ref: 9ca7a157273201e4e40168e7b239e12bb813f9a7
dir: /src/psaux/psobjs.c/
/***************************************************************************/
/* */
/* psobjs.c */
/* */
/* Auxiliary functions for PostScript fonts (body). */
/* */
/* Copyright 1996-2001, 2002 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 <ft2build.h>
#include FT_INTERNAL_POSTSCRIPT_AUX_H
#include FT_INTERNAL_DEBUG_H
#include "psobjs.h"
#include "psauxerr.h"
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** 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 = 0;
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_Long delta = (FT_Long)( 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_Int 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 ) )
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 PSaux_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,
void* object,
FT_Int length )
{
if ( idx < 0 || idx > table->max_elems )
{
FT_ERROR(( "PS_Table_Add: invalid index\n" ));
return PSaux_Err_Invalid_Argument;
}
/* grow the base block if needed */
if ( table->cursor + length > table->capacity )
{
FT_Error error;
FT_Offset new_size = table->capacity;
FT_Long in_offset;
in_offset = (FT_Long)((FT_Byte*)object - table->block);
if ( (FT_ULong)in_offset >= table->capacity )
in_offset = -1;
while ( new_size < table->cursor + length )
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] = table->block + table->cursor;
table->lengths [idx] = length;
FT_MEM_COPY( table->block + table->cursor, object, length );
table->cursor += length;
return PSaux_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_ALLOC( 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_UNUSED( error );
}
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 *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#define IS_T1_WHITESPACE( c ) ( (c) == ' ' || (c) == '\t' )
#define IS_T1_LINESPACE( c ) ( (c) == '\r' || (c) == '\n' )
#define IS_T1_SPACE( c ) ( IS_T1_WHITESPACE( c ) || IS_T1_LINESPACE( c ) )
FT_LOCAL_DEF( void )
PS_Parser_SkipSpaces( PS_Parser parser )
{
FT_Byte* cur = parser->cursor;
FT_Byte* limit = parser->limit;
while ( cur < limit )
{
FT_Byte c = *cur;
if ( !IS_T1_SPACE( c ) )
break;
cur++;
}
parser->cursor = cur;
}
FT_LOCAL_DEF( void )
PS_Parser_SkipAlpha( PS_Parser parser )
{
FT_Byte* cur = parser->cursor;
FT_Byte* limit = parser->limit;
while ( cur < limit )
{
FT_Byte c = *cur;
if ( IS_T1_SPACE( c ) )
break;
cur++;
}
parser->cursor = cur;
}
FT_LOCAL_DEF( void )
PS_Parser_ToToken( PS_Parser parser,
T1_Token token )
{
FT_Byte* cur;
FT_Byte* limit;
FT_Byte starter, ender;
FT_Int embed;
token->type = T1_TOKEN_TYPE_NONE;
token->start = 0;
token->limit = 0;
/* first of all, skip space */
PS_Parser_SkipSpaces( parser );
cur = parser->cursor;
limit = parser->limit;
if ( cur < limit )
{
switch ( *cur )
{
/************* check for strings ***********************/
case '(':
token->type = T1_TOKEN_TYPE_STRING;
ender = ')';
goto Lookup_Ender;
/************* check for programs/array ****************/
case '{':
token->type = T1_TOKEN_TYPE_ARRAY;
ender = '}';
goto Lookup_Ender;
/************* check for table/array ******************/
case '[':
token->type = T1_TOKEN_TYPE_ARRAY;
ender = ']';
Lookup_Ender:
embed = 1;
starter = *cur++;
token->start = cur;
while ( cur < limit )
{
if ( *cur == starter )
embed++;
