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|
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qfontengine_qpf_p.h"
#include "private/qpaintengine_raster_p.h"
#include <QtCore/qlibraryinfo.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qfile.h>
#include <QtCore/qdir.h>
#include <QtCore/qbuffer.h>
#if !defined(QT_NO_FREETYPE)
#include "private/qfontengine_ft_p.h"
#endif
#include "private/qcore_unix_p.h" // overrides QT_OPEN
// for mmap
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <errno.h>
QT_BEGIN_NAMESPACE
#ifndef QT_NO_QWS_QPF2
#include "qpfutil.cpp"
QT_BEGIN_INCLUDE_NAMESPACE
#if defined(Q_WS_QWS)
# include "private/qwscommand_qws_p.h"
# include "qwsdisplay_qws.h"
# include "qabstractfontengine_p.h"
#endif
#include "qplatformdefs.h"
QT_END_INCLUDE_NAMESPACE
//#define DEBUG_HEADER
//#define DEBUG_FONTENGINE
#if defined(DEBUG_HEADER)
# define DEBUG_VERIFY qDebug
#else
# define DEBUG_VERIFY if (0) qDebug
#endif
#define READ_VERIFY(type, variable) \
if (tagPtr + sizeof(type) > endPtr) { \
DEBUG_VERIFY() << "read verify failed in line" << __LINE__; \
return 0; \
} \
variable = qFromBigEndian<type>(tagPtr); \
DEBUG_VERIFY() << "read value" << variable << "of type " #type; \
tagPtr += sizeof(type)
template <typename T>
T readValue(const uchar *&data)
{
T value = qFromBigEndian<T>(data);
data += sizeof(T);
return value;
}
#define VERIFY(condition) \
if (!(condition)) { \
DEBUG_VERIFY() << "condition " #condition " failed in line" << __LINE__; \
return 0; \
}
#define VERIFY_TAG(condition) \
if (!(condition)) { \
DEBUG_VERIFY() << "verifying tag condition " #condition " failed in line" << __LINE__ << "with tag" << tag; \
return 0; \
}
static inline const uchar *verifyTag(const uchar *tagPtr, const uchar *endPtr)
{
quint16 tag, length;
READ_VERIFY(quint16, tag);
READ_VERIFY(quint16, length);
if (tag == QFontEngineQPF::Tag_EndOfHeader)
return endPtr;
if (tag < QFontEngineQPF::NumTags) {
switch (tagTypes[tag]) {
case QFontEngineQPF::BitFieldType:
case QFontEngineQPF::StringType:
// can't do anything...
break;
case QFontEngineQPF::UInt32Type:
VERIFY_TAG(length == sizeof(quint32));
break;
case QFontEngineQPF::FixedType:
VERIFY_TAG(length == sizeof(quint32));
break;
case QFontEngineQPF::UInt8Type:
VERIFY_TAG(length == sizeof(quint8));
break;
}
#if defined(DEBUG_HEADER)
if (length == 1)
qDebug() << "tag data" << hex << *tagPtr;
else if (length == 4)
qDebug() << "tag data" << hex << tagPtr[0] << tagPtr[1] << tagPtr[2] << tagPtr[3];
#endif
}
return tagPtr + length;
}
const QFontEngineQPF::Glyph *QFontEngineQPF::findGlyph(glyph_t g) const
{
if (!g || g >= glyphMapEntries)
return 0;
const quint32 *gmapPtr = reinterpret_cast<const quint32 *>(fontData + glyphMapOffset);
quint32 glyphPos = qFromBigEndian<quint32>(gmapPtr[g]);
if (glyphPos > glyphDataSize) {
if (glyphPos == 0xffffffff)
return 0;
#if defined(DEBUG_FONTENGINE)
qDebug() << "glyph" << g << "outside of glyphData, remapping font file";
#endif
#if !defined(QT_NO_FREETYPE) && !defined(QT_FONTS_ARE_RESOURCES)
const_cast<QFontEngineQPF *>(this)->remapFontData();
#endif
if (glyphPos > glyphDataSize)
return 0;
}
return reinterpret_cast<const Glyph *>(fontData + glyphDataOffset + glyphPos);
}
bool QFontEngineQPF::verifyHeader(const uchar *data, int size)
{
VERIFY(size >= int(sizeof(Header)));
const Header *header = reinterpret_cast<const Header *>(data);
if (header->magic[0] != 'Q'
|| header->magic[1] != 'P'
|| header->magic[2] != 'F'
|| header->magic[3] != '2')
return false;
VERIFY(header->majorVersion <= CurrentMajorVersion);
const quint16 dataSize = qFromBigEndian<quint16>(header->dataSize);
VERIFY(size >= int(sizeof(Header)) + dataSize);
const uchar *tagPtr = data + sizeof(Header);
