#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_POSTSCRIPT_HINTS_H
#include FT_OUTLINE_H
#include "t1decode.h"
#include "psobjs.h"
#include "psauxerr.h"
#undef FT_COMPONENT
#define FT_COMPONENT trace_t1decode
typedef enum T1_Operator_
{
op_none = 0,
op_endchar,
op_hsbw,
op_seac,
op_sbw,
op_closepath,
op_hlineto,
op_hmoveto,
op_hvcurveto,
op_rlineto,
op_rmoveto,
op_rrcurveto,
op_vhcurveto,
op_vlineto,
op_vmoveto,
op_dotsection,
op_hstem,
op_hstem3,
op_vstem,
op_vstem3,
op_div,
op_callothersubr,
op_callsubr,
op_pop,
op_return,
op_setcurrentpoint,
op_max
} T1_Operator;
static
const FT_Int t1_args_count[op_max] =
{
0,
0,
2,
5,
4,
0,
1,
1,
4,
2,
2,
6,
4,
1,
1,
0,
2,
6,
2,
6,
2,
-1,
1,
0,
0,
2
};
static FT_Int
t1_lookup_glyph_by_stdcharcode( T1_Decoder decoder,
FT_Int charcode )
{
FT_UInt n;
const FT_String* glyph_name;
PSNames_Service psnames = decoder->psnames;
if ( charcode < 0 || charcode > 255 )
return -1;
glyph_name = psnames->adobe_std_strings(
psnames->adobe_std_encoding[charcode]);
for ( n = 0; n < decoder->num_glyphs; n++ )
{
FT_String* name = (FT_String*)decoder->glyph_names[n];
if ( name && name[0] == glyph_name[0] &&
ft_strcmp( name,glyph_name ) == 0 )
return n;
}
return -1;
}
static FT_Error
t1operator_seac( T1_Decoder decoder,
FT_Pos asb,
FT_Pos adx,
FT_Pos ady,
FT_Int bchar,
FT_Int achar )
{
FT_Error error;
FT_Int bchar_index, achar_index;
#if 0
FT_Int n_base_points;
FT_Outline* base = decoder->builder.base;
#endif
FT_Vector left_bearing, advance;
adx += decoder->builder.left_bearing.x;
if ( decoder->glyph_names == 0 )
{
FT_ERROR(( "t1operator_seac:" ));
FT_ERROR(( " glyph names table not available in this font!\n" ));
return PSaux_Err_Syntax_Error;
}
bchar_index = t1_lookup_glyph_by_stdcharcode( decoder, bchar );
achar_index = t1_lookup_glyph_by_stdcharcode( decoder, achar );
if ( bchar_index < 0 || achar_index < 0 )
{
FT_ERROR(( "t1operator_seac:" ));
FT_ERROR(( " invalid seac character code arguments\n" ));
return PSaux_Err_Syntax_Error;
}
if ( decoder->builder.no_recurse )
{
FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph;
FT_GlyphLoader loader = glyph->internal->loader;
FT_SubGlyph subg;
error = FT_GlyphLoader_CheckSubGlyphs( loader, 2 );
if ( error )
goto Exit;
subg = loader->current.subglyphs;
subg->index = bchar_index;
subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES |
FT_SUBGLYPH_FLAG_USE_MY_METRICS;
subg->arg1 = 0;
subg->arg2 = 0;
subg++;
subg->index = achar_index;
subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES;
subg->arg1 = adx - asb;
subg->arg2 = ady;
glyph->num_subglyphs = 2;
glyph->subglyphs = loader->base.subglyphs;
glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
loader->current.num_subglyphs = 2;
goto Exit;
}
FT_GlyphLoader_Prepare( decoder->builder.loader );
error = t1_decoder_parse_glyph( decoder, bchar_index );
if ( error )
goto Exit;
#if 0
n_base_points = base->n_points;
#endif
left_bearing = decoder->builder.left_bearing;
advance = decoder->builder.advance;
decoder->builder.left_bearing.x = 0;
decoder->builder.left_bearing.y = 0;
decoder->builder.pos_x = adx - asb;
decoder->builder.pos_y = ady;
error = t1_decoder_parse_glyph( decoder, achar_index );
