+++ /dev/null
-/***************************************************************************/
-/* */
-/* t1load.c */
-/* */
-/* Type 1 font loader (body). */
-/* */
-/* Copyright 1996-2001 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. */
-/* */
-/***************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* This is the new and improved Type 1 data loader for FreeType 2. The */
- /* old loader has several problems: it is slow, complex, difficult to */
- /* maintain, and contains incredible hacks to make it accept some */
- /* ill-formed Type 1 fonts without hiccup-ing. Moreover, about 5% of */
- /* the Type 1 fonts on my machine still aren't loaded correctly by it. */
- /* */
- /* This version is much simpler, much faster and also easier to read and */
- /* maintain by a great order of magnitude. The idea behind it is to */
- /* _not_ try to read the Type 1 token stream with a state machine (i.e. */
- /* a Postscript-like interpreter) but rather to perform simple pattern */
- /* matching. */
- /* */
- /* Indeed, nearly all data definitions follow a simple pattern like */
- /* */
- /* ... /Field <data> ... */
- /* */
- /* where <data> can be a number, a boolean, a string, or an array of */
- /* numbers. There are a few exceptions, namely the encoding, font name, */
- /* charstrings, and subrs; they are handled with a special pattern */
- /* matching routine. */
- /* */
- /* All other common cases are handled very simply. The matching rules */
- /* are defined in the file `t1tokens.h' through the use of several */
- /* macros calls PARSE_XXX. */
- /* */
- /* This file is included twice here; the first time to generate parsing */
- /* callback functions, the second to generate a table of keywords (with */
- /* pointers to the associated callback). */
- /* */
- /* The function `parse_dict' simply scans *linearly* a given dictionary */
- /* (either the top-level or private one) and calls the appropriate */
- /* callback when it encounters an immediate keyword. */
- /* */
- /* This is by far the fastest way one can find to parse and read all */
- /* data. */
- /* */
- /* This led to tremendous code size reduction. Note that later, the */
- /* glyph loader will also be _greatly_ simplified, and the automatic */
- /* hinter will replace the clumsy `t1hinter'. */
- /* */
- /*************************************************************************/
-
-
-#include <ft2build.h>
-#include FT_INTERNAL_DEBUG_H
-#include FT_CONFIG_CONFIG_H
-#include FT_MULTIPLE_MASTERS_H
-#include FT_INTERNAL_TYPE1_TYPES_H
-
-#include "t1load.h"
-
-#include "t1errors.h"
-
-#include <string.h> /* for strncmp(), strcmp() */
-#include <ctype.h> /* for isalnum() */
-
-
- /*************************************************************************/
- /* */
- /* 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_t1load
-
-
-#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** MULTIPLE MASTERS SUPPORT *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- static FT_Error
- t1_allocate_blend( T1_Face face,
- FT_UInt num_designs,
- FT_UInt num_axis )
- {
- T1_Blend* blend;
- FT_Memory memory = face->root.memory;
- FT_Error error = 0;
-
-
- blend = face->blend;
- if ( !blend )
- {
- if ( ALLOC( blend, sizeof ( *blend ) ) )
- goto Exit;
-
- face->blend = blend;
- }
-
- /* allocate design data if needed */
- if ( num_designs > 0 )
- {
- if ( blend->num_designs == 0 )
- {
- FT_UInt nn;
-
-
- /* allocate the blend `private' and `font_info' dictionaries */
- if ( ALLOC_ARRAY( blend->font_infos[1], num_designs, T1_FontInfo ) ||
- ALLOC_ARRAY( blend->privates[1], num_designs, T1_Private ) ||
- ALLOC_ARRAY( blend->weight_vector, num_designs * 2, FT_Fixed ) )
- goto Exit;
-
- blend->default_weight_vector = blend->weight_vector + num_designs;
-
- blend->font_infos[0] = &face->type1.font_info;
- blend->privates [0] = &face->type1.private_dict;
-
- for ( nn = 2; nn <= num_designs; nn++ )
- {
- blend->privates[nn] = blend->privates [nn - 1] + 1;
- blend->font_infos[nn] = blend->font_infos[nn - 1] + 1;
- }
-
- blend->num_designs = num_designs;
- }
- else if ( blend->num_designs != num_designs )
- goto Fail;
- }
-
- /* allocate axis data if needed */
- if ( num_axis > 0 )
- {
- if ( blend->num_axis != 0 && blend->num_axis != num_axis )
- goto Fail;
-
- blend->num_axis = num_axis;
- }
-
- /* allocate the blend design pos table if needed */
- num_designs = blend->num_designs;
- num_axis = blend->num_axis;
- if ( num_designs && num_axis && blend->design_pos[0] == 0 )
- {
- FT_UInt n;
-
-
- if ( ALLOC_ARRAY( blend->design_pos[0],
- num_designs * num_axis, FT_Fixed ) )
- goto Exit;
-
- for ( n = 1; n < num_designs; n++ )
- blend->design_pos[n] = blend->design_pos[0] + num_axis * n;
- }
-
- Exit:
- return error;
-
- Fail:
- error = -1;
- goto Exit;
- }
-
-
- FT_LOCAL_DEF FT_Error
- T1_Get_Multi_Master( T1_Face face,
- FT_Multi_Master* master )
- {
