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Diffstat (limited to 'src/gui/text/qfontengine_ft.cpp')
| -rw-r--r-- | src/gui/text/qfontengine_ft.cpp | 2074 |
1 files changed, 2074 insertions, 0 deletions
diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp new file mode 100644 index 0000000000..8f2da9b713 --- /dev/null +++ b/src/gui/text/qfontengine_ft.cpp @@ -0,0 +1,2074 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qdir.h" +#include "qmetatype.h" +#include "qtextstream.h" +#include "qvariant.h" +#include "qfontengine_ft_p.h" + +#ifndef QT_NO_FREETYPE + +#include "qfile.h" +#include "qabstractfileengine.h" +#include "qthreadstorage.h" +#include <qmath.h> +#include <private/qharfbuzz_p.h> + +#include "qfontengine_ft_p.h" +#include <ft2build.h> +#include FT_FREETYPE_H +#include FT_OUTLINE_H +#include FT_SYNTHESIS_H +#include FT_TRUETYPE_TABLES_H +#include FT_TYPE1_TABLES_H +#include FT_GLYPH_H + +#if defined(FT_LCD_FILTER_H) +#include FT_LCD_FILTER_H +#endif + +#if defined(FT_CONFIG_OPTIONS_H) +#include FT_CONFIG_OPTIONS_H +#endif + +#if defined(FT_LCD_FILTER_H) && defined(FT_CONFIG_OPTION_SUBPIXEL_RENDERING) +#define QT_USE_FREETYPE_LCDFILTER +#endif + +#ifdef QT_LINUXBASE +#include FT_ERRORS_H +#endif + +QT_BEGIN_NAMESPACE + +/* + * Freetype 2.1.7 and earlier used width/height + * for matching sizes in the BDF and PCF loaders. + * This has been fixed for 2.1.8. + */ +#if (FREETYPE_MAJOR*10000+FREETYPE_MINOR*100+FREETYPE_PATCH) >= 20105 +#define X_SIZE(face,i) ((face)->available_sizes[i].x_ppem) +#define Y_SIZE(face,i) ((face)->available_sizes[i].y_ppem) +#else +#define X_SIZE(face,i) ((face)->available_sizes[i].width << 6) +#define Y_SIZE(face,i) ((face)->available_sizes[i].height << 6) +#endif + +/* FreeType 2.1.10 starts to provide FT_GlyphSlot_Embolden */ +#if (FREETYPE_MAJOR*10000+FREETYPE_MINOR*100+FREETYPE_PATCH) >= 20110 +#define Q_FT_GLYPHSLOT_EMBOLDEN(slot) FT_GlyphSlot_Embolden(slot) +#else +#define Q_FT_GLYPHSLOT_EMBOLDEN(slot) +#endif + +#define FLOOR(x) ((x) & -64) +#define CEIL(x) (((x)+63) & -64) +#define TRUNC(x) ((x) >> 6) +#define ROUND(x) (((x)+32) & -64) + +static HB_Error hb_getSFntTable(void *font, HB_Tag tableTag, HB_Byte *buffer, HB_UInt *length) +{ +#if (FREETYPE_MAJOR*10000 + FREETYPE_MINOR*100 + FREETYPE_PATCH) > 20103 + FT_Face face = (FT_Face)font; + FT_ULong ftlen = *length; + FT_Error error = 0; + + if ( !FT_IS_SFNT(face) ) + return HB_Err_Invalid_Argument; + + error = FT_Load_Sfnt_Table(face, tableTag, 0, buffer, &ftlen); + *length = ftlen; + return (HB_Error)error; +#else + return HB_Err_Invalid_Argument; +#endif +} + +// -------------------------- Freetype support ------------------------------ + +class QtFreetypeData +{ +public: + QtFreetypeData() + : library(0) + { } + + FT_Library library; + QHash<QFontEngine::FaceId, QFreetypeFace *> faces; +}; + +#ifdef QT_NO_THREAD +Q_GLOBAL_STATIC(QtFreetypeData, theFreetypeData) + +QtFreetypeData *qt_getFreetypeData() +{ + return theFreetypeData(); +} +#else +Q_GLOBAL_STATIC(QThreadStorage<QtFreetypeData *>, theFreetypeData) + +QtFreetypeData *qt_getFreetypeData() +{ + QtFreetypeData *&freetypeData = theFreetypeData()->localData(); + if (!freetypeData) + freetypeData = new QtFreetypeData; + return freetypeData; +} +#endif + +FT_Library qt_getFreetype() +{ + QtFreetypeData *freetypeData = qt_getFreetypeData(); + if (!freetypeData->library) + FT_Init_FreeType(&freetypeData->library); + return freetypeData->library; +} + +int QFreetypeFace::fsType() const +{ + int fsType = 0; + TT_OS2 *os2 = (TT_OS2 *)FT_Get_Sfnt_Table(face, ft_sfnt_os2); + if (os2) + fsType = os2->fsType; + return fsType; +} + +HB_Error QFreetypeFace::getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints) +{ + if (HB_Error error = (HB_Error)FT_Load_Glyph(face, glyph, flags)) + return error; + + if (face->glyph->format != FT_GLYPH_FORMAT_OUTLINE) + return HB_Err_Invalid_SubTable; + + *nPoints = face->glyph->outline.n_points; + if (!(*nPoints)) + return HB_Err_Ok; + + if (point > *nPoints) + return HB_Err_Invalid_SubTable; + + *xpos = face->glyph->outline.points[point].x; + *ypos = face->glyph->outline.points[point].y; + + return HB_Err_Ok; +} + +/* + * One font file can contain more than one font (bold/italic for example) + * find the right one and return it. + * + * Returns the freetype face or 0 in case of an empty file or any other problems + * (like not being able to open the file) + */ +QFreetypeFace *QFreetypeFace::getFace(const QFontEngine::FaceId &face_id, + const QByteArray &fontData) +{ + if (face_id.filename.isEmpty() && fontData.isEmpty()) + return 0; + + QtFreetypeData *freetypeData = qt_getFreetypeData(); + if (!freetypeData->library) + FT_Init_FreeType(&freetypeData->library); + + QFreetypeFace *freetype = freetypeData->faces.value(face_id, 0); + if (freetype) { + freetype->ref.ref(); + } else { + QScopedPointer<QFreetypeFace> newFreetype(new QFreetypeFace); + FT_Face face; + if (!face_id.filename.isEmpty()) { + QFile file(QString::fromUtf8(face_id.filename)); + if (face_id.filename.startsWith(":qmemoryfonts/")) { + // from qfontdatabase.cpp + extern QByteArray qt_fontdata_from_index(int); + QByteArray idx = face_id.filename; + idx.remove(0, 14); // remove ':qmemoryfonts/' + bool ok = false; + newFreetype->fontData = qt_fontdata_from_index(idx.toInt(&ok)); + if (!ok) + newFreetype->fontData = QByteArray(); + } else if (!(file.fileEngine()->fileFlags(QAbstractFileEngine::FlagsMask) & QAbstractFileEngine::LocalDiskFlag)) { + if (!file.open(QIODevice::ReadOnly)) { + return 0; + } + newFreetype->fontData = file.readAll(); + } + } else { + newFreetype->fontData = fontData; + } + if (!newFreetype->fontData.isEmpty()) { + if (FT_New_Memory_Face(freetypeData->library, (const FT_Byte *)newFreetype->fontData.constData(), newFreetype->fontData.size(), face_id.index, &face)) { + return 0; + } + } else if (FT_New_Face(freetypeData->library, face_id.filename, face_id.index, &face)) { + return 0; + } + newFreetype->face = face; + + newFreetype->hbFace = qHBNewFace(face, hb_getSFntTable); + Q_CHECK_PTR(newFreetype->hbFace); + newFreetype->ref = 1; + newFreetype->xsize = 0; + newFreetype->ysize = 0; + newFreetype->matrix.xx = 0x10000; + newFreetype->matrix.yy = 0x10000; + newFreetype->matrix.xy = 0; + newFreetype->matrix.yx = 0; + newFreetype->unicode_map = 0; + newFreetype->symbol_map = 0; +#ifndef QT_NO_FONTCONFIG + newFreetype->charset = 0; +#endif + + memset(newFreetype->cmapCache, 0, sizeof(newFreetype->cmapCache)); + + for (int i = 0; i < newFreetype->face->num_charmaps; ++i) { + FT_CharMap cm = newFreetype->face->charmaps[i]; + switch(cm->encoding) { + case FT_ENCODING_UNICODE: + newFreetype->unicode_map = cm; + break; + case FT_ENCODING_APPLE_ROMAN: + case FT_ENCODING_ADOBE_LATIN_1: + if (!newFreetype->unicode_map || newFreetype->unicode_map->encoding != FT_ENCODING_UNICODE) + newFreetype->unicode_map = cm; + break; + case FT_ENCODING_ADOBE_CUSTOM: + case FT_ENCODING_MS_SYMBOL: + if (!newFreetype->symbol_map) + newFreetype->symbol_map = cm; + break; + default: + break; + } + } + + if (!FT_IS_SCALABLE(newFreetype->face) && newFreetype->face->num_fixed_sizes == 1) + FT_Set_Char_Size (face, X_SIZE(newFreetype->face, 0), Y_SIZE(newFreetype->face, 0), 0, 0); +# if 0 + FcChar8 *name; + FcPatternGetString(pattern, FC_FAMILY, 0, &name); + qDebug("%s: using maps: default: %x unicode: %x, symbol: %x", name, + newFreetype->face->charmap ? newFreetype->face->charmap->encoding : 0, + newFreetype->unicode_map ? newFreetype->unicode_map->encoding : 0, + newFreetype->symbol_map ? newFreetype->symbol_map->encoding : 0); + + for (int i = 0; i < 256; i += 8) + qDebug(" %x: %d %d %d %d %d %d %d %d", i, + FcCharSetHasChar(newFreetype->charset, i), FcCharSetHasChar(newFreetype->charset, i), + FcCharSetHasChar(newFreetype->charset, i), FcCharSetHasChar(newFreetype->charset, i), + FcCharSetHasChar(newFreetype->charset, i), FcCharSetHasChar(newFreetype->charset, i), + FcCharSetHasChar(newFreetype->charset, i), FcCharSetHasChar(newFreetype->charset, i)); +#endif + + FT_Set_Charmap(newFreetype->face, newFreetype->unicode_map); + QT_TRY { + freetypeData->faces.insert(face_id, newFreetype.data()); + } QT_CATCH(...) { + newFreetype.take()->release(face_id); + // we could return null in principle instead of throwing + QT_RETHROW; + } + freetype = newFreetype.take(); + } + return freetype; +} + +void QFreetypeFace::release(const QFontEngine::FaceId &face_id) +{ + QtFreetypeData *freetypeData = qt_getFreetypeData(); + if (!ref.deref()) { + qHBFreeFace(hbFace); + FT_Done_Face(face); +#ifndef QT_NO_FONTCONFIG + if (charset) + FcCharSetDestroy(charset); +#endif + if(freetypeData->faces.contains(face_id)) + freetypeData->faces.take(face_id); + delete this; + } + if (freetypeData->faces.isEmpty()) { + FT_Done_FreeType(freetypeData->library); + freetypeData->library = 0; + } +} + + +void QFreetypeFace::computeSize(const QFontDef &fontDef, int *xsize, int *ysize, bool *outline_drawing) +{ + *ysize = qRound(fontDef.pixelSize * 64); + *xsize = *ysize * fontDef.stretch / 100; + *outline_drawing = false; + + /* + * Bitmap only faces must match exactly, so find the closest + * one (height dominant search) + */ + if (!(face->face_flags & FT_FACE_FLAG_SCALABLE)) { + int best = 0; + for (int i = 1; i < face->num_fixed_sizes; i++) { + if (qAbs(*ysize - Y_SIZE(face,i)) < + qAbs (*ysize - Y_SIZE(face, best)) || + (qAbs (*ysize - Y_SIZE(face, i)) == + qAbs (*ysize - Y_SIZE(face, best)) && + qAbs (*xsize - X_SIZE(face, i)) < + qAbs (*xsize - X_SIZE(face, best)))) { + best = i; + } + } + if (FT_Set_Char_Size (face, X_SIZE(face, best), Y_SIZE(face, best), 0, 0) == 0) { + *xsize = X_SIZE(face, best); + *ysize = Y_SIZE(face, best); + } else { + int err = 1; + if (!(face->face_flags & FT_FACE_FLAG_SCALABLE) && ysize == 0 && face->num_fixed_sizes >= 1) { + // work around FT 2.1.10 problem with BDF without PIXEL_SIZE property + err = FT_Set_Pixel_Sizes(face, face->available_sizes[0].width, face->available_sizes[0].height); + if (err && face->num_fixed_sizes == 1) + err = 0; //even more of a workaround... + } + + if (err) + *xsize = *ysize = 0; + } + } else { + *outline_drawing = (*xsize > (64<<6) || *ysize > (64<<6)); + } +} + +QFontEngine::Properties QFreetypeFace::properties() const +{ + QFontEngine::Properties p; + p.postscriptName = FT_Get_Postscript_Name(face); + PS_FontInfoRec font_info; + if (FT_Get_PS_Font_Info(face, &font_info) == 0) + p.copyright = font_info.notice; + if (FT_IS_SCALABLE(face)) { + p.ascent = face->ascender; + p.descent = -face->descender; + p.leading = face->height - face->ascender + face->descender; + p.emSquare = face->units_per_EM; + p.boundingBox = QRectF(face->bbox.xMin, -face->bbox.yMax, + face->bbox.xMax - face->bbox.xMin, + face->bbox.yMax - face->bbox.yMin); + } else { + p.ascent = QFixed::fromFixed(face->size->metrics.ascender); + p.descent = QFixed::fromFixed(-face->size->metrics.descender); + p.leading = QFixed::fromFixed(face->size->metrics.height - face->size->metrics.ascender + face->size->metrics.descender); + p.emSquare = face->size->metrics.y_ppem; +// p.boundingBox = QRectF(-p.ascent.toReal(), 0, (p.ascent + p.descent).toReal(), face->size->metrics.max_advance/64.); + p.boundingBox = QRectF(0, -p.ascent.toReal(), + face->size->metrics.max_advance/64, (p.ascent + p.descent).toReal() ); + } + p.italicAngle = 0; + p.capHeight = p.ascent; + p.lineWidth = face->underline_thickness; + return p; +} + +bool QFreetypeFace::getSfntTable(uint tag, uchar *buffer, uint *length) const +{ + bool result = false; +#if (FREETYPE_MAJOR*10000 + FREETYPE_MINOR*100 + FREETYPE_PATCH) > 20103 + if (FT_IS_SFNT(face)) { + FT_ULong len = *length; + result = FT_Load_Sfnt_Table(face, tag, 0, buffer, &len) == FT_Err_Ok; + *length = len; + } +#endif + return result; +} + +/* Some fonts (such as MingLiu rely on hinting to scale different + components to their correct sizes. While this is really broken (it + should be done in the component glyph itself, not the hinter) we + will have to live with it. + + This means we can not use FT_LOAD_NO_HINTING to get the glyph + outline. All we can do is to load the unscaled glyph and scale it + down manually when required. +*/ +static void scaleOutline(FT_Face face, FT_GlyphSlot g, FT_Fixed x_scale, FT_Fixed y_scale) +{ + x_scale = FT_MulDiv(x_scale, 1 << 10, face->units_per_EM); + y_scale = FT_MulDiv(y_scale, 1 << 10, face->units_per_EM); + FT_Vector *p = g->outline.points; + const FT_Vector *e = p + g->outline.n_points; + while (p < e) { + p->x = FT_MulFix(p->x, x_scale); + p->y = FT_MulFix(p->y, y_scale); + ++p; + } +} + +void QFreetypeFace::addGlyphToPath(FT_Face face, FT_GlyphSlot g, const QFixedPoint &point, QPainterPath *path, FT_Fixed x_scale, FT_Fixed y_scale) +{ + const qreal factor = 1/64.; + scaleOutline(face, g, x_scale, y_scale); + + QPointF cp = point.toPointF(); + + // convert the outline to a painter path + int i = 0; + for (int j = 0; j < g->outline.n_contours; ++j) { + int last_point = g->outline.contours[j]; + QPointF start = cp + QPointF(g->outline.points[i].x*factor, -g->outline.points[i].y*factor); + if(!(g->outline.tags[i] & 1)) { + start += cp + QPointF(g->outline.points[last_point].x*factor, -g->outline.points[last_point].y*factor); + start /= 2; + } +// qDebug("contour: %d -- %d", i, g->outline.contours[j]); +// qDebug("first point at %f %f", start.x(), start.y()); + path->moveTo(start); + + QPointF c[4]; + c[0] = start; + int n = 1; + while (i < last_point) { + ++i; + c[n] = cp + QPointF(g->outline.points[i].x*factor, -g->outline.points[i].y*factor); +// qDebug() << " i=" << i << " flag=" << (int)g->outline.tags[i] << "point=" << c[n]; + ++n; + switch (g->outline.tags[i] & 3) { + case 2: + // cubic bezier element + if (n < 4) + continue; + c[3] = (c[3] + c[2])/2; + --i; + break; + case 0: + // quadratic bezier element + if (n < 3) + continue; + c[3] = (c[1] + c[2])/2; + c[2] = (2*c[1] + c[3])/3; + c[1] = (2*c[1] + c[0])/3; + --i; + break; + case 1: + case 3: + if (n == 2) { +// qDebug() << "lineTo" << c[1]; + path->lineTo(c[1]); + c[0] = c[1]; + n = 1; + continue; + } else if (n == 3) { + c[3] = c[2]; + c[2] = (2*c[1] + c[3])/3; + c[1] = (2*c[1] + c[0])/3; + } + break; + } +// qDebug() << "cubicTo" << c[1] << c[2] << c[3]; + path->cubicTo(c[1], c[2], c[3]); + c[0] = c[3]; + n = 1; + } + if (n == 1) { +// qDebug() << "closeSubpath"; + path->closeSubpath(); + } else { + c[3] = start; + if (n == 2) { + c[2] = (2*c[1] + c[3])/3; + c[1] = (2*c[1] + c[0])/3; + } +// qDebug() << "cubicTo" << c[1] << c[2] << c[3]; + path->cubicTo(c[1], c[2], c[3]); + } + ++i; + } +} + +extern