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

**

** All rights reserved.

** 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 Technology Preview License Agreement accompanying

** this package.

**

** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include <private/qgl_p.h>

#include <private/qegl_p.h>

#include <private/qeglproperties_p.h>

#include <private/qpaintengineex_opengl2_p.h>

#include "qpixmapdata_x11gl_p.h"

QT_BEGIN_NAMESPACE

extern EGLConfig qt_chooseEGLConfigForPixmap(bool hasAlpha, bool readOnly); // in qgl_x11egl.cpp

extern bool qt_createEGLSurfaceForPixmap(QPixmapData* pmd, bool readOnly); // in qgl_x11egl.cpp

// On 16bpp systems, RGB & ARGB pixmaps are different bit-depths and therefore need

// different contexts:

static EGLContext qPixmapARGBSharedEglContext = EGL_NO_CONTEXT;

static EGLContext qPixmapRGBSharedEglContext = EGL_NO_CONTEXT;

bool QX11GLPixmapData::hasX11GLPixmaps()

{

    static bool checkedForX11Pixmaps = false;

    static bool haveX11Pixmaps = false;

    if (checkedForX11Pixmaps)

        return haveX11Pixmaps;

    checkedForX11Pixmaps = true;

    QX11PixmapData *argbPixmapData = 0;

    QX11PixmapData *rgbPixmapData = 0;

    do {

        if (qgetenv("QT_USE_X11GL_PIXMAPS").isEmpty())

            break;

        // Check we actually have EGL configs which support pixmaps

        EGLConfig argbConfig = qt_chooseEGLConfigForPixmap(true, false);

        EGLConfig rgbConfig = qt_chooseEGLConfigForPixmap(false, false);

        if (argbConfig == 0 || rgbConfig == 0)

            break;

        // Create the shared contexts:

        eglBindAPI(EGL_OPENGL_ES_API);

        EGLint contextAttribs[] = {

#if defined(QT_OPENGL_ES_2)

            EGL_CONTEXT_CLIENT_VERSION, 2,

#endif

            EGL_NONE

        };

                                                       argbConfig, 0, contextAttribs);

        if (argbConfig == rgbConfig) {

            // If the configs are the same, we can re-use the same context.

            qPixmapRGBSharedEglContext = qPixmapARGBSharedEglContext;

        } else {

                                                           rgbConfig, 0, contextAttribs);

        }

        argbPixmapData = new QX11PixmapData(QPixmapData::PixmapType);

        argbPixmapData->resize(100, 100);

        argbPixmapData->fill(Qt::transparent); // Force ARGB

        if (!qt_createEGLSurfaceForPixmap(argbPixmapData, false))

            break;

                                        (EGLSurface)argbPixmapData->gl_surface,

                                        (EGLSurface)argbPixmapData->gl_surface,

                                        qPixmapARGBSharedEglContext);

        if (!haveX11Pixmaps) {

            EGLint err = eglGetError();

            qWarning() << "Unable to make pixmap config current:" << err << QEglContext::errorString(err);

            break;

        }

        // If the ARGB & RGB configs are the same, we don't need to check RGB too

        if (haveX11Pixmaps && (argbConfig != rgbConfig)) {

            rgbPixmapData = new QX11PixmapData(QPixmapData::PixmapType);

            rgbPixmapData->resize(100, 100);

            rgbPixmapData->fill(Qt::red);

            // Try to actually create an EGL pixmap surface

            if (!qt_createEGLSurfaceForPixmap(rgbPixmapData, false))

                break;

                                            (EGLSurface)rgbPixmapData->gl_surface,

                                            (EGLSurface)rgbPixmapData->gl_surface,

                                            qPixmapRGBSharedEglContext);

            if (!haveX11Pixmaps) {

                EGLint err = eglGetError();

                qWarning() << "Unable to make pixmap config current:" << err << QEglContext::errorString(err);

                break;

            }

        }

    } while (0);

    if (qPixmapARGBSharedEglContext || qPixmapRGBSharedEglContext) {

                       EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);

    }

    if (argbPixmapData) {

        if (argbPixmapData->gl_surface)

            QGLContextPrivate::destroyGlSurfaceForPixmap(argbPixmapData);

        delete argbPixmapData;

        argbPixmapData = 0;

    }

    if (rgbPixmapData) {

        if (rgbPixmapData->gl_surface)

            QGLContextPrivate::destroyGlSurfaceForPixmap(rgbPixmapData);

        delete rgbPixmapData;

        rgbPixmapData = 0;

    }

    if (!haveX11Pixmaps) {

        // Clean up the context(s) if we can't use X11GL pixmaps

        if (qPixmapARGBSharedEglContext != EGL_NO_CONTEXT)

        if (qPixmapRGBSharedEglContext != qPixmapARGBSharedEglContext &&

            qPixmapRGBSharedEglContext != EGL_NO_CONTEXT)

        {

        }

        qPixmapRGBSharedEglContext = EGL_NO_CONTEXT;

        qPixmapARGBSharedEglContext = EGL_NO_CONTEXT;

    }

    if (haveX11Pixmaps)

        qDebug("QX11GLPixmapData is supported");

    else

        qDebug("QX11GLPixmapData is *NOT* being used");

    return haveX11Pixmaps;

}

QX11GLPixmapData::QX11GLPixmapData()

    : QX11PixmapData(QPixmapData::PixmapType),

      ctx(0)

{

}

QX11GLPixmapData::~QX11GLPixmapData()

{

}

QPaintEngine* QX11GLPixmapData::paintEngine() const

{

    // We need to create the context before beginPaint - do it here:

    if (!ctx) {

        ctx = new QGLContext(glFormat());

        if (ctx->d_func()->eglContext == 0)

            ctx->d_func()->eglContext = new QEglContext();

        ctx->d_func()->eglContext->setApi(QEgl::OpenGL);

        ctx->d_func()->eglContext->setContext(hasAlphaChannel() ? qPixmapARGBSharedEglContext

                                                                : qPixmapRGBSharedEglContext);

    }

    // Support multiple painters on multiple pixmaps simultaniously

        qWarning("Pixmap paint engine already active");

        engine->setAutoDestruct(true);

        return engine;

    }

}

void QX11GLPixmapData::beginPaint()

{

//    qDebug("QX11GLPixmapData::beginPaint()");

    if ((EGLSurface)gl_surface == EGL_NO_SURFACE) {

        qt_createEGLSurfaceForPixmap(this, false);

        ctx->d_func()->eglSurface = (EGLSurface)gl_surface;

        ctx->d_func()->valid = true; // ;-)

    }

    QGLPaintDevice::beginPaint();

}

void QX11GLPixmapData::endPaint()

{

    glFinish();

    QGLPaintDevice::endPaint();

}

QGLContext* QX11GLPixmapData::context() const

{

    return ctx;

}

QSize QX11GLPixmapData::size() const

{

    return QSize(w, h);

}

QGLFormat QX11GLPixmapData::glFormat()

{

    return QGLFormat::defaultFormat(); //###

}

QT_END_NAMESPACE