- T1_Blend* blend = face->blend;
- FT_UInt n;
- FT_Error error;
-
-
- error = T1_Err_Invalid_Argument;
-
- if ( blend )
- {
- master->num_axis = blend->num_axis;
- master->num_designs = blend->num_designs;
-
- for ( n = 0; n < blend->num_axis; n++ )
- {
- FT_MM_Axis* axis = master->axis + n;
- T1_DesignMap* map = blend->design_map + n;
-
-
- axis->name = blend->axis_names[n];
- axis->minimum = map->design_points[0];
- axis->maximum = map->design_points[map->num_points - 1];
- }
- error = 0;
- }
- return error;
- }
-
-
- FT_LOCAL_DEF FT_Error
- T1_Set_MM_Blend( T1_Face face,
- FT_UInt num_coords,
- FT_Fixed* coords )
- {
- T1_Blend* blend = face->blend;
- FT_Error error;
- FT_UInt n, m;
-
-
- error = T1_Err_Invalid_Argument;
-
- if ( blend && blend->num_axis == num_coords )
- {
- /* recompute the weight vector from the blend coordinates */
- error = T1_Err_Ok;
-
- for ( n = 0; n < blend->num_designs; n++ )
- {
- FT_Fixed result = 0x10000L; /* 1.0 fixed */
-
-
- for ( m = 0; m < blend->num_axis; m++ )
- {
- FT_Fixed factor;
-
-
- /* get current blend axis position */
- factor = coords[m];
- if ( factor < 0 ) factor = 0;
- if ( factor > 0x10000L ) factor = 0x10000L;
-
- if ( ( n & ( 1 << m ) ) == 0 )
- factor = 0x10000L - factor;
-
- result = FT_MulFix( result, factor );
- }
- blend->weight_vector[n] = result;
- }
-
- error = T1_Err_Ok;
- }
- return error;
- }
-
-
- FT_LOCAL_DEF FT_Error
- T1_Set_MM_Design( T1_Face face,
- FT_UInt num_coords,
- FT_Long* coords )
- {
- T1_Blend* blend = face->blend;
- FT_Error error;
- FT_UInt n, p;
-
-
- error = T1_Err_Invalid_Argument;
- if ( blend && blend->num_axis == num_coords )
- {
- /* compute the blend coordinates through the blend design map */
- FT_Fixed final_blends[T1_MAX_MM_DESIGNS];
-
-
- for ( n = 0; n < blend->num_axis; n++ )
- {
- FT_Long design = coords[n];
- FT_Fixed the_blend;
- T1_DesignMap* map = blend->design_map + n;
- FT_Fixed* designs = map->design_points;
- FT_Fixed* blends = map->blend_points;
- FT_Int before = -1, after = -1;
-
- for ( p = 0; p < (FT_UInt)map->num_points; p++ )
- {
- FT_Fixed p_design = designs[p];
-
-
- /* exact match ? */
- if ( design == p_design )
- {
- the_blend = blends[p];
- goto Found;
- }
-
- if ( design < p_design )
- {
- after = p;
- break;
- }
-
- before = p;
- }
-
- /* now, interpolate if needed */
- if ( before < 0 )
- the_blend = blends[0];
-
- else if ( after < 0 )
- the_blend = blends[map->num_points - 1];
-
- else
- the_blend = FT_MulDiv( design - designs[before],
- blends [after] - blends [before],
- designs[after] - designs[before] );
-
- Found:
- final_blends[n] = the_blend;
- }
-
- error = T1_Set_MM_Blend( face, num_coords, final_blends );
- }
-
- return error;
- }
-
-
- FT_LOCAL_DEF void
- T1_Done_Blend( T1_Face face )
- {
- FT_Memory memory = face->root.memory;
- T1_Blend* blend = face->blend;
-
-
- if ( blend )
- {
- FT_UInt num_designs = blend->num_designs;
- FT_UInt num_axis = blend->num_axis;
- FT_UInt n;
-
-
- /* release design pos table */
- FREE( blend->design_pos[0] );
- for ( n = 1; n < num_designs; n++ )
- blend->design_pos[n] = 0;
-
- /* release blend `private' and `font info' dictionaries */
- FREE( blend->privates[1] );
- FREE( blend->font_infos[1] );
-
- for ( n = 0; n < num_designs; n++ )
- {
- blend->privates [n] = 0;
- blend->font_infos[n] = 0;
- }
-
- /* release weight vectors */
- FREE( blend->weight_vector );
- blend->default_weight_vector = 0;
-
- /* release axis names */
- for ( n = 0; n < num_axis; n++ )
- FREE( blend->axis_names[n] );
-
- /* release design map */
- for ( n = 0; n < num_axis; n++ )
- {
- T1_DesignMap* dmap = blend->design_map + n;
-
-
- FREE( dmap->design_points );
- dmap->num_points = 0;
- }
-
- FREE( face->blend );
- }
- }
-
-
- static void
- parse_blend_axis_types( T1_Face face,
- T1_Loader* loader )
- {
- T1_Token axis_tokens[ T1_MAX_MM_AXIS ];
- FT_Int n, num_axis;
- FT_Error error = 0;
- T1_Blend* blend;
- FT_Memory memory;
-
-
- /* take an array of objects */
- T1_ToTokenArray( &loader->parser, axis_tokens,
- T1_MAX_MM_AXIS, &num_axis );
- if ( num_axis <= 0 || num_axis > T1_MAX_MM_AXIS )
- {
- FT_ERROR(( "parse_blend_axis_types: incorrect number of axes: %d\n",
- num_axis ));
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
- /* allocate blend if necessary */
- error = t1_allocate_blend( face, 0, (FT_UInt)num_axis );
- if ( error )
- goto Exit;
-
- blend = face->blend;
- memory = face->root.memory;
-
- /* each token is an immediate containing the name of the axis */
- for ( n = 0; n < num_axis; n++ )
- {
- T1_Token* token = axis_tokens + n;
- FT_Byte* name;
- FT_Int len;
-
- /* skip first slash, if any */
- if (token->start[0] == '/')
- token->start++;
-
- len = (FT_Int)( token->limit - token->start );
- if ( len <= 0 )
- {
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
- if ( ALLOC( blend->axis_names[n], len + 1 ) )
- goto Exit;
-
- name = (FT_Byte*)blend->axis_names[n];
