Brand new Mac support -- no more muching with changing drivers and reinitializing streams, but a clean layer on top of FT_Open_Face(): an extended version of FT_New_Face().
This commit is contained in:
Just van Rossum
parent
e973e66a0f
commit
ae4bceefa9
717
src/base/ftmac.c
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717
src/base/ftmac.c
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@ -0,0 +1,717 @@
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/***************************************************************************/
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/* */
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/* ftmac.c */
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/* */
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/* Mac FOND support. Written by just@letterror.com. */
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/* */
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/* Copyright 1996-2000 by */
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/* Just van Rossum, David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/*
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Notes
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Mac suitcase files can (and often do!) contain multiple fonts. To
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support this I use the face_index argument of FT_(Open|New)_Face()
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functions, and pretend the suitcase file is a collection.
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Warning: although the FOND driver sets face->num_faces field to the
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number of available fonts, but the Type 1 driver sets it to 1 anyway.
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So this field is currently not reliable, and I don't see a clean way
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to resolve that. The face_index argument translates to
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Get1IndResource( 'FOND', face_index + 1 );
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so clients should figure out the resource index of the FOND.
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(I'll try to provide some example code for this at some point.)
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The Mac FOND support works roughly like this:
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- Check whether the offered stream points to a Mac suitcase file.
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This is done by checking the file type: it has to be 'FFIL' or 'tfil'.
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The stream that gets passed to our init_face() routine is a stdio
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stream, which isn't usable for us, since the FOND resources live
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in the resource fork. So we just grab the stream->pathname field.
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- Read the FOND resource into memory, then check whether there is
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a TrueType font and/or (!) a Type 1 font available.
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- If there is a Type 1 font available (as a separate 'LWFN' file),
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read its data into memory, massage it slightly so it becomes
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PFB data, wrap it into a memory stream, load the Type 1 driver
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and delegate the rest of the work to it by calling FT_Open_Face().
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(XXX TODO: after this has been done, the kerning data from the FOND
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resource should be appended to the face: on the Mac there are usually
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no AFM files available. However, this is tricky since we need to map
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Mac char codes to ps glyph names to glyph ID's...)
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- If there is a TrueType font (an 'sfnt' resource), read it into
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memory, wrap it into a memory stream, load the TrueType driver
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and delegate the rest of the work to it, by calling FT_Open_Face().
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*/
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#include <freetype/freetype.h>
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#include <freetype/internal/ftstream.h>
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#include <truetype/ttobjs.h>
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#include <type1z/z1objs.h>
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#include <Resources.h>
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#include <Fonts.h>
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#include <Errors.h>
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#include <ctype.h> /* for isupper() and isalnum() */
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#include <ftmac.h>
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/* Set PREFER_LWFN to 1 if LWFN (Type 1) is preferred over
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TrueType in case *both* are available (this is not common,
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but it *is* possible). */
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#ifndef PREFER_LWFN
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#define PREFER_LWFN 1
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#endif
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/* Quick 'n' Dirty Pascal string to C string converter.
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Warning: this call is not thread safe! Use with caution. */
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static
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char * p2c_str( unsigned char *pstr )
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{
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static char cstr[256];
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strncpy( cstr, (char*)pstr+1, pstr[0] );
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cstr[pstr[0]] = '\0';
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return cstr;
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}
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/* Given a pathname, fill in a file spec. */
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static
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int file_spec_from_path( const char* pathname, FSSpec *spec )
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{
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Str255 p_path;
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FT_ULong path_len;
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/* convert path to a pascal string */
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path_len = strlen( pathname );
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if ( path_len > 255 )
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return -1;
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p_path[0] = (unsigned char)path_len;
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strncpy( (char*)p_path+1, pathname, path_len );
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if ( FSMakeFSSpec( 0, 0, p_path, spec ) != noErr )
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return -1;
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else
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return 0;
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}
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/* Return the file type of the file specified by spec. */
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static
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OSType get_file_type( FSSpec *spec )
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{
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FInfo finfo;
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if ( FSpGetFInfo( spec, &finfo ) != noErr )
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return 0; /* file might not exist */
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return finfo.fdType;
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}
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/* Given a PostScript font name, create the Macintosh LWFN file name. */
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static
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void create_lwfn_name( char* ps_name, Str255 lwfn_file_name )
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{
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int max = 5, count = 0;
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FT_Byte* p = lwfn_file_name;
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FT_Byte* q = (FT_Byte*)ps_name;
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lwfn_file_name[0] = 0;
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while ( *q )
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{
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if ( isupper(*q) )
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{
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if ( count )
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max = 3;
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count = 0;
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}
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if ( count < max && (isalnum(*q) || *q == '_' ) )
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{
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*++p = *q;
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lwfn_file_name[0]++;
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count++;
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}
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q++;
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}
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}
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/* Given a file reference, answer its location as a vRefNum
