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src/java.desktop/share/native/libfreetype/src/psaux/cffdecode.c
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@@ -1,21 +1,21 @@
-/***************************************************************************/
-/* */
-/* cffdecode.c */
-/* */
-/* PostScript CFF (Type 2) decoding routines (body). */
-/* */
-/* Copyright 2017-2018 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. */
-/* */
-/***************************************************************************/
+/****************************************************************************
+ *
+ * cffdecode.c
+ *
+ * PostScript CFF (Type 2) decoding routines (body).
+ *
+ * Copyright (C) 2017-2019 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_FREETYPE_H
#include FT_INTERNAL_DEBUG_H
@@ -26,18 +26,18 @@
#include "psobjs.h"
#include "psauxerr.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. */
- /* */
+ /**************************************************************************
+ *
+ * The macro FT_COMPONENT is used in trace mode. It is an implicit
+ * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
+ * messages during execution.
+ */
#undef FT_COMPONENT
-#define FT_COMPONENT trace_cffdecode
+#define FT_COMPONENT cffdecode
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
typedef enum CFF_Operator_
@@ -233,12 +233,12 @@
{
FT_ERROR(( "cff_operator_seac: invalid nested seac\n" ));
return FT_THROW( Syntax_Error );
}
- adx += decoder->builder.left_bearing.x;
- ady += decoder->builder.left_bearing.y;
+ adx = ADD_LONG( adx, decoder->builder.left_bearing.x );
+ ady = ADD_LONG( ady, decoder->builder.left_bearing.y );
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Incremental fonts don't necessarily have valid charsets. */
/* They use the character code, not the glyph index, in this case. */
if ( face->root.internal->incremental_interface )
@@ -376,27 +376,30 @@
/********** *********/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
- /*************************************************************************/
- /* */
- /* <Function> */
- /* cff_compute_bias */
- /* */
- /* <Description> */
- /* Computes the bias value in dependence of the number of glyph */
- /* subroutines. */
- /* */
- /* <Input> */
- /* in_charstring_type :: The `CharstringType' value of the top DICT */
- /* dictionary. */
- /* */
- /* num_subrs :: The number of glyph subroutines. */
- /* */
- /* <Return> */
- /* The bias value. */
+ /**************************************************************************
+ *
+ * @Function:
+ * cff_compute_bias
+ *
+ * @Description:
+ * Computes the bias value in dependence of the number of glyph
+ * subroutines.
+ *
+ * @Input:
+ * in_charstring_type ::
+ * The `CharstringType' value of the top DICT
+ * dictionary.
+ *
+ * num_subrs ::
+ * The number of glyph subroutines.
+ *
+ * @Return:
+ * The bias value.
+ */
static FT_Int
cff_compute_bias( FT_Int in_charstring_type,
FT_UInt num_subrs )
{
FT_Int result;
@@ -462,32 +465,36 @@
}
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
- /*************************************************************************/
- /* */
- /* <Function> */
- /* cff_decoder_parse_charstrings */
- /* */
- /* <Description> */
- /* Parses a given Type 2 charstrings program. */
- /* */
- /* <InOut> */
- /* decoder :: The current Type 1 decoder. */
- /* */
- /* <Input> */
- /* charstring_base :: The base of the charstring stream. */
- /* */
- /* charstring_len :: The length in bytes of the charstring stream. */
- /* */
- /* in_dict :: Set to 1 if function is called from top or */
- /* private DICT (needed for Multiple Master CFFs). */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
+ /**************************************************************************
+ *
+ * @Function:
+ * cff_decoder_parse_charstrings
+ *
+ * @Description:
+ * Parses a given Type 2 charstrings program.
+ *
+ * @InOut:
+ * decoder ::
+ * The current Type 1 decoder.
+ *
+ * @Input:
+ * charstring_base ::
+ * The base of the charstring stream.
+ *
+ * charstring_len ::
+ * The length in bytes of the charstring stream.
+ *
+ * in_dict ::
+ * Set to 1 if function is called from top or
+ * private DICT (needed for Multiple Master CFFs).
+ *
+ * @Return:
+ * FreeType error code. 0 means success.
