You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
4.3 KiB
128 lines
4.3 KiB
/****************************************************************************
|
|
**
|
|
** Text engine classes
|
|
**
|
|
** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
|
|
**
|
|
** This file is part of the kernel module of the Qt GUI Toolkit.
|
|
**
|
|
** This file may be used under the terms of the GNU General
|
|
** Public License versions 2.0 or 3.0 as published by the Free
|
|
** Software Foundation and appearing in the files LICENSE.GPL2
|
|
** and LICENSE.GPL3 included in the packaging of this file.
|
|
** Alternatively you may (at your option) use any later version
|
|
** of the GNU General Public License if such license has been
|
|
** publicly approved by Trolltech ASA (or its successors, if any)
|
|
** and the KDE Free Qt Foundation.
|
|
**
|
|
** Please review the following information to ensure GNU General
|
|
** Public Licensing requirements will be met:
|
|
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
|
|
** If you are unsure which license is appropriate for your use, please
|
|
** review the following information:
|
|
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
|
|
** or contact the sales department at sales@trolltech.com.
|
|
**
|
|
** This file may be used under the terms of the Q Public License as
|
|
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
|
|
** included in the packaging of this file. Licensees holding valid Qt
|
|
** Commercial licenses may use this file in accordance with the Qt
|
|
** Commercial License Agreement provided with the Software.
|
|
**
|
|
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
|
|
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
|
|
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
|
|
** herein.
|
|
**
|
|
**********************************************************************/
|
|
|
|
#include <assert.h>
|
|
|
|
|
|
QScriptItemArray::~QScriptItemArray()
|
|
{
|
|
clear();
|
|
free( d );
|
|
}
|
|
|
|
void QScriptItemArray::clear()
|
|
{
|
|
if ( d ) {
|
|
for ( unsigned int i = 0; i < d->size; i++ ) {
|
|
QScriptItem &si = d->items[i];
|
|
if ( si.fontEngine )
|
|
si.fontEngine->deref();
|
|
}
|
|
d->size = 0;
|
|
}
|
|
}
|
|
|
|
void QScriptItemArray::resize( int s )
|
|
{
|
|
int alloc = (s + 8) >> 3 << 3;
|
|
d = (QScriptItemArrayPrivate *)realloc( d, sizeof( QScriptItemArrayPrivate ) +
|
|
sizeof( QScriptItem ) * alloc );
|
|
d->alloc = alloc;
|
|
}
|
|
|
|
void QTextEngine::shape( int item ) const
|
|
{
|
|
assert( item < items.size() );
|
|
QScriptItem &si = items[item];
|
|
|
|
if ( si.num_glyphs )
|
|
return;
|
|
|
|
QFont::Script script = (QFont::Script)si.analysis.script;
|
|
si.glyph_data_offset = used;
|
|
|
|
if ( !si.fontEngine )
|
|
si.fontEngine = fnt->engineForScript( script );
|
|
si.fontEngine->ref();
|
|
|
|
si.ascent = si.fontEngine->ascent();
|
|
si.descent = si.fontEngine->descent();
|
|
si.num_glyphs = 0;
|
|
|
|
if ( si.fontEngine && si.fontEngine != (QFontEngine*)-1 ) {
|
|
QShaperItem shaper_item;
|
|
shaper_item.script = si.analysis.script;
|
|
shaper_item.string = &string;
|
|
shaper_item.from = si.position;
|
|
shaper_item.length = length(item);
|
|
shaper_item.font = si.fontEngine;
|
|
shaper_item.num_glyphs = QMAX(int(num_glyphs - used), shaper_item.length);
|
|
shaper_item.flags = si.analysis.bidiLevel % 2 ? RightToLeft : 0;
|
|
shaper_item.has_positioning = FALSE;
|
|
|
|
while (1) {
|
|
// qDebug(" . num_glyphs=%d, used=%d, item.num_glyphs=%d", num_glyphs, used, shaper_item.num_glyphs);
|
|
ensureSpace(shaper_item.num_glyphs);
|
|
shaper_item.num_glyphs = num_glyphs - used;
|
|
// qDebug(" .. num_glyphs=%d, used=%d, item.num_glyphs=%d", num_glyphs, used, shaper_item.num_glyphs);
|
|
shaper_item.glyphs = glyphs(&si);
|
|
shaper_item.advances = advances(&si);
|
|
shaper_item.offsets = offsets(&si);
|
|
shaper_item.attributes = glyphAttributes(&si);
|
|
shaper_item.log_clusters = logClusters(&si);
|
|
if (scriptEngines[shaper_item.script].shape(&shaper_item))
|
|
break;
|
|
}
|
|
|
|
si.num_glyphs = shaper_item.num_glyphs;
|
|
si.hasPositioning = shaper_item.has_positioning;
|
|
}
|
|
((QTextEngine *)this)->used += si.num_glyphs;
|
|
|
|
si.width = 0;
|
|
advance_t *advances = this->advances( &si );
|
|
advance_t *end = advances + si.num_glyphs;
|
|
while ( advances < end ) {
|
|
// qDebug("advances[%d] = %d", advances - this->advances(&si), *advances);
|
|
si.width += *(advances++);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|