+++ /dev/null
-/***************************************************************************/
-/* */
-/* t2load.c */
-/* */
-/* TrueType glyph data/program tables loader (body). */
-/* */
-/* Copyright 1996-2000 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
-
-
-#include <freetype/internal/ftdebug.h>
-#include <freetype/internal/ftobjs.h>
-#include <freetype/internal/ftstream.h>
-#include <freetype/internal/psnames.h>
-
-#include <freetype/internal/t2errors.h>
-#include <freetype/tttags.h>
-
-
-#ifdef FT_FLAT_COMPILE
-
-#include "t2load.h"
-#include "t2parse.h"
-
-#else
-
-#include <freetype/src/cff/t2load.h>
-#include <freetype/src/cff/t2parse.h>
-
-#endif
-
-
- /*************************************************************************/
- /* */
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
- /* messages during execution. */
- /* */
-#undef FT_COMPONENT
-#define FT_COMPONENT trace_t2load
-
-
- /* read a CFF offset from memory */
- static
- FT_ULong t2_get_offset( FT_Byte* p,
- FT_Byte off_size )
- {
- FT_ULong result;
-
-
- for ( result = 0; off_size > 0; off_size-- )
- {
- result <<= 8;
- result |= *p++;
- }
-
- return result;
- }
-
-
- static
- FT_Error t2_new_cff_index( CFF_Index* index,
- FT_Stream stream,
- FT_Bool load )
- {
- FT_Error error;
- FT_Memory memory = stream->memory;
- FT_UShort count;
-
-
- MEM_Set( index, 0, sizeof ( *index ) );
-
- index->stream = stream;
- if ( !READ_UShort( count ) &&
- count > 0 )
- {
- FT_Byte* p;
- FT_Byte offsize;
- FT_ULong data_size;
- FT_ULong* poff;
-
-
- /* there is at least one element; read the offset size, */
- /* then access the offset table to compute the index's total size */
- if ( READ_Byte( offsize ) )
- goto Exit;
-
- index->stream = stream;
- index->count = count;
- index->off_size = offsize;
- data_size = (FT_ULong)( count + 1 ) * offsize;
-
- if ( ALLOC_ARRAY( index->offsets, count + 1, FT_ULong ) ||
- ACCESS_Frame( data_size ) )
- goto Exit;
-
- poff = index->offsets;
- p = (FT_Byte*)stream->cursor;
-
- for ( ; (FT_Short)count >= 0; count-- )
- {
- poff[0] = t2_get_offset( p, offsize );
- poff++;
- p += offsize;
- }
-
- FORGET_Frame();
-
- index->data_offset = FILE_Pos();
- data_size = poff[-1] - 1;
-
- if ( load )
- {
- /* load the data */
- if ( EXTRACT_Frame( data_size, index->bytes ) )
- goto Exit;
- }
- else
- {
- /* skip the data */
- (void)FILE_Skip( data_size );
- }
- }
-
- Exit:
- if ( error )
- FREE( index->offsets );
-
- return error;
- }
-
-
- static
- void t2_done_cff_index( CFF_Index* index )
- {
- if ( index->stream )
- {
- FT_Stream stream = index->stream;
- FT_Memory memory = stream->memory;
-
-
- if ( index->bytes )
- RELEASE_Frame( index->bytes );
-
- FREE( index->offsets );
- MEM_Set( index, 0, sizeof ( *index ) );
- }
- }
-
-
- static
- FT_Error t2_explicit_cff_index( CFF_Index* index,
- FT_Byte*** table )
- {
- FT_Error error = 0;
- FT_Memory memory = index->stream->memory;
- FT_UInt n, offset, old_offset;
- FT_Byte** t;
-
-
- *table = 0;
-
- if ( index->count > 0 && !ALLOC_ARRAY( t, index->count + 1, FT_Byte* ) )
- {
- old_offset = 1;
- for ( n = 0; n <= index->count; n++ )
- {
- offset = index->offsets[n];
- if ( !offset )
- offset = old_offset;
-
- t[n] = index->bytes + offset - 1;
-
- old_offset = offset;
- }
- *table = t;
- }
-
- return error;
- }
-
-
- LOCAL_FUNC
- FT_Error T2_Access_Element( CFF_Index* index,
- FT_UInt element,
- FT_Byte** pbytes,
- FT_ULong* pbyte_len )
- {
- FT_Error error = 0;
-
-
- if ( index && index->count > element )
- {
- /* compute start and end offsets */
- FT_ULong off1, off2;
-
-
- off1 = index->offsets[element];
- if ( off1 )
- {
- do
- {
- element++;
- off2 = index->offsets[element];
-
- } while ( off2 == 0 && element < index->count );
