Linus Unnebäck
8 years ago
committed by
GitHub
GitHub
16 changed files with 575 additions and 582 deletions
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//
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// FontFace.cc
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//
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// Copyright (c) 2012 Julian Viereck <julian.viereck@gmail.com>
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//
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#include "FontFace.h" |
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#include <fontconfig/fontconfig.h> |
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Nan::Persistent<FunctionTemplate> FontFace::constructor; |
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/*
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* Destroy ft_face. |
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*/ |
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FontFace::~FontFace() { |
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// Decrement extra reference count added in ::New(...).
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// Once there is no reference left to crFace, cairo will release the
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// free type font face as well.
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cairo_font_face_destroy(_crFace); |
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} |
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/*
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* Initialize FontFace. |
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*/ |
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void |
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FontFace::Initialize(Nan::ADDON_REGISTER_FUNCTION_ARGS_TYPE target) { |
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Nan::HandleScope scope; |
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// Constructor
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Local<FunctionTemplate> ctor = Nan::New<FunctionTemplate>(FontFace::New); |
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constructor.Reset(ctor); |
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ctor->InstanceTemplate()->SetInternalFieldCount(1); |
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ctor->SetClassName(Nan::New("FontFace").ToLocalChecked()); |
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// Prototype
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Nan::Set(target, Nan::New("FontFace").ToLocalChecked(), ctor->GetFunction()); |
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} |
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/*
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* Initialize a new FontFace object. |
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*/ |
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FT_Library library; /* handle to library */ |
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bool FontFace::_initLibrary = true; |
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static cairo_user_data_key_t key; |
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/*
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* Initialize a new FontFace. |
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*/ |
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NAN_METHOD(FontFace::New) { |
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if (!info.IsConstructCall()) { |
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return Nan::ThrowTypeError("Class constructors cannot be invoked without 'new'"); |
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} |
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if (!info[0]->IsString() |
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|| !info[1]->IsNumber()) { |
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return Nan::ThrowError("Wrong argument types passed to FontFace constructor"); |
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} |
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String::Utf8Value filePath(info[0]); |
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int faceIdx = int(info[1]->NumberValue()); |
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FT_Face ftFace; |
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FT_Error ftError; |
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cairo_font_face_t *crFace; |
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if (_initLibrary) { |
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_initLibrary = false; |
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ftError = FT_Init_FreeType(&library); |
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if (ftError) { |
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return Nan::ThrowError("Could not load library"); |
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} |
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} |
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// Create new freetype font face.
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ftError = FT_New_Face(library, *filePath, faceIdx, &ftFace); |
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if (ftError) { |
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return Nan::ThrowError("Could not load font file"); |
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} |
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#if HAVE_PANGO |
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// Load the font file in fontconfig
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FcBool ok = FcConfigAppFontAddFile(FcConfigGetCurrent(), (FcChar8 *)(*filePath)); |
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if (!ok) { |
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return Nan::ThrowError("Could not load font in FontConfig"); |
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} |
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#endif |
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// Create new cairo font face.
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crFace = cairo_ft_font_face_create_for_ft_face(ftFace, 0); |
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// If the cairo font face is released, release the FreeType font face as well.
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int status = cairo_font_face_set_user_data (crFace, &key, |
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ftFace, (cairo_destroy_func_t) FT_Done_Face); |
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if (status) { |
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cairo_font_face_destroy (crFace); |
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FT_Done_Face (ftFace); |
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return Nan::ThrowError("Failed to setup cairo font face user data"); |
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} |
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// Explicit reference count the cairo font face. Otherwise the font face might
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// get released by cairo although the JS font face object is still alive.
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cairo_font_face_reference(crFace); |
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FontFace *face = new FontFace(crFace); |
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face->Wrap(info.This()); |
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info.GetReturnValue().Set(info.This()); |
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} |
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//
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// FontFace.h
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//
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// Copyright (c) 2012 Julian Viereck <julian.viereck@gmail.com>
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//
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#ifndef __NODE_TRUE_TYPE_FONT_FACE_H__ |
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#define __NODE_TRUE_TYPE_FONT_FACE_H__ |
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#include "Canvas.h" |
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#include <ft2build.h> |
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#include <cairo-ft.h> |
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#include FT_FREETYPE_H |
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class FontFace: public Nan::ObjectWrap { |
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public: |
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static Nan::Persistent<FunctionTemplate> constructor; |
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static void Initialize(Nan::ADDON_REGISTER_FUNCTION_ARGS_TYPE target); |
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static NAN_METHOD(New); |
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FontFace(cairo_font_face_t *crFace) |
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:_crFace(crFace) {} |
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inline cairo_font_face_t *cairoFace(){ return _crFace; } |
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private: |
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~FontFace(); |
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cairo_font_face_t *_crFace; |
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static bool _initLibrary; |
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}; |
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#endif |
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@ -0,0 +1,251 @@ |
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#include <pango/pangocairo.h> |
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#include <pango/pango-fontmap.h> |
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#include <pango/pango.h> |
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#ifdef __APPLE__ |
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#include <CoreText/CoreText.h> |
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#elif defined(_WIN32) |
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#include <windows.h> |
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#else |
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#include <fontconfig/fontconfig.h> |
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#endif |
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#include <ft2build.h> |
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#include FT_FREETYPE_H |
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#include FT_TRUETYPE_TABLES_H |
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#include FT_SFNT_NAMES_H |
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#include FT_TRUETYPE_IDS_H |
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#ifndef FT_SFNT_OS2 |
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#define FT_SFNT_OS2 ft_sfnt_os2 |
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#endif |
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// OSX seems to read the strings in MacRoman encoding and ignore Unicode entries.
