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     if (traits->displayNum < 0)
  64         traits->displayNum = 0;
  65     if (traits->screenNum < 0)
  66         traits->screenNum = 0;
  67     int cbits = (bpp <= 16) ?  5 :  8;
  68     int zbits = (bpp <= 16) ? 16 : 24;
  69     traits->red = traits->green = traits->blue = cbits;
  70     traits->depth = zbits;
  71     if (alpha)
  72         traits->alpha = 8;
  73     if (stencil)
  74         traits->stencil = 8;
  75     traits->doubleBuffer = true;
  76     traits->mipMapGeneration = true;
  77     traits->windowName = "FlightGear";
  78     // XXX should check per window too.
  79     traits->sampleBuffers = fgGetBool("/sim/rendering/multi-sample-buffers", traits->sampleBuffers);
  80     traits->samples = fgGetInt("/sim/rendering/multi-samples", traits->samples);
  81     traits->vsync = fgGetBool("/sim/rendering/vsync-enable", traits->vsync);
  82     if (fullscreen) {
  83         unsigned width = 0;
  84         unsigned height = 0;
  85         wsi->getScreenResolution(*traits, width, height);
  86         traits->windowDecoration = false;
  87         traits->width = width;
  88         traits->height = height;
  89         traits->supportsResize = false;
  90     } else {
  91         traits->windowDecoration = true;
  92         traits->width = w;
  93         traits->height = h;
  94 #if defined(WIN32) || defined(__APPLE__)
  95         // Ugly Hack, why does CW_USEDEFAULT works like phase of the moon?
  96         // Mac also needs this to show window frame, menubar and Docks
  97         traits->x = 100;
  98         traits->y = 100;
  99 #endif
 100         traits->supportsResize = true;
 101     }
 102     return traits;
 103 }
 104 }
 105
 106 namespace
 107 {
 108 // Helper functions that set a value based on a property if it exists,
 109 // returning 1 if the value was set.
 110
 111 inline int setFromProperty(string& place, const SGPropertyNode* node,
 112                             const char* name)
 113 {
 114     const SGPropertyNode* valNode = node->getNode(name);
 115     if (valNode) {
 116         place = valNode->getStringValue();
 117         return 1;
 118     }
 119     return 0;
 120 }
 121
 122 inline int setFromProperty(int& place, const SGPropertyNode* node,
 123                             const char* name)
 124 {
 125     const SGPropertyNode* valNode = node->getNode(name);
 126     if (valNode) {
 127         place = valNode->getIntValue();
 128         return 1;
 129     }
 130     return 0;
 131 }
 132
 133 inline int setFromProperty(bool& place, const SGPropertyNode* node,
 134                             const char* name)
 135 {
 136     const SGPropertyNode* valNode = node->getNode(name);
 137     if (valNode) {
 138         place = valNode->getBoolValue();
 139         return 1;
 140     }
 141     return 0;
 142 }
 143 }
 144
 145 namespace flightgear
 146 {
 147 GraphicsWindow* WindowBuilder::buildWindow(const SGPropertyNode* winNode)
 148 {
 149     GraphicsContext::WindowingSystemInterface* wsi
 150         = osg::GraphicsContext::getWindowingSystemInterface();
 151     WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
 152     string windowName;
 153     if (winNode->hasChild("window-name"))
 154         windowName = winNode->getStringValue("window-name");
 155     else if (winNode->hasChild("name"))
 156         windowName = winNode->getStringValue("name");
 157     GraphicsWindow* result = 0;
 158     if (!windowName.empty()) {
 159         result = wsa->findWindow(windowName);
 160         if (result)
 161             return result;
 162     }
 163     GraphicsContext::Traits* traits
 164         = new GraphicsContext::Traits(*defaultTraits);
 165     int traitsSet = setFromProperty(traits->hostName, winNode, "host-name");
 166     traitsSet |= setFromProperty(traits->displayNum, winNode, "display");
 167     traitsSet |= setFromProperty(traits->screenNum, winNode, "screen");
 168     const SGPropertyNode* fullscreenNode = winNode->getNode("fullscreen");
 169     if (fullscreenNode && fullscreenNode->getBoolValue()) {
 170         unsigned width = 0;
 171         unsigned height = 0;
 172         wsi->getScreenResolution(*traits, width, height);
 173         traits->windowDecoration = false;
 174         traits->width = width;
 175         traits->height = height;
 176         traits->supportsResize = false;
 177         traitsSet = 1;
 178     } else {
 179         int resizable = 0;
 180         resizable |= setFromProperty(traits->windowDecoration, winNode,
 181                                      "decoration");
 182         resizable |= setFromProperty(traits->width, winNode, "width");
 183         resizable |= setFromProperty(traits->height, winNode, "height");
 184         if (resizable) {
 185             traits->supportsResize = true;
 186             traitsSet = 1;
 187         }
 188         // Otherwise use default values.
 189     }
 190     traitsSet |= setFromProperty(traits->x, winNode, "x");
 191     traitsSet |= setFromProperty(traits->y, winNode, "y");
 192     if (!windowName.empty() && windowName != traits->windowName) {
 193         traits->windowName = windowName;
 194         traitsSet = 1;
 195     } else if (traitsSet) {
 196         traits->windowName = makeName("FlightGear", defaultCounter++);
 197     }
 198     bool drawGUI = false;
 199     traitsSet |= setFromProperty(drawGUI, winNode, "gui");
 200     if (traitsSet) {
 201         GraphicsContext* gc = GraphicsContext::createGraphicsContext(traits);
 202         if (gc) {
 203             GraphicsWindow* window = WindowSystemAdapter::getWSA()
 204                 ->registerWindow(gc, traits->windowName);
 205             if (drawGUI)
 206                 window->flags |= GraphicsWindow::GUI;
 207             return window;
 208         } else {
 209             return 0;
 210         }
 211     } else {
 212         // XXX What if the window has no traits, but does have a name?
 213         // We should create a "default window" registered with that name.
 214         return getDefaultWindow();
 215     }
 216 }
 217
 218 GraphicsWindow* WindowBuilder::getDefaultWindow()
 219 {
 220     GraphicsWindow* defaultWindow
 221         = WindowSystemAdapter::getWSA()->findWindow(defaultWindowName);
 222     if (defaultWindow)
 223         return defaultWindow;
 224     GraphicsContext::Traits* traits
 225         = new GraphicsContext::Traits(*defaultTraits);
 226     traits->windowName = "FlightGear";
 227     GraphicsContext* gc = GraphicsContext::createGraphicsContext(traits);
 228     if (gc) {
 229         defaultWindow = WindowSystemAdapter::getWSA()
 230             ->registerWindow(gc, defaultWindowName);
 231         return defaultWindow;
 232     } else {
 233         return 0;
 234     }
 235 }
 236 }