const uchar *tagEndPtr = tagPtr + dataSize;
while (tagPtr < tagEndPtr - 3) {
tagPtr = verifyTag(tagPtr, tagEndPtr);
VERIFY(tagPtr);
}
VERIFY(tagPtr <= tagEndPtr);
return true;
}
QVariant QFontEngineQPF::extractHeaderField(const uchar *data, HeaderTag requestedTag)
{
const Header *header = reinterpret_cast<const Header *>(data);
const uchar *tagPtr = data + sizeof(Header);
const uchar *endPtr = tagPtr + qFromBigEndian<quint16>(header->dataSize);
while (tagPtr < endPtr - 3) {
quint16 tag = readValue<quint16>(tagPtr);
quint16 length = readValue<quint16>(tagPtr);
if (tag == requestedTag) {
switch (tagTypes[requestedTag]) {
case StringType:
return QVariant(QString::fromUtf8(reinterpret_cast<const char *>(tagPtr), length));
case UInt32Type:
return QVariant(readValue<quint32>(tagPtr));
case UInt8Type:
return QVariant(uint(*tagPtr));
case FixedType:
return QVariant(QFixed::fromFixed(readValue<quint32>(tagPtr)).toReal());
case BitFieldType:
return QVariant(QByteArray(reinterpret_cast<const char *>(tagPtr), length));
}
return QVariant();
} else if (tag == Tag_EndOfHeader) {
break;
}
tagPtr += length;
}
return QVariant();
}
#endif // QT_NO_QWS_QPF2
QString qws_fontCacheDir()
{
QString dir;
#if defined(Q_WS_QWS)
extern QString qws_dataDir();
dir = qws_dataDir();
#else
dir = QDir::tempPath();
#endif
dir.append(QLatin1String("/fonts/"));
QDir qd(dir);
if (!qd.exists() && !qd.mkpath(dir))
dir = QDir::tempPath();
return dir;
}
#ifndef QT_NO_QWS_QPF2
#ifndef QT_FONTS_ARE_RESOURCES
QList<QByteArray> QFontEngineQPF::cleanUpAfterClientCrash(const QList<int> &crashedClientIds)
{
QList<QByteArray> removedFonts;
QDir dir(qws_fontCacheDir(), QLatin1String("*.qsf"));
foreach (const QFileInfo &fi, dir.entryInfoList()) {
const QByteArray fileName = QFile::encodeName(fi.absoluteFilePath());
int fd = QT_OPEN(fileName.constData(), O_RDONLY, 0);
if (fd >= 0) {
void *header = ::mmap(0, sizeof(QFontEngineQPF::Header), PROT_READ, MAP_SHARED, fd, 0);
if (header && header != MAP_FAILED) {
quint32 lockValue = reinterpret_cast<QFontEngineQPF::Header *>(header)->lock;
if (lockValue && crashedClientIds.contains(lockValue)) {
removedFonts.append(fileName);
QFile::remove(QFile::decodeName(fileName));
}
::munmap(header, sizeof(QFontEngineQPF::Header));
}
QT_CLOSE(fd);
}
}
if (!removedFonts.isEmpty())
qDebug() << "list of corrupted and removed fonts:" << removedFonts;
return removedFonts;
}
#endif
static inline unsigned int getChar(const QChar *str, int &i, const int len)
{
uint ucs4 = str[i].unicode();
if (str[i].isHighSurrogate() && i < len-1 && str[i+1].isLowSurrogate()) {
++i;
ucs4 = QChar::surrogateToUcs4(ucs4, str[i].unicode());
}
return ucs4;
}
#ifdef QT_FONTS_ARE_RESOURCES
QFontEngineQPF::QFontEngineQPF(const QFontDef &def, const uchar *bytes, int size)
: fd(-1), fontData(bytes), dataSize(size), renderingFontEngine(0)
#else
QFontEngineQPF::QFontEngineQPF(const QFontDef &def, int fileDescriptor, QFontEngine *fontEngine)
: fd(fileDescriptor), fontData(0), dataSize(0), renderingFontEngine(fontEngine)
#endif
{
fontDef = def;
cache_cost = 100;
freetype = 0;
externalCMap = 0;
cmapOffset = 0;
cmapSize = 0;
glyphMapOffset = 0;
glyphMapEntries = 0;
glyphDataOffset = 0;
glyphDataSize = 0;
if (renderingFontEngine)
glyphFormat = renderingFontEngine->glyphFormat;
kerning_pairs_loaded = false;
readOnly = true;
#if defined(DEBUG_FONTENGINE)
qDebug() << "QFontEngineQPF::QFontEngineQPF( fd =" << fd << ", renderingFontEngine =" << renderingFontEngine << ')';
#endif
#ifndef QT_FONTS_ARE_RESOURCES
if (fd < 0) {
if (!renderingFontEngine)
return;
fileName = fontDef.family.toLower() + QLatin1Char('_')
+ QString::number(fontDef.pixelSize)
+ QLatin1Char('_') + QString::number(fontDef.weight)
+ (fontDef.style != QFont::StyleNormal ?
