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flutter / third_party / freetype2 / c6dd509b99447e8d83bd317a76f7d9377ddc126a / . / src / psaux / psobjs.c
blob: 212a657f14299e6bd142d99e4a128822769b9049 [file] [log] [blame]
/****************************************************************************
*
* psobjs.c
*
* Auxiliary functions for PostScript fonts (body).
*
* Copyright (C) 1996-2022 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/
#include <freetype/internal/psaux.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftcalc.h>
#include <freetype/ftdriver.h>
#include "psobjs.h"
#include "psconv.h"
#include "psauxerr.h"
#include "psauxmod.h"
/**************************************************************************
*
* 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 psobjs
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** PS_TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* @Function:
* ps_table_new
*
* @Description:
* Initializes a PS_Table.
*
* @InOut:
* table ::
* The address of the target table.
*
* @Input:
* count ::
* The table size = the maximum number of elements.
*
* memory ::
* The memory object to use for all subsequent
* reallocations.
*
* @Return:
* FreeType error code. 0 means success.
*/
FT_LOCAL_DEF( FT_Error )
ps_table_new( PS_Table table,
FT_Int count,
FT_Memory memory )
{
FT_Error error;
table->memory = memory;
if ( FT_NEW_ARRAY( table->elements, count ) ||
FT_NEW_ARRAY( table->lengths, count ) )
goto Exit;
table->max_elems = count;
table->init = 0xDEADBEEFUL;
table->num_elems = 0;
table->block = NULL;
table->capacity = 0;
table->cursor = 0;
*(PS_Table_FuncsRec*)&table->funcs = ps_table_funcs;
Exit:
if ( error )
FT_FREE( table->elements );
return error;
}
static void
shift_elements( PS_Table table,
FT_Byte* old_base )
{
FT_PtrDist delta = table->block - old_base;
FT_Byte** offset = table->elements;
FT_Byte** limit = offset + table->max_elems;
for ( ; offset < limit; offset++ )
{
if ( offset[0] )
offset[0] += delta;
}
}
static FT_Error
reallocate_t1_table( PS_Table table,
FT_Offset new_size )
{
FT_Memory memory = table->memory;
FT_Byte* old_base = table->block;
FT_Error error;
/* allocate new base block */
if ( FT_ALLOC( table->block, new_size ) )
{
table->block = old_base;
return error;
}
/* copy elements and shift offsets */
if ( old_base )
{
FT_MEM_COPY( table->block, old_base, table->capacity );
shift_elements( table, old_base );
FT_FREE( old_base );
}
table->capacity = new_size;
return FT_Err_Ok;
}
/**************************************************************************
*
* @Function:
* ps_table_add
*
* @Description:
* Adds an object to a PS_Table, possibly growing its memory block.
*
* @InOut:
* table ::
* The target table.
*
* @Input:
* idx ::
* The index of the object in the table.
*
* object ::
* The address of the object to copy in memory.
*
* length ::
* The length in bytes of the source object.
*
* @Return:
* FreeType error code. 0 means success. An error is returned if a
* reallocation fails.
*/
FT_LOCAL_DEF( FT_Error )
ps_table_add( PS_Table table,
FT_Int idx,
const void* object,
FT_UInt length )
{
if ( idx < 0 || idx >= table->max_elems )
{
FT_ERROR(( "ps_table_add: invalid index\n" ));
return FT_THROW( Invalid_Argument );
}
/* grow the base block if needed */
if ( table->cursor + length > table->capacity )
{
FT_Error error;
FT_Offset new_size = table->capacity;
FT_PtrDist in_offset;
in_offset = (FT_Byte*)object - table->block;
if ( in_offset < 0 || (FT_Offset)in_offset >= table->capacity )
in_offset = -1;
while ( new_size < table->cursor + length )
{
/* increase size by 25% and round up to the nearest multiple
of 1024 */
new_size += ( new_size >> 2 ) + 1;
new_size = FT_PAD_CEIL( new_size, 1024 );
}
error = reallocate_t1_table( table, new_size );
if ( error )
return error;
if ( in_offset >= 0 )
object = table->block + in_offset;
}
/* add the object to the base block and adjust offset */
table->elements[idx] = FT_OFFSET( table->block, table->cursor );
table->lengths [idx] = length;
FT_MEM_COPY( table->block + table->cursor, object, length );
table->cursor += length;
return FT_Err_Ok;
}
/**************************************************************************
*
* @Function:
* ps_table_done
*
* @Description:
* Finalizes a PS_TableRec (i.e., reallocate it to its current
* cursor).
*
* @InOut:
* table ::
* The target table.
*
* @Note:
* This function does NOT release the heap's memory block. It is up
* to the caller to clean it, or reference it in its own structures.
*/
FT_LOCAL_DEF( void )
ps_table_done( PS_Table table )
{
FT_Memory memory = table->memory;
FT_Error error;
FT_Byte* old_base = table->block;
/* should never fail, because rec.cursor <= rec.size */
if ( !old_base )
return;
if ( FT_QALLOC( table->block, table->cursor ) )
return;
FT_MEM_COPY( table->block, old_base, table->cursor );
shift_elements( table, old_base );
table->capacity = table->cursor;
FT_FREE( old_base );
}
FT_LOCAL_DEF( void )
ps_table_release( PS_Table table )
{
FT_Memory memory = table->memory;
if ( (FT_ULong)table->init == 0xDEADBEEFUL )
{
FT_FREE( table->block );
FT_FREE( table->elements );
FT_FREE( table->lengths );
table->init = 0;
}
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** T1 PARSER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/* first character must be already part of the comment */
static void
skip_comment( FT_Byte* *acur,
FT_Byte* limit )
{
FT_Byte* cur = *acur;
while ( cur < limit )
{
if ( IS_PS_NEWLINE( *cur ) )
break;
cur++;
}
*acur = cur;
}
static void
skip_spaces( FT_Byte* *acur,
FT_Byte* limit )
{
FT_Byte* cur = *acur;
while ( cur < limit )
{
if ( !IS_PS_SPACE( *cur ) )
{
if ( *cur == '%' )
/* According to the PLRM, a comment is equal to a space. */
skip_comment( &cur, limit );
else
break;
}
cur++;
}
*acur = cur;
}
#define IS_OCTAL_DIGIT( c ) ( '0' <= (c) && (c) <= '7' )
/* first character must be `('; */
/* *acur is positioned at the character after the closing `)' */
static FT_Error
skip_literal_string( FT_Byte* *acur,
FT_Byte* limit )
{
FT_Byte* cur = *acur;
FT_Int embed = 0;
FT_Error error = FT_ERR( Invalid_File_Format );
unsigned int i;
while ( cur < limit )
{
FT_Byte c = *cur;
cur++;
if ( c == '\\' )
{
/* Red Book 3rd ed., section `Literal Text Strings', p. 29: */
/* A backslash can introduce three different types */
/* of escape sequences: */
/* - a special escaped char like \r, \n, etc. */
/* - a one-, two-, or three-digit octal number */
/* - none of the above in which case the backslash is ignored */
if ( cur == limit )
/* error (or to be ignored?) */
break;
switch ( *cur )
{
/* skip `special' escape */
case 'n':
case 'r':
case 't':
case 'b':
case 'f':
case '\\':
case '(':
case ')':
cur++;
break;
default:
/* skip octal escape or ignore backslash */
for ( i = 0; i < 3 && cur < limit; i++ )
{
if ( !IS_OCTAL_DIGIT( *cur ) )
break;
cur++;
}
}
}
else if ( c == '(' )
embed++;
else if ( c == ')' )
{
embed--;
if ( embed == 0 )
{
error = FT_Err_Ok;
break;
}
}
}
*acur = cur;
return error;
}
/* first character must be `<' */
static FT_Error
skip_string( FT_Byte* *acur,
FT_Byte* limit )
{
FT_Byte* cur = *acur;
FT_Error err = FT_Err_Ok;
while ( ++cur < limit )
{
/* All whitespace characters are ignored. */
skip_spaces( &cur, limit );
if ( cur >= limit )
break;
if ( !IS_PS_XDIGIT( *cur ) )
break;
}
if ( cur < limit && *cur != '>' )
{
FT_ERROR(( "skip_string: missing closing delimiter `>'\n" ));
err = FT_THROW( Invalid_File_Format );
}
else
cur++;
*acur = cur;
return err;
}
/* first character must be the opening brace that */
/* starts the procedure */
/* NB: [ and ] need not match: */
/* `/foo {[} def' is a valid PostScript fragment, */
/* even within a Type1 font */
static FT_Error
skip_procedure( FT_Byte* *acur,
FT_Byte* limit )
{
FT_Byte* cur;
FT_Int embed = 0;
FT_Error error = FT_Err_Ok;
FT_ASSERT( **acur == '{' );
for ( cur = *acur; cur < limit && error == FT_Err_Ok; cur++ )
{
switch ( *cur )
{
case '{':
embed++;
break;
case '}':
embed--;
if ( embed == 0 )
{
cur++;
goto end;
}
break;
case '(':
error = skip_literal_string( &cur, limit );
break;
case '<':
error = skip_string( &cur, limit );
break;
case '%':
skip_comment( &cur, limit );
break;
}
}
end:
if ( embed != 0 )
error = FT_THROW( Invalid_File_Format );
*acur = cur;
return error;
}
/************************************************************************
*
* All exported parsing routines handle leading whitespace and stop at
* the first character which isn't part of the just handled token.
