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/****************************************************************************
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**
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** Copyright (C) 2009 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 QtGui 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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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qfontengine_s60_p.h"
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#include "qtextengine_p.h"
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#include "qglobal.h"
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#include <private/qapplication_p.h>
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#include "qimage.h"
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#include "qt_s60_p.h"
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#include "qpixmap_s60_p.h"
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#include <e32base.h>
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#include <e32std.h>
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#include <EIKENV.H>
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#include <GDI.H>
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QT_BEGIN_NAMESPACE
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QFontEngineS60Extensions::QFontEngineS60Extensions(CFont* fontOwner, COpenFont *font)
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: m_font(font)
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, m_cmap(0)
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, m_symbolCMap(false)
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, m_fontOwner(fontOwner)
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{
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TAny *shapingExtension = NULL;
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m_font->ExtendedInterface(KUidOpenFontShapingExtension, shapingExtension);
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m_shapingExtension = static_cast<MOpenFontShapingExtension*>(shapingExtension);
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TAny *trueTypeExtension = NULL;
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m_font->ExtendedInterface(KUidOpenFontTrueTypeExtension, trueTypeExtension);
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m_trueTypeExtension = static_cast<MOpenFontTrueTypeExtension*>(trueTypeExtension);
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Q_ASSERT(m_shapingExtension && m_trueTypeExtension);
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}
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QByteArray QFontEngineS60Extensions::getSfntTable(uint tag) const
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{
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Q_ASSERT(m_trueTypeExtension->HasTrueTypeTable(tag));
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TInt error = KErrNone;
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TInt tableByteLength = 0;
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TAny *table = q_check_ptr(m_trueTypeExtension->GetTrueTypeTable(error, tag, &tableByteLength));
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QByteArray result(static_cast<const char*>(table), tableByteLength);
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m_trueTypeExtension->ReleaseTrueTypeTable(table);
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return result;
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}
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const unsigned char *QFontEngineS60Extensions::cmap() const
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{
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if (!m_cmap) {
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m_cmapTable = getSfntTable(MAKE_TAG('c', 'm', 'a', 'p'));
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int size = 0;
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m_cmap = QFontEngineS60::getCMap(reinterpret_cast<const uchar *>(m_cmapTable.constData()), m_cmapTable.size(), &m_symbolCMap, &size);
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}
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return m_cmap;
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}
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QPainterPath QFontEngineS60Extensions::glyphOutline(glyph_t glyph) const
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{
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QPainterPath result;
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QPolygonF polygon;
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TInt glyphIndex = glyph;
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TInt pointNumber = 0;
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TInt x, y;
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while (m_shapingExtension->GlyphPointInFontUnits(glyphIndex, pointNumber++, x, y)) {
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const QPointF point(qreal(x) / 0xffff, qreal(y) / 0xffff);
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if (polygon.contains(point)) {
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result.addPolygon(polygon);
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result.closeSubpath();
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polygon.clear();
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} else {
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polygon.append(point);
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}
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}
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return result;
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}
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CFont *QFontEngineS60Extensions::fontOwner() const
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{
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return m_fontOwner;
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}
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// duplicated from qfontengine_xyz.cpp
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static inline unsigned int getChar(const QChar *str, int &i, const int len)
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{
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unsigned int uc = str[i].unicode();
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if (uc >= 0xd800 && uc < 0xdc00 && i < len-1) {
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uint low = str[i+1].unicode();
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if (low >= 0xdc00 && low < 0xe000) {
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uc = (uc - 0xd800)*0x400 + (low - 0xdc00) + 0x10000;
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++i;
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}
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}
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return uc;
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}
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QFontEngineS60::QFontEngineS60(const QFontDef &request, const QFontEngineS60Extensions *extensions)
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: m_extensions(extensions)
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{
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QFontEngine::fontDef = request;
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m_fontSizeInPixels = (request.pixelSize >= 0)?
