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Diffstat (limited to 'src/gui/text/qfontengine_s60.cpp')
| -rw-r--r-- | src/gui/text/qfontengine_s60.cpp | 569 |
1 files changed, 569 insertions, 0 deletions
diff --git a/src/gui/text/qfontengine_s60.cpp b/src/gui/text/qfontengine_s60.cpp new file mode 100644 index 0000000000..e9b54e350f --- /dev/null +++ b/src/gui/text/qfontengine_s60.cpp @@ -0,0 +1,569 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui 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 Technology Preview License Agreement accompanying +** this package. +** +** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qfontengine_s60_p.h" +#include "qtextengine_p.h" +#include "qendian.h" +#include "qglobal.h" +#include <private/qapplication_p.h> +#include "qimage.h" +#include <private/qt_s60_p.h> +#include <private/qpixmap_s60_p.h> + +#include <e32base.h> +#include <e32std.h> +#include <eikenv.h> +#include <gdi.h> +#if defined(Q_SYMBIAN_HAS_GLYPHOUTLINE_API) +#include <graphics/gdi/gdiplatapi.h> +#endif // Q_SYMBIAN_HAS_GLYPHOUTLINE_API + +// Replication of TGetFontTableParam & friends. +// There is unfortunately no compile time flag like SYMBIAN_FONT_TABLE_API +// that would help us to only replicate these things for Symbian versions +// that do not yet have the font table Api. Symbian's public SDK does +// generally not define any usable macros. +class QSymbianTGetFontTableParam +{ +public: + TUint32 iTag; + TAny *iContent; + TInt iLength; +}; +const TUid QSymbianKFontGetFontTable = {0x102872C1}; +const TUid QSymbianKFontReleaseFontTable = {0x2002AC24}; + +QT_BEGIN_NAMESPACE + +QSymbianTypeFaceExtras::QSymbianTypeFaceExtras(CFont* cFont, COpenFont *openFont) + : m_cFont(cFont) + , m_symbolCMap(false) + , m_openFont(openFont) +{ + if (!symbianFontTableApiAvailable()) { + TAny *trueTypeExtension = NULL; + m_openFont->ExtendedInterface(KUidOpenFontTrueTypeExtension, trueTypeExtension); + m_trueTypeExtension = static_cast<MOpenFontTrueTypeExtension*>(trueTypeExtension); + Q_ASSERT(m_trueTypeExtension); + } +} + +QSymbianTypeFaceExtras::~QSymbianTypeFaceExtras() +{ + if (symbianFontTableApiAvailable()) + S60->screenDevice()->ReleaseFont(m_cFont); +} + +QByteArray QSymbianTypeFaceExtras::getSfntTable(uint tag) const +{ + if (symbianFontTableApiAvailable()) { + QSymbianTGetFontTableParam fontTableParams = { tag, 0, 0 }; + if (m_cFont->ExtendedFunction(QSymbianKFontGetFontTable, &fontTableParams) == KErrNone) { + const char* const fontTableContent = + static_cast<const char *>(fontTableParams.iContent); + const QByteArray fontTable(fontTableContent, fontTableParams.iLength); + m_cFont->ExtendedFunction(QSymbianKFontReleaseFontTable, &fontTableParams); + return fontTable; + } + return QByteArray(); + } else { + Q_ASSERT(m_trueTypeExtension->HasTrueTypeTable(tag)); + TInt error = KErrNone; + TInt tableByteLength = 0; + TAny *table = m_trueTypeExtension->GetTrueTypeTable(error, tag, &tableByteLength); + Q_CHECK_PTR(table); + const QByteArray result(static_cast<const char*>(table), tableByteLength); + m_trueTypeExtension->ReleaseTrueTypeTable(table); + return result; + } +} + +bool QSymbianTypeFaceExtras::getSfntTableData(uint tag, uchar *buffer, uint *length) const +{ + bool result = true; + if (symbianFontTableApiAvailable()) { + QSymbianTGetFontTableParam fontTableParams = { tag, 0, 0 }; + if (m_cFont->ExtendedFunction(QSymbianKFontGetFontTable, &fontTableParams) == KErrNone) { + if (*length > 0 && *length < fontTableParams.iLength) { + result = false; // Caller did not allocate enough memory + } else { + *length = fontTableParams.iLength; + if (buffer) + memcpy(buffer, fontTableParams.iContent, fontTableParams.iLength); + } + m_cFont->ExtendedFunction(QSymbianKFontReleaseFontTable, &fontTableParams); + } else { + result = false; + } + } else { + if (!m_trueTypeExtension->HasTrueTypeTable(tag)) + return false; + + TInt error = KErrNone; + TInt tableByteLength; + TAny *table = m_trueTypeExtension->GetTrueTypeTable(error, tag, &tableByteLength); + Q_CHECK_PTR(table); + + if (error != KErrNone) { + return false; + } else if (*length > 0 && *length < tableByteLength) { + result = false; // Caller did not allocate enough memory + } else { + *length = tableByteLength; + if (buffer) + memcpy(buffer, table, tableByteLength); + } + + m_trueTypeExtension->ReleaseTrueTypeTable(table); + } + return result; +} + +const uchar *QSymbianTypeFaceExtras::cmap() const +{ + if (m_cmapTable.isNull()) { + const QByteArray cmapTable = getSfntTable(MAKE_TAG('c', 'm', 'a', 'p')); + int size = 0; + const uchar *cmap = QFontEngine::getCMap(reinterpret_cast<const uchar *> + (cmapTable.constData()), cmapTable.size(), &m_symbolCMap, &size); + m_cmapTable = QByteArray(reinterpret_cast<const char *>(cmap), size); + } + return reinterpret_cast<const uchar *>(m_cmapTable.constData()); +} + +bool QSymbianTypeFaceExtras::isSymbolCMap() const +{ + return m_symbolCMap; +} + +CFont *QSymbianTypeFaceExtras::fontOwner() const +{ + return m_cFont; +} + +QFixed QSymbianTypeFaceExtras::unitsPerEm() const +{ + if (m_unitsPerEm.value() != 0) + return m_unitsPerEm; + const QByteArray head = getSfntTable(MAKE_TAG('h', 'e', 'a', 'd')); + const int unitsPerEmOffset = 18; + if (head.size() > unitsPerEmOffset + sizeof(quint16)) { + const uchar* tableData = reinterpret_cast<const uchar*>(head.constData()); + const uchar* unitsPerEm = tableData + unitsPerEmOffset; + m_unitsPerEm = qFromBigEndian<quint16>(unitsPerEm); + } else { + // Bitmap font? Corrupt font? + // We return -1 and let the QFontEngineS60 return the pixel size. + m_unitsPerEm = -1; + } + return m_unitsPerEm; +} + +bool QSymbianTypeFaceExtras::symbianFontTableApiAvailable() +{ + enum FontTableApiAvailability { + Unknown, + Available, + Unavailable + }; + static FontTableApiAvailability availability = + QSysInfo::symbianVersion() < QSysInfo::SV_SF_3 ? + Unavailable : Unknown; + if (availability == Unknown) { + // Actually, we should ask CFeatureDiscovery::IsFeatureSupportedL() + // with FfFontTable here. But since at the time of writing, the + // FfFontTable flag check either gave false positives or false + // negatives. Here comes an implicit check via CFont::ExtendedFunction. + QSymbianTGetFontTableParam fontTableParams = { + MAKE_TAG('O', 'S', '/', '2'), 0, 0 }; + QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock); + CFont *font; + const TInt getFontErr = S60->screenDevice()->GetNearestFontInTwips(font, TFontSpec()); + Q_ASSERT(getFontErr == KErrNone); + if (font->ExtendedFunction(QSymbianKFontGetFontTable, &fontTableParams) == KErrNone) { + font->ExtendedFunction(QSymbianKFontReleaseFontTable, &fontTableParams); + availability = Available; + } else { + availability = Unavailable; + } + S60->screenDevice()->ReleaseFont(font); + lock.relock(); + } + return availability == Available; +} + +// 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; +} + +extern QString qt_symbian_fontNameWithAppFontMarker(const QString &fontName); // qfontdatabase_s60.cpp + +CFont *QFontEngineS60::fontWithSize(qreal size) const +{ + CFont *result = 0; + const QString family = qt_symbian_fontNameWithAppFontMarker(QFontEngine::fontDef.family); + TFontSpec fontSpec(qt_QString2TPtrC(family), TInt(size)); + fontSpec.iFontStyle.SetBitmapType(EAntiAliasedGlyphBitmap); + fontSpec.iFontStyle.SetPosture(QFontEngine::fontDef.style == QFont::StyleNormal?EPostureUpright:EPostureItalic); + fontSpec.iFontStyle.SetStrokeWeight(QFontEngine::fontDef.weight > QFont::Normal?EStrokeWeightBold:EStrokeWeightNormal); + const TInt errorCode = S60->screenDevice()->GetNearestFontToDesignHeightInPixels(result, fontSpec); + Q_ASSERT(result && (errorCode == 0)); + return result; +} + +void QFontEngineS60::setFontScale(qreal scale) +{ + if (qFuzzyCompare(scale, qreal(1))) { + if (!m_originalFont) + m_originalFont = fontWithSize(m_originalFontSizeInPixels); + m_activeFont = m_originalFont; + } else { + const qreal scaledFontSizeInPixels = m_originalFontSizeInPixels * scale; + if (!m_scaledFont || + (TInt(scaledFontSizeInPixels) != TInt(m_scaledFontSizeInPixels))) { + releaseFont(m_scaledFont); + m_scaledFontSizeInPixels = scaledFontSizeInPixels; + m_scaledFont = fontWithSize(m_scaledFontSizeInPixels); + } + m_activeFont = m_scaledFont; + } +} + +void QFontEngineS60::releaseFont(CFont *&font) +{ + if (font) { + S60->screenDevice()->ReleaseFont(font); + font = 0; + } +} + +QFontEngineS60::QFontEngineS60(const QFontDef &request, const QSymbianTypeFaceExtras *extras) + : m_extras(extras) + , m_originalFont(0) + , m_originalFontSizeInPixels((request.pixelSize >= 0)? + request.pixelSize:pointsToPixels(request.pointSize)) + , m_scaledFont(0) + , m_scaledFontSizeInPixels(0) + , m_activeFont(0) +{ + QFontEngine::fontDef = request; + setFontScale(1.0); + cache_cost = sizeof(QFontEngineS60); +} + +QFontEngineS60::~QFontEngineS60() +{ + releaseFont(m_originalFont); + releaseFont(m_scaledFont); +} + +QFixed QFontEngineS60::emSquareSize() const +{ + const QFixed unitsPerEm = m_extras->unitsPerEm(); + return unitsPerEm.toInt() == -1 ? + QFixed::fromReal(m_originalFontSizeInPixels) : unitsPerEm; +} + +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_extras->cmap(); + const bool isRtl = (flags & QTextEngine::RightToLeft); + for (int i = 0; i < len; ++i) { + const unsigned int uc = getChar(characters, i, len); + *g++ = QFontEngine::getTrueTypeGlyphIndex(cmap, + (isRtl && !m_extras->isSymbolCMap()) ? QChar::mirroredChar(uc) : 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); + TOpenFontCharMetrics metrics; + const TUint8 *glyphBitmapBytes; + TSize glyphBitmapSize; + for (int i = 0; i < glyphs->numGlyphs; i++) { + getCharacterData(glyphs->glyphs[i], metrics, glyphBitmapBytes, glyphBitmapSize); + glyphs->advances_x[i] = metrics.HorizAdvance(); + glyphs->advances_y[i] = 0; + } +} + +#ifdef Q_SYMBIAN_HAS_GLYPHOUTLINE_API +static bool parseGlyphPathData(const char *dataStr, const char *dataEnd, QPainterPath &path, + qreal fontPixelSize, const QPointF &offset, bool hinted); +#endif //Q_SYMBIAN_HAS_GLYPHOUTLINE_API + +void QFontEngineS60::addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, + int nglyphs, QPainterPath *path, + QTextItem::RenderFlags flags) +{ +#ifdef Q_SYMBIAN_HAS_GLYPHOUTLINE_API + Q_UNUSED(flags) + RGlyphOutlineIterator iterator; + const TInt error = iterator.Open(*m_activeFont, glyphs, nglyphs); + if (KErrNone != error) + return; + const qreal fontSizeInPixels = qreal(m_activeFont->HeightInPixels()); + int count = 0; + do { + const TUint8* outlineUint8 = iterator.Outline(); + const char* const outlineChar = reinterpret_cast<const char*>(outlineUint8); + const char* const outlineEnd = outlineChar + iterator.OutlineLength(); + parseGlyphPathData(outlineChar, outlineEnd, *path, fontSizeInPixels, + positions[count++].toPointF(), false); + } while(KErrNone == iterator.Next() && count <= nglyphs); + iterator.Close(); +#else // Q_SYMBIAN_HAS_GLYPHOUTLINE_API + QFontEngine::addGlyphsToPath(glyphs, positions, nglyphs, path, flags); +#endif //Q_SYMBIAN_HAS_GLYPHOUTLINE_API +} + +QImage QFontEngineS60::alphaMapForGlyph(glyph_t glyph) +{ + // Note: On some Symbian versions (apparently <= Symbian^1), this + // function will return gray values 0x00, 0x10 ... 