*
*/
FT_LOCAL_DEF( void )
ps_parser_skip_PS_token( PS_Parser parser )
{
/* Note: PostScript allows any non-delimiting, non-whitespace */
/* character in a name (PS Ref Manual, 3rd ed, p31). */
/* PostScript delimiters are (, ), <, >, [, ], {, }, /, and %. */
FT_Byte* cur = parser->cursor;
FT_Byte* limit = parser->limit;
FT_Error error = FT_Err_Ok;
skip_spaces( &cur, limit ); /* this also skips comments */
if ( cur >= limit )
goto Exit;
/* self-delimiting, single-character tokens */
if ( *cur == '[' || *cur == ']' )
{
cur++;
goto Exit;
}
/* skip balanced expressions (procedures and strings) */
if ( *cur == '{' ) /* {...} */
{
error = skip_procedure( &cur, limit );
goto Exit;
}
if ( *cur == '(' ) /* (...) */
{
error = skip_literal_string( &cur, limit );
goto Exit;
}
if ( *cur == '<' ) /* <...> */
{
if ( cur + 1 < limit && *(cur + 1) == '<' ) /* << */
{
cur++;
cur++;
}
else
error = skip_string( &cur, limit );
goto Exit;
}
if ( *cur == '>' )
{
cur++;
if ( cur >= limit || *cur != '>' ) /* >> */
{
FT_ERROR(( "ps_parser_skip_PS_token:"
" unexpected closing delimiter `>'\n" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
cur++;
goto Exit;
}
if ( *cur == '/' )
cur++;
/* anything else */
while ( cur < limit )
{
/* *cur might be invalid (e.g., ')' or '}'), but this */
/* is handled by the test `cur == parser->cursor' below */
if ( IS_PS_DELIM( *cur ) )
break;
cur++;
}
Exit:
if ( cur < limit && cur == parser->cursor )
{
FT_ERROR(( "ps_parser_skip_PS_token:"
" current token is `%c' which is self-delimiting\n",
*cur ));
FT_ERROR(( " "
" but invalid at this point\n" ));
error = FT_THROW( Invalid_File_Format );
}
if ( cur > limit )
cur = limit;
parser->error = error;
parser->cursor = cur;
}
FT_LOCAL_DEF( void )
ps_parser_skip_spaces( PS_Parser parser )
{
skip_spaces( &parser->cursor, parser->limit );
}
/* `token' here means either something between balanced delimiters */
/* or the next token; the delimiters are not removed. */
FT_LOCAL_DEF( void )
ps_parser_to_token( PS_Parser parser,
T1_Token token )
{
FT_Byte* cur;
FT_Byte* limit;
FT_Int embed;
token->type = T1_TOKEN_TYPE_NONE;
token->start = NULL;
token->limit = NULL;
/* first of all, skip leading whitespace */
ps_parser_skip_spaces( parser );
cur = parser->cursor;
limit = parser->limit;
if ( cur >= limit )
return;
switch ( *cur )
{
/************* check for literal string *****************/
case '(':
token->type = T1_TOKEN_TYPE_STRING;
token->start = cur;
if ( skip_literal_string( &cur, limit ) == FT_Err_Ok )
token->limit = cur;
break;
/************* check for programs/array *****************/
case '{':
token->type = T1_TOKEN_TYPE_ARRAY;
token->start = cur;
if ( skip_procedure( &cur, limit ) == FT_Err_Ok )
token->limit = cur;
break;
/************* check for table/array ********************/
/* XXX: in theory we should also look for "<<" */
/* since this is semantically equivalent to "["; */
/* in practice it doesn't matter (?) */
case '[':
token->type = T1_TOKEN_TYPE_ARRAY;
embed = 1;
token->start = cur++;
/* we need this to catch `[ ]' */
parser->cursor = cur;
ps_parser_skip_spaces( parser );
cur = parser->cursor;
while ( cur < limit && !parser->error )
{
/* XXX: this is wrong because it does not */
/* skip comments, procedures, and strings */
if ( *cur == '[' )
embed++;
else if ( *cur == ']' )
{
embed--;
if ( embed <= 0 )
{
token->limit = ++cur;
break;
}
}
parser->cursor = cur;
ps_parser_skip_PS_token( parser );
/* we need this to catch `[XXX ]' */
ps_parser_skip_spaces ( parser );
cur = parser->cursor;
}
break;
/* ************ otherwise, it is any token **************/
default:
token->start = cur;
token->type = ( *cur == '/' ) ? T1_TOKEN_TYPE_KEY : T1_TOKEN_TYPE_ANY;
ps_parser_skip_PS_token( parser );
cur = parser->cursor;
if ( !parser->error )
token->limit = cur;
}
if ( !token->limit )
{
token->start = NULL;
token->type = T1_TOKEN_TYPE_NONE;
}
parser->cursor = cur;
}
/* NB: `tokens' can be NULL if we only want to count */
/* the number of array elements */
FT_LOCAL_DEF( void )
ps_parser_to_token_array( PS_Parser parser,
T1_Token tokens,
FT_UInt max_tokens,
FT_Int* pnum_tokens )
{
T1_TokenRec master;
*pnum_tokens = -1;
/* this also handles leading whitespace */
ps_parser_to_token( parser, &master );
if ( master.type == T1_TOKEN_TYPE_ARRAY )
{
FT_Byte* old_cursor = parser->cursor;
FT_Byte* old_limit = parser->limit;
T1_Token cur = tokens;
T1_Token limit = cur + max_tokens;
/* don't include outermost delimiters */
parser->cursor = master.start + 1;
parser->limit = master.limit - 1;
while ( parser->cursor < parser->limit )
{
T1_TokenRec token;
ps_parser_to_token( parser, &token );
if ( !token.type )
break;
if ( tokens && cur < limit )
*cur = token;
cur++;
}
*pnum_tokens = (FT_Int)( cur - tokens );
parser->cursor = old_cursor;
parser->limit = old_limit;
}
}
/* first character must be a delimiter or a part of a number */
/* NB: `coords' can be NULL if we just want to skip the */
/* array; in this case we ignore `max_coords' */
