diff options
Diffstat (limited to 'src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp')
| -rw-r--r-- | src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp new file mode 100644 index 0000000000..c8ea2053e3 --- /dev/null +++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp @@ -0,0 +1,223 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qxcbglxintegration.h" + +#if defined(XCB_HAS_XCB_GLX) +#include <xcb/glx.h> +#endif + +#include "qxcbnativeinterface.h" +#include "qxcbglxwindow.h" +#include "qxcbscreen.h" +#include "qglxintegration.h" + +#include <QtGui/QOpenGLContext> + +#include "qxcbglxnativeinterfacehandler.h" + +#include <X11/Xlibint.h> + +QT_BEGIN_NAMESPACE + +#if defined(XCB_HAS_XCB_GLX) && XCB_GLX_MAJOR_VERSION == 1 && XCB_GLX_MINOR_VERSION < 4 + +#define XCB_GLX_BUFFER_SWAP_COMPLETE 1 + +typedef struct xcb_glx_buffer_swap_complete_event_t { + uint8_t response_type; + uint8_t pad0; + uint16_t sequence; + uint16_t event_type; + uint8_t pad1[2]; + xcb_glx_drawable_t drawable; + uint32_t ust_hi; + uint32_t ust_lo; + uint32_t msc_hi; + uint32_t msc_lo; + uint32_t sbc; +} xcb_glx_buffer_swap_complete_event_t; +#endif + +#if defined(XCB_USE_XLIB) && defined(XCB_USE_GLX) +typedef struct { + int type; + unsigned long serial; /* # of last request processed by server */ + Bool send_event; /* true if this came from a SendEvent request */ + Display *display; /* Display the event was read from */ + Drawable drawable; /* drawable on which event was requested in event mask */ + int event_type; + int64_t ust; + int64_t msc; + int64_t sbc; +} QGLXBufferSwapComplete; +#endif + +QXcbGlxIntegration::QXcbGlxIntegration() + : m_connection(Q_NULLPTR) + , m_glx_first_event(0) +{ + qCDebug(QT_XCB_GLINTEGRATION) << "Xcb GLX gl-integration created"; +} + +QXcbGlxIntegration::~QXcbGlxIntegration() +{ +} + +bool QXcbGlxIntegration::initialize(QXcbConnection *connection) +{ + m_connection = connection; +#ifdef XCB_HAS_XCB_GLX + + const xcb_query_extension_reply_t *reply = xcb_get_extension_data(m_connection->xcb_connection(), &xcb_glx_id); + if (!reply || !reply->present) + return false; + + m_glx_first_event = reply->first_event; + + xcb_generic_error_t *error = 0; + xcb_glx_query_version_cookie_t xglx_query_cookie = xcb_glx_query_version(m_connection->xcb_connection(), + XCB_GLX_MAJOR_VERSION, + XCB_GLX_MINOR_VERSION); + xcb_glx_query_version_reply_t *xglx_query = xcb_glx_query_version_reply(m_connection->xcb_connection(), + xglx_query_cookie, &error); + if (!xglx_query || error) { + qCWarning(QT_XCB_GLINTEGRATION) << "QXcbConnection: Failed to initialize GLX"; + free(error); + return false; + } + free(xglx_query); +#endif + + m_native_interface_handler.reset(new QXcbGlxNativeInterfaceHandler(connection->nativeInterface())); + + qCDebug(QT_XCB_GLINTEGRATION) << "Xcb GLX gl-integration successfully initialized"; + return true; +} + +bool QXcbGlxIntegration::handleXcbEvent(xcb_generic_event_t *event, uint responseType) +{ + bool handled = false; + // Check if a custom XEvent constructor was registered in xlib for this event type, and call it discarding the constructed XEvent if any. + // XESetWireToEvent might be used by libraries to intercept messages from the X server e.g. the OpenGL lib waiting for DRI2 events. + Display *xdisplay = static_cast<Display *>(m_connection->xlib_display()); + XLockDisplay(xdisplay); + bool locked = true; + Bool (*proc)(Display*, XEvent*, xEvent*) = XESetWireToEvent(xdisplay, responseType, 0); + if (proc) { + XESetWireToEvent(xdisplay, responseType, proc); + XEvent dummy; + event->sequence = LastKnownRequestProcessed(xdisplay); + if (proc(xdisplay, &dummy, (xEvent*)event)) { +#ifdef XCB_HAS_XCB_GLX + // DRI2 clients don't receive GLXBufferSwapComplete events on the wire. + // Instead the GLX event is synthesized from the DRI2BufferSwapComplete event + // by DRI2WireToEvent(). For an application to be able to see the event + // we have to convert it to an xcb_glx_buffer_swap_complete_event_t and + // pass it to the native event filter. + const uint swap_complete = m_glx_first_event + XCB_GLX_BUFFER_SWAP_COMPLETE; + QAbstractEventDispatcher* dispatcher = QAbstractEventDispatcher::instance(); + if (dispatcher && uint(dummy.type) == swap_complete && responseType != swap_complete) { + QGLXBufferSwapComplete *xev = reinterpret_cast<QGLXBufferSwapComplete *>(&dummy); + xcb_glx_buffer_swap_complete_event_t ev; + memset(&ev, 0, sizeof(xcb_glx_buffer_swap_complete_event_t)); + ev.response_type = xev->type; + ev.sequence = xev->serial; + ev.event_type = xev->event_type; + ev.drawable = xev->drawable; + ev.ust_hi = xev->ust >> 32; + ev.ust_lo = xev->ust & 0xffffffff; + ev.msc_hi = xev->msc >> 32; + ev.msc_lo = xev->msc & 0xffffffff; + ev.sbc = xev->sbc & 0xffffffff; + // Unlock the display before calling the native event filter + XUnlockDisplay(xdisplay); + locked = false; + QByteArray genericEventFilterType = m_connection->nativeInterface()->genericEventFilterType(); + long result = 0; + handled = dispatcher->filterNativeEvent(genericEventFilterType, &ev, &result); + } +#endif + } + } + if (locked) + XUnlockDisplay(xdisplay); + return handled; +} + +QXcbWindow *QXcbGlxIntegration::createWindow(QWindow *window) const +{ + return new QXcbGlxWindow(window); +} + +QPlatformOpenGLContext *QXcbGlxIntegration::createPlatformOpenGLContext(QOpenGLContext *context) const +{ + QXcbScreen *screen = static_cast<QXcbScreen *>(context->screen()->handle()); + QGLXContext *platformContext = new QGLXContext(screen, context->format(), + context->shareHandle(), context->nativeHandle()); + context->setNativeHandle(platformContext->nativeHandle()); + return platformContext; +} + +QPlatformOffscreenSurface *QXcbGlxIntegration::createPlatformOffscreenSurface(QOffscreenSurface *surface) const +{ + static bool vendorChecked = false; + static bool glxPbufferUsable = true; + if (!vendorChecked) { + vendorChecked = true; + const char *glxvendor = glXGetClientString(glXGetCurrentDisplay(), GLX_VENDOR); + if (glxvendor && !strcmp(glxvendor, "ATI")) + glxPbufferUsable = false; + } + if (glxPbufferUsable) + return new QGLXPbuffer(surface); + else + return 0; // trigger fallback to hidden QWindow + +} + +bool QXcbGlxIntegration::supportsThreadedOpenGL() const +{ + return QGLXContext::supportsThreading(); +} + + +QT_END_NAMESPACE |