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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 QSGDISTANCEFIELDUTIL_H
+#define QSGDISTANCEFIELDUTIL_H
+
+#include <qrawfont.h>
+#include <private/qfontengine_p.h>
+#include <private/qsgadaptationlayer_p.h>
+
+QT_BEGIN_NAMESPACE
+
+#define QT_DISTANCEFIELD_DEFAULT_BASEFONTSIZE 54
+#define QT_DISTANCEFIELD_DEFAULT_TILESIZE 64
+#define QT_DISTANCEFIELD_DEFAULT_SCALE 16
+#define QT_DISTANCEFIELD_DEFAULT_RADIUS 80
+#define QT_DISTANCEFIELD_HIGHGLYPHCOUNT 2000
+
+#define QT_DISTANCEFIELD_BASEFONTSIZE(NarrowOutlineFont) \
+ (NarrowOutlineFont ? QT_DISTANCEFIELD_DEFAULT_BASEFONTSIZE * 2 : \
+ QT_DISTANCEFIELD_DEFAULT_BASEFONTSIZE)
+#define QT_DISTANCEFIELD_TILESIZE(NarrowOutlineFont) \
+ (NarrowOutlineFont ? QT_DISTANCEFIELD_DEFAULT_TILESIZE * 2 : \
+ QT_DISTANCEFIELD_DEFAULT_TILESIZE)
+#define QT_DISTANCEFIELD_SCALE(NarrowOutlineFont) \
+ (NarrowOutlineFont ? QT_DISTANCEFIELD_DEFAULT_SCALE / 2 : \
+ QT_DISTANCEFIELD_DEFAULT_SCALE)
+#define QT_DISTANCEFIELD_RADIUS(NarrowOutlineFont) \
+ (NarrowOutlineFont ? QT_DISTANCEFIELD_DEFAULT_RADIUS / 2 : \
+ QT_DISTANCEFIELD_DEFAULT_RADIUS)
+
+
+typedef float (*ThresholdFunc)(float glyphScale);
+typedef float (*AntialiasingSpreadFunc)(float glyphScale);
+
+bool qt_fontHasNarrowOutlines(const QRawFont &f);
+QImage qt_renderDistanceFieldGlyph(const QRawFont &font, glyph_t glyph, bool doubleResolution);
+
+
+class QOpenGLShaderProgram;
+class QSGDistanceFieldGlyphCache;
+class QSGContext;
+
+class Q_QUICK_EXPORT QSGDistanceFieldGlyphCacheManager
+{
+public:
+ QSGDistanceFieldGlyphCacheManager(QSGContext *c);
+ ~QSGDistanceFieldGlyphCacheManager();
+
+ QSGDistanceFieldGlyphCache *cache(const QRawFont &font);
+
+ QSGGlyphNode::AntialiasingMode defaultAntialiasingMode() const { return m_defaultAntialiasingMode; }
+ void setDefaultAntialiasingMode(QSGGlyphNode::AntialiasingMode mode) { m_defaultAntialiasingMode = mode; }
+
+ ThresholdFunc thresholdFunc() const { return m_threshold_func; }
+ void setThresholdFunc(ThresholdFunc func) { m_threshold_func = func; }
+
+ AntialiasingSpreadFunc antialiasingSpreadFunc() const { return m_antialiasingSpread_func; }
+ void setAntialiasingSpreadFunc(AntialiasingSpreadFunc func) { m_antialiasingSpread_func = func; }
+
+private:
+ QHash<QFontEngine *, QSGDistanceFieldGlyphCache *> m_caches;
+
+ QSGContext *sgCtx;
+
+ QSGGlyphNode::AntialiasingMode m_defaultAntialiasingMode;
+ ThresholdFunc m_threshold_func;
+ AntialiasingSpreadFunc m_antialiasingSpread_func;
+};
+
+QT_END_NAMESPACE
+
+#endif // QSGDISTANCEFIELDUTIL_H