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src/Viewer/WindowBuilder.cxx
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334
src/Viewer/WindowBuilder.cxx
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// Copyright (C) 2008 Tim Moore
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#include "config.h"
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#include "WindowBuilder.hxx"
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#include "WindowSystemAdapter.hxx"
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#include <Main/fg_props.hxx>
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#include <osg/Version>
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#include <GUI/MessageBox.hxx>
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#include <sstream>
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#include <limits>
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#if defined(SG_MAC)
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#include <osgViewer/api/Cocoa/GraphicsWindowCocoa>
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#endif
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using namespace std;
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using namespace osg;
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namespace flightgear
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{
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string makeName(const string& prefix, int num)
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{
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stringstream stream;
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stream << prefix << num;
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return stream.str();
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}
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ref_ptr<WindowBuilder> WindowBuilder::windowBuilder;
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string WindowBuilder::defaultWindowName("FlightGear");
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// default to true (historical behaviour), we will clear the flag if
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// we run another GUI.
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bool WindowBuilder::poseAsStandaloneApp = true;
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void WindowBuilder::initWindowBuilder(bool stencil)
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{
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windowBuilder = new WindowBuilder(stencil);
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}
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WindowBuilder::WindowBuilder(bool stencil) : defaultCounter(0)
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{
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makeDefaultTraits(stencil);
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}
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void WindowBuilder::makeDefaultTraits(bool stencil)
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{
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GraphicsContext::WindowingSystemInterface* wsi
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= osg::GraphicsContext::getWindowingSystemInterface();
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#if defined(HAVE_QT) && OSG_VERSION_GREATER_THAN(3, 5, 9)
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if (usingQtGraphicsWindow) {
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// use the correct WSI for OpenSceneGraph >= 3.6
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wsi = osg::GraphicsContext::getWindowingSystemInterface("FlightGearQt5");
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}
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#endif
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defaultTraits = new osg::GraphicsContext::Traits;
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auto traits = defaultTraits.get();
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traits->readDISPLAY();
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if (traits->displayNum < 0)
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traits->displayNum = 0;
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if (traits->screenNum < 0)
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traits->screenNum = 0;
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int bpp = fgGetInt("/sim/rendering/bits-per-pixel");
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int cbits = (bpp <= 16) ? 5 : 8;
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int zbits = (bpp <= 16) ? 16 : 24;
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traits->red = traits->green = traits->blue = cbits;
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traits->depth = zbits;
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if (stencil)
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traits->stencil = 8;
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traits->doubleBuffer = true;
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traits->mipMapGeneration = true;
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traits->windowName = "FlightGear";
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// XXX should check per window too.
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traits->sampleBuffers = fgGetInt("/sim/rendering/multi-sample-buffers", traits->sampleBuffers);
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traits->samples = fgGetInt("/sim/rendering/multi-samples", traits->samples);
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traits->vsync = fgGetBool("/sim/rendering/vsync-enable", traits->vsync);
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const bool wantFullscreen = fgGetBool("/sim/startup/fullscreen");
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unsigned screenwidth = 0;
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unsigned screenheight = 0;
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// this is a deprecated method, should be screen-aware.
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wsi->getScreenResolution(*traits, screenwidth, screenheight);
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// handle fullscreen manually
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traits->windowDecoration = !wantFullscreen;
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if (!traits->windowDecoration) {
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// fullscreen
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traits->supportsResize = false;
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traits->width = screenwidth;
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traits->height = screenheight;
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SG_LOG(SG_VIEW,SG_DEBUG,"Using full screen size for window: " << screenwidth << " x " << screenheight);
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} else {
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// window
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int w = fgGetInt("/sim/startup/xsize");
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int h = fgGetInt("/sim/startup/ysize");
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traits->supportsResize = true;
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traits->width = w;
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traits->height = h;
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if ((w>0)&&(h>0))
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{
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traits->x = ((unsigned)w>screenwidth) ? 0 : (screenwidth-w)/3;
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traits->y = ((unsigned)h>screenheight) ? 0 : (screenheight-h)/3;
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}
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SG_LOG(SG_VIEW,SG_DEBUG,"Using initial window size: " << w << " x " << h);
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}
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}
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} // of namespace flightgear
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namespace
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{
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// Helper functions that set a value based on a property if it exists,
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// returning 1 if the value was set.