- MEM_Copy( name, token->start, len );
- name[len] = 0;
- }
-
- Exit:
- loader->parser.root.error = error;
- }
-
-
- static void
- parse_blend_design_positions( T1_Face face,
- T1_Loader* loader )
- {
- T1_Token design_tokens[ T1_MAX_MM_DESIGNS ];
- FT_Int num_designs;
- FT_Int num_axis;
- T1_ParserRec* parser = &loader->parser;
-
- FT_Error error = 0;
- T1_Blend* blend;
-
-
- /* get the array of design tokens - compute number of designs */
- T1_ToTokenArray( parser, design_tokens, T1_MAX_MM_DESIGNS, &num_designs );
- if ( num_designs <= 0 || num_designs > T1_MAX_MM_DESIGNS )
- {
- FT_ERROR(( "parse_blend_design_positions:" ));
- FT_ERROR(( " incorrect number of designs: %d\n",
- num_designs ));
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
- {
- FT_Byte* old_cursor = parser->root.cursor;
- FT_Byte* old_limit = parser->root.limit;
- FT_UInt n;
-
-
- blend = face->blend;
- num_axis = 0; /* make compiler happy */
-
- for ( n = 0; n < (FT_UInt)num_designs; n++ )
- {
- T1_Token axis_tokens[ T1_MAX_MM_DESIGNS ];
- T1_Token* token;
- FT_Int axis, n_axis;
-
-
- /* read axis/coordinates tokens */
- token = design_tokens + n;
- parser->root.cursor = token->start - 1;
- parser->root.limit = token->limit + 1;
- T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &n_axis );
-
- if ( n == 0 )
- {
- num_axis = n_axis;
- error = t1_allocate_blend( face, num_designs, num_axis );
- if ( error )
- goto Exit;
- blend = face->blend;
- }
- else if ( n_axis != num_axis )
- {
- FT_ERROR(( "parse_blend_design_positions: incorrect table\n" ));
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
- /* now, read each axis token into the design position */
- for ( axis = 0; axis < n_axis; axis++ )
- {
- T1_Token* token2 = axis_tokens + axis;
-
-
- parser->root.cursor = token2->start;
- parser->root.limit = token2->limit;
- blend->design_pos[n][axis] = T1_ToFixed( parser, 0 );
- }
- }
-
- loader->parser.root.cursor = old_cursor;
- loader->parser.root.limit = old_limit;
- }
-
- Exit:
- loader->parser.root.error = error;
- }
-
-
- static void
- parse_blend_design_map( T1_Face face,
- T1_Loader* loader )
- {
- FT_Error error = 0;
- T1_ParserRec* parser = &loader->parser;
- T1_Blend* blend;
- T1_Token axis_tokens[ T1_MAX_MM_AXIS ];
- FT_Int n, num_axis;
- FT_Byte* old_cursor;
- FT_Byte* old_limit;
- FT_Memory memory = face->root.memory;
-
-
- T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &num_axis );
- if ( num_axis <= 0 || num_axis > T1_MAX_MM_AXIS )
- {
- FT_ERROR(( "parse_blend_design_map: incorrect number of axes: %d\n",
- num_axis ));
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
- old_cursor = parser->root.cursor;
- old_limit = parser->root.limit;
-
- error = t1_allocate_blend( face, 0, num_axis );
- if ( error )
- goto Exit;
- blend = face->blend;
-
- /* now, read each axis design map */
- for ( n = 0; n < num_axis; n++ )
- {
- T1_DesignMap* map = blend->design_map + n;
- T1_Token* token;
- FT_Int p, num_points;
-
-
- token = axis_tokens + n;
- parser->root.cursor = token->start;
- parser->root.limit = token->limit;
-
- /* count the number of map points */
- {
- FT_Byte* ptr = token->start;
- FT_Byte* limit = token->limit;
-
-
- num_points = 0;
- for ( ; ptr < limit; ptr++ )
- if ( ptr[0] == '[' )
- num_points++;
- }
- if ( num_points <= 0 || num_points > T1_MAX_MM_MAP_POINTS )
- {
- FT_ERROR(( "parse_blend_design_map: incorrect table\n" ));
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
- /* allocate design map data */
- if ( ALLOC_ARRAY( map->design_points, num_points * 2, FT_Fixed ) )
- goto Exit;
- map->blend_points = map->design_points + num_points;
- map->num_points = (FT_Byte)num_points;
-
- for ( p = 0; p < num_points; p++ )
- {
- map->design_points[p] = T1_ToInt( parser );
- map->blend_points [p] = T1_ToFixed( parser, 0 );
- }
- }
-
- parser->root.cursor = old_cursor;
- parser->root.limit = old_limit;
-
- Exit:
- parser->root.error = error;
- }
-
-
- static void
- parse_weight_vector( T1_Face face,
- T1_Loader* loader )
- {
- FT_Error error = 0;
- T1_ParserRec* parser = &loader->parser;
- T1_Blend* blend = face->blend;
- T1_Token master;
- FT_UInt n;
- FT_Byte* old_cursor;
- FT_Byte* old_limit;
-
-
- if ( !blend || blend->num_designs == 0 )
- {
- FT_ERROR(( "parse_weight_vector: too early!\n" ));
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
- T1_ToToken( parser, &master );
- if ( master.type != t1_token_array )
- {
- FT_ERROR(( "parse_weight_vector: incorrect format!\n" ));
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
- old_cursor = parser->root.cursor;
- old_limit = parser->root.limit;
-
- parser->root.cursor = master.start;
- parser->root.limit = master.limit;
-
- for ( n = 0; n < blend->num_designs; n++ )
- {
- blend->default_weight_vector[n] =
- blend->weight_vector[n] = T1_ToFixed( parser, 0 );
- }
-
- parser->root.cursor = old_cursor;
