Add HarfBuzz-to-Qt bridging code
Change-Id: I2f61566fe69d18b80d5831238beb27b34b7be1c8 Reviewed-by: Lars Knoll <lars.knoll@digia.com>
This commit is contained in:
Konstantin Ritt
The Qt Project
parent
9ff76c27b9
commit
19b7afca52
@ -48,6 +48,11 @@
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#include "qvarlengtharray.h"
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#include "qvarlengtharray.h"
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#include <qmath.h>
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#include <qmath.h>
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#include <qendian.h>
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#include <qendian.h>
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#ifdef QT_ENABLE_HARFBUZZ_NG
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# include "qharfbuzzng_p.h"
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# include <harfbuzz/hb-ot.h>
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#endif
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#include <private/qharfbuzz_p.h>
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#include <private/qharfbuzz_p.h>
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#include <algorithm>
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#include <algorithm>
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@ -73,6 +78,10 @@ static inline bool qtransform_equals_no_translate(const QTransform &a, const QTr
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// Harfbuzz helper functions
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// Harfbuzz helper functions
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#ifdef QT_ENABLE_HARFBUZZ_NG
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bool useHarfbuzzNG = qgetenv("QT_HARFBUZZ") != "old";
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#endif
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Q_STATIC_ASSERT(sizeof(HB_Glyph) == sizeof(glyph_t));
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Q_STATIC_ASSERT(sizeof(HB_Glyph) == sizeof(glyph_t));
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Q_STATIC_ASSERT(sizeof(HB_Fixed) == sizeof(QFixed));
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Q_STATIC_ASSERT(sizeof(HB_Fixed) == sizeof(QFixed));
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@ -253,6 +262,10 @@ QFixed QFontEngine::underlinePosition() const
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void *QFontEngine::harfbuzzFont() const
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void *QFontEngine::harfbuzzFont() const
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{
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{
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#ifdef QT_ENABLE_HARFBUZZ_NG
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if (useHarfbuzzNG)
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qFatal("Called QFontEngine::harfbuzzFont() in Harfbuzz-NG mode!");
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#endif
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if (!font_) {
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if (!font_) {
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HB_FontRec *hbFont = (HB_FontRec *) malloc(sizeof(HB_FontRec));
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HB_FontRec *hbFont = (HB_FontRec *) malloc(sizeof(HB_FontRec));
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Q_CHECK_PTR(hbFont);
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Q_CHECK_PTR(hbFont);
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@ -277,6 +290,10 @@ void *QFontEngine::harfbuzzFont() const
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void *QFontEngine::harfbuzzFace() const
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void *QFontEngine::harfbuzzFace() const
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{
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{
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#ifdef QT_ENABLE_HARFBUZZ_NG
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if (useHarfbuzzNG)
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qFatal("Called QFontEngine::harfbuzzFace() in Harfbuzz-NG mode!");
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#endif
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if (!face_) {
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if (!face_) {
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HB_Face hbFace = qHBNewFace(const_cast<QFontEngine *>(this), hb_getSFntTable);
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HB_Face hbFace = qHBNewFace(const_cast<QFontEngine *>(this), hb_getSFntTable);
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Q_CHECK_PTR(hbFace);
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Q_CHECK_PTR(hbFace);
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@ -292,6 +309,26 @@ void *QFontEngine::harfbuzzFace() const
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bool QFontEngine::supportsScript(QChar::Script script) const
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bool QFontEngine::supportsScript(QChar::Script script) const
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{
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{
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#ifdef QT_ENABLE_HARFBUZZ_NG
