ref: 369d8be97f537c56f2dbd1d3bd23aba74dc24cea
dir: /src/type1/t1load.c/
/****************************************************************************
*
* t1load.c
*
* Type 1 font loader (body).
*
* Copyright (C) 1996-2021 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 time to
* generate a table of keywords (with pointers to the associated
* callback functions).
*
* 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 <freetype/internal/ftdebug.h>
#include FT_CONFIG_CONFIG_H
#include <freetype/ftmm.h>
#include <freetype/internal/t1types.h>
#include <freetype/internal/ftcalc.h>
#include <freetype/internal/fthash.h>
#include "t1load.h"
#include "t1errors.h"
#ifdef FT_CONFIG_OPTION_INCREMENTAL
#define IS_INCREMENTAL FT_BOOL( face->root.internal->incremental_interface )
#else
#define IS_INCREMENTAL 0
#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 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 )
{
PS_Blend blend;
FT_Memory memory = face->root.memory;
FT_Error error = FT_Err_Ok;
blend = face->blend;
if ( !blend )
{
if ( FT_NEW( blend ) )
goto Exit;
blend->num_default_design_vector = 0;
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 ( FT_NEW_ARRAY( blend->font_infos[1], num_designs ) ||
FT_NEW_ARRAY( blend->privates [1], num_designs ) ||
FT_NEW_ARRAY( blend->bboxes [1], num_designs ) ||
FT_NEW_ARRAY( blend->weight_vector, num_designs * 2 ) )
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;
blend->bboxes [0] = &face->type1.font_bbox;
for ( nn = 2; nn <= num_designs; nn++ )
{
blend->font_infos[nn] = blend->font_infos[nn - 1] + 1;
blend->privates [nn] = blend->privates [nn - 1] + 1;
blend->bboxes [nn] = blend->bboxes [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 ( FT_NEW_ARRAY( blend->design_pos[0], num_designs * num_axis ) )
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 = FT_THROW( Invalid_File_Format );
goto Exit;
}
FT_LOCAL_DEF( FT_Error )
T1_Get_Multi_Master( T1_Face face,
FT_Multi_Master* master )
{
PS_Blend blend = face->blend;
FT_UInt n;
FT_Error error;
error = FT_THROW( 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;
PS_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 = FT_Err_Ok;
}
return error;
}
/**************************************************************************
*
* Given a normalized (blend) coordinate, figure out the design
* coordinate appropriate for that value.
*/
static FT_Fixed
mm_axis_unmap( PS_DesignMap axismap,
FT_Fixed ncv )
{
int j;
if ( ncv <= axismap->blend_points[0] )
return INT_TO_FIXED( axismap->design_points[0] );
for ( j = 1; j < axismap->num_points; j++ )
{
if ( ncv <= axismap->blend_points[j] )
return INT_TO_FIXED( axismap->design_points[j - 1] ) +
( axismap->design_points[j] - axismap->design_points[j - 1] ) *
FT_DivFix( ncv - axismap->blend_points[j - 1],
axismap->blend_points[j] -
axismap->blend_points[j - 1] );
}
return INT_TO_FIXED( axismap->design_points[axismap->num_points - 1] );
}
/**************************************************************************
*
* Given a vector of weights, one for each design, figure out the
* normalized axis coordinates which gave rise to those weights.
*/
static void
mm_weights_unmap( FT_Fixed* weights,
FT_Fixed* axiscoords,
FT_UInt axis_count )
{
FT_ASSERT( axis_count <= T1_MAX_MM_AXIS );
if ( axis_count == 1 )
axiscoords[0] = weights[1];
else if ( axis_count == 2 )
{
axiscoords[0] = weights[3] + weights[1];
axiscoords[1] = weights[3] + weights[2];
}
else if ( axis_count == 3 )
{
axiscoords[0] = weights[7] + weights[5] + weights[3] + weights[1];
axiscoords[1] = weights[7] + weights[6] + weights[3] + weights[2];
axiscoords[2] = weights[7] + weights[6] + weights[5] + weights[4];
}
else
{
axiscoords[0] = weights[15] + weights[13] + weights[11] + weights[9] +
weights[7] + weights[5] + weights[3] + weights[1];
axiscoords[1] = weights[15] + weights[14] + weights[11] + weights[10] +
weights[7] + weights[6] + weights[3] + weights[2];
axiscoords[2] = weights[15] + weights[14] + weights[13] + weights[12] +
weights[7] + weights[6] + weights[5] + weights[4];
axiscoords[3] = weights[15] + weights[14] + weights[13] + weights[12] +
weights[11] + weights[10] + weights[9] + weights[8];
}
}
/**************************************************************************
*
* Just a wrapper around T1_Get_Multi_Master to support the different
* arguments needed by the GX var distortable fonts.
*/
FT_LOCAL_DEF( FT_Error )
T1_Get_MM_Var( T1_Face face,
FT_MM_Var* *master )
{
FT_Memory memory = face->root.memory;
FT_MM_Var *mmvar = NULL;
FT_Multi_Master mmaster;
FT_Error error;
FT_UInt i;
FT_Fixed axiscoords[T1_MAX_MM_AXIS];
PS_Blend blend = face->blend;
FT_UShort* axis_flags;
FT_Offset mmvar_size;
FT_Offset axis_flags_size;
FT_Offset axis_size;
error = T1_Get_Multi_Master( face, &mmaster );
if ( error )
goto Exit;
/* the various `*_size' variables, which we also use as */
/* offsets into the `mmvar' array, must be multiples of the */
/* pointer size (except the last one); without such an */
/* alignment there might be runtime errors due to */
/* misaligned addresses */
#undef ALIGN_SIZE
#define ALIGN_SIZE( n ) \
( ( (n) + sizeof (void*) - 1 ) & ~( sizeof (void*) - 1 ) )
mmvar_size = ALIGN_SIZE( sizeof ( FT_MM_Var ) );
axis_flags_size = ALIGN_SIZE( mmaster.num_axis *
sizeof ( FT_UShort ) );
axis_size = mmaster.num_axis * sizeof ( FT_Var_Axis );
if ( FT_ALLOC( mmvar, mmvar_size +
axis_flags_size +
axis_size ) )
goto Exit;
mmvar->num_axis = mmaster.num_axis;
mmvar->num_designs = mmaster.num_designs;
mmvar->num_namedstyles = 0; /* Not supported */
/* while axis flags are meaningless here, we have to provide the array */
/* to make `FT_Get_Var_Axis_Flags' work: the function expects that the */
/* values directly follow the data of `FT_MM_Var' */
axis_flags = (FT_UShort*)( (char*)mmvar + mmvar_size );
for ( i = 0; i < mmaster.num_axis; i++ )
axis_flags[i] = 0;