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// You can verify this by opening a TTF with both Unicode and Macroman on OSX.
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// It uses the MacRoman name, while Fontconfig and Windows use Unicode
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#ifdef __APPLE__ |
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#define PREFERRED_PLATFORM_ID TT_PLATFORM_MACINTOSH |
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#define PREFERRED_ENCODING_ID TT_MAC_ID_ROMAN |
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#else |
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#define PREFERRED_PLATFORM_ID TT_PLATFORM_MICROSOFT |
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#define PREFERRED_ENCODING_ID TT_MS_ID_UNICODE_CS |
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#endif |
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#define IS_PREFERRED_ENC(X) \ |
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X.platform_id == PREFERRED_PLATFORM_ID && X.encoding_id == PREFERRED_ENCODING_ID |
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#define GET_NAME_RANK(X) \ |
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(IS_PREFERRED_ENC(X) ? 1 : 0) + (X.name_id == TT_NAME_ID_PREFERRED_FAMILY ? 1 : 0) |
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/*
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* Return a UTF-8 encoded string given a TrueType name buf+len |
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* and its platform and encoding |
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*/ |
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char * |
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to_utf8(FT_Byte* buf, FT_UInt len, FT_UShort pid, FT_UShort eid) { |
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size_t ret_len = len * 4; // max chars in a utf8 string
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char *ret = (char*)malloc(ret_len + 1); // utf8 string + null
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if (!ret) return NULL; |
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// In my testing of hundreds of fonts from the Google Font repo, the two types
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// of fonts are TT_PLATFORM_MICROSOFT with TT_MS_ID_UNICODE_CS encoding, or
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// TT_PLATFORM_MACINTOSH with TT_MAC_ID_ROMAN encoding. Usually both, never neither
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char const *fromcode; |
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if (pid == TT_PLATFORM_MACINTOSH && eid == TT_MAC_ID_ROMAN) { |
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fromcode = "MAC"; |
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} else if (pid == TT_PLATFORM_MICROSOFT && eid == TT_MS_ID_UNICODE_CS) { |
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fromcode = "UTF-16BE"; |
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} else { |
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free(ret); |
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return NULL; |
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} |
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GIConv cd = g_iconv_open("UTF-8", fromcode); |
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if (cd == (GIConv)-1) { |
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free(ret); |
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return NULL; |
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} |
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size_t inbytesleft = len; |
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size_t outbytesleft = ret_len; |
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size_t n_converted = g_iconv(cd, (char**)&buf, &inbytesleft, &ret, &outbytesleft); |
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ret -= ret_len - outbytesleft; // rewind the pointers to their
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buf -= len - inbytesleft; // original starting positions
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if (n_converted == (size_t)-1) { |
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free(ret); |
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return NULL; |
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} else { |
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ret[ret_len - outbytesleft] = '\0'; |
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return ret; |
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} |
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} |
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/*
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* Find a family name in the face's name table, preferring the one the |
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* system, fall back to the other |
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*/ |
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typedef struct _NameDef { |
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const char *buf; |
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int rank; // the higher the more desirable
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} NameDef; |
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gint |
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_name_def_compare(gconstpointer a, gconstpointer b) { |
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return ((NameDef*)a)->rank > ((NameDef*)b)->rank ? -1 : 1; |
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} |
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// Some versions of GTK+ do not have this, particualrly the one we
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// currently link to in node-canvas's wiki
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void |
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_free_g_list_item(gpointer data, gpointer user_data) { |
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NameDef *d = (NameDef *)data; |
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free((void *)(d->buf)); |
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} |
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void |
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_g_list_free_full(GList *list) { |
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g_list_foreach(list, _free_g_list_item, NULL); |
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g_list_free(list); |
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} |
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char * |
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get_family_name(FT_Face face) { |
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FT_SfntName name; |
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GList *list = NULL; |
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char *utf8name = NULL; |
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for (unsigned i = 0; i < FT_Get_Sfnt_Name_Count(face); ++i) { |
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FT_Get_Sfnt_Name(face, i, &name); |
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if (name.name_id == TT_NAME_ID_FONT_FAMILY || name.name_id == TT_NAME_ID_PREFERRED_FAMILY) { |
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char *buf = to_utf8(name.string, name.string_len, name.platform_id, name.encoding_id); |
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if (buf) { |
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NameDef *d = (NameDef*)malloc(sizeof(NameDef)); |
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d->buf = (const char*)buf; |
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d->rank = GET_NAME_RANK(name); |
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list = g_list_insert_sorted(list, (gpointer)d, _name_def_compare); |
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} |
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} |
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} |
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GList *best_def = g_list_first(list); |
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if (best_def) utf8name = (char*) strdup(((NameDef*)best_def->data)->buf); |