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and a dirID. */
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static
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FT_Error get_file_location( short ref_num,
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short* v_ref_num,
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long* dir_id,
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unsigned char* file_name )
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{
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FCBPBRec pb;
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OSErr error;
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pb.ioNamePtr = file_name;
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pb.ioVRefNum = 0;
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pb.ioRefNum = ref_num;
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pb.ioFCBIndx = 0;
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error = PBGetFCBInfoSync( &pb );
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if ( error == noErr )
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{
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*v_ref_num = pb.ioFCBVRefNum;
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*dir_id = pb.ioFCBParID;
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}
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return error;
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}
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/* Make a file spec for an LWFN file from a FOND resource and
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a file name. */
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static
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FT_Error make_lwfn_spec( Handle fond,
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unsigned char* file_name,
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FSSpec* spec )
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{
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FT_Error error;
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short ref_num, v_ref_num;
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long dir_id;
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Str255 fond_file_name;
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ref_num = HomeResFile( fond );
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error = ResError();
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if ( !error )
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error = get_file_location( ref_num, &v_ref_num, &dir_id, fond_file_name );
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if ( !error )
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error = FSMakeFSSpec( v_ref_num, dir_id, file_name, spec );
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return error;
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}
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/* Look inside the FOND data, answer whether there should be an SFNT
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resource, and answer the name of a possible LWFN Type 1 file. */
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static
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void parse_fond( char* fond_data,
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short *have_sfnt,
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short *sfnt_id,
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Str255 lwfn_file_name )
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{
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AsscEntry* assoc;
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FamRec* fond;
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*sfnt_id = 0;
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*have_sfnt = 0;
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lwfn_file_name[0] = 0;
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fond = (FamRec*)fond_data;
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assoc = (AsscEntry*)(fond_data + sizeof(FamRec) + 2);
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if ( assoc->fontSize == 0 )
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{
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*have_sfnt = 1;
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*sfnt_id = assoc->fontID;
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}
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if ( fond->ffStylOff )
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{
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unsigned char* p = (unsigned char*)fond_data;
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StyleTable* style;
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unsigned short string_count;
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unsigned char* name_table = 0;
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char ps_name[256];
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unsigned char* names[64];
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int i;
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p += fond->ffStylOff;
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style = (StyleTable*)p;
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p += sizeof(StyleTable);
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string_count = *(unsigned short*)(p);
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p += sizeof(short);
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for ( i = 0 ; i < string_count && i < 64; i++ )
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{
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names[i] = p;
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p += names[i][0];
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p++;
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}
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strcpy(ps_name, p2c_str(names[0])); /* Family name */
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if ( style->indexes[0] > 1 )
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{
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unsigned char* suffixes = names[style->indexes[0]-1];
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for ( i=1; i<=suffixes[0]; i++ )
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strcat( ps_name, p2c_str(names[suffixes[i]-1]) );
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}
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create_lwfn_name( ps_name, lwfn_file_name );
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}
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}
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/* Read Type 1 data from the POST resources inside the LWFN file,
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return a PFB buffer. This is somewhat convoluted because the FT2
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PFB parser wants the ASCII header as one chunk, and the LWFN
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chunks are often not organized that way, so we'll glue chunks
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of the same type together. */
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static
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FT_Error read_lwfn( FT_Memory memory,
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FSSpec* lwfn_spec,
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FT_Byte** pfb_data,
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FT_ULong* size )
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{
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FT_Error error = FT_Err_Ok;
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short res_ref, res_id;
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unsigned char *buffer, *p, *size_p;
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FT_ULong total_size = 0;
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FT_ULong post_size, pfb_chunk_size;
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Handle post_data;
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char code, last_code;
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res_ref = FSpOpenResFile( lwfn_spec, fsRdPerm );
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if ( ResError() )
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return FT_Err_Out_Of_Memory;
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UseResFile( res_ref );
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/* First pass: load all POST resources, and determine the size of
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the output buffer. */
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res_id = 501;
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last_code = -1;
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for (;;)
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{
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post_data = Get1Resource( 'POST', res_id++ );
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if ( post_data == NULL )
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break; /* we're done */
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code = (*post_data)[0];
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if ( code != last_code )
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{
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if ( code == 5 )
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total_size += 2; /* just the end code */
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else
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total_size += 6; /* code + 4 bytes chunk length */
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}
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total_size += GetHandleSize( post_data ) - 2;
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last_code = code;
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}
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if ( ALLOC( buffer, (FT_Long)total_size ) )
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goto Error;
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/* Second pass: append all POST data to the buffer, add PFB fields.
