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Diffstat (limited to 'src/gui/text/qfontengine_s60.cpp')
| -rw-r--r-- | src/gui/text/qfontengine_s60.cpp | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/src/gui/text/qfontengine_s60.cpp b/src/gui/text/qfontengine_s60.cpp new file mode 100644 index 0000000..2e1abb2 --- /dev/null +++ b/src/gui/text/qfontengine_s60.cpp @@ -0,0 +1,326 @@ +/**************************************************************************** +** +** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the $MODULE$ of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qfontengine_s60_p.h" +#include "qtextengine_p.h" +#include "qglobal.h" +#include <private/qapplication_p.h> +#include <private/qwindowsurface_s60_p.h> +#include "qimage.h" +#include "qt_s60_p.h" + +#include <e32base.h> +#include <e32std.h> +#include <EIKENV.H> +#include <GDI.H> + +QT_BEGIN_NAMESPACE + +static const int maxFontSizeInPixels = 60; + +QFontEngineS60Extensions::QFontEngineS60Extensions(COpenFont *font) + : m_font(font) + , m_cmap(0) + , m_symbolCMap(false) +{ + TAny *shapingExtension = NULL; + m_font->ExtendedInterface(KUidOpenFontShapingExtension, shapingExtension); + m_shapingExtension = static_cast<MOpenFontShapingExtension*>(shapingExtension); + TAny *trueTypeExtension = NULL; + m_font->ExtendedInterface(KUidOpenFontTrueTypeExtension, trueTypeExtension); + m_trueTypeExtension = static_cast<MOpenFontTrueTypeExtension*>(trueTypeExtension); + Q_ASSERT(m_shapingExtension && m_trueTypeExtension); +} + +QByteArray QFontEngineS60Extensions::getSfntTable(uint tag) const +{ + Q_ASSERT(m_trueTypeExtension->HasTrueTypeTable(tag)); + TInt error = KErrNone; + TInt tableByteLength = 0; + TAny *table = m_trueTypeExtension->GetTrueTypeTable(error, tag, &tableByteLength); + QByteArray result(static_cast<const char*>(table), tableByteLength); + m_trueTypeExtension->ReleaseTrueTypeTable(table); + return result; +} + +const unsigned char *QFontEngineS60Extensions::cmap() const +{ + if (!m_cmap) { + m_cmapTable = getSfntTable(MAKE_TAG('c', 'm', 'a', 'p')); + int size = 0; + m_cmap = QFontEngineS60::getCMap(reinterpret_cast<const uchar *>(m_cmapTable.constData()), m_cmapTable.size(), &m_symbolCMap, &size); + } + return m_cmap; +} + +QPainterPath QFontEngineS60Extensions::glyphOutline(glyph_t glyph) const +{ + QPainterPath result; + QPolygonF polygon; + TInt glyphIndex = glyph; + TInt pointNumber = 0; + TInt x, y; + while (m_shapingExtension->GlyphPointInFontUnits(glyphIndex, pointNumber++, x, y)) { + const QPointF point(qreal(x) / 0xffff, qreal(y) / 0xffff); + if (polygon.contains(point)) { + result.addPolygon(polygon); + result.closeSubpath(); + polygon.clear(); + } else { + polygon.append(point); + } + } + return result; +} + +// duplicated from qfontengine_xyz.cpp +static inline unsigned int getChar(const QChar *str, int &i, const int len) +{ + unsigned int uc = str[i].unicode(); + if (uc >= 0xd800 && uc < 0xdc00 && i < len-1) { + uint low = str[i+1].unicode(); + if (low >= 0xdc00 && low < 0xe000) { + uc = (uc - 0xd800)*0x400 + (low - 0xdc00) + 0x10000; + ++i; + } + } + return uc; +} + +QFontEngineS60::QFontEngineS60(const QFontDef &request, const QFontEngineS60Extensions *extensions) + : m_extensions(extensions) +{ + QFontEngine::fontDef = request; + m_fontSizeInPixels = (request.pixelSize >= 0)? + request.pixelSize:pointsToPixels(request.pointSize); + QS60WindowSurface::unlockBitmapHeap(); + m_textRenderBitmap = new (ELeave) CFbsBitmap(); + const TSize bitmapSize(1, 1); // It is just a dummy bitmap that I need to keep the font alive (or maybe not) + User::LeaveIfError(m_textRenderBitmap->Create(bitmapSize, EGray256)); + m_textRenderBitmapDevice = CFbsBitmapDevice::NewL(m_textRenderBitmap); + User::LeaveIfError(m_textRenderBitmapDevice->CreateContext(m_textRenderBitmapGc)); + cache_cost = sizeof(QFontEngineS60) + bitmapSize.iHeight * bitmapSize.iWidth * 4; + + TFontSpec fontSpec(qt_QString2TPtrC(request.family), m_fontSizeInPixels); + fontSpec.iFontStyle.SetBitmapType(EAntiAliasedGlyphBitmap); + fontSpec.iFontStyle.SetPosture(request.style == QFont::StyleNormal?EPostureUpright:EPostureItalic); + fontSpec.iFontStyle.SetStrokeWeight(request.weight > QFont::Normal?EStrokeWeightBold:EStrokeWeightNormal); + const TInt errorCode = m_textRenderBitmapDevice->GetNearestFontInPixels(m_font, fontSpec); + Q_ASSERT(errorCode == 0); + m_textRenderBitmapGc->UseFont(m_font); + QS60WindowSurface::lockBitmapHeap(); +} + +QFontEngineS60::~QFontEngineS60() +{ + QS60WindowSurface::unlockBitmapHeap(); + m_textRenderBitmapGc->DiscardFont(); + delete m_textRenderBitmapGc; + m_textRenderBitmapGc = NULL; + m_textRenderBitmapDevice->ReleaseFont(m_font); + delete m_textRenderBitmapDevice; + m_textRenderBitmapDevice = NULL; + delete m_textRenderBitmap; + m_textRenderBitmap = NULL; + QS60WindowSurface::lockBitmapHeap(); +} + +bool QFontEngineS60::stringToCMap(const QChar *characters, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const +{ + if (*nglyphs < len) { + *nglyphs = len; + return false; + } + + HB_Glyph *g = glyphs->glyphs; + const unsigned char* cmap = m_extensions->cmap(); + for (int i = 0; i < len; ++i) { + const unsigned int uc = getChar(characters, i, len); + *g++ = QFontEngine::getTrueTypeGlyphIndex(cmap, uc); + } + + glyphs->numGlyphs = g - glyphs->glyphs; + *nglyphs = glyphs->numGlyphs; + + if (flags & QTextEngine::GlyphIndicesOnly) + return true; + + recalcAdvances(glyphs, flags); + return true; +} + +void QFontEngineS60::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const +{ + Q_UNUSED(flags); + for (int i = 0; i < glyphs->numGlyphs; i++) { + const glyph_metrics_t bbox = boundingBox_const(glyphs->glyphs[i]); + glyphs->advances_x[i] = glyphs->offsets[i].x = bbox.xoff; + glyphs->advances_y[i] = glyphs->offsets[i].y = bbox.yoff; + } +} + +QImage QFontEngineS60::alphaMapForGlyph(glyph_t glyph) +{ + TOpenFontCharMetrics metrics; + const TUint8 *glyphBitmapBytes; + TSize glyphBitmapSize; + getCharacterData(glyph, metrics, glyphBitmapBytes, glyphBitmapSize); + QImage result(glyphBitmapBytes, glyphBitmapSize.iWidth, glyphBitmapSize.iHeight, glyphBitmapSize.iWidth, QImage::Format_Indexed8); + result.setColorTable(grayPalette()); + + // The above setColorTable() call detached the image data anyway, so why not shape tha data a bit, while we can. + // CFont::GetCharacterData() returns 8-bit data that obviously was 4-bit data before, and converted to 8-bit incorrectly. + // The data values are 0x00, 0x10 ... 