-
- if ( !off2 )
- off1 = 0;
- }
-
- /* access element */
- if ( off1 )
- {
- *pbyte_len = off2 - off1;
-
- if ( index->bytes )
- {
- /* this index was completely loaded in memory, that's easy */
- *pbytes = index->bytes + off1 - 1;
- }
- else
- {
- /* this index is still on disk/file, access it through a frame */
- FT_Stream stream = index->stream;
-
-
- if ( FILE_Seek( index->data_offset + off1 - 1 ) ||
- EXTRACT_Frame( off2 - off1, *pbytes ) )
- goto Exit;
- }
- }
- else
- {
- /* empty index element */
- *pbytes = 0;
- *pbyte_len = 0;
- }
- }
- else
- error = T2_Err_Invalid_Argument;
-
- Exit:
- return error;
- }
-
-
- LOCAL_FUNC
- void T2_Forget_Element( CFF_Index* index,
- FT_Byte** pbytes )
- {
- if ( index->bytes == 0 )
- {
- FT_Stream stream = index->stream;
-
-
- RELEASE_Frame( *pbytes );
- }
- }
-
-
- LOCAL_FUNC
- FT_String* T2_Get_Name( CFF_Index* index,
- FT_UInt element )
- {
- FT_Memory memory = index->stream->memory;
- FT_Byte* bytes;
- FT_ULong byte_len;
- FT_Error error;
- FT_String* name = 0;
-
-
- error = T2_Access_Element( index, element, &bytes, &byte_len );
- if ( error )
- goto Exit;
-
- if ( !ALLOC( name, byte_len + 1 ) )
- {
- MEM_Copy( name, bytes, byte_len );
- name[byte_len] = 0;
- }
- T2_Forget_Element( index, &bytes );
-
- Exit:
- return name;
- }
-
-
- LOCAL_FUNC
- FT_String* T2_Get_String( CFF_Index* index,
- FT_UInt sid,
- PSNames_Interface* interface )
- {
- /* if it is not a standard string, return it */
- if ( sid > 390 )
- return T2_Get_Name( index, sid - 390 );
-
- /* that's a standard string, fetch a copy from the PSName module */
- {
- FT_String* name = 0;
- const char* adobe_name = interface->adobe_std_strings( sid );
- FT_UInt len;
-
-
- if ( adobe_name )
- {
- FT_Memory memory = index->stream->memory;
- FT_Error error;
-
-
- len = (FT_UInt)strlen( adobe_name );
- if ( !ALLOC( name, len + 1 ) )
- {
- MEM_Copy( name, adobe_name, len );
- name[len] = 0;
- }
- }
-
- return name;
- }
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** FD Select table support ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
-
-
- static
- void CFF_Done_FD_Select( CFF_FD_Select* select,
- FT_Stream stream )
- {
- if ( select->data )
- RELEASE_Frame( select->data );
-
- select->data_size = 0;
- select->format = 0;
- select->range_count = 0;
- }
-
-
- static
- FT_Error CFF_Load_FD_Select( CFF_FD_Select* select,
- FT_UInt num_glyphs,
- FT_Stream stream,
- FT_ULong offset )
- {
- FT_Error error;
- FT_Byte format;
- FT_UInt num_ranges;
-
-
- /* read format */
- if ( FILE_Seek( offset ) || READ_Byte( format ) )
- goto Exit;
-
- select->format = format;
- select->cache_count = 0; /* clear cache */
-
- switch ( format )
- {
- case 0: /* format 0, that's simple */
- select->data_size = num_glyphs;
- goto Load_Data;
-
- case 3: /* format 3, a tad more complex */
- if ( READ_UShort( num_ranges ) )
- goto Exit;
-
- select->data_size = num_ranges * 3 + 2;
-
- Load_Data:
- if ( EXTRACT_Frame( select->data_size, select->data ) )
- goto Exit;
- break;
-
- default: /* hmm... that's wrong */
- error = T2_Err_Invalid_File_Format;
- }
-
- Exit:
- return error;
- }
-
-
- LOCAL_FUNC
- FT_Byte CFF_Get_FD( CFF_FD_Select* select,
- FT_UInt glyph_index )
- {
- FT_Byte fd = 0;
-
-
- switch ( select->format )
- {
- case 0:
- fd = select->data[glyph_index];
- break;
-
- case 3:
- /* first, compare to cache */
- if ( (FT_UInt)(glyph_index-select->cache_first) < select->cache_count )
- {
- fd = select->cache_fd;
- break;
- }
-
- /* then, lookup the ranges array */
- {
- FT_Byte* p = select->data;
- FT_Byte* p_limit = p + select->data_size;
- FT_Byte fd2;
- FT_UInt first, limit;
-
-
- first = NEXT_UShort( p );
- do
- {
- if ( glyph_index < first )
- break;