void qt_addBitmapToPath(qreal x0, qreal y0, const uchar *image_data, int bpl, int w, int h, QPainterPath *path); + +void QFreetypeFace::addBitmapToPath(FT_GlyphSlot slot, const QFixedPoint &point, QPainterPath *path, bool) +{ + if (slot->format != FT_GLYPH_FORMAT_BITMAP + || slot->bitmap.pixel_mode != FT_PIXEL_MODE_MONO) + return; + + QPointF cp = point.toPointF(); + qt_addBitmapToPath(cp.x() + TRUNC(slot->metrics.horiBearingX), cp.y() - TRUNC(slot->metrics.horiBearingY), + slot->bitmap.buffer, slot->bitmap.pitch, slot->bitmap.width, slot->bitmap.rows, path); +} + +QFontEngineFT::Glyph::~Glyph() +{ + delete [] data; +} + +static const uint subpixel_filter[3][3] = { + { 180, 60, 16 }, + { 38, 180, 38 }, + { 16, 60, 180 } +}; + +static inline uint filterPixel(uint red, uint green, uint blue, bool legacyFilter) +{ + uint res; + if (legacyFilter) { + uint high = (red*subpixel_filter[0][0] + green*subpixel_filter[0][1] + blue*subpixel_filter[0][2]) >> 8; + uint mid = (red*subpixel_filter[1][0] + green*subpixel_filter[1][1] + blue*subpixel_filter[1][2]) >> 8; + uint low = (red*subpixel_filter[2][0] + green*subpixel_filter[2][1] + blue*subpixel_filter[2][2]) >> 8; + res = (mid << 24) + (high << 16) + (mid << 8) + low; + } else { + uint alpha = green; + res = (alpha << 24) + (red << 16) + (green << 8) + blue; + } + return res; +} + +static void convertRGBToARGB(const uchar *src, uint *dst, int width, int height, int src_pitch, bool bgr, bool legacyFilter) +{ + int h = height; + const int offs = bgr ? -1 : 1; + const int w = width * 3; + while (h--) { + uint *dd = dst; + for (int x = 0; x < w; x += 3) { + uint red = src[x+1-offs]; + uint green = src[x+1]; + uint blue = src[x+1+offs]; + *dd = filterPixel(red, green, blue, legacyFilter); + ++dd; + } + dst += width; + src += src_pitch; + } +} + +static void convertRGBToARGB_V(const uchar *src, uint *dst, int width, int height, int src_pitch, bool bgr, bool legacyFilter) +{ + int h = height; + const int offs = bgr ? -src_pitch : src_pitch; + while (h--) { + for (int x = 0; x < width; x++) { + uint red = src[x+src_pitch-offs]; + uint green = src[x+src_pitch]; + uint blue = src[x+src_pitch+offs]; + dst[x] = filterPixel(red, green, blue, legacyFilter); + } + dst += width; + src += 3*src_pitch; + } +} + +static void convoluteBitmap(const uchar *src, uchar *dst, int width, int height, int pitch) +{ + // convolute the bitmap with a triangle filter to get rid of color fringes + // If we take account for a gamma value of 2, we end up with + // weights of 1, 4, 9, 4, 1. We use an approximation of 1, 3, 8, 3, 1 here, + // as this nicely sums up to 16 :) + int h = height; + while (h--) { + dst[0] = dst[1] = 0; + // + for (int x = 2; x < width - 2; ++x) { + uint sum = src[x-2] + 3*src[x-1] + 8*src[x] + 3*src[x+1] + src[x+2]; + dst[x] = (uchar) (sum >> 4); + } + dst[width - 2] = dst[width - 1] = 0; + src += pitch; + dst += pitch; + } +} + +QFontEngineFT::QFontEngineFT(const QFontDef &fd) +{ + fontDef = fd; + matrix.xx = 0x10000; + matrix.yy = 0x10000; + matrix.xy = 0; + matrix.yx = 0; + cache_cost = 100; + kerning_pairs_loaded = false; + transform = false; + embolden = false; + antialias = true; + freetype = 0; + default_load_flags = FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; + default_hint_style = HintNone; + subpixelType = Subpixel_None; + lcdFilterType = 0; +#if defined(FT_LCD_FILTER_H) + lcdFilterType = (int)((quintptr) FT_LCD_FILTER_DEFAULT); +#endif + defaultFormat = Format_None; + canUploadGlyphsToServer = false; + embeddedbitmap = false; +} + +QFontEngineFT::~QFontEngineFT() +{ + if (freetype) + freetype->release(face_id); + hbFace = 0; // we share the face in QFreeTypeFace, don't let ~QFontEngine delete it +} + +void QFontEngineFT::freeGlyphSets() +{ + freeServerGlyphSet(defaultGlyphSet.id); + for (int i = 0; i < transformedGlyphSets.count(); ++i) + freeServerGlyphSet(transformedGlyphSets.at(i).id); +} + +bool QFontEngineFT::init(FaceId faceId, bool antialias, GlyphFormat format, + const QByteArray &fontData) +{ + return init(faceId, antialias, format, QFreetypeFace::getFace(faceId, fontData)); +} + +bool QFontEngineFT::init(FaceId faceId, bool antialias, GlyphFormat format, + QFreetypeFace *freetypeFace) +{ + freetype = freetypeFace; + if (!freetype) { + xsize = 0; + ysize = 0; + return false; + } + defaultFormat = format; + this->antialias = antialias; + + if (!antialias) + glyphFormat = QFontEngineGlyphCache::Raster_Mono; + else if (format == Format_A8) + glyphFormat = QFontEngineGlyphCache::Raster_A8; + else if (format == Format_A32) + glyphFormat = QFontEngineGlyphCache::Raster_RGBMask; + + face_id = faceId; + + symbol = freetype->symbol_map != 0; + PS_FontInfoRec psrec; + // don't assume that type1 fonts are symbol fonts by default + if (FT_Get_PS_Font_Info(freetype->face, &psrec) == FT_Err_Ok) { + symbol = bool(fontDef.family.contains(QLatin1String("symbol"), Qt::CaseInsensitive)); + } + // ##### + freetype->hbFace->isSymbolFont = symbol; + + lbearing = rbearing = SHRT_MIN; + freetype->computeSize(fontDef, &xsize, &ysize, &defaultGlyphSet.outline_drawing); + + FT_Face face = lockFace(); + + if (FT_IS_SCALABLE(face)) { + bool fake_oblique = (fontDef.style != QFont::StyleNormal) && !(face->style_flags & FT_STYLE_FLAG_ITALIC); + if (fake_oblique) + matrix.xy = 0x10000*3/10; + FT_Set_Transform(face, &matrix, 0); + freetype->matrix = matrix; + if (fake_oblique) + transform = true; + // fake bold + if ((fontDef.weight == QFont::Bold) && !(face->style_flags & FT_STYLE_FLAG_BOLD) && !FT_IS_FIXED_WIDTH(face)) + embolden = true; + // underline metrics + line_thickness = QFixed::fromFixed(FT_MulFix(face->underline_thickness, face->size->metrics.y_scale)); + underline_position = QFixed::fromFixed(-FT_MulFix(face->underline_position, face->size->metrics.y_scale)); + } else { + // copied from QFontEngineQPF + // ad hoc algorithm + int score = fontDef.weight * fontDef.pixelSize; + line_thickness = score / 700; + // looks better with thicker line for small pointsizes + if (line_thickness < 2 && score >= 1050) + line_thickness = 2; + underline_position = ((line_thickness * 2) + 3) / 6; + } + if (line_thickness < 1) + line_thickness = 1; + + hbFont.x_ppem = face->size->metrics.x_ppem; + hbFont.y_ppem = face->size->metrics.y_ppem; + hbFont.x_scale = face->size->metrics.x_scale; + hbFont.y_scale = face->size->metrics.y_scale; + + hbFace = freetype->hbFace; + + metrics = face->size->metrics; + +#if defined(Q_WS_QWS) || defined(Q_WS_QPA) + /* + TrueType fonts with embedded bitmaps may have a bitmap font specific + ascent/descent in the EBLC table. There is no direct public API + to extract those values. The only way we've found is to trick freetype + into thinking that it's not a scalable font in FT_SelectSize so that + the metrics are retrieved from the bitmap strikes. + */ + if (FT_IS_SCALABLE(face)) { + for (int i = 0; i < face->num_fixed_sizes; ++i) { + if (xsize == X_SIZE(face, i) && ysize == Y_SIZE(face, i)) { + face->face_flags &= ~FT_FACE_FLAG_SCALABLE; + + FT_Select_Size(face, i); + metrics.ascender = face->size->metrics.ascender; + metrics.descender = face->size->metrics.descender; + FT_Set_Char_Size(face, xsize, ysize, 0, 0); + + face->face_flags |= FT_FACE_FLAG_SCALABLE; + break; + } + } + } +#endif + + unlockFace(); + + fsType = freetype->fsType(); + defaultGlyphSet.id = allocateServerGlyphSet(); + return true; +} + +void QFontEngineFT::setDefaultHintStyle(HintStyle style) +{ + default_hint_style = style; +} + +int QFontEngineFT::loadFlags(QGlyphSet *set, GlyphFormat format, int flags, + bool &hsubpixel, int &vfactor) const +{ + int load_flags = FT_LOAD_DEFAULT | default_load_flags; + int load_target = default_hint_style == HintLight + ? FT_LOAD_TARGET_LIGHT + : FT_LOAD_TARGET_NORMAL; + + if (format == Format_Mono) { + load_target = FT_LOAD_TARGET_MONO; + } else if (format == Format_A32) { + if (subpixelType == QFontEngineFT::Subpixel_RGB || subpixelType == QFontEngineFT::Subpixel_BGR) { + if (default_hint_style == HintFull) + load_target = FT_LOAD_TARGET_LCD; + hsubpixel = true; + } else if (subpixelType == QFontEngineFT::Subpixel_VRGB || subpixelType == QFontEngineFT::Subpixel_VBGR) { + if (default_hint_style == HintFull) + load_target = FT_LOAD_TARGET_LCD_V; + vfactor = 3; + } + } + + if (set && set->outline_drawing) + load_flags = FT_LOAD_NO_BITMAP; + + if (default_hint_style == HintNone || (flags & HB_ShaperFlag_UseDesignMetrics)) + load_flags |= FT_LOAD_NO_HINTING; + else + load_flags |= load_target; + + return load_flags; +} + +QFontEngineFT::Glyph *QFontEngineFT::loadGlyphMetrics(QGlyphSet *set, uint glyph, GlyphFormat format) const +{ + Glyph *g = set->getGlyph(glyph); + if (g && g->format == format) + return g; + + bool hsubpixel = false; + int vfactor = 1; + int load_flags = loadFlags(set, format, 0, hsubpixel, vfactor); + + // apply our matrix to this, but note that the metrics will not be affected by this. + FT_Face face = lockFace(); + FT_Matrix matrix = this->matrix; + FT_Matrix_Multiply(&set->transformationMatrix, &matrix); + FT_Set_Transform(face, &matrix, 0); + freetype->matrix = matrix; + + bool transform = matrix.xx != 0x10000 || matrix.yy != 0x10000 || matrix.xy != 0 || matrix.yx != 0; + if (transform) + load_flags |= FT_LOAD_NO_BITMAP; + + FT_Error err = FT_Load_Glyph(face, glyph, load_flags); + if (err && (load_flags & FT_LOAD_NO_BITMAP)) { + load_flags &= ~FT_LOAD_NO_BITMAP; + err = FT_Load_Glyph(face, glyph, load_flags); + } + if (err == FT_Err_Too_Few_Arguments) { + // this is an error in the bytecode interpreter, just try to run without it + load_flags |= FT_LOAD_FORCE_AUTOHINT; + err = FT_Load_Glyph(face, glyph, load_flags); + } + if (err != FT_Err_Ok) + qWarning("load glyph failed err=%x face=%p, glyph=%d", err, face, glyph); + + unlockFace(); + if (set->outline_drawing) + return 0; + + if (!g) { + g = new Glyph; + g->uploadedToServer = false; + g->data = 0; + } + + FT_GlyphSlot slot = face->glyph; + if (embolden) Q_FT_GLYPHSLOT_EMBOLDEN(slot); + int left = slot->metrics.horiBearingX; + int right = slot->metrics.horiBearingX + slot->metrics.width; + int top = slot->metrics.horiBearingY; + int bottom = slot->metrics.horiBearingY - slot->metrics.height; + if (transform && slot->format != FT_GLYPH_FORMAT_BITMAP) { // freetype doesn't apply the transformation on the metrics + int l, r, t, b; + FT_Vector vector; + vector.x = left; + vector.y = top; + FT_Vector_Transform(&vector, &matrix); + l = r = vector.x; + t = b = vector.y; + vector.x = right; + vector.y = top; + FT_Vector_Transform(&vector, &matrix); + if (l > vector.x) l = vector.x; + if (r < vector.x) r = vector.x; + if (t < vector.y) t = vector.y; + if (b > vector.y) b = vector.y; + vector.x = right; + vector.y = bottom; + FT_Vector_Transform(&vector, &matrix); + if (l > vector.x) l = vector.x; + if (r < vector.x) r = vector.x; + if (t < vector.y) t = vector.y; + if (b > vector.y) b = vector.y; + vector.x = left; + vector.y = bottom; + FT_Vector_Transform(&vector, &matrix); + if (l > vector.x) l = vector.x; + if (r < vector.x) r = vector.x; + if (t < vector.y) t = vector.y; + if (b > vector.y) b = vector.y; + left = l; + right = r; + top = t; + bottom = b; + } + left = FLOOR(left); + right = CEIL(right); + bottom = FLOOR(bottom); + top = CEIL(top); + + g->linearAdvance = face->glyph->linearHoriAdvance >> 10; + g->width = TRUNC(right-left); + g->height = TRUNC(top-bottom); + g->x = TRUNC(left); + g->y = TRUNC(top); + g->advance = TRUNC(ROUND(face->glyph->advance.x)); + g->format = Format_None; + + return g; +} + +QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, + QFixed subPixelPosition, + GlyphFormat format, + bool fetchMetricsOnly) const +{ +// Q_ASSERT(freetype->lock == 1); + + bool uploadToServer = false; + if (format == Format_None) { + if (defaultFormat != Format_None) { + format = defaultFormat; + if (canUploadGlyphsToServer) + uploadToServer = true; + } else { + format = Format_Mono; + } + } + + Glyph *g = set->getGlyph(glyph, subPixelPosition); + if (g && g->format == format) { + if (uploadToServer && !g->uploadedToServer) { + set->setGlyph(glyph, subPixelPosition, 0); + delete g; + g = 0; + } else { + return g; + } + } + + QFontEngineFT::GlyphInfo info; + + Q_ASSERT(format != Format_None); + bool hsubpixel = false; + int vfactor = 1; + int load_flags = loadFlags(set, format, 0, hsubpixel, vfactor); + +#ifndef Q_WS_QWS + if (format != Format_Mono && !embeddedbitmap) + load_flags |= FT_LOAD_NO_BITMAP; +#endif + + FT_Matrix matrix = freetype->matrix; + bool transform = matrix.xx != 0x10000 + || matrix.yy != 0x10000 + || matrix.xy != 0 + || matrix.yx != 0; + + if (transform) + load_flags |= FT_LOAD_NO_BITMAP; + + FT_Face face = freetype->face; + + FT_Vector v; + v.x = format == Format_Mono ? 0 : FT_Pos(subPixelPosition.toReal() * 64); + v.y = 0; + FT_Set_Transform(face, &freetype->matrix, &v); + + FT_Error err = FT_Load_Glyph(face, glyph, load_flags); + if (err && (load_flags & FT_LOAD_NO_BITMAP)) { + load_flags &= ~FT_LOAD_NO_BITMAP; + err = FT_Load_Glyph(face, glyph, load_flags); + } + if (err == FT_Err_Too_Few_Arguments) { + // this is an error in the bytecode interpreter, just try to run without it + load_flags |= FT_LOAD_FORCE_AUTOHINT; + err = FT_Load_Glyph(face, glyph, load_flags); + } + if (err != FT_Err_Ok) + qWarning("load glyph failed err=%x face=%p, glyph=%d", err, face, glyph); + + if (set->outline_drawing && fetchMetricsOnly) + return 0; + + FT_GlyphSlot slot = face->glyph; + if (embolden) Q_FT_GLYPHSLOT_EMBOLDEN(slot); + FT_Library library = qt_getFreetype(); + + info.xOff = TRUNC(ROUND(slot->advance.x)); + info.yOff = 0; + + uchar *glyph_buffer = 0; + int glyph_buffer_size = 0; +#if defined(QT_USE_FREETYPE_LCDFILTER) + bool useFreetypeRenderGlyph = false; + if (slot->format == FT_GLYPH_FORMAT_OUTLINE && (hsubpixel || vfactor != 1)) { + err = FT_Library_SetLcdFilter(library, (FT_LcdFilter)lcdFilterType); + if (err == FT_Err_Ok) + useFreetypeRenderGlyph = true; + } + + if (useFreetypeRenderGlyph) { + err = FT_Render_Glyph(slot, hsubpixel ? FT_RENDER_MODE_LCD : FT_RENDER_MODE_LCD_V); + + if (err != FT_Err_Ok) + qWarning("render glyph failed err=%x face=%p, glyph=%d", err, face, glyph); + + FT_Library_SetLcdFilter(library, FT_LCD_FILTER_NONE); + + info.height = slot->bitmap.rows / vfactor; + info.width = hsubpixel ? slot->bitmap.width / 3 : slot->bitmap.width; + info.x = -slot->bitmap_left; + info.y = slot->bitmap_top; + + glyph_buffer_size = info.width * info.height * 4; + glyph_buffer = new