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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** 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
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef DRMEGLSERVERBUFFERINTEGRATION_H
#define DRMEGLSERVERBUFFERINTEGRATION_H

#include <QtWaylandClient/private/qwayland-wayland.h>
#include "qwayland-drm-egl-server-buffer.h"
#include <QtWaylandClient/private/qwaylandserverbufferintegration_p.h>

#include "drmeglserverbufferintegration.h"
#include <QtWaylandClient/private/qwaylanddisplay_p.h>
#include <QtCore/QTextStream>

#include <EGL/egl.h>
#include <EGL/eglext.h>
#ifndef EGL_KHR_image
typedef void *EGLImageKHR;
typedef EGLImageKHR (EGLAPIENTRYP PFNEGLCREATEIMAGEKHRPROC) (EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list);
typedef EGLBoolean (EGLAPIENTRYP PFNEGLDESTROYIMAGEKHRPROC) (EGLDisplay dpy, EGLImageKHR image);
#endif

#ifndef GL_OES_EGL_image
typedef void (GL_APIENTRYP PFNGLEGLIMAGETARGETTEXTURE2DOESPROC) (GLenum target, GLeglImageOES image);
#endif

QT_BEGIN_NAMESPACE

class DrmEglServerBufferIntegration;

class DrmServerBuffer : public QWaylandServerBuffer
{
public:
    DrmServerBuffer(DrmEglServerBufferIntegration *integration, int32_t name, int32_t width, int32_t height, int32_t stride, int32_t format);
    ~DrmServerBuffer();
    void bindTextureToBuffer() Q_DECL_OVERRIDE;
private:
    DrmEglServerBufferIntegration *m_integration;
    EGLImageKHR m_image;
};

class DrmEglServerBufferIntegration
    : public QWaylandServerBufferIntegration
    , public QtWayland::wl_registry
    , public QtWayland::qt_drm_egl_server_buffer
{
public:
    void initialize(QWaylandDisplay *display) Q_DECL_OVERRIDE;

    virtual QWaylandServerBuffer *serverBuffer(struct qt_server_buffer *buffer) Q_DECL_OVERRIDE;

    inline EGLImageKHR eglCreateImageKHR(EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list);
    inline EGLBoolean eglDestroyImageKHR (EGLImageKHR image);
    inline void glEGLImageTargetTexture2DOES (GLenum target, GLeglImageOES image);
protected:
    void registry_global(uint32_t name, const QString &interface, uint32_t version) Q_DECL_OVERRIDE;
    void drm_egl_server_buffer_server_buffer_created(struct ::qt_server_buffer *id, int32_t name, int32_t width, int32_t height, int32_t stride, int32_t format) Q_DECL_OVERRIDE;
private:
    PFNEGLCREATEIMAGEKHRPROC m_egl_create_image;
    PFNEGLDESTROYIMAGEKHRPROC m_egl_destroy_image;
    PFNGLEGLIMAGETARGETTEXTURE2DOESPROC m_gl_egl_image_target_texture;
    EGLDisplay m_egl_display;
};

EGLImageKHR DrmEglServerBufferIntegration::eglCreateImageKHR(EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list)
{
    if (!m_egl_create_image) {
        qWarning("DrmEglServerBufferIntegration: Trying to used unresolved function eglCreateImageKHR");
        return EGL_NO_IMAGE_KHR;
    }
    return m_egl_create_image(m_egl_display, ctx, target, buffer,attrib_list);
}

EGLBoolean DrmEglServerBufferIntegration::eglDestroyImageKHR (EGLImageKHR image)
{
    if (!m_egl_destroy_image) {
        qWarning("DrmEglServerBufferIntegration: Trying to use unresolved function eglDestroyImageKHR");
        return false;
    }
    return m_egl_destroy_image(m_egl_display, image);
}

void DrmEglServerBufferIntegration::glEGLImageTargetTexture2DOES (GLenum target, GLeglImageOES image)
{
    if (!m_gl_egl_image_target_texture) {
        qWarning("DrmEglServerBufferIntegration: Trying to use unresolved function glEGLImageTargetRenderbufferStorageOES");
        return;
    }
    m_gl_egl_image_target_texture(target,image);
}
QT_END_NAMESPACE

#endif