renderer()->getEventHandler()->getCurrentModifiers();
 183 }
 184
 185 void fgWarpMouse(int x, int y)
 186 {
 187     warpGUIPointer(CameraGroup::getDefault(), x, y);
 188 }
 189
 190 void fgOSInit(int* argc, char** argv)
 191 {
 192     WindowSystemAdapter::setWSA(new WindowSystemAdapter);
 193 }
 194
 195 // Noop
 196 void fgOSFullScreen()
 197 {
 198 }
 199
 200 static void setMouseCursor(osg::Camera* camera, int cursor)
 201 {
 202     if (!camera)
 203         return;
 204     osg::GraphicsContext* gc = camera->getGraphicsContext();
 205     if (!gc)
 206         return;
 207     osgViewer::GraphicsWindow* gw;
 208     gw = dynamic_cast<osgViewer::GraphicsWindow*>(gc);
 209     if (!gw)
 210         return;
 211
 212     osgViewer::GraphicsWindow::MouseCursor mouseCursor;
 213     mouseCursor = osgViewer::GraphicsWindow::InheritCursor;
 214     if     (cursor == MOUSE_CURSOR_NONE)
 215         mouseCursor = osgViewer::GraphicsWindow::NoCursor;
 216     else if(cursor == MOUSE_CURSOR_POINTER)
 217         mouseCursor = osgViewer::GraphicsWindow::RightArrowCursor;
 218     else if(cursor == MOUSE_CURSOR_WAIT)
 219         mouseCursor = osgViewer::GraphicsWindow::WaitCursor;
 220     else if(cursor == MOUSE_CURSOR_CROSSHAIR)
 221         mouseCursor = osgViewer::GraphicsWindow::CrosshairCursor;
 222     else if(cursor == MOUSE_CURSOR_LEFTRIGHT)
 223         mouseCursor = osgViewer::GraphicsWindow::LeftRightCursor;
 224     else if(cursor == MOUSE_CURSOR_TOPSIDE)
 225         mouseCursor = osgViewer::GraphicsWindow::TopSideCursor;
 226     else if(cursor == MOUSE_CURSOR_BOTTOMSIDE)
 227         mouseCursor = osgViewer::GraphicsWindow::BottomSideCursor;
 228     else if(cursor == MOUSE_CURSOR_LEFTSIDE)
 229         mouseCursor = osgViewer::GraphicsWindow::LeftSideCursor;
 230     else if(cursor == MOUSE_CURSOR_RIGHTSIDE)
 231         mouseCursor = osgViewer::GraphicsWindow::RightSideCursor;
 232     else if(cursor == MOUSE_CURSOR_TOPLEFT)
 233         mouseCursor = osgViewer::GraphicsWindow::TopLeftCorner;
 234     else if(cursor == MOUSE_CURSOR_TOPRIGHT)
 235         mouseCursor = osgViewer::GraphicsWindow::TopRightCorner;
 236     else if(cursor == MOUSE_CURSOR_BOTTOMLEFT)
 237         mouseCursor = osgViewer::GraphicsWindow::BottomLeftCorner;
 238     else if(cursor == MOUSE_CURSOR_BOTTOMRIGHT)
 239         mouseCursor = osgViewer::GraphicsWindow::BottomRightCorner;
 240
 241     gw->setCursor(mouseCursor);
 242 }
 243
 244 static int _cursor = -1;
 245
 246 void fgSetMouseCursor(int cursor)
 247 {
 248     _cursor = cursor;
 249     setMouseCursor(viewer->getCamera(), cursor);
 250     for (unsigned i = 0; i < viewer->getNumSlaves(); ++i)
 251         setMouseCursor(viewer->getSlave(i)._camera.get(), cursor);
 252 }
 253
 254 int fgGetMouseCursor()
 255 {
 256     return _cursor;
 257 }