QLatin1String("_italic") : QLatin1String(""))
+ QLatin1String(".qsf");
fileName.replace(QLatin1Char(' '), QLatin1Char('_'));
fileName.prepend(qws_fontCacheDir());
encodedFileName = QFile::encodeName(fileName);
if (::access(encodedFileName, F_OK) == 0) {
#if defined(DEBUG_FONTENGINE)
qDebug() << "found existing qpf:" << fileName;
#endif
if (::access(encodedFileName, W_OK | R_OK) == 0) {
fd = QT_OPEN(encodedFileName, O_RDWR);
}
// read-write access failed - try read-only access
if (fd == -1 && ::access(encodedFileName, R_OK) == 0) {
fd = QT_OPEN(encodedFileName, O_RDONLY);
if (fd == -1) {
#if defined(DEBUG_FONTENGINE)
qErrnoWarning("QFontEngineQPF: unable to open %s", encodedFileName.constData());
#endif
return;
}
}
if (fd == -1) {
#if defined(DEBUG_FONTENGINE)
qWarning("QFontEngineQPF: insufficient access rights to %s", encodedFileName.constData());
#endif
return;
}
} else {
#if defined(DEBUG_FONTENGINE)
qDebug() << "creating qpf on the fly:" << fileName;
#endif
if (::access(QFile::encodeName(qws_fontCacheDir()), W_OK) == 0) {
fd = QT_OPEN(encodedFileName, O_RDWR | O_EXCL | O_CREAT, 0644);
if (fd == -1) {
#if defined(DEBUG_FONTENGINE)
qErrnoWarning(errno, "QFontEngineQPF: open() failed for %s", encodedFileName.constData());
#endif
return;
}
QBuffer buffer;
buffer.open(QIODevice::ReadWrite);
QPFGenerator generator(&buffer, renderingFontEngine);
generator.generate();
buffer.close();
const QByteArray &data = buffer.data();
if (QT_WRITE(fd, data.constData(), data.size()) == -1) {
#if defined(DEBUG_FONTENGINE)
qErrnoWarning(errno, "QFontEngineQPF: write() failed for %s", encodedFileName.constData());
#endif
return;
}
} else {
#if defined(DEBUG_FONTENGINE)
qErrnoWarning(errno, "QFontEngineQPF: access() failed for %s", qPrintable(qws_fontCacheDir()));
#endif
return;
}
}
}
QT_STATBUF st;
if (QT_FSTAT(fd, &st)) {
#if defined(DEBUG_FONTENGINE)
qErrnoWarning(errno, "QFontEngineQPF: fstat failed!");
#endif
return;
}
dataSize = st.st_size;
fontData = (const uchar *)::mmap(0, st.st_size, PROT_READ | (renderingFontEngine ? PROT_WRITE : 0), MAP_SHARED, fd, 0);
if (!fontData || fontData == (const uchar *)MAP_FAILED) {
#if defined(DEBUG_FONTENGINE)
perror("mmap failed");
#endif
fontData = 0;
return;
}
#endif //QT_FONTS_ARE_RESOURCES
if (!verifyHeader(fontData, dataSize)) {
#if defined(DEBUG_FONTENGINE)
qDebug() << "verifyHeader failed!";
#endif
return;
}
const Header *header = reinterpret_cast<const Header *>(fontData);
readOnly = (header->lock == 0xffffffff);
const uchar *data = fontData + sizeof(Header) + qFromBigEndian<quint16>(header->dataSize);
const uchar *endPtr = fontData + dataSize;
while (data <= endPtr - 8) {
quint16 blockTag = readValue<quint16>(data);
data += 2; // skip padding
quint32 blockSize = readValue<quint32>(data);
if (blockTag == CMapBlock) {
cmapOffset = data - fontData;
cmapSize = blockSize;
} else if (blockTag == GMapBlock) {
glyphMapOffset = data - fontData;
glyphMapEntries = blockSize / 4;
} else if (blockTag == GlyphBlock) {
glyphDataOffset = data - fontData;
glyphDataSize = blockSize;
}
data += blockSize;
}
face_id.filename = QFile::encodeName(extractHeaderField(fontData, Tag_FileName).toString());
face_id.index = extractHeaderField(fontData, Tag_FileIndex).toInt();
#if !defined(QT_NO_FREETYPE) && !defined(QT_FONTS_ARE_RESOURCES)
freetype = QFreetypeFace::getFace(face_id);
if (!freetype) {
QString newPath =
#ifndef QT_NO_SETTINGS
QLibraryInfo::location(QLibraryInfo::LibrariesPath) +
#endif
QLatin1String("/fonts/") +
QFileInfo(QFile::decodeName(face_id.filename)).fileName();
face_id.filename = QFile::encodeName(newPath);
freetype = QFreetypeFace::getFace(face_id);
}
if (freetype) {
const quint32 qpfTtfRevision = extractHeaderField(fontData, Tag_FontRevision).toUInt();
uchar data[4];
uint length = 4;
bool ok = freetype->getSfntTable(MAKE_TAG('h', 'e', 'a', 'd'), data, &length);
if (!ok || length != 4
|| qFromBigEndian<quint32>(data) != qpfTtfRevision) {
freetype->release(face_id);
freetype = 0;
}
}
if (!cmapOffset && freetype) {
freetypeCMapTable = getSfntTable(MAKE_TAG('c', 'm', 'a', 'p'));
externalCMap = reinterpret_cast<const uchar *>(freetypeCMapTable.constData());
cmapSize = freetypeCMapTable.size();
}
#endif
// get the real cmap
if (cmapOffset) {
int tableSize = cmapSize;
const uchar *cmapPtr = getCMap(fontData + cmapOffset, tableSize, &symbol, &cmapSize);
if (cmapPtr)
cmapOffset = cmapPtr - fontData;
else
cmapOffset = 0;
} else if (externalCMap) {
int tableSize = cmapSize;
externalCMap = getCMap(externalCMap, tableSize, &symbol, &cmapSize);
}
// verify all the positions in the glyphMap
if (glyphMapOffset) {
const quint32 *gmapPtr = reinterpret_cast<const quint32 *>(fontData + glyphMapOffset);
for (uint i = 0; i < glyphMapEntries; ++i) {
quint32 glyphDataPos = qFromBigEndian<quint32>(gmapPtr[i]);
if (glyphDataPos == 0xffffffff)
continue;
if (glyphDataPos >= glyphDataSize) {
// error
glyphMapOffset = 0;
glyphMapEntries = 0;
break;
}
}
}
#if defined(DEBUG_FONTENGINE)
if (!isValid())
qDebug() << "fontData" << fontData << "dataSize" << dataSize
<< "externalCMap" << externalCMap << "cmapOffset" << cmapOffset
<< "glyphMapOffset" << glyphMapOffset << "glyphDataOffset" << glyphDataOffset
<< "fd" << fd << "glyphDataSize" << glyphDataSize;
#endif
#if defined(Q_WS_QWS)
if (isValid() && renderingFontEngine)
qt_fbdpy->sendFontCommand(QWSFontCommand::StartedUsingFont, encodedFileName);
#endif
}
QFontEngineQPF::~QFontEngineQPF()
{
#if defined(Q_WS_QWS)
if (isValid() && renderingFontEngine) {
QT_TRY {
qt_fbdpy->sendFontCommand(QWSFontCommand::StoppedUsingFont, encodedFileName);
} QT_CATCH(...) {
qDebug("QFontEngineQPF::~QFontEngineQPF: Out of memory");
// ignore.
}
}
#endif
delete renderingFontEngine;
if (fontData) {
if (munmap((void *)fontData, dataSize) == -1) {
#if defined(DEBUG_FONTENGINE)
qErrnoWarning(errno, "~QFontEngineQPF: Unable to munmap");
#endif
}
}
if (fd != -1)
::close(fd);
#if !defined(QT_NO_FREETYPE)
if (freetype)
freetype->release(face_id);
#endif
}
bool QFontEngineQPF::getSfntTableData(uint tag, uchar *buffer, uint *length) const
{
#if !defined(QT_NO_FREETYPE)
if (freetype)
return freetype->getSfntTable(tag, buffer, length);
#endif
Q_UNUSED(tag);
Q_UNUSED(buffer);
*length = 0;
return false;
}
bool QFontEngineQPF::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const
{
if (!externalCMap && !cmapOffset && renderingFontEngine) {
if (!renderingFontEngine->stringToCMap(str, len, glyphs, nglyphs, flags))
return false;
#ifndef QT_NO_FREETYPE
const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(*glyphs);
#endif
return true;
}
if (*nglyphs < len) {
*nglyphs = len;
return false;
}
#if defined(DEBUG_FONTENGINE)
QSet<QChar> seenGlyphs;
#endif
const uchar *cmap = externalCMap ? externalCMap : (fontData + cmapOffset);
bool mirrored = flags & QTextEngine::RightToLeft;
int glyph_pos = 0;
if (symbol) {
for (int i = 0; i < len; ++i) {
unsigned int uc = getChar(str, i, len);
glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc);
if(!glyphs->glyphs[glyph_pos] && uc < 0x100)
glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc + 0xf000);
++glyph_pos;
}
} else {
for (int i = 0; i < len; ++i) {
unsigned int uc = getChar(str, i, len);
if (mirrored)
uc = QChar::mirroredChar(uc);
glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc);
#if 0 && defined(DEBUG_FONTENGINE)
QChar c(uc);
if (!findGlyph(glyphs[glyph_pos].glyph) && !seenGlyphs.contains(c))
qDebug() << "glyph for character" << c << '/' << hex << uc << "is" << dec << glyphs[glyph_pos].glyph;
seenGlyphs.insert(c);
#endif
++glyph_pos;
}
}
*nglyphs = glyph_pos;
glyphs->numGlyphs = glyph_pos;
recalcAdvances(glyphs, flags);
return true;
}
void QFontEngineQPF::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const
{
#ifndef QT_NO_FREETYPE
const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(*glyphs);
#endif
for (int i = 0; i < glyphs->numGlyphs; ++i) {
const Glyph *g = findGlyph(glyphs->glyphs[i]);
if (!g) {
glyphs->glyphs[i] = 0;
continue;
}
glyphs->advances_x[i] = g->advance;
glyphs->advances_y[i] = 0;
}
}
QImage QFontEngineQPF::alphaMapForGlyph(glyph_t g)
{
const Glyph *glyph = findGlyph(g);
if (!glyph)
return QImage();
const uchar *bits = ((const uchar *) glyph) + sizeof(Glyph);
QImage image(glyph->width, glyph->height, QImage::Format_Indexed8);
for (int j=0; j<256; ++j)
image.setColor(j, qRgba(0, 0, 0, j));
for (int i=0; i<glyph->height; ++i) {
memcpy(image.scanLine(i), bits, glyph->bytesPerLine);
bits += glyph->bytesPerLine;
}
return image;
}
void QFontEngineQPF::draw(QPaintEngine *p, qreal _x, qreal _y, const QTextItemInt &si)
{
QPaintEngineState *pState = p->state;
QRasterPaintEngine *paintEngine = static_cast<QRasterPaintEngine*>(p);
QTransform matrix = pState->transform();
matrix.translate(_x, _y);
QFixed x = QFixed::fromReal(matrix.dx());
QFixed y = QFixed::fromReal(matrix.dy());
QVarLengthArray<QFixedPoint> positions;
QVarLengthArray<glyph_t> glyphs;
getGlyphPositions(si.glyphs, matrix, si.flags, glyphs, positions);
if (glyphs.size() == 0)
return;
for(int i = 0; i < glyphs.size(); i++) {
const Glyph *glyph = findGlyph(glyphs[i]);
if (!glyph)
continue;
const int depth = 8; //###
paintEngine->alphaPenBlt(reinterpret_cast<const uchar *>(glyph) + sizeof(Glyph), glyph->bytesPerLine, depth,
qRound(positions[i].x) + glyph->x,
qRound(positions[i].y) + glyph->y,
glyph->width, glyph->height);
}
}
void QFontEngineQPF::addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags)
{
if (renderingFontEngine &&
(renderingFontEngine->type() != QFontEngine::Proxy
|| static_cast<QProxyFontEngine *>(renderingFontEngine)->capabilities() & QAbstractFontEngine::CanOutlineGlyphs)) {
renderingFontEngine->addOutlineToPath(x, y, glyphs, path, flags);
return;
}
addBitmapFontToPath(x, y, glyphs, path, flags);
}
glyph_metrics_t QFontEngineQPF::boundingBox(const QGlyphLayout &glyphs)
{
#ifndef QT_NO_FREETYPE
const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(glyphs);
#endif
glyph_metrics_t overall;
// initialize with line height, we get the same behaviour on all platforms
overall.y = -ascent();
overall.height = ascent() + descent() + 1;
QFixed ymax = 0;
QFixed xmax = 0;
for (int i = 0; i < glyphs.numGlyphs; i++) {
const Glyph *g = findGlyph(glyphs.glyphs[i]);
if (!g)
continue;
QFixed x = overall.xoff + glyphs.offsets[i].x + g->x;
QFixed y = overall.yoff + glyphs.offsets[i].y + g->y;
overall.x = qMin(overall.x, x);
overall.y = qMin(overall.y, y);
xmax = qMax(xmax, x + g->width);
ymax = qMax(ymax, y + g->height);
overall.xoff += g->advance;
}
overall.height = qMax(overall.height, ymax - overall.y);
overall.width = xmax - overall.x;
return overall;
}
glyph_metrics_t QFontEngineQPF::boundingBox(glyph_t glyph)
{
#ifndef QT_NO_FREETYPE
{
QGlyphLayoutArray<1> tmp;
tmp.glyphs[0] = glyph;
const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(tmp);
}
#endif
glyph_metrics_t overall;
const Glyph *g = findGlyph(glyph);
if (!g)
return overall;
overall.x = g->x;
overall.y = g->y;
overall.width = g->width;
overall.height = g->height;
overall.xoff = g->advance;
return overall;
}
QFixed QFontEngineQPF::ascent() const
{
return QFixed::fromReal(extractHeaderField(fontData, Tag_Ascent).value<qreal>());
}
QFixed QFontEngineQPF::descent() const
{
return QFixed::fromReal(extractHeaderField(fontData, Tag_Descent).value<qreal>());
}
QFixed QFontEngineQPF::leading() const
{
return QFixed::fromReal(extractHeaderField(fontData, Tag_Leading).value<qreal>());
}
qreal QFontEngineQPF::maxCharWidth() const
{
return extractHeaderField(fontData, Tag_MaxCharWidth).value<qreal>();
}
qreal QFontEngineQPF::minLeftBearing() const
{
return extractHeaderField(fontData, Tag_MinLeftBearing).value<qreal>();
}
qreal QFontEngineQPF::minRightBearing() const
{
return extractHeaderField(fontData, Tag_MinRightBearing).value<qreal>();
}
QFixed QFontEngineQPF::underlinePosition() const
{
return QFixed::fromReal(extractHeaderField(fontData, Tag_UnderlinePosition).value<qreal>());
}
QFixed QFontEngineQPF::lineThickness() const
{
return QFixed::fromReal(extractHeaderField(fontData, Tag_LineThickness).value<qreal>());
}
QFontEngine::Type QFontEngineQPF::type() const
{
return QFontEngine::QPF2;
}
bool QFontEngineQPF::canRender(const QChar *string, int len)
{
const uchar *cmap = externalCMap ? externalCMap : (fontData + cmapOffset);
if (symbol) {
for (int i = 0; i < len; ++i) {
unsigned int uc = getChar(string, i, len);
glyph_t g = getTrueTypeGlyphIndex(cmap, uc);
if(!g && uc < 0x100)
g = getTrueTypeGlyphIndex(cmap, uc + 0xf000);
if (!g)
return false;
}
} else {
for (int i = 0; i < len; ++i) {
unsigned int uc = getChar(string, i, len);
if (!getTrueTypeGlyphIndex(cmap, uc))
return false;
}
}
return true;
}
bool QFontEngineQPF::isValid() const
{
return fontData && dataSize && (cmapOffset || externalCMap || renderingFontEngine)
&& glyphMapOffset && glyphDataOffset && (fd >= 0 || glyphDataSize > 0);
}
#if !defined(QT_NO_FREETYPE)
FT_Face QFontEngineQPF::lockFace() const
{
Q_ASSERT(freetype);
freetype->lock();
FT_Face face = freetype->face;
// ### not perfect
const int ysize = qRound(fontDef.pixelSize * qreal(64));
const int xsize = ysize;
if (freetype->xsize != xsize || freetype->ysize != ysize) {
FT_Set_Char_Size(face, xsize, ysize, 0, 0);
freetype->xsize = xsize;
freetype->ysize = ysize;
}
FT_Matrix identityMatrix;
identityMatrix.xx = 0x10000;
identityMatrix.yy = 0x10000;
identityMatrix.xy = 0;
identityMatrix.yx = 0;
if (freetype->matrix.xx != identityMatrix.xx ||
freetype->matrix.yy != identityMatrix.yy ||
freetype->matrix.xy != identityMatrix.xy ||
freetype->matrix.yx != identityMatrix.yx) {
freetype->matrix = identityMatrix;
FT_Set_Transform(face, &freetype->matrix, 0);
}
return face;
}
void QFontEngineQPF::unlockFace() const
{
freetype->unlock();
}
void QFontEngineQPF::doKerning(QGlyphLayout *g, QTextEngine::ShaperFlags flags) const
{
if (!kerning_pairs_loaded) {
kerning_pairs_loaded = true;
if (freetype) {
lockFace();
if (freetype->face->size->metrics.x_ppem != 0) {
QFixed scalingFactor(freetype->face->units_per_EM/freetype->face->size->metrics.x_ppem);
unlockFace();
const_cast<QFontEngineQPF *>(this)->loadKerningPairs(scalingFactor);
} else {
unlockFace();
}
}
}
QFontEngine::doKerning(g, flags);
}
HB_Error QFontEngineQPF::getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints)
{
if (!freetype)
return HB_Err_Not_Covered;
lockFace();
HB_Error result = freetype->getPointInOutline(glyph, flags, point, xpos, ypos, nPoints);
unlockFace();
return result;
}
QFixed QFontEngineQPF::emSquareSize() const
{
if (!freetype)
return QFontEngine::emSquareSize();
if (FT_IS_SCALABLE(freetype->face))
return freetype->face->units_per_EM;
else
return freetype->face->size->metrics.y_ppem;
}
void QFontEngineQPF::ensureGlyphsLoaded(const QGlyphLayout &glyphs)
{
if (readOnly)
return;
bool locked = false;
for (int i = 0; i < glyphs.numGlyphs; ++i) {
if (!glyphs.glyphs[i])
continue;
const Glyph *g = findGlyph(glyphs.glyphs[i]);
if (g)
continue;
if (!locked) {
if (!lockFile())
return;
locked = true;
g = findGlyph(glyphs.glyphs[i]);
if (g)
continue;
}
loadGlyph(glyphs.glyphs[i]);
}
if (locked) {
unlockFile();
#if defined(DEBUG_FONTENGINE)
qDebug() << "Finished rendering glyphs\n";
#endif
}
}
void QFontEngineQPF::loadGlyph(glyph_t glyph)
{
quint32 glyphPos = ~0;
if (!renderingFontEngine)
return;
QImage img = renderingFontEngine->alphaMapForGlyph(glyph);
if (img.format() != QImage::Format_Indexed8) {
bool mono = img.depth() == 1;
img = img.convertToFormat(QImage::Format_Indexed8);
if (mono) {
//### we know that 1 is opaque and 0 is transparent
uchar *byte = img.bits();
int count = img.byteCount();
while (count--)
