/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtOpenGL module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QTEXTUREGLYPHCACHE_GL_P_H+
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#define QTEXTUREGLYPHCACHE_GL_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists for the convenience+
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// of the QLibrary class.  This header file may change from+
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// version to version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include <private/qtextureglyphcache_p.h>+
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#include <private/qgl_p.h>+
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#include <qglshaderprogram.h>+
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+
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+
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QT_BEGIN_NAMESPACE+
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+
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class QGL2PaintEngineExPrivate;+
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+
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class Q_OPENGL_EXPORT QGLTextureGlyphCache : public QObject, public QImageTextureGlyphCache+
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{+
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    Q_OBJECT+
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public:+
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    QGLTextureGlyphCache(QGLContext *context, QFontEngineGlyphCache::Type type, const QTransform &matrix);+
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    ~QGLTextureGlyphCache();+
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+
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    virtual void createTextureData(int width, int height);+
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    virtual void resizeTextureData(int width, int height);+
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    virtual void fillTexture(const Coord &c, glyph_t glyph);+
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    virtual int glyphPadding() const;+
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+
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    inline GLuint texture() const { return m_texture; }+
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+
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    inline int width() const { return m_width; }+
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    inline int height() const { return m_height; }+
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+
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    inline void setPaintEnginePrivate(QGL2PaintEngineExPrivate *p) { pex = p; }+
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+
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+
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public Q_SLOTS:+
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    void contextDestroyed(const QGLContext *context) {+
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        if (context == ctx) {+
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            const QGLContext *nextCtx = qt_gl_transfer_context(ctx);+
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            if (!nextCtx) {+
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                // the context may not be current, so we cannot directly+
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                // destroy the fbo and texture here, but since the context+
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                // is about to be destroyed, the GL server will do the+
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                // clean up for us anyway+
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                m_fbo = 0;+
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                m_texture = 0;+
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                ctx = 0;+
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            } else {+
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                // since the context holding the texture is shared, and+
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                // about to be destroyed, we have to transfer ownership+
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                // of the texture to one of the share contexts+
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                ctx = const_cast<QGLContext *>(nextCtx);+
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            }+
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        }+
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    }+
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+
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private:+
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    QGLContext *ctx;+
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+
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    QGL2PaintEngineExPrivate *pex;+
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+
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    GLuint m_texture;+
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    GLuint m_fbo;+
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+
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    int m_width;+
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    int m_height;+
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+
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    QGLShaderProgram *m_program;+
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};+
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+
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QT_END_NAMESPACE+
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+
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#endif+
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+
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