mmvar->axis = (FT_Var_Axis*)( (char*)axis_flags + axis_flags_size );
mmvar->namedstyle = NULL;
for ( i = 0; i < mmaster.num_axis; i++ )
{
mmvar->axis[i].name = mmaster.axis[i].name;
mmvar->axis[i].minimum = INT_TO_FIXED( mmaster.axis[i].minimum );
mmvar->axis[i].maximum = INT_TO_FIXED( mmaster.axis[i].maximum );
mmvar->axis[i].strid = ~0U; /* Does not apply */
mmvar->axis[i].tag = ~0U; /* Does not apply */
if ( !mmvar->axis[i].name )
continue;
if ( ft_strcmp( mmvar->axis[i].name, "Weight" ) == 0 )
mmvar->axis[i].tag = FT_MAKE_TAG( 'w', 'g', 'h', 't' );
else if ( ft_strcmp( mmvar->axis[i].name, "Width" ) == 0 )
mmvar->axis[i].tag = FT_MAKE_TAG( 'w', 'd', 't', 'h' );
else if ( ft_strcmp( mmvar->axis[i].name, "OpticalSize" ) == 0 )
mmvar->axis[i].tag = FT_MAKE_TAG( 'o', 'p', 's', 'z' );
}
mm_weights_unmap( blend->default_weight_vector,
axiscoords,
blend->num_axis );
for ( i = 0; i < mmaster.num_axis; i++ )
mmvar->axis[i].def = mm_axis_unmap( &blend->design_map[i],
axiscoords[i] );
*master = mmvar;
Exit:
return error;
}
static FT_Error
t1_set_mm_blend( T1_Face face,
FT_UInt num_coords,
FT_Fixed* coords )
{
PS_Blend blend = face->blend;
FT_UInt n, m;
FT_Bool have_diff = 0;
if ( !blend )
return FT_THROW( Invalid_Argument );
if ( num_coords > blend->num_axis )
num_coords = blend->num_axis;
/* recompute the weight vector from the blend coordinates */
for ( n = 0; n < blend->num_designs; n++ )
{
FT_Fixed result = 0x10000L; /* 1.0 fixed */
FT_Fixed factor;
for ( m = 0; m < blend->num_axis; m++ )
{
/* use a default value if we don't have a coordinate */
if ( m >= num_coords )
{
result >>= 1;
continue;
}
/* get current blend axis position */
factor = coords[m];
if ( ( n & ( 1 << m ) ) == 0 )
factor = 0x10000L - factor;
if ( factor <= 0 )
{
result = 0;
break;
}
else if ( factor >= 0x10000L )
continue;
result = FT_MulFix( result, factor );
}
if ( blend->weight_vector[n] != result )
{
blend->weight_vector[n] = result;
have_diff = 1;
}
}
/* return value -1 indicates `no change' */
return have_diff ? FT_Err_Ok : -1;
}
FT_LOCAL_DEF( FT_Error )
T1_Set_MM_Blend( T1_Face face,
FT_UInt num_coords,
FT_Fixed* coords )
{
FT_Error error;
error = t1_set_mm_blend( face, num_coords, coords );
if ( error )
return error;
if ( num_coords )
face->root.face_flags |= FT_FACE_FLAG_VARIATION;
else
face->root.face_flags &= ~FT_FACE_FLAG_VARIATION;
return FT_Err_Ok;
}
FT_LOCAL_DEF( FT_Error )
T1_Get_MM_Blend( T1_Face face,
FT_UInt num_coords,
FT_Fixed* coords )
{
PS_Blend blend = face->blend;
FT_Fixed axiscoords[4];
FT_UInt i, nc;
if ( !blend )
return FT_THROW( Invalid_Argument );
mm_weights_unmap( blend->weight_vector,
axiscoords,
blend->num_axis );
nc = num_coords;
if ( num_coords > blend->num_axis )
{
FT_TRACE2(( "T1_Get_MM_Blend: only using first %d of %d coordinates\n",
blend->num_axis, num_coords ));
nc = blend->num_axis;
}
for ( i = 0; i < nc; i++ )
coords[i] = axiscoords[i];
for ( ; i < num_coords; i++ )
coords[i] = 0x8000;
return FT_Err_Ok;
}
FT_LOCAL_DEF( FT_Error )
T1_Set_MM_WeightVector( T1_Face face,
FT_UInt len,
FT_Fixed* weightvector )
{
PS_Blend blend = face->blend;
FT_UInt i, n;
if ( !blend )
return FT_THROW( Invalid_Argument );
if ( !len && !weightvector )
{
for ( i = 0; i < blend->num_designs; i++ )
blend->weight_vector[i] = blend->default_weight_vector[i];
}
else
{
if ( !weightvector )
return FT_THROW( Invalid_Argument );
n = len < blend->num_designs ? len : blend->num_designs;
for ( i = 0; i < n; i++ )
blend->weight_vector[i] = weightvector[i];
for ( ; i < blend->num_designs; i++ )
blend->weight_vector[i] = (FT_Fixed)0;
if ( len )
face->root.face_flags |= FT_FACE_FLAG_VARIATION;
else
face->root.face_flags &= ~FT_FACE_FLAG_VARIATION;
}
return FT_Err_Ok;
}
FT_LOCAL_DEF( FT_Error )
T1_Get_MM_WeightVector( T1_Face face,
FT_UInt* len,
FT_Fixed* weightvector )
{
PS_Blend blend = face->blend;
FT_UInt i;
if ( !blend )
return FT_THROW( Invalid_Argument );
if ( *len < blend->num_designs )
{
*len = blend->num_designs;
return FT_THROW( Invalid_Argument );
}
for ( i = 0; i < blend->num_designs; i++ )
weightvector[i] = blend->weight_vector[i];
for ( ; i < *len; i++ )
weightvector[i] = (FT_Fixed)0;
*len = blend->num_designs;
return FT_Err_Ok;
}
FT_LOCAL_DEF( FT_Error )
T1_Set_MM_Design( T1_Face face,
FT_UInt num_coords,
FT_Long* coords )
{
FT_Error error;
PS_Blend blend = face->blend;
FT_UInt n, p;
FT_Fixed final_blends[T1_MAX_MM_DESIGNS];
if ( !blend )
return FT_THROW( Invalid_Argument );
if ( num_coords > blend->num_axis )
num_coords = blend->num_axis;
/* compute the blend coordinates through the blend design map */
for ( n = 0; n < blend->num_axis; n++ )
{
FT_Long design;
FT_Fixed the_blend;
PS_DesignMap map = blend->design_map + n;
FT_Long* designs = map->design_points;
FT_Fixed* blends = map->blend_points;
FT_Int before = -1, after = -1;
/* use a default value if we don't have a coordinate */
if ( n < num_coords )
design = coords[n];
else
design = ( designs[map->num_points - 1] - designs[0] ) / 2;
for ( p = 0; p < (FT_UInt)map->num_points; p++ )
{
FT_Long p_design = designs[p];
/* exact match? */
if ( design == p_design )
{
the_blend = blends[p];
goto Found;
}
if ( design < p_design )
{
after = (FT_Int)p;
break;
}
before = (FT_Int)p;
}
/* now interpolate if necessary */
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, blend->num_axis, final_blends );
if ( error )
return error;
if ( num_coords )
face->root.face_flags |= FT_FACE_FLAG_VARIATION;
else
face->root.face_flags &= ~FT_FACE_FLAG_VARIATION;
return FT_Err_Ok;
}
/* MM fonts don't have named instances, so only the design is reset */
FT_LOCAL_DEF( FT_Error )
T1_Reset_MM_Blend( T1_Face face,
FT_UInt instance_index )
{
FT_UNUSED( instance_index );
return T1_Set_MM_Blend( face, 0, NULL );
}
/**************************************************************************
*
* Just a wrapper around T1_Set_MM_Design to support the different
* arguments needed by the GX var distortable fonts.
