mirror of https://github.com/OpenMW/openmw.git
Use SDL to create the window
No input nor event loop handling yet, so the window will "stop responding" after a few seconds. Thanks to KittyCat for the GraphicsWindowSDL2 code.pull/638/head
scrawl
10 years ago
parent
7a3bc69df7
commit
375b736e74
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#include "sdlgraphicswindow.hpp"
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#include <SDL_video.h>
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#include <osg/DeleteHandler>
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namespace SDLUtil
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{
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GraphicsWindowSDL2::~GraphicsWindowSDL2()
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{
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close(true);
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}
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bool GraphicsWindowSDL2::setWindowDecorationImplementation(bool flag)
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{
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if(!mWindow) return false;
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SDL_SetWindowBordered(mWindow, flag ? SDL_TRUE : SDL_FALSE);
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return true;
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}
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bool GraphicsWindowSDL2::setWindowRectangleImplementation(int x, int y, int width, int height)
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{
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if(!mWindow) return false;
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SDL_SetWindowPosition(mWindow, x, y);
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SDL_SetWindowSize(mWindow, width, height);
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return true;
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}
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void GraphicsWindowSDL2::setWindowName(const std::string &name)
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{
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if(!mWindow) return;
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SDL_SetWindowTitle(mWindow, name.c_str());
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_traits->windowName = name;
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}
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void GraphicsWindowSDL2::setCursor(MouseCursor mouseCursor)
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{
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_traits->useCursor = false;
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}
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void GraphicsWindowSDL2::init()
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{
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if(mValid) return;
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if(!_traits.valid())
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return;
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// getEventQueue()->setCurrentEventState(osgGA::GUIEventAdapter::getAccumulatedEventState().get());
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WindowData *inheritedWindowData = dynamic_cast<WindowData*>(_traits->inheritedWindowData.get());
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mWindow = inheritedWindowData ? inheritedWindowData->mWindow : NULL;
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mOwnsWindow = (mWindow == 0);
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if(mOwnsWindow)
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{
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OSG_NOTICE<<"Error: No SDL window provided."<<std::endl;
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return;
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}
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// SDL will change the current context when it creates a new one, so we
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// have to get the current one to be able to restore it afterward.
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SDL_Window *oldWin = SDL_GL_GetCurrentWindow();
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SDL_GLContext oldCtx = SDL_GL_GetCurrentContext();
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mContext = SDL_GL_CreateContext(mWindow);
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if(!mContext)
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{
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OSG_NOTICE<< "Error: Unable to create OpenGL graphics context: "<<SDL_GetError() <<std::endl;
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return;
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}
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setSyncToVBlank(_traits->vsync);
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SDL_GL_MakeCurrent(oldWin, oldCtx);
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mValid = true;
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getEventQueue()->syncWindowRectangleWithGraphcisContext();
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}
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bool GraphicsWindowSDL2::realizeImplementation()
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{
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if(mRealized)
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{
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OSG_NOTICE<< "GraphicsWindowSDL2::realizeImplementation() Already realized" <<std::endl;
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return true;
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}
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if(!mValid) init();
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if(!mValid) return false;
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SDL_ShowWindow(mWindow);
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getEventQueue()->syncWindowRectangleWithGraphcisContext();
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mRealized = true;
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return true;
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}
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bool GraphicsWindowSDL2::makeCurrentImplementation()
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{
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if(!mRealized)
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{
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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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return SDL_GL_MakeCurrent(mWindow, mContext)==0;
