Added beginnings of osgViewer::PixelBufferX11
This commit is contained in:
Robert Osfield
331
src/osgViewer/PixelBufferX11.cpp
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331
src/osgViewer/PixelBufferX11.cpp
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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/* Note, elements of PixelBufferX11 have used Prodcer/RenderSurface_X11.cpp as both
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* a guide to use of X11/GLX and copiying directly in the case of setBorder().
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* These elements are license under OSGPL as above, with Copyright (C) 2001-2004 Don Burns.
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*/
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#include <osgViewer/api/X11/PixelBufferX11>
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#include <osgViewer/api/X11/GraphicsWindowX11>
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#include <X11/Xlib.h>
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#include <unistd.h>
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using namespace osgViewer;
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PixelBufferX11::~PixelBufferX11()
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{
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close(true);
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}
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bool PixelBufferX11::createVisualInfo()
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{
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typedef std::vector<int> Attributes;
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Attributes attributes;
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attributes.push_back(GLX_USE_GL);
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attributes.push_back(GLX_RGBA);
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if (_traits->doubleBuffer) attributes.push_back(GLX_DOUBLEBUFFER);
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attributes.push_back(GLX_RED_SIZE); attributes.push_back(_traits->red);
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attributes.push_back(GLX_GREEN_SIZE); attributes.push_back(_traits->green);
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attributes.push_back(GLX_BLUE_SIZE); attributes.push_back(_traits->blue);
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attributes.push_back(GLX_DEPTH_SIZE); attributes.push_back(_traits->depth);
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if (_traits->alpha) { attributes.push_back(GLX_ALPHA_SIZE); attributes.push_back(_traits->alpha); }
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if (_traits->stencil) { attributes.push_back(GLX_STENCIL_SIZE); attributes.push_back(_traits->stencil); }
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#if defined(GLX_SAMPLE_BUFFERS) && defined (GLX_SAMPLES)
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if (_traits->sampleBuffers) { attributes.push_back(GLX_SAMPLE_BUFFERS); attributes.push_back(_traits->sampleBuffers); }
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if (_traits->sampleBuffers) { attributes.push_back(GLX_SAMPLES); attributes.push_back(_traits->samples); }
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#endif
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// TODO
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// GLX_AUX_BUFFERS
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// GLX_ACCUM_RED_SIZE
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// GLX_ACCUM_GREEN_SIZE
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attributes.push_back(None);
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_visualInfo = glXChooseVisual( _display, _traits->screenNum, &(attributes.front()) );
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return _visualInfo != 0;
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}
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void PixelBufferX11::init()
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{
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if (_initialized) return;
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if (!_traits)
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{
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_valid = false;
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return;
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}
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if (_traits->target != 0)
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{
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// we don't support Pbuffer render to texture under GLX.
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_valid = false;
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return;
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}
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_display = XOpenDisplay(_traits->displayName().c_str());
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unsigned int screen = _traits->screenNum;
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if (!_display)
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{
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osg::notify(osg::NOTICE)<<"Error: Unable to open display \"" << XDisplayName(_traits->displayName().c_str()) << "\"."<<std::endl;
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_valid = false;
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return;
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}
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// Query for GLX extension
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int errorBase, eventBase;
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if( glXQueryExtension( _display, &errorBase, &eventBase) == False )
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{
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osg::notify(osg::NOTICE)<<"Error: " << XDisplayName(_traits->displayName().c_str()) <<" has no GLX extension." << std::endl;
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XCloseDisplay( _display );
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_display = 0;
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_valid = false;
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return;
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}
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// osg::notify(osg::NOTICE)<<"GLX extension, errorBase="<<errorBase<<" eventBase="<<eventBase<<std::endl;
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if (!createVisualInfo())
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{
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_traits->red /= 2;
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_traits->green /= 2;
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_traits->blue /= 2;
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_traits->alpha /= 2;
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_traits->depth /= 2;
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osg::notify(osg::INFO)<<"Relaxing traits"<<std::endl;
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if (!createVisualInfo())
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{
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osg::notify(osg::NOTICE)<<"Error: Not able to create requested visual." << std::endl;
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XCloseDisplay( _display );
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_display = 0;
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_valid = false;
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return;
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}
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}
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GLXContext sharedContextGLX = NULL;
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// get any shared GLX contexts
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GraphicsWindowX11* graphicsWindowX11 = dynamic_cast<GraphicsWindowX11*>(_traits->sharedContext);
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if (graphicsWindowX11)
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{
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sharedContextGLX = graphicsWindowX11->getGLXContext();
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}
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else
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{
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PixelBufferX11* pixelBufferX11 = dynamic_cast<PixelBufferX11*>(_traits->sharedContext);
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if (pixelBufferX11)
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{
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sharedContextGLX = pixelBufferX11->getGLXContext();
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}
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}
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_glxContext = glXCreateContext( _display, _visualInfo, sharedContextGLX, True );
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if (!_glxContext)
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{
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osg::notify(osg::NOTICE)<<"Error: Unable to create OpenGL graphics context."<<std::endl;
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XCloseDisplay( _display );
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_display = 0;
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_valid = false;
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return;
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}
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_parent = RootWindow( _display, screen );
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XWindowAttributes watt;
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XGetWindowAttributes( _display, _parent, &watt );
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// unsigned int parentWindowHeight = watt.height;
