/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Copyright (C) 2014 Jolla Ltd, author: <gunnar.sletta@jollamobile.com>
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Scenegraph Playground module 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.
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef CONTEXT_H
#define CONTEXT_H

#include <QtCore/QElapsedTimer>
#include <QtGui/QOpenGLShaderProgram>
#if QT_VERSION >= 0x050800
#include <private/qsgdefaultcontext_p.h>
#include <private/qsgdefaultrendercontext_p.h>
#else
#include <private/qsgcontext_p.h>
#endif

#ifdef CUSTOMCONTEXT_DITHER
#include "renderhooks/ordereddither2x2.h"
#endif

#ifdef CUSTOMCONTEXT_ATLASTEXTURE
#include "atlastexture.h"
#endif

#ifdef CUSTOMCONTEXT_THREADUPLOADTEXTURE
#include "threaduploadtexture.h"
#endif


#if QT_VERSION >= 0x050200
struct QSGMaterialType;
#endif

namespace CustomContext
{

#if QT_VERSION >= 0x050200
#if QT_VERSION >= 0x050800
class RenderContext : public QSGDefaultRenderContext
#else
class RenderContext : public QSGRenderContext
#endif
{
public:
    RenderContext(QSGContext *ctx);
    void initialize(QOpenGLContext *context);
    void invalidate();
    void renderNextFrame(QSGRenderer *renderer, GLuint fbo);

#if QT_VERSION < 0x050600
    QSGTexture *createTexture(const QImage &image) const;
    QSGTexture *createTextureNoAtlas(const QImage &image) const;
#else
    QSGTexture *createTexture(const QImage &image, uint flags) const;
#endif

    QSGRenderer *createRenderer();

#ifdef PROGRAM_BINARY
#if QT_VERSION >= 0x050800
    void compileShader(QSGMaterialShader *shader, QSGMaterial *material, const char *vertex = 0, const char *fragment = 0);
#else
    void compile(QSGMaterialShader *shader, QSGMaterial *material, const char *vertex = 0, const char *fragment = 0);
#endif
#endif

#ifdef CUSTOMCONTEXT_DITHER
    bool m_dither;
    OrderedDither2x2 *m_ditherProgram;
#endif

#ifdef CUSTOMCONTEXT_OVERLAPRENDERER
    bool m_overlapRenderer;
    QOpenGLShaderProgram *m_clipProgram;
    int m_clipMatrixID;

    QElapsedTimer qsg_renderer_timer;
    QSGMaterialShader *prepareMaterial(QSGMaterial *material);
    QHash<QSGMaterialType *, QSGMaterialShader *> m_materials;

#ifdef CUSTOMCONTEXT_MATERIALPRELOAD
    bool m_materialPreloading;
#endif
#endif
};
#endif

#if QT_VERSION >= 0x050800
class Context : public QSGDefaultContext
#else
class Context : public QSGContext
#endif
{
    Q_OBJECT
public:
    explicit Context(QObject *parent = 0);

#if QT_VERSION >= 0x050200
    QSGRenderContext *createRenderContext() { return new RenderContext(this); }
    void renderContextInitialized(QSGRenderContext *renderContext) Q_DECL_OVERRIDE;
#else
    void initialize(QOpenGLContext *context);
    void invalidate();
    void renderNextFrame(QSGRenderer *renderer, GLuint fbo);
    QSGTexture *createTexture(const QImage &image) const;
    QSGRenderer *createRenderer();
#endif

    QAnimationDriver *createAnimationDriver(QObject *parent);
#ifdef CUSTOMCONTEXT_SURFACEFORMAT
    QSurfaceFormat defaultSurfaceFormat() const;
#endif
    QQuickTextureFactory *createTextureFactory(const QImage &image);

#ifdef CUSTOMCONTEXT_MSAA
    QSGImageNode *createImageNode();
    QSGRectangleNode *createRectangleNode();
#endif

#ifdef CUSTOMCONTEXT_NO_DFGLYPHS
    QSGGlyphNode *createGlyphNode();
#endif

#ifdef CUSTOMCONTEXT_EGLGRALLOCTEXTURE
    bool hasEglGrallocTextures() const { return m_eglGrallocTexture; }
#endif

#ifdef CUSTOMCONTEXT_HYBRISTEXTURE
    bool hasHybrisTextures() const { return m_hybrisTexture; }
#endif

private:

    int m_sampleCount;
    uint m_useMultisampling : 1;
    uint m_depthBuffer : 1;

#if QT_VERSION < 0x50200
    friend class RenderContext;

#ifdef CUSTOMCONTEXT_MATERIALPRELOAD
    bool m_materialPreloading;
#endif

#ifdef CUSTOMCONTEXT_DITHER
    bool m_dither;
    OrderedDither2x2 *m_ditherProgram;
#endif

#ifdef CUSTOMCONTEXT_OVERLAPRENDERER
    bool m_overlapRenderer;
    QOpenGLShaderProgram *m_clipProgram;
    int m_clipMatrixID;
#endif

#ifdef CUSTOMCONTEXT_ATLASTEXTURE
    TextureAtlasManager m_atlasManager;
    bool m_atlasTexture;
#endif

#ifdef CUSTOMCONTEXT_MACTEXTURE
    bool m_macTexture;
#endif

#ifdef CUSTOMCONTEXT_THREADUPLOADTEXTURE
    ThreadUploadTextureManager m_threadUploadManager;
    bool m_threadUploadTexture;
#endif

#endif // Qt < 5.2.0

#ifdef CUSTOMCONTEXT_NONPRESERVEDTEXTURE
    bool m_nonPreservedTexture;
    friend class NonPreservedTextureFactory;
#endif

#ifdef CUSTOMCONTEXT_ANIMATIONDRIVER
    bool m_animationDriver;
#endif

#ifdef CUSTOMCONTEXT_SWAPLISTENINGANIMATIONDRIVER
    bool m_swapListeningAnimationDriver;
#endif

#ifdef CUSTOMCONTEXT_MSAA
    bool m_defaultRectangleNodes;
    bool m_defaultImageNodes;
#endif

#ifdef CUSTOMCONTEXT_EGLGRALLOCTEXTURE
    bool m_eglGrallocTexture;
#endif

#ifdef CUSTOMCONTEXT_HYBRISTEXTURE
    bool m_hybrisTexture;
#endif

};

} // namespace

#endif // CONTEXT_H