if ( error )
goto Exit;
decoder->builder.left_bearing = left_bearing;
decoder->builder.advance = advance;
#if 0
if ( decoder->builder.load_points )
{
FT_Outline dummy;
dummy.n_points = (short)( base->n_points - n_base_points );
dummy.points = base->points + n_base_points;
FT_Outline_Translate( &dummy, adx - asb, ady );
}
#else
decoder->builder.pos_x = 0;
decoder->builder.pos_y = 0;
#endif
Exit:
return error;
}
FT_LOCAL_DEF( FT_Error )
t1_decoder_parse_charstrings( T1_Decoder decoder,
FT_Byte* charstring_base,
FT_UInt charstring_len )
{
FT_Error error;
T1_Decoder_Zone zone;
FT_Byte* ip;
FT_Byte* limit;
T1_Builder builder = &decoder->builder;
FT_Pos x, y, orig_x, orig_y;
T1_Hints_Funcs hinter;
#define start_point t1_builder_start_point
#define check_points t1_builder_check_points
#define add_point t1_builder_add_point
#define add_point1 t1_builder_add_point1
#define add_contour t1_builder_add_contour
#define close_contour t1_builder_close_contour
decoder->top = decoder->stack;
decoder->zone = decoder->zones;
zone = decoder->zones;
builder->path_begun = 0;
hinter = (T1_Hints_Funcs)builder->hints_funcs;
zone->base = charstring_base;
limit = zone->limit = charstring_base + charstring_len;
ip = zone->cursor = zone->base;
error = PSaux_Err_Ok;
x = orig_x = builder->pos_x;
y = orig_y = builder->pos_y;
if ( hinter )
hinter->open( hinter->hints );
while ( ip < limit )
{
FT_Long* top = decoder->top;
T1_Operator op = op_none;
FT_Long value = 0;
switch ( *ip++ )
{
case 1:
op = op_hstem;
break;
case 3:
op = op_vstem;
break;
case 4:
op = op_vmoveto;
break;
case 5:
op = op_rlineto;
break;
case 6:
op = op_hlineto;
break;
case 7:
op = op_vlineto;
break;
case 8:
op = op_rrcurveto;
break;
case 9:
op = op_closepath;
break;
case 10:
op = op_callsubr;
break;
case 11:
op = op_return;
break;
case 13:
op = op_hsbw;
break;
case 14:
op = op_endchar;
break;
case 15:
op = op_none;
break;
case 21:
op = op_rmoveto;
break;
case 22:
op = op_hmoveto;
break;
case 30:
op = op_vhcurveto;
break;
case 31:
op = op_hvcurveto;
break;
case 12:
if ( ip > limit )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invalid escape (12+EOF)\n" ));
goto Syntax_Error;
}
switch ( *ip++ )
{
case 0:
op = op_dotsection;
break;
case 1:
op = op_vstem3;
break;
case 2:
op = op_hstem3;
break;
case 6:
op = op_seac;
break;
case 7:
op = op_sbw;
break;
case 12:
op = op_div;
break;
case 16:
op = op_callothersubr;
break;
case 17:
op = op_pop;
break;
case 33:
op = op_setcurrentpoint;
break;
default:
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invalid escape (12+%d)\n",
ip[-1] ));
goto Syntax_Error;
}
break;
case 255:
if ( ip + 4 > limit )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"unexpected EOF in integer\n" ));
goto Syntax_Error;
}
value = (FT_Int32)( ((FT_Long)ip[0] << 24) |
((FT_Long)ip[1] << 16) |
((FT_Long)ip[2] << 8 ) |
ip[3] );
ip += 4;
break;
default:
if ( ip[-1] >= 32 )
{
if ( ip[-1] < 247 )
value = (FT_Long)ip[-1] - 139;
else
{
if ( ++ip > limit )
{
FT_ERROR(( "t1_decoder_parse_charstrings: " ));
FT_ERROR(( "unexpected EOF in integer\n" ));
goto Syntax_Error;
}
if ( ip[-2] < 251 )
value = ( ( (FT_Long)ip[-2] - 247 ) << 8 ) + ip[-1] + 108;