- parser->root.limit = old_limit;
-
- Exit:
- parser->root.error = error;
- }
-
-
- /* the keyword `/shareddict' appears in some multiple master fonts */
- /* with a lot of Postscript garbage behind it (that's completely out */
- /* of spec!); we detect it and terminate the parsing */
- /* */
- static void
- parse_shared_dict( T1_Face face,
- T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
-
- FT_UNUSED( face );
-
-
- parser->root.cursor = parser->root.limit;
- parser->root.error = 0;
- }
-
-#endif /* T1_CONFIG_OPTION_NO_MM_SUPPORT */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** TYPE 1 SYMBOL PARSING *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* First of all, define the token field static variables. This is a set */
- /* of T1_Field variables used later. */
- /* */
- /*************************************************************************/
-
-
- static FT_Error
- t1_load_keyword( T1_Face face,
- T1_Loader* loader,
- T1_Field* field )
- {
- FT_Error error;
- void* dummy_object;
- void** objects;
- FT_UInt max_objects;
- T1_Blend* blend = face->blend;
-
-
- /* if the keyword has a dedicated callback, call it */
- if ( field->type == t1_field_callback )
- {
- field->reader( (FT_Face)face, loader );
- error = loader->parser.root.error;
- goto Exit;
- }
-
- /* now, the keyword is either a simple field, or a table of fields; */
- /* we are now going to take care of it */
- switch ( field->location )
- {
- case t1_field_font_info:
- dummy_object = &face->type1.font_info;
- objects = &dummy_object;
- max_objects = 0;
-
- if ( blend )
- {
- objects = (void**)blend->font_infos;
- max_objects = blend->num_designs;
- }
- break;
-
- case t1_field_private:
- dummy_object = &face->type1.private_dict;
- objects = &dummy_object;
- max_objects = 0;
-
- if ( blend )
- {
- objects = (void**)blend->privates;
- max_objects = blend->num_designs;
- }
- break;
-
- default:
- dummy_object = &face->type1;
- objects = &dummy_object;
- max_objects = 0;
- }
-
- if ( field->type == t1_field_integer_array ||
- field->type == t1_field_fixed_array )
- error = T1_Load_Field_Table( &loader->parser, field,
- objects, max_objects, 0 );
- else
- error = T1_Load_Field( &loader->parser, field,
- objects, max_objects, 0 );
-
- Exit:
- return error;
- }
-
-
- static int
- is_space( FT_Byte c )
- {
- return ( c == ' ' || c == '\t' || c == '\r' || c == '\n' );
- }
-
-
- static int
- is_alpha( FT_Byte c )
- {
- /* Note: we must accept "+" as a valid character, as it is used in */
- /* embedded type1 fonts in PDF documents. */
- /* */
- return ( isalnum( c ) || c == '.' || c == '_' || c == '-' || c == '+' );
- }
-
-
- static int
- read_binary_data( T1_ParserRec* parser,
- FT_Int* size,
- FT_Byte** base )
- {
- FT_Byte* cur;
- FT_Byte* limit = parser->root.limit;
-
-
- /* the binary data has the following format */
- /* */
- /* `size' [white*] RD white ....... ND */
- /* */
-
- T1_Skip_Spaces( parser );
- cur = parser->root.cursor;
-
- if ( cur < limit && (FT_Byte)( *cur - '0' ) < 10 )
- {
- *size = T1_ToInt( parser );
-
- T1_Skip_Spaces( parser );
- T1_Skip_Alpha ( parser ); /* `RD' or `-|' or something else */
-
- /* there is only one whitespace char after the */
- /* `RD' or `-|' token */
- *base = parser->root.cursor + 1;
-
- parser->root.cursor += *size + 1;
- return 1;
- }
-
- FT_ERROR(( "read_binary_data: invalid size field\n" ));
- parser->root.error = T1_Err_Invalid_File_Format;
- return 0;
- }
-
-
- /* we will now define the routines used to handle */
- /* the `/Encoding', `/Subrs', and `/CharStrings' */
- /* dictionaries */
-
- static void
- parse_font_name( T1_Face face,
- T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
- FT_Error error;
- FT_Memory memory = parser->root.memory;
- FT_Int len;
- FT_Byte* cur;
- FT_Byte* cur2;
- FT_Byte* limit;
-
-
- T1_Skip_Spaces( parser );
-
- cur = parser->root.cursor;
- limit = parser->root.limit;
-
- if ( cur >= limit - 1 || *cur != '/' )
- return;
-
- cur++;
- cur2 = cur;
- while ( cur2 < limit && is_alpha( *cur2 ) )
- cur2++;
-
- len = (FT_Int)( cur2 - cur );
- if ( len > 0 )
- {
- if ( ALLOC( face->type1.font_name, len + 1 ) )
- {
- parser->root.error = error;
- return;
- }
-
- MEM_Copy( face->type1.font_name, cur, len );
- face->type1.font_name[len] = '\0';
- }
- parser->root.cursor = cur2;
- }
-
-
- static void
- parse_font_bbox( T1_Face face,
- T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
- FT_Fixed temp[4];
- FT_BBox* bbox = &face->type1.font_bbox;
-
-
- (void)T1_ToFixedArray( parser, 4, temp, 0 );
- bbox->xMin = FT_RoundFix( temp[0] );
- bbox->yMin = FT_RoundFix( temp[1] );
- bbox->xMax = FT_RoundFix( temp[2] );
- bbox->yMax = FT_RoundFix( temp[3] );
- }
-
-
- static void
- parse_font_matrix( T1_Face face,
- T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
- FT_Matrix* matrix = &face->type1.font_matrix;
- FT_Vector* offset = &face->type1.font_offset;