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request.pixelSize:pointsToPixels(request.pointSize);
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QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);
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m_textRenderBitmap = q_check_ptr(new CFbsBitmap()); // CBase derived object needs check on new
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const TSize bitmapSize(1, 1); // It is just a dummy bitmap that I need to keep the font alive (or maybe not)
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qt_symbian_throwIfError(m_textRenderBitmap->Create(bitmapSize, EGray256));
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QT_TRAP_THROWING(m_textRenderBitmapDevice = CFbsBitmapDevice::NewL(m_textRenderBitmap));
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qt_symbian_throwIfError(m_textRenderBitmapDevice->CreateContext(m_textRenderBitmapGc));
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cache_cost = sizeof(QFontEngineS60) + bitmapSize.iHeight * bitmapSize.iWidth * 4;
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TFontSpec fontSpec(qt_QString2TPtrC(request.family), m_fontSizeInPixels);
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fontSpec.iFontStyle.SetBitmapType(EAntiAliasedGlyphBitmap);
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fontSpec.iFontStyle.SetPosture(request.style == QFont::StyleNormal?EPostureUpright:EPostureItalic);
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fontSpec.iFontStyle.SetStrokeWeight(request.weight > QFont::Normal?EStrokeWeightBold:EStrokeWeightNormal);
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const TInt errorCode = m_textRenderBitmapDevice->GetNearestFontInPixels(m_font, fontSpec);
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Q_ASSERT(errorCode == 0);
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m_textRenderBitmapGc->UseFont(m_font);
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lock.relock();
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}
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QFontEngineS60::~QFontEngineS60()
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{
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QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);
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m_textRenderBitmapGc->DiscardFont();
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delete m_textRenderBitmapGc;
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m_textRenderBitmapGc = NULL;
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m_textRenderBitmapDevice->ReleaseFont(m_font);
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delete m_textRenderBitmapDevice;
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m_textRenderBitmapDevice = NULL;
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delete m_textRenderBitmap;
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m_textRenderBitmap = NULL;
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lock.relock();
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}
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bool QFontEngineS60::stringToCMap(const QChar *characters, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const
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{
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if (*nglyphs < len) {
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*nglyphs = len;
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return false;
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}
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HB_Glyph *g = glyphs->glyphs;
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const unsigned char* cmap = m_extensions->cmap();
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for (int i = 0; i < len; ++i) {
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const unsigned int uc = getChar(characters, i, len);
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*g++ = QFontEngine::getTrueTypeGlyphIndex(cmap, uc);
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}
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glyphs->numGlyphs = g - glyphs->glyphs;
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*nglyphs = glyphs->numGlyphs;
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if (flags & QTextEngine::GlyphIndicesOnly)
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return true;
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recalcAdvances(glyphs, flags);
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return true;
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}
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void QFontEngineS60::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const
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{
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Q_UNUSED(flags);
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for (int i = 0; i < glyphs->numGlyphs; i++) {
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const glyph_metrics_t bbox = boundingBox_const(glyphs->glyphs[i]);
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glyphs->advances_x[i] = glyphs->offsets[i].x = bbox.xoff;
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glyphs->advances_y[i] = glyphs->offsets[i].y = bbox.yoff;
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}
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}
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QImage QFontEngineS60::alphaMapForGlyph(glyph_t glyph)
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{
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TOpenFontCharMetrics metrics;
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const TUint8 *glyphBitmapBytes;
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TSize glyphBitmapSize;
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getCharacterData(glyph, metrics, glyphBitmapBytes, glyphBitmapSize);
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QImage result(glyphBitmapBytes, glyphBitmapSize.iWidth, glyphBitmapSize.iHeight, glyphBitmapSize.iWidth, QImage::Format_Indexed8);
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result.setColorTable(grayPalette());
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// The above setColorTable() call detached the image data anyway, so why not shape tha data a bit, while we can.
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// CFont::GetCharacterData() returns 8-bit data that obviously was 4-bit data before, and converted to 8-bit incorrectly.