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inline int setFromProperty(string& place, const SGPropertyNode* node,
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const char* name)
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{
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const SGPropertyNode* valNode = node->getNode(name);
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if (valNode) {
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place = valNode->getStringValue();
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return 1;
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}
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return 0;
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}
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inline int setFromProperty(int& place, const SGPropertyNode* node,
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const char* name)
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{
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const SGPropertyNode* valNode = node->getNode(name);
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if (valNode) {
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place = valNode->getIntValue();
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return 1;
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}
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return 0;
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}
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inline int setFromProperty(bool& place, const SGPropertyNode* node,
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const char* name)
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{
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const SGPropertyNode* valNode = node->getNode(name);
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if (valNode) {
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place = valNode->getBoolValue();
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return 1;
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}
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return 0;
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}
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}
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namespace flightgear
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{
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void WindowBuilder::setFullscreenTraits(const SGPropertyNode* winNode, GraphicsContext::Traits* traits)
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{
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const SGPropertyNode* orrNode = winNode->getNode("overrideRedirect");
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bool overrideRedirect = orrNode && orrNode->getBoolValue();
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traits->overrideRedirect = overrideRedirect;
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traits->windowDecoration = false;
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unsigned int width = 0;
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unsigned int height = 0;
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auto wsi = osg::GraphicsContext::getWindowingSystemInterface();
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wsi->getScreenResolution(*traits, width, height);
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traits->width = width;
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traits->height = height;
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traits->supportsResize = false;
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traits->x = 0;
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traits->y = 0;
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}
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bool WindowBuilder::setWindowedTraits(const SGPropertyNode* winNode, GraphicsContext::Traits* traits)
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{
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bool customTraits = false;
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int resizable = 0;
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const SGPropertyNode* fullscreenNode = winNode->getNode("fullscreen");
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if (fullscreenNode && !fullscreenNode->getBoolValue())
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{
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traits->windowDecoration = true;
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resizable = 1;
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}
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resizable |= setFromProperty(traits->windowDecoration, winNode, "decoration");
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resizable |= setFromProperty(traits->width, winNode, "width");
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resizable |= setFromProperty(traits->height, winNode, "height");
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if (resizable) {
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traits->supportsResize = true;
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customTraits = true;
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}
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return customTraits;
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}
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void WindowBuilder::setMacPoseAsStandaloneApp(GraphicsContext::Traits* traits)
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{
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#if defined(SG_MAC)
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// this logic is unecessary if using a Qt window, since everything
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// plays together nicely
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int flags = osgViewer::GraphicsWindowCocoa::WindowData::CheckForEvents;
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// avoid both QApplication and OSG::CocoaViewer doing single-application
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// init (Apple menu, making front process, etc)
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if (poseAsStandaloneApp) {
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flags |= osgViewer::GraphicsWindowCocoa::WindowData::PoseAsStandaloneApp;
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}
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traits->inheritedWindowData = new osgViewer::GraphicsWindowCocoa::WindowData(flags);
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#endif
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}
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GraphicsWindow* WindowBuilder::buildWindow(const SGPropertyNode* winNode, bool isMainWindow)
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{
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WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
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string windowName;
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if (winNode->hasChild("window-name"))
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windowName = winNode->getStringValue("window-name");
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else if (winNode->hasChild("name"))
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windowName = winNode->getStringValue("name");
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if (isMainWindow) {
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SG_LOG(SG_GENERAL, SG_DEBUG, "Changing defaultWindowName from "
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<< defaultWindowName << " to " << windowName);
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defaultWindowName = windowName;
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}
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GraphicsWindow* result = 0;
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if (!windowName.empty()) {
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// look for an existing window and return that
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result = wsa->findWindow(windowName);
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if (result)
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return result;
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}
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auto traits = new GraphicsContext::Traits(*defaultTraits);
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// Attempt to share context with the window that was created first
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if (!wsa->windows.empty())
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traits->sharedContext = wsa->windows.front()->gc;
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int traitsSet = setFromProperty(traits->hostName, winNode, "host-name");
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traitsSet |= setFromProperty(traits->displayNum, winNode, "display");
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traitsSet |= setFromProperty(traits->screenNum, winNode, "screen");
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const SGPropertyNode* fullscreenNode = winNode->getNode("fullscreen");
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if (fullscreenNode && fullscreenNode->getBoolValue()) {
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setFullscreenTraits(winNode, traits);
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traitsSet = 1;
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} else {
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traitsSet |= setWindowedTraits(winNode, traits);
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}
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traitsSet |= setFromProperty(traits->x, winNode, "x");
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traitsSet |= setFromProperty(traits->y, winNode, "y");
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if (!windowName.empty() && windowName != traits->windowName) {
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traits->windowName = windowName;
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traitsSet = 1;
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} else if (traitsSet) {
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traits->windowName = makeName("FlightGear", defaultCounter++);
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}
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setMacPoseAsStandaloneApp(traits);
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bool drawGUI = false;
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traitsSet |= setFromProperty(drawGUI, winNode, "gui");
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if (traitsSet) {
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GraphicsContext* gc = GraphicsContext::createGraphicsContext(traits);
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if (gc) {
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GraphicsWindow* window = WindowSystemAdapter::getWSA()
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->registerWindow(gc, traits->windowName);
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if (drawGUI)
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window->flags |= GraphicsWindow::GUI;
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return window;
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} else {
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return 0;
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}
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} else {
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// XXX What if the window has no traits, but does have a name?
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// We should create a "default window" registered with that name.
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return getDefaultWindow();
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}
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}
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GraphicsWindow* WindowBuilder::getDefaultWindow()
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{
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GraphicsWindow* defaultWindow
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= WindowSystemAdapter::getWSA()->findWindow(defaultWindowName);
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if (defaultWindow)
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return defaultWindow;
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// create if it, if necessary
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GraphicsContext::Traits* traits
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= new GraphicsContext::Traits(*defaultTraits);
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traits->windowName = "FlightGear";
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setMacPoseAsStandaloneApp(traits);
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// this may be the point, where we discover OpenGL is broken on the
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// system.
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GraphicsContext* gc = GraphicsContext::createGraphicsContext(traits);
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if (!gc) {
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flightgear::fatalMessageBoxThenExit("Unable to create window",
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"FlightGear was unable to create a window supporting 3D rendering (OpenGL). "
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"This is normally due to outdated graphics drivers, please check if updates are available. ",
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"Depending on your OS and graphics chipset, updates might come from AMD, nVidia or Intel.");
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return nullptr; // unreachable anyway
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}
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defaultWindow = WindowSystemAdapter::getWSA()->registerWindow(gc, defaultWindowName);
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return defaultWindow;
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}
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void WindowBuilder::setPoseAsStandaloneApp(bool b)
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{
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poseAsStandaloneApp = b;
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}
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} // of namespace flightgear
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