0xe0, 0xf0. So, a real opaque 0xff is never reached, which we get punished + // for every time we want to blit this glyph in the raster paint engine. + // "Fix" is to convert all 0xf0 to 0xff. Is fine, quality wise, and I assume faster than correcting all values. + // Blitting is however, evidentially faster now. + const int bpl = result.bytesPerLine(); + for (int row = 0; row < result.height(); ++row) { + uchar *scanLine = result.scanLine(row); + for (int column = 0; column < bpl; ++column) { + if (*scanLine == 0xf0) + *scanLine = 0xff; + scanLine++; + } + } + + return result; +} + +glyph_metrics_t QFontEngineS60::boundingBox(const QGlyphLayout &glyphs) +{ + if (glyphs.numGlyphs == 0) + return glyph_metrics_t(); + + QFixed w = 0; + for (int i = 0; i < glyphs.numGlyphs; ++i) + w += glyphs.effectiveAdvance(i); + + return glyph_metrics_t(0, -ascent(), w, ascent()+descent()+1, w, 0); +} + +glyph_metrics_t QFontEngineS60::boundingBox_const(glyph_t glyph) const +{ + TOpenFontCharMetrics metrics; + const TUint8 *glyphBitmapBytes; + TSize glyphBitmapSize; + getCharacterData(glyph, metrics, glyphBitmapBytes, glyphBitmapSize); + TRect glyphBounds; + metrics.GetHorizBounds(glyphBounds); + const glyph_metrics_t result( + glyphBounds.iTl.iX, + glyphBounds.iTl.iY, + glyphBounds.Width(), + glyphBounds.Height(), + metrics.HorizAdvance(), + 0 + ); + return result; +} + +glyph_metrics_t QFontEngineS60::boundingBox(glyph_t glyph) +{ + return boundingBox_const(glyph); +} + +QFixed QFontEngineS60::ascent() const +{ + return m_font->FontMaxAscent(); +} + +QFixed QFontEngineS60::descent() const +{ + return m_font->FontMaxDescent(); +} + +QFixed QFontEngineS60::leading() const +{ + return 0; +} + +qreal QFontEngineS60::maxCharWidth() const +{ + return m_font->MaxCharWidthInPixels(); +} + +const char *QFontEngineS60::name() const +{ + return "QFontEngineS60"; +} + +bool QFontEngineS60::canRender(const QChar *string, int len) +{ + const unsigned char *cmap = m_extensions->cmap(); + for (int i = 0; i < len; ++i) { + const unsigned int uc = getChar(string, i, len); + if (QFontEngine::getTrueTypeGlyphIndex(cmap, uc) == 0) + return false; + } + return true; +} + +QByteArray QFontEngineS60::getSfntTable(uint tag) const +{ + return m_extensions->getSfntTable(tag); +} + +QFontEngine::Type QFontEngineS60::type() const +{ + return QFontEngine::S60FontEngine; +} + +void QFontEngineS60::getCharacterData(glyph_t glyph, TOpenFontCharMetrics& metrics, const TUint8*& bitmap, TSize& bitmapSize) const +{ + // Setting the most significant bit tells GetCharacterData + // that 'code' is a Glyph ID, rather than a UTF-16 value + const TUint specialCode = (TUint)glyph | 0x80000000; + + const CFont::TCharacterDataAvailability availability = + m_font->GetCharacterData(specialCode, metrics, bitmap, bitmapSize); + const glyph_t fallbackGlyph = '?'; + if (availability != CFont::EAllCharacterData) { + const CFont::TCharacterDataAvailability fallbackAvailability = + m_font->GetCharacterData(fallbackGlyph, metrics, bitmap, bitmapSize); + Q_ASSERT(fallbackAvailability == CFont::EAllCharacterData); + } +} + +QT_END_NAMESPACE |