diff options
author | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2015-12-03 03:54:21 +0000 |
---|---|---|
committer | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2015-12-03 03:54:21 +0000 |
commit | d8497022d7566dfeaca92ed7db1af58412409dae (patch) | |
tree | b19d210773d987df75686d720505c687b95db6f4 /Build/source/texk/dvisvgm/dvisvgm-1.11/src/FontEngine.cpp | |
parent | dfaf3df32ca4a228b4bd4e44f6cb3c040b206a69 (diff) |
Import dvisvgm 1.12.
git-svn-id: svn://tug.org/texlive/trunk@39005 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.11/src/FontEngine.cpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.11/src/FontEngine.cpp | 414 |
1 files changed, 0 insertions, 414 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.11/src/FontEngine.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.11/src/FontEngine.cpp deleted file mode 100644 index 633be5514db..00000000000 --- a/Build/source/texk/dvisvgm/dvisvgm-1.11/src/FontEngine.cpp +++ /dev/null @@ -1,414 +0,0 @@ -/************************************************************************* -** FontEngine.cpp ** -** ** -** This file is part of dvisvgm -- the DVI to SVG converter ** -** Copyright (C) 2005-2015 Martin Gieseking <martin.gieseking@uos.de> ** -** ** -** This program is free software; you can redistribute it and/or ** -** modify it under the terms of the GNU General Public License as ** -** published by the Free Software Foundation; either version 3 of ** -** the License, or (at your option) any later version. ** -** ** -** This program is distributed in the hope that it will be useful, but ** -** WITHOUT ANY WARRANTY; without even the implied warranty of ** -** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** -** GNU General Public License for more details. ** -** ** -** You should have received a copy of the GNU General Public License ** -** along with this program; if not, see <http://www.gnu.org/licenses/>. ** -*************************************************************************/ - -#include <config.h> -#include <iostream> -#include <sstream> -#include <ft2build.h> -#include FT_ADVANCES_H -#include FT_GLYPH_H -#include FT_OUTLINE_H -#include FT_TRUETYPE_TABLES_H -#include FT_TYPES_H -#include "Font.h" -#include "FontEngine.h" -#include "FontStyle.h" -#include "Message.h" - -using namespace std; - - -/** Converts a floating point value to a 16.16 fixed point value. */ -static inline FT_Fixed to_16dot16 (double val) { - return static_cast<FT_Fixed>(val*65536.0 + 0.5); -} - - -/** Converts an integer to a 16.16 fixed point value. */ -static inline FT_Fixed to_16dot16 (int val) { - return static_cast<FT_Fixed>(val) << 16; -} - - -/////////////////////////////////////////////////////////////////////////// - - -FontEngine::FontEngine () : _currentFace(0), _currentFont(0) -{ - _currentChar = _currentGlyphIndex = 0; - _horDeviceRes = _vertDeviceRes = 300; - if (FT_Init_FreeType(&_library)) - Message::estream(true) << "FontEngine: error initializing FreeType library\n"; -} - - -FontEngine::~FontEngine () { - if (_currentFace && FT_Done_Face(_currentFace)) - Message::estream(true) << "FontEngine: error removing glyph\n"; - if (FT_Done_FreeType(_library)) - Message::estream(true) << "FontEngine: error removing FreeType library\n"; -} - - -/** Returns the singleton instance of this class. */ -FontEngine& FontEngine::instance () { - static FontEngine engine; - return engine; -} - - -string FontEngine::version () { - FT_Int major, minor, patch; - FT_Library &lib = instance()._library; - FT_Library_Version(lib, &major, &minor, &patch); - ostringstream