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#include "qwaylandxcompositeglxwindow.h"
#include "qwaylandxcompositebuffer.h"

#include <QtCore/QDebug>

#include "wayland-xcomposite-client-protocol.h"
#include <QtGui/QRegion>

#include <X11/extensions/Xcomposite.h>


QWaylandXCompositeGLXWindow::QWaylandXCompositeGLXWindow(QWindow *window, QWaylandXCompositeGLXIntegration *glxIntegration)
    : QWaylandWindow(window)
    , m_glxIntegration(glxIntegration)
    , m_xWindow(0)
    , m_config(qglx_findConfig(glxIntegration->xDisplay(), glxIntegration->screen(), window->format(), GLX_WINDOW_BIT | GLX_PIXMAP_BIT))
    , m_buffer(0)
    , m_waitingForSync(false)
{
}

QWaylandWindow::WindowType QWaylandXCompositeGLXWindow::windowType() const
{
    //yeah. this type needs a new name
    return QWaylandWindow::Egl;
}

void QWaylandXCompositeGLXWindow::setGeometry(const QRect &rect)
{
    QWaylandWindow::setGeometry(rect);

    if (m_xWindow) {
        delete m_buffer;

        XDestroyWindow(m_glxIntegration->xDisplay(), m_xWindow);
        m_xWindow = 0;
    }
}

Window QWaylandXCompositeGLXWindow::xWindow() const
{
    if (!m_xWindow)
        const_cast<QWaylandXCompositeGLXWindow *>(this)->createSurface();

    return m_xWindow;
}

void QWaylandXCompositeGLXWindow::waitForSync()
{
    wl_display_sync_callback(m_glxIntegration->waylandDisplay()->wl_display(),
                             QWaylandXCompositeGLXWindow::sync_function,
                             this);
    m_waitingForSync= true;
    wl_display_sync(m_glxIntegration->waylandDisplay()->wl_display(), 0);
    m_glxIntegration->waylandDisplay()->flushRequests();
    while (m_waitingForSync)
        m_glxIntegration->waylandDisplay()->readEvents();
}


void QWaylandXCompositeGLXWindow::createSurface()
{
    QSize size(geometry().size());
    if (size.isEmpty()) {
        //QGLWidget wants a context for a window without geometry
        size = QSize(1,1);
    }

    if (!m_glxIntegration->xDisplay()) {
        qWarning("XCompositeGLXWindow: X display still null?!");
        return;
    }

    XVisualInfo *visualInfo = glXGetVisualFromFBConfig(m_glxIntegration->xDisplay(), m_config);
    Colormap cmap = XCreateColormap(m_glxIntegration->xDisplay(), m_glxIntegration->rootWindow(),
            visualInfo->visual, AllocNone);

    XSetWindowAttributes a;
    a.background_pixel = WhitePixel(m_glxIntegration->xDisplay(), m_glxIntegration->screen());
    a.border_pixel = BlackPixel(m_glxIntegration->xDisplay(), m_glxIntegration->screen());
    a.colormap = cmap;
    m_xWindow = XCreateWindow(m_glxIntegration->xDisplay(), m_glxIntegration->rootWindow(),0, 0, size.width(), size.height(),
                              0, visualInfo->depth, InputOutput, visualInfo->visual,
                              CWBackPixel|CWBorderPixel|CWColormap, &a);

    XCompositeRedirectWindow(m_glxIntegration->xDisplay(), m_xWindow, CompositeRedirectManual);
    XMapWindow(m_glxIntegration->xDisplay(), m_xWindow);

    XSync(m_glxIntegration->xDisplay(), False);
    m_buffer = new QWaylandXCompositeBuffer(m_glxIntegration->waylandXComposite(),
                                            (uint32_t)m_xWindow,
                                            size,
                                            m_glxIntegration->waylandDisplay()->argbVisual());
    attach(m_buffer);
    waitForSync();
}

void QWaylandXCompositeGLXWindow::sync_function(void *data)
{
    QWaylandXCompositeGLXWindow *that = static_cast<QWaylandXCompositeGLXWindow *>(data);
    that->m_waitingForSync = false;
}