path: root/src/opengl/qgl_x11egl.cpp

/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qgl.h"
#include <private/qt_x11_p.h>
#include <private/qgl_p.h>
#include <private/qpaintengine_opengl_p.h>
#include "qgl_egl_p.h"
#include "qcolormap.h"


QT_BEGIN_NAMESPACE


bool QGLFormat::hasOpenGL()
{
    return true;
}

bool QGLFormat::hasOpenGLOverlays()
{
    return false;
}

void qt_egl_add_platform_config(QEglProperties& props, QPaintDevice *device)
{
    if (device->devType() == QInternal::Image)
        props.setPixelFormat(static_cast<QImage *>(device)->format());
}

bool QGLContext::chooseContext(const QGLContext* shareContext)
{
    Q_D(QGLContext);

    if (!device())
        return false;

    int devType = device()->devType();

    // Get the display and initialize it.
    d->eglContext = new QEglContext();
    d->eglContext->setApi(QEglContext::OpenGL);
    if (!d->eglContext->openDisplay(device())) {
        delete d->eglContext;
        d->eglContext = 0;
        return false;
    }

    // Construct the configuration we need for this surface.
    QEglProperties configProps;
    qt_egl_set_format(configProps, devType, d->glFormat);
    qt_egl_add_platform_config(configProps, device());
    configProps.setRenderableType(QEglContext::OpenGL);

    // Search for a matching configuration, reducing the complexity
    // each time until we get something that matches.
    if (!d->eglContext->chooseConfig(configProps, QEglContext::BestPixelFormat)) {
        delete d->eglContext;
        d->eglContext = 0;
        return false;
    }

    // Inform the higher layers about the actual format properties.
    qt_egl_update_format(*(d->eglContext), d->glFormat);

    // Create a new context for the configuration.
    if (!d->eglContext->createContext
            (shareContext ? shareContext->d_func()->eglContext : 0)) {
        delete d->eglContext;
        d->eglContext = 0;
        return false;
    }

#if defined(EGL_VERSION_1_1)
    if (d->glFormat.swapInterval() != -1 && devType == QInternal::Widget)
        eglSwapInterval(d->eglContext->display(), d->glFormat.swapInterval());
#endif

    // Create the EGL surface to draw into.
    if (!d->eglContext->createSurface(device())) {
        delete d->eglContext;
        d->eglContext = 0;
        return false;
    }

    return true;
}


void QGLContext::reset()
{
    Q_D(QGLContext);
    if (!d->valid)
        return;
    d->cleanup();
    doneCurrent();
    if (d->eglContext) {
        delete d->eglContext;
        d->eglContext = 0;
    }
    d->crWin = false;
    d->sharing = false;
    d->valid = false;
    d->transpColor = QColor();
    d->initDone = false;
    qgl_share_reg()->removeShare(this);
}

void QGLContext::makeCurrent()
{
    Q_D(QGLContext);
    if(!d->valid || !d->eglContext) {
        qWarning("QGLContext::makeCurrent(): Cannot make invalid context current");
        return;
    }

    if (d->eglContext->makeCurrent()) {
        if (!qgl_context_storage.hasLocalData() && QThread::currentThread())
            qgl_context_storage.setLocalData(new QGLThreadContext);
        if (qgl_context_storage.hasLocalData())
            qgl_context_storage.localData()->context = this;
        currentCtx = this;
    }
}

void QGLContext::doneCurrent()
{
    Q_D(QGLContext);
    if (d->eglContext)
        d->eglContext->doneCurrent();

    if (qgl_context_storage.hasLocalData())
        qgl_context_storage.localData()->context = 0;
    currentCtx = 0;
}


void QGLContext::swapBuffers() const
{
    Q_D(const QGLContext);
    if(!d->valid || !d->eglContext)
        return;

    d->eglContext->swapBuffers();
}

QColor QGLContext::overlayTransparentColor() const
{
    return QColor(0, 0, 0);                // Invalid color
}

uint QGLContext::colorIndex(const QColor &c) const
{
    //### color index doesn't work on egl
    Q_UNUSED(c);
    return 0;
}

void QGLContext::generateFontDisplayLists(const QFont & fnt, int listBase)
{
    Q_UNUSED(fnt);
    Q_UNUSED(listBase);
}

void *QGLContext::getProcAddress(const QString &proc) const
{
    return (void*)eglGetProcAddress(reinterpret_cast<const char *>(proc.toLatin1().data()));
}

