src/Main/WindowBuilder.cxx

   1 // Copyright (C) 2008  Tim Moore
   2 //
   3 // This program is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU General Public License as
   5 // published by the Free Software Foundation; either version 2 of the
   6 // License, or (at your option) any later version.
   7 //
   8 // This program is distributed in the hope that it will be useful, but
   9 // WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16
  17 #include "WindowBuilder.hxx"
  18
  19 #include "WindowSystemAdapter.hxx"
  20 #include "fg_props.hxx"
  21
  22 #include <sstream>
  23
  24 using namespace std;
  25 using namespace osg;
  26
  27 namespace flightgear
  28 {
  29 string makeName(const string& prefix, int num)
  30 {
  31     stringstream stream;
  32     stream << prefix << num;
  33     return stream.str();
  34 }
  35
  36 ref_ptr<WindowBuilder> WindowBuilder::windowBuilder;
  37
  38 const string WindowBuilder::defaultWindowName("FlightGear");
  39
  40 void WindowBuilder::initWindowBuilder(bool stencil)
  41 {
  42     windowBuilder = new WindowBuilder(stencil);
  43 }
  44
  45 WindowBuilder::WindowBuilder(bool stencil) : defaultCounter(0)
  46 {
  47     defaultTraits = makeDefaultTraits(stencil);
  48 }
  49
  50 GraphicsContext::Traits*
  51 WindowBuilder::makeDefaultTraits(bool stencil)
  52 {
  53     GraphicsContext::WindowingSystemInterface* wsi
  54         = osg::GraphicsContext::getWindowingSystemInterface();
  55     int w = fgGetInt("/sim/startup/xsize");
  56     int h = fgGetInt("/sim/startup/ysize");
  57     int bpp = fgGetInt("/sim/rendering/bits-per-pixel");
  58     bool alpha = fgGetBool("/sim/rendering/clouds3d-enable");
  59     bool fullscreen = fgGetBool("/sim/startup/fullscreen");
  60
  61     GraphicsContext::Traits* traits = new osg::GraphicsContext::Traits;
  62     traits->readDISPLAY();
  63     int cbits = (bpp <= 16) ?  5 :  8;
  64     int zbits = (bpp <= 16) ? 16 : 24;
  65     traits->red = traits->green = traits->blue = cbits;
  66     traits->depth = zbits;
  67     if (alpha)
  68         traits->alpha = 8;
  69     if (stencil)
  70         traits->stencil = 8;
  71     traits->doubleBuffer = true;
  72     traits->mipMapGeneration = true;
  73     traits->windowName = "FlightGear";
  74     // XXX should check per window too.
  75     traits->sampleBuffers = fgGetBool("/sim/rendering/multi-sample-buffers", traits->sampleBuffers);
  76     traits->samples = fgGetInt("/sim/rendering/multi-samples", traits->samples);
  77     traits->vsync = fgGetBool("/sim/rendering/vsync-enable", traits->vsync);
  78     if (fullscreen) {
  79         unsigned width = 0;
  80         unsigned height = 0;
  81         wsi->getScreenResolution(*traits, width, height);
  82         traits->windowDecoration = false;
  83         traits->width = width;
  84         traits->height = height;
  85         traits->supportsResize = false;
  86     } else {
  87         traits->windowDecoration = true;
  88         traits->width = w;
  89         traits->height = h;
  90 #if defined(WIN32) || defined(__APPLE__)
  91         // Ugly Hack, why does CW_USEDEFAULT works like phase of the moon?
  92         // Mac also needs this to show window frame, menubar and Docks
  93         traits->x = 100;
  94         traits->y = 100;
  95 #endif
  96         traits->supportsResize = true;
  97     }
  98     return traits;
  99 }
 100 }
 101
 102 namespace
 103 {
 104 // Helper functions that set a value based on a property if it exists,
 105 // returning 1 if the value was set.