*/
FT_LOCAL_DEF( FT_Error )
T1_Set_Var_Design( T1_Face face,
FT_UInt num_coords,
FT_Fixed* coords )
{
FT_Long lcoords[T1_MAX_MM_AXIS];
FT_UInt i;
if ( num_coords > T1_MAX_MM_AXIS )
num_coords = T1_MAX_MM_AXIS;
for ( i = 0; i < num_coords; i++ )
lcoords[i] = FIXED_TO_INT( coords[i] );
return T1_Set_MM_Design( face, num_coords, lcoords );
}
FT_LOCAL_DEF( FT_Error )
T1_Get_Var_Design( T1_Face face,
FT_UInt num_coords,
FT_Fixed* coords )
{
PS_Blend blend = face->blend;
FT_Fixed axiscoords[4];
FT_UInt i, nc;
if ( !blend )
return FT_THROW( Invalid_Argument );
mm_weights_unmap( blend->weight_vector,
axiscoords,
blend->num_axis );
nc = num_coords;
if ( num_coords > blend->num_axis )
{
FT_TRACE2(( "T1_Get_Var_Design:"
" only using first %d of %d coordinates\n",
blend->num_axis, num_coords ));
nc = blend->num_axis;
}
for ( i = 0; i < nc; i++ )
coords[i] = mm_axis_unmap( &blend->design_map[i], axiscoords[i] );
for ( ; i < num_coords; i++ )
coords[i] = 0;
return FT_Err_Ok;
}
FT_LOCAL_DEF( void )
T1_Done_Blend( T1_Face face )
{
FT_Memory memory = face->root.memory;
PS_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 */
FT_FREE( blend->design_pos[0] );
for ( n = 1; n < num_designs; n++ )
blend->design_pos[n] = NULL;
/* release blend `private' and `font info' dictionaries */
FT_FREE( blend->privates[1] );
FT_FREE( blend->font_infos[1] );
FT_FREE( blend->bboxes[1] );
for ( n = 0; n < num_designs; n++ )
{
blend->privates [n] = NULL;
blend->font_infos[n] = NULL;
blend->bboxes [n] = NULL;
}
/* release weight vectors */
FT_FREE( blend->weight_vector );
blend->default_weight_vector = NULL;
/* release axis names */
for ( n = 0; n < num_axis; n++ )
FT_FREE( blend->axis_names[n] );
/* release design map */
for ( n = 0; n < num_axis; n++ )
{
PS_DesignMap dmap = blend->design_map + n;
FT_FREE( dmap->design_points );
dmap->num_points = 0;
}
FT_FREE( face->blend );
}
}
static void
parse_blend_axis_types( T1_Face face,
T1_Loader loader )
{
T1_TokenRec axis_tokens[T1_MAX_MM_AXIS];
FT_Int n, num_axis;
FT_Error error = FT_Err_Ok;
PS_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 )
{
error = FT_ERR( Ignore );
goto Exit;
}
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 = FT_THROW( Invalid_File_Format );
goto Exit;
}
/* allocate blend if necessary */
error = t1_allocate_blend( face, 0, (FT_UInt)num_axis );
if ( error )
goto Exit;
FT_TRACE4(( " [" ));
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_UInt len;
/* skip first slash, if any */
if ( token->start[0] == '/' )
token->start++;
len = (FT_UInt)( token->limit - token->start );
if ( len == 0 )
{
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
FT_TRACE4(( " /%.*s", len, token->start ));
name = (FT_Byte*)blend->axis_names[n];
if ( name )
{
FT_TRACE0(( "parse_blend_axis_types:"
" overwriting axis name `%s' with `%.*s'\n",
name, len, token->start ));
FT_FREE( name );
}
if ( FT_ALLOC( blend->axis_names[n], len + 1 ) )
goto Exit;
name = (FT_Byte*)blend->axis_names[n];
FT_MEM_COPY( name, token->start, len );
name[len] = '\0';
}
FT_TRACE4(( "]\n" ));
Exit:
loader->parser.root.error = error;
}
static void
parse_blend_design_positions( T1_Face face,
T1_Loader loader )
{
T1_TokenRec design_tokens[T1_MAX_MM_DESIGNS];
FT_Int num_designs;
FT_Int num_axis;
T1_Parser parser = &loader->parser;
FT_Error error = FT_Err_Ok;
PS_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 )
{
error = FT_ERR( Ignore );
goto Exit;
}
if ( num_designs == 0 || num_designs > T1_MAX_MM_DESIGNS )
{
FT_ERROR(( "parse_blend_design_positions:"
" incorrect number of designs: %d\n",
num_designs ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
{
FT_Byte* old_cursor = parser->root.cursor;
FT_Byte* old_limit = parser->root.limit;
FT_Int n;
blend = face->blend;
num_axis = 0; /* make compiler happy */
FT_TRACE4(( " [" ));
for ( n = 0; n < num_designs; n++ )
{
T1_TokenRec axis_tokens[T1_MAX_MM_AXIS];
T1_Token token;
FT_Int axis, n_axis;
/* read axis/coordinates tokens */
token = design_tokens + n;
parser->root.cursor = token->start;
parser->root.limit = token->limit;
T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &n_axis );
if ( n == 0 )
{
if ( n_axis <= 0 || n_axis > T1_MAX_MM_AXIS )
{
FT_ERROR(( "parse_blend_design_positions:"
" invalid number of axes: %d\n",
n_axis ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
num_axis = n_axis;
error = t1_allocate_blend( face,
(FT_UInt)num_designs,
(FT_UInt)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 = FT_THROW( Invalid_File_Format );
goto Exit;
}
/* now read each axis token into the design position */
FT_TRACE4(( " [" )) ;
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 );
FT_TRACE4(( " %f", (double)blend->design_pos[n][axis] / 65536 ));
}
FT_TRACE4(( "]" )) ;
}
FT_TRACE4(( "]\n" ));
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 = FT_Err_Ok;
T1_Parser parser = &loader->parser;
PS_Blend blend;
T1_TokenRec 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 )
{
error = FT_ERR( Ignore );
goto Exit;
}
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 = FT_THROW( Invalid_File_Format );
goto Exit;
}
old_cursor = parser->root.cursor;
old_limit = parser->root.limit;
error = t1_allocate_blend( face, 0, (FT_UInt)num_axis );
if ( error )
goto Exit;
blend = face->blend;
FT_TRACE4(( " [" ));
/* now read each axis design map */
for ( n = 0; n < num_axis; n++ )
{
PS_DesignMap map = blend->design_map + n;
T1_Token axis_token;
T1_TokenRec point_tokens[T1_MAX_MM_MAP_POINTS];
FT_Int p, num_points;
axis_token = axis_tokens + n;
parser->root.cursor = axis_token->start;
parser->root.limit = axis_token->limit;
T1_ToTokenArray( parser, point_tokens,
T1_MAX_MM_MAP_POINTS, &num_points );
FT_TRACE4(( " [" ));
if ( num_points <= 0 || num_points > T1_MAX_MM_MAP_POINTS )
{
FT_ERROR(( "parse_blend_design_map: incorrect table\n" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
if ( map->design_points )
{
FT_ERROR(( "parse_blend_design_map: duplicate table\n" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
/* allocate design map data */
if ( FT_NEW_ARRAY( map->design_points, num_points * 2 ) )
goto Exit;
map->blend_points = map->design_points + num_points;
map->num_points = (FT_Byte)num_points;
for ( p = 0; p < num_points; p++ )
{
T1_Token point_token;