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if (useHarfbuzzNG) {
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bool ret = false;
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if (hb_face_t *face = hb_qt_face_get_for_engine(const_cast<QFontEngine *>(this))) {
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hb_tag_t script_tag_1, script_tag_2;
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hb_ot_tags_from_script(hb_qt_script_to_script(script), &script_tag_1, &script_tag_2);
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unsigned int script_index = -1;
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ret = hb_ot_layout_table_find_script(face, HB_OT_TAG_GSUB, script_tag_1, &script_index);
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if (!ret) {
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ret = hb_ot_layout_table_find_script(face, HB_OT_TAG_GSUB, script_tag_2, &script_index);
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if (!ret && script_tag_2 != HB_OT_TAG_DEFAULT_SCRIPT)
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ret = hb_ot_layout_table_find_script(face, HB_OT_TAG_GSUB, HB_OT_TAG_DEFAULT_SCRIPT, &script_index);
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}
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hb_face_destroy(face);
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}
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return ret;
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}
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#endif
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HB_Face hbFace = (HB_Face)harfbuzzFace();
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HB_Face hbFace = (HB_Face)harfbuzzFace();
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return hbFace->supported_scripts[script_to_hbscript(script)];
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return hbFace->supported_scripts[script_to_hbscript(script)];
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}
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}
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730
src/gui/text/qharfbuzzng.cpp
Normal file
730
src/gui/text/qharfbuzzng.cpp
Normal file
@ -0,0 +1,730 @@
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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Copyright (C) 2013 Konstantin Ritt
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** Contact: http://www.qt-project.org/legal
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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 Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/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 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt 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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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qharfbuzzng_p.h"
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#include <qstring.h>
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#include <qvector.h>
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#include "qfontengine_p.h"
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QT_BEGIN_NAMESPACE
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// Unicode routines
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static const hb_script_t _qtscript_to_hbscript[] = {
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HB_SCRIPT_UNKNOWN,
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HB_SCRIPT_INHERITED,
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HB_SCRIPT_COMMON,
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HB_SCRIPT_LATIN,
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HB_SCRIPT_GREEK,
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HB_SCRIPT_CYRILLIC,
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HB_SCRIPT_ARMENIAN,
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HB_SCRIPT_HEBREW,
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HB_SCRIPT_ARABIC,
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HB_SCRIPT_SYRIAC,
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HB_SCRIPT_THAANA,
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HB_SCRIPT_DEVANAGARI,
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HB_SCRIPT_BENGALI,
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HB_SCRIPT_GURMUKHI,
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HB_SCRIPT_GUJARATI,
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HB_SCRIPT_ORIYA,
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HB_SCRIPT_TAMIL,
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HB_SCRIPT_TELUGU,
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HB_SCRIPT_KANNADA,
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HB_SCRIPT_MALAYALAM,
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HB_SCRIPT_SINHALA,
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HB_SCRIPT_THAI,
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HB_SCRIPT_LAO,
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HB_SCRIPT_TIBETAN,
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HB_SCRIPT_MYANMAR,
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HB_SCRIPT_GEORGIAN,
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HB_SCRIPT_HANGUL,
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HB_SCRIPT_ETHIOPIC,