-
- fd2 = *p++;
- limit = NEXT_UShort( p );
-
- if ( glyph_index < limit )
- {
- fd = fd2;
-
- /* update cache */
- select->cache_first = first;
- select->cache_count = limit-first;
- select->cache_fd = fd2;
- break;
- }
- first = limit;
-
- } while ( p < p_limit );
- }
- break;
-
- default:
- ;
- }
-
- return fd;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** CFF font support ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
-
-
- static
- FT_Error CFF_Load_SubFont( CFF_SubFont* font,
- CFF_Index* index,
- FT_UInt font_index,
- FT_Stream stream,
- FT_ULong base_offset )
- {
- FT_Error error;
- T2_Parser parser;
- FT_Byte* dict;
- FT_ULong dict_len;
- CFF_Font_Dict* top = &font->font_dict;
- CFF_Private* priv = &font->private_dict;
-
-
- T2_Parser_Init( &parser, T2CODE_TOPDICT, &font->font_dict );
-
- /* set defaults */
- MEM_Set( top, 0, sizeof ( *top ) );
-
- top->underline_position = -100;
- top->underline_thickness = 50;
- top->charstring_type = 2;
- top->font_matrix.xx = 0x10000L;
- top->font_matrix.yy = 0x10000L;
- top->cid_count = 8720;
-
- error = T2_Access_Element( index, font_index, &dict, &dict_len ) ||
- T2_Parser_Run( &parser, dict, dict + dict_len );
-
- T2_Forget_Element( index, &dict );
-
- if ( error )
- goto Exit;
-
- /* if it is a CID font, we stop there */
- if ( top->cid_registry )
- goto Exit;
-
- /* parse the private dictionary, if any */
- if ( top->private_offset && top->private_size )
- {
- /* set defaults */
- MEM_Set( priv, 0, sizeof ( *priv ) );
-
- priv->blue_shift = 7;
- priv->blue_fuzz = 1;
- priv->lenIV = -1;
- priv->expansion_factor = (FT_Fixed)0.06 * 0x10000L;
- priv->blue_scale = (FT_Fixed)0.039625 * 0x10000L;
-
- T2_Parser_Init( &parser, T2CODE_PRIVATE, priv );
-
- if ( FILE_Seek( base_offset + font->font_dict.private_offset ) ||
- ACCESS_Frame( font->font_dict.private_size ) )
- goto Exit;
-
- error = T2_Parser_Run( &parser,
- (FT_Byte*)stream->cursor,
- (FT_Byte*)stream->limit );
- FORGET_Frame();
- if ( error )
- goto Exit;
- }
-
- /* read the local subrs, if any */
- if ( priv->local_subrs_offset )
- {
- if ( FILE_Seek( base_offset + top->private_offset +
- priv->local_subrs_offset ) )
- goto Exit;
-
- error = t2_new_cff_index( &font->local_subrs_index, stream, 1 );
- if ( error )
- goto Exit;
-
- font->num_local_subrs = font->local_subrs_index.count;
- error = t2_explicit_cff_index( &font->local_subrs_index,
- &font->local_subrs );
- }
-
- Exit:
- return error;
- }
-
-
- static
- void CFF_Done_SubFont( FT_Memory memory,
- CFF_SubFont* subfont )
- {
- if ( subfont )
- {
- t2_done_cff_index( &subfont->local_subrs_index );
- FREE( subfont->local_subrs );
- }
- }
-
-
- LOCAL_FUNC
- FT_Error T2_Load_CFF_Font( FT_Stream stream,
- FT_Int face_index,
- CFF_Font* font )
- {
- static const FT_Frame_Field cff_header_fields[] =
- {
- FT_FRAME_START( 4 ),
- FT_FRAME_BYTE( CFF_Font, version_major ),
- FT_FRAME_BYTE( CFF_Font, version_minor ),
- FT_FRAME_BYTE( CFF_Font, header_size ),
- FT_FRAME_BYTE( CFF_Font, absolute_offsize ),
- FT_FRAME_END
- };
-
- FT_Error error;
- FT_Memory memory = stream->memory;
- FT_ULong base_offset;
- CFF_Font_Dict* dict;
-
-
- MEM_Set( font, 0, sizeof ( *font ) );
- font->stream = stream;
- font->memory = memory;
- dict = &font->top_font.font_dict;
- base_offset = FILE_Pos();
-
- /* read CFF font header */
- if ( READ_Fields( cff_header_fields, font ) )
- goto Exit;
-
- /* check format */
- if ( font->version_major != 1 ||
- font->header_size < 4 ||
- font->absolute_offsize > 4 )
- {
- FT_TRACE2(( "[not a CFF font header!]\n" ));
- error = FT_Err_Unknown_File_Format;
- goto Exit;
- }
-
- /* skip the rest of the header */
- (void)FILE_Skip( font->header_size - 4 );
-
