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#include <QtDebug>

#include "qwaylandreadbackglxwindow.h"
#include "qwaylandshmbackingstore.h"

QWaylandReadbackGlxWindow::QWaylandReadbackGlxWindow(QWindow *window, QWaylandReadbackGlxIntegration *glxIntegration)
    : QWaylandShmWindow(window)
    , m_glxIntegration(glxIntegration)
    , m_buffer(0)
    , m_pixmap(0)
    , m_config(0)
    , m_glxPixmap(0)
    , m_window(window)
{
}

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

void QWaylandReadbackGlxWindow::setGeometry(const QRect &rect)
{
    QWaylandShmWindow::setGeometry(rect);

    if (m_pixmap) {
        delete mBuffer;
        //XFreePixmap deletes the glxPixmap as well
        XFreePixmap(m_glxIntegration->xDisplay(), m_pixmap);
        m_pixmap = 0;
    }
}

GLXPixmap QWaylandReadbackGlxWindow::glxPixmap() const
{
    if (!m_pixmap)
        const_cast<QWaylandReadbackGlxWindow *>(this)->createSurface();

    return m_glxPixmap;
}

uchar *QWaylandReadbackGlxWindow::buffer()
{
    return m_buffer->image()->bits();
}

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

    waitForFrameSync();

    m_buffer = new QWaylandShmBuffer(m_glxIntegration->waylandDisplay(), size, QImage::Format_ARGB32);
    attach(m_buffer);

    int depth = XDefaultDepth(m_glxIntegration->xDisplay(), m_glxIntegration->screen());
    m_pixmap = XCreatePixmap(m_glxIntegration->xDisplay(), m_glxIntegration->rootWindow(), size.width(), size.height(), depth);
    XSync(m_glxIntegration->xDisplay(), False);

    if (!m_config)
        m_config = qglx_findConfig(m_glxIntegration->xDisplay(), m_glxIntegration->screen(), m_window->format());

    m_glxPixmap = glXCreatePixmap(m_glxIntegration->xDisplay(), m_config, m_pixmap,0);

    if (!m_glxPixmap)
        qDebug() << "Could not make glx surface out of pixmap :(";
}