author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 00:43:10 +0200 | |
changeset 3 | 41300fa6a67c |
parent 0 | 1918ee327afb |
child 4 | 3b1da2848fc7 |
permissions | -rw-r--r-- |
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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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41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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** This file is part of the QtGui module 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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41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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#include <eikenv.h> |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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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 |