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Glue all consequtive chunks of the same type together. */
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p = buffer;
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res_id = 501;
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last_code = -1;
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pfb_chunk_size = 0;
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for (;;)
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{
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post_data = Get1Resource( 'POST', res_id++ );
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if ( post_data == NULL )
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break; /* we're done */
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post_size = (FT_ULong)GetHandleSize( post_data ) - 2;
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code = (*post_data)[0];
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if ( code != last_code )
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{
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if ( last_code != -1 )
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{
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/* we're done adding a chunk, fill in the size field */
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*size_p++ = (FT_Byte)(pfb_chunk_size & 0xFF);
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*size_p++ = (FT_Byte)((pfb_chunk_size >> 8) & 0xFF);
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*size_p++ = (FT_Byte)((pfb_chunk_size >> 16) & 0xFF);
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*size_p++ = (FT_Byte)((pfb_chunk_size >> 24) & 0xFF);
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pfb_chunk_size = 0;
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}
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*p++ = 0x80;
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if ( code == 5 )
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*p++ = 0x03; /* the end */
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else if ( code == 2 )
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*p++ = 0x02; /* binary segment */
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else
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*p++ = 0x01; /* ASCII segment */
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if ( code != 5 )
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{
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size_p = p; /* save for later */
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p += 4; /* make space for size field */
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}
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}
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memcpy( p, *post_data + 2, post_size );
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pfb_chunk_size += post_size;
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p += post_size;
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last_code = code;
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}
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*pfb_data = buffer;
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*size = total_size;
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Error:
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CloseResFile( res_ref );
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return error;
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}
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/* Finalizer for a memory stream; gets called by FT_Done_Face().
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It frees the memory it uses. */
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static
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void memory_stream_close( FT_Stream stream )
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{
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FT_Memory memory = stream->memory;
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FREE( stream->base );
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stream->size = 0;
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stream->base = 0;
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stream->close = 0;
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}
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/* Create a new memory stream from a buffer and a size. */
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static
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FT_Error new_memory_stream( FT_Library library,
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FT_Byte* base,
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FT_ULong size,
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FT_Stream_Close close,
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FT_Stream* astream )
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{
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FT_Error error;
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FT_Memory memory;
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FT_Stream stream;
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if ( !library )
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return FT_Err_Invalid_Library_Handle;
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if ( !base )
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return FT_Err_Invalid_Argument;
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*astream = 0;
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memory = library->memory;
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if ( ALLOC( stream, sizeof(*stream) ) )
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goto Exit;
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FT_New_Memory_Stream( library,