- FT_Face root = (FT_Face)&face->root;
- FT_Fixed temp[6];
- FT_Fixed temp_scale;
-
-
- if ( matrix->xx || matrix->yx )
- /* with synthetic fonts, it's possible we get here twice */
- return;
-
- (void)T1_ToFixedArray( parser, 6, temp, 3 );
-
- temp_scale = ABS( temp[3] );
-
- /* Set Units per EM based on FontMatrix values. We set the value to */
- /* 1000 / temp_scale, because temp_scale was already multiplied by */
- /* 1000 (in t1_tofixed, from psobjs.c). */
-
- root->units_per_EM = (FT_UShort)( FT_DivFix( 1000 * 0x10000L,
- temp_scale ) >> 16 );
-
- /* we need to scale the values by 1.0/temp_scale */
- if ( temp_scale != 0x10000L )
- {
- temp[0] = FT_DivFix( temp[0], temp_scale );
- temp[1] = FT_DivFix( temp[1], temp_scale );
- temp[2] = FT_DivFix( temp[2], temp_scale );
- temp[4] = FT_DivFix( temp[4], temp_scale );
- temp[5] = FT_DivFix( temp[5], temp_scale );
- temp[3] = 0x10000L;
- }
-
- matrix->xx = temp[0];
- matrix->yx = temp[1];
- matrix->xy = temp[2];
- matrix->yy = temp[3];
-
- /* note that the offsets must be expressed in integer font units */
- offset->x = temp[4] >> 16;
- offset->y = temp[5] >> 16;
- }
-
-
- static void
- parse_encoding( T1_Face face,
- T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
- FT_Byte* cur = parser->root.cursor;
- FT_Byte* limit = parser->root.limit;
-
- PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
-
-
- /* skip whitespace */
- while ( is_space( *cur ) )
- {
- cur++;
- if ( cur >= limit )
- {
- FT_ERROR(( "parse_encoding: out of bounds!\n" ));
- parser->root.error = T1_Err_Invalid_File_Format;
- return;
- }
- }
-
- /* if we have a number, then the encoding is an array, */
- /* and we must load it now */
- if ( (FT_Byte)( *cur - '0' ) < 10 )
- {
- T1_Encoding* encode = &face->type1.encoding;
- FT_Int count, n;
- PS_Table* char_table = &loader->encoding_table;
- FT_Memory memory = parser->root.memory;
- FT_Error error;
-
-
- /* read the number of entries in the encoding, should be 256 */
- count = T1_ToInt( parser );
- if ( parser->root.error )
- return;
-
- /* we use a T1_Table to store our charnames */
- encode->num_chars = count;
- if ( ALLOC_ARRAY( encode->char_index, count, FT_Short ) ||
- ALLOC_ARRAY( encode->char_name, count, FT_String* ) ||
- ( error = psaux->ps_table_funcs->init(
- char_table, count, memory ) ) != 0 )
- {
- parser->root.error = error;
- return;
- }
-
- /* We need to `zero' out encoding_table.elements */
- for ( n = 0; n < count; n++ )
- {
- char* notdef = (char *)".notdef";
-
-
- T1_Add_Table( char_table, n, notdef, 8 );
- }
-
- /* Now, we will need to read a record of the form */
- /* ... charcode /charname ... for each entry in our table */
- /* */
- /* We simply look for a number followed by an immediate */
- /* name. Note that this ignores correctly the sequence */
- /* that is often seen in type1 fonts: */
- /* */
- /* 0 1 255 { 1 index exch /.notdef put } for dup */
- /* */
- /* used to clean the encoding array before anything else. */
- /* */
- /* We stop when we encounter a `def'. */
-
- cur = parser->root.cursor;
- limit = parser->root.limit;
- n = 0;
-
- for ( ; cur < limit; )
- {
- FT_Byte c;
-
-
- c = *cur;
-
- /* we stop when we encounter a `def' */
- if ( c == 'd' && cur + 3 < limit )
- {
- if ( cur[1] == 'e' &&
- cur[2] == 'f' &&
- is_space(cur[-1]) &&
- is_space(cur[3]) )
- {
- FT_TRACE6(( "encoding end\n" ));
- break;
- }
- }
-
- /* otherwise, we must find a number before anything else */
- if ( (FT_Byte)( c - '0' ) < 10 )
- {
- FT_Int charcode;
-
-
- parser->root.cursor = cur;
- charcode = T1_ToInt( parser );
- cur = parser->root.cursor;
-
- /* skip whitespace */
- while ( cur < limit && is_space( *cur ) )
- cur++;
-
- if ( cur < limit && *cur == '/' )
- {
- /* bingo, we have an immediate name -- it must be a */
- /* character name */
- FT_Byte* cur2 = cur + 1;
- FT_Int len;
-
-
- while ( cur2 < limit && is_alpha( *cur2 ) )
- cur2++;
-
- len = (FT_Int)( cur2 - cur - 1 );
-
- parser->root.error = T1_Add_Table( char_table, charcode,
- cur + 1, len + 1 );
- char_table->elements[charcode][len] = '\0';
- if ( parser->root.error )
- return;
-
- cur = cur2;
- }
- }
- else
- cur++;
- }
-
- face->type1.encoding_type = t1_encoding_array;
- parser->root.cursor = cur;
- }
- /* Otherwise, we should have either `StandardEncoding' or */
- /* `ExpertEncoding' */
- else
- {
- if ( cur + 17 < limit &&
- strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
- face->type1.encoding_type = t1_encoding_standard;
-
- else if ( cur + 15 < limit &&
- strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
- face->type1.encoding_type = t1_encoding_expert;
-
- else
- {
- FT_ERROR(( "parse_encoding: invalid token!\n" ));
- parser->root.error = T1_Err_Invalid_File_Format;
- }
- }
- }
-
-
- static void
- parse_subrs( T1_Face face,
- T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
- PS_Table* table = &loader->subrs;
- FT_Memory memory = parser->root.memory;