point_token = point_tokens + p;
/* don't include delimiting brackets */
parser->root.cursor = point_token->start + 1;
parser->root.limit = point_token->limit - 1;
map->design_points[p] = T1_ToInt( parser );
map->blend_points [p] = T1_ToFixed( parser, 0 );
FT_TRACE4(( " [%ld %f]",
map->design_points[p],
(double)map->blend_points[p] / 65536 ));
}
FT_TRACE4(( "]" ));
}
FT_TRACE4(( "]\n" ));
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 )
{
T1_TokenRec design_tokens[T1_MAX_MM_DESIGNS];
FT_Int num_designs;
FT_Error error = FT_Err_Ok;
T1_Parser parser = &loader->parser;
PS_Blend blend = face->blend;
T1_Token token;
FT_Int n;
FT_Byte* old_cursor;
FT_Byte* old_limit;
T1_ToTokenArray( parser, design_tokens,
T1_MAX_MM_DESIGNS, &num_designs );
if ( num_designs < 0 )
{
error = FT_ERR( Ignore );
goto Exit;
}
if ( num_designs == 0 || num_designs > T1_MAX_MM_DESIGNS )
{
FT_ERROR(( "parse_weight_vector:"
" incorrect number of designs: %d\n",
num_designs ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
if ( !blend || !blend->num_designs )
{
error = t1_allocate_blend( face, (FT_UInt)num_designs, 0 );
if ( error )
goto Exit;
blend = face->blend;
}
else if ( blend->num_designs != (FT_UInt)num_designs )
{
FT_ERROR(( "parse_weight_vector:"
" /BlendDesignPosition and /WeightVector have\n" ));
FT_ERROR(( " "
" different number of elements\n" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
old_cursor = parser->root.cursor;
old_limit = parser->root.limit;
FT_TRACE4(( "[" ));
for ( n = 0; n < num_designs; n++ )
{
token = design_tokens + n;
parser->root.cursor = token->start;
parser->root.limit = token->limit;
blend->default_weight_vector[n] =
blend->weight_vector[n] = T1_ToFixed( parser, 0 );
FT_TRACE4(( " %f", (double)blend->weight_vector[n] / 65536 ));
}
FT_TRACE4(( "]\n" ));
parser->root.cursor = old_cursor;
parser->root.limit = old_limit;
Exit:
parser->root.error = error;
}
/* e.g., /BuildCharArray [0 0 0 0 0 0 0 0] def */
/* we're only interested in the number of array elements */
static void
parse_buildchar( T1_Face face,
T1_Loader loader )
{
face->len_buildchar = (FT_UInt)T1_ToFixedArray( &loader->parser,
0, NULL, 0 );
#ifdef FT_DEBUG_LEVEL_TRACE
{
FT_UInt i;
FT_TRACE4(( " [" ));
for ( i = 0; i < face->len_buildchar; i++ )
FT_TRACE4(( " 0" ));
FT_TRACE4(( "]\n" ));
}
#endif
return;
}
#endif /* !T1_CONFIG_OPTION_NO_MM_SUPPORT */
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** TYPE 1 SYMBOL PARSING *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
static FT_Error
t1_load_keyword( T1_Face face,
T1_Loader loader,
const T1_Field field )
{
FT_Error error;
void* dummy_object;
void** objects;
FT_UInt max_objects;
PS_Blend blend = face->blend;
if ( blend && blend->num_designs == 0 )
blend = NULL;
/* if the keyword has a dedicated callback, call it */
if ( field->type == T1_FIELD_TYPE_CALLBACK )
{
FT_TRACE4(( " %s", field->ident ));
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_LOCATION_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_LOCATION_FONT_EXTRA:
dummy_object = &face->type1.font_extra;
objects = &dummy_object;
max_objects = 0;
break;
case T1_FIELD_LOCATION_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;
case T1_FIELD_LOCATION_BBOX:
dummy_object = &face->type1.font_bbox;
objects = &dummy_object;
max_objects = 0;
if ( blend )
{
objects = (void**)blend->bboxes;
max_objects = blend->num_designs;
}
break;
case T1_FIELD_LOCATION_LOADER:
dummy_object = loader;
objects = &dummy_object;
max_objects = 0;
break;
case T1_FIELD_LOCATION_FACE:
dummy_object = face;
objects = &dummy_object;
max_objects = 0;
break;
#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
case T1_FIELD_LOCATION_BLEND:
dummy_object = face->blend;
objects = &dummy_object;
max_objects = 0;
break;
#endif
default:
dummy_object = &face->type1;
objects = &dummy_object;
max_objects = 0;
}
FT_TRACE4(( " %s", field->ident ));
if ( *objects )
{
if ( field->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
field->type == T1_FIELD_TYPE_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 );
}
else
{
FT_TRACE1(( "t1_load_keyword: ignoring keyword `%s'"
" which is not valid at this point\n",
field->ident ));
FT_TRACE1(( " (probably due to missing keywords)\n" ));
error = FT_Err_Ok;
}
FT_TRACE4(( "\n" ));
Exit:
return error;
}
static void
parse_private( T1_Face face,
T1_Loader loader )
{
FT_UNUSED( face );
loader->keywords_encountered |= T1_PRIVATE;
FT_TRACE4(( "\n" ));
}
/* return 1 in case of success */
static int
read_binary_data( T1_Parser parser,
FT_ULong* size,
FT_Byte** base,
FT_Bool incremental )
{
FT_Byte* cur;
FT_Byte* limit = parser->root.limit;
/* the binary data has one of the following formats */
/* */
/* `size' [white*] RD white ....... ND */
/* `size' [white*] -| white ....... |- */
/* */
T1_Skip_Spaces( parser );
cur = parser->root.cursor;
if ( cur < limit && ft_isdigit( *cur ) )
{
FT_Long s = T1_ToInt( parser );
T1_Skip_PS_Token( parser ); /* `RD' or `-|' or something else */
/* there is only one whitespace char after the */
/* `RD' or `-|' token */
*base = parser->root.cursor + 1;
if ( s >= 0 && s < limit - *base )
{
parser->root.cursor += s + 1;
*size = (FT_ULong)s;
return !parser->root.error;
}
}
if( !incremental )
{
FT_ERROR(( "read_binary_data: invalid size field\n" ));
parser->root.error = FT_THROW( Invalid_File_Format );
}
return 0;
}
/* We now define the routines to handle the `/Encoding', `/Subrs', */
/* and `/CharStrings' dictionaries. */
static void
t1_parse_font_matrix( T1_Face face,
T1_Loader loader )
{
T1_Parser 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;
FT_Int result;
/* input is scaled by 1000 to accommodate default FontMatrix */
result = T1_ToFixedArray( parser, 6, temp, 3 );
if ( result < 6 )
{
parser->root.error = FT_THROW( Invalid_File_Format );
return;
}
FT_TRACE4(( " [%f %f %f %f %f %f]\n",
(double)temp[0] / 65536 / 1000,
(double)temp[1] / 65536 / 1000,
(double)temp[2] / 65536 / 1000,
(double)temp[3] / 65536 / 1000,
(double)temp[4] / 65536 / 1000,
(double)temp[5] / 65536 / 1000 ));
temp_scale = FT_ABS( temp[3] );
if ( temp_scale == 0 )
{
FT_ERROR(( "t1_parse_font_matrix: invalid font matrix\n" ));
parser->root.error = FT_THROW( Invalid_File_Format );
return;
}
/* atypical case */
if ( temp_scale != 0x10000L )