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HB_SCRIPT_CHEROKEE,
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HB_SCRIPT_CANADIAN_ABORIGINAL,
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HB_SCRIPT_OGHAM,
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HB_SCRIPT_RUNIC,
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HB_SCRIPT_KHMER,
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HB_SCRIPT_MONGOLIAN,
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HB_SCRIPT_HIRAGANA,
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HB_SCRIPT_KATAKANA,
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HB_SCRIPT_BOPOMOFO,
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HB_SCRIPT_HAN,
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HB_SCRIPT_YI,
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HB_SCRIPT_OLD_ITALIC,
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HB_SCRIPT_GOTHIC,
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HB_SCRIPT_DESERET,
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HB_SCRIPT_TAGALOG,
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HB_SCRIPT_HANUNOO,
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HB_SCRIPT_BUHID,
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HB_SCRIPT_TAGBANWA,
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HB_SCRIPT_COPTIC,
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HB_SCRIPT_LIMBU,
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HB_SCRIPT_TAI_LE,
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HB_SCRIPT_LINEAR_B,
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HB_SCRIPT_UGARITIC,
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HB_SCRIPT_SHAVIAN,
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HB_SCRIPT_OSMANYA,
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HB_SCRIPT_CYPRIOT,
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HB_SCRIPT_BRAILLE,
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HB_SCRIPT_BUGINESE,
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HB_SCRIPT_NEW_TAI_LUE,
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HB_SCRIPT_GLAGOLITIC,
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HB_SCRIPT_TIFINAGH,
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HB_SCRIPT_SYLOTI_NAGRI,
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HB_SCRIPT_OLD_PERSIAN,
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HB_SCRIPT_KHAROSHTHI,
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HB_SCRIPT_BALINESE,
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HB_SCRIPT_CUNEIFORM,
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HB_SCRIPT_PHOENICIAN,
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HB_SCRIPT_PHAGS_PA,
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HB_SCRIPT_NKO,
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HB_SCRIPT_SUNDANESE,
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HB_SCRIPT_LEPCHA,
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HB_SCRIPT_OL_CHIKI,
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HB_SCRIPT_VAI,
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HB_SCRIPT_SAURASHTRA,
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HB_SCRIPT_KAYAH_LI,
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HB_SCRIPT_REJANG,
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HB_SCRIPT_LYCIAN,
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HB_SCRIPT_CARIAN,
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HB_SCRIPT_LYDIAN,
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HB_SCRIPT_CHAM,
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HB_SCRIPT_TAI_THAM,
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HB_SCRIPT_TAI_VIET,
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HB_SCRIPT_AVESTAN,
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HB_SCRIPT_EGYPTIAN_HIEROGLYPHS,
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HB_SCRIPT_SAMARITAN,
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HB_SCRIPT_LISU,
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HB_SCRIPT_BAMUM,
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HB_SCRIPT_JAVANESE,
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HB_SCRIPT_MEETEI_MAYEK,
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HB_SCRIPT_IMPERIAL_ARAMAIC,
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HB_SCRIPT_OLD_SOUTH_ARABIAN,
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HB_SCRIPT_INSCRIPTIONAL_PARTHIAN,
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HB_SCRIPT_INSCRIPTIONAL_PAHLAVI,
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HB_SCRIPT_OLD_TURKIC,
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HB_SCRIPT_KAITHI,
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HB_SCRIPT_BATAK,
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HB_SCRIPT_BRAHMI,
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HB_SCRIPT_MANDAIC,
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HB_SCRIPT_CHAKMA,
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HB_SCRIPT_MEROITIC_CURSIVE,
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HB_SCRIPT_MEROITIC_HIEROGLYPHS,
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HB_SCRIPT_MIAO,
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HB_SCRIPT_SHARADA,
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HB_SCRIPT_SORA_SOMPENG,