else
value = -( ( ( (FT_Long)ip[-2] - 251 ) << 8 ) + ip[-1] + 108 );
}
}
else
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invalid byte (%d)\n", ip[-1] ));
goto Syntax_Error;
}
}
if ( op == op_none )
{
if ( top - decoder->stack >= T1_MAX_CHARSTRINGS_OPERANDS )
{
FT_ERROR(( "t1_decoder_parse_charstrings: stack overflow!\n" ));
goto Syntax_Error;
}
FT_TRACE4(( " %ld", value ));
*top++ = value;
decoder->top = top;
}
else if ( op == op_callothersubr )
{
FT_TRACE4(( " callothersubr" ));
if ( top - decoder->stack < 2 )
goto Stack_Underflow;
top -= 2;
switch ( top[1] )
{
case 1:
if ( top[0] != 0 )
goto Unexpected_OtherSubr;
decoder->flex_state = 1;
decoder->num_flex_vectors = 0;
if ( start_point( builder, x, y ) ||
check_points( builder, 6 ) )
goto Memory_Error;
break;
case 2:
{
FT_Int idx;
if ( top[0] != 0 )
goto Unexpected_OtherSubr;
idx = decoder->num_flex_vectors++;
if ( idx > 0 && idx < 7 )
add_point( builder,
x,
y,
(FT_Byte)( idx == 3 || idx == 6 ) );
}
break;
case 0:
if ( top[0] != 3 )
goto Unexpected_OtherSubr;
if ( decoder->flex_state == 0 ||
decoder->num_flex_vectors != 7 )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"unexpected flex end\n" ));
goto Syntax_Error;
}
if ( ip + 6 > limit ||
ip[0] != 12 || ip[1] != 17 ||
ip[2] != 12 || ip[3] != 17 ||
ip[4] != 12 || ip[5] != 33 )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invalid flex charstring\n" ));
goto Syntax_Error;
}
ip += 6;
decoder->flex_state = 0;
break;
case 3:
if ( top[0] != 1 )
goto Unexpected_OtherSubr;
if ( ip + 2 > limit )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invalid escape (12+%d)\n", ip[-1] ));
goto Syntax_Error;
}
if ( ip[0] != 12 || ip[1] != 17 )
{
FT_ERROR(( "t1_decoder_parse_charstrings: " ));
FT_ERROR(( "`pop' expected, found (%d %d)\n", ip[0], ip[1] ));
goto Syntax_Error;
}
ip += 2;
if ( hinter )
hinter->reset( hinter->hints, builder->current->n_points );
break;
case 12:
case 13:
top = decoder->stack;
break;
case 14:
case 15:
case 16:
case 17:
case 18:
{
PS_Blend blend = decoder->blend;
FT_UInt num_points, nn, mm;
FT_Long* delta;
FT_Long* values;
if ( !blend )
{
FT_ERROR(( "t1_decoder_parse_charstrings: " ));
FT_ERROR(( "unexpected multiple masters operator!\n" ));
goto Syntax_Error;
}
num_points = (FT_UInt)top[1] - 13 + ( top[1] == 18 );
if ( top[0] != (FT_Int)( num_points * blend->num_designs ) )
{
FT_ERROR(( "t1_decoder_parse_charstrings: " ));
FT_ERROR(( "incorrect number of mm arguments\n" ));
goto Syntax_Error;
}
top -= blend->num_designs * num_points;
if ( top < decoder->stack )
goto Stack_Underflow;
delta = top + num_points;
values = top;
for ( nn = 0; nn < num_points; nn++ )
{
FT_Int tmp = values[0];
for ( mm = 1; mm < blend->num_designs; mm++ )
tmp += FT_MulFix( *delta++, blend->weight_vector[mm] );
*values++ = tmp;
}
break;
}
default:
Unexpected_OtherSubr:
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invalid othersubr [%d %d]!\n", top[0], top[1] ));
goto Syntax_Error;
}
decoder->top = top;
}
else
{
FT_Int num_args = t1_args_count[op];
if ( top - decoder->stack < num_args )
goto Stack_Underflow;
top -= num_args;
switch ( op )
{
case op_endchar:
FT_TRACE4(( " endchar" ));
close_contour( builder );
if ( hinter )
{
if (hinter->close( hinter->hints, builder->current->n_points ))
goto Syntax_Error;
hinter->apply( hinter->hints,
builder->current,
(PSH_Globals) builder->hints_globals,
decoder->hint_mode );
}
FT_GlyphLoader_Add( builder->loader );
FT_TRACE4(( "\n\n" ));
return PSaux_Err_Ok;
case op_hsbw:
FT_TRACE4(( " hsbw" ));
builder->left_bearing.x += top[0];
builder->advance.x = top[1];
builder->advance.y = 0;
orig_x = builder->last.x = x = builder->pos_x + top[0];
orig_y = builder->last.y = y = builder->pos_y;
FT_UNUSED( orig_y );
if ( builder->metrics_only )
return PSaux_Err_Ok;
break;
case op_seac:
return t1operator_seac( decoder, top[0], top[1],
top[2], top[3], top[4] );
case op_sbw:
FT_TRACE4(( " sbw" ));
builder->left_bearing.x += top[0];
builder->left_bearing.y += top[1];
builder->advance.x = top[2];
builder->advance.y = top[3];
builder->last.x = x = builder->pos_x + top[0];
builder->last.y = y = builder->pos_y + top[1];
if ( builder->metrics_only )
return PSaux_Err_Ok;
break;
case op_closepath:
FT_TRACE4(( " closepath" ));
close_contour( builder );
builder->path_begun = 0;
break;
case op_hlineto:
FT_TRACE4(( " hlineto" ));
if ( start_point( builder, x, y ) )
goto Memory_Error;
x += top[0];
goto Add_Line;
case op_hmoveto:
FT_TRACE4(( " hmoveto" ));
x += top[0];
if ( !decoder->flex_state )
builder->path_begun = 0;
break;
case op_hvcurveto:
FT_TRACE4(( " hvcurveto" ));
if ( start_point( builder, x, y ) ||
check_points( builder, 3 ) )
goto Memory_Error;
x += top[0];
add_point( builder, x, y, 0 );
x += top[1];
y += top[2];
add_point( builder, x, y, 0 );
y += top[3];
add_point( builder, x, y, 1 );
break;
case op_rlineto:
FT_TRACE4(( " rlineto" ));
if ( start_point( builder, x, y ) )
goto Memory_Error;
x += top[0];
y += top[1];
Add_Line:
if ( add_point1( builder, x, y ) )
goto Memory_Error;
break;
case op_rmoveto:
FT_TRACE4(( " rmoveto" ));
x += top[0];
y += top[1];
if ( !decoder->flex_state )
builder->path_begun = 0;
break;
case op_rrcurveto:
FT_TRACE4(( " rcurveto" ));
if ( start_point( builder, x, y ) ||
check_points( builder, 3 ) )
goto Memory_Error;
x += top[0];
y += top[1];
add_point( builder, x, y, 0 );
x += top[2];
y += top[3];
add_point( builder, x, y, 0 );
x += top[4];
y += top[5];
add_point( builder, x, y, 1 );
break;
case op_vhcurveto:
FT_TRACE4(( " vhcurveto" ));
if ( start_point( builder, x, y ) ||
check_points( builder, 3 ) )
goto Memory_Error;
y += top[0];
add_point( builder, x, y, 0 );
x += top[1];
y += top[2];
add_point( builder, x, y, 0 );
x += top[3];
add_point( builder, x, y, 1 );
break;
case op_vlineto:
FT_TRACE4(( " vlineto" ));
if ( start_point( builder, x, y ) )
goto Memory_Error;
y += top[0];
goto Add_Line;
case op_vmoveto:
FT_TRACE4(( " vmoveto" ));
y += top[0];
if ( !decoder->flex_state )
builder->path_begun = 0;
break;
case op_div:
FT_TRACE4(( " div" ));
if ( top[1] )
{
*top = top[0] / top[1];
++top;
}
else
{
FT_ERROR(( "t1_decoder_parse_charstrings: division by 0\n" ));
goto Syntax_Error;
}
break;
case op_callsubr:
{
FT_Int idx;
FT_TRACE4(( " callsubr" ));
idx = top[0];
if ( idx < 0 || idx >= (FT_Int)decoder->num_subrs )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invalid subrs index\n" ));
goto Syntax_Error;
}
if ( zone - decoder->zones >= T1_MAX_SUBRS_CALLS )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"too many nested subrs\n" ));
goto Syntax_Error;
}
zone->cursor = ip;
zone++;
zone->base = decoder->subrs[idx];
if ( decoder->subrs_len )
zone->limit = zone->base + decoder->subrs_len[idx];
else
{
zone->base += ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );
zone->limit = decoder->subrs[idx + 1];
}
zone->cursor = zone->base;
if ( !zone->base )
{
FT_ERROR(( "t1_decoder_parse_charstrings: "
"invoking empty subrs!\n" ));
goto Syntax_Error;
}
decoder->zone = zone;
ip = zone->base;
limit = zone->limit;
break;
}
case op_pop:
FT_TRACE4(( " pop" ));
top++;
break;
case op_return:
FT_TRACE4(( " return" ));
if ( zone <= decoder->zones )
{
FT_ERROR(( "t1_decoder_parse_charstrings: unexpected return\n" ));
goto Syntax_Error;
}
zone--;
ip = zone->cursor;
limit = zone->limit;
decoder->zone = zone;
break;
case op_dotsection:
FT_TRACE4(( " dotsection" ));
break;
case op_hstem:
FT_TRACE4(( " hstem" ));
if ( hinter )
{
hinter->stem( hinter->hints, 1, top );
}
break;
case op_hstem3:
FT_TRACE4(( " hstem3" ));
if ( hinter )
hinter->stem3( hinter->hints, 1, top );
break;
case op_vstem:
FT_TRACE4(( " vstem" ));
if ( hinter )
{
top[0] += orig_x;
hinter->stem( hinter->hints, 0, top );
}
break;
case op_vstem3:
FT_TRACE4(( " vstem3" ));
if ( hinter )
{
FT_Pos dx = orig_x;
top[0] += dx;
top[2] += dx;
top[4] += dx;
hinter->stem3( hinter->hints, 0, top );
}
break;
case op_setcurrentpoint:
FT_TRACE4(( " setcurrentpoint" ));
FT_ERROR(( "t1_decoder_parse_charstrings: " ));
FT_ERROR(( "unexpected `setcurrentpoint'\n" ));
goto Syntax_Error;
default:
FT_ERROR(( "t1_decoder_parse_charstrings: "
"unhandled opcode %d\n", op ));
goto Syntax_Error;
}
decoder->top = top;
}
}
FT_TRACE4(( "..end..\n\n" ));
return error;
Syntax_Error:
return PSaux_Err_Syntax_Error;
Stack_Underflow:
return PSaux_Err_Stack_Underflow;
Memory_Error:
return builder->error;
}
FT_LOCAL_DEF( FT_Error )
t1_decoder_parse_glyph( T1_Decoder decoder,
FT_UInt glyph )
{
return decoder->parse_callback( decoder, glyph );
}
FT_LOCAL_DEF( FT_Error )
t1_decoder_init( T1_Decoder decoder,
FT_Face face,
FT_Size size,
FT_GlyphSlot slot,
FT_Byte** glyph_names,
PS_Blend blend,
FT_Bool hinting,
FT_Render_Mode hint_mode,
T1_Decoder_Callback parse_callback )
{
FT_MEM_ZERO( decoder, sizeof ( *decoder ) );
{
PSNames_Service psnames = 0;
psnames = (PSNames_Service)FT_Get_Module_Interface(
FT_FACE_LIBRARY(face), "psnames" );
if ( !psnames )
{
FT_ERROR(( "t1_decoder_init: " ));
FT_ERROR(( "the `psnames' module is not available\n" ));
return PSaux_Err_Unimplemented_Feature;
}
decoder->psnames = psnames;
}
t1_builder_init( &decoder->builder, face, size, slot, hinting );
decoder->num_glyphs = (FT_UInt)face->num_glyphs;
decoder->glyph_names = glyph_names;
decoder->hint_flags = face->internal->hint_flags;
decoder->hint_mode = hint_mode;
decoder->blend = blend;
decoder->parse_callback = parse_callback;
decoder->funcs = t1_decoder_funcs;
return 0;
}
FT_LOCAL_DEF( void )
t1_decoder_done( T1_Decoder decoder )
{
t1_builder_done( &decoder->builder );
}