{
/* set units per EM based on FontMatrix values */
root->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale );
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] = temp[3] < 0 ? -0x10000L : 0x10000L;
}
matrix->xx = temp[0];
matrix->yx = temp[1];
matrix->xy = temp[2];
matrix->yy = temp[3];
if ( !FT_Matrix_Check( matrix ) )
{
FT_ERROR(( "t1_parse_font_matrix: invalid font matrix\n" ));
parser->root.error = FT_THROW( Invalid_File_Format );
return;
}
/* 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_Parser parser = &loader->parser;
FT_Byte* cur;
FT_Byte* limit = parser->root.limit;
PSAux_Service psaux = (PSAux_Service)face->psaux;
T1_Skip_Spaces( parser );
cur = parser->root.cursor;
if ( cur >= limit )
{
FT_ERROR(( "parse_encoding: out of bounds\n" ));
parser->root.error = FT_THROW( Invalid_File_Format );
return;
}
/* if we have a number or `[', the encoding is an array, */
/* and we must load it now */
if ( ft_isdigit( *cur ) || *cur == '[' )
{
T1_Encoding encode = &face->type1.encoding;
FT_Int count, array_size, n;
PS_Table char_table = &loader->encoding_table;
FT_Memory memory = parser->root.memory;
FT_Error error;
FT_Bool only_immediates = 0;
/* read the number of entries in the encoding; should be 256 */
if ( *cur == '[' )
{
count = 256;
only_immediates = 1;
parser->root.cursor++;
}
else
count = (FT_Int)T1_ToInt( parser );
array_size = count;
if ( count > 256 )
{
FT_TRACE2(( "parse_encoding:"
" only using first 256 encoding array entries\n" ));
array_size = 256;
}
T1_Skip_Spaces( parser );
if ( parser->root.cursor >= limit )
return;
/* PostScript happily allows overwriting of encoding arrays */
if ( encode->char_index )
{
FT_FREE( encode->char_index );
FT_FREE( encode->char_name );
T1_Release_Table( char_table );
}
/* we use a T1_Table to store our charnames */
loader->num_chars = encode->num_chars = array_size;
if ( FT_NEW_ARRAY( encode->char_index, array_size ) ||
FT_NEW_ARRAY( encode->char_name, array_size ) ||
FT_SET_ERROR( psaux->ps_table_funcs->init(
char_table, array_size, memory ) ) )
{
parser->root.error = error;
return;
}
/* We need to `zero' out encoding_table.elements */
for ( n = 0; n < array_size; n++ )
(void)T1_Add_Table( char_table, n, ".notdef", 8 );
/* Now we need to read records 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. */
/* */
/* Alternatively, if the array is directly given as */
/* */
/* /Encoding [ ... ] */
/* */
/* we only read immediates. */
n = 0;
T1_Skip_Spaces( parser );
while ( parser->root.cursor < limit )
{
cur = parser->root.cursor;
/* we stop when we encounter a `def' or `]' */
if ( *cur == 'd' && cur + 3 < limit )
{
if ( cur[1] == 'e' &&
cur[2] == 'f' &&
IS_PS_DELIM( cur[3] ) )
{
FT_TRACE6(( "encoding end\n" ));
cur += 3;
break;
}
}
if ( *cur == ']' )
{
FT_TRACE6(( "encoding end\n" ));
cur++;
break;
}
/* check whether we've found an entry */
if ( ft_isdigit( *cur ) || only_immediates )
{
FT_Int charcode;
if ( only_immediates )
charcode = n;
else
{
charcode = (FT_Int)T1_ToInt( parser );
T1_Skip_Spaces( parser );
/* protect against invalid charcode */
if ( cur == parser->root.cursor )
{
parser->root.error = FT_THROW( Unknown_File_Format );
return;
}
}
cur = parser->root.cursor;
if ( cur + 2 < limit && *cur == '/' && n < count )
{
FT_UInt len;
cur++;
parser->root.cursor = cur;
T1_Skip_PS_Token( parser );
if ( parser->root.cursor >= limit )
return;
if ( parser->root.error )
return;
len = (FT_UInt)( parser->root.cursor - cur );
if ( n < array_size )
{
parser->root.error = T1_Add_Table( char_table, charcode,
cur, len + 1 );
if ( parser->root.error )
return;
char_table->elements[charcode][len] = '\0';
}
n++;
}
else if ( only_immediates )
{
/* Since the current position is not updated for */
/* immediates-only mode we would get an infinite loop if */
/* we don't do anything here. */
/* */
/* This encoding array is not valid according to the type1 */
/* specification (it might be an encoding for a CID type1 */
/* font, however), so we conclude that this font is NOT a */
/* type1 font. */
parser->root.error = FT_THROW( Unknown_File_Format );
return;
}
}
else
{
T1_Skip_PS_Token( parser );
if ( parser->root.error )
return;
}
T1_Skip_Spaces( parser );
}
#ifdef FT_DEBUG_LEVEL_TRACE
FT_TRACE4(( " [" ));
/* XXX show encoding vector */
FT_TRACE4(( "..." ));
FT_TRACE4(( "]\n" ));
#endif
face->type1.encoding_type = T1_ENCODING_TYPE_ARRAY;
parser->root.cursor = cur;
}
/* Otherwise, we should have either `StandardEncoding', */
/* `ExpertEncoding', or `ISOLatin1Encoding' */
else
{
if ( cur + 17 < limit &&
ft_strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
{
face->type1.encoding_type = T1_ENCODING_TYPE_STANDARD;
FT_TRACE4(( " StandardEncoding\n" ));
}
else if ( cur + 15 < limit &&
ft_strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
{
face->type1.encoding_type = T1_ENCODING_TYPE_EXPERT;
FT_TRACE4(( " ExpertEncoding\n" ));
}
else if ( cur + 18 < limit &&
ft_strncmp( (const char*)cur, "ISOLatin1Encoding", 17 ) == 0 )
{
face->type1.encoding_type = T1_ENCODING_TYPE_ISOLATIN1;
FT_TRACE4(( " ISOLatin1Encoding\n" ));
}
else
{
parser->root.error = FT_ERR( Ignore );
FT_TRACE4(( "<unknown>\n" ));
}
}
}
static void
parse_subrs( T1_Face face,
T1_Loader loader )
{
T1_Parser parser = &loader->parser;
PS_Table table = &loader->subrs;
FT_Memory memory = parser->root.memory;
FT_Error error;
FT_Int num_subrs;
FT_UInt count;
PSAux_Service psaux = (PSAux_Service)face->psaux;
T1_Skip_Spaces( parser );
/* test for empty array */
if ( parser->root.cursor < parser->root.limit &&
*parser->root.cursor == '[' )
{
T1_Skip_PS_Token( parser );
T1_Skip_Spaces ( parser );
if ( parser->root.cursor >= parser->root.limit ||
*parser->root.cursor != ']' )
parser->root.error = FT_THROW( Invalid_File_Format );
return;
}
num_subrs = (FT_Int)T1_ToInt( parser );
if ( num_subrs < 0 )
{
parser->root.error = FT_THROW( Invalid_File_Format );
return;
}
/* we certainly need more than 8 bytes per subroutine */
if ( parser->root.limit >= parser->root.cursor &&
num_subrs > ( parser->root.limit - parser->root.cursor ) >> 3 )
{
/*
* There are two possibilities. Either the font contains an invalid
* value for `num_subrs', or we have a subsetted font where the
* subroutine indices are not adjusted, e.g.
