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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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 are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTEXTUREGLYPHCACHE_P_H
#define QTEXTUREGLYPHCACHE_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 <qhash.h>
#include <qimage.h>
#include <qobject.h>
#include <qtransform.h>
#include <private/qfontengineglyphcache_p.h>
struct glyph_metrics_t;
typedef unsigned int glyph_t;
QT_BEGIN_NAMESPACE
class QTextItemInt;
class Q_GUI_EXPORT QTextureGlyphCache : public QFontEngineGlyphCache
{
public:
QTextureGlyphCache(QFontEngineGlyphCache::Type type, const QTransform &matrix)
: QFontEngineGlyphCache(matrix), m_w(0), m_h(0), m_cx(0), m_cy(0), m_type(type) { }
virtual ~QTextureGlyphCache() { }
struct Coord {
int x;
int y;
int w;
int h;
int baseLineX;
int baseLineY;
};
void populate(const QTextItemInt &ti,
const QVarLengthArray<glyph_t> &glyphs,
const QVarLengthArray<QFixedPoint> &positions);
virtual void createTextureData(int width, int height) = 0;
virtual void resizeTextureData(int width, int height) = 0;
virtual int glyphMargin() const { return 0; }
QFontEngineGlyphCache::Type cacheType() const { return m_type; }
virtual void fillTexture(const Coord &coord, glyph_t glyph) = 0;
inline void createCache(int width, int height) {
m_w = width;
m_h = height;
createTextureData(width, height);
}
inline bool isNull() const { return m_w <= 0 || m_h <= 0; }
QHash<glyph_t, Coord> coords;
protected:
const QTextItemInt *m_current_textitem;
int m_w; // image width
int m_h; // image height
int m_cx; // current x
int m_cy; // current y
QFontEngineGlyphCache::Type m_type;
};
class Q_GUI_EXPORT QImageTextureGlyphCache : public QTextureGlyphCache
{
public:
QImageTextureGlyphCache(QFontEngineGlyphCache::Type type, const QTransform &matrix)
: QTextureGlyphCache(type, matrix) { }
virtual int glyphMargin() const;
virtual void createTextureData(int width, int height);
virtual void resizeTextureData(int width, int height);
virtual void fillTexture(const Coord &c, glyph_t glyph);
inline const QImage &image() const { return m_image; }
private:
QImage m_image;
};
QT_END_NAMESPACE
#endif
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