/****************************************************************************
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** This file is part of the plugins of the Qt Toolkit.
**
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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
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** 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
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****************************************************************************/

#include "qxlibintegration.h"
#include "qxlibwindowsurface.h"
#include <QtGui/private/qpixmap_raster_p.h>
#include <QtCore/qdebug.h>

#include "qxlibwindow.h"
#include "qgenericunixfontdatabase.h"
#include "qxlibscreen.h"
#include "qxlibclipboard.h"
#include "qxlibdisplay.h"
#include "qxlibnativeinterface.h"

#if !defined(QT_NO_OPENGL)
#if !defined(QT_OPENGL_ES_2)
#include <GL/glx.h>
#else
#include <EGL/egl.h>
#endif //!defined(QT_OPENGL_ES_2)
#include <private/qwindowsurface_gl_p.h>
#include <private/qpixmapdata_gl_p.h>
#endif //QT_NO_OPENGL

QT_BEGIN_NAMESPACE

QXlibIntegration::QXlibIntegration(bool useOpenGL)
    : mUseOpenGL(useOpenGL)
    , mFontDb(new QGenericUnixFontDatabase())
    , mClipboard(0)
    , mNativeInterface(new QXlibNativeInterface)
{
    mPrimaryScreen = new QXlibScreen();
    mScreens.append(mPrimaryScreen);
}

bool QXlibIntegration::hasCapability(QPlatformIntegration::Capability cap) const
{
    switch (cap) {
    case ThreadedPixmaps: return true;
    case OpenGL: return hasOpenGL();
    default: return QPlatformIntegration::hasCapability(cap);
    }
}

QPixmapData *QXlibIntegration::createPixmapData(QPixmapData::PixelType type) const
{
#ifndef QT_NO_OPENGL
    if (mUseOpenGL)
        return new QGLPixmapData(type);
#endif
    return new QRasterPixmapData(type);
}

QWindowSurface *QXlibIntegration::createWindowSurface(QWidget *widget, WId) const
{
#ifndef QT_NO_OPENGL
    if (mUseOpenGL)
        return new QGLWindowSurface(widget);
#endif
    return new QXlibWindowSurface(widget);
}


QPlatformWindow *QXlibIntegration::createPlatformWindow(QWidget *widget, WId /*winId*/) const
{
    return new QXlibWindow(widget);
}



QPixmap QXlibIntegration::grabWindow(WId window, int x, int y, int width, int height) const
{
    QImage image;
    QWidget *widget = QWidget::find(window);
    if (widget) {
        QXlibScreen *screen = QXlibScreen::testLiteScreenForWidget(widget);
        image = screen->grabWindow(window,x,y,width,height);
    } else {
        for (int i = 0; i < mScreens.size(); i++) {
            QXlibScreen *screen = static_cast<QXlibScreen *>(mScreens[i]);
            if (screen->rootWindow() == window) {
                image = screen->grabWindow(window,x,y,width,height);
            }
        }
    }
    return QPixmap::fromImage(image);
}

QPlatformFontDatabase *QXlibIntegration::fontDatabase() const
{
    return mFontDb;
}

QPlatformClipboard * QXlibIntegration::clipboard() const
{
    //Use lazy init since clipboard needs QTestliteScreen
    if (!mClipboard) {
        QXlibIntegration *that = const_cast<QXlibIntegration *>(this);
        that->mClipboard = new QXlibClipboard(mPrimaryScreen);
    }
    return mClipboard;
}

QPlatformNativeInterface * QXlibIntegration::nativeInterface() const
{
    return mNativeInterface;
}

bool QXlibIntegration::hasOpenGL() const
{
#if !defined(QT_NO_OPENGL)
#if !defined(QT_OPENGL_ES_2)
    QXlibScreen *screen = static_cast<QXlibScreen *>(mScreens.at(0));
    return glXQueryExtension(screen->display()->nativeDisplay(), 0, 0) != 0;
#else
    static bool eglHasbeenInitialized = false;
    static bool wasEglInitialized = false;
    if (!eglHasbeenInitialized) {
        eglHasbeenInitialized = true;
        QXlibScreen *screen = static_cast<QXlibScreen *>(mScreens.at(0));
        EGLint major, minor;
        eglBindAPI(EGL_OPENGL_ES_API);
        EGLDisplay disp = eglGetDisplay(screen->display()->nativeDisplay());
        wasEglInitialized = eglInitialize(disp,&major,&minor);
        screen->setEglDisplay(disp);
    }
    return wasEglInitialized;
#endif
#endif
    return false;
}

QT_END_NAMESPACE