*
* /Subrs 812 array
* dup 0 { ... } NP
* dup 51 { ... } NP
* dup 681 { ... } NP
* ND
*
* In both cases, we use a number hash that maps from subr indices to
* actual array elements.
*/
FT_TRACE0(( "parse_subrs: adjusting number of subroutines"
" (from %d to %ld)\n",
num_subrs,
( parser->root.limit - parser->root.cursor ) >> 3 ));
num_subrs = ( parser->root.limit - parser->root.cursor ) >> 3;
if ( !loader->subrs_hash )
{
if ( FT_NEW( loader->subrs_hash ) )
goto Fail;
error = ft_hash_num_init( loader->subrs_hash, memory );
if ( error )
goto Fail;
}
}
/* position the parser right before the `dup' of the first subr */
T1_Skip_PS_Token( parser ); /* `array' */
if ( parser->root.error )
return;
T1_Skip_Spaces( parser );
/* initialize subrs array -- with synthetic fonts it is possible */
/* we get here twice */
if ( !loader->num_subrs )
{
error = psaux->ps_table_funcs->init( table, num_subrs, memory );
if ( error )
goto Fail;
}
/* the format is simple: */
/* */
/* `index' + binary data */
/* */
for ( count = 0; ; count++ )
{
FT_Long idx;
FT_ULong size;
FT_Byte* base;
/* If we are out of data, or if the next token isn't `dup', */
/* we are done. */
if ( parser->root.cursor + 4 >= parser->root.limit ||
ft_strncmp( (char*)parser->root.cursor, "dup", 3 ) != 0 )
break;
T1_Skip_PS_Token( parser ); /* `dup' */
idx = T1_ToInt( parser );
if ( !read_binary_data( parser, &size, &base, IS_INCREMENTAL ) )
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_PS_Token( parser ); /* `NP' or `|' or `noaccess' */
if ( parser->root.error )
return;
T1_Skip_Spaces ( parser );
if ( parser->root.cursor + 4 < parser->root.limit &&
ft_strncmp( (char*)parser->root.cursor, "put", 3 ) == 0 )
{
T1_Skip_PS_Token( parser ); /* skip `put' */
T1_Skip_Spaces ( parser );
}
/* if we use a hash, the subrs index is the key, and a running */
/* counter specified for `T1_Add_Table' acts as the value */
if ( loader->subrs_hash )
{
ft_hash_num_insert( idx, count, loader->subrs_hash, memory );
idx = count;
}
/* with synthetic fonts it is possible we get here twice */
if ( loader->num_subrs )
continue;
/* 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 )
{
FT_Byte* temp = NULL;
/* some fonts define empty subr records -- this is not totally */
/* compliant to the specification (which says they should at */
/* least contain a `return'), but we support them anyway */
if ( size < (FT_ULong)face->type1.private_dict.lenIV )
{
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
/* t1_decrypt() shouldn't write to base -- make temporary copy */
if ( FT_ALLOC( temp, size ) )
goto Fail;
FT_MEM_COPY( temp, base, size );
psaux->t1_decrypt( temp, size, 4330 );
size -= (FT_ULong)face->type1.private_dict.lenIV;
error = T1_Add_Table( table, (FT_Int)idx,
temp + face->type1.private_dict.lenIV, size );
FT_FREE( temp );
}
else
error = T1_Add_Table( table, (FT_Int)idx, base, size );
if ( error )
goto Fail;
}
if ( !loader->num_subrs )
loader->num_subrs = num_subrs;
#ifdef FT_DEBUG_LEVEL_TRACE
FT_TRACE4(( " <" ));
/* XXX show subrs? */
FT_TRACE4(( "%d elements", num_subrs ));
FT_TRACE4(( ">\n" ));
#endif
return;
Fail:
parser->root.error = error;
}
#define TABLE_EXTEND 5
static void
parse_charstrings( T1_Face face,
T1_Loader loader )
{
T1_Parser 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_Service psaux = (PSAux_Service)face->psaux;
FT_Byte* cur = parser->root.cursor;
FT_Byte* limit = parser->root.limit;
FT_Int n, num_glyphs;
FT_Int notdef_index = 0;
FT_Byte notdef_found = 0;
num_glyphs = (FT_Int)T1_ToInt( parser );
if ( num_glyphs < 0 )
{
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
/* we certainly need more than 8 bytes per glyph */
if ( num_glyphs > ( limit - cur ) >> 3 )
{
FT_TRACE0(( "parse_charstrings: adjusting number of glyphs"
" (from %d to %ld)\n",
num_glyphs, ( limit - cur ) >> 3 ));
num_glyphs = ( limit - cur ) >> 3;
}
/* some fonts like Optima-Oblique not only define the /CharStrings */
/* array but access it also */
if ( num_glyphs == 0 || parser->root.error )
return;
/* initialize tables, leaving space for addition of .notdef, */
/* if necessary, and a few other glyphs to handle buggy */
/* fonts which have more glyphs than specified. */
/* for some non-standard fonts like `Optima' which provides */
/* different outlines depending on the resolution it is */
/* possible to get here twice */
if ( !loader->num_glyphs )
{
error = psaux->ps_table_funcs->init(
code_table, num_glyphs + 1 + TABLE_EXTEND, memory );
if ( error )
goto Fail;
error = psaux->ps_table_funcs->init(
name_table, num_glyphs + 1 + TABLE_EXTEND, 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_ULong size;
FT_Byte* base;
/* the format is simple: */
/* `/glyphname' + binary data */
T1_Skip_Spaces( parser );
cur = parser->root.cursor;
if ( cur >= limit )
break;
/* we stop when we find a `def' or `end' keyword */
if ( cur + 3 < limit && IS_PS_DELIM( cur[3] ) )
{
if ( cur[0] == 'd' &&
cur[1] == 'e' &&
cur[2] == 'f' )
{
/* There are fonts which have this: */
/* */
/* /CharStrings 118 dict def */
/* Private begin */
/* CharStrings begin */
/* ... */
/* */
/* To catch this we ignore `def' if */
/* no charstring has actually been */
/* seen. */
if ( n )
break;
}
if ( cur[0] == 'e' &&
cur[1] == 'n' &&
cur[2] == 'd' )
break;
}
T1_Skip_PS_Token( parser );
if ( parser->root.cursor >= limit )
{
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
if ( parser->root.error )
return;
if ( *cur == '/' )
{
FT_UInt len;
if ( cur + 2 >= limit )
{
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
cur++; /* skip `/' */
len = (FT_UInt)( parser->root.cursor - cur );
if ( !read_binary_data( parser, &size, &base, IS_INCREMENTAL ) )
return;
/* for some non-standard fonts like `Optima' which provides */
/* different outlines depending on the resolution it is */
/* possible to get here twice */
if ( loader->num_glyphs )
continue;
error = T1_Add_Table( name_table, n, cur, 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 ( *cur == '.' &&
ft_strcmp( ".notdef",
(const char*)(name_table->elements[n]) ) == 0 )
{
notdef_index = n;
notdef_found = 1;
}
if ( face->type1.private_dict.lenIV >= 0 &&
n < num_glyphs + TABLE_EXTEND )
{
FT_Byte* temp = NULL;
if ( size <= (FT_ULong)face->type1.private_dict.lenIV )
{
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
/* t1_decrypt() shouldn't write to base -- make temporary copy */
if ( FT_ALLOC( temp, size ) )
goto Fail;
FT_MEM_COPY( temp, base, size );
psaux->t1_decrypt( temp, size, 4330 );
size -= (FT_ULong)face->type1.private_dict.lenIV;
error = T1_Add_Table( code_table, n,
temp + face->type1.private_dict.lenIV, size );
FT_FREE( temp );
}
else
error = T1_Add_Table( code_table, n, base, size );
if ( error )
goto Fail;
n++;
}
}
if ( !n )
{
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
loader->num_glyphs = n;
/* if /.notdef is found but does not occupy index 0, do our magic. */
if ( notdef_found &&
ft_strcmp( ".notdef", (const char*)name_table->elements[0] ) )
{
/* 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 };
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", 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 += 1;
}
#ifdef FT_DEBUG_LEVEL_TRACE
FT_TRACE4(( " <" ));
/* XXX show charstrings? */
FT_TRACE4(( "%d elements", loader->num_glyphs ));
FT_TRACE4(( ">\n" ));
#endif
return;
Fail:
parser->root.error = error;
}
/**************************************************************************
*
* Define the token field static variables. This is a set of
* T1_FieldRec variables.
