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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qglext_p.h"
#include <qopenglfunctions.h>
// copied private header
#include "qglextensions_p.h"
#include <private/qopenglcontext_p.h>
QT_BEGIN_NAMESPACE
#if !defined(QT_OPENGL_ES)
typedef void (QOPENGLF_APIENTRYP q_PFNGLCLIENTACTIVETEXTUREPROC) (GLenum);
class QGLMultiTextureExtensions : public QOpenGLSharedResource
{
public:
QGLMultiTextureExtensions(const QGLContext *ctx)
: QOpenGLSharedResource(ctx ? ctx->contextHandle()->shareGroup() : 0)
{
clientActiveTexture = 0;
multiTextureResolved = false;
}
~QGLMultiTextureExtensions();
void invalidateResource() {}
void freeResource(QOpenGLContext *) {}
q_PFNGLCLIENTACTIVETEXTUREPROC clientActiveTexture;
bool multiTextureResolved;
};
static QGLMultiTextureExtensions *qt_multitexture_funcs;
QGLMultiTextureExtensions::~QGLMultiTextureExtensions()
{
qt_multitexture_funcs = 0;
}
static QGLMultiTextureExtensions *resolveMultiTextureExtensions
(const QGLContext *ctx)
{
if (!qt_multitexture_funcs)
qt_multitexture_funcs = new QGLMultiTextureExtensions(ctx);
if (!(qt_multitexture_funcs->multiTextureResolved)) {
qt_multitexture_funcs->multiTextureResolved = true;
if (!qt_multitexture_funcs->clientActiveTexture) {
qt_multitexture_funcs->clientActiveTexture = (q_PFNGLCLIENTACTIVETEXTUREPROC)
ctx->getProcAddress(QLatin1String("glClientActiveTexture"));
}
if (!qt_multitexture_funcs->clientActiveTexture) {
qt_multitexture_funcs->clientActiveTexture = (q_PFNGLCLIENTACTIVETEXTUREPROC)
ctx->getProcAddress(QLatin1String("glClientActiveTextureARB"));
}
}
return qt_multitexture_funcs;
}
void qt_gl_ClientActiveTexture(GLenum texture)
{
const QGLContext *ctx = QGLContext::currentContext();
if (!ctx)
return;
QGLMultiTextureExtensions *extn = resolveMultiTextureExtensions(ctx);
if (extn->clientActiveTexture)
extn->clientActiveTexture(texture);
}
#endif
QT_END_NAMESPACE
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