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base,
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size,
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stream );
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stream->close = close;
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*astream = stream;
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Exit:
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return error;
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}
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/* Create a new FT_Face given a buffer and a driver name. */
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static
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FT_Error open_face_from_buffer( FT_Library library,
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FT_Byte* base,
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FT_ULong size,
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FT_Long face_index,
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char* driver_name,
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FT_Face* aface )
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{
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FT_Open_Args args;
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FT_Error error;
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FT_Stream stream;
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FT_Memory memory = library->memory;
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error = new_memory_stream( library,
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base,
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size,
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memory_stream_close,
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&stream );
|
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if ( error )
|
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{
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FREE( base );
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return error;
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}
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args.flags = ft_open_stream;
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args.stream = stream;
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if ( driver_name )
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{
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args.flags = args.flags | ft_open_driver;
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args.driver = FT_Get_Module( library, driver_name );
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}
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error = FT_Open_Face( library, &args, face_index, aface );
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if ( !error )
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(*aface)->face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM;
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FREE( stream ); /* FT_Open_Face() made a copy */
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return error;
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}
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/* Create a new FT_Face from a file spec to an LWFN file. */
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static
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FT_Error FT_New_Face_From_LWFN( FT_Library library,
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FSSpec* spec,
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FT_Long face_index,
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FT_Face* aface )
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{
|
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FT_Byte* pfb_data;
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FT_ULong pfb_size;
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FT_Error error;
|
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FT_Memory memory = library->memory;
|
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|
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error = read_lwfn( library->memory, spec, &pfb_data, &pfb_size );
|
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if ( error )
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return error;
|
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|
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#if 0
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{
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FILE* f;
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char * path;
|
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path = p2c_str( spec->name );
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strcat( path, ".PFB" );
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f = fopen(path, "wb");
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if ( f )
|
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{
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fwrite( pfb_data, 1, pfb_size, f );
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fclose( f );
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}
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}
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#endif
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return open_face_from_buffer( library,
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pfb_data,
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pfb_size,
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face_index,
|
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"type1",
|
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aface );
|
||||
}
|
||||
|
||||
|
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/* Create a new FT_Face from an SFNT resource, specified by res ID. */