static FT_Int
ps_tocoordarray( FT_Byte* *acur,
FT_Byte* limit,
FT_Int max_coords,
FT_Short* coords )
{
FT_Byte* cur = *acur;
FT_Int count = 0;
FT_Byte c, ender;
if ( cur >= limit )
goto Exit;
/* check for the beginning of an array; otherwise, only one number */
/* will be read */
c = *cur;
ender = 0;
if ( c == '[' )
ender = ']';
else if ( c == '{' )
ender = '}';
if ( ender )
cur++;
/* now, read the coordinates */
while ( cur < limit )
{
FT_Short dummy;
FT_Byte* old_cur;
/* skip whitespace in front of data */
skip_spaces( &cur, limit );
if ( cur >= limit )
goto Exit;
if ( *cur == ender )
{
cur++;
break;
}
old_cur = cur;
if ( coords && count >= max_coords )
break;
/* call PS_Conv_ToFixed() even if coords == NULL */
/* to properly parse number at `cur' */
*( coords ? &coords[count] : &dummy ) =
(FT_Short)( PS_Conv_ToFixed( &cur, limit, 0 ) >> 16 );
if ( old_cur == cur )
{
count = -1;
goto Exit;
}
else
count++;
if ( !ender )
break;
}
Exit:
*acur = cur;
return count;
}
/* first character must be a delimiter or a part of a number */
/* NB: `values' can be NULL if we just want to skip the */
/* array; in this case we ignore `max_values' */
/* */
/* return number of successfully parsed values */
static FT_Int
ps_tofixedarray( FT_Byte* *acur,
FT_Byte* limit,
FT_Int max_values,
FT_Fixed* values,
FT_Int power_ten )
{
FT_Byte* cur = *acur;
FT_Int count = 0;
FT_Byte c, ender;
if ( cur >= limit )
goto Exit;
/* Check for the beginning of an array. Otherwise, only one number */
/* will be read. */
c = *cur;
ender = 0;
if ( c == '[' )
ender = ']';
else if ( c == '{' )
ender = '}';
if ( ender )
cur++;
/* now, read the values */
while ( cur < limit )
{
FT_Fixed dummy;
FT_Byte* old_cur;
/* skip whitespace in front of data */
skip_spaces( &cur, limit );
if ( cur >= limit )
goto Exit;
if ( *cur == ender )
{
cur++;
break;
}
old_cur = cur;
if ( values && count >= max_values )
break;
/* call PS_Conv_ToFixed() even if coords == NULL */
/* to properly parse number at `cur' */
*( values ? &values[count] : &dummy ) =
PS_Conv_ToFixed( &cur, limit, power_ten );
if ( old_cur == cur )
{
count = -1;
goto Exit;
}
else
count++;
if ( !ender )
break;
}
Exit:
*acur = cur;
return count;
}
#if 0
static FT_String*
ps_tostring( FT_Byte** cursor,
FT_Byte* limit,
FT_Memory memory )
{
FT_Byte* cur = *cursor;
FT_UInt len = 0;
FT_Int count;
FT_String* result;
FT_Error error;
/* XXX: some stupid fonts have a `Notice' or `Copyright' string */
/* that simply doesn't begin with an opening parenthesis, even */
/* though they have a closing one! E.g. "amuncial.pfb" */
/* */
/* We must deal with these ill-fated cases there. Note that */
/* these fonts didn't work with the old Type 1 driver as the */
/* notice/copyright was not recognized as a valid string token */
/* and made the old token parser commit errors. */
while ( cur < limit && ( *cur == ' ' || *cur == '\t' ) )
cur++;
if ( cur + 1 >= limit )
return 0;
if ( *cur == '(' )
cur++; /* skip the opening parenthesis, if there is one */
*cursor = cur;
count = 0;
/* then, count its length */
for ( ; cur < limit; cur++ )
{
if ( *cur == '(' )
count++;
else if ( *cur == ')' )
{
count--;
if ( count < 0 )
break;
}
}
len = (FT_UInt)( cur - *cursor );
if ( cur >= limit || FT_QALLOC( result, len + 1 ) )
return 0;
/* now copy the string */
FT_MEM_COPY( result, *cursor, len );
result[len] = '\0';
*cursor = cur;
return result;
}
#endif /* 0 */
static int
ps_tobool( FT_Byte* *acur,
FT_Byte* limit )
{
FT_Byte* cur = *acur;
FT_Bool result = 0;
/* return 1 if we find `true', 0 otherwise */
if ( cur + 3 < limit &&
cur[0] == 't' &&
cur[1] == 'r' &&
cur[2] == 'u' &&
cur[3] == 'e' )
{
result = 1;
cur += 5;
}
else if ( cur + 4 < limit &&
cur[0] == 'f' &&
cur[1] == 'a' &&
cur[2] == 'l' &&
cur[3] == 's' &&
cur[4] == 'e' )
{
result = 0;
cur += 6;
}
*acur = cur;
return result;
}
/* load a simple field (i.e. non-table) into the current list of objects */
FT_LOCAL_DEF( FT_Error )
ps_parser_load_field( PS_Parser parser,
const T1_Field field,
void** objects,
FT_UInt max_objects,
FT_ULong* pflags )
{
T1_TokenRec token;
FT_Byte* cur;
FT_Byte* limit;
FT_UInt count;
FT_UInt idx;
FT_Error error;
T1_FieldType type;
/* this also skips leading whitespace */
ps_parser_to_token( parser, &token );
if ( !token.type )
goto Fail;
count = 1;
idx = 0;
cur = token.start;
limit = token.limit;
type = field->type;
/* we must detect arrays in /FontBBox */
if ( type == T1_FIELD_TYPE_BBOX )
{
T1_TokenRec token2;
FT_Byte* old_cur = parser->cursor;
FT_Byte* old_limit = parser->limit;
/* don't include delimiters */
parser->cursor = token.start + 1;
parser->limit = token.limit - 1;
ps_parser_to_token( parser, &token2 );
parser->cursor = old_cur;
parser->limit = old_limit;
if ( token2.type == T1_TOKEN_TYPE_ARRAY )
{
type = T1_FIELD_TYPE_MM_BBOX;
goto FieldArray;
}
}
else if ( token.type == T1_TOKEN_TYPE_ARRAY )
{
count = max_objects;
FieldArray:
/* if this is an array and we have no blend, an error occurs */