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XSetWindowAttributes swatt;
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swatt.colormap = XCreateColormap( _display, _parent, _visualInfo->visual, AllocNone);
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//swatt.colormap = DefaultColormap( _dpy, 10 );
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swatt.background_pixel = 0;
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swatt.border_pixel = 0;
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swatt.event_mask = 0;
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unsigned long mask = CWBackPixel | CWBorderPixel | CWEventMask | CWColormap;
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bool overrideRedirect = false;
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if (overrideRedirect)
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{
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swatt.override_redirect = true;
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mask |= CWOverrideRedirect;
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}
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_window = XCreateWindow( _display, _parent,
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_traits->x,
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_traits->y,
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_traits->width, _traits->height, 0,
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_visualInfo->depth, InputOutput,
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_visualInfo->visual, mask, &swatt );
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if (!_window)
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{
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osg::notify(osg::NOTICE)<<"Error: Unable to create Window."<<std::endl;
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XCloseDisplay( _display );
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_display = 0;
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_glxContext = 0;
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_valid = false;
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return;
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}
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XFlush( _display );
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XSync( _display, 0 );
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// now update the window dimensions to account for any size changes made by the window manager,
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XGetWindowAttributes( _display, _window, &watt );
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if (_traits->width != watt.width && _traits->height != watt.height)
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{
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resized( _traits->x, _traits->y, _traits->width, _traits->height );
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}
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_valid = true;
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_initialized = true;
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}
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bool PixelBufferX11::realizeImplementation()
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{
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if (_realized)
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{
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osg::notify(osg::NOTICE)<<"PixelBufferX11::realizeImplementation() Already realized"<<std::endl;
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return true;
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}
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if (!_initialized) init();
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if (!_initialized) return false;
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XMapWindow( _display, _window );
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// Window temp = _window;
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// XSetWMColormapWindows( _display, _window, &temp, 1);
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_realized = true;
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return true;
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}
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bool PixelBufferX11::makeCurrentImplementation()
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{
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if (!_realized)
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{
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osg::notify(osg::NOTICE)<<"Warning: GraphicsWindow not realized, cannot do makeCurrent."<<std::endl;
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return false;
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}
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osg::notify(osg::NOTICE)<<"PixelBufferX11::makeCurrentImplementation "<<this<<" "<<OpenThreads::Thread::CurrentThread()<<std::endl;
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osg::notify(osg::NOTICE)<<" glXMakeCurrent ("<<_display<<","<<_window<<","<<_glxContext<<std::endl;
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return glXMakeCurrent( _display, _window, _glxContext )==True;
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}
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bool PixelBufferX11::makeContextCurrentImplementation(osg::GraphicsContext* readContext)
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{
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osg::notify(osg::NOTICE)<<"PixelBufferX11::makeContextCurrentImplementation() not implementation yet."<<std::endl;
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makeCurrentImplementation();
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}
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bool PixelBufferX11::releaseContextImplementation()
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{
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if (!_realized)
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{
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osg::notify(osg::NOTICE)<<"Warning: GraphicsWindow not realized, cannot do makeCurrent."<<std::endl;
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return false;
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}
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osg::notify(osg::NOTICE)<<"PixelBufferX11::releaseContextImplementation() "<<this<<" "<<OpenThreads::Thread::CurrentThread()<<std::endl;
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osg::notify(osg::NOTICE)<<" glXMakeCurrent ("<<_display<<std::endl;
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return glXMakeCurrent( _display, None, NULL )==True;
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}
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void PixelBufferX11::bindPBufferToTextureImplementation(GLenum buffer)
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{
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osg::notify(osg::NOTICE)<<"PixelBufferX11::bindPBufferToTextureImplementation() not implementation yet."<<std::endl;
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}
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void PixelBufferX11::closeImplementation()
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{
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// osg::notify(osg::NOTICE)<<"Closing PixelBufferX11"<<std::endl;
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if (_display)
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{
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if (_glxContext)
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{
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glXDestroyContext(_display, _glxContext );
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}
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if (_window)
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{
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XDestroyWindow(_display, _window);
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}
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XFlush( _display );
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XSync( _display,0 );
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}
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_window = 0;
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_parent = 0;
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_glxContext = 0;
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if (_visualInfo)
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{
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XFree(_visualInfo);
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_visualInfo = 0;
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}
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if (_display)
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{
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XCloseDisplay( _display );
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_display = 0;
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}
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_initialized = false;
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_realized = false;
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_valid = false;
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}
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void PixelBufferX11::swapBuffersImplementation()
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{
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if (!_realized) return;
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osg::notify(osg::NOTICE)<<"PixelBufferX11::swapBuffersImplementation "<<this<<" "<<OpenThreads::Thread::CurrentThread()<<std::endl;
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glXSwapBuffers(_display, _window);
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}
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