source: trunk/src/opengl/qglpixelbuffer_p.h@ 966

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QGLPIXELBUFFER_P_H
#define QGLPIXELBUFFER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of the QLibrary class.  This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//

QT_BEGIN_NAMESPACE

QT_BEGIN_INCLUDE_NAMESPACE
#include "QtOpenGL/qglpixelbuffer.h"
#include <private/qgl_p.h>
#include <private/qglpaintdevice_p.h>

#if defined(Q_WS_X11) && defined(QT_NO_EGL)
#include <GL/glx.h>

// The below is needed to for compilation on HPUX, due to broken GLX
// headers. Some of the systems define GLX_VERSION_1_3 without
// defining the GLXFBConfig structure, which is wrong.
#if defined (Q_OS_HPUX) && defined(QT_DEFINE_GLXFBCONFIG_STRUCT)
typedef unsigned long GLXPbuffer;

struct GLXFBConfig {
    int visualType;
    int transparentType;
                                /*    colors are floats scaled to ints */
    int transparentRed, transparentGreen, transparentBlue, transparentAlpha;
    int transparentIndex;

    int visualCaveat;

    int associatedVisualId;
    int screen;

    int drawableType;
    int renderType;

    int maxPbufferWidth, maxPbufferHeight, maxPbufferPixels;
    int optimalPbufferWidth, optimalPbufferHeight;  /* for SGIX_pbuffer */

    int visualSelectGroup;      /* visuals grouped by select priority */

    unsigned int id;

    GLboolean rgbMode;
    GLboolean colorIndexMode;
    GLboolean doubleBufferMode;
    GLboolean stereoMode;
    GLboolean haveAccumBuffer;
    GLboolean haveDepthBuffer;
    GLboolean haveStencilBuffer;

    /* The number of bits present in various buffers */
    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
    GLint depthBits;
    GLint stencilBits;
    GLint indexBits;
    GLint redBits, greenBits, blueBits, alphaBits;
    GLuint redMask, greenMask, blueMask, alphaMask;

    GLuint multiSampleSize;     /* Number of samples per pixel (0 if no ms) */

    GLuint nMultiSampleBuffers; /* Number of available ms buffers */
    GLint maxAuxBuffers;

    /* frame buffer level */
    GLint level;

    /* color ranges (for SGI_color_range) */
    GLboolean extendedRange;
    GLdouble minRed, maxRed;
    GLdouble minGreen, maxGreen;
    GLdouble minBlue, maxBlue;
    GLdouble minAlpha, maxAlpha;
};

#endif // Q_OS_HPUX

#elif defined(Q_WS_WIN)
DECLARE_HANDLE(HPBUFFERARB);
#elif !defined(QT_NO_EGL)
#include <QtGui/private/qegl_p.h>
#endif
QT_END_INCLUDE_NAMESPACE

class QEglContext;


class QGLPBufferGLPaintDevice : public QGLPaintDevice
{
public:
    virtual QPaintEngine* paintEngine() const {return pbuf->paintEngine();}
    virtual QSize size() const {return pbuf->size();}
    virtual QGLContext* context() const;
    virtual void endPaint();
    void setPBuffer(QGLPixelBuffer* pb);
private:
    QGLPixelBuffer* pbuf;
};

class QGLPixelBufferPrivate {
    Q_DECLARE_PUBLIC(QGLPixelBuffer)
public:
    QGLPixelBufferPrivate(QGLPixelBuffer *q) : q_ptr(q), invalid(true), qctx(0), pbuf(0), ctx(0)
    {