- FT_Error error;
- FT_Int n;
-
- PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
-
-
- loader->num_subrs = T1_ToInt( parser );
- if ( parser->root.error )
- return;
-
- /* position the parser right before the `dup' of the first subr */
- T1_Skip_Spaces( parser );
- T1_Skip_Alpha( parser ); /* `array' */
- T1_Skip_Spaces( parser );
-
- /* initialize subrs array */
- error = psaux->ps_table_funcs->init( table, loader->num_subrs, memory );
- if ( error )
- goto Fail;
-
- /* the format is simple: */
- /* */
- /* `index' + binary data */
- /* */
-
- for ( n = 0; n < loader->num_subrs; n++ )
- {
- FT_Int index, size;
- FT_Byte* base;
-
-
- /* If the next token isn't `dup', we are also done. This */
- /* happens when there are `holes' in the Subrs array. */
- if ( strncmp( (char*)parser->root.cursor, "dup", 3 ) != 0 )
- break;
-
- index = T1_ToInt( parser );
-
- if ( !read_binary_data( parser, &size, &base ) )
- return;
-
- /* The binary string is followed by one token, e.g. `NP' */
- /* (bound to `noaccess put') or by two separate tokens: */
- /* `noaccess' & `put'. We position the parser right */
- /* before the next `dup', if any. */
- T1_Skip_Spaces( parser );
- T1_Skip_Alpha( parser ); /* `NP' or `I' or `noaccess' */
- T1_Skip_Spaces( parser );
-
- if ( strncmp( (char*)parser->root.cursor, "put", 3 ) == 0 )
- {
- T1_Skip_Alpha( parser ); /* skip `put' */
- T1_Skip_Spaces( parser );
- }
-
- /* some fonts use a value of -1 for lenIV to indicate that */
- /* the charstrings are unencoded */
- /* */
- /* thanks to Tom Kacvinsky for pointing this out */
- /* */
- if ( face->type1.private_dict.lenIV >= 0 )
- {
- psaux->t1_decrypt( base, size, 4330 );
- size -= face->type1.private_dict.lenIV;
- base += face->type1.private_dict.lenIV;
- }
-
- error = T1_Add_Table( table, index, base, size );
- if ( error )
- goto Fail;
- }
- return;
-
- Fail:
- parser->root.error = error;
- }
-
-
- static void
- parse_charstrings( T1_Face face,
- T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
- PS_Table* code_table = &loader->charstrings;
- PS_Table* name_table = &loader->glyph_names;
- PS_Table* swap_table = &loader->swap_table;
- FT_Memory memory = parser->root.memory;
- FT_Error error;
-
- PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
-
- FT_Byte* cur;
- FT_Byte* limit = parser->root.limit;
- FT_Int n;
- FT_UInt notdef_index = 0;
- FT_Byte notdef_found = 0;
-
-
- if ( loader->num_glyphs )
- /* with synthetic fonts, it's possible we get here twice */
- return;
-
- loader->num_glyphs = T1_ToInt( parser );
- if ( parser->root.error )
- return;
-
- /* initialize tables (leaving room for addition of .notdef, */
- /* if necessary). */
-
- error = psaux->ps_table_funcs->init( code_table,
- loader->num_glyphs + 1,
- memory );
- if ( error )
- goto Fail;
-
- error = psaux->ps_table_funcs->init( name_table,
- loader->num_glyphs + 1,
- memory );
- if ( error )
- goto Fail;
-
- /* Initialize table for swapping index notdef_index and */
- /* index 0 names and codes (if necessary). */
-
- error = psaux->ps_table_funcs->init( swap_table, 4, memory );
-
- if ( error )
- goto Fail;
-
-
- n = 0;
- for (;;)
- {
- FT_Int size;
- FT_Byte* base;
-
-
- /* the format is simple: */
- /* `/glyphname' + binary data */
- /* */
- /* note that we stop when we find a `def' */
- /* */
- T1_Skip_Spaces( parser );
-
- cur = parser->root.cursor;
- if ( cur >= limit )
- break;
-
- /* we stop when we find a `def' or `end' keyword */
- if ( *cur == 'd' &&
- cur + 3 < limit &&
- cur[1] == 'e' &&
- cur[2] == 'f' )
- break;
-
- if ( *cur == 'e' &&
- cur + 3 < limit &&
- cur[1] == 'n' &&
- cur[2] == 'd' )
- break;
-
- if ( *cur != '/' )
- T1_Skip_Alpha( parser );
- else
- {
- FT_Byte* cur2 = cur + 1;
- FT_Int len;
-
-
- while ( cur2 < limit && is_alpha( *cur2 ) )
- cur2++;
- len = (FT_Int)( cur2 - cur - 1 );
-
- error = T1_Add_Table( name_table, n, cur + 1, len + 1 );
- if ( error )
- goto Fail;
-
- /* add a trailing zero to the name table */
- name_table->elements[n][len] = '\0';
-
- /* record index of /.notdef */
- if ( strcmp( (const char*)".notdef",
- (const char*)(name_table->elements[n]) ) == 0 )
- {
- notdef_index = n;
- notdef_found = 1;
- }
-
- parser->root.cursor = cur2;
- if ( !read_binary_data( parser, &size, &base ) )
- return;
-
- if ( face->type1.private_dict.lenIV >= 0 )
- {
- psaux->t1_decrypt( base, size, 4330 );
- size -= face->type1.private_dict.lenIV;
- base += face->type1.private_dict.lenIV;
- }
-
- error = T1_Add_Table( code_table, n, base, size );
- if ( error )
- goto Fail;
-
- n++;
- if ( n >= loader->num_glyphs )
- break;
- }
- }
-
- loader->num_glyphs = n;
-
- /* if /.notdef is found but does not occupy index 0, do our magic. */
- if ( strcmp( (const char*)".notdef",
- (const char*)name_table->elements[0] ) &&
- notdef_found )
- {
- /* Swap glyph in index 0 with /.notdef glyph. First, add index 0 */