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if (list) _g_list_free_full(list); |
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return utf8name; |
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} |
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PangoWeight |
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get_pango_weight(FT_UShort weight) { |
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switch (weight) { |
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case 100: return PANGO_WEIGHT_THIN; |
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case 200: return PANGO_WEIGHT_ULTRALIGHT; |
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case 300: return PANGO_WEIGHT_LIGHT; |
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#if PANGO_VERSION >= PANGO_VERSION_ENCODE(1, 36, 7) |
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case 350: return PANGO_WEIGHT_SEMILIGHT; |
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#endif |
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case 380: return PANGO_WEIGHT_BOOK; |
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case 400: return PANGO_WEIGHT_NORMAL; |
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case 500: return PANGO_WEIGHT_MEDIUM; |
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case 600: return PANGO_WEIGHT_SEMIBOLD; |
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case 700: return PANGO_WEIGHT_BOLD; |
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case 800: return PANGO_WEIGHT_ULTRABOLD; |
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case 900: return PANGO_WEIGHT_HEAVY; |
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case 1000: return PANGO_WEIGHT_ULTRAHEAVY; |
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default: return PANGO_WEIGHT_NORMAL; |
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} |
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} |
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PangoStretch |
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get_pango_stretch(FT_UShort width) { |
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switch (width) { |
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case 1: return PANGO_STRETCH_ULTRA_CONDENSED; |
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case 2: return PANGO_STRETCH_EXTRA_CONDENSED; |
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case 3: return PANGO_STRETCH_CONDENSED; |
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case 4: return PANGO_STRETCH_SEMI_CONDENSED; |
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case 5: return PANGO_STRETCH_NORMAL; |
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case 6: return PANGO_STRETCH_SEMI_EXPANDED; |
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case 7: return PANGO_STRETCH_EXPANDED; |
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case 8: return PANGO_STRETCH_EXTRA_EXPANDED; |
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case 9: return PANGO_STRETCH_ULTRA_EXPANDED; |
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default: return PANGO_STRETCH_NORMAL; |
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} |
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} |
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PangoStyle |
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get_pango_style(FT_Long flags) { |
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if (flags & FT_STYLE_FLAG_ITALIC) { |
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return PANGO_STYLE_ITALIC; |
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} else { |
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return PANGO_STYLE_NORMAL; |
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} |
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} |
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/*
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* Return a PangoFontDescription that will resolve to the font file |
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*/ |
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PangoFontDescription * |
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get_pango_font_description(unsigned char* filepath) { |
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FT_Library library; |
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FT_Face face; |
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PangoFontDescription *desc = pango_font_description_new(); |
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if (!FT_Init_FreeType(&library) && !FT_New_Face(library, (const char*)filepath, 0, &face)) { |
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TT_OS2 *table = (TT_OS2*)FT_Get_Sfnt_Table(face, FT_SFNT_OS2); |
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if (table) { |
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char *family = get_family_name(face); |
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if (family) pango_font_description_set_family_static(desc, family); |
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pango_font_description_set_weight(desc, get_pango_weight(table->usWeightClass)); |
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pango_font_description_set_stretch(desc, get_pango_stretch(table->usWidthClass)); |
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pango_font_description_set_style(desc, get_pango_style(face->style_flags)); |
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FT_Done_Face(face); |
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return desc; |
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} |
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} |
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pango_font_description_free(desc); |
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return NULL; |
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} |
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/*
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* Register font with the OS |
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*/ |
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bool |
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register_font(unsigned char *filepath) { |
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bool success; |
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#ifdef __APPLE__ |
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CFURLRef filepathUrl = CFURLCreateFromFileSystemRepresentation(NULL, filepath, strlen((char*)filepath), false); |
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success = CTFontManagerRegisterFontsForURL(filepathUrl, kCTFontManagerScopeProcess, NULL); |
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#elif defined(_WIN32) |
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success = AddFontResourceEx((LPCSTR)filepath, FR_PRIVATE, 0) != 0; |
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#else |
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success = FcConfigAppFontAddFile(FcConfigGetCurrent(), (FcChar8 *)(filepath)); |
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#endif |
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if (!success) return false; |
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// Tell Pango to throw away the current FontMap and create a new one. This
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// has the effect of registering the new font in Pango by re-looking up all
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// font families.
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pango_cairo_font_map_set_default(NULL); |
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return true; |
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} |
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@ -0,0 +1,5 @@ |
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#include <pango/pango.h> |
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PangoFontDescription *get_pango_font_description(unsigned char *filepath); |
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bool register_font(unsigned char *filepath); |
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