if ( max_objects == 0 )
goto Fail;
idx = 1;
/* don't include delimiters */
cur++;
limit--;
}
for ( ; count > 0; count--, idx++ )
{
FT_Byte* q = (FT_Byte*)objects[idx] + field->offset;
FT_Long val;
skip_spaces( &cur, limit );
switch ( type )
{
case T1_FIELD_TYPE_BOOL:
val = ps_tobool( &cur, limit );
FT_TRACE4(( " %s", val ? "true" : "false" ));
goto Store_Integer;
case T1_FIELD_TYPE_FIXED:
val = PS_Conv_ToFixed( &cur, limit, 0 );
FT_TRACE4(( " %f", (double)val / 65536 ));
goto Store_Integer;
case T1_FIELD_TYPE_FIXED_1000:
val = PS_Conv_ToFixed( &cur, limit, 3 );
FT_TRACE4(( " %f", (double)val / 65536 / 1000 ));
goto Store_Integer;
case T1_FIELD_TYPE_INTEGER:
val = PS_Conv_ToInt( &cur, limit );
FT_TRACE4(( " %ld", val ));
/* fall through */
Store_Integer:
switch ( field->size )
{
case (8 / FT_CHAR_BIT):
*(FT_Byte*)q = (FT_Byte)val;
break;
case (16 / FT_CHAR_BIT):
*(FT_UShort*)q = (FT_UShort)val;
break;
case (32 / FT_CHAR_BIT):
*(FT_UInt32*)q = (FT_UInt32)val;
break;
default: /* for 64-bit systems */
*(FT_Long*)q = val;
}
break;
case T1_FIELD_TYPE_STRING:
case T1_FIELD_TYPE_KEY:
{
FT_Memory memory = parser->memory;
FT_UInt len = (FT_UInt)( limit - cur );
FT_String* string;
if ( cur >= limit )
break;
/* we allow both a string or a name */
/* for cases like /FontName (foo) def */
if ( token.type == T1_TOKEN_TYPE_KEY )
{
/* don't include leading `/' */
len--;
cur++;
}
else if ( token.type == T1_TOKEN_TYPE_STRING )
{
/* don't include delimiting parentheses */
/* XXX we don't handle <<...>> here */
/* XXX should we convert octal escapes? */
/* if so, what encoding should we use? */
cur++;
len -= 2;
}
else
{
FT_ERROR(( "ps_parser_load_field:"
" expected a name or string\n" ));
FT_ERROR(( " "
" but found token of type %d instead\n",
token.type ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
/* for this to work (FT_String**)q must have been */
/* initialized to NULL */
if ( *(FT_String**)q )
{
FT_TRACE0(( "ps_parser_load_field: overwriting field %s\n",
field->ident ));
FT_FREE( *(FT_String**)q );
}
if ( FT_QALLOC( string, len + 1 ) )
goto Exit;
FT_MEM_COPY( string, cur, len );
string[len] = 0;
#ifdef FT_DEBUG_LEVEL_TRACE
if ( token.type == T1_TOKEN_TYPE_STRING )
FT_TRACE4(( " (%s)", string ));
else
FT_TRACE4(( " /%s", string ));
#endif
*(FT_String**)q = string;
}
break;
case T1_FIELD_TYPE_BBOX:
{
FT_Fixed temp[4];
FT_BBox* bbox = (FT_BBox*)q;
FT_Int result;
result = ps_tofixedarray( &cur, limit, 4, temp, 0 );
if ( result < 4 )
{
FT_ERROR(( "ps_parser_load_field:"
" expected four integers in bounding box\n" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
bbox->xMin = FT_RoundFix( temp[0] );
bbox->yMin = FT_RoundFix( temp[1] );
bbox->xMax = FT_RoundFix( temp[2] );
bbox->yMax = FT_RoundFix( temp[3] );
FT_TRACE4(( " [%ld %ld %ld %ld]",
bbox->xMin / 65536,
bbox->yMin / 65536,
bbox->xMax / 65536,
bbox->yMax / 65536 ));
}
break;
case T1_FIELD_TYPE_MM_BBOX:
{
FT_Memory memory = parser->memory;
FT_Fixed* temp = NULL;
FT_Int result;
FT_UInt i;
if ( FT_QNEW_ARRAY( temp, max_objects * 4 ) )
goto Exit;
for ( i = 0; i < 4; i++ )
{
result = ps_tofixedarray( &cur, limit, (FT_Int)max_objects,
temp + i * max_objects, 0 );
if ( result < 0 || (FT_UInt)result < max_objects )
{
FT_ERROR(( "ps_parser_load_field:"
" expected %d integer%s in the %s subarray\n",
max_objects, max_objects > 1 ? "s" : "",
i == 0 ? "first"
: ( i == 1 ? "second"
: ( i == 2 ? "third"
: "fourth" ) ) ));
FT_ERROR(( " "
" of /FontBBox in the /Blend dictionary\n" ));
error = FT_THROW( Invalid_File_Format );
FT_FREE( temp );
goto Exit;
}
skip_spaces( &cur, limit );
}
FT_TRACE4(( " [" ));
for ( i = 0; i < max_objects; i++ )
{
FT_BBox* bbox = (FT_BBox*)objects[i];
bbox->xMin = FT_RoundFix( temp[i ] );
bbox->yMin = FT_RoundFix( temp[i + max_objects] );
bbox->xMax = FT_RoundFix( temp[i + 2 * max_objects] );
bbox->yMax = FT_RoundFix( temp[i + 3 * max_objects] );
FT_TRACE4(( " [%ld %ld %ld %ld]",
bbox->xMin / 65536,
bbox->yMin / 65536,
bbox->xMax / 65536,
bbox->yMax / 65536 ));
}
FT_TRACE4(( "]" ));
FT_FREE( temp );
}
break;
default:
/* an error occurred */
goto Fail;
}
}
#if 0 /* obsolete -- keep for reference */
if ( pflags )
*pflags |= 1L << field->flag_bit;
#else
FT_UNUSED( pflags );
#endif
error = FT_Err_Ok;
Exit:
return error;
Fail:
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
#define T1_MAX_TABLE_ELEMENTS 32
FT_LOCAL_DEF( FT_Error )
ps_parser_load_field_table( PS_Parser parser,
const T1_Field field,
void** objects,
FT_UInt max_objects,
FT_ULong* pflags )
{
T1_TokenRec elements[T1_MAX_TABLE_ELEMENTS];
T1_Token token;
FT_Int num_elements;
FT_Error error = FT_Err_Ok;
FT_Byte* old_cursor;
FT_Byte* old_limit;
T1_FieldRec fieldrec = *(T1_Field)field;
fieldrec.type = T1_FIELD_TYPE_INTEGER;
if ( field->type == T1_FIELD_TYPE_FIXED_ARRAY ||
field->type == T1_FIELD_TYPE_BBOX )
fieldrec.type = T1_FIELD_TYPE_FIXED;
ps_parser_to_token_array( parser, elements,
T1_MAX_TABLE_ELEMENTS, &num_elements );