oss; - oss << major << '.' << minor << '.' << patch; - return oss.str(); -} - - -void FontEngine::setDeviceResolution (int x, int y) { - _horDeviceRes = x; - _vertDeviceRes = y; -} - - -/** Sets the font to be used. - * @param[in] fname path to font file - * @param[in] fontindex index of font in font collection (multi-font files, like TTC) - * @return true on success */ -bool FontEngine::setFont (const string &fname, int fontindex, const CharMapID &charMapID) { - if (_currentFace && FT_Done_Face(_currentFace)) - Message::estream(true) << "FontEngine: error removing font\n"; - if (FT_New_Face(_library, fname.c_str(), fontindex, &_currentFace)) { - Message::estream(true) << "FontEngine: error reading file " << fname << '\n'; - return false; - } - if (charMapID.valid()) - setCharMap(charMapID); - return true; -} - - -bool FontEngine::setFont (const Font &font) { - if (!_currentFont || _currentFont->name() != font.name()) { - const PhysicalFont *pf = dynamic_cast<const PhysicalFont*>(&font); - _currentFont = &font; - return setFont(font.path(), font.fontIndex(), pf ? pf->getCharMapID() : CharMapID()); - } - return true; -} - - -bool FontEngine::isCIDFont() const { - FT_Bool cid_keyed; - return FT_Get_CID_Is_Internally_CID_Keyed(_currentFace, &cid_keyed) == 0 && cid_keyed; -} - - -bool FontEngine::setCharMap (const CharMapID &charMapID) { - for (int i=0; i < _currentFace->num_charmaps; i++) { - FT_CharMap ft_cmap = _currentFace->charmaps[i]; - if (ft_cmap->platform_id == charMapID.platform_id && ft_cmap->encoding_id == charMapID.encoding_id) { - FT_Set_Charmap(_currentFace, ft_cmap); - return true; - } - } - return false; -} - - -/** Returns a character map that maps from character indexes to character codes - * of the current encoding. - * @param[out] charmap the resulting charmap */ -void FontEngine::buildCharMap (RangeMap &charmap) { - charmap.clear(); - FT_UInt glyph_index; - UInt32 charcode = FT_Get_First_Char(_currentFace, &glyph_index); - while (glyph_index) { - charmap.addRange(glyph_index, glyph_index, charcode); - charcode = FT_Get_Next_Char(_currentFace, charcode, &glyph_index); - } -} - - -/** Creates a charmap that maps from the custom character encoding to unicode. - * @return pointer to charmap if it could be created, 0 otherwise */ -const RangeMap* FontEngine::createCustomToUnicodeMap () { - FT_CharMap ftcharmap = _currentFace->charmap; - if (FT_Select_Charmap(_currentFace, FT_ENCODING_ADOBE_CUSTOM) != 0) - return 0; - RangeMap index_to_source_chrcode; - buildCharMap(index_to_source_chrcode); - if (FT_Select_Charmap(_currentFace, FT_ENCODING_UNICODE) != 0) - return 0; - RangeMap *charmap = new RangeMap; - FT_UInt glyph_index; - UInt32 unicode_point = FT_Get_First_Char(_currentFace, &glyph_index); - while (glyph_index) { - UInt32 custom_charcode = index_to_source_chrcode.valueAt(glyph_index); - charmap->addRange(custom_charcode, custom_charcode, unicode_point); - unicode_point = FT_Get_Next_Char(_currentFace, unicode_point, &glyph_index); - } - FT_Set_Charmap(_currentFace, ftcharmap); - return charmap; -} - - -const char* FontEngine::getFamilyName () const { - return _currentFace ? _currentFace->family_name : 0; -} - - -const char* FontEngine::getStyleName () const { - return _currentFace ? _currentFace->style_name : 0; -} - - -int FontEngine::getUnitsPerEM () const { - return _currentFace ? _currentFace->units_per_EM : 0; -} - - -/** Returns the ascender of the current font in font units. */ -int FontEngine::getAscender () const { - return _currentFace ? _currentFace->ascender : 0; -} - - -/** Returns the descender of