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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 QtOpenVG 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.
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QGLTEXTUREPOOL_P_H
-#define QGLTEXTUREPOOL_P_H
-
-//
-// W A R N I N G
-// -------------
-//
-// This file is not part of the Qt API. It exists for the convenience
-// of other Qt classes. This header file may change from version to
-// version without notice, or even be removed.
-//
-// We mean it.
-//
-
-#include "qgl.h"
-#include <QtCore/qscopedpointer.h>
-
-QT_BEGIN_NAMESPACE
-
-class QGLPixmapData;
-class QGLTexturePoolPrivate;
-
-class QGLTexturePool
-{
-public:
- QGLTexturePool();
- virtual ~QGLTexturePool();
-
- static QGLTexturePool *instance();
-
- // Create a new texture with the specified parameters and associate
- // it with "data". The QGLPixmapData will be notified when the
- // texture needs to be reclaimed by the pool.
- //
- // This function will call reclaimSpace() when texture creation fails.
- GLuint createTextureForPixmap(GLenum target,
- GLint level,
- GLint internalformat,
- GLsizei width,
- GLsizei height,
- GLenum format,
- GLenum type,
- QGLPixmapData *data);
-
- // Create a permanent texture with the specified parameters.
- // If there is insufficient space for the texture,
- // then this function will call reclaimSpace() and try again.
- //
- // The caller is responsible for calling glDeleteTextures()
- // when it no longer needs the texture, as the texture is not
- // recorded in the texture pool.
- bool createPermanentTexture(GLuint texture,
- GLenum target,
- GLint level,
- GLint internalformat,
- GLsizei width,
- GLsizei height,
- GLenum format,
- GLenum type,
- const GLvoid *data);
-
- // Release a texture that is no longer required.
- void releaseTexture(QGLPixmapData *data, GLuint texture);
-
- // Notify the pool that a QGLPixmapData object is using
- // an texture again. This allows the pool to move the texture
- // within a least-recently-used list of QGLPixmapData objects.
- void useTexture(QGLPixmapData *data);
-
- // Notify the pool that the texture associated with a
- // QGLPixmapData is being detached from the pool. The caller
- // will become responsible for calling glDeleteTextures().
- void detachTexture(QGLPixmapData *data);
-
- // Reclaim space for an image allocation with the specified parameters.
- // Returns true if space was reclaimed, or false if there is no
- // further space that can be reclaimed. The "data" parameter
- // indicates the pixmap that is trying to obtain space which should
- // not itself be reclaimed.
- bool reclaimSpace(GLint internalformat,
- GLsizei width,
- GLsizei height,
- GLenum format,
- GLenum type,
- QGLPixmapData *data);
-
- // Hibernate the image pool because the context is about to be
- // destroyed. All textures left in the pool should be released.
- void hibernate();
-
-protected:
- // Helper functions for managing the LRU list of QGLPixmapData objects.
- void moveToHeadOfLRU(QGLPixmapData *data);
- void removeFromLRU(QGLPixmapData *data);
- QGLPixmapData *pixmapLRU();
-
-private:
- QScopedPointer<QGLTexturePoolPrivate> d_ptr;
-
- Q_DECLARE_PRIVATE(QGLTexturePool)
- Q_DISABLE_COPY(QGLTexturePool)
-};
-
-QT_END_NAMESPACE
-
-#endif