- /* read the name, top dict, string and global subrs index */
- error = t2_new_cff_index( &font->name_index, stream, 0 ) ||
- t2_new_cff_index( &font->font_dict_index, stream, 0 ) ||
- t2_new_cff_index( &font->string_index, stream, 0 ) ||
- t2_new_cff_index( &font->global_subrs_index, stream, 1 );
- if ( error )
- goto Exit;
-
- /* well, we don't really forget the `disabled' fonts... */
- font->num_faces = font->name_index.count;
- if ( face_index >= (FT_Int)font->num_faces )
- {
- FT_ERROR(( "T2_Load_CFF_Font: incorrect face index = %d\n",
- face_index ));
- error = T2_Err_Invalid_Argument;
- }
-
- /* in case of a font format check, simply exit now */
- if ( face_index < 0 )
- goto Exit;
-
- /* now, parse the top-level font dictionary */
- error = CFF_Load_SubFont( &font->top_font,
- &font->font_dict_index,
- face_index,
- stream,
- base_offset );
- if ( error )
- goto Exit;
-
- /* now, check for a CID font */
- if ( dict->cid_registry )
- {
- CFF_Index fd_index;
- CFF_SubFont* sub;
- FT_UInt index;
-
-
- /* this is a CID-keyed font, we must now allocate a table of */
- /* sub-fonts, then load each of them separately */
- if ( FILE_Seek( base_offset + dict->cid_fd_array_offset ) )
- goto Exit;
-
- error = t2_new_cff_index( &fd_index, stream, 0 );
- if ( error )
- goto Exit;
-
- if ( fd_index.count > CFF_MAX_CID_FONTS )
- {
- FT_ERROR(( "T2_Load_CFF_Font: FD array too large in CID font\n" ));
- goto Fail_CID;
- }
-
- /* allocate & read each font dict independently */
- font->num_subfonts = fd_index.count;
- if ( ALLOC_ARRAY( sub, fd_index.count, CFF_SubFont ) )
- goto Fail_CID;
-
- /* setup pointer table */
- for ( index = 0; index < fd_index.count; index++ )
- font->subfonts[index] = sub + index;
-
- /* now load each sub font independently */
- for ( index = 0; index < fd_index.count; index++ )
- {
- sub = font->subfonts[index];
- error = CFF_Load_SubFont( sub, &fd_index, index,
- stream, base_offset );
- if ( error )
- goto Fail_CID;
- }
-
- /* now load the FD Select array */
- error = CFF_Load_FD_Select( &font->fd_select,
- dict->cid_count,
- stream,
- base_offset + dict->cid_fd_select_offset );
-
- Fail_CID:
- t2_done_cff_index( &fd_index );
-
- if ( error )
- goto Exit;
- }
- else
- font->num_subfonts = 0;
-
- /* read the charstrings index now */
- if ( dict->charstrings_offset == 0 )
- {
- FT_ERROR(( "T2_Load_CFF_Font: no charstrings offset!\n" ));
- error = FT_Err_Unknown_File_Format;
- goto Exit;
- }
-
- if ( FILE_Seek( base_offset + dict->charstrings_offset ) )
- goto Exit;
-
- error = t2_new_cff_index( &font->charstrings_index, stream, 0 );
- if ( error )
- goto Exit;
-
- /* explicit the global subrs */
- font->num_global_subrs = font->global_subrs_index.count;
- font->num_glyphs = font->charstrings_index.count;
-
- error = t2_explicit_cff_index( &font->global_subrs_index,
- &font->global_subrs ) ;
-
- if ( error )
- goto Exit;
-
- /* get the font name */
- font->font_name = T2_Get_Name( &font->name_index, face_index );
-
- Exit:
- return error;
- }
-
-
- LOCAL_FUNC
- void T2_Done_CFF_Font( CFF_Font* font )
- {
- FT_Memory memory = font->memory;
- FT_UInt index;
-
-
- t2_done_cff_index( &font->global_subrs_index );
- t2_done_cff_index( &font->string_index );
- t2_done_cff_index( &font->font_dict_index );
- t2_done_cff_index( &font->name_index );
- t2_done_cff_index( &font->charstrings_index );
-
- /* release font dictionaries */
- for ( index = 0; index < font->num_subfonts; index++ )
- CFF_Done_SubFont( memory, font->subfonts[index] );
-
- CFF_Done_SubFont( memory, &font->top_font );
-
- CFF_Done_FD_Select( &font->fd_select, font->stream );
-
- FREE( font->global_subrs );
- FREE( font->font_name );
- }
-
-
-/* END */
git://git.jankratochvil.net / reactos.git / blobdiff