uchar[glyph_buffer_size]; + + if (hsubpixel) + convertRGBToARGB(slot->bitmap.buffer, (uint *)glyph_buffer, info.width, info.height, slot->bitmap.pitch, subpixelType != QFontEngineFT::Subpixel_RGB, false); + else if (vfactor != 1) + convertRGBToARGB_V(slot->bitmap.buffer, (uint *)glyph_buffer, info.width, info.height, slot->bitmap.pitch, subpixelType != QFontEngineFT::Subpixel_VRGB, false); + } else +#endif + { + int left = slot->metrics.horiBearingX; + int right = slot->metrics.horiBearingX + slot->metrics.width; + int top = slot->metrics.horiBearingY; + int bottom = slot->metrics.horiBearingY - slot->metrics.height; + if(transform && slot->format != FT_GLYPH_FORMAT_BITMAP) { + int l, r, t, b; + FT_Vector vector; + vector.x = left; + vector.y = top; + FT_Vector_Transform(&vector, &matrix); + l = r = vector.x; + t = b = vector.y; + vector.x = right; + vector.y = top; + FT_Vector_Transform(&vector, &matrix); + if (l > vector.x) l = vector.x; + if (r < vector.x) r = vector.x; + if (t < vector.y) t = vector.y; + if (b > vector.y) b = vector.y; + vector.x = right; + vector.y = bottom; + FT_Vector_Transform(&vector, &matrix); + if (l > vector.x) l = vector.x; + if (r < vector.x) r = vector.x; + if (t < vector.y) t = vector.y; + if (b > vector.y) b = vector.y; + vector.x = left; + vector.y = bottom; + FT_Vector_Transform(&vector, &matrix); + if (l > vector.x) l = vector.x; + if (r < vector.x) r = vector.x; + if (t < vector.y) t = vector.y; + if (b > vector.y) b = vector.y; + left = l; + right = r; + top = t; + bottom = b; + } + left = FLOOR(left); + right = CEIL(right); + bottom = FLOOR(bottom); + top = CEIL(top); + + int hpixels = TRUNC(right - left); + // subpixel position requires one more pixel + if (subPixelPosition > 0 && format != Format_Mono) + hpixels++; + + if (hsubpixel) + hpixels = hpixels*3 + 8; + info.width = hpixels; + info.height = TRUNC(top - bottom); + info.x = -TRUNC(left); + info.y = TRUNC(top); + if (hsubpixel) { + info.width /= 3; + info.x += 1; + } + + bool large_glyph = (((short)(slot->linearHoriAdvance>>10) != slot->linearHoriAdvance>>10) + || ((uchar)(info.width) != info.width) + || ((uchar)(info.height) != info.height) + || ((signed char)(info.x) != info.x) + || ((signed char)(info.y) != info.y) + || ((signed char)(info.xOff) != info.xOff)); + + if (large_glyph) { + delete [] glyph_buffer; + return 0; + } + + int pitch = (format == Format_Mono ? ((info.width + 31) & ~31) >> 3 : + (format == Format_A8 ? (info.width + 3) & ~3 : info.width * 4)); + glyph_buffer_size = pitch * info.height; + glyph_buffer = new uchar[glyph_buffer_size]; + + if (slot->format == FT_GLYPH_FORMAT_OUTLINE) { + FT_Bitmap bitmap; + bitmap.rows = info.height*vfactor; + bitmap.width = hpixels; + bitmap.pitch = format == Format_Mono ? (((info.width + 31) & ~31) >> 3) : ((bitmap.width + 3) & ~3); + if (!hsubpixel && vfactor == 1) + bitmap.buffer = glyph_buffer; + else + bitmap.buffer = new uchar[bitmap.rows*bitmap.pitch]; + memset(bitmap.buffer, 0, bitmap.rows*bitmap.pitch); + bitmap.pixel_mode = format == Format_Mono ? FT_PIXEL_MODE_MONO : FT_PIXEL_MODE_GRAY; + FT_Matrix matrix; + matrix.xx = (hsubpixel ? 3 : 1) << 16; + matrix.yy = vfactor << 16; + matrix.yx = matrix.xy = 0; + + FT_Outline_Transform(&slot->outline, &matrix); + FT_Outline_Translate (&slot->outline, (hsubpixel ? -3*left +(4<<6) : -left), -bottom*vfactor); + FT_Outline_Get_Bitmap(library, &slot->outline, &bitmap); + if (hsubpixel) { + Q_ASSERT (bitmap.pixel_mode == FT_PIXEL_MODE_GRAY); + Q_ASSERT(antialias); + uchar *convoluted = new uchar[bitmap.rows*bitmap.pitch]; + bool useLegacyLcdFilter = false; +#if defined(FC_LCD_FILTER) && defined(FT_LCD_FILTER_H) + useLegacyLcdFilter = (lcdFilterType == FT_LCD_FILTER_LEGACY); +#endif + uchar *buffer = bitmap.buffer; + if (!useLegacyLcdFilter) { + convoluteBitmap(bitmap.buffer, convoluted, bitmap.width, info.height, bitmap.pitch); + buffer = convoluted; + } + convertRGBToARGB(buffer + 1, (uint *)glyph_buffer, info.width, info.height, bitmap.pitch, subpixelType != QFontEngineFT::Subpixel_RGB, useLegacyLcdFilter); + delete [] convoluted; + } else if (vfactor != 1) { + convertRGBToARGB_V(bitmap.buffer, (uint *)glyph_buffer, info.width, info.height, bitmap.pitch, subpixelType != QFontEngineFT::Subpixel_VRGB, true); + } + + if (bitmap.buffer != glyph_buffer) + delete [] bitmap.buffer; + } else if (slot->format == FT_GLYPH_FORMAT_BITMAP) { + Q_ASSERT(slot->bitmap.pixel_mode == FT_PIXEL_MODE_MONO); + uchar *src = slot->bitmap.buffer; + uchar *dst = glyph_buffer; + int h = slot->bitmap.rows; + if (format == Format_Mono) { + int bytes = ((info.width + 7) & ~7) >> 3; + while (h--) { + memcpy (dst, src, bytes); + dst += pitch; + src += slot->bitmap.pitch; + } + } else { + if (hsubpixel) { + while (h--) { + uint *dd = (uint *)dst; + *dd++ = 0; + for (int x = 0; x < slot->bitmap.width; x++) { + uint a = ((src[x >> 3] & (0x80 >> (x & 7))) ? 0xffffff : 0x000000); + *dd++ = a; + } + *dd++ = 0; + dst += pitch; + src += slot->bitmap.pitch; + } + } else if (vfactor != 1) { + while (h--) { + uint *dd = (uint *)dst; + for (int x = 0; x < slot->bitmap.width; x++) { + uint a = ((src[x >> 3] & (0x80 >> (x & 7))) ? 0xffffff : 0x000000); + *dd++ = a; + } + dst += pitch; + src += slot->bitmap.pitch; + } + } else { + while (h--) { + for (int x = 0; x < slot->bitmap.width; x++) { + unsigned char a = ((src[x >> 3] & (0x80 >> (x & 7))) ? 0xff : 0x00); + dst[x] = a; + } + dst += pitch; + src += slot->bitmap.pitch; + } + } + } + } else { + qWarning("QFontEngine: Glyph neither outline nor bitmap format=%d", slot->format); + delete [] glyph_buffer; + return 0; + } + } + + + if (!g) { + g = new Glyph; + g->uploadedToServer = false; + g->data = 0; + } + + g->linearAdvance = slot->linearHoriAdvance >> 10; + g->width = info.width; + g->height = info.height; + g->x = -info.x; + g->y = info.y; + g->advance = info.xOff; + g->format = format; + delete [] g->data; + g->data = glyph_buffer; + + if (uploadToServer) { + uploadGlyphToServer(set, glyph, g, &info, glyph_buffer_size); + } + + set->setGlyph(glyph, subPixelPosition, g); + + return g; +} + +bool QFontEngineFT::uploadGlyphToServer(QGlyphSet *set, uint glyphid, Glyph *g, GlyphInfo *info, int glyphDataSize) const +{ + Q_UNUSED(set); + Q_UNUSED(glyphid); + Q_UNUSED(g); + Q_UNUSED(info); + Q_UNUSED(glyphDataSize); + return false; +} + +QFontEngine::FaceId QFontEngineFT::faceId() const +{ + return face_id; +} + +QFontEngine::Properties QFontEngineFT::properties() const +{ + Properties p = freetype->properties(); + if (p.postscriptName.isEmpty()) { + p.postscriptName = QFontEngine::convertToPostscriptFontFamilyName(fontDef.family.toUtf8()); + } + + return freetype->properties(); +} + +QFixed QFontEngineFT::emSquareSize() const +{ + if (FT_IS_SCALABLE(freetype->face)) + return freetype->face->units_per_EM; + else + return freetype->face->size->metrics.y_ppem; +} + +bool QFontEngineFT::getSfntTableData(uint tag, uchar *buffer, uint *length) const +{ + return freetype->getSfntTable(tag, buffer, length); +} + +int QFontEngineFT::synthesized() const +{ + int s = 0; + if ((fontDef.style != QFont::StyleNormal) && !(freetype->face->style_flags & FT_STYLE_FLAG_ITALIC)) + s = SynthesizedItalic; + if ((fontDef.weight == QFont::Bold) && !