source: trunk/src/opengl/qgl_mac.mm@ 754

/****************************************************************************
**
** Copyright (C) 2010 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].
** $QT_END_LICENSE$
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****************************************************************************/

#include "qgl.h"

// There are functions that are deprecated in 10.5, but really there's no way around them
// for Carbon, so just undefine them.
#undef DEPRECATED_ATTRIBUTE
#define DEPRECATED_ATTRIBUTE
#if defined(Q_WS_MAC)
#ifndef QT_MAC_USE_COCOA
#ifdef qDebug
#    undef qDebug
#    include <AGL/agl.h>
#    include <AGL/aglRenderers.h>
#    include <OpenGL/gl.h>
#    ifdef QT_NO_DEBUG
#        define qDebug qt_noop(),1?(void)0:qDebug
#    endif
#else
#    include <AGL/agl.h>
#    include <AGL/aglRenderers.h>
#    include <OpenGL/gl.h>
#endif
#else
#include <private/qcocoaview_mac_p.h>
#endif


#include <OpenGL/gl.h>
#include <CoreServices/CoreServices.h>
#include <private/qfont_p.h>
#include <private/qfontengine_p.h>
#include <private/qgl_p.h>
#include <private/qpaintengine_opengl_p.h>
#include <private/qt_mac_p.h>
#include <qpixmap.h>
#include <qtimer.h>
#include <qapplication.h>
#include <qstack.h>
#include <qdesktopwidget.h>
#include <qdebug.h>

QT_BEGIN_NAMESPACE
#ifdef QT_MAC_USE_COCOA
QT_END_NAMESPACE

QT_FORWARD_DECLARE_CLASS(QWidget)
QT_FORWARD_DECLARE_CLASS(QWidgetPrivate)
QT_FORWARD_DECLARE_CLASS(QGLWidgetPrivate)

QT_BEGIN_NAMESPACE

void *qt_current_nsopengl_context()
{
    return [NSOpenGLContext currentContext];
}

static GLint attribValue(NSOpenGLPixelFormat *fmt, NSOpenGLPixelFormatAttribute attrib)
{
    GLint res;
    [fmt getValues:&res forAttribute:attrib forVirtualScreen:0];
    return res;
}

static int def(int val, int defVal)
{
    return val != -1 ? val : defVal;
}
#else
QRegion qt_mac_get_widget_rgn(const QWidget *widget);
#endif

extern quint32 *qt_mac_pixmap_get_base(const QPixmap *);
extern int qt_mac_pixmap_get_bytes_per_line(const QPixmap *);
extern RgnHandle qt_mac_get_rgn(); //qregion_mac.cpp
extern void qt_mac_dispose_rgn(RgnHandle); //qregion_mac.cpp
extern QRegion qt_mac_convert_mac_region(RgnHandle); //qregion_mac.cpp
extern void qt_mac_to_pascal_string(QString s, Str255 str, TextEncoding encoding=0, int len=-1);  //qglobal.cpp

/*
    QGLTemporaryContext implementation
*/

class QGLTemporaryContextPrivate
{
public:
#ifndef QT_MAC_USE_COCOA
    AGLContext ctx;
#else
    NSOpenGLContext *ctx;
#endif
};

QGLTemporaryContext::QGLTemporaryContext(bool, QWidget *)
    : d(new QGLTemporaryContextPrivate)
{
    d->ctx = 0;
#ifndef QT_MAC_USE_COCOA
    GLint attribs[] = {AGL_RGBA, AGL_NONE};
    AGLPixelFormat fmt = aglChoosePixelFormat(0, 0, attribs);
    if (!fmt) {
        qDebug("QGLTemporaryContext: Couldn't find any RGB visuals");
        return;
    }
    d->ctx = aglCreateContext(fmt, 0);
    if (!d->ctx)
        qDebug("QGLTemporaryContext: Unable to create context");
    else
        aglSetCurrentContext(d->ctx);
    aglDestroyPixelFormat(fmt);
#else
    QMacCocoaAutoReleasePool pool;
    NSOpenGLPixelFormatAttribute attribs[] = { 0 };
    NSOpenGLPixelFormat *fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs];
    if (!fmt) {
        qWarning("QGLTemporaryContext: Cannot find any visuals");
        return;
    }

    d->ctx = [[NSOpenGLContext alloc] initWithFormat:fmt shareContext:0];
    if (!d->ctx)
        qWarning("QGLTemporaryContext: Cannot create context");
    else
        [d->ctx makeCurrentContext];
    [fmt release];
#endif
}

QGLTemporaryContext::~QGLTemporaryContext()
{
    if (d->ctx) {
#ifndef QT_MAC_USE_COCOA
        aglSetCurrentContext(0);
        aglDestroyContext(d->ctx);
#else
        [NSOpenGLContext clearCurrentContext];
        [d->ctx release];
#endif
    }
}

bool QGLFormat::hasOpenGL()
{
    return true;
}

bool QGLFormat::hasOpenGLOverlays()
{
    return false;
}

bool QGLContext::chooseContext(const QGLContext *shareContext)
{
    QMacCocoaAutoReleasePool pool;
    Q_D(QGLContext);
    d->cx = 0;
    d->vi = chooseMacVisual(0);
    if (!d->vi)
        return false;

#ifndef QT_MAC_USE_COCOA
    AGLPixelFormat fmt = (AGLPixelFormat)d->vi;
    GLint res;
    aglDescribePixelFormat(fmt, AGL_LEVEL, &res);
    d->glFormat.setPlane(res);
    if (deviceIsPixmap())
        res = 0;
    else
        aglDescribePixelFormat(fmt, AGL_DOUBLEBUFFER, &res);
    d->glFormat.setDoubleBuffer(res);