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** this package.

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

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****************************************************************************/

#include <QtCore/qdebug.h>

#include <private/qt_x11_p.h>

#include <QtGui/qx11info_x11.h>

#include <private/qpixmapdata_p.h>

#include <private/qpixmap_x11_p.h>

#include <QtGui/qpaintdevice.h>

#include <QtGui/qpixmap.h>

#include <QtGui/qwidget.h>

#include "qegl_p.h"

QT_BEGIN_NAMESPACE

EGLSurface QEglContext::createSurface(QPaintDevice *device, const QEglProperties *properties)

{

    // Create the native drawable for the paint device.

    int devType = device->devType();

    EGLNativePixmapType pixmapDrawable = 0;

    EGLNativeWindowType windowDrawable = 0;

    bool ok;

    if (devType == QInternal::Pixmap) {

        pixmapDrawable = (EGLNativePixmapType)(static_cast<QPixmap *>(device))->handle();

        ok = (pixmapDrawable != 0);

    } else if (devType == QInternal::Widget) {

        windowDrawable = (EGLNativeWindowType)(static_cast<QWidget *>(device))->winId();

        ok = (windowDrawable != 0);

    } else {

        ok = false;

    }

    if (!ok) {

        qWarning("QEglContext::createSurface(): Cannot create the native EGL drawable");

        return EGL_NO_SURFACE;

    }

    // Create the EGL surface to draw into, based on the native drawable.

    const int *props;

    if (properties)

        props = properties->properties();

    else

        props = 0;

    EGLSurface surf;

    if (devType == QInternal::Widget)

        surf = eglCreateWindowSurface(dpy, cfg, windowDrawable, props);

    else

        surf = eglCreatePixmapSurface(dpy, cfg, pixmapDrawable, props);

    if (surf == EGL_NO_SURFACE) {

        qWarning() << "QEglContext::createSurface(): Unable to create EGL surface:"

                   << errorString(eglGetError());

    }

    return surf;

}

EGLDisplay QEglContext::getDisplay(QPaintDevice *device)

{

    Q_UNUSED(device);

    Display *xdpy = QX11Info::display();

    if (!xdpy) {

        qWarning("QEglContext::getDisplay(): X11 display is not open");

        return EGL_NO_DISPLAY;

    }

    return eglGetDisplay(EGLNativeDisplayType(xdpy));

}

static int countBits(unsigned long mask)

{

    int count = 0;

    while (mask != 0) {

        if (mask & 1)

            ++count;

        mask >>= 1;

    }

    return count;

}

// Set the pixel format parameters from the visual in "xinfo".

void QEglProperties::setVisualFormat(const QX11Info *xinfo)

{

    if (!xinfo)

        return;

    Visual *visual = (Visual*)xinfo->visual();

    if (!visual)

        return;

    if (visual->c_class != TrueColor && visual->c_class != DirectColor)

        return;

    setValue(EGL_RED_SIZE, countBits(visual->red_mask));

    setValue(EGL_GREEN_SIZE, countBits(visual->green_mask));

    setValue(EGL_BLUE_SIZE, countBits(visual->blue_mask));

    EGLint alphaBits = 0;

#if !defined(QT_NO_XRENDER)

    XRenderPictFormat *format;

    format = XRenderFindVisualFormat(xinfo->display(), visual);

    if (format && (format->type == PictTypeDirect) && format->direct.alphaMask) {

        alphaBits = countBits(format->direct.alphaMask);

        qDebug("QEglProperties::setVisualFormat() - visual's alphaMask is %d", alphaBits);

    }

#endif

    setValue(EGL_ALPHA_SIZE, alphaBits);

}

extern const QX11Info *qt_x11Info(const QPaintDevice *pd);

// Set pixel format and other properties based on a paint device.

void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)

{

    if (!dev)

        return;

    if (dev->devType() == QInternal::Image)

        setPixelFormat(static_cast<QImage *>(dev)->format());

    else

        setVisualFormat(qt_x11Info(dev));

}

QT_END_NAMESPACE