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HB_SCRIPT_TAKRI
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};
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Q_STATIC_ASSERT(QChar::ScriptCount == sizeof(_qtscript_to_hbscript) / sizeof(_qtscript_to_hbscript[0]));
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hb_script_t hb_qt_script_to_script(QChar::Script script)
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{
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return _qtscript_to_hbscript[script];
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}
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QChar::Script hb_qt_script_from_script(hb_script_t script)
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{
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uint i = QChar::ScriptCount - 1;
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while (i > QChar::Script_Unknown && _qtscript_to_hbscript[i] != script)
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--i;
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return QChar::Script(i);
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}
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static hb_unicode_combining_class_t
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_hb_qt_unicode_combining_class(hb_unicode_funcs_t * /*ufuncs*/,
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hb_codepoint_t unicode,
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void * /*user_data*/)
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{
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return hb_unicode_combining_class_t(QChar::combiningClass(unicode));
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}
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static unsigned int
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_hb_qt_unicode_eastasian_width(hb_unicode_funcs_t * /*ufuncs*/,
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hb_codepoint_t /*unicode*/,
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void * /*user_data*/)
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{
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qCritical("hb_qt_unicode_eastasian_width: not implemented!");
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return 1;
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}
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static const hb_unicode_general_category_t _qtcategory_to_hbcategory[] = {
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HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK, // Mn
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HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK, // Mc
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HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK, // Me
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HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER, // Nd
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HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER, // Nl
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HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER, // No
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HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR, // Zs
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HB_UNICODE_GENERAL_CATEGORY_LINE_SEPARATOR, // Zl
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HB_UNICODE_GENERAL_CATEGORY_PARAGRAPH_SEPARATOR, // Zp
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HB_UNICODE_GENERAL_CATEGORY_CONTROL, // Cc
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HB_UNICODE_GENERAL_CATEGORY_FORMAT, // Cf
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HB_UNICODE_GENERAL_CATEGORY_SURROGATE, // Cs
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HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE, // Co
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HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED, // Cn
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HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER, // Lu
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HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER, // Ll
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HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER, // Lt
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HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER, // Lm
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HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER, // Lo
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HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION, // Pc
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HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION, // Pd
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HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION, // Ps
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HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION, // Pe
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HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION, // Pi
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HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION, // Pf
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HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION, // Po