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}
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bool GraphicsWindowSDL2::releaseContextImplementation()
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{
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if(!mRealized)
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{
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OSG_NOTICE<< "Warning: GraphicsWindow not realized, cannot do releaseContext." <<std::endl;
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return false;
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}
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return SDL_GL_MakeCurrent(NULL, NULL)==0;
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}
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void GraphicsWindowSDL2::closeImplementation()
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{
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// OSG_NOTICE<<"Closing GraphicsWindowSDL2"<<std::endl;
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if(mContext)
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SDL_GL_DeleteContext(mContext);
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mContext = NULL;
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if(mWindow && mOwnsWindow)
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SDL_DestroyWindow(mWindow);
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mWindow = NULL;
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mValid = false;
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mRealized = false;
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}
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void GraphicsWindowSDL2::swapBuffersImplementation()
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{
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if(!mRealized) return;
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//OSG_NOTICE<< "swapBuffersImplementation "<<this<<" "<<OpenThreads::Thread::CurrentThread()<<std::endl;
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SDL_GL_SwapWindow(mWindow);
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}
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void GraphicsWindowSDL2::setSyncToVBlank(bool on)
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{
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SDL_GL_SetSwapInterval(on ? 1 : 0);
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}
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void GraphicsWindowSDL2::raiseWindow()
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{
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SDL_RaiseWindow(mWindow);
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}
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class SDL2WindowingSystemInterface : public osg::GraphicsContext::WindowingSystemInterface
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{
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public:
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SDL2WindowingSystemInterface()
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{
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OSG_INFO<< "SDL2WindowingSystemInterface()" <<std::endl;
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}
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virtual ~SDL2WindowingSystemInterface()
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{
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if(osg::Referenced::getDeleteHandler())
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{
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osg::Referenced::getDeleteHandler()->setNumFramesToRetainObjects(0);
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osg::Referenced::getDeleteHandler()->flushAll();
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}
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//OSG_NOTICE<< "~SDL2WindowingSystemInterface()" <<std::endl;
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}
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virtual unsigned int getNumScreens(const osg::GraphicsContext::ScreenIdentifier&/*si*/)
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{
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return SDL_GetNumVideoDisplays();
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}
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virtual void getScreenSettings(const osg::GraphicsContext::ScreenIdentifier &si, osg::GraphicsContext::ScreenSettings &resolution)
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{
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SDL_DisplayMode mode;
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if(SDL_GetCurrentDisplayMode(si.screenNum, &mode) == 0)
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{
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int bpp = 32;
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Uint32 rmask, gmask, bmask, amask;
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SDL_PixelFormatEnumToMasks(mode.format, &bpp, &rmask, &gmask, &bmask, &amask);
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resolution.width = mode.w;
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resolution.height = mode.h;
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resolution.colorDepth = bpp;
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resolution.refreshRate = mode.refresh_rate;
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}
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else
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{
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OSG_NOTICE<< "Unable to query screen \""<<si.screenNum<<"\"." <<std::endl;
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resolution.width = 0;
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resolution.height = 0;
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resolution.colorDepth = 0;
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resolution.refreshRate = 0;
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}
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}
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virtual bool setScreenSettings(const osg::GraphicsContext::ScreenIdentifier&/*si*/, const osg::GraphicsContext::ScreenSettings&/*resolution*/)
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{
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// FIXME: SDL sets a new video mode by having the fullscreen flag on an
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// appropriately-sized window, rather than changing it 'raw'.