if ( num_elements < 0 )
{
error = FT_ERR( Ignore );
goto Exit;
}
if ( (FT_UInt)num_elements > field->array_max )
num_elements = (FT_Int)field->array_max;
old_cursor = parser->cursor;
old_limit = parser->limit;
/* we store the elements count if necessary; */
/* we further assume that `count_offset' can't be zero */
if ( field->type != T1_FIELD_TYPE_BBOX && field->count_offset != 0 )
*(FT_Byte*)( (FT_Byte*)objects[0] + field->count_offset ) =
(FT_Byte)num_elements;
FT_TRACE4(( " [" ));
/* we now load each element, adjusting the field.offset on each one */
token = elements;
for ( ; num_elements > 0; num_elements--, token++ )
{
parser->cursor = token->start;
parser->limit = token->limit;
error = ps_parser_load_field( parser,
&fieldrec,
objects,
max_objects,
0 );
if ( error )
break;
fieldrec.offset += fieldrec.size;
}
FT_TRACE4(( "]" ));
#if 0 /* obsolete -- keep for reference */
if ( pflags )
*pflags |= 1L << field->flag_bit;
#else
FT_UNUSED( pflags );
#endif
parser->cursor = old_cursor;
parser->limit = old_limit;
Exit:
return error;
}
FT_LOCAL_DEF( FT_Long )
ps_parser_to_int( PS_Parser parser )
{
ps_parser_skip_spaces( parser );
return PS_Conv_ToInt( &parser->cursor, parser->limit );
}
/* first character must be `<' if `delimiters' is non-zero */
FT_LOCAL_DEF( FT_Error )
ps_parser_to_bytes( PS_Parser parser,
FT_Byte* bytes,
FT_Offset max_bytes,
FT_ULong* pnum_bytes,
FT_Bool delimiters )
{
FT_Error error = FT_Err_Ok;
FT_Byte* cur;
ps_parser_skip_spaces( parser );
cur = parser->cursor;
if ( cur >= parser->limit )
goto Exit;
if ( delimiters )
{
if ( *cur != '<' )
{
FT_ERROR(( "ps_parser_to_bytes: Missing starting delimiter `<'\n" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
cur++;
}
*pnum_bytes = PS_Conv_ASCIIHexDecode( &cur,
parser->limit,
bytes,
max_bytes );
parser->cursor = cur;
if ( delimiters )
{
if ( cur < parser->limit && *cur != '>' )
{
FT_ERROR(( "ps_parser_to_bytes: Missing closing delimiter `>'\n" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
parser->cursor++;
}
Exit:
return error;
}
FT_LOCAL_DEF( FT_Fixed )
ps_parser_to_fixed( PS_Parser parser,
FT_Int power_ten )
{
ps_parser_skip_spaces( parser );
return PS_Conv_ToFixed( &parser->cursor, parser->limit, power_ten );
}
FT_LOCAL_DEF( FT_Int )
ps_parser_to_coord_array( PS_Parser parser,
FT_Int max_coords,
FT_Short* coords )
{
ps_parser_skip_spaces( parser );
return ps_tocoordarray( &parser->cursor, parser->limit,
max_coords, coords );
}
FT_LOCAL_DEF( FT_Int )
ps_parser_to_fixed_array( PS_Parser parser,
FT_Int max_values,
FT_Fixed* values,
FT_Int power_ten )
{
ps_parser_skip_spaces( parser );
return ps_tofixedarray( &parser->cursor, parser->limit,
max_values, values, power_ten );
}
#if 0
FT_LOCAL_DEF( FT_String* )
T1_ToString( PS_Parser parser )
{
return ps_tostring( &parser->cursor, parser->limit, parser->memory );
}
FT_LOCAL_DEF( FT_Bool )
T1_ToBool( PS_Parser parser )
{
return ps_tobool( &parser->cursor, parser->limit );
}
#endif /* 0 */
FT_LOCAL_DEF( void )
ps_parser_init( PS_Parser parser,
FT_Byte* base,
FT_Byte* limit,
FT_Memory memory )
{
parser->error = FT_Err_Ok;
parser->base = base;
parser->limit = limit;
parser->cursor = base;
parser->memory = memory;
parser->funcs = ps_parser_funcs;
}
FT_LOCAL_DEF( void )
ps_parser_done( PS_Parser parser )
{
FT_UNUSED( parser );
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** T1 BUILDER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* @Function:
* t1_builder_init
*
* @Description:
* Initializes a given glyph builder.
*
* @InOut:
* builder ::
* A pointer to the glyph builder to initialize.
*
* @Input:
* face ::
* The current face object.
*
* size ::
* The current size object.
*
* glyph ::
* The current glyph object.
*
* hinting ::
* Whether hinting should be applied.
*/
FT_LOCAL_DEF( void )
t1_builder_init( T1_Builder builder,
FT_Face face,
FT_Size size,
FT_GlyphSlot glyph,
FT_Bool hinting )
{
builder->parse_state = T1_Parse_Start;
builder->load_points = 1;
builder->face = face;
builder->glyph = glyph;
builder->memory = face->memory;
if ( glyph )
{
FT_GlyphLoader loader = glyph->internal->loader;
builder->loader = loader;
builder->base = &loader->base.outline;
builder->current = &loader->current.outline;
FT_GlyphLoader_Rewind( loader );
builder->hints_globals = size->internal->module_data;
builder->hints_funcs = NULL;
if ( hinting )
builder->hints_funcs = glyph->internal->glyph_hints;
}
builder->pos_x = 0;
builder->pos_y = 0;
builder->left_bearing.x = 0;
builder->left_bearing.y = 0;
builder->advance.x = 0;
builder->advance.y = 0;
builder->funcs = t1_builder_funcs;
}
/**************************************************************************
*
* @Function:
* t1_builder_done
*
* @Description:
* Finalizes a given glyph builder. Its contents can still be used
* after the call, but the function saves important information
* within the corresponding glyph slot.
*
* @Input:
* builder ::
* A pointer to the glyph builder to finalize.
