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