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// The data values are 0x00, 0x10 ... 0xe0, 0xf0. So, a real opaque 0xff is never reached, which we get punished
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// for every time we want to blit this glyph in the raster paint engine.
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// "Fix" is to convert all 0xf0 to 0xff. Is fine, quality wise, and I assume faster than correcting all values.
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// Blitting is however, evidentially faster now.
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const int bpl = result.bytesPerLine();
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for (int row = 0; row < result.height(); ++row) {
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uchar *scanLine = result.scanLine(row);
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for (int column = 0; column < bpl; ++column) {
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if (*scanLine == 0xf0)
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*scanLine = 0xff;
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scanLine++;
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}
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}
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return result;
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}
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glyph_metrics_t QFontEngineS60::boundingBox(const QGlyphLayout &glyphs)
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{
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if (glyphs.numGlyphs == 0)
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return glyph_metrics_t();
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QFixed w = 0;
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for (int i = 0; i < glyphs.numGlyphs; ++i)
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w += glyphs.effectiveAdvance(i);
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return glyph_metrics_t(0, -ascent(), w, ascent()+descent()+1, w, 0);
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}
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glyph_metrics_t QFontEngineS60::boundingBox_const(glyph_t glyph) const
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{
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TOpenFontCharMetrics metrics;
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const TUint8 *glyphBitmapBytes;
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TSize glyphBitmapSize;
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getCharacterData(glyph, metrics, glyphBitmapBytes, glyphBitmapSize);
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TRect glyphBounds;
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metrics.GetHorizBounds(glyphBounds);
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const glyph_metrics_t result(
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glyphBounds.iTl.iX,
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glyphBounds.iTl.iY,
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glyphBounds.Width(),
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glyphBounds.Height(),
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metrics.HorizAdvance(),
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0
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);
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return result;
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}
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glyph_metrics_t QFontEngineS60::boundingBox(glyph_t glyph)
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{
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return boundingBox_const(glyph);
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}
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QFixed QFontEngineS60::ascent() const
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{
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return m_font->FontMaxAscent();
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}
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QFixed QFontEngineS60::descent() const
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{
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return m_font->FontMaxDescent();
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}
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QFixed QFontEngineS60::leading() const
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{
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return 0;
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}
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qreal QFontEngineS60::maxCharWidth() const
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{
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return m_font->MaxCharWidthInPixels();
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}
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const char *QFontEngineS60::name() const
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{
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return "QFontEngineS60";
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}
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bool QFontEngineS60::canRender(const QChar *string, int len)
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{
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const unsigned char *cmap = m_extensions->cmap();
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for (int i = 0; i < len; ++i) {
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const unsigned int uc = getChar(string, i, len);
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if (QFontEngine::getTrueTypeGlyphIndex(cmap, uc) == 0)
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return false;
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}
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return true;
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}
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QByteArray QFontEngineS60::getSfntTable(uint tag) const
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{
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return m_extensions->getSfntTable(tag);
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}
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QFontEngine::Type QFontEngineS60::type() const
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{
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return QFontEngine::S60FontEngine;
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}
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void QFontEngineS60::getCharacterData(glyph_t glyph, TOpenFontCharMetrics& metrics, const TUint8*& bitmap, TSize& bitmapSize) const
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{
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// Setting the most significant bit tells GetCharacterData
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// that 'code' is a Glyph ID, rather than a UTF-16 value
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const TUint specialCode = (TUint)glyph | 0x80000000;
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const CFont::TCharacterDataAvailability availability =
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m_font->GetCharacterData(specialCode, metrics, bitmap, bitmapSize);
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const glyph_t fallbackGlyph = '?';
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if (availability != CFont::EAllCharacterData) {
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const CFont::TCharacterDataAvailability fallbackAvailability =
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m_font->GetCharacterData(fallbackGlyph, metrics, bitmap, bitmapSize);
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Q_ASSERT(fallbackAvailability == CFont::EAllCharacterData);
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}
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}
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QT_END_NAMESPACE
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