 106
 107 inline int setFromProperty(string& place, const SGPropertyNode* node,
 108                             const char* name)
 109 {
 110     const SGPropertyNode* valNode = node->getNode(name);
 111     if (valNode) {
 112         place = valNode->getStringValue();
 113         return 1;
 114     }
 115     return 0;
 116 }
 117
 118 inline int setFromProperty(int& place, const SGPropertyNode* node,
 119                             const char* name)
 120 {
 121     const SGPropertyNode* valNode = node->getNode(name);
 122     if (valNode) {
 123         place = valNode->getIntValue();
 124         return 1;
 125     }
 126     return 0;
 127 }
 128
 129 inline int setFromProperty(bool& place, const SGPropertyNode* node,
 130                             const char* name)
 131 {
 132     const SGPropertyNode* valNode = node->getNode(name);
 133     if (valNode) {
 134         place = valNode->getBoolValue();
 135         return 1;
 136     }
 137     return 0;
 138 }
 139 }
 140
 141 namespace flightgear
 142 {
 143 GraphicsWindow* WindowBuilder::buildWindow(const SGPropertyNode* winNode)
 144 {
 145     GraphicsContext::WindowingSystemInterface* wsi
 146         = osg::GraphicsContext::getWindowingSystemInterface();
 147     WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
 148     string windowName;
 149     if (winNode->hasChild("window-name"))
 150         windowName = winNode->getStringValue("window-name");
 151     else if (winNode->hasChild("name"))
 152         windowName = winNode->getStringValue("name");
 153     GraphicsWindow* result = 0;
 154     if (!windowName.empty()) {
 155         result = wsa->findWindow(windowName);
 156         if (result)
 157             return result;
 158     }
 159     GraphicsContext::Traits* traits
 160         = new GraphicsContext::Traits(*defaultTraits);
 161     int traitsSet = setFromProperty(traits->hostName, winNode, "host-name");
 162     traitsSet |= setFromProperty(traits->displayNum, winNode, "display");
 163     traitsSet |= setFromProperty(traits->screenNum, winNode, "screen");
 164     const SGPropertyNode* fullscreenNode = winNode->getNode("fullscreen");
 165     if (fullscreenNode && fullscreenNode->getBoolValue()) {
 166         unsigned width = 0;
 167         unsigned height = 0;
 168         wsi->getScreenResolution(*traits, width, height);
 169         traits->windowDecoration = false;
 170         traits->width = width;
 171         traits->height = height;
 172         traits->supportsResize = false;
 173         traitsSet = 1;
 174     } else {
 175         int resizable = 0;
 176         resizable |= setFromProperty(traits->windowDecoration, winNode,
 177                                      "decoration");
 178         resizable |= setFromProperty(traits->width, winNode, "width");
 179         resizable |= setFromProperty(traits->height, winNode, "height");
 180         if (resizable) {
 181             traits->supportsResize = true;
 182             traitsSet = 1;
 183         }
 184         // Otherwise use default values.
 185     }
 186     traitsSet |= setFromProperty(traits->x, winNode, "x");
 187     traitsSet |= setFromProperty(traits->y, winNode, "y");
 188     if (!windowName.empty() && windowName != traits->windowName) {
 189         traits->windowName = windowName;
 190         traitsSet = 1;
 191     } else if (traitsSet) {
 192         traits->windowName = makeName("FlightGear", defaultCounter++);
 193     }
 194     bool drawGUI = false;
 195     traitsSet |= setFromProperty(drawGUI, winNode, "gui");
 196     if (traitsSet) {
 197         GraphicsContext* gc = GraphicsContext::createGraphicsContext(traits);
 198         if (gc) {
 199             GraphicsWindow* window = WindowSystemAdapter::getWSA()
 200                 ->registerWindow(gc, traits->windowName);
 201             if (drawGUI)
 202                 window->flags |= GraphicsWindow::GUI;
 203             return window;
 204         } else {
 205             return 0;
 206         }
 207     } else {
 208         // XXX What if the window has no traits, but does have a name?
 209         // We should create a "default window" registered with that name.
 210         return getDefaultWindow();
 211     }
 212 }
 213
 214 GraphicsWindow* WindowBuilder::getDefaultWindow()
 215 {
 216     GraphicsWindow* defaultWindow
 217         = WindowSystemAdapter::getWSA()->findWindow(defaultWindowName);
 218     if (defaultWindow)
 219         return defaultWindow;
 220     GraphicsContext::Traits* traits
 221         = new GraphicsContext::Traits(*defaultTraits);
 222     traits->windowName = "FlightGear";
 223     GraphicsContext* gc = GraphicsContext::createGraphicsContext(traits);
 224     if (gc) {
 225         defaultWindow = WindowSystemAdapter::getWSA()
 226             ->registerWindow(gc, defaultWindowName);
 227         return defaultWindow;
 228     } else {
 229         return 0;
 230     }
 231 }
 232 }