else if ( *cur == ender )
{
embed--;
if ( embed <= 0 )
{
token->limit = cur++;
break;
}
}
cur++;
}
break;
/* **************** otherwise, it's any token **********/
default:
token->start = cur++;
token->type = T1_TOKEN_TYPE_ANY;
while ( cur < limit && !IS_T1_SPACE( *cur ) )
cur++;
token->limit = cur;
}
if ( !token->limit )
{
token->start = 0;
token->type = T1_TOKEN_TYPE_NONE;
}
parser->cursor = cur;
}
}
FT_LOCAL_DEF( void )
PS_Parser_ToTokenArray( PS_Parser parser,
T1_Token tokens,
FT_UInt max_tokens,
FT_Int* pnum_tokens )
{
T1_TokenRec master;
*pnum_tokens = -1;
PS_Parser_ToToken( 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;
parser->cursor = master.start;
parser->limit = master.limit;
while ( parser->cursor < parser->limit )
{
T1_TokenRec token;
PS_Parser_ToToken( parser, &token );
if ( !token.type )
break;
if ( cur < limit )
*cur = token;
cur++;
}
*pnum_tokens = (FT_Int)( cur - tokens );
parser->cursor = old_cursor;
parser->limit = old_limit;
}
}
static FT_Long
t1_toint( FT_Byte** cursor,
FT_Byte* limit )
{
FT_Long result = 0;
FT_Byte* cur = *cursor;
FT_Byte c = '\0', d;
for ( ; cur < limit; cur++ )
{
c = *cur;
d = (FT_Byte)( c - '0' );
if ( d < 10 )
break;
if ( c == '-' )
{
cur++;
break;
}
}
if ( cur < limit )
{
do
{
d = (FT_Byte)( cur[0] - '0' );
if ( d >= 10 )
break;
result = result * 10 + d;
cur++;
} while ( cur < limit );
if ( c == '-' )
result = -result;
}
*cursor = cur;
return result;
}
static FT_Long
t1_tofixed( FT_Byte** cursor,
FT_Byte* limit,
FT_Long power_ten )
{
FT_Byte* cur = *cursor;
FT_Long num, divider, result;
FT_Int sign = 0;
FT_Byte d;
if ( cur >= limit )
return 0;
/* first of all, check the sign */
if ( *cur == '-' )
{
sign = 1;
cur++;
}
/* then, read the integer part, if any */
if ( *cur != '.' )
result = t1_toint( &cur, limit ) << 16;
else
result = 0;
num = 0;
divider = 1;
if ( cur >= limit )
goto Exit;
/* read decimal part, if any */
if ( *cur == '.' && cur + 1 < limit )
{
cur++;
for (;;)
{
d = (FT_Byte)( *cur - '0' );
if ( d >= 10 )
break;
if ( divider < 10000000L )
{
num = num * 10 + d;
divider *= 10;
}
cur++;
if ( cur >= limit )
break;
}
}
/* read exponent, if any */
if ( cur + 1 < limit && ( *cur == 'e' || *cur == 'E' ) )
{
cur++;
power_ten += t1_toint( &cur, limit );
}
Exit:
/* raise to power of ten if needed */
while ( power_ten > 0 )
{
result = result * 10;
num = num * 10;
power_ten--;
}
while ( power_ten < 0 )
{
result = result / 10;
divider = divider * 10;
power_ten++;
}
if ( num )
result += FT_DivFix( num, divider );
if ( sign )
result = -result;
*cursor = cur;
return result;
}
static FT_Int
t1_tocoordarray( FT_Byte** cursor,
FT_Byte* limit,
FT_Int max_coords,
FT_Short* coords )
{
FT_Byte* cur = *cursor;
FT_Int count = 0;
FT_Byte c, ender;
if ( cur >= limit )
goto Exit;
/* check for the beginning of an array; if not, only one number will */
/* be read */
c = *cur;
ender = 0;
if ( c == '[' )
ender = ']';
if ( c == '{' )
ender = '}';
if ( ender )
cur++;
/* now, read the coordinates */
for ( ; cur < limit; )
{
/* skip whitespace in front of data */
for (;;)
{
c = *cur;
if ( c != ' ' && c != '\t' )
break;
cur++;
if ( cur >= limit )
goto Exit;
}
if ( count >= max_coords || c == ender )
break;
coords[count] = (FT_Short)( t1_tofixed( &cur, limit, 0 ) >> 16 );
count++;
if ( !ender )
break;
}
Exit:
*cursor = cur;
return count;
}
static FT_Int
