| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtGui module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL21$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see http://www.qt.io/terms-conditions. For further |
| ** information use the contact form at http://www.qt.io/contact-us. |
| ** |
| ** 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 or version 3 as published by the Free |
| ** Software Foundation and appearing in the file LICENSE.LGPLv21 and |
| ** LICENSE.LGPLv3 included in the packaging of this file. Please review the |
| ** following information to ensure the GNU Lesser General Public License |
| ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and |
| ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
| ** |
| ** As a special exception, The Qt Company gives you certain additional |
| ** rights. These rights are described in The Qt Company LGPL Exception |
| ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #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> |
| |
| #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(QFontEngine::GlyphFormat format, const QTransform &matrix) |
| : QFontEngineGlyphCache(format, matrix), m_current_fontengine(0), |
| m_w(0), m_h(0), m_cx(0), m_cy(0), m_currentRowHeight(0) |
| { } |
| |
| virtual ~QTextureGlyphCache() { } |
| |
| struct GlyphAndSubPixelPosition |
| { |
| GlyphAndSubPixelPosition(glyph_t g, QFixed spp) : glyph(g), subPixelPosition(spp) {} |
| |
| bool operator==(const GlyphAndSubPixelPosition &other) const |
| { |
| return glyph == other.glyph && subPixelPosition == other.subPixelPosition; |
| } |
| |
| glyph_t glyph; |
| QFixed subPixelPosition; |
| }; |
| |
| struct Coord { |
| int x; |
| int y; |
| int w; |
| int h; |
| |
| int baseLineX; |
| int baseLineY; |
| |
| bool isNull() const |
| { |
| return w == 0 || h == 0; |
| } |
| }; |
| |
| bool populate(QFontEngine *fontEngine, int numGlyphs, const glyph_t *glyphs, |
| const QFixedPoint *positions); |
| bool hasPendingGlyphs() const { return !m_pendingGlyphs.isEmpty(); }; |
| void fillInPendingGlyphs(); |
| |
| virtual void createTextureData(int width, int height) = 0; |
| virtual void resizeTextureData(int width, int height) = 0; |
| virtual int glyphPadding() const { return 0; } |
| |
| virtual void fillTexture(const Coord &coord, glyph_t glyph, QFixed subPixelPosition) = 0; |
| |
| inline void createCache(int width, int height) { |
| m_w = width; |
| m_h = height; |
| createTextureData(width, height); |
| } |
| |
| inline void resizeCache(int width, int height) |
| { |
| resizeTextureData(width, height); |
| m_w = width; |
| m_h = height; |
| } |
| |
| inline bool isNull() const { return m_h == 0; } |
| |
| QHash<GlyphAndSubPixelPosition, Coord> coords; |
| virtual int maxTextureWidth() const { return QT_DEFAULT_TEXTURE_GLYPH_CACHE_WIDTH; } |
| virtual int maxTextureHeight() const { return -1; } |
| |
| QImage textureMapForGlyph(glyph_t g, QFixed subPixelPosition) const; |
| |
| protected: |
| int calculateSubPixelPositionCount(glyph_t) const; |
| |
| QFontEngine *m_current_fontengine; |
| QHash<GlyphAndSubPixelPosition, Coord> m_pendingGlyphs; |
| |
| 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 |
| }; |
| |
| inline uint qHash(const QTextureGlyphCache::GlyphAndSubPixelPosition &g) |
| { |
| return (g.glyph << 8) | (g.subPixelPosition * 10).round().toInt(); |
| } |
| |
| |
| class Q_GUI_EXPORT QImageTextureGlyphCache : public QTextureGlyphCache |
| { |
| public: |
| QImageTextureGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix) |
| : QTextureGlyphCache(format, matrix) { } |
| virtual void createTextureData(int width, int height) Q_DECL_OVERRIDE; |
| virtual void resizeTextureData(int width, int height) Q_DECL_OVERRIDE; |
| virtual void fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition) Q_DECL_OVERRIDE; |
| |
| inline const QImage &image() const { return m_image; } |
| |
| private: |
| QImage m_image; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif |