mirror of
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566 lines
15 KiB
C++
566 lines
15 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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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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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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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 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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_p.h"
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#include <qwsdisplay_qws.h>
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#include <qvarlengtharray.h>
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#include <qpainter_p.h>
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#include <qpaintengine_raster_p.h>
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#include <qpdf_p.h>
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#include "qtextengine_p.h"
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#include "qcore_unix_p.h" // overrides QT_OPEN
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#include <qdebug.h>
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#ifndef QT_NO_QWS_QPF
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#include "qplatformdefs.h"
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#include "qfile.h"
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#include <stdlib.h>
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#if !defined(Q_OS_INTEGRITY)
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#define QT_USE_MMAP
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#endif
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#ifdef QT_USE_MMAP
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// for mmap
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <errno.h>
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#ifndef MAP_FILE
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# define MAP_FILE 0
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#endif
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#ifndef MAP_FAILED
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# define MAP_FAILED (void *)-1
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#endif
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#endif // QT_USE_MMAP
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QT_BEGIN_NAMESPACE
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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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uint ucs4 = str[i].unicode();
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if (str[i].isHighSurrogate() && i < len-1 && str[i+1].isLowSurrogate()) {
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++i;
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ucs4 = QChar::surrogateToUcs4(ucs4, str[i].unicode());
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}
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return ucs4;
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}
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#define FM_SMOOTH 1
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class Q_PACKED QPFGlyphMetrics {
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public:
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quint8 linestep;
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quint8 width;
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quint8 height;
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quint8 flags;
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qint8 bearingx; // Difference from pen position to glyph's left bbox
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quint8 advance; // Difference between pen positions
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qint8 bearingy; // Used for putting characters on baseline
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qint8 reserved; // Do not use
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// Flags:
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// RendererOwnsData - the renderer is responsible for glyph data
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// memory deletion otherwise QPFGlyphTree must
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// delete [] the data when the glyph is deleted.
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enum Flags { RendererOwnsData=0x01 };
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};
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class QPFGlyph {
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public:
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QPFGlyph() { metrics=0; data=0; }
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QPFGlyph(QPFGlyphMetrics* m, uchar* d) :
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metrics(m), data(d) { }
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~QPFGlyph() {}
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QPFGlyphMetrics* metrics;
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uchar* data;
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};
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struct Q_PACKED QPFFontMetrics{
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qint8 ascent,descent;
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qint8 leftbearing,rightbearing;
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quint8 maxwidth;
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qint8 leading;
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quint8 flags;
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quint8 underlinepos;
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quint8 underlinewidth;
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quint8 reserved3;
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};
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class QPFGlyphTree {
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public:
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/* reads in a tree like this:
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A-Z
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/ \
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0-9 a-z
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etc.
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*/
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glyph_t min,max;
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QPFGlyphTree* less;
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QPFGlyphTree* more;
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QPFGlyph* glyph;
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public:
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QPFGlyphTree(uchar*& data)
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{
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read(data);
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}
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~QPFGlyphTree()
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{
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// NOTE: does not delete glyph[*].metrics or .data.
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// the caller does this (only they know who owns
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// the data). See clear().
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delete less;
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delete more;
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delete [] glyph;
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}
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bool inFont(glyph_t g) const
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{
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if ( g < min ) {
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if ( !less )
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return false;
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return less->inFont(g);
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} else if ( g > max ) {
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if ( !more )
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return false;
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return more->inFont(g);
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}
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return true;
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}
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QPFGlyph* get(glyph_t g)
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{
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if ( g < min ) {
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if ( !less )
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return 0;
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return less->get(g);
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} else if ( g > max ) {
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if ( !more )
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return 0;
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return more->get(g);
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}
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return &glyph[g - min];
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}
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int totalChars() const
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{
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if ( !this ) return 0;
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return max-min+1 + less->totalChars() + more->totalChars();
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}
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int weight() const
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{
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if ( !this ) return 0;
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return 1 + less->weight() + more->weight();
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}
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void dump(int indent=0)
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{
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for (int i=0; i<indent; i++) printf(" ");
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printf("%d..%d",min,max);
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//if ( indent == 0 )
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printf(" (total %d)",totalChars());
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printf("\n");
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if ( less ) less->dump(indent+1);
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if ( more ) more->dump(indent+1);
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}
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private:
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QPFGlyphTree()
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{
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}
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void read(uchar*& data)
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{
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// All node data first
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readNode(data);
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// Then all non-video data
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readMetrics(data);
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// Then all video data
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readData(data);
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}
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void readNode(uchar*& data)
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{
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uchar rw = *data++;
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uchar cl = *data++;
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min = (rw << 8) | cl;
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rw = *data++;
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cl = *data++;
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max = (rw << 8) | cl;
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int flags = *data++;
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if ( flags & 1 )
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less = new QPFGlyphTree;
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else
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less = 0;
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if ( flags & 2 )
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more = new QPFGlyphTree;
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else
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more = 0;
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int n = max-min+1;
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glyph = new QPFGlyph[n];
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if ( less )
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less->readNode(data);
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if ( more )
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more->readNode(data);
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}
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void readMetrics(uchar*& data)
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{
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int n = max-min+1;
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for (int i=0; i<n; i++) {
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glyph[i].metrics = (QPFGlyphMetrics*)data;
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data += sizeof(QPFGlyphMetrics);
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}
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if ( less )
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less->readMetrics(data);
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if ( more )
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more->readMetrics(data);
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}
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void readData(uchar*& data)
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{
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int n = max-min+1;
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for (int i=0; i<n; i++) {
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QSize s( glyph[i].metrics->width, glyph[i].metrics->height );
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//######### s = qt_screen->mapToDevice( s );
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uint datasize = glyph[i].metrics->linestep * s.height();
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glyph[i].data = data; data += datasize;
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}
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if ( less )
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less->readData(data);
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if ( more )
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more->readData(data);
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}
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};
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class QFontEngineQPF1Data
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{
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public:
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QPFFontMetrics fm;
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QPFGlyphTree *tree;
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uchar *mmapStart;
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size_t mmapLength;
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#ifdef QT_USE_MMAP
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bool used_mmap;
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#endif
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};
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QFontEngineQPF1::QFontEngineQPF1(const QFontDef&, const QString &fn)
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{
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cache_cost = 1;
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int fd = QT_OPEN(QFile::encodeName(fn).constData(), O_RDONLY, 0);
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if (fd == -1)
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qFatal("Failed to open '%s'", QFile::encodeName(fn).constData());
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QT_STATBUF st;
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if (QT_FSTAT(fd, &st) != 0)
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qFatal("Failed to stat '%s'", QFile::encodeName(fn).constData());
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d = new QFontEngineQPF1Data;
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d->mmapStart = 0;
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d->mmapLength = st.st_size;
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#ifdef QT_USE_MMAP
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d->used_mmap = true;
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d->mmapStart = (uchar *)::mmap(0, st.st_size, // any address, whole file
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PROT_READ, // read-only memory
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MAP_FILE | MAP_PRIVATE, // swap-backed map from file
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fd, 0); // from offset 0 of fd
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if (d->mmapStart == (uchar *)MAP_FAILED)
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d->mmapStart = 0;
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#endif
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if (!d->mmapStart) {
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#ifdef QT_USE_MMAP
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d->used_mmap = false;
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#endif
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d->mmapStart = new uchar[d->mmapLength];
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if (QT_READ(fd, d->mmapStart, d->mmapLength) != (qint64)d->mmapLength)
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qFatal("Failed to read '%s'", QFile::encodeName(fn).constData());
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}
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QT_CLOSE(fd);
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if (d->mmapStart) {
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uchar* data = d->mmapStart;
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memcpy(reinterpret_cast<char*>(&d->fm), data, sizeof(d->fm));
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data += sizeof(d->fm);
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d->tree = new QPFGlyphTree(data);
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glyphFormat = (d->fm.flags & FM_SMOOTH) ? QFontEngineGlyphCache::Raster_A8
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: QFontEngineGlyphCache::Raster_Mono;
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#if 0
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qDebug() << "font file" << fn
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<< "ascent" << d->fm.ascent << "descent" << d->fm.descent
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<< "leftbearing" << d->fm.leftbearing
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<< "rightbearing" << d->fm.rightbearing
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<< "maxwidth" << d->fm.maxwidth
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<< "leading" << d->fm.leading
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<< "flags" << d->fm.flags
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<< "underlinepos" << d->fm.underlinepos
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<< "underlinewidth" << d->fm.underlinewidth;
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#endif
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}
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}
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QFontEngineQPF1::~QFontEngineQPF1()
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{
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if (d->mmapStart) {
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#if defined(QT_USE_MMAP)
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if (d->used_mmap)
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::munmap(d->mmapStart, d->mmapLength);
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else
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#endif
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delete [] d->mmapStart;
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}
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delete d->tree;
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delete d;
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}
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bool QFontEngineQPF1::stringToCMap(const QChar *str, 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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*nglyphs = 0;
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bool mirrored = flags & QTextEngine::RightToLeft;
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for(int i = 0; i < len; i++) {
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unsigned int uc = getChar(str, i, len);
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if (mirrored)
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uc = QChar::mirroredChar(uc);
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glyphs->glyphs[*nglyphs] = uc < 0x10000 ? uc : 0;
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++*nglyphs;
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}
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glyphs->numGlyphs = *nglyphs;
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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 QFontEngineQPF1::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const
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{
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for(int i = 0; i < glyphs->numGlyphs; i++) {
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QPFGlyph *glyph = d->tree->get(glyphs->glyphs[i]);
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glyphs->advances_x[i] = glyph ? glyph->metrics->advance : 0;
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glyphs->advances_y[i] = 0;
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if (!glyph)
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glyphs->glyphs[i] = 0;
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}
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}
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void QFontEngineQPF1::draw(QPaintEngine *p, qreal _x, qreal _y, const QTextItemInt &si)
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{
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QPaintEngineState *pState = p->state;
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QRasterPaintEngine *paintEngine = static_cast<QRasterPaintEngine*>(p);
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QTransform matrix = pState->transform();
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matrix.translate(_x, _y);
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QFixed x = QFixed::fromReal(matrix.dx());
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QFixed y = QFixed::fromReal(matrix.dy());
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QVarLengthArray<QFixedPoint> positions;
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QVarLengthArray<glyph_t> glyphs;
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getGlyphPositions(si.glyphs, matrix, si.flags, glyphs, positions);
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if (glyphs.size() == 0)
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return;
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int depth = (d->fm.flags & FM_SMOOTH) ? 8 : 1;
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for(int i = 0; i < glyphs.size(); i++) {
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const QPFGlyph *glyph = d->tree->get(glyphs[i]);
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if (!glyph)
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continue;
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int bpl = glyph->metrics->linestep;
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if(glyph->data)
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paintEngine->alphaPenBlt(glyph->data, bpl, depth,
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qRound(positions[i].x) + glyph->metrics->bearingx,
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qRound(positions[i].y) - glyph->metrics->bearingy,
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glyph->metrics->width,glyph->metrics->height);
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}
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}
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QImage QFontEngineQPF1::alphaMapForGlyph(glyph_t g)
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{
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const QPFGlyph *glyph = d->tree->get(g);
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if (!glyph)
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return QImage();
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int mono = !(d->fm.flags & FM_SMOOTH);
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const uchar *bits = glyph->data;//((const uchar *) glyph);
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QImage image;
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if (mono) {
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image = QImage((glyph->metrics->width+7)&~7, glyph->metrics->height, QImage::Format_Mono);
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image.setColor(0, qRgba(0, 0, 0, 0));
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image.setColor(1, qRgba(0, 0, 0, 255));
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} else {
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image = QImage(glyph->metrics->width, glyph->metrics->height, QImage::Format_Indexed8);
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for (int j=0; j<256; ++j)
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image.setColor(j, qRgba(0, 0, 0, j));
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}
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for (int i=0; i<glyph->metrics->height; ++i) {
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memcpy(image.scanLine(i), bits, glyph->metrics->linestep);
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bits += glyph->metrics->linestep;
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}
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return image;
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}
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void QFontEngineQPF1::addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags)
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{
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addBitmapFontToPath(x, y, glyphs, path, flags);
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}
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glyph_metrics_t QFontEngineQPF1::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 - lastRightBearing(glyphs), ascent()+descent()+1, w, 0);
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}
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glyph_metrics_t QFontEngineQPF1::boundingBox(glyph_t glyph)
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{
|
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const QPFGlyph *g = d->tree->get(glyph);
|
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if (!g)
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return glyph_metrics_t();
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Q_ASSERT(g);
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return glyph_metrics_t(g->metrics->bearingx, -g->metrics->bearingy,
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g->metrics->width, g->metrics->height,
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g->metrics->advance, 0);
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}
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QFixed QFontEngineQPF1::ascent() const
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{
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return d->fm.ascent;
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}
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QFixed QFontEngineQPF1::descent() const
|
|
{
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return d->fm.descent;
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}
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|
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QFixed QFontEngineQPF1::leading() const
|
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{
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return d->fm.leading;
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}
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|
|
qreal QFontEngineQPF1::maxCharWidth() const
|
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{
|
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return d->fm.maxwidth;
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}
|
|
/*
|
|
const char *QFontEngineQPF1::name() const
|
|
{
|
|
return "qt";
|
|
}
|
|
*/
|
|
bool QFontEngineQPF1::canRender(const QChar *str, int len)
|
|
{
|
|
for(int i = 0; i < len; i++)
|
|
if (!d->tree->inFont(str[i].unicode()))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
QFontEngine::Type QFontEngineQPF1::type() const
|
|
{
|
|
return QPF1;
|
|
}
|
|
|
|
qreal QFontEngineQPF1::minLeftBearing() const
|
|
{
|
|
return d->fm.leftbearing;
|
|
}
|
|
|
|
qreal QFontEngineQPF1::minRightBearing() const
|
|
{
|
|
return d->fm.rightbearing;
|
|
}
|
|
|
|
QFixed QFontEngineQPF1::underlinePosition() const
|
|
{
|
|
return d->fm.underlinepos;
|
|
}
|
|
|
|
QFixed QFontEngineQPF1::lineThickness() const
|
|
{
|
|
return d->fm.underlinewidth;
|
|
}
|
|
|
|
#endif //QT_NO_QWS_QPF
|
|
|
|
QT_END_NAMESPACE
|