t1_tofixedarray( FT_Byte** cursor,
FT_Byte* limit,
FT_Int max_values,
FT_Fixed* values,
FT_Int power_ten )
{
FT_Byte* cur = *cursor;
FT_Int count = 0;
FT_Byte c, ender;
if ( cur >= limit ) goto Exit;
/* check for the beginning of an array. If not, only one number will */
/* be read */
c = *cur;
ender = 0;
if ( c == '[' )
ender = ']';
if ( c == '{' )
ender = '}';
if ( ender )
cur++;
/* now, read the values */
for ( ; cur < limit; )
{
/* skip whitespace in front of data */
for (;;)
{
c = *cur;
if ( c != ' ' && c != '\t' )
break;
cur++;
if ( cur >= limit )
goto Exit;
}
if ( count >= max_values || c == ender )
break;
values[count] = t1_tofixed( &cur, limit, power_ten );
count++;
if ( !ender )
break;
}
Exit:
*cursor = cur;
return count;
}
#if 0
static FT_String*
t1_tostring( FT_Byte** cursor,
FT_Byte* limit,
FT_Memory memory )
{
FT_Byte* cur = *cursor;
FT_Int 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 = cur - *cursor;
if ( cur >= limit || FT_ALLOC( 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
t1_tobool( FT_Byte** cursor,
FT_Byte* limit )
{
FT_Byte* cur = *cursor;
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;
}
*cursor = cur;
return result;
}
/* Load a simple field (i.e. non-table) into the current list of objects */
FT_LOCAL_DEF( FT_Error )
PS_Parser_LoadField( 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;
PS_Parser_ToToken( parser, &token );
if ( !token.type )
goto Fail;
count = 1;
idx = 0;
cur = token.start;
limit = token.limit;
if ( token.type == T1_TOKEN_TYPE_ARRAY )
{
/* if this is an array, and we have no blend, an error occurs */
if ( max_objects == 0 )
goto Fail;
count = max_objects;
idx = 1;
}
for ( ; count > 0; count--, idx++ )
{
FT_Byte* q = (FT_Byte*)objects[idx] + field->offset;
FT_Long val;
FT_String* string;
switch ( field->type )
{
case T1_FIELD_TYPE_BOOL:
val = t1_tobool( &cur, limit );
goto Store_Integer;
case T1_FIELD_TYPE_FIXED:
val = t1_tofixed( &cur, limit, 3 );
goto Store_Integer;
case T1_FIELD_TYPE_INTEGER:
val = t1_toint( &cur, limit );
Store_Integer:
switch ( field->size )
{
case 1:
*(FT_Byte*)q = (FT_Byte)val;
break;
case 2:
*(FT_UShort*)q = (FT_UShort)val;
break;
case 4:
*(FT_UInt32*)q = (FT_UInt32)val;
break;
default: /* for 64-bit systems */
*(FT_Long*)q = val;
}
break;
case T1_FIELD_TYPE_STRING:
{
FT_Memory memory = parser->memory;
FT_UInt len = (FT_UInt)( limit - cur );
if ( *(FT_String**)q )
/* with synthetic fonts, it's possible to find a field twice */
break;
if ( FT_ALLOC( string, len + 1 ) )
goto Exit;
FT_MEM_COPY( string, cur, len );
string[len] = 0;
*(FT_String**)q = string;
}
break;
default:
/* an error occured */
goto Fail;
}
}
#if 0 /* obsolete - keep for reference */
if ( pflags )
*pflags |= 1L << field->flag_bit;
#else
FT_UNUSED( pflags );
#endif
error = PSaux_Err_Ok;
Exit:
return error;
Fail:
error = PSaux_Err_Invalid_File_Format;
goto Exit;
}
#define T1_MAX_TABLE_ELEMENTS 32
FT_LOCAL_DEF( FT_Error )
PS_Parser_LoadFieldTable( 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 = 0;
FT_Byte* old_cursor;
FT_Byte* old_limit;
T1_FieldRec fieldrec = *(T1_Field)field;
#if 1
fieldrec.type = T1_FIELD_TYPE_INTEGER;
if ( field->type == T1_FIELD_TYPE_FIXED_ARRAY )
fieldrec.type = T1_FIELD_TYPE_FIXED;
#endif
PS_Parser_ToTokenArray( parser, elements, 32, &num_elements );
if ( num_elements < 0 )
goto Fail;