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return false;
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}
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virtual void enumerateScreenSettings(const osg::GraphicsContext::ScreenIdentifier &si, osg::GraphicsContext::ScreenSettingsList &resolutionList)
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{
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osg::GraphicsContext::ScreenSettingsList().swap(resolutionList);
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int num_modes = SDL_GetNumDisplayModes(si.screenNum);
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resolutionList.reserve(num_modes);
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for(int i = 0;i < num_modes;++i)
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{
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SDL_DisplayMode mode;
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if(SDL_GetDisplayMode(si.screenNum, i, &mode) != 0)
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{
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OSG_NOTICE<< "Failed to get info for display mode "<<i <<std::endl;
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continue;
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}
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int bpp = 32;
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Uint32 rmask, gmask, bmask, amask;
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if(SDL_PixelFormatEnumToMasks(mode.format, &bpp, &rmask, &gmask, &bmask, &amask) == SDL_FALSE)
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{
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OSG_NOTICE<< "Failed to get pixel format info for format ID "<<mode.format <<std::endl;
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continue;
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}
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resolutionList.push_back(osg::GraphicsContext::ScreenSettings(mode.w, mode.h, mode.refresh_rate, bpp));
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}
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if(resolutionList.empty())
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{
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OSG_NOTICE<< "SDL2WindowingSystemInterface::enumerateScreenSettings() not supported." <<std::endl;
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}
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}
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virtual osg::GraphicsContext* createGraphicsContext(osg::GraphicsContext::Traits *traits)
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{
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// No PBuffer support (you should use FBOs anyway)
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if(traits->pbuffer)
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return NULL;
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osg::ref_ptr<GraphicsWindowSDL2> window = new GraphicsWindowSDL2(traits);
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if(window->valid()) return window.release();
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return NULL;
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}
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};
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void setupWindowingSystemInterface()
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{
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osg::GraphicsContext::setWindowingSystemInterface(new SDL2WindowingSystemInterface);
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}
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} // namespace TK
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@ -0,0 +1,108 @@
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#ifndef OSGGRAPHICSWINDOW_H
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#define OSGGRAPHICSWINDOW_H
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#include <SDL.h>
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#include <osgViewer/GraphicsWindow>
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namespace SDLUtil
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{
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class GraphicsWindowSDL2 : public osgViewer::GraphicsWindow
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{
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SDL_Window* mWindow;
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SDL_GLContext mContext;
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bool mValid;
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bool mRealized;
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bool mOwnsWindow;
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void init();
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virtual ~GraphicsWindowSDL2();
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public:
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GraphicsWindowSDL2(osg::GraphicsContext::Traits *traits)
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: mWindow(0)
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, mContext(0)
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, mValid(false)
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, mRealized(false)
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, mOwnsWindow(false)
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{
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_traits = traits;
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init();
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if(valid())
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{
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setState(new osg::State);
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getState()->setGraphicsContext(this);
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if(_traits.valid() && _traits->sharedContext.valid())
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{
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getState()->setContextID(_traits->sharedContext->getState()->getContextID());
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incrementContextIDUsageCount(getState()->getContextID());
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}
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else
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{
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getState()->setContextID(osg::GraphicsContext::createNewContextID());
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}
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}
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}
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virtual bool isSameKindAs(const Object* object) const { return dynamic_cast<const GraphicsWindowSDL2*>(object)!=0; }
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virtual const char* libraryName() const { return "osgViewer"; }
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virtual const char* className() const { return "GraphicsWindowSDL2"; }
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virtual bool valid() const { return mValid; }
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/** Realise the GraphicsContext.*/
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virtual bool realizeImplementation();
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/** Return true if the graphics context has been realised and is ready to use.*/
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virtual bool isRealizedImplementation() const { return mRealized; }
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/** Close the graphics context.*/
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virtual void closeImplementation();
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/** Make this graphics context current.*/
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virtual bool makeCurrentImplementation();
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/** Release the graphics context.*/
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virtual bool releaseContextImplementation();
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/** Swap the front and back buffers.*/
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virtual void swapBuffersImplementation();
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/** Set sync-to-vblank. */
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virtual void setSyncToVBlank(bool on);
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/** Set Window decoration.*/
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virtual bool setWindowDecorationImplementation(bool flag);
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/** Raise specified window */
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virtual void raiseWindow();
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/** Set the window's position and size.*/
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virtual bool setWindowRectangleImplementation(int x, int y, int width, int height);
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/** Set the name of the window */
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virtual void setWindowName(const std::string &name);
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/** Set mouse cursor to a specific shape.*/
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virtual void setCursor(MouseCursor cursor);
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/** WindowData is used to pass in the SDL2 window handle attached the GraphicsContext::Traits structure. */
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struct WindowData : public osg::Referenced
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{
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WindowData(SDL_Window *window) : mWindow(window)
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{ }
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SDL_Window *mWindow;
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};
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};
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void setupWindowingSystemInterface();
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} // namespace TK
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#endif /* OSGGRAPHICSWINDOW_H */
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