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HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL, // Sm
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HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL, // Sc
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HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL, // Sk
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HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL // So
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};
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static hb_unicode_general_category_t
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_hb_qt_unicode_general_category(hb_unicode_funcs_t * /*ufuncs*/,
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hb_codepoint_t unicode,
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void * /*user_data*/)
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{
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return _qtcategory_to_hbcategory[QChar::category(unicode)];
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}
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static hb_codepoint_t
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_hb_qt_unicode_mirroring(hb_unicode_funcs_t * /*ufuncs*/,
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hb_codepoint_t unicode,
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void * /*user_data*/)
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{
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return QChar::mirroredChar(unicode);
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}
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static hb_script_t
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_hb_qt_unicode_script(hb_unicode_funcs_t * /*ufuncs*/,
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hb_codepoint_t unicode,
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void * /*user_data*/)
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{
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||||||
|
return _qtscript_to_hbscript[QChar::script(unicode)];
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_unicode_compose(hb_unicode_funcs_t * /*ufuncs*/,
|
||||||
|
hb_codepoint_t a, hb_codepoint_t b,
|
||||||
|
hb_codepoint_t *ab,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
// ### optimize
|
||||||
|
QString s = QString::fromUcs4(&a, 1) + QString::fromUcs4(&b, 1);
|
||||||
|
QString normalized = s.normalized(QString::NormalizationForm_C);
|
||||||
|
if (normalized.isEmpty())
|
||||||
|
return false;
|
||||||
|
|
||||||
|
QVector<uint> ucs4str = normalized.toUcs4();
|
||||||
|
if (ucs4str.size() == 1) {
|
||||||
|
*ab = ucs4str.at(0);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_unicode_decompose(hb_unicode_funcs_t * /*ufuncs*/,
|
||||||
|
hb_codepoint_t ab,
|
||||||
|
hb_codepoint_t *a, hb_codepoint_t *b,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
// ### optimize
|
||||||
|
if (QChar::decompositionTag(ab) != QChar::Canonical) // !NFD
|
||||||
|
return false;
|
||||||
|
|
||||||
|
QString normalized = QChar::decomposition(ab);
|
||||||
|
Q_ASSERT(!normalized.isEmpty());
|
||||||
|
|
||||||
|
const QVector<uint> ucs4str = normalized.toUcs4();
|
||||||
|
Q_ASSERT(ucs4str.size() <= HB_UNICODE_MAX_DECOMPOSITION_LEN);
|
||||||
|
|
||||||
|
if (ucs4str.size() == 1) {
|
||||||
|
*a = ucs4str.at(0);
|
||||||
|
*b = 0;
|
||||||
|
return *a != ab;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ucs4str.size() == 2) {
|
||||||
|
*a = ucs4str.at(0);
|
||||||
|
*b = ucs4str.at(1);
|
||||||
|
|
||||||
|
// Here's the ugly part: if ab decomposes to a single character and
|
||||||
|
// that character decomposes again, we have to detect that and undo
|
||||||
|
// the second part :-(
|
||||||
|
QString recomposed = normalized.normalized(QString::NormalizationForm_C);
|
||||||
|
if (recomposed.isEmpty() || recomposed == normalized)
|
||||||
|
return false;
|
||||||
|
|
||||||
|
hb_codepoint_t c = recomposed.toUcs4().at(0);
|
||||||
|
if (c != *a && c != ab) {
|
||||||
|
*a = c;
|
||||||
|
*b = 0;
|
||||||
|
}
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
// If decomposed to more than two characters, take the last one,
|
||||||
|
// and recompose the rest to get the first component
|
||||||
|
*b = ucs4str.last();
|
||||||
|
normalized.chop(1);
|
||||||
|
QString recomposed = normalized.normalized(QString::NormalizationForm_C);
|
||||||
|
if (recomposed.isEmpty() || recomposed == normalized)
|
||||||
|
return false;
|
||||||
|
|
||||||
|
// We expect that recomposed has exactly one character now
|
||||||
|
*a = recomposed.toUcs4().at(0);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static unsigned int
|
||||||
|
_hb_qt_unicode_decompose_compatibility(hb_unicode_funcs_t * /*ufuncs*/,
|
||||||
|
hb_codepoint_t u,
|
||||||
|
hb_codepoint_t *decomposed,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
if (QChar::decompositionTag(u) == QChar::NoDecomposition) // !NFKD
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
const QString normalized = QChar::decomposition(u);
|
||||||
|
|
||||||
|
uint outlen = 0;
|
||||||
|
|
||||||
|
// ### replace with QCharIterator
|
||||||
|
const ushort *p = reinterpret_cast<const ushort *>(normalized.unicode());
|
||||||
|
const ushort *const e = p + normalized.size();
|
||||||
|
for ( ; p != e; ++p) {