the current font in font units. */ -int FontEngine::getDescender () const { - return _currentFace ? _currentFace->descender : 0; -} - - -int FontEngine::getAdvance (int c) const { - if (_currentFace) { - FT_Fixed adv=0; - FT_Get_Advance(_currentFace, c, FT_LOAD_NO_SCALE, &adv); - return adv; - } - return 0; -} - - -int FontEngine::getHAdvance () const { - if (_currentFace) { - TT_OS2 *table = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(_currentFace, ft_sfnt_os2)); - return table ? table->xAvgCharWidth : 0; - } - return 0; -} - - -int FontEngine::getHAdvance (const Character &c) const { - if (_currentFace) { - FT_Load_Glyph(_currentFace, charIndex(c), FT_LOAD_NO_SCALE); - return _currentFace->glyph->metrics.horiAdvance; - } - return 0; -} - - -int FontEngine::getVAdvance (const Character &c) const { - if (_currentFace) { - FT_Load_Glyph(_currentFace, charIndex(c), FT_LOAD_NO_SCALE); - if (FT_HAS_VERTICAL(_currentFace)) - return _currentFace->glyph->metrics.vertAdvance; - return _currentFace->glyph->metrics.horiAdvance; - } - return 0; -} - - -int FontEngine::charIndex (const Character &c) const { - switch (c.type()) { - case Character::CHRCODE: - return FT_Get_Char_Index(_currentFace, (FT_ULong)c.number()); - case Character::NAME: - return FT_Get_Name_Index(_currentFace, (FT_String*)c.name()); - default: - return c.number(); - } -} - - -/** Get first available character of the current font face. */ -int FontEngine::getFirstChar () const { - if (_currentFace) - return _currentChar = FT_Get_First_Char(_currentFace, &_currentGlyphIndex); - return 0; -} - - -/** Get the next available character of the current font face. */ -int FontEngine::getNextChar () const { - if (_currentFace && _currentGlyphIndex) - return _currentChar = FT_Get_Next_Char(_currentFace, _currentChar, &_currentGlyphIndex); - return getFirstChar(); -} - - -/** Returns the number of glyphs present in the current font face. */ -int FontEngine::getNumGlyphs () const { - return _currentFace ? _currentFace->num_glyphs : 0; -} - - -/** Returns the glyph name for a given charater code. - * @param[in] c char code - * @return glyph name */ -string FontEngine::getGlyphName (const Character &c) const { - if (c.type() == Character::NAME) - return c.name(); - - if (_currentFace && FT_HAS_GLYPH_NAMES(_currentFace)) { - char buf[256]; - FT_Get_Glyph_Name(_currentFace, charIndex(c), buf, 256); - return string(buf); - } - return ""; -} - - -vector<int> FontEngine::getPanose () const { - vector<int> panose(10); - if (_currentFace) { - TT_OS2 *table = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(_currentFace, ft_sfnt_os2)); - if (table) - for (int i=0; i < 10; i++) - panose[i] = table->panose[i]; - } - return panose; -} - - -int FontEngine::getCharMapIDs (vector<CharMapID> &charmapIDs) const { - charmapIDs.clear(); - if (_currentFace) { - for (int i=0; i < _currentFace->num_charmaps; i++) { - FT_CharMap charmap = _currentFace->charmaps[i]; - charmapIDs.push_back(CharMapID(charmap->platform_id, charmap->encoding_id)); - } - } - return charmapIDs.size(); -} - - -CharMapID FontEngine::setUnicodeCharMap () { - if (_currentFace && FT_Select_Charmap(_currentFace, FT_ENCODING_UNICODE) == 0) - return CharMapID(_currentFace->charmap->platform_id, _currentFace->charmap->encoding_id); - return CharMapID(); -} - - -CharMapID FontEngine::setCustomCharMap () { - if (_currentFace && FT_Select_Charmap(_currentFace, FT_ENCODING_ADOBE_CUSTOM) == 0) - return CharMapID(_currentFace->charmap->platform_id, _currentFace->charmap->encoding_id); - return CharMapID(); -} - - -// handle API change