- /* name and code entries to swap_table. Then place notdef_index name */
- /* and code entries into swap_table. Then swap name and code */
- /* entries at indices notdef_index and 0 using values stored in */
- /* swap_table. */
-
- /* Index 0 name */
- error = T1_Add_Table( swap_table, 0,
- name_table->elements[0],
- name_table->lengths [0] );
- if ( error )
- goto Fail;
-
- /* Index 0 code */
- error = T1_Add_Table( swap_table, 1,
- code_table->elements[0],
- code_table->lengths [0] );
- if ( error )
- goto Fail;
-
- /* Index notdef_index name */
- error = T1_Add_Table( swap_table, 2,
- name_table->elements[notdef_index],
- name_table->lengths [notdef_index] );
- if ( error )
- goto Fail;
-
- /* Index notdef_index code */
- error = T1_Add_Table( swap_table, 3,
- code_table->elements[notdef_index],
- code_table->lengths [notdef_index] );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( name_table, notdef_index,
- swap_table->elements[0],
- swap_table->lengths [0] );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( code_table, notdef_index,
- swap_table->elements[1],
- swap_table->lengths [1] );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( name_table, 0,
- swap_table->elements[2],
- swap_table->lengths [2] );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( code_table, 0,
- swap_table->elements[3],
- swap_table->lengths [3] );
- if ( error )
- goto Fail;
-
- }
- else if ( !notdef_found )
- {
-
- /* notdef_index is already 0, or /.notdef is undefined in */
- /* charstrings dictionary. Worry about /.notdef undefined. */
- /* We take index 0 and add it to the end of the table(s) */
- /* and add our own /.notdef glyph to index 0. */
-
- /* 0 333 hsbw endchar */
- FT_Byte notdef_glyph[] = {0x8B, 0xF7, 0xE1, 0x0D, 0x0E};
- char* notdef_name = (char *)".notdef";
-
-
- error = T1_Add_Table( swap_table, 0,
- name_table->elements[0],
- name_table->lengths [0] );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( swap_table, 1,
- code_table->elements[0],
- code_table->lengths [0] );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( name_table, 0, notdef_name, 8 );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( code_table, 0, notdef_glyph, 5 );
-
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( name_table, n,
- swap_table->elements[0],
- swap_table->lengths [0] );
- if ( error )
- goto Fail;
-
- error = T1_Add_Table( code_table, n,
- swap_table->elements[1],
- swap_table->lengths [1] );
- if ( error )
- goto Fail;
-
- /* we added a glyph. */
- loader->num_glyphs = n + 1;
-
- }
-
-
- return;
-
- Fail:
- parser->root.error = error;
- }
-
-
- static
- const T1_Field t1_keywords[] =
- {
-
-#include "t1tokens.h"
-
- /* now add the special functions... */
- T1_FIELD_CALLBACK( "FontName", parse_font_name )
- T1_FIELD_CALLBACK( "FontBBox", parse_font_bbox )
- T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix )
- T1_FIELD_CALLBACK( "Encoding", parse_encoding )
- T1_FIELD_CALLBACK( "Subrs", parse_subrs )
- T1_FIELD_CALLBACK( "CharStrings", parse_charstrings )
-
-#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
- T1_FIELD_CALLBACK( "BlendDesignPositions", parse_blend_design_positions )
- T1_FIELD_CALLBACK( "BlendDesignMap", parse_blend_design_map )
- T1_FIELD_CALLBACK( "BlendAxisTypes", parse_blend_axis_types )
- T1_FIELD_CALLBACK( "WeightVector", parse_weight_vector )
- T1_FIELD_CALLBACK( "shareddict", parse_shared_dict )
-#endif
-
- { 0, t1_field_cid_info, t1_field_none, 0, 0, 0, 0, 0 }
- };
-
-
- static FT_Error
- parse_dict( T1_Face face,
- T1_Loader* loader,
- FT_Byte* base,
- FT_Long size )
- {
- T1_ParserRec* parser = &loader->parser;
-
-
- parser->root.cursor = base;
- parser->root.limit = base + size;
- parser->root.error = 0;
-
- {
- FT_Byte* cur = base;
- FT_Byte* limit = cur + size;
-
-
- for ( ; cur < limit; cur++ )
- {
- /* look for `FontDirectory', which causes problems on some fonts */
- if ( *cur == 'F' && cur + 25 < limit &&
- strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
- {
- FT_Byte* cur2;
-
-
- /* skip the `FontDirectory' keyword */
- cur += 13;
- cur2 = cur;
-
- /* lookup the `known' keyword */
- while ( cur < limit && *cur != 'k' &&
- strncmp( (char*)cur, "known", 5 ) )
- cur++;
-
- if ( cur < limit )
- {
- T1_Token token;
-
-
- /* skip the `known' keyword and the token following it */
- cur += 5;
- loader->parser.root.cursor = cur;
- T1_ToToken( &loader->parser, &token );
-
- /* if the last token was an array, skip it! */
- if ( token.type == t1_token_array )
- cur2 = parser->root.cursor;
- }
- cur = cur2;
- }
- /* look for immediates */
- else if ( *cur == '/' && cur + 2 < limit )
- {
- FT_Byte* cur2;
- FT_Int len;
-
-
- cur++;
- cur2 = cur;
- while ( cur2 < limit && is_alpha( *cur2 ) )
- cur2++;
-
- len = (FT_Int)( cur2 - cur );
- if ( len > 0 && len < 22 )
- {
- {
- /* now, compare the immediate name to the keyword table */