|
||||||
|
uint ucs4 = *p;
|
||||||
|
if (QChar::isHighSurrogate(ucs4) && p + 1 != e && QChar::isLowSurrogate(p[1]))
|
||||||
|
ucs4 = QChar::surrogateToUcs4(ucs4, *++p);
|
||||||
|
Q_ASSERT(outlen < HB_UNICODE_MAX_DECOMPOSITION_LEN);
|
||||||
|
decomposed[outlen++] = ucs4;
|
||||||
|
}
|
||||||
|
|
||||||
|
return outlen;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
struct _hb_unicode_funcs_t {
|
||||||
|
_hb_unicode_funcs_t()
|
||||||
|
{
|
||||||
|
funcs = hb_unicode_funcs_create(NULL);
|
||||||
|
hb_unicode_funcs_set_combining_class_func(funcs, _hb_qt_unicode_combining_class, NULL, NULL);
|
||||||
|
hb_unicode_funcs_set_eastasian_width_func(funcs, _hb_qt_unicode_eastasian_width, NULL, NULL);
|
||||||
|
hb_unicode_funcs_set_general_category_func(funcs, _hb_qt_unicode_general_category, NULL, NULL);
|
||||||
|
hb_unicode_funcs_set_mirroring_func(funcs, _hb_qt_unicode_mirroring, NULL, NULL);
|
||||||
|
hb_unicode_funcs_set_script_func(funcs, _hb_qt_unicode_script, NULL, NULL);
|
||||||
|
hb_unicode_funcs_set_compose_func(funcs, _hb_qt_unicode_compose, NULL, NULL);
|
||||||
|
hb_unicode_funcs_set_decompose_func(funcs, _hb_qt_unicode_decompose, NULL, NULL);
|
||||||
|
hb_unicode_funcs_set_decompose_compatibility_func(funcs, _hb_qt_unicode_decompose_compatibility, NULL, NULL);
|
||||||
|
}
|
||||||
|
~_hb_unicode_funcs_t()
|
||||||
|
{
|
||||||
|
hb_unicode_funcs_destroy(funcs);
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_unicode_funcs_t *funcs;
|
||||||
|
};
|
||||||
|
|
||||||
|
Q_GLOBAL_STATIC(_hb_unicode_funcs_t, qt_ufuncs)
|
||||||
|
|
||||||
|
hb_unicode_funcs_t *hb_qt_get_unicode_funcs()
|
||||||
|
{
|
||||||
|
return qt_ufuncs()->funcs;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
// Font routines
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_font_get_glyph(hb_font_t * /*font*/, void *font_data,
|
||||||
|
hb_codepoint_t unicode, hb_codepoint_t /*variation_selector*/,
|
||||||
|
hb_codepoint_t *glyph,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
QFontEngine *fe = (QFontEngine *)font_data;
|
||||||
|
Q_ASSERT(fe);
|
||||||
|
|
||||||
|
glyph_t glyphs[2] = { 0, 0 };
|
||||||
|
|
||||||
|
QGlyphLayout g;
|
||||||
|
g.numGlyphs = 2;
|
||||||
|
g.glyphs = glyphs;
|
||||||
|
|
||||||
|
QChar chars[4];
|
||||||
|
int numChars = 0;
|
||||||
|
if (Q_UNLIKELY(QChar::requiresSurrogates(unicode))) {
|
||||||
|
chars[numChars++] = QChar(QChar::highSurrogate(unicode));
|
||||||
|
chars[numChars++] = QChar(QChar::lowSurrogate(unicode));
|
||||||
|
} else {
|
||||||
|
chars[numChars++] = QChar(unicode);
|
||||||
|
}
|
||||||
|
#if 0
|
||||||
|
if (Q_UNLIKELY(variation_selector != 0)) {
|
||||||
|
if (Q_UNLIKELY(QChar::requiresSurrogates(variation_selector))) {
|
||||||
|
chars[numChars++] = QChar(QChar::highSurrogate(variation_selector));
|
||||||
|
chars[numChars++] = QChar(QChar::lowSurrogate(variation_selector));
|
||||||
|
} else {
|
||||||
|
chars[numChars++] = QChar(variation_selector);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
int numGlyphs = g.numGlyphs;
|
||||||
|
bool ok = fe->stringToCMap(chars, numChars, &g, &numGlyphs, QFontEngine::GlyphIndicesOnly);
|
||||||
|
Q_ASSERT(ok); Q_UNUSED(ok)
|
||||||
|
|
||||||
|
*glyph = g.glyphs[0];
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_position_t
|
||||||
|
_hb_qt_font_get_glyph_h_advance(hb_font_t *font, void *font_data,
|
||||||
|
hb_codepoint_t glyph,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
QFontEngine *fe = (QFontEngine *)font_data;
|
||||||
|
Q_ASSERT(fe);
|
||||||
|
|
||||||
|
QFixed advance_x;
|
||||||
|
QFixed advance_y;
|
||||||
|
|
||||||
|
QGlyphLayout g;
|
||||||
|
g.numGlyphs = 1;
|
||||||
|
g.glyphs = &glyph;
|
||||||
|
g.advances_x = &advance_x;
|
||||||
|
g.advances_y = &advance_y;
|
||||||
|
|
||||||
|
fe->recalcAdvances(&g, QFontEngine::ShaperFlags(hb_qt_font_get_use_design_metrics(font)));
|
||||||
|
|
||||||
|
return g.advances_x[0].value();
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_position_t
|
||||||
|
_hb_qt_font_get_glyph_v_advance(hb_font_t * /*font*/, void * /*font_data*/,
|
||||||
|
hb_codepoint_t /*glyph*/,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
qCritical("hb_qt_font_get_glyph_v_advance: vertical writing isn't supported!");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_font_get_glyph_h_origin(hb_font_t * /*font*/, void * /*font_data*/,
|
||||||
|
hb_codepoint_t /*glyph*/,
|
||||||
|
hb_position_t * /*x*/, hb_position_t * /*y*/,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
return true; // we always work in the horizontal coordinates
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_font_get_glyph_v_origin(hb_font_t * /*font*/, void * /*font_data*/,
|
||||||
|
hb_codepoint_t /*glyph*/,
|
||||||
|
hb_position_t * /*x*/, hb_position_t * /*y*/,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
qCritical("hb_qt_get_glyph_v_origin: vertical writing isn't supported!");
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_position_t
|
||||||
|
_hb_qt_font_get_glyph_h_kerning(hb_font_t *font, void *font_data,
|
||||||
|
hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
QFontEngine *fe = (QFontEngine *)font_data;
|
||||||
|
Q_ASSERT(fe);
|
||||||
|
|
||||||
|
glyph_t glyphs[2] = { first_glyph, second_glyph };
|
||||||
|
QFixed advance_x;
|
||||||
|
QFixed advance_y;
|
||||||
|
|
||||||
|
QGlyphLayout g;
|
||||||
|
g.numGlyphs = 2;
|