in freetype version 2.2.1 -#if FREETYPE_MAJOR > 2 || (FREETYPE_MAJOR == 2 && (FREETYPE_MINOR > 2 || (FREETYPE_MINOR == 2 && FREETYPE_PATCH >= 1))) - typedef const FT_Vector *FTVectorPtr; -#else - typedef FT_Vector *FTVectorPtr; -#endif - - -// Callback functions used by trace_outline/FT_Outline_Decompose -static int moveto (FTVectorPtr to, void *user) { - Glyph *glyph = static_cast<Glyph*>(user); - glyph->moveto(to->x, to->y); - return 0; -} - - -static int lineto (FTVectorPtr to, void *user) { - Glyph *glyph = static_cast<Glyph*>(user); - glyph->lineto(to->x, to->y); - return 0; -} - - -static int conicto (FTVectorPtr control, FTVectorPtr to, void *user) { - Glyph *glyph = static_cast<Glyph*>(user); - glyph->conicto(control->x, control->y, to->x, to->y); - return 0; -} - - -static int cubicto (FTVectorPtr control1, FTVectorPtr control2, FTVectorPtr to, void *user) { - Glyph *glyph = static_cast<Glyph*>(user); - glyph->cubicto(control1->x, control1->y, control2->x, control2->y, to->x, to->y); - return 0; -} - - -/** Traces the outline of a glyph by calling the corresponding "drawing" functions. - * Each glyph is composed of straight lines, quadratic (conic) or cubic B�zier curves. - * This function creates a Glyph object representing these graphics segments. - * @param[in] face FreeType object representing the font to scan - * @param[in] font corresponding Font object providing additional data - * @param[in] index index of the glyph to be traced - * @param[out] glyph resulting Glyph object containing the graphics segments - * @param[in] scale if true the current pt size will be considered otherwise the plain TrueType units are used. - * @return false on errors */ -static bool trace_outline (FT_Face face, const Font *font, int index, Glyph &glyph, bool scale) { - if (face) { - if (FT_Load_Glyph(face, index, scale ? FT_LOAD_DEFAULT : FT_LOAD_NO_SCALE)) { - Message::estream(true) << "can't load glyph " << int(index) << '\n'; - return false; - } - if (face->glyph->format != FT_GLYPH_FORMAT_OUTLINE) { - Message::estream(true) << "no outlines found in glyph " << int(index) << '\n'; - return false; - } - FT_Outline outline = face->glyph->outline; - // apply style parameters if set - if (const FontStyle *style = font->style()) { - FT_Matrix matrix = {to_16dot16(style->extend), to_16dot16(style->slant), 0, to_16dot16(1)}; - FT_Outline_Transform(&outline, &matrix); - if (style->bold != 0) - FT_Outline_Embolden(&outline, style->bold/font->scaledSize()*face->units_per_EM); - } - const FT_Outline_Funcs funcs = {moveto, lineto, conicto, cubicto, 0, 0}; - FT_Outline_Decompose(&outline, &funcs, &glyph); - return true; - } - Message::wstream(true) << "FontEngine: can't trace outline, no font face selected\n"; - return false; -} - - -/** Traces the outline of a glyph by calling the corresponding "drawing" functions. - * Each glyph is composed of straight lines, quadratic (conic) or cubic B�zier curves. - * This function creates a Glyph object representing these graphics segments. - * @param[in] c the glyph of this character will be traced - * @param[out] glyph resulting Glyph object containing the graphics segments - * @param[in] scale if true the current pt size will be considered otherwise the plain TrueType units are used. - * @return false on errors */ -bool FontEngine::traceOutline (const Character &c, Glyph &glyph, bool scale) const { - if (_currentFace) - return trace_outline(_currentFace, _currentFont, charIndex(c), glyph, scale); - Message::wstream(true) << "FontEngine: can't trace outline, no font face selected\n"; - return false; -} |