diff options
Diffstat (limited to 'vcl/source/opengl/x11/context.cxx')
| -rw-r--r-- | vcl/source/opengl/x11/context.cxx | 519 |
1 files changed, 519 insertions, 0 deletions
diff --git a/vcl/source/opengl/x11/context.cxx b/vcl/source/opengl/x11/context.cxx new file mode 100644 index 000000000..97822b310 --- /dev/null +++ b/vcl/source/opengl/x11/context.cxx @@ -0,0 +1,519 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#include <memory> +#include <vcl/lazydelete.hxx> +#include <vcl/syschild.hxx> + +#include <svdata.hxx> + +#include <unx/saldisp.hxx> +#include <unx/salframe.h> +#include <unx/salgdi.h> +#include <unx/salinst.h> +#include <unx/salvd.h> +#include <unx/x11/xlimits.hxx> + +#include <opengl/zone.hxx> + +#include <vcl/opengl/OpenGLContext.hxx> +#include <vcl/opengl/OpenGLHelper.hxx> +#include <sal/log.hxx> +#include <o3tl/string_view.hxx> + +static std::vector<GLXContext> g_vShareList; +static bool g_bAnyCurrent; + +namespace { + +class X11OpenGLContext : public OpenGLContext +{ +public: + virtual void initWindow() override; +private: + GLX11Window m_aGLWin; + virtual const GLWindow& getOpenGLWindow() const override { return m_aGLWin; } + virtual GLWindow& getModifiableOpenGLWindow() override { return m_aGLWin; } + virtual bool ImplInit() override; + void initGLWindow(Visual* pVisual); + virtual SystemWindowData generateWinData(vcl::Window* pParent, bool bRequestLegacyContext) override; + virtual void makeCurrent() override; + virtual void destroyCurrentContext() override; + virtual bool isCurrent() override; + virtual bool isAnyCurrent() override; + virtual void sync() override; + virtual void resetCurrent() override; + virtual void swapBuffers() override; +}; + +#ifdef DBG_UTIL + int unxErrorHandler(Display* dpy, XErrorEvent* event) + { + char err[256]; + char req[256]; + char minor[256]; + XGetErrorText(dpy, event->error_code, err, 256); + XGetErrorText(dpy, event->request_code, req, 256); + XGetErrorText(dpy, event->minor_code, minor, 256); + SAL_WARN("vcl.opengl", "Error: " << err << ", Req: " << req << ", Minor: " << minor); + return 0; + } +#endif + + typedef int (*errorHandler)(Display* /*dpy*/, XErrorEvent* /*evnt*/); + + class TempErrorHandler + { + private: + errorHandler oldErrorHandler; + Display* mdpy; + + public: + TempErrorHandler(Display* dpy, errorHandler newErrorHandler) + : oldErrorHandler(nullptr) + , mdpy(dpy) + { + if (mdpy) + { + XLockDisplay(dpy); + XSync(dpy, false); + oldErrorHandler = XSetErrorHandler(newErrorHandler); + } + } + + ~TempErrorHandler() + { + if (mdpy) + { + // sync so that we possibly get an XError + glXWaitGL(); + XSync(mdpy, false); + XSetErrorHandler(oldErrorHandler); + XUnlockDisplay(mdpy); + } + } + }; + + bool errorTriggered; + int oglErrorHandler( Display* /*dpy*/, XErrorEvent* /*evnt*/ ) + { + errorTriggered = true; + + return 0; + } + + GLXFBConfig* getFBConfig(Display* dpy, Window win, int& nBestFBC) + { + OpenGLZone aZone; + + if( dpy == nullptr || !glXQueryExtension( dpy, nullptr, nullptr ) ) + return nullptr; + + VCL_GL_INFO("window: " << win); + + XWindowAttributes xattr; + if( !XGetWindowAttributes( dpy, win, &xattr ) ) + { + SAL_WARN("vcl.opengl", "Failed to get window attributes for fbconfig " << win); + xattr.screen = nullptr; + xattr.visual = nullptr; + } + + int screen = XScreenNumberOfScreen( xattr.screen ); + + // TODO: moggi: Select colour channel depth based on visual attributes, not hardcoded */ + static int visual_attribs[] = + { + GLX_DOUBLEBUFFER, True, + GLX_X_RENDERABLE, True, + GLX_RED_SIZE, 8, + GLX_GREEN_SIZE, 8, + GLX_BLUE_SIZE, 8, + GLX_ALPHA_SIZE, 8, + GLX_DEPTH_SIZE, 24, + GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR, + None + }; + + int fbCount = 0; + GLXFBConfig* pFBC = glXChooseFBConfig( dpy, + screen, + visual_attribs, &fbCount ); + + if(!pFBC) + { + SAL_WARN("vcl.opengl", "no suitable fb format found"); + return nullptr; + } + + int best_num_samp = -1; + for(int i = 0; i < fbCount; ++i) + { + XVisualInfo* pVi = glXGetVisualFromFBConfig( dpy, pFBC[i] ); + if(pVi && (xattr.visual && pVi->visualid == xattr.visual->visualid) ) + { + // pick the one with the most samples per pixel + int nSampleBuf = 0; + int nSamples = 0; + glXGetFBConfigAttrib( dpy, pFBC[i], GLX_SAMPLE_BUFFERS, &nSampleBuf ); + glXGetFBConfigAttrib( dpy, pFBC[i], GLX_SAMPLES , &nSamples ); + + if ( nBestFBC < 0 || (nSampleBuf && ( nSamples > best_num_samp )) ) + { + nBestFBC = i; + best_num_samp = nSamples; + } + } + XFree( pVi ); + } + + return pFBC; + } +} + +void X11OpenGLContext::sync() +{ + OpenGLZone aZone; + glXWaitGL(); + XSync(m_aGLWin.dpy, false); +} + +void X11OpenGLContext::swapBuffers() +{ + OpenGLZone aZone; + + glXSwapBuffers(m_aGLWin.dpy, m_aGLWin.win); + + BuffersSwapped(); +} + +void X11OpenGLContext::resetCurrent() +{ + clearCurrent(); + + OpenGLZone aZone; + + if (m_aGLWin.dpy) + { + glXMakeCurrent(m_aGLWin.dpy, None, nullptr); + g_bAnyCurrent = false; + } +} + +bool X11OpenGLContext::isCurrent() +{ + OpenGLZone aZone; + return g_bAnyCurrent && m_aGLWin.ctx && glXGetCurrentContext() == m_aGLWin.ctx && + glXGetCurrentDrawable() == m_aGLWin.win; +} + +bool X11OpenGLContext::isAnyCurrent() +{ + return g_bAnyCurrent && glXGetCurrentContext() != None; +} + +SystemWindowData X11OpenGLContext::generateWinData(vcl::Window* pParent, bool /*bRequestLegacyContext*/) +{ + OpenGLZone aZone; + + SystemWindowData aWinData; + aWinData.pVisual = nullptr; + aWinData.bClipUsingNativeWidget = false; + + const SystemEnvData* sysData(pParent->GetSystemData()); + + Display *dpy = static_cast<Display*>(sysData->pDisplay); + Window win = sysData->GetWindowHandle(pParent->ImplGetFrame()); + + if( dpy == nullptr || !glXQueryExtension( dpy, nullptr, nullptr ) ) + return aWinData; + + int best_fbc = -1; + GLXFBConfig* pFBC = getFBConfig(dpy, win, best_fbc); + + if (!pFBC) + return aWinData; + + XVisualInfo* vi = nullptr; + if( best_fbc != -1 ) + vi = glXGetVisualFromFBConfig( dpy, pFBC[best_fbc] ); + + XFree(pFBC); + + if( vi ) + { + VCL_GL_INFO("using VisualID " << vi->visualid); + aWinData.pVisual = static_cast<void*>(vi->visual); + } + + return aWinData; +} + +bool X11OpenGLContext::ImplInit() +{ + if (!m_aGLWin.dpy) + return false; + + OpenGLZone aZone; + + GLXContext pSharedCtx( nullptr ); +#ifdef DBG_UTIL + TempErrorHandler