0xe0, 0xf0 due + // to a bug. The glyphs are nowhere perfectly opaque. + // This has been fixed for Symbian^3. + + 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()); + 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 - lastRightBearing(glyphs), 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); + const glyph_metrics_t result( + metrics.HorizBearingX(), + -metrics.HorizBearingY(), + metrics.Width(), + metrics.Height(), + metrics.HorizAdvance(), + 0 + ); + return result; +} + +glyph_metrics_t QFontEngineS60::boundingBox(glyph_t glyph) +{ + return boundingBox_const(glyph); +} + +QFixed QFontEngineS60::ascent() const +{ + // Workaround for QTBUG-8013 + // Stroke based fonts may return an incorrect FontMaxAscent of 0. + const QFixed ascent = m_originalFont->FontMaxAscent(); + return (ascent > 0) ? ascent : QFixed::fromReal(m_originalFontSizeInPixels) - descent(); +} + +QFixed QFontEngineS60::descent() const +{ + return m_originalFont->FontMaxDescent(); +} + +QFixed QFontEngineS60::leading() const +{ + return 0; +} + +qreal QFontEngineS60::maxCharWidth() const +{ + return m_originalFont->MaxCharWidthInPixels(); +} + +const char *QFontEngineS60::name() const +{ + return "QFontEngineS60"; +} + +bool QFontEngineS60::canRender(const QChar *string, int len) +{ + const unsigned char *cmap = m_extras->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_extras->getSfntTable(tag); +} + +bool QFontEngineS60::getSfntTableData(uint tag, uchar *buffer, uint *length) const +{ + return m_extras->getSfntTableData(tag, buffer, length); +} + +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_activeFont->GetCharacterData(specialCode, metrics, bitmap, bitmapSize); + const glyph_t fallbackGlyph = '?'; + if (availability != CFont::EAllCharacterData) { + const CFont::TCharacterDataAvailability fallbackAvailability = + m_activeFont->GetCharacterData(fallbackGlyph, metrics, bitmap, bitmapSize); + Q_ASSERT(fallbackAvailability == CFont::EAllCharacterData); + } +} + +#ifdef Q_SYMBIAN_HAS_GLYPHOUTLINE_API +static inline void skipSpacesAndComma(const char* &str, const char* const strEnd) +{ + while (str <= strEnd && (*str == ' ' || *str == ',')) + ++str; +} + +static bool parseGlyphPathData(const char *svgPath, const char *svgPathEnd, QPainterPath &path, + qreal fontPixelSize, const QPointF &offset, bool hinted) +{ + Q_UNUSED(hinted) + QPointF p1, p2, firstSubPathPoint; + qreal *elementValues[] = + {&p1.rx(), &p1.ry(), &p2.rx(), &p2.ry()}; + const int unitsPerEm = 2048; // See: http://en.wikipedia.org/wiki/Em_%28typography%29 + const qreal resizeFactor = fontPixelSize / unitsPerEm; + + while (svgPath < svgPathEnd) { + skipSpacesAndComma(svgPath, svgPathEnd); + const char pathElem = *svgPath++; + skipSpacesAndComma(svgPath, svgPathEnd); + + if (pathElem != 'Z') { + char *endStr = 0; + int elementValuesCount = 0; + for (int i = 0; i < 4; ++i) { // 4 = size of elementValues[] + qreal coordinateValue = strtod(svgPath, &endStr); + if (svgPath == endStr) + break; + if (i % 2) // Flip vertically + coordinateValue = -coordinateValue; + *elementValues[i] = coordinateValue * resizeFactor; + elementValuesCount++; + svgPath = endStr; + skipSpacesAndComma(svgPath, svgPathEnd); + } + p1 += offset; + if (elementValuesCount == 2) + p2 = firstSubPathPoint; + else + p2 += offset; + } + + switch (pathElem) { + case 'M': + firstSubPathPoint = p1; + path.moveTo(p1); + break; + case 'Z': + path.closeSubpath(); + break; + case 'L': + path.lineTo(p1); + break; + case 'Q': + path.quadTo(p1, p2); + break; + default: + return false; + } + } + return true; +} +#endif // Q_SYMBIAN_HAS_GLYPHOUTLINE_API + +QT_END_NAMESPACE |