*
*/
static
const T1_FieldRec t1_keywords[] =
{
#include "t1tokens.h"
/* now add the special functions... */
T1_FIELD_CALLBACK( "FontMatrix", t1_parse_font_matrix,
T1_FIELD_DICT_FONTDICT )
T1_FIELD_CALLBACK( "Encoding", parse_encoding,
T1_FIELD_DICT_FONTDICT )
T1_FIELD_CALLBACK( "Subrs", parse_subrs,
T1_FIELD_DICT_PRIVATE )
T1_FIELD_CALLBACK( "CharStrings", parse_charstrings,
T1_FIELD_DICT_PRIVATE )
T1_FIELD_CALLBACK( "Private", parse_private,
T1_FIELD_DICT_FONTDICT )
#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
T1_FIELD_CALLBACK( "BlendDesignPositions", parse_blend_design_positions,
T1_FIELD_DICT_FONTDICT )
T1_FIELD_CALLBACK( "BlendDesignMap", parse_blend_design_map,
T1_FIELD_DICT_FONTDICT )
T1_FIELD_CALLBACK( "BlendAxisTypes", parse_blend_axis_types,
T1_FIELD_DICT_FONTDICT )
T1_FIELD_CALLBACK( "WeightVector", parse_weight_vector,
T1_FIELD_DICT_FONTDICT )
T1_FIELD_CALLBACK( "BuildCharArray", parse_buildchar,
T1_FIELD_DICT_PRIVATE )
#endif
{ 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 }
};
static FT_Error
parse_dict( T1_Face face,
T1_Loader loader,
FT_Byte* base,
FT_ULong size )
{
T1_Parser parser = &loader->parser;
FT_Byte *limit, *start_binary = NULL;
FT_Bool have_integer = 0;
parser->root.cursor = base;
parser->root.limit = base + size;
parser->root.error = FT_Err_Ok;
limit = parser->root.limit;
T1_Skip_Spaces( parser );
while ( parser->root.cursor < limit )
{
FT_Byte* cur;
cur = parser->root.cursor;
/* look for `eexec' */
if ( IS_PS_TOKEN( cur, limit, "eexec" ) )
break;
/* look for `closefile' which ends the eexec section */
else if ( IS_PS_TOKEN( cur, limit, "closefile" ) )
break;
/* in a synthetic font the base font starts after a */
/* `FontDictionary' token that is placed after a Private dict */
else if ( IS_PS_TOKEN( cur, limit, "FontDirectory" ) )
{
if ( loader->keywords_encountered & T1_PRIVATE )
loader->keywords_encountered |=
T1_FONTDIR_AFTER_PRIVATE;
parser->root.cursor += 13;
}
/* check whether we have an integer */
else if ( ft_isdigit( *cur ) )
{
start_binary = cur;
T1_Skip_PS_Token( parser );
if ( parser->root.error )
goto Exit;
have_integer = 1;
}
/* in valid Type 1 fonts we don't see `RD' or `-|' directly */
/* since those tokens are handled by parse_subrs and */
/* parse_charstrings */
else if ( *cur == 'R' && cur + 6 < limit && *(cur + 1) == 'D' &&
have_integer )
{
FT_ULong s;
FT_Byte* b;
parser->root.cursor = start_binary;
if ( !read_binary_data( parser, &s, &b, IS_INCREMENTAL ) )
return FT_THROW( Invalid_File_Format );
have_integer = 0;
}
else if ( *cur == '-' && cur + 6 < limit && *(cur + 1) == '|' &&
have_integer )
{
FT_ULong s;
FT_Byte* b;
parser->root.cursor = start_binary;
if ( !read_binary_data( parser, &s, &b, IS_INCREMENTAL ) )
return FT_THROW( Invalid_File_Format );
have_integer = 0;
}
/* look for immediates */
else if ( *cur == '/' && cur + 2 < limit )
{
FT_UInt len;
cur++;
parser->root.cursor = cur;
T1_Skip_PS_Token( parser );
if ( parser->root.error )
goto Exit;
len = (FT_UInt)( parser->root.cursor - cur );
if ( len > 0 && len < 22 && parser->root.cursor < limit )
{
/* 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_strlen( (const char *)name ) &&
ft_memcmp( cur, name, len ) == 0 )
{
/* We found it -- run the parsing callback! */
/* We record every instance of every field */
/* (until we reach the base font of a */
/* synthetic font) to deal adequately with */
/* multiple master fonts; this is also */
/* necessary because later PostScript */
/* definitions override earlier ones. */
/* Once we encounter `FontDirectory' after */
/* `/Private', we know that this is a synthetic */
/* font; except for `/CharStrings' we are not */
/* interested in anything that follows this */
/* `FontDirectory'. */
/* MM fonts have more than one /Private token at */
/* the top level; let's hope that all the junk */
/* that follows the first /Private token is not */
/* interesting to us. */
/* According to Adobe Tech Note #5175 (CID-Keyed */
/* Font Installation for ATM Software) a `begin' */
/* must be followed by exactly one `end', and */
/* `begin' -- `end' pairs must be accurately */
/* paired. We could use this to distinguish */
/* between the global Private and the Private */
/* dict that is a member of the Blend dict. */
const FT_UInt dict =
( loader->keywords_encountered & T1_PRIVATE )
? T1_FIELD_DICT_PRIVATE
: T1_FIELD_DICT_FONTDICT;
if ( !( dict & keyword->dict ) )
{
FT_TRACE1(( "parse_dict: found `%s' but ignoring it"
" since it is in the wrong dictionary\n",
keyword->ident ));
break;
}
if ( !( loader->keywords_encountered &
T1_FONTDIR_AFTER_PRIVATE ) ||
ft_strcmp( (const char*)name, "CharStrings" ) == 0 )
{
parser->root.error = t1_load_keyword( face,
loader,
keyword );
if ( parser->root.error )
{
if ( FT_ERR_EQ( parser->root.error, Ignore ) )
parser->root.error = FT_Err_Ok;
else
return parser->root.error;
}
}
break;
}
keyword++;
}
}
have_integer = 0;
}
else
{
T1_Skip_PS_Token( parser );
if ( parser->root.error )
goto Exit;
have_integer = 0;
}
T1_Skip_Spaces( parser );
}
Exit:
return parser->root.error;
}
static void
t1_init_loader( T1_Loader loader,
T1_Face face )
{
FT_UNUSED( face );
FT_ZERO( loader );
}
static void
t1_done_loader( T1_Loader loader )