aErrorHandler(m_aGLWin.dpy, unxErrorHandler); +#endif + + VCL_GL_INFO("OpenGLContext::ImplInit----start"); + + if (!g_vShareList.empty()) + pSharedCtx = g_vShareList.front(); + + //tdf#112166 for, e.g. VirtualBox GL, claiming OpenGL 2.1 + static bool hasCreateContextAttribsARB = glXGetProcAddress(reinterpret_cast<const GLubyte*>("glXCreateContextAttribsARB")) != nullptr; + if (hasCreateContextAttribsARB && !mbRequestLegacyContext) + { + int best_fbc = -1; + GLXFBConfig* pFBC = getFBConfig(m_aGLWin.dpy, m_aGLWin.win, best_fbc); + + if (pFBC && best_fbc != -1) + { + int const pContextAttribs[] = + { +#if 0 // defined(DBG_UTIL) + GLX_CONTEXT_MAJOR_VERSION_ARB, 3, + GLX_CONTEXT_MINOR_VERSION_ARB, 2, +#endif + None + + }; + m_aGLWin.ctx = glXCreateContextAttribsARB(m_aGLWin.dpy, pFBC[best_fbc], pSharedCtx, /* direct, not via X */ GL_TRUE, pContextAttribs); + SAL_INFO_IF(m_aGLWin.ctx, "vcl.opengl", "created a 3.2 core context"); + } + else + SAL_WARN("vcl.opengl", "unable to find correct FBC"); + } + + if (!m_aGLWin.ctx) + { + if (!m_aGLWin.vi) + return false; + + SAL_WARN("vcl.opengl", "attempting to create a non-double-buffered " + "visual matching the context"); + + m_aGLWin.ctx = glXCreateContext(m_aGLWin.dpy, + m_aGLWin.vi, + pSharedCtx, + GL_TRUE /* direct, not via X server */); + } + + if( m_aGLWin.ctx ) + { + g_vShareList.push_back( m_aGLWin.ctx ); + } + else + { + SAL_WARN("vcl.opengl", "unable to create GLX context"); + return false; + } + + if( !glXMakeCurrent( m_aGLWin.dpy, m_aGLWin.win, m_aGLWin.ctx ) ) + { + g_bAnyCurrent = false; + SAL_WARN("vcl.opengl", "unable to select current GLX context"); + return false; + } + + g_bAnyCurrent = true; + + int glxMinor, glxMajor; + double nGLXVersion = 0; + if( glXQueryVersion( m_aGLWin.dpy, &glxMajor, &glxMinor ) ) + nGLXVersion = glxMajor + 0.1*glxMinor; + SAL_INFO("vcl.opengl", "available GLX version: " << nGLXVersion); + + SAL_INFO("vcl.opengl", "available GL extensions: " << glGetString(GL_EXTENSIONS)); + + XWindowAttributes aWinAttr; + if( !XGetWindowAttributes( m_aGLWin.dpy, m_aGLWin.win, &aWinAttr ) ) + { + SAL_WARN("vcl.opengl", "Failed to get window attributes on " << m_aGLWin.win); + m_aGLWin.Width = 0; + m_aGLWin.Height = 0; + } + else + { + m_aGLWin.Width = aWinAttr.width; + m_aGLWin.Height = aWinAttr.height; + } + + if( m_aGLWin.HasGLXExtension("GLX_SGI_swap_control" ) ) + { + // enable vsync + typedef GLint (*glXSwapIntervalProc)(GLint); + glXSwapIntervalProc glXSwapInterval = reinterpret_cast<glXSwapIntervalProc>(glXGetProcAddress( reinterpret_cast<const GLubyte*>("glXSwapIntervalSGI") )); + if( glXSwapInterval ) + { + TempErrorHandler aLocalErrorHandler(m_aGLWin.dpy, oglErrorHandler); + + errorTriggered = false; + + glXSwapInterval( 1 ); + + if( errorTriggered ) + SAL_WARN("vcl.opengl", "error when trying to set swap interval, NVIDIA or Mesa bug?"); + else + VCL_GL_INFO("set swap interval to 1 (enable vsync)"); + } + } + + bool bRet = InitGL(); + InitGLDebugging(); + + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); + + registerAsCurrent(); + + return bRet; +} + +void X11OpenGLContext::makeCurrent() +{ + if (isCurrent()) + return; + + OpenGLZone