*byte++ *= 0xff;
}
}
glyph_metrics_t metrics = renderingFontEngine->boundingBox(glyph);
renderingFontEngine->removeGlyphFromCache(glyph);
off_t oldSize = ::lseek(fd, 0, SEEK_END);
if (oldSize == (off_t)-1)
return;
Glyph g;
g.width = img.width();
g.height = img.height();
g.bytesPerLine = img.bytesPerLine();
g.x = qRound(metrics.x);
g.y = qRound(metrics.y);
g.advance = qRound(metrics.xoff);
QT_WRITE(fd, &g, sizeof(g));
QT_WRITE(fd, img.bits(), img.byteCount());
glyphPos = oldSize - glyphDataOffset;
#if 0 && defined(DEBUG_FONTENGINE)
qDebug() << "glyphPos for new glyph" << glyph << "is" << glyphPos << "oldSize" << oldSize << "glyphDataOffset" << glyphDataOffset;
#endif
quint32 *gmap = (quint32 *)(fontData + glyphMapOffset);
gmap[glyph] = qToBigEndian(glyphPos);
glyphDataSize = glyphPos + sizeof(g) + img.byteCount();
quint32 *blockSizePtr = (quint32 *)(fontData + glyphDataOffset - 4);
*blockSizePtr = qToBigEndian(glyphDataSize);
}
bool QFontEngineQPF::lockFile()
{
// #### this does not handle the case when the process holding the
// lock hangs for some reason
struct flock lock;
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0; // lock the whole file
while (fcntl(fd, F_SETLKW, &lock) != 0) {
if (errno == EINTR)
continue;
perror("locking qpf");
return false;
}
Header *header = (Header *)fontData;
if (header->lock) {
lock.l_type = F_UNLCK;
if (fcntl(fd, F_SETLK, &lock) != 0)
perror("unlocking possibly corrupt qpf");
return false;
}
#if defined(Q_WS_QWS)
extern int qws_client_id;
// qws_client_id == 0 means we're the server. in this case we just
// set the id to 1
header->lock = qws_client_id ? qws_client_id : 1;
#else
header->lock = 1;
#endif
return true;
}
void QFontEngineQPF::unlockFile()
{
((Header *)fontData)->lock = 0;
struct flock lock;
lock.l_type = F_UNLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0; // lock the whole file
if (fcntl(fd, F_SETLK, &lock) != 0) {
perror("unlocking qpf");
}
remapFontData();
}
void QFontEngineQPF::remapFontData()
{
off_t newFileSize = ::lseek(fd, 0, SEEK_END);
if (newFileSize == (off_t)-1) {
#ifdef DEBUG_FONTENGINE
perror("QFontEngineQPF::remapFontData: lseek failed");
#endif
fontData = 0;
return;
}
#ifndef QT_NO_MREMAP
fontData = static_cast<uchar *>(::mremap(const_cast<uchar *>(fontData), dataSize, newFileSize, MREMAP_MAYMOVE));
if (!fontData || fontData == (const uchar *)MAP_FAILED) {
# if defined(DEBUG_FONTENGINE)
perror("QFontEngineQPF::remapFontData(): mremap failed");
# endif
fontData = 0;
}
if (!fontData)
#endif // QT_NO_MREMAP
{
int status = ::munmap((void *)fontData, dataSize);
if (status != 0)
qErrnoWarning(status, "QFontEngineQPF::remapFomrData: munmap failed!");
fontData = (const uchar *)::mmap(0, newFileSize, PROT_READ | (renderingFontEngine ? PROT_WRITE : 0),
MAP_SHARED, fd, 0);
if (!fontData || fontData == (const uchar *)MAP_FAILED) {
# if defined(DEBUG_FONTENGINE)
perror("mmap failed");
# endif
fontData = 0;
return;
}
}
dataSize = newFileSize;
glyphDataSize = newFileSize - glyphDataOffset;
#if defined(DEBUG_FONTENGINE)
qDebug() << "remapped the font file to" << newFileSize << "bytes";
#endif
}
#endif // QT_NO_FREETYPE
void QPFGenerator::generate()
{
writeHeader();
writeGMap();
writeBlock(QFontEngineQPF::GlyphBlock, QByteArray());
dev->seek(4); // position of header.lock
writeUInt32(0);
}
void QPFGenerator::writeHeader()
{
QFontEngineQPF::Header header;
header.magic[0] = 'Q';
header.magic[1] = 'P';
header.magic[2] = 'F';
header.magic[3] = '2';
header.lock = 1;
header.majorVersion = QFontEngineQPF::CurrentMajorVersion;
header.minorVersion = QFontEngineQPF::CurrentMinorVersion;
header.dataSize = 0;
dev->write((const char *)&header, sizeof(header));
writeTaggedString(QFontEngineQPF::Tag_FontName, fe->fontDef.family.toUtf8());
QFontEngine::FaceId face = fe->faceId();
writeTaggedString(QFontEngineQPF::Tag_FileName, face.filename);
writeTaggedUInt32(QFontEngineQPF::Tag_FileIndex, face.index);