{
T1_Parser parser = &loader->parser;
FT_Memory memory = parser->root.memory;
/* 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 hash */
ft_hash_num_free( loader->subrs_hash, memory );
FT_FREE( loader->subrs_hash );
/* finalize parser */
T1_Finalize_Parser( parser );
}
FT_LOCAL_DEF( FT_Error )
T1_Open_Face( T1_Face face )
{
T1_LoaderRec loader;
T1_Parser parser;
T1_Font type1 = &face->type1;
PS_Private priv = &type1->private_dict;
FT_Error error;
PSAux_Service psaux = (PSAux_Service)face->psaux;
t1_init_loader( &loader, face );
/* default values */
face->ndv_idx = -1;
face->cdv_idx = -1;
face->len_buildchar = 0;
priv->blue_shift = 7;
priv->blue_fuzz = 1;
priv->lenIV = 4;
priv->expansion_factor = (FT_Fixed)( 0.06 * 0x10000L );
priv->blue_scale = (FT_Fixed)( 0.039625 * 0x10000L * 1000 );
parser = &loader.parser;
error = T1_New_Parser( parser,
face->root.stream,
face->root.memory,
psaux );
if ( error )
goto Exit;
FT_TRACE4(( " top dictionary:\n" ));
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;
FT_TRACE4(( " private dictionary:\n" ));
error = parse_dict( face, &loader,
parser->private_dict, parser->private_len );
if ( error )
goto Exit;
/* ensure even-ness of `num_blue_values' */
priv->num_blue_values &= ~1;
#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
/* we don't support Multiple Master fonts with intermediate designs; */
/* this implies that `num_designs' must be equal to `2^^num_axis' */
if ( face->blend &&
face->blend->num_designs != ( 1U << face->blend->num_axis ) )
{
FT_ERROR(( "T1_Open_Face:"
" number-of-designs != 2 ^^ number-of-axes\n" ));
T1_Done_Blend( face );
}
if ( face->blend &&
face->blend->num_default_design_vector != 0 &&
face->blend->num_default_design_vector != face->blend->num_axis )
{
/* we don't use it currently so just warn, reset, and ignore */
FT_ERROR(( "T1_Open_Face(): /DesignVector contains %u entries "
"while there are %u axes.\n",
face->blend->num_default_design_vector,
face->blend->num_axis ));
face->blend->num_default_design_vector = 0;
}
/* the following can happen for MM instances; we then treat the */
/* font as a normal PS font */
if ( face->blend &&
( !face->blend->num_designs || !face->blend->num_axis ) )
T1_Done_Blend( face );
/* another safety check */
if ( face->blend )
{
FT_UInt i;
for ( i = 0; i < face->blend->num_axis; i++ )
if ( !face->blend->design_map[i].num_points )
{
T1_Done_Blend( face );
break;
}
}
if ( face->blend )
{
if ( face->len_buildchar > 0 )
{
FT_Memory memory = face->root.memory;
if ( FT_NEW_ARRAY( face->buildchar, face->len_buildchar ) )
{
FT_ERROR(( "T1_Open_Face: cannot allocate BuildCharArray\n" ));
face->len_buildchar = 0;
goto Exit;
}
}
}
else
face->len_buildchar = 0;
#endif /* !T1_CONFIG_OPTION_NO_MM_SUPPORT */
/* now, propagate the subrs, charstrings, and glyphnames tables */
/* to the Type1 data */
type1->num_glyphs = loader.num_glyphs;
if ( loader.subrs.init )
{
type1->num_subrs = loader.num_subrs;
type1->subrs_block = loader.subrs.block;
type1->subrs = loader.subrs.elements;
type1->subrs_len = loader.subrs.lengths;
type1->subrs_hash = loader.subrs_hash;
/* prevent `t1_done_loader' from freeing the propagated data */
loader.subrs.init = 0;
loader.subrs_hash = NULL;
}
if ( !IS_INCREMENTAL )
if ( !loader.charstrings.init )
{
FT_ERROR(( "T1_Open_Face: no `/CharStrings' array in face\n" ));
error = FT_THROW( 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 = NULL;
loader.glyph_names.elements = NULL;
/* we must now build type1.encoding when we have a custom array */
if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY )
{
FT_Int charcode, idx, min_char, max_char;
/* 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 */
/* the name to type1.encoding.char_name */
min_char = 0;
max_char = 0;
charcode = 0;
for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
{
const FT_String* char_name =
(const FT_String*)loader.encoding_table.elements[charcode];
type1->encoding.char_index[charcode] = 0;
type1->encoding.char_name [charcode] = ".notdef";
if ( char_name )
for ( idx = 0; idx < type1->num_glyphs; idx++ )
{
const FT_String* glyph_name = type1->glyph_names[idx];
if ( ft_strcmp( char_name, glyph_name ) == 0 )
{
type1->encoding.char_index[charcode] = (FT_UShort)idx;
type1->encoding.char_name [charcode] = glyph_name;
/* Change min/max encoded char only if glyph name is */
/* not /.notdef */
if ( ft_strcmp( ".notdef", glyph_name ) != 0 )
{
if ( charcode < min_char )
min_char = charcode;
if ( charcode >= max_char )
max_char = charcode + 1;
}
break;
}
}
}
type1->encoding.code_first = min_char;
type1->encoding.code_last = max_char;
type1->encoding.num_chars = loader.num_chars;
}
/* some sanitizing to avoid overflows later on; */
/* the upper limits are ad-hoc values */
if ( priv->blue_shift > 1000 || priv->blue_shift < 0 )
{
FT_TRACE2(( "T1_Open_Face:"
" setting unlikely BlueShift value %d to default (7)\n",
priv->blue_shift ));
priv->blue_shift = 7;
}
if ( priv->blue_fuzz > 1000 || priv->blue_fuzz < 0 )
{
FT_TRACE2(( "T1_Open_Face:"
" setting unlikely BlueFuzz value %d to default (1)\n",
priv->blue_fuzz ));
priv->blue_fuzz = 1;
}
Exit:
t1_done_loader( &loader );
return error;
}
/* END */