diff options
Diffstat (limited to 'src/plugins/platforms/offscreen/qoffscreenintegration_x11.cpp')
| -rw-r--r-- | src/plugins/platforms/offscreen/qoffscreenintegration_x11.cpp | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/src/plugins/platforms/offscreen/qoffscreenintegration_x11.cpp b/src/plugins/platforms/offscreen/qoffscreenintegration_x11.cpp new file mode 100644 index 0000000000..4b27afd80f --- /dev/null +++ b/src/plugins/platforms/offscreen/qoffscreenintegration_x11.cpp @@ -0,0 +1,252 @@ +/**************************************************************************** +** +** Copyright (C) 2012 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 "qoffscreenintegration_x11.h" + +#include <QByteArray> +#include <QOpenGLContext> + +#include <X11/Xlib.h> +#include <GL/glx.h> + +#include <QtPlatformSupport/private/qglxconvenience_p.h> + +#include <qpa/qplatformsurface.h> +#include <qsurface.h> + +QT_BEGIN_NAMESPACE + +QOffscreenIntegration *QOffscreenIntegration::createOffscreenIntegration() +{ + return new QOffscreenX11Integration; +} + +bool QOffscreenX11Integration::hasCapability(QPlatformIntegration::Capability cap) const +{ + switch (cap) { + case OpenGL: return true; + case ThreadedOpenGL: return true; + default: return QOffscreenIntegration::hasCapability(cap); + } +} + +QPlatformOpenGLContext *QOffscreenX11Integration::createPlatformOpenGLContext(QOpenGLContext *context) const +{ + if (!m_connection) + m_connection.reset(new QOffscreenX11Connection); + + return new QOffscreenX11GLXContext(m_connection->x11Info(), context); +} + +QOffscreenX11Connection::QOffscreenX11Connection() +{ + XInitThreads(); + + QByteArray displayName = qgetenv("DISPLAY"); + Display *display = XOpenDisplay(displayName.constData()); + m_display = display; + m_screenNumber = DefaultScreen(display); +} + +QOffscreenX11Connection::~QOffscreenX11Connection() +{ + XCloseDisplay((Display *)m_display); +} + +class QOffscreenX11Info +{ +public: + QOffscreenX11Info(QOffscreenX11Connection *connection) + : m_connection(connection) + { + } + + Display *display() const { + return (Display *)m_connection->display(); + } + + Window root() const { + return DefaultRootWindow(display()); + } + + int screenNumber() const { + return m_connection->screenNumber(); + } + +private: + QOffscreenX11Connection *m_connection; +}; + +QOffscreenX11Info *QOffscreenX11Connection::x11Info() +{ + if (!m_x11Info) + m_x11Info.reset(new QOffscreenX11Info(this)); + return m_x11Info.data(); +} + +class QOffscreenX11GLXContextData +{ +public: + QOffscreenX11Info *x11; + QSurfaceFormat format; + GLXContext context; + GLXContext shareContext; + Window window; +}; + +static Window createDummyWindow(QOffscreenX11Info *x11, XVisualInfo *visualInfo) +{ + Colormap cmap = XCreateColormap(x11->display(), x11->root(), visualInfo->visual, AllocNone); + XSetWindowAttributes a; + a.background_pixel = WhitePixel(x11->display(), x11->screenNumber()); + a.border_pixel = BlackPixel(x11->display(), x11->screenNumber()); + a.colormap = cmap; + + Window window = XCreateWindow(x11->display(), x11->root(), + 0, 0, 100, 100, + 0, visualInfo->depth, InputOutput, visualInfo->visual, + CWBackPixel|CWBorderPixel|CWColormap, &a); + XFreeColormap(x11->display(), cmap); + return window; +} + +static Window createDummyWindow(QOffscreenX11Info *x11, GLXFBConfig config) +{ + XVisualInfo *visualInfo = glXGetVisualFromFBConfig(x11->display(), config); + if (!visualInfo) + qFatal("Could not initialize GLX"); + Window window = createDummyWindow(x11, visualInfo); + XFree(visualInfo); + return window; +} + +QOffscreenX11GLXContext::QOffscreenX11GLXContext(QOffscreenX11Info *x11, QOpenGLContext *context) + : d(new QOffscreenX11GLXContextData) +{ + d->x11 = x11; + d->format = context->format(); + + d->shareContext = 0; + if (context->shareHandle()) + d->shareContext = static_cast<QOffscreenX11GLXContext *>(context->shareHandle())->d->context; + + GLXFBConfig config = qglx_findConfig(x11->display(), x11->screenNumber(), d->format); + if (config) { + d->context = glXCreateNewContext(x11->display(), config, GLX_RGBA_TYPE, d->shareContext, true); + if (!d->context && d->shareContext) { + d->shareContext = 0; + // re-try without a shared glx context + d->context = glXCreateNewContext(x11->display(), config, GLX_RGBA_TYPE, 0, true); + } + + // Get the basic surface format details + if (d->context) + d->format = qglx_surfaceFormatFromGLXFBConfig(x11->display(), config, d->context); + + // Create a temporary window so that we can make the new context current + d->window = createDummyWindow(x11, config); + } else { + XVisualInfo *visualInfo = qglx_findVisualInfo(x11->display(), 0, &d->format); + if (!visualInfo) + qFatal("Could not initialize GLX"); + d->context = glXCreateContext(x11->display(), visualInfo, d->shareContext, true); + if (!d->context && d->shareContext) { + // re-try without a shared glx context + d->shareContext = 0; + d->context = glXCreateContext(x11->display(), visualInfo, 0, true); + } + + d->window = createDummyWindow(x11, visualInfo); + XFree(visualInfo); + } +} + +QOffscreenX11GLXContext::~QOffscreenX11GLXContext() +{ + glXDestroyContext(d->x11->display(), d->context); + XDestroyWindow(d->x11->display(), d->window); +} + +bool QOffscreenX11GLXContext::makeCurrent(QPlatformSurface *surface) +{ + QSize size = surface->surface()->size(); + + XResizeWindow(d->x11->display(), d->window, size.width(), size.height()); + XSync(d->x11->display(), true); + + if (glXMakeCurrent(d->x11->display(), d->window, d->context)) { + glViewport(0, 0, size.width(), size.height()); + return true; + } + + return false; +} + +void QOffscreenX11GLXContext::doneCurrent() +{ + glXMakeCurrent(d->x11->display(), 0, 0); +} + +void QOffscreenX11GLXContext::swapBuffers(QPlatformSurface *) +{ +} + +void (*QOffscreenX11GLXContext::getProcAddress(const QByteArray &procName)) () +{ + return (void (*)())glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(procName.constData())); +} + +QSurfaceFormat QOffscreenX11GLXContext::format() const +{ + return d->format; +} + +bool QOffscreenX11GLXContext::isSharing() const +{ + return d->shareContext; +} + +bool QOffscreenX11GLXContext::isValid() const +{ + return d->context && d->window; +} + +QT_END_NAMESPACE |