||||||
|
g.glyphs = glyphs;
|
||||||
|
g.advances_x = &advance_x;
|
||||||
|
g.advances_y = &advance_y;
|
||||||
|
|
||||||
|
fe->doKerning(&g, QFontEngine::ShaperFlags(hb_qt_font_get_use_design_metrics(font)));
|
||||||
|
|
||||||
|
return g.advances_x[0].value();
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_position_t
|
||||||
|
_hb_qt_font_get_glyph_v_kerning(hb_font_t * /*font*/, void * /*font_data*/,
|
||||||
|
hb_codepoint_t /*first_glyph*/, hb_codepoint_t /*second_glyph*/,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
qCritical("hb_qt_get_glyph_v_kerning: vertical writing isn't supported!");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_font_get_glyph_extents(hb_font_t * /*font*/, void *font_data,
|
||||||
|
hb_codepoint_t glyph,
|
||||||
|
hb_glyph_extents_t *extents,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
QFontEngine *fe = (QFontEngine *)font_data;
|
||||||
|
Q_ASSERT(fe);
|
||||||
|
|
||||||
|
glyph_metrics_t gm = fe->boundingBox(glyph);
|
||||||
|
|
||||||
|
extents->x_bearing = gm.x.value();
|
||||||
|
extents->y_bearing = gm.y.value();
|
||||||
|
extents->width = gm.width.value();
|
||||||
|
extents->height = gm.height.value();
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_font_get_glyph_contour_point(hb_font_t * /*font*/, void *font_data,
|
||||||
|
hb_codepoint_t glyph,
|
||||||
|
unsigned int point_index, hb_position_t *x, hb_position_t *y,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
QFontEngine *fe = (QFontEngine *)font_data;
|
||||||
|
Q_ASSERT(fe);
|
||||||
|
|
||||||
|
QFixed xpos, ypos;
|
||||||
|
quint32 numPoints = 1;
|
||||||
|
if (Q_LIKELY(fe->getPointInOutline(glyph, 0, point_index, &xpos, &ypos, &numPoints) == 0)) {
|
||||||
|
*x = xpos.value();
|
||||||
|
*y = ypos.value();
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
*x = *y = 0;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_font_get_glyph_name(hb_font_t * /*font*/, void * /*font_data*/,
|
||||||
|
hb_codepoint_t /*glyph*/,
|
||||||
|
char *name, unsigned int size,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
qCritical("hb_qt_font_get_glyph_name: not implemented!");
|
||||||
|
if (size)
|
||||||
|
*name = '\0';
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static hb_bool_t
|
||||||
|
_hb_qt_font_get_glyph_from_name(hb_font_t * /*font*/, void * /*font_data*/,
|
||||||
|
const char * /*name*/, int /*len*/,
|
||||||
|
hb_codepoint_t *glyph,
|
||||||
|
void * /*user_data*/)
|
||||||
|
{
|
||||||
|
qCritical("hb_qt_font_get_glyph_from_name: not implemented!");
|
||||||
|
*glyph = 0;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static hb_user_data_key_t _useDesignMetricsKey;
|
||||||
|
|
||||||
|
void hb_qt_font_set_use_design_metrics(hb_font_t *font, uint value)
|
||||||
|
{
|
||||||
|
hb_font_set_user_data(font, &_useDesignMetricsKey, (void *)value, NULL, true);
|
||||||
|
}
|
||||||
|
|
||||||
|
uint hb_qt_font_get_use_design_metrics(hb_font_t *font)
|
||||||
|
{
|
||||||
|
return uint(hb_font_get_user_data(font, &_useDesignMetricsKey));
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
struct _hb_qt_font_funcs_t {
|
||||||
|
_hb_qt_font_funcs_t()
|
||||||
|
{
|
||||||
|
funcs = hb_font_funcs_create();
|
||||||
|
hb_font_funcs_set_glyph_func(funcs, _hb_qt_font_get_glyph, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_h_advance_func(funcs, _hb_qt_font_get_glyph_h_advance, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_v_advance_func(funcs, _hb_qt_font_get_glyph_v_advance, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_h_origin_func(funcs, _hb_qt_font_get_glyph_h_origin, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_v_origin_func(funcs, _hb_qt_font_get_glyph_v_origin, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_h_kerning_func(funcs, _hb_qt_font_get_glyph_h_kerning, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_v_kerning_func(funcs, _hb_qt_font_get_glyph_v_kerning, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_extents_func(funcs, _hb_qt_font_get_glyph_extents, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_contour_point_func(funcs, _hb_qt_font_get_glyph_contour_point, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_name_func(funcs, _hb_qt_font_get_glyph_name, NULL, NULL);
|
||||||
|
hb_font_funcs_set_glyph_from_name_func(funcs, _hb_qt_font_get_glyph_from_name, NULL, NULL);
|
||||||
|
}
|
||||||
|
~_hb_qt_font_funcs_t()
|
||||||
|
{
|
||||||
|
hb_font_funcs_destroy(funcs);
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_font_funcs_t *funcs;
|
||||||
|
};
|
||||||
|
|
||||||
|
Q_GLOBAL_STATIC(_hb_qt_font_funcs_t, qt_ffuncs)
|
||||||
|
|
||||||
|
hb_font_funcs_t *hb_qt_get_font_funcs()
|
||||||
|
{
|
||||||
|
return qt_ffuncs()->funcs;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static hb_blob_t *
|
||||||
|
_hb_qt_get_font_table(hb_face_t * /*face*/, hb_tag_t tag, void *user_data)
|
||||||
|
{
|
||||||
|
QFontEngine *fe = (QFontEngine *)user_data;
|
||||||
|
Q_ASSERT(fe);
|
||||||
|
|
||||||
|
uint length = 0;
|
||||||
|
if (Q_UNLIKELY(!fe->getSfntTableData(tag, 0, &length) || length == 0))
|
||||||
|
return hb_blob_get_empty();
|
||||||
|
|
||||||
|
char *buffer = (char *)malloc(length);
|
||||||
|
Q_CHECK_PTR(buffer);
|
||||||
|
|
||||||
|
if (Q_UNLIKELY(!fe->getSfntTableData(tag, reinterpret_cast<uchar *>(buffer), &length)))
|
||||||
|
length = 0;
|
||||||
|
|
||||||
|