(freetype->face->style_flags & FT_STYLE_FLAG_BOLD)) + s |= SynthesizedBold; + if (fontDef.stretch != 100 && FT_IS_SCALABLE(freetype->face)) + s |= SynthesizedStretch; + return s; +} + +QFixed QFontEngineFT::ascent() const +{ + return QFixed::fromFixed(metrics.ascender); +} + +QFixed QFontEngineFT::descent() const +{ + // subtract a pixel to work around QFontMetrics's built-in + 1 + return QFixed::fromFixed(-metrics.descender - 64); +} + +QFixed QFontEngineFT::leading() const +{ + return QFixed::fromFixed(metrics.height - metrics.ascender + metrics.descender); +} + +QFixed QFontEngineFT::xHeight() const +{ + TT_OS2 *os2 = (TT_OS2 *)FT_Get_Sfnt_Table(freetype->face, ft_sfnt_os2); + if (os2 && os2->sxHeight) { + lockFace(); + QFixed answer = QFixed(os2->sxHeight*freetype->face->size->metrics.y_ppem)/freetype->face->units_per_EM; + unlockFace(); + return answer; + } + return QFontEngine::xHeight(); +} + +QFixed QFontEngineFT::averageCharWidth() const +{ + TT_OS2 *os2 = (TT_OS2 *)FT_Get_Sfnt_Table(freetype->face, ft_sfnt_os2); + if (os2 && os2->xAvgCharWidth) { + lockFace(); + QFixed answer = QFixed(os2->xAvgCharWidth*freetype->face->size->metrics.x_ppem)/freetype->face->units_per_EM; + unlockFace(); + return answer; + } + return QFontEngine::averageCharWidth(); +} + +qreal QFontEngineFT::maxCharWidth() const +{ + return metrics.max_advance >> 6; +} + +static const ushort char_table[] = { + 40, + 67, + 70, + 75, + 86, + 88, + 89, + 91, + 102, + 114, + 124, + 127, + 205, + 645, + 884, + 922, + 1070, + 12386 +}; + +static const int char_table_entries = sizeof(char_table)/sizeof(ushort); + + +qreal QFontEngineFT::minLeftBearing() const +{ + if (lbearing == SHRT_MIN) + (void) minRightBearing(); // calculates both + return lbearing.toReal(); +} + +qreal QFontEngineFT::minRightBearing() const +{ + if (rbearing == SHRT_MIN) { + lbearing = rbearing = 0; + const QChar *ch = (const QChar *)(const void*)char_table; + QGlyphLayoutArray<char_table_entries> glyphs; + int ng = char_table_entries; + stringToCMap(ch, char_table_entries, &glyphs, &ng, QTextEngine::GlyphIndicesOnly); + while (--ng) { + if (glyphs.glyphs[ng]) { + glyph_metrics_t gi = const_cast<QFontEngineFT *>(this)->boundingBox(glyphs.glyphs[ng]); + lbearing = qMin(lbearing, gi.x); + rbearing = qMin(rbearing, (gi.xoff - gi.x - gi.width)); + } + } + } + return rbearing.toReal(); +} + +QFixed QFontEngineFT::lineThickness() const +{ + return line_thickness; +} + +QFixed QFontEngineFT::underlinePosition() const +{ + return underline_position; +} + +void QFontEngineFT::doKerning(QGlyphLayout *g, QTextEngine::ShaperFlags flags) const +{ + if (!kerning_pairs_loaded) { + kerning_pairs_loaded = true; + lockFace(); + if (freetype->face->size->metrics.x_ppem != 0) { + QFixed scalingFactor(freetype->face->units_per_EM/freetype->face->size->metrics.x_ppem); + unlockFace(); + const_cast<QFontEngineFT *>(this)->loadKerningPairs(scalingFactor); + } else { + unlockFace(); + } + } + QFontEngine::doKerning(g, flags); +} + +QFontEngineFT::QGlyphSet *QFontEngineFT::loadTransformedGlyphSet(const QTransform &matrix) +{ + if (matrix.type() > QTransform::TxShear) + return 0; + + // FT_Set_Transform only supports scalable fonts + if (!FT_IS_SCALABLE(freetype->face)) + return 0; + + FT_Matrix m; + m.xx = FT_Fixed(matrix.m11() * 65536); + m.xy = FT_Fixed(-matrix.m21() * 65536); + m.yx = FT_Fixed(-matrix.m12() * 65536); + m.yy = FT_Fixed(matrix.m22() * 65536); + + QGlyphSet *gs = 0; + + for (int i = 0; i < transformedGlyphSets.count(); ++i) { + const QGlyphSet &g = transformedGlyphSets.at(i); + if (g.transformationMatrix.xx == m.xx + && g.transformationMatrix.xy == m.xy + && g.transformationMatrix.yx == m.yx + && g.transformationMatrix.yy == m.yy) { + + // found a match, move it to the front + transformedGlyphSets.move(i, 0); + gs = &transformedGlyphSets[0]; + break; + } + } + + if (!gs) { + // don't try to load huge fonts + bool draw_as_outline = fontDef.pixelSize * qSqrt(qAbs(matrix.det())) >= 64; + if (draw_as_outline) + return 0; + + // don't cache more than 10 transformations + if (transformedGlyphSets.count() >= 10) { + transformedGlyphSets.move(transformedGlyphSets.size() - 1, 0); + freeServerGlyphSet(transformedGlyphSets.at(0).id); + } else { + transformedGlyphSets.prepend(QGlyphSet()); + } + gs = &transformedGlyphSets[0]; + + gs->clear(); + + gs->id = allocateServerGlyphSet(); + + gs->transformationMatrix = m; + gs->outline_drawing = draw_as_outline; + } + + return gs; +} + +QFixed QFontEngineFT::subPixelPositionForX(QFixed x) +{ + int m_subPixelPositionCount = 4; + if (!supportsSubPixelPositions()) + return 0; + + QFixed subPixelPosition; + if (x != 0) { + subPixelPosition = x - x.floor(); + QFixed fraction = (subPixelPosition / QFixed::fromReal(1.0 / m_subPixelPositionCount)).floor(); + subPixelPosition = fraction / QFixed(m_subPixelPositionCount); + } + return subPixelPosition; +} + +bool QFontEngineFT::loadGlyphs(QGlyphSet *gs, const glyph_t *glyphs, int num_glyphs, + const QFixedPoint *positions, + GlyphFormat format) +{ + FT_Face face = 0; + + for (int i = 0; i < num_glyphs; ++i) { + QFixed spp = subPixelPositionForX(positions[i].x); + Glyph *glyph = gs->getGlyph(glyphs[i], spp); + if (glyph == 0 || glyph->format != format) { + if (!face) { + face = lockFace(); + FT_Matrix m = matrix; + FT_Matrix_Multiply(&gs->transformationMatrix, &m); + FT_Set_Transform(face, &m, 0); + freetype->matrix = m; + } + if (!loadGlyph(gs, glyphs[i], spp, format)) { + unlockFace(); + return false; + } + } + } + + if (face) + unlockFace(); + + return true; +} + +void QFontEngineFT::getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics) +{ + FT_Face face = lockFace(Unscaled); + FT_Set_Transform(face, 0, 0); + FT_Load_Glyph(face, glyph, FT_LOAD_NO_BITMAP); + + int left = face->glyph->metrics.horiBearingX; + int right = face->glyph->metrics.horiBearingX + face->glyph->metrics.width; + int top = face->glyph->metrics.horiBearingY; + int bottom = face->glyph->metrics.horiBearingY - face->glyph->metrics.height; + + QFixedPoint p; + p.x = 0; + p.y = 0; + + metrics->width = QFixed::fromFixed(right-left); + metrics->height = QFixed::fromFixed(top-bottom); + metrics->x = QFixed::fromFixed(left); + metrics->y = QFixed::fromFixed(-top); + metrics->xoff = QFixed::fromFixed(face->glyph->advance.x); + + if (!FT_IS_SCALABLE(freetype->face)) + QFreetypeFace::addBitmapToPath(face->glyph, p, path); + else + QFreetypeFace::addGlyphToPath(face, face->glyph, p, path, face->units_per_EM << 6, face->units_per_EM << 6); + + FT_Set_Transform(face, &freetype->matrix, 0); + unlockFace(); +} + +static inline unsigned int getChar(const QChar *str, int &i, const int len) +{ + unsigned int uc = str[i].unicode(); + if (uc >= 0xd800 && uc < 0xdc00 && i < len-1) { + uint low = str[i+1].unicode(); + if (low >= 0xdc00 && low < 0xe000) { + uc = (uc - 0xd800)*0x400 + (low - 0xdc00) + 0x10000; + ++i; + } + } + return uc; +} + +bool QFontEngineFT::canRender(const QChar *string, int len) +{ + FT_Face face = freetype->face; +#if 0 + if (_cmap != -1) { + lockFace(); + for ( int i = 0; i < len; i++ ) { + unsigned int uc = getChar(string, i, len); + if (!FcCharSetHasChar (_font->charset, uc) && getAdobeCharIndex(face, _cmap, uc) == 0) { + allExist = false; + break; + } + } + unlockFace(); + } else +#endif + { + for ( int i = 0; i < len; i++ ) { + unsigned int uc = getChar(string, i, len); + if (!FT_Get_Char_Index(face, uc)) + return false; + } + } + return true; +} + +void QFontEngineFT::addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags) +{ + if (!glyphs.numGlyphs) + return; + + if (FT_IS_SCALABLE(freetype->face)) { + QFontEngine::addOutlineToPath(x, y, glyphs, path, flags); + } else { + QVarLengthArray<QFixedPoint> positions; + QVarLengthArray<glyph_t> positioned_glyphs; + QTransform matrix; + matrix.translate(x, y); + getGlyphPositions(glyphs, matrix, flags, positioned_glyphs, positions); + + FT_Face face = lockFace(Unscaled); + for (int gl = 0; gl < glyphs.numGlyphs; gl++) { + FT_UInt glyph = positioned_glyphs[gl]; + FT_Load_Glyph(face, glyph, FT_LOAD_TARGET_MONO); + freetype->addBitmapToPath(face->glyph, positions[gl], path); + } + unlockFace(); + } +} + +void QFontEngineFT::addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int numGlyphs, + QPainterPath *path, QTextItem::RenderFlags) +{ + FT_Face face = lockFace(Unscaled); + + for (int gl = 0; gl < numGlyphs; gl++) { + FT_UInt glyph = glyphs[gl]; + + FT_Load_Glyph(face, glyph, FT_LOAD_NO_BITMAP); + + FT_GlyphSlot g = face->glyph; + if (g->format != FT_GLYPH_FORMAT_OUTLINE) + continue; + QFreetypeFace::addGlyphToPath(face, g, positions[gl], path, xsize, ysize); + } + unlockFace(); +} + +bool QFontEngineFT::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, + QTextEngine::ShaperFlags flags) const +{ + if (*nglyphs < len) { + *nglyphs = len; + return false; + } + +#if !defined(QT_NO_FONTCONFIG) + extern QMutex *qt_fontdatabase_mutex(); + QMutex *mtx = 0; +#endif + + bool mirrored = flags & QTextEngine::RightToLeft; + int glyph_pos = 0; + if (freetype->symbol_map) { + FT_Face face = freetype->face; + for ( int i = 0; i < len; ++i ) { + unsigned int uc = getChar(str, i, len); + glyphs->glyphs[glyph_pos] = uc < QFreetypeFace::cmapCacheSize ? freetype->cmapCache[uc] : 0; + if ( !glyphs->glyphs[glyph_pos] ) { + glyph_t glyph; +#if !defined(QT_NO_FONTCONFIG) + if (!mtx) { + mtx = qt_fontdatabase_mutex(); + mtx->lock(); + } + + if (freetype->charset != 0 && FcCharSetHasChar(freetype->charset, uc)) { +#else + if (false) { +#endif + redo0: + glyph = FT_Get_Char_Index(face, uc); + if (!glyph && (uc == 0xa0 || uc == 0x9)) { + uc = 0x20; + goto redo0; + } + } else { + FT_Set_Charmap(face, freetype->symbol_map); + glyph = FT_Get_Char_Index(face, uc); + FT_Set_Charmap(face, freetype->unicode_map); + } + glyphs->glyphs[glyph_pos] = glyph; + if (uc < QFreetypeFace::cmapCacheSize) + freetype->cmapCache[uc] = glyph; + } + ++glyph_pos; + } + } else { + FT_Face face = freetype->face; + for (int i = 0; i < len; ++i) { + unsigned int uc = getChar(str, i, len); + if (mirrored) + uc = QChar::mirroredChar(uc); + glyphs->glyphs[glyph_pos] = uc < QFreetypeFace::cmapCacheSize ? freetype->cmapCache[uc] : 0; + if (!glyphs->glyphs[glyph_pos]) { +#if !defined(QT_NO_FONTCONFIG) + if (!mtx) { + mtx = qt_fontdatabase_mutex(); + mtx->lock(); + } + + if (freetype->charset == 0 || FcCharSetHasChar(freetype->charset, uc)) +#endif + { + redo: + glyph_t glyph = FT_Get_Char_Index(face, uc); + if (!glyph && (uc == 0xa0 || uc == 0x9)) { + uc = 0x20; + goto redo; + } + glyphs->glyphs[glyph_pos] = glyph; + if (uc < QFreetypeFace::cmapCacheSize) + freetype->cmapCache[uc] = glyph; + } + } + ++glyph_pos; + } + } + + *nglyphs = glyph_pos; + glyphs->numGlyphs = glyph_pos; + +#if !defined(QT_NO_FONTCONFIG) + if (mtx) + mtx->unlock(); +#endif + + if (flags & QTextEngine::GlyphIndicesOnly) + return true; + + recalcAdvances(glyphs, flags); + + return true; +} + +void QFontEngineFT::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const +{ + FT_Face face = 0; + bool design = (default_hint_style == HintNone || + default_hint_style == HintLight || + (flags & HB_ShaperFlag_UseDesignMetrics)); + for (int i = 0; i < glyphs->numGlyphs; i++) { + Glyph *g = defaultGlyphSet.getGlyph(glyphs->glyphs[i]); + if (g) { + glyphs->advances_x[i] = design ? QFixed::fromFixed(g->linearAdvance) : QFixed(g->advance); + } else { + if (!face) + face = lockFace(); + g = loadGlyph(glyphs->glyphs[i], 0, Format_None, true); + glyphs->advances_x[i] = design ? QFixed::fromFixed(face->glyph->linearHoriAdvance >> 10) + : QFixed::fromFixed(face->glyph->metrics.horiAdvance).round(); + } + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + glyphs->advances_x[i] = glyphs->advances_x[i].round(); + glyphs->advances_y[i] = 0; + } + if (face) + unlockFace(); +} + +glyph_metrics_t QFontEngineFT::boundingBox(const QGlyphLayout &glyphs) +{ + + FT_Face face = 0; + + glyph_metrics_t overall; + // initialize with line height, we get the same behaviour on all platforms + overall.y = -ascent(); + overall.height = ascent() + descent() + 1; + + QFixed ymax = 0; + QFixed xmax = 0; + for (int i = 0; i < glyphs.numGlyphs; i++) { + Glyph *g = defaultGlyphSet.getGlyph(glyphs.glyphs[i]); + if (!g) { + if (!face) + face = lockFace(); + g = loadGlyph(glyphs.glyphs[i], 0, Format_None, true); + } + if (g) { + QFixed x = overall.xoff + glyphs.offsets[i].x + g->x; + QFixed y = overall.yoff + glyphs.offsets[i].y - g->y; + overall.x = qMin(overall.x, x); + overall.y = qMin(overall.y, y); + xmax = qMax(xmax, x + g->width); + ymax = qMax(ymax, y + g->height); + overall.xoff += qRound(g->advance); + } else { + int left = FLOOR(face->glyph->metrics.horiBearingX); + int right = CEIL(face->glyph->metrics.horiBearingX + face->glyph->metrics.width); + int top = CEIL(face->glyph->metrics.horiBearingY); + int bottom = FLOOR(face->glyph->metrics.horiBearingY - face->glyph->metrics.height); + + QFixed x = overall.xoff + glyphs.offsets[i].x - (-TRUNC(left)); + QFixed y = overall.yoff + glyphs.offsets[i].y - TRUNC(top); + overall.x = qMin(overall.x, x); + overall.y = qMin(overall.y, y); + xmax = qMax(xmax, x + TRUNC(right - left)); + ymax = qMax(ymax, y + TRUNC(top - bottom)); + overall.xoff += qRound(TRUNC(ROUND(face->glyph->advance.x))); + } + } + overall.height = qMax(overall.height, ymax - overall.y); + overall.width = xmax - overall.x; + + if (face) + unlockFace(); + + return overall; +} + +glyph_metrics_t QFontEngineFT::boundingBox(glyph_t glyph) +{ + FT_Face face = 0; + glyph_metrics_t overall; + Glyph *g = defaultGlyphSet.getGlyph(glyph); + if (!g) { + face = lockFace(); + g = loadGlyph(glyph, 0, Format_None, true); + } + if (g) { + overall.x = g->x; + overall.y = -g->y; + overall.width = g->width; + overall.height = g->height; + overall.xoff = g->advance; + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + overall.xoff = overall.xoff.round(); + } else { + int left = FLOOR(face->glyph->metrics.horiBearingX); + int right = CEIL(face->glyph->metrics.horiBearingX + face->glyph->metrics.width); + int top = CEIL(face->glyph->metrics.horiBearingY); + int bottom = FLOOR(face->glyph->metrics.horiBearingY - face->glyph->metrics.height); + + overall.width = TRUNC(right-left); + overall.height = TRUNC(top-bottom); + overall.x = TRUNC(left); + overall.y = -TRUNC(top); + overall.xoff = TRUNC(ROUND(face->glyph->advance.x)); + } + if (face) + unlockFace(); + return overall; +} + +glyph_metrics_t QFontEngineFT::boundingBox(glyph_t glyph, const QTransform &matrix) +{ + return alphaMapBoundingBox(glyph, 0, matrix, QFontEngine::Format_None); +} + +glyph_metrics_t