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static
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FT_Error FT_New_Face_From_SFNT( FT_Library library,
|
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short sfnt_id,
|
||||
FT_Long face_index,
|
||||
FT_Face* aface )
|
||||
{
|
||||
Handle sfnt = NULL;
|
||||
FT_Byte* sfnt_data;
|
||||
size_t sfnt_size;
|
||||
FT_Stream stream = NULL;
|
||||
FT_Error error = 0;
|
||||
FT_Memory memory = library->memory;
|
||||
|
||||
|
||||
sfnt = GetResource( 'sfnt', sfnt_id );
|
||||
if ( ResError() )
|
||||
return FT_Err_Invalid_Handle;
|
||||
|
||||
sfnt_size = (FT_ULong)GetHandleSize( sfnt );
|
||||
if ( ALLOC( sfnt_data, (FT_Long)sfnt_size ) )
|
||||
{
|
||||
ReleaseResource( sfnt );
|
||||
return error;
|
||||
}
|
||||
|
||||
HLock( sfnt );
|
||||
memcpy( sfnt_data, *sfnt, sfnt_size);
|
||||
HUnlock( sfnt );
|
||||
ReleaseResource( sfnt );
|
||||
|
||||
return open_face_from_buffer( library,
|
||||
sfnt_data,
|
||||
sfnt_size,
|
||||
face_index,
|
||||
"truetype",
|
||||
aface );
|
||||
}
|
||||
|
||||
|
||||
/* Create a new FT_Face from a file spec to a suitcase file. */
|
||||
static
|
||||
FT_Error FT_New_Face_From_Suitcase( FT_Library library,
|
||||
FSSpec* spec,
|
||||
FT_Long face_index,
|
||||
FT_Face* aface )
|
||||
{
|
||||
FT_Error error = FT_Err_Ok;
|
||||
short res_ref, res_index;
|
||||
Handle fond;
|
||||
|
||||
|
||||
res_ref = FSpOpenResFile( spec, fsRdPerm );
|
||||
if ( ResError() )
|
||||
return FT_Err_Cannot_Open_Resource;
|
||||
UseResFile( res_ref );
|
||||
|
||||
/* face_index may be -1, in which case we
|
||||
just need to do a sanity check */
|
||||
if ( face_index < 0)
|
||||
res_index = 1;
|
||||
else
|
||||
{
|
||||
res_index = (short)(face_index + 1);
|
||||
face_index = 0;
|
||||
}
|
||||
fond = Get1IndResource( 'FOND', res_index );
|
||||
if ( ResError() )
|
||||
{
|
||||
error = FT_Err_Cannot_Open_Resource;
|
||||
goto Error;
|
||||
}
|
||||
|
||||
error = FT_New_Face_From_FOND( library, fond, face_index, aface );
|
||||
|
||||
Error:
|
||||
CloseResFile( res_ref );
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
/*************************************************************************/
|
||||
/* */
|
||||
/* <Function> */
|
||||
/* FT_New_Face_From_FOND */
|
||||
/* */
|
||||
/* <Description> */
|
||||
/* Creates a new face object from an FOND resource. */
|
||||
/* */
|
||||
/* <InOut> */
|
||||
/* library :: A handle to the library resource. */
|
||||
/* */
|
||||
/* <Input> */
|
||||
/* fond :: An FOND resource. */
|
||||
/* */
|
||||
/* face_index :: only supported for the -1 `sanity check' */
|
||||
/* special case. */
|
||||
/* */
|
||||
/* <Output> */
|
||||
/* aface :: A handle to a new face object. */
|
||||
/* */
|
||||
/* <Return> */
|
||||
/* FreeType error code. 0 means success. */
|
||||
/* */
|
||||
/* <Notes> */
|
||||
/* This function can be used to create FT_Face abjects from fonts */
|
||||
/* that are installed in the system like so: */
|
||||
/* fond = GetResource( 'FOND', fontName ); */
|
||||
/* error = FT_New_Face_From_FOND( library, fond, 0, &face ); */
|
||||
/* */
|
||||
FT_EXPORT_FUNC( FT_Error ) FT_New_Face_From_FOND(
|
||||
FT_Library library,
|
||||
Handle fond,
|
||||
FT_Long face_index,
|
||||
FT_Face* aface )
|
||||
{
|
||||
short sfnt_id, have_sfnt, have_lwfn = 0;
|
||||
Str255 lwfn_file_name;
|
||||
short fond_id;
|
||||
OSType fond_type;
|
||||
Str255 fond_name;
|
||||
FSSpec lwfn_spec;
|
||||
FT_Error error = FT_Err_Unknown_File_Format;
|
||||
|
||||
|
||||
GetResInfo(fond, &fond_id, &fond_type, fond_name);
|
||||
if ( ResError() != noErr || fond_type != 'FOND' )
|
||||
return FT_Err_Invalid_File_Format;
|
||||
|
||||
HLock( fond );
|
||||
parse_fond( *fond, &have_sfnt, &sfnt_id, lwfn_file_name );
|
||||
HUnlock( fond );
|
||||
|
||||
if ( lwfn_file_name[0] )
|
||||
{
|
||||
if ( make_lwfn_spec( fond, lwfn_file_name, &lwfn_spec ) == FT_Err_Ok )
|
||||
have_lwfn = 1; /* yeah, we got one! */
|
||||
else
|
||||
have_lwfn = 0; /* no LWFN file found */
|
||||
}
|
||||
|
||||
if ( have_lwfn && ( !have_sfnt || PREFER_LWFN ) )
|
||||
return FT_New_Face_From_LWFN( library,
|
||||
&lwfn_spec,
|
||||
face_index,
|
||||
aface );
|
||||
else if ( have_sfnt )
|
||||
return FT_New_Face_From_SFNT( library,
|
||||
sfnt_id,
|
||||
face_index,
|
||||
aface );
|
||||
|
||||
return FT_Err_Unknown_File_Format;
|
||||
}
|
||||
|
||||
|
||||
/*************************************************************************/
|
||||
/* */
|
||||
/* <Function> */
|
||||
/* FT_New_Face */
|
||||
/* */
|
||||
/* <Description> */
|
||||
/* This is the Mac-specific implementation of FT_New_Face. In */
|
||||
/* addition to the standard FT_New_Face functionality, it also */
|
||||
/* accepts pathnames to Mac suitcase files. For further */
|
||||
/* documentation see the original FT_New_Face in ftobjs.c. */
|
||||
/* */
|
||||
FT_EXPORT_FUNC( FT_Error ) FT_New_Face( FT_Library library,
|
||||
const char* pathname,
|
||||
FT_Long face_index,
|
||||
FT_Face* aface )
|
||||
{
|
||||
FT_Open_Args args;
|
||||
FSSpec spec;
|
||||
OSType file_type;
|
||||
|
||||
|
||||
/* test for valid `library' and `aface' delayed to FT_Open_Face() */
|
||||
if ( !pathname )
|
||||
return FT_Err_Invalid_Argument;
|
||||
|
||||
if ( file_spec_from_path( pathname, &spec ) )
|
||||
return FT_Err_Invalid_Argument;
|
||||
|
||||
file_type = get_file_type( &spec );
|
||||
if ( file_type == 'FFIL' || file_type == 'tfil' )
|
||||
return FT_New_Face_From_Suitcase( library, &spec, face_index, aface );
|
||||
else if ( file_type == 'LWFN' )
|
||||
return FT_New_Face_From_LWFN( library, &spec, face_index, aface );
|
||||
else
|
||||
{
|
||||
args.flags = ft_open_pathname;
|
||||
args.pathname = (char*)pathname;
|
||||
|
||||
return FT_Open_Face( library, &args, face_index, aface );
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user