- T1_Field* keyword = (T1_Field*)t1_keywords;
-
-
- for (;;)
- {
- FT_Byte* name;
-
-
- name = (FT_Byte*)keyword->ident;
- if ( !name )
- break;
-
- if ( cur[0] == name[0] &&
- len == (FT_Int)strlen( (const char*)name ) )
- {
- FT_Int n;
-
-
- for ( n = 1; n < len; n++ )
- if ( cur[n] != name[n] )
- break;
-
- if ( n >= len )
- {
- /* we found it -- run the parsing callback! */
- parser->root.cursor = cur2;
- T1_Skip_Spaces( parser );
- parser->root.error = t1_load_keyword( face,
- loader,
- keyword );
- if ( parser->root.error )
- return parser->root.error;
-
- cur = parser->root.cursor;
- break;
- }
- }
- keyword++;
- }
- }
- }
- }
- }
- }
- return parser->root.error;
- }
-
-
- static void
- t1_init_loader( T1_Loader* loader,
- T1_Face face )
- {
- FT_UNUSED( face );
-
- MEM_Set( loader, 0, sizeof ( *loader ) );
- loader->num_glyphs = 0;
- loader->num_chars = 0;
-
- /* initialize the tables -- simply set their `init' field to 0 */
- loader->encoding_table.init = 0;
- loader->charstrings.init = 0;
- loader->glyph_names.init = 0;
- loader->subrs.init = 0;
- loader->swap_table.init = 0;
- loader->fontdata = 0;
- }
-
-
- static void
- t1_done_loader( T1_Loader* loader )
- {
- T1_ParserRec* parser = &loader->parser;
-
-
- /* finalize tables */
- T1_Release_Table( &loader->encoding_table );
- T1_Release_Table( &loader->charstrings );
- T1_Release_Table( &loader->glyph_names );
- T1_Release_Table( &loader->swap_table );
- T1_Release_Table( &loader->subrs );
-
- /* finalize parser */
- T1_Finalize_Parser( parser );
- }
-
-
- FT_LOCAL_DEF FT_Error
- T1_Open_Face( T1_Face face )
- {
- T1_Loader loader;
- T1_ParserRec* parser;
- T1_Font* type1 = &face->type1;
- FT_Error error;
-
- PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
-
-
- t1_init_loader( &loader, face );
-
- /* default lenIV */
- type1->private_dict.lenIV = 4;
-
- parser = &loader.parser;
- error = T1_New_Parser( parser,
- face->root.stream,
- face->root.memory,
- psaux );
- if ( error )
- goto Exit;
-
- error = parse_dict( face, &loader, parser->base_dict, parser->base_len );
- if ( error )
- goto Exit;
-
- error = T1_Get_Private_Dict( parser, psaux );
- if ( error )
- goto Exit;
-
- error = parse_dict( face, &loader, parser->private_dict,
- parser->private_len );
- if ( error )
- goto Exit;
-
- /* now, propagate the subrs, charstrings, and glyphnames tables */
- /* to the Type1 data */
- type1->num_glyphs = loader.num_glyphs;
-
- if ( loader.subrs.init )
- {
- loader.subrs.init = 0;
- type1->num_subrs = loader.num_subrs;
- type1->subrs_block = loader.subrs.block;
- type1->subrs = loader.subrs.elements;
- type1->subrs_len = loader.subrs.lengths;
- }
-
- if ( !loader.charstrings.init )
- {
- FT_ERROR(( "T1_Open_Face: no charstrings array in face!\n" ));
- error = T1_Err_Invalid_File_Format;
- }
-
- loader.charstrings.init = 0;
- type1->charstrings_block = loader.charstrings.block;
- type1->charstrings = loader.charstrings.elements;
- type1->charstrings_len = loader.charstrings.lengths;
-
- /* we copy the glyph names `block' and `elements' fields; */
- /* the `lengths' field must be released later */
- type1->glyph_names_block = loader.glyph_names.block;
- type1->glyph_names = (FT_String**)loader.glyph_names.elements;
- loader.glyph_names.block = 0;
- loader.glyph_names.elements = 0;
-
- /* we must now build type1.encoding when we have a custom */
- /* array.. */
- if ( type1->encoding_type == t1_encoding_array )
- {
- FT_Int charcode, index, min_char, max_char;
- FT_Byte* char_name;
- FT_Byte* glyph_name;
-
-
- /* OK, we do the following: for each element in the encoding */
- /* table, look up the index of the glyph having the same name */
- /* the index is then stored in type1.encoding.char_index, and */
- /* a the name to type1.encoding.char_name */
-
- min_char = +32000;
- max_char = -32000;
-
- charcode = 0;
- for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
- {
- type1->encoding.char_index[charcode] = 0;
- type1->encoding.char_name [charcode] = (char *)".notdef";
-
- char_name = loader.encoding_table.elements[charcode];
- if ( char_name )
- for ( index = 0; index < type1->num_glyphs; index++ )
- {
- glyph_name = (FT_Byte*)type1->glyph_names[index];
- if ( strcmp( (const char*)char_name,
- (const char*)glyph_name ) == 0 )
- {
- type1->encoding.char_index[charcode] = (FT_UShort)index;
- type1->encoding.char_name [charcode] = (char*)glyph_name;
-
- /* Change min/max encoded char only if glyph name is */
- /* not /.notdef */
- if ( strcmp( (const char*)".notdef",
- (const char*)glyph_name ) != 0 )
- {
- if (charcode < min_char) min_char = charcode;
- if (charcode > max_char) max_char = charcode;
- }
- break;
- }
- }
- }
- type1->encoding.code_first = min_char;
- type1->encoding.code_last = max_char;
- type1->encoding.num_chars = loader.num_chars;
- }
-
- Exit:
- t1_done_loader( &loader );
- return error;
- }
-
-
-/* END */
projects / rrdtool.git / blobdiff