*/
FT_LOCAL_DEF( void )
t1_builder_done( T1_Builder builder )
{
FT_GlyphSlot glyph = builder->glyph;
if ( glyph )
glyph->outline = *builder->base;
}
/* check that there is enough space for `count' more points */
FT_LOCAL_DEF( FT_Error )
t1_builder_check_points( T1_Builder builder,
FT_Int count )
{
return FT_GLYPHLOADER_CHECK_POINTS( builder->loader, count, 0 );
}
/* add a new point, do not check space */
FT_LOCAL_DEF( void )
t1_builder_add_point( T1_Builder builder,
FT_Pos x,
FT_Pos y,
FT_Byte flag )
{
FT_Outline* outline = builder->current;
if ( builder->load_points )
{
FT_Vector* point = outline->points + outline->n_points;
FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points;
point->x = FIXED_TO_INT( x );
point->y = FIXED_TO_INT( y );
*control = (FT_Byte)( flag ? FT_CURVE_TAG_ON : FT_CURVE_TAG_CUBIC );
}
outline->n_points++;
}
/* check space for a new on-curve point, then add it */
FT_LOCAL_DEF( FT_Error )
t1_builder_add_point1( T1_Builder builder,
FT_Pos x,
FT_Pos y )
{
FT_Error error;
error = t1_builder_check_points( builder, 1 );
if ( !error )
t1_builder_add_point( builder, x, y, 1 );
return error;
}
/* check space for a new contour, then add it */
FT_LOCAL_DEF( FT_Error )
t1_builder_add_contour( T1_Builder builder )
{
FT_Outline* outline = builder->current;
FT_Error error;
/* this might happen in invalid fonts */
if ( !outline )
{
FT_ERROR(( "t1_builder_add_contour: no outline to add points to\n" ));
return FT_THROW( Invalid_File_Format );
}
if ( !builder->load_points )
{
outline->n_contours++;
return FT_Err_Ok;
}
error = FT_GLYPHLOADER_CHECK_POINTS( builder->loader, 0, 1 );
if ( !error )
{
if ( outline->n_contours > 0 )
outline->contours[outline->n_contours - 1] =
(short)( outline->n_points - 1 );
outline->n_contours++;
}
return error;
}
/* if a path was begun, add its first on-curve point */
FT_LOCAL_DEF( FT_Error )
t1_builder_start_point( T1_Builder builder,
FT_Pos x,
FT_Pos y )
{
FT_Error error = FT_ERR( Invalid_File_Format );
/* test whether we are building a new contour */
if ( builder->parse_state == T1_Parse_Have_Path )
error = FT_Err_Ok;
else
{
builder->parse_state = T1_Parse_Have_Path;
error = t1_builder_add_contour( builder );
if ( !error )
error = t1_builder_add_point1( builder, x, y );
}
return error;
}
/* close the current contour */
FT_LOCAL_DEF( void )
t1_builder_close_contour( T1_Builder builder )
{
FT_Outline* outline = builder->current;
FT_Int first;
if ( !outline )
return;
first = outline->n_contours <= 1
? 0 : outline->contours[outline->n_contours - 2] + 1;
/* in malformed fonts it can happen that a contour was started */
/* but no points were added */
if ( outline->n_contours && first == outline->n_points )
{
outline->n_contours--;
return;
}
/* We must not include the last point in the path if it */
/* is located on the first point. */
if ( outline->n_points > 1 )
{
FT_Vector* p1 = outline->points + first;
FT_Vector* p2 = outline->points + outline->n_points - 1;
FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points - 1;
/* `delete' last point only if it coincides with the first */
/* point and it is not a control point (which can happen). */
if ( p1->x == p2->x && p1->y == p2->y )
if ( *control == FT_CURVE_TAG_ON )
outline->n_points--;
}
if ( outline->n_contours > 0 )
{
/* Don't add contours only consisting of one point, i.e., */
/* check whether the first and the last point is the same. */
if ( first == outline->n_points - 1 )
{
outline->n_contours--;
outline->n_points--;
}
else
outline->contours[outline->n_contours - 1] =
(short)( outline->n_points - 1 );
}
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** CFF BUILDER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* @Function:
* cff_builder_init
*
* @Description:
* Initializes a given glyph builder.
*
* @InOut:
* builder ::
* A pointer to the glyph builder to initialize.
*
* @Input:
* face ::
* The current face object.
*
* size ::
* The current size object.
*
* glyph ::
* The current glyph object.
*
* hinting ::
* Whether hinting is active.
*/
FT_LOCAL_DEF( void )
cff_builder_init( CFF_Builder* builder,
TT_Face face,
CFF_Size size,
CFF_GlyphSlot glyph,
FT_Bool hinting )
{
builder->path_begun = 0;
builder->load_points = 1;
builder->face = face;
builder->glyph = glyph;
builder->memory = face->root.memory;
if ( glyph )
{
FT_GlyphLoader loader = glyph->root.internal->loader;
builder->loader = loader;
builder->base = &loader->base.outline;
builder->current = &loader->current.outline;
FT_GlyphLoader_Rewind( loader );
builder->hints_globals = NULL;
builder->hints_funcs = NULL;
if ( hinting && size )
{
FT_Size ftsize = FT_SIZE( size );
CFF_Internal internal = (CFF_Internal)ftsize->internal->module_data;
if ( internal )
{
builder->hints_globals = (void *)internal->topfont;
builder->hints_funcs = glyph->root.internal->glyph_hints;
}
}
}
builder->pos_x = 0;
builder->pos_y = 0;
builder->left_bearing.x = 0;
builder->left_bearing.y = 0;
builder->advance.x = 0;
builder->advance.y = 0;
builder->funcs = cff_builder_funcs;
}
/**************************************************************************
*
* @Function:
* cff_builder_done
*
* @Description:
* Finalizes a given glyph builder. Its contents can still be used
* after the call, but the function saves important information
* within the corresponding glyph slot.
*
* @Input:
* builder ::
* A pointer to the glyph builder to finalize.
*/
FT_LOCAL_DEF( void )
cff_builder_done( CFF_Builder* builder )
{
CFF_GlyphSlot glyph = builder->glyph;
if ( glyph )
glyph->root.outline = *builder->base;
}
/* check that there is enough space for `count' more points */
FT_LOCAL_DEF( FT_Error )
cff_check_points( CFF_Builder* builder,
FT_Int count )
{
return FT_GLYPHLOADER_CHECK_POINTS( builder->loader, count, 0 );
}
/* add a new point, do not check space */
FT_LOCAL_DEF( void )
cff_builder_add_point( CFF_Builder* builder,
FT_Pos x,
FT_Pos y,
FT_Byte flag )
{
FT_Outline* outline = builder->current;
if ( builder->load_points )
{
FT_Vector* point = outline->points + outline->n_points;
FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points;
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
PS_Driver driver = (PS_Driver)FT_FACE_DRIVER( builder->face );
if ( driver->hinting_engine == FT_HINTING_FREETYPE )
{
point->x = x >> 16;
point->y = y >> 16;
}
else
#endif
{
/* cf2_decoder_parse_charstrings uses 16.16 coordinates */
point->x = x >> 10;
point->y = y >> 10;
}
*control = (FT_Byte)( flag ? FT_CURVE_TAG_ON : FT_CURVE_TAG_CUBIC );
}
outline->n_points++;
}
/* check space for a new on-curve point, then add it */
FT_LOCAL_DEF( FT_Error )
cff_builder_add_point1( CFF_Builder* builder,
FT_Pos x,
FT_Pos y )
{
FT_Error error;
error = cff_check_points( builder, 1 );
if ( !error )
cff_builder_add_point( builder, x, y, 1 );
return error;
}
/* check space for a new contour, then add it */
FT_LOCAL_DEF( FT_Error )
cff_builder_add_contour( CFF_Builder* builder )
{
FT_Outline* outline = builder->current;
FT_Error error;
if ( !builder->load_points )
{
outline->n_contours++;
return FT_Err_Ok;
}
error = FT_GLYPHLOADER_CHECK_POINTS( builder->loader, 0, 1 );
if ( !error )
{
if ( outline->n_contours > 0 )
outline->contours[outline->n_contours - 1] =
(short)( outline->n_points - 1 );
outline->n_contours++;
}
return error;
}
/* if a path was begun, add its first on-curve point */
FT_LOCAL_DEF( FT_Error )
cff_builder_start_point( CFF_Builder* builder,
FT_Pos x,
FT_Pos y )
{
FT_Error error = FT_Err_Ok;
/* test whether we are building a new contour */
if ( !builder->path_begun )
{
builder->path_begun = 1;
error = cff_builder_add_contour( builder );
if ( !error )
error = cff_builder_add_point1( builder, x, y );
}
return error;
}
/* close the current contour */
FT_LOCAL_DEF( void )
cff_builder_close_contour( CFF_Builder* builder )
{
FT_Outline* outline = builder->current;
FT_Int first;
if ( !outline )
return;
first = outline->n_contours <= 1
? 0 : outline->contours[outline->n_contours - 2] + 1;
/* in malformed fonts it can happen that a contour was started */
/* but no points were added */
if ( outline->n_contours && first == outline->n_points )
{
outline->n_contours--;
return;
}
/* We must not include the last point in the path if it */
/* is located on the first point. */
if ( outline->n_points > 1 )
{
FT_Vector* p1 = outline->points + first;
FT_Vector* p2 = outline->points + outline->n_points - 1;
FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points - 1;
/* `delete' last point only if it coincides with the first */
/* point and if it is not a control point (which can happen). */
if ( p1->x == p2->x && p1->y == p2->y )
if ( *control == FT_CURVE_TAG_ON )
outline->n_points--;
}
if ( outline->n_contours > 0 )
{
/* Don't add contours only consisting of one point, i.e., */
/* check whether begin point and last point are the same. */
if ( first == outline->n_points - 1 )
{
outline->n_contours--;
outline->n_points--;
}
else
outline->contours[outline->n_contours - 1] =
(short)( outline->n_points - 1 );
}
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** PS BUILDER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* @Function:
* ps_builder_init
*
* @Description:
* Initializes a given glyph builder.