if ( num_elements > T1_MAX_TABLE_ELEMENTS )
num_elements = T1_MAX_TABLE_ELEMENTS;
old_cursor = parser->cursor;
old_limit = parser->limit;
/* we store the elements count */
*(FT_Byte*)( (FT_Byte*)objects[0] + field->count_offset ) =
(FT_Byte)num_elements;
/* 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;
PS_Parser_LoadField( parser, &fieldrec, objects, max_objects, 0 );
fieldrec.offset += fieldrec.size;
}
#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;
Fail:
error = PSaux_Err_Invalid_File_Format;
goto Exit;
}
FT_LOCAL_DEF( FT_Long )
PS_Parser_ToInt( PS_Parser parser )
{
return t1_toint( &parser->cursor, parser->limit );
}
FT_LOCAL_DEF( FT_Fixed )
PS_Parser_ToFixed( PS_Parser parser,
FT_Int power_ten )
{
return t1_tofixed( &parser->cursor, parser->limit, power_ten );
}
FT_LOCAL_DEF( FT_Int )
PS_Parser_ToCoordArray( PS_Parser parser,
FT_Int max_coords,
FT_Short* coords )
{
return t1_tocoordarray( &parser->cursor, parser->limit,
max_coords, coords );
}
FT_LOCAL_DEF( FT_Int )
PS_Parser_ToFixedArray( PS_Parser parser,
FT_Int max_values,
FT_Fixed* values,
FT_Int power_ten )
{
return t1_tofixedarray( &parser->cursor, parser->limit,
max_values, values, power_ten );
}
#if 0
FT_LOCAL_DEF( FT_String* )
T1_ToString( PS_Parser parser )
{
return t1_tostring( &parser->cursor, parser->limit, parser->memory );
}
FT_LOCAL_DEF( FT_Bool )
T1_ToBool( PS_Parser parser )
{
return t1_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 = 0;
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->path_begun = 0;
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;
builder->hints_funcs = 0;
if ( hinting )
builder->hints_funcs = glyph->internal->glyph_hints;
}
if ( size )
{
builder->scale_x = size->metrics.x_scale;
builder->scale_y = size->metrics.y_scale;
}
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_CheckPoints( 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;
if ( builder->shift )
{
x >>= 16;
y >>= 16;
}
point->x = x;
point->y = y;
*control = (FT_Byte)( flag ? FT_Curve_Tag_On : FT_Curve_Tag_Cubic );
builder->last = *point;
}
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 room 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;
if ( !builder->load_points )
{
outline->n_contours++;
return PSaux_Err_Ok;
}
error = FT_GlyphLoader_CheckPoints( 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 = 0;
/* test whether we are building a new contour */
if ( !builder->path_begun )
{
builder->path_begun = 1;
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;
/* XXXX: We must not include the last point in the path if it */
/* is located on the first point. */
if ( outline->n_points > 1 )
{
FT_Int first = 0;
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;
if ( outline->n_contours > 1 )
{
first = outline->contours[outline->n_contours - 2] + 1;
p1 = outline->points + first;
}
/* `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 )
outline->contours[outline->n_contours - 1] =
(short)( outline->n_points - 1 );
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** OTHER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL_DEF( void )
T1_Decrypt( FT_Byte* buffer,
FT_Offset length,
FT_UShort seed )
{
while ( length > 0 )
{
FT_Byte plain;
plain = (FT_Byte)( *buffer ^ ( seed >> 8 ) );
seed = (FT_UShort)( ( *buffer + seed ) * 52845U + 22719 );
*buffer++ = plain;
length--;
}
}
/* END */