QFontEngineFT::alphaMapBoundingBox(glyph_t glyph, QFixed subPixelPosition, const QTransform &matrix, QFontEngine::GlyphFormat format) +{ + FT_Face face = 0; + glyph_metrics_t overall; + QGlyphSet *glyphSet = 0; + if (matrix.type() > QTransform::TxTranslate && FT_IS_SCALABLE(freetype->face)) { + // TODO move everything here to a method of its own to access glyphSets + // to be shared with a new method that will replace loadTransformedGlyphSet() + FT_Matrix m; + m.xx = FT_Fixed(matrix.m11() * 65536); + m.xy = FT_Fixed(-matrix.m21() * 65536); + m.yx = FT_Fixed(-matrix.m12() * 65536); + m.yy = FT_Fixed(matrix.m22() * 65536); + for (int i = 0; i < transformedGlyphSets.count(); ++i) { + const QGlyphSet &g = transformedGlyphSets.at(i); + if (g.transformationMatrix.xx == m.xx + && g.transformationMatrix.xy == m.xy + && g.transformationMatrix.yx == m.yx + && g.transformationMatrix.yy == m.yy) { + + // found a match, move it to the front + transformedGlyphSets.move(i, 0); + glyphSet = &transformedGlyphSets[0]; + break; + } + } + + if (!glyphSet) { + // don't cache more than 10 transformations + if (transformedGlyphSets.count() >= 10) { + transformedGlyphSets.move(transformedGlyphSets.size() - 1, 0); + freeServerGlyphSet(transformedGlyphSets.at(0).id); + } else { + transformedGlyphSets.prepend(QGlyphSet()); + } + glyphSet = &transformedGlyphSets[0]; + glyphSet->clear(); + glyphSet->id = allocateServerGlyphSet(); + glyphSet->transformationMatrix = m; + } + Q_ASSERT(glyphSet); + } else { + glyphSet = &defaultGlyphSet; + } + Glyph * g = glyphSet->getGlyph(glyph); + if (!g || g->format != format) { + face = lockFace(); + FT_Matrix m = this->matrix; + FT_Matrix_Multiply(&glyphSet->transformationMatrix, &m); + freetype->matrix = m; + g = loadGlyph(glyphSet, glyph, subPixelPosition, format); + } + + if (g) { + overall.x = g->x; + overall.y = -g->y; + overall.width = g->width; + overall.height = g->height; + overall.xoff = g->advance; + } else { + int left = FLOOR(face->glyph->metrics.horiBearingX); + int right = CEIL(face->glyph->metrics.horiBearingX + face->glyph->metrics.width); + int top = CEIL(face->glyph->metrics.horiBearingY); + int bottom = FLOOR(face->glyph->metrics.horiBearingY - face->glyph->metrics.height); + + overall.width = TRUNC(right-left); + overall.height = TRUNC(top-bottom); + overall.x = TRUNC(left); + overall.y = -TRUNC(top); + overall.xoff = TRUNC(ROUND(face->glyph->advance.x)); + } + if (face) + unlockFace(); + return overall; +} + +QImage QFontEngineFT::alphaMapForGlyph(glyph_t g, QFixed subPixelPosition) +{ + lockFace(); + + GlyphFormat glyph_format = antialias ? Format_A8 : Format_Mono; + + Glyph *glyph = defaultGlyphSet.outline_drawing ? 0 : loadGlyph(g, subPixelPosition, glyph_format); + if (!glyph) { + unlockFace(); + return QFontEngine::alphaMapForGlyph(g); + } + + const int pitch = antialias ? (glyph->width + 3) & ~3 : ((glyph->width + 31)/32) * 4; + + QImage img(glyph->width, glyph->height, antialias ? QImage::Format_Indexed8 : QImage::Format_Mono); + if (antialias) { + QVector<QRgb> colors(256); + for (int i=0; i<256; ++i) + colors[i] = qRgba(0, 0, 0, i); + img.setColorTable(colors); + } else { + QVector<QRgb> colors(2); + colors[0] = qRgba(0, 0, 0, 0); + colors[1] = qRgba(0, 0, 0, 255); + img.setColorTable(colors); + } + Q_ASSERT(img.bytesPerLine() == pitch); + if (glyph->width) { + for (int y = 0; y < glyph->height; ++y) + memcpy(img.scanLine(y), &glyph->data[y * pitch], pitch); + } + unlockFace(); + + return img; +} + +QImage QFontEngineFT::alphaRGBMapForGlyph(glyph_t g, QFixed subPixelPosition, int margin, const QTransform &t) +{ + if (t.type() > QTransform::TxTranslate) + return QFontEngine::alphaRGBMapForGlyph(g, subPixelPosition, margin, t); + + lockFace(); + + GlyphFormat glyph_format = Format_A32; + + Glyph *glyph = defaultGlyphSet.outline_drawing ? 0 : loadGlyph(g, subPixelPosition, glyph_format); + if (!glyph) { + unlockFace(); + return QFontEngine::alphaRGBMapForGlyph(g, subPixelPosition, margin, t); + } + + QImage img(glyph->width, glyph->height, QImage::Format_RGB32); + memcpy(img.bits(), glyph->data, 4 * glyph->width * glyph->height); + unlockFace(); + + return img; +} + +void QFontEngineFT::removeGlyphFromCache(glyph_t glyph) +{ + defaultGlyphSet.removeGlyphFromCache(glyph, 0); +} + +int QFontEngineFT::glyphCount() const +{ + int count = 0; + FT_Face face = lockFace(); + if (face) { + count = face->num_glyphs; + unlockFace(); + } + return count; +} + +FT_Face QFontEngineFT::lockFace(Scaling scale) const +{ + freetype->lock(); + FT_Face face = freetype->face; + if (scale == Unscaled) { + FT_Set_Char_Size(face, face->units_per_EM << 6, face->units_per_EM << 6, 0, 0); + freetype->xsize = face->units_per_EM << 6; + freetype->ysize = face->units_per_EM << 6; + } else if (freetype->xsize != xsize || freetype->ysize != ysize) { + FT_Set_Char_Size(face, xsize, ysize, 0, 0); + freetype->xsize = xsize; + freetype->ysize = ysize; + } + if (freetype->matrix.xx != matrix.xx || + freetype->matrix.yy != matrix.yy || + freetype->matrix.xy != matrix.xy || + freetype->matrix.yx != matrix.yx) { + freetype->matrix = matrix; + FT_Set_Transform(face, &freetype->matrix, 0); + } + + return face; +} + +void QFontEngineFT::unlockFace() const +{ + freetype->unlock(); +} + +FT_Face QFontEngineFT::non_locked_face() const +{ + return freetype->face; +} + + +QFontEngineFT::QGlyphSet::QGlyphSet() + : id(0), outline_drawing(false) +{ + transformationMatrix.xx = 0x10000; + transformationMatrix.yy = 0x10000; + transformationMatrix.xy = 0; + transformationMatrix.yx = 0; + memset(fast_glyph_data, 0, sizeof(fast_glyph_data)); + fast_glyph_count = 0; +} + +QFontEngineFT::QGlyphSet::~QGlyphSet() +{ + clear(); +} + +void QFontEngineFT::QGlyphSet::clear() +{ + if (fast_glyph_count > 0) { + for (int i = 0; i < 256; ++i) { + if (fast_glyph_data[i]) { + delete fast_glyph_data[i]; + fast_glyph_data[i] = 0; + } + } + fast_glyph_count = 0; + } + qDeleteAll(glyph_data); + glyph_data.clear(); +} + +void QFontEngineFT::QGlyphSet::removeGlyphFromCache(glyph_t index, QFixed subPixelPosition) +{ + if (useFastGlyphData(index, subPixelPosition)) { + if (fast_glyph_data[index]) { + delete fast_glyph_data[index]; + fast_glyph_data[index] = 0; + if (fast_glyph_count > 0) + --fast_glyph_count; + } + } else { + delete glyph_data.take(GlyphAndSubPixelPosition(index, subPixelPosition)); + } +} + +void QFontEngineFT::QGlyphSet::setGlyph(glyph_t index, QFixed subPixelPosition, Glyph *glyph) +{ + if (useFastGlyphData(index, subPixelPosition)) { + if (!fast_glyph_data[index]) + ++fast_glyph_count; + fast_glyph_data[index] = glyph; + } else { + glyph_data.insert(GlyphAndSubPixelPosition(index, subPixelPosition), glyph); + } +} + +unsigned long QFontEngineFT::allocateServerGlyphSet() +{ + return 0; +} + +void QFontEngineFT::freeServerGlyphSet(unsigned long id) +{ + Q_UNUSED(id); +} + +HB_Error QFontEngineFT::getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints) +{ + lockFace(); + bool hsubpixel = true; + int vfactor = 1; + int load_flags = loadFlags(0, Format_A8, flags, hsubpixel, vfactor); + HB_Error result = freetype->getPointInOutline(glyph, load_flags, point, xpos, ypos, nPoints); + unlockFace(); + return result; +} + +QT_END_NAMESPACE + +#endif // QT_NO_FREETYPE |