*
* @InOut:
* builder ::
* A pointer to the glyph builder to initialize.
*
* @Input:
* face ::
* The current face object.
*
* size ::
* The current size object.
*
* glyph ::
* The current glyph object.
*
* hinting ::
* Whether hinting should be applied.
*/
FT_LOCAL_DEF( void )
ps_builder_init( PS_Builder* ps_builder,
void* builder,
FT_Bool is_t1 )
{
FT_ZERO( ps_builder );
if ( is_t1 )
{
T1_Builder t1builder = (T1_Builder)builder;
ps_builder->memory = t1builder->memory;
ps_builder->face = (FT_Face)t1builder->face;
ps_builder->glyph = (CFF_GlyphSlot)t1builder->glyph;
ps_builder->loader = t1builder->loader;
ps_builder->base = t1builder->base;
ps_builder->current = t1builder->current;
ps_builder->pos_x = &t1builder->pos_x;
ps_builder->pos_y = &t1builder->pos_y;
ps_builder->left_bearing = &t1builder->left_bearing;
ps_builder->advance = &t1builder->advance;
ps_builder->bbox = &t1builder->bbox;
ps_builder->path_begun = 0;
ps_builder->load_points = t1builder->load_points;
ps_builder->no_recurse = t1builder->no_recurse;
ps_builder->metrics_only = t1builder->metrics_only;
}
else
{
CFF_Builder* cffbuilder = (CFF_Builder*)builder;
ps_builder->memory = cffbuilder->memory;
ps_builder->face = (FT_Face)cffbuilder->face;
ps_builder->glyph = cffbuilder->glyph;
ps_builder->loader = cffbuilder->loader;
ps_builder->base = cffbuilder->base;
ps_builder->current = cffbuilder->current;
ps_builder->pos_x = &cffbuilder->pos_x;
ps_builder->pos_y = &cffbuilder->pos_y;
ps_builder->left_bearing = &cffbuilder->left_bearing;
ps_builder->advance = &cffbuilder->advance;
ps_builder->bbox = &cffbuilder->bbox;
ps_builder->path_begun = cffbuilder->path_begun;
ps_builder->load_points = cffbuilder->load_points;
ps_builder->no_recurse = cffbuilder->no_recurse;
ps_builder->metrics_only = cffbuilder->metrics_only;
}
ps_builder->is_t1 = is_t1;
ps_builder->funcs = ps_builder_funcs;
}
/**************************************************************************
*
* @Function:
* ps_builder_done
*
* @Description:
* Finalizes a given glyph builder. Its contents can still be used
* after the call, but the function saves important information
* within the corresponding glyph slot.
*
* @Input:
* builder ::
* A pointer to the glyph builder to finalize.
*/
FT_LOCAL_DEF( void )
ps_builder_done( PS_Builder* builder )
{
CFF_GlyphSlot glyph = builder->glyph;
if ( glyph )
glyph->root.outline = *builder->base;
}
/* check that there is enough space for `count' more points */
FT_LOCAL_DEF( FT_Error )
ps_builder_check_points( PS_Builder* builder,
FT_Int count )
{
return FT_GLYPHLOADER_CHECK_POINTS( builder->loader, count, 0 );
}
/* add a new point, do not check space */
FT_LOCAL_DEF( void )
ps_builder_add_point( PS_Builder* builder,
FT_Pos x,
FT_Pos y,
FT_Byte flag )
{
FT_Outline* outline = builder->current;
if ( builder->load_points )
{
FT_Vector* point = outline->points + outline->n_points;
FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points;
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
PS_Driver driver = (PS_Driver)FT_FACE_DRIVER( builder->face );
if ( !builder->is_t1 &&
driver->hinting_engine == FT_HINTING_FREETYPE )
{
point->x = x >> 16;
point->y = y >> 16;
}
else
#endif
#ifdef T1_CONFIG_OPTION_OLD_ENGINE
#ifndef CFF_CONFIG_OPTION_OLD_ENGINE
PS_Driver driver = (PS_Driver)FT_FACE_DRIVER( builder->face );
#endif
if ( builder->is_t1 &&
driver->hinting_engine == FT_HINTING_FREETYPE )
{
point->x = FIXED_TO_INT( x );
point->y = FIXED_TO_INT( y );
}
else
#endif
{
/* cf2_decoder_parse_charstrings uses 16.16 coordinates */
point->x = x >> 10;
point->y = y >> 10;
}
*control = (FT_Byte)( flag ? FT_CURVE_TAG_ON : FT_CURVE_TAG_CUBIC );
}
outline->n_points++;
}
/* check space for a new on-curve point, then add it */
FT_LOCAL_DEF( FT_Error )
ps_builder_add_point1( PS_Builder* builder,
FT_Pos x,
FT_Pos y )
{
FT_Error error;
error = ps_builder_check_points( builder, 1 );
if ( !error )
ps_builder_add_point( builder, x, y, 1 );
return error;
}
/* check space for a new contour, then add it */
FT_LOCAL_DEF( FT_Error )
ps_builder_add_contour( PS_Builder* builder )
{
FT_Outline* outline = builder->current;
FT_Error error;
/* this might happen in invalid fonts */
if ( !outline )
{
FT_ERROR(( "ps_builder_add_contour: no outline to add points to\n" ));
return FT_THROW( Invalid_File_Format );
}
if ( !builder->load_points )
{
outline->n_contours++;
return FT_Err_Ok;
}
error = FT_GLYPHLOADER_CHECK_POINTS( builder->loader, 0, 1 );
if ( !error )
{
if ( outline->n_contours > 0 )
outline->contours[outline->n_contours - 1] =
(short)( outline->n_points - 1 );
outline->n_contours++;
}
return error;
}
/* if a path was begun, add its first on-curve point */
FT_LOCAL_DEF( FT_Error )
ps_builder_start_point( PS_Builder* builder,
FT_Pos x,
FT_Pos y )
{
FT_Error error = FT_Err_Ok;
/* test whether we are building a new contour */
if ( !builder->path_begun )
{
builder->path_begun = 1;
error = ps_builder_add_contour( builder );
if ( !error )
error = ps_builder_add_point1( builder, x, y );
}
return error;
}
/* close the current contour */
FT_LOCAL_DEF( void )
ps_builder_close_contour( PS_Builder* builder )
{
FT_Outline* outline = builder->current;
FT_Int first;
if ( !outline )
return;
first = outline->n_contours <= 1
? 0 : outline->contours[outline->n_contours - 2] + 1;
/* in malformed fonts it can happen that a contour was started */
/* but no points were added */
if ( outline->n_contours && first == outline->n_points )
{
outline->n_contours--;
return;
}
/* We must not include the last point in the path if it */
/* is located on the first point. */
if ( outline->n_points > 1 )
{
FT_Vector* p1 = outline->points + first;
FT_Vector* p2 = outline->points + outline->n_points - 1;
FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points - 1;
/* `delete' last point only if it coincides with the first */
/* point and it is not a control point (which can happen). */
if ( p1->x == p2->x && p1->y == p2->y )
if ( *control == FT_CURVE_TAG_ON )
outline->n_points--;
}
if ( outline->n_contours > 0 )
{
/* Don't add contours only consisting of one point, i.e., */
/* check whether the first and the last point is the same. */
if ( first == outline->n_points - 1 )
{
outline->n_contours--;
outline->n_points--;
}
else
outline->contours[outline->n_contours - 1] =
(short)( outline->n_points - 1 );
}
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** OTHER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* @Function:
* ps_decoder_init
*
* @Description:
* Creates a wrapper decoder for use in the combined
* Type 1 / CFF interpreter.
*
* @InOut:
* ps_decoder ::
* A pointer to the decoder to initialize.
*
* @Input:
* decoder ::
* A pointer to the original decoder.
*
* is_t1 ::
* Flag indicating Type 1 or CFF
*/
FT_LOCAL_DEF( void )
ps_decoder_init( PS_Decoder* ps_decoder,
void* decoder,
FT_Bool is_t1 )
{
FT_ZERO( ps_decoder );
if ( is_t1 )
{
T1_Decoder t1_decoder = (T1_Decoder)decoder;
ps_builder_init( &ps_decoder->builder,
&t1_decoder->builder,
is_t1 );
ps_decoder->cf2_instance = &t1_decoder->cf2_instance;
ps_decoder->psnames = t1_decoder->psnames;
ps_decoder->num_glyphs = t1_decoder->num_glyphs;
ps_decoder->glyph_names = t1_decoder->glyph_names;
ps_decoder->hint_mode = t1_decoder->hint_mode;
ps_decoder->blend = t1_decoder->blend;
ps_decoder->num_locals = (FT_UInt)t1_decoder->num_subrs;
ps_decoder->locals = t1_decoder->subrs;
ps_decoder->locals_len = t1_decoder->subrs_len;
ps_decoder->locals_hash = t1_decoder->subrs_hash;
ps_decoder->buildchar = t1_decoder->buildchar;
ps_decoder->len_buildchar = t1_decoder->len_buildchar;
ps_decoder->lenIV = t1_decoder->lenIV;
}
else
{
CFF_Decoder* cff_decoder = (CFF_Decoder*)decoder;
ps_builder_init( &ps_decoder->builder,
&cff_decoder->builder,
is_t1 );
ps_decoder->cff = cff_decoder->cff;
ps_decoder->cf2_instance = &cff_decoder->cff->cf2_instance;
ps_decoder->current_subfont = cff_decoder->current_subfont;
ps_decoder->num_globals = cff_decoder->num_globals;
ps_decoder->globals = cff_decoder->globals;
ps_decoder->globals_bias = cff_decoder->globals_bias;
ps_decoder->num_locals = cff_decoder->num_locals;
ps_decoder->locals = cff_decoder->locals;
ps_decoder->locals_bias = cff_decoder->locals_bias;
ps_decoder->glyph_width = &cff_decoder->glyph_width;
ps_decoder->width_only = cff_decoder->width_only;
ps_decoder->hint_mode = cff_decoder->hint_mode;
ps_decoder->get_glyph_callback = cff_decoder->get_glyph_callback;
ps_decoder->free_glyph_callback = cff_decoder->free_glyph_callback;
}
}
/* Synthesize a SubFont object for Type 1 fonts, for use in the */
/* new interpreter to access Private dict data. */
FT_LOCAL_DEF( void )
t1_make_subfont( FT_Face face,
PS_Private priv,
CFF_SubFont subfont )
{
CFF_Private cpriv = &subfont->private_dict;
FT_UInt n, count;
FT_ZERO( subfont );
FT_ZERO( cpriv );
count = cpriv->num_blue_values = priv->num_blue_values;
for ( n = 0; n < count; n++ )
cpriv->blue_values[n] = (FT_Pos)priv->blue_values[n];
count = cpriv->num_other_blues = priv->num_other_blues;
for ( n = 0; n < count; n++ )
cpriv->other_blues[n] = (FT_Pos)priv->other_blues[n];
count = cpriv->num_family_blues = priv->num_family_blues;
for ( n = 0; n < count; n++ )
cpriv->family_blues[n] = (FT_Pos)priv->family_blues[n];
count = cpriv->num_family_other_blues = priv->num_family_other_blues;
for ( n = 0; n < count; n++ )
cpriv->family_other_blues[n] = (FT_Pos)priv->family_other_blues[n];
cpriv->blue_scale = priv->blue_scale;
cpriv->blue_shift = (FT_Pos)priv->blue_shift;
cpriv->blue_fuzz = (FT_Pos)priv->blue_fuzz;
cpriv->standard_width = (FT_Pos)priv->standard_width[0];
cpriv->standard_height = (FT_Pos)priv->standard_height[0];
count = cpriv->num_snap_widths = priv->num_snap_widths;
for ( n = 0; n < count; n++ )
cpriv->snap_widths[n] = (FT_Pos)priv->snap_widths[n];
count = cpriv->num_snap_heights = priv->num_snap_heights;
for ( n = 0; n < count; n++ )
cpriv->snap_heights[n] = (FT_Pos)priv->snap_heights[n];
cpriv->force_bold = priv->force_bold;
cpriv->lenIV = priv->lenIV;
cpriv->language_group = priv->language_group;
cpriv->expansion_factor = priv->expansion_factor;
cpriv->subfont = subfont;
/* Initialize the random number generator. */
if ( face->internal->random_seed != -1 )
{
/* If we have a face-specific seed, use it. */
/* If non-zero, update it to a positive value. */
subfont->random = (FT_UInt32)face->internal->random_seed;
if ( face->internal->random_seed )
{
do
{
face->internal->random_seed = (FT_Int32)cff_random(
(FT_UInt32)face->internal->random_seed );
} while ( face->internal->random_seed < 0 );
}
}
if ( !subfont->random )
{
FT_UInt32 seed;
/* compute random seed from some memory addresses */
seed = (FT_UInt32)( (FT_Offset)(char*)&seed ^
(FT_Offset)(char*)&face ^
(FT_Offset)(char*)&subfont );
seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 );
if ( seed == 0 )
seed = 0x7384;
subfont->random = seed;
}
}
FT_LOCAL_DEF( void )
t1_decrypt( FT_Byte* buffer,
FT_Offset length,
FT_UShort seed )
{
PS_Conv_EexecDecode( &buffer,
FT_OFFSET( buffer, length ),
buffer,
length,
&seed );
}
FT_LOCAL_DEF( FT_UInt32 )
cff_random( FT_UInt32 r )
{
/* a 32bit version of the `xorshift' algorithm */
r ^= r << 13;
r ^= r >> 17;
r ^= r << 5;
return r;
}
/* END */