void QGLWidget::setMouseTracking(bool enable)
{
    QWidget::setMouseTracking(enable);
}


void QGLWidget::resizeEvent(QResizeEvent *)
{
    Q_D(QGLWidget);
    if (!isValid())
        return;
    makeCurrent();
    if (!d->glcx->initialized())
        glInit();
    resizeGL(width(), height());
    //handle overlay
}

const QGLContext* QGLWidget::overlayContext() const
{
    return 0;
}

void QGLWidget::makeOverlayCurrent()
{
    //handle overlay
}

void QGLWidget::updateOverlayGL()
{
    //handle overlay
}

void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext, bool deleteOldContext)
{
    Q_D(QGLWidget);
    if (context == 0) {
        qWarning("QGLWidget::setContext: Cannot set null context");
        return;
    }
    if (!context->deviceIsPixmap() && context->device() != this) {
        qWarning("QGLWidget::setContext: Context must refer to this widget");
        return;
    }

    if (d->glcx)
        d->glcx->doneCurrent();
    QGLContext* oldcx = d->glcx;
    d->glcx = context;

    if (parentWidget()) {
        // force creation of delay-created widgets
        parentWidget()->winId();
        if (parentWidget()->x11Info().screen() != x11Info().screen())
            d_func()->xinfo = parentWidget()->d_func()->xinfo;
    }

    bool visible = isVisible();
    if (visible)
        hide();

    XVisualInfo vi;

    int err = XMatchVisualInfo(x11Info().display(), x11Info().screen(), x11Info().depth(), TrueColor, &vi);
    if (err == 0) {
        qWarning("Error: Couldn't get a matching X visual for format");
        return;
    }

    XSetWindowAttributes a;

    Window p = RootWindow(X11->display, vi.screen);
    if (parentWidget())
        p = parentWidget()->winId();

    QColormap colmap = QColormap::instance(vi.screen);
    a.background_pixel = colmap.pixel(palette().color(backgroundRole()));
    a.border_pixel = colmap.pixel(Qt::black);

    Window w = XCreateWindow(X11->display, p, x(), y(), width(), height(),
                              0, vi.depth, InputOutput, vi.visual,
                              CWBackPixel|CWBorderPixel, &a);

    if (deleteOldContext)
        delete oldcx;
    oldcx = 0;

    create(w); // Create with the ID of the window we've just created

    d->eglSurfaceWindowId = w; // Remember the window id we created the surface for

    if (visible)
        show();

    bool createFailed = false;
    if (!d->glcx->isValid()) {
        if (!d->glcx->create(shareContext ? shareContext : oldcx))
            createFailed = true;
    }
    if (createFailed) {
        if (deleteOldContext)
            delete oldcx;
        return;
    }

    if (d->glcx->windowCreated() || d->glcx->deviceIsPixmap()) {
        if (deleteOldContext)
            delete oldcx;
        return;
    }

    d->glcx->setWindowCreated(true);
}

void QGLWidgetPrivate::init(QGLContext *context, const QGLWidget* shareWidget)
{
    Q_Q(QGLWidget);

    initContext(context, shareWidget);

    if(q->isValid() && glcx->format().hasOverlay()) {
        //no overlay
        qWarning("QtOpenGL ES doesn't currently support overlays");
    }
}

bool QGLWidgetPrivate::renderCxPm(QPixmap*)
{
    return false;
}

void QGLWidgetPrivate::cleanupColormaps()
{
}

const QGLColormap & QGLWidget::colormap() const
{
    return d_func()->cmap;
}

void QGLWidget::setColormap(const QGLColormap &)
{
}

void QGLExtensions::init()
{
    static bool init_done = false;

    if (init_done)
        return;
    init_done = true;
    init_extensions();
}

// Re-creates the EGL surface if the window ID has changed or if force is true
void QGLWidgetPrivate::recreateEglSurface(bool force)
{
    Q_Q(QGLWidget);

    Window currentId = q->winId();

    if ( force || (currentId != eglSurfaceWindowId) ) {
        // The window id has changed so we need to re-create the EGL surface
        if (!glcx->d_func()->eglContext->recreateSurface(q))
            qWarning("Error creating EGL window surface: 0x%x", eglGetError());

        eglSurfaceWindowId = currentId;
    }
}

QT_END_NAMESPACE