{
uchar data[4];
uint len = 4;
bool ok = fe->getSfntTableData(MAKE_TAG('h', 'e', 'a', 'd'), data, &len);
if (ok) {
const quint32 revision = qFromBigEndian<quint32>(data);
writeTaggedUInt32(QFontEngineQPF::Tag_FontRevision, revision);
}
}
writeTaggedQFixed(QFontEngineQPF::Tag_Ascent, fe->ascent());
writeTaggedQFixed(QFontEngineQPF::Tag_Descent, fe->descent());
writeTaggedQFixed(QFontEngineQPF::Tag_Leading, fe->leading());
writeTaggedQFixed(QFontEngineQPF::Tag_XHeight, fe->xHeight());
writeTaggedQFixed(QFontEngineQPF::Tag_AverageCharWidth, fe->averageCharWidth());
writeTaggedQFixed(QFontEngineQPF::Tag_MaxCharWidth, QFixed::fromReal(fe->maxCharWidth()));
writeTaggedQFixed(QFontEngineQPF::Tag_LineThickness, fe->lineThickness());
writeTaggedQFixed(QFontEngineQPF::Tag_MinLeftBearing, QFixed::fromReal(fe->minLeftBearing()));
writeTaggedQFixed(QFontEngineQPF::Tag_MinRightBearing, QFixed::fromReal(fe->minRightBearing()));
writeTaggedQFixed(QFontEngineQPF::Tag_UnderlinePosition, fe->underlinePosition());
writeTaggedUInt8(QFontEngineQPF::Tag_PixelSize, fe->fontDef.pixelSize);
writeTaggedUInt8(QFontEngineQPF::Tag_Weight, fe->fontDef.weight);
writeTaggedUInt8(QFontEngineQPF::Tag_Style, fe->fontDef.style);
writeTaggedUInt8(QFontEngineQPF::Tag_GlyphFormat, QFontEngineQPF::AlphamapGlyphs);
writeTaggedString(QFontEngineQPF::Tag_EndOfHeader, QByteArray());
align4();
const quint64 size = dev->pos();
header.dataSize = qToBigEndian<quint16>(size - sizeof(header));
dev->seek(0);
dev->write((const char *)&header, sizeof(header));
dev->seek(size);
}
void QPFGenerator::writeGMap()
{
const quint16 glyphCount = fe->glyphCount();
writeUInt16(QFontEngineQPF::GMapBlock);
writeUInt16(0); // padding
writeUInt32(glyphCount * 4);
QByteArray &buffer = dev->buffer();
const int numBytes = glyphCount * sizeof(quint32);
qint64 pos = buffer.size();
buffer.resize(pos + numBytes);
qMemSet(buffer.data() + pos, 0xff, numBytes);
dev->seek(pos + numBytes);
}
void QPFGenerator::writeBlock(QFontEngineQPF::BlockTag tag, const QByteArray &data)
{
writeUInt16(tag);
writeUInt16(0); // padding
const int padSize = ((data.size() + 3) / 4) * 4 - data.size();
writeUInt32(data.size() + padSize);
dev->write(data);
for (int i = 0; i < padSize; ++i)
writeUInt8(0);
}
void QPFGenerator::writeTaggedString(QFontEngineQPF::HeaderTag tag, const QByteArray &string)
{
writeUInt16(tag);
writeUInt16(string.length());
dev->write(string);
}
void QPFGenerator::writeTaggedUInt32(QFontEngineQPF::HeaderTag tag, quint32 value)
{
writeUInt16(tag);
writeUInt16(sizeof(value));
writeUInt32(value);
}
void QPFGenerator::writeTaggedUInt8(QFontEngineQPF::HeaderTag tag, quint8 value)
{
writeUInt16(tag);
writeUInt16(sizeof(value));
writeUInt8(value);
}
void QPFGenerator::writeTaggedQFixed(QFontEngineQPF::HeaderTag tag, QFixed value)
{
writeUInt16(tag);
writeUInt16(sizeof(quint32));
writeUInt32(value.value());
}
#endif // QT_NO_QWS_QPF2
/*
Creates a new multi qws engine.
This function takes ownership of the QFontEngine, increasing it's refcount.
*/
QFontEngineMultiQWS::QFontEngineMultiQWS(QFontEngine *fe, int _script, const QStringList &fallbacks)
: QFontEngineMulti(fallbacks.size() + 1),
fallbackFamilies(fallbacks), script(_script)
{
engines[0] = fe;
fe->ref.ref();
fontDef = engines[0]->fontDef;
}
void QFontEngineMultiQWS::loadEngine(int at)
{
Q_ASSERT(at < engines.size());
Q_ASSERT(engines.at(at) == 0);
QFontDef request = fontDef;
request.styleStrategy |= QFont::NoFontMerging;
request.family = fallbackFamilies.at(at-1);
engines[at] = QFontDatabase::findFont(script,
/*fontprivate*/0,
request);
Q_ASSERT(engines[at]);
engines[at]->ref.ref();
engines[at]->fontDef = request;
}
void QFontEngineMultiQWS::draw(QPaintEngine */*p*/, qreal /*x*/, qreal /*y*/, const QTextItemInt &/*si*/)
{
qFatal("QFontEngineMultiQWS::draw should never be called!");
}
QT_END_NAMESPACE
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