229 lines
8.1 KiB
C++
229 lines
8.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the plugins of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QDebug>
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#include <QLibrary>
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#include "qxcbwindow.h"
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#include "qxcbscreen.h"
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <GL/glx.h>
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#include <QtGui/QOpenGLContext>
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#include "qglxintegration.h"
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#include <QtPlatformSupport/private/qglxconvenience_p.h>
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#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4)
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#include <dlfcn.h>
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#endif
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QT_BEGIN_NAMESPACE
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typedef GLXContext (*glXCreateContextAttribsARBProc)(Display*, GLXFBConfig, GLXContext, Bool, const int*);
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#ifndef GLX_CONTEXT_CORE_PROFILE_BIT_ARB
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#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
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#endif
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#ifndef GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB
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#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
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#endif
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#ifndef GLX_CONTEXT_PROFILE_MASK_ARB
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#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
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#endif
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QGLXContext::QGLXContext(QXcbScreen *screen, const QSurfaceFormat &format, QPlatformOpenGLContext *share)
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: QPlatformOpenGLContext()
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, m_screen(screen)
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, m_context(0)
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, m_format(format)
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{
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m_shareContext = 0;
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if (share)
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m_shareContext = static_cast<const QGLXContext*>(share)->glxContext();
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GLXFBConfig config = qglx_findConfig(DISPLAY_FROM_XCB(screen),screen->screenNumber(),format);
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if (config) {
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m_context = glXCreateNewContext(DISPLAY_FROM_XCB(screen), config, GLX_RGBA_TYPE, m_shareContext, TRUE);
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if (!m_context && m_shareContext) {
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// re-try without a shared glx context
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m_shareContext = 0;
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m_context = glXCreateNewContext(DISPLAY_FROM_XCB(screen), config, GLX_RGBA_TYPE, 0, TRUE);
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}
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// Resolve entry point for glXCreateContextAttribsARB
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glXCreateContextAttribsARBProc glXCreateContextAttribsARB = 0;
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glXCreateContextAttribsARB = (glXCreateContextAttribsARBProc) glXGetProcAddress((const GLubyte*)"glXCreateContextAttribsARB");
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if (glXCreateContextAttribsARB != 0) {
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QVector<int> contextAttributes;
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contextAttributes << GLX_CONTEXT_MAJOR_VERSION_ARB << m_format.majorVersion()
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<< GLX_CONTEXT_MINOR_VERSION_ARB << m_format.minorVersion();
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if (m_format.majorVersion() >= 3 || (m_format.majorVersion() == 3 && m_format.minorVersion() > 1)) {
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if (m_format.profile() == QSurfaceFormat::CoreProfile) {
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contextAttributes << GLX_CONTEXT_FLAGS_ARB << GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB
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<< GLX_CONTEXT_PROFILE_MASK_ARB << GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
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} else {
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contextAttributes << GLX_CONTEXT_PROFILE_MASK_ARB << GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
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}
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}
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contextAttributes << None;
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GLXContext context = 0;
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context = glXCreateContextAttribsARB(DISPLAY_FROM_XCB(screen), config, m_shareContext, true, contextAttributes.data());
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if (!m_context && m_shareContext) {
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// re-try without a shared glx context
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m_shareContext = 0;
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context = glXCreateContextAttribsARB(DISPLAY_FROM_XCB(screen), config, 0, true, contextAttributes.data());
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}
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// Set this as our context and destroy the old context
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if (context) {
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glXMakeCurrent(DISPLAY_FROM_XCB(screen), 0, 0);
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glXDestroyContext(DISPLAY_FROM_XCB(screen), m_context);
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m_context = context;
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}
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}
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if (m_context) {
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m_format = qglx_surfaceFormatFromGLXFBConfig(DISPLAY_FROM_XCB(screen), config, m_context);
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m_format.setMajorVersion(format.majorVersion());
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m_format.setMinorVersion(format.minorVersion());
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m_format.setProfile(format.profile());
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}
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} else {
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XVisualInfo *visualInfo = qglx_findVisualInfo(DISPLAY_FROM_XCB(m_screen), screen->screenNumber(), &m_format);
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if (!visualInfo)
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qFatal("Could not initialize GLX");
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m_context = glXCreateContext(DISPLAY_FROM_XCB(screen), visualInfo, m_shareContext, true);
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if (!m_context && m_shareContext) {
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// re-try without a shared glx context
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m_shareContext = 0;
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m_context = glXCreateContext(DISPLAY_FROM_XCB(screen), visualInfo, 0, true);
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}
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XFree(visualInfo);
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}
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}
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QGLXContext::~QGLXContext()
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{
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glXDestroyContext(DISPLAY_FROM_XCB(m_screen), m_context);
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}
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bool QGLXContext::makeCurrent(QPlatformSurface *surface)
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{
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Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
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GLXDrawable glxDrawable = static_cast<QXcbWindow *>(surface)->xcb_window();
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return glXMakeCurrent(DISPLAY_FROM_XCB(m_screen), glxDrawable, m_context);
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}
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void QGLXContext::doneCurrent()
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{
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glXMakeCurrent(DISPLAY_FROM_XCB(m_screen), 0, 0);
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}
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void QGLXContext::swapBuffers(QPlatformSurface *surface)
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{
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GLXDrawable glxDrawable = static_cast<QXcbWindow *>(surface)->xcb_window();
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glXSwapBuffers(DISPLAY_FROM_XCB(m_screen), glxDrawable);
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}
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void (*QGLXContext::getProcAddress(const QByteArray &procName)) ()
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{
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typedef void *(*qt_glXGetProcAddressARB)(const GLubyte *);
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static qt_glXGetProcAddressARB glXGetProcAddressARB = 0;
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static bool resolved = false;
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if (resolved && !glXGetProcAddressARB)
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return 0;
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if (!glXGetProcAddressARB) {
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QList<QByteArray> glxExt = QByteArray(glXGetClientString(DISPLAY_FROM_XCB(m_screen), GLX_EXTENSIONS)).split(' ');
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if (glxExt.contains("GLX_ARB_get_proc_address")) {
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#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4)
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void *handle = dlopen(NULL, RTLD_LAZY);
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if (handle) {
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glXGetProcAddressARB = (qt_glXGetProcAddressARB) dlsym(handle, "glXGetProcAddressARB");
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dlclose(handle);
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}
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if (!glXGetProcAddressARB)
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#endif
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{
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extern const QString qt_gl_library_name();
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// QLibrary lib(qt_gl_library_name());
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QLibrary lib(QLatin1String("GL"));
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glXGetProcAddressARB = (qt_glXGetProcAddressARB) lib.resolve("glXGetProcAddressARB");
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}
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}
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resolved = true;
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}
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if (!glXGetProcAddressARB)
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return 0;
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return (void (*)())glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(procName.constData()));
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}
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QSurfaceFormat QGLXContext::format() const
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{
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return m_format;
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}
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bool QGLXContext::isSharing() const
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{
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return m_shareContext != 0;
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}
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bool QGLXContext::isValid() const
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{
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return m_context != 0;
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}
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QT_END_NAMESPACE
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