return hb_blob_create(const_cast<const char *>(buffer), length,
|
||||||
|
HB_MEMORY_MODE_WRITABLE,
|
||||||
|
buffer, free);
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline hb_face_t *
|
||||||
|
_hb_qt_face_create(QFontEngine *fe)
|
||||||
|
{
|
||||||
|
hb_face_t *face;
|
||||||
|
|
||||||
|
face = hb_face_create_for_tables(_hb_qt_get_font_table, (void *)fe, NULL);
|
||||||
|
if (Q_UNLIKELY(hb_face_is_immutable(face))) {
|
||||||
|
hb_face_destroy(face);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_face_set_index(face, fe->faceId().index);
|
||||||
|
hb_face_set_upem(face, fe->emSquareSize().truncate());
|
||||||
|
|
||||||
|
return face;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
_hb_qt_face_release(void *user_data)
|
||||||
|
{
|
||||||
|
if (Q_LIKELY(user_data))
|
||||||
|
hb_face_destroy((hb_face_t *)user_data);
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_face_t *hb_qt_face_get_for_engine(QFontEngine *fe)
|
||||||
|
{
|
||||||
|
if (Q_UNLIKELY(!fe->face_)) {
|
||||||
|
fe->face_ = _hb_qt_face_create(fe);
|
||||||
|
if (Q_UNLIKELY(!fe->face_))
|
||||||
|
return NULL;
|
||||||
|
fe->face_destroy_func = _hb_qt_face_release;
|
||||||
|
}
|
||||||
|
|
||||||
|
return hb_face_reference((hb_face_t *)fe->face_);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static inline hb_font_t *
|
||||||
|
_hb_qt_font_create(QFontEngine *fe)
|
||||||
|
{
|
||||||
|
Q_ASSERT(fe);
|
||||||
|
|
||||||
|
hb_face_t *face = hb_qt_face_get_for_engine(fe);
|
||||||
|
if (Q_UNLIKELY(!face))
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
hb_font_t *font = hb_font_create(face);
|
||||||
|
|
||||||
|
hb_face_destroy(face); // ref-ed in hb_qt_face_get_for_engine()
|
||||||
|
|
||||||
|
if (Q_UNLIKELY(hb_font_is_immutable(font))) {
|
||||||
|
hb_font_destroy(font);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
const int y_ppem = fe->fontDef.pixelSize;
|
||||||
|
const int x_ppem = (fe->fontDef.pixelSize * fe->fontDef.stretch) / 100;
|
||||||
|
|
||||||
|
hb_font_set_funcs(font, hb_qt_get_font_funcs(), (void *)fe, NULL);
|
||||||
|
hb_font_set_scale(font, QFixed(x_ppem).value(), -QFixed(y_ppem).value());
|
||||||
|
hb_font_set_ppem(font, x_ppem, y_ppem);
|
||||||
|
|
||||||
|
return font;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
_hb_qt_font_release(void *user_data)
|
||||||
|
{
|
||||||
|
if (Q_LIKELY(user_data))
|
||||||
|
hb_font_destroy((hb_font_t *)user_data);
|
||||||
|
}
|
||||||
|
|
||||||
|
hb_font_t *hb_qt_font_get_for_engine(QFontEngine *fe)
|
||||||
|
{
|
||||||
|
if (Q_UNLIKELY(!fe->font_)) {
|
||||||
|
fe->font_ = _hb_qt_font_create(fe);
|
||||||
|
if (Q_UNLIKELY(!fe->font_))
|
||||||
|
return NULL;
|
||||||
|
fe->font_destroy_func = _hb_qt_font_release;
|
||||||
|
}
|
||||||
|
|
||||||
|
return hb_font_reference((hb_font_t *)fe->font_);
|
||||||
|
}
|
||||||
|
|
||||||
|
QT_END_NAMESPACE
|
||||||
85
src/gui/text/qharfbuzzng_p.h
Normal file
85
src/gui/text/qharfbuzzng_p.h
Normal file
@ -0,0 +1,85 @@
|
|||||||
|
/****************************************************************************
|
||||||
|
**
|
||||||
|
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
|
||||||
|
** Copyright (C) 2013 Konstantin Ritt
|
||||||
|
** 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.
|
||||||
|
**
|
||||||
|
**
|
||||||
|
** $QT_END_LICENSE$
|
||||||
|
**
|
||||||
|
****************************************************************************/
|
||||||
|
|
||||||
|
#ifndef QHARFBUZZNG_P_H
|
||||||
|
#define QHARFBUZZNG_P_H
|
||||||
|
|
||||||
|
//
|
||||||
|
// W A R N I N G
|
||||||
|
// -------------
|
||||||
|
//
|
||||||
|
// This file is not part of the Qt API. It exists for the convenience
|
||||||
|
// of other Qt classes. This header file may change from version to
|
||||||
|
// version without notice, or even be removed.
|
||||||
|
//
|
||||||
|
// We mean it.
|
||||||
|
//
|
||||||
|
|
||||||
|
#include <QtCore/qchar.h>
|
||||||
|
|
||||||
|
#include <harfbuzz/hb.h>
|
||||||
|
|
||||||
|
QT_BEGIN_NAMESPACE
|
||||||
|
|
||||||
|
class QFontEngine;
|
||||||
|
|
||||||
|
// Unicode
|
||||||
|
|
||||||
|
Q_GUI_EXPORT hb_script_t hb_qt_script_to_script(QChar::Script script);
|
||||||
|
Q_GUI_EXPORT QChar::Script hb_qt_script_from_script(hb_script_t script);
|
||||||
|
|
||||||
|
Q_GUI_EXPORT hb_unicode_funcs_t *hb_qt_get_unicode_funcs();
|
||||||
|
|
||||||
|
|
||||||
|
// Font
|
||||||
|
|
||||||
|
Q_GUI_EXPORT hb_font_funcs_t *hb_qt_get_font_funcs();
|
||||||
|
|
||||||
|
Q_GUI_EXPORT hb_face_t *hb_qt_face_get_for_engine(QFontEngine *fe);
|
||||||
|
Q_GUI_EXPORT hb_font_t *hb_qt_font_get_for_engine(QFontEngine *fe);
|
||||||
|
|
||||||
|
Q_GUI_EXPORT void hb_qt_font_set_use_design_metrics(hb_font_t *font, uint value);
|
||||||
|
Q_GUI_EXPORT uint hb_qt_font_get_use_design_metrics(hb_font_t *font);
|
||||||
|
|
||||||
|
QT_END_NAMESPACE
|
||||||
|
|
||||||
|
#endif // QHARFBUZZNG_P_H
|
||||||
@ -84,3 +84,12 @@ SOURCES += \
|
|||||||
|
|
||||||
HEADERS += \
|
HEADERS += \
|
||||||
text/qplatformfontdatabase.h
|
text/qplatformfontdatabase.h
|
||||||
|
|
||||||
|
contains(QT_CONFIG, harfbuzz)|contains(QT_CONFIG, system-harfbuzz) {
|
||||||
|
DEFINES += QT_ENABLE_HARFBUZZ_NG
|
||||||
|
|
||||||
|
include($$PWD/../../3rdparty/harfbuzz.pri)
|
||||||
|
|
||||||
|
SOURCES += text/qharfbuzzng.cpp
|
||||||
|
HEADERS += text/qharfbuzzng_p.h
|
||||||
|
}
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user