aZone; + + clearCurrent(); + +#ifdef DBG_UTIL + TempErrorHandler aErrorHandler(m_aGLWin.dpy, unxErrorHandler); +#endif + + if (m_aGLWin.dpy) + { + if (!glXMakeCurrent( m_aGLWin.dpy, m_aGLWin.win, m_aGLWin.ctx )) + { + g_bAnyCurrent = false; + SAL_WARN("vcl.opengl", "OpenGLContext::makeCurrent failed " + "on drawable " << m_aGLWin.win); + return; + } + g_bAnyCurrent = true; + } + + registerAsCurrent(); +} + +void X11OpenGLContext::destroyCurrentContext() +{ + if(!m_aGLWin.ctx) + return; + + std::vector<GLXContext>::iterator itr = std::remove( g_vShareList.begin(), g_vShareList.end(), m_aGLWin.ctx ); + if (itr != g_vShareList.end()) + g_vShareList.erase(itr); + + glXMakeCurrent(m_aGLWin.dpy, None, nullptr); + g_bAnyCurrent = false; + if( glGetError() != GL_NO_ERROR ) + { + SAL_WARN("vcl.opengl", "glError: " << glGetError()); + } + glXDestroyContext(m_aGLWin.dpy, m_aGLWin.ctx); + m_aGLWin.ctx = nullptr; +} + +void X11OpenGLContext::initGLWindow(Visual* pVisual) +{ + OpenGLZone aZone; + + // Get visual info + { + XVisualInfo aTemplate; + aTemplate.visualid = XVisualIDFromVisual( pVisual ); + int nVisuals = 0; + XVisualInfo* pInfo = XGetVisualInfo( m_aGLWin.dpy, VisualIDMask, &aTemplate, &nVisuals ); + if( nVisuals != 1 ) + SAL_WARN( "vcl.opengl", "match count for visual id is not 1" ); + m_aGLWin.vi = pInfo; + } + + // Check multisample support + /* TODO: moggi: This is not necessarily correct in the DBG_UTIL path, as it picks + * an FBConfig instead ... */ + int nSamples = 0; + glXGetConfig(m_aGLWin.dpy, m_aGLWin.vi, GLX_SAMPLES, &nSamples); + if( nSamples > 0 ) + m_aGLWin.bMultiSampleSupported = true; + + m_aGLWin.GLXExtensions = glXQueryExtensionsString( m_aGLWin.dpy, m_aGLWin.screen ); + SAL_INFO("vcl.opengl", "available GLX extensions: " << m_aGLWin.GLXExtensions); +} + +void X11OpenGLContext::initWindow() +{ + const SystemEnvData* pChildSysData = nullptr; + SystemWindowData winData = generateWinData(mpWindow, false); + if( winData.pVisual ) + { + if( !m_pChildWindow ) + { + m_pChildWindow = VclPtr<SystemChildWindow>::Create(mpWindow, 0, &winData, false); + } + pChildSysData = m_pChildWindow->GetSystemData(); + } + + if (!m_pChildWindow || !pChildSysData) + return; + + InitChildWindow(m_pChildWindow.get()); + + m_aGLWin.dpy = static_cast<Display*>(pChildSysData->pDisplay); + m_aGLWin.win = pChildSysData->GetWindowHandle(m_pChildWindow->ImplGetFrame()); + m_aGLWin.screen = pChildSysData->nScreen; + + Visual* pVisual = static_cast<Visual*>(pChildSysData->pVisual); + initGLWindow(pVisual); +} + +GLX11Window::GLX11Window() + : dpy(nullptr) + , screen(0) + , win(0) + , vi(nullptr) + , ctx(nullptr) +{ +} + +bool GLX11Window::HasGLXExtension( const char* name ) const +{ + for (sal_Int32 i = 0; i != -1;) { + if (o3tl::getToken(GLXExtensions, 0, ' ', i) == name) { + return true; + } + } + return false; +} + +GLX11Window::~GLX11Window() +{ + XFree(vi); +} + +bool GLX11Window::Synchronize(bool bOnoff) const +{ + XSynchronize(dpy, bOnoff); + return true; +} + +OpenGLContext* X11SalInstance::CreateOpenGLContext() +{ + return new X11OpenGLContext; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |