/**************************************************************************** | |
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtGui module of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
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** file. Please review the following information to ensure the GNU Lesser | |
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** 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 | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#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> | |
#if defined(Q_OS_VXWORKS) && defined(m_type) | |
# undef m_type | |
#endif | |
#ifndef QT_DEFAULT_TEXTURE_GLYPH_CACHE_WIDTH | |
#define QT_DEFAULT_TEXTURE_GLYPH_CACHE_WIDTH 256 | |
#endif | |
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, type), m_current_fontengine(0), | |
m_w(0), m_h(0), m_cx(0), m_cy(0), m_currentRowHeight(0) | |
{ } | |
virtual ~QTextureGlyphCache() { } | |
struct Coord { | |
int x; | |
int y; | |
int w; | |
int h; | |
int baseLineX; | |
int baseLineY; | |
}; | |
bool populate(QFontEngine *fontEngine, int numGlyphs, const glyph_t *glyphs, | |
const QFixedPoint *positions); | |
virtual void createTextureData(int width, int height) = 0; | |
virtual void resizeTextureData(int width, int height) = 0; | |
virtual int glyphMargin() const { return 0; } | |
virtual int glyphPadding() const { return 0; } | |
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; | |
QImage textureMapForGlyph(glyph_t g) const; | |
virtual int maxTextureWidth() const { return QT_DEFAULT_TEXTURE_GLYPH_CACHE_WIDTH; } | |
virtual int maxTextureHeight() const { return -1; } | |
protected: | |
QFontEngine *m_current_fontengine; | |
int m_w; // image width | |
int m_h; // image height | |
int m_cx; // current x | |
int m_cy; // current y | |
int m_currentRowHeight; // Height of last row | |
}; | |
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 |