+ */
FT_LOCAL_DEF( FT_Error )
cff_decoder_parse_charstrings( CFF_Decoder* decoder,
FT_Byte* charstring_base,
FT_ULong charstring_len,
FT_Bool in_dict )
@@ -541,14 +548,14 @@
{
CFF_Operator op;
FT_Byte v;
- /********************************************************************/
- /* */
- /* Decode operator or operand */
- /* */
+ /*********************************************************************
+ *
+ * Decode operator or operand
+ */
v = *ip++;
if ( v >= 32 || v == 28 )
{
FT_Int shift = 16;
FT_Int32 val;
@@ -851,10 +858,19 @@
case cff_op_flex:
case cff_op_hflex1:
case cff_op_flex1:
case cff_op_callsubr:
case cff_op_callgsubr:
+ /* deprecated opcodes */
+ case cff_op_dotsection:
+ /* invalid Type 1 opcodes */
+ case cff_op_hsbw:
+ case cff_op_closepath:
+ case cff_op_callothersubr:
+ case cff_op_seac:
+ case cff_op_sbw:
+ case cff_op_setcurrentpoint:
goto MM_Error;
default:
break;
}
@@ -946,14 +962,14 @@
case cff_op_hstem:
case cff_op_vstem:
case cff_op_hstemhm:
case cff_op_vstemhm:
/* the number of arguments is always even here */
- FT_TRACE4((
- op == cff_op_hstem ? " hstem\n" :
- ( op == cff_op_vstem ? " vstem\n" :
- ( op == cff_op_hstemhm ? " hstemhm\n" : " vstemhm\n" ) ) ));
+ FT_TRACE4(( "%s\n",
+ op == cff_op_hstem ? " hstem" :
+ ( op == cff_op_vstem ? " vstem" :
+ ( op == cff_op_hstemhm ? " hstemhm" : " vstemhm" ) ) ));
if ( hinter )
hinter->stems( hinter->hints,
( op == cff_op_hstem || op == cff_op_hstemhm ),
num_args / 2,
@@ -963,11 +979,12 @@
args = stack;
break;
case cff_op_hintmask:
case cff_op_cntrmask:
- FT_TRACE4(( op == cff_op_hintmask ? " hintmask" : " cntrmask" ));
+ FT_TRACE4(( "%s", op == cff_op_hintmask ? " hintmask"
+ : " cntrmask" ));
/* implement vstem when needed -- */
/* the specification doesn't say it, but this also works */
/* with the 'cntrmask' operator */
/* */
@@ -1076,12 +1093,12 @@
case cff_op_vlineto:
{
FT_Int phase = ( op == cff_op_hlineto );
- FT_TRACE4(( op == cff_op_hlineto ? " hlineto\n"
- : " vlineto\n" ));
+ FT_TRACE4(( "%s\n", op == cff_op_hlineto ? " hlineto"
+ : " vlineto" ));
if ( num_args < 0 )
goto Stack_Underflow;
/* there exist subsetted fonts (found in PDFs) */
@@ -1248,12 +1265,12 @@
{
FT_Int phase;
FT_Int nargs;
- FT_TRACE4(( op == cff_op_vhcurveto ? " vhcurveto\n"
- : " hvcurveto\n" ));
+ FT_TRACE4(( "%s\n", op == cff_op_vhcurveto ? " vhcurveto"
+ : " hvcurveto" ));
if ( cff_builder_start_point( builder, x, y ) )
goto Fail;
if ( num_args < 4 )
@@ -1537,23 +1554,23 @@
dy = ADD_LONG( dy, temp[1] );
temp += 2;
}
if ( dx < 0 )
- dx = -dx;
+ dx = NEG_LONG( dx );
if ( dy < 0 )
- dy = -dy;
+ dy = NEG_LONG( dy );
/* strange test, but here it is... */
horizontal = ( dx > dy );
for ( count = 5; count > 0; count-- )
{
x = ADD_LONG( x, args[0] );
y = ADD_LONG( y, args[1] );
cff_builder_add_point( builder, x, y,
- (FT_Bool)( count == 3 ) );
+ FT_BOOL( count == 3 ) );
args += 2;
}
/* is last operand an x- or y-delta? */
if ( horizontal )
@@ -1587,11 +1604,11 @@
for ( count = 6; count > 0; count-- )
{
x = ADD_LONG( x, args[0] );
y = ADD_LONG( y, args[1] );
cff_builder_add_point( builder, x, y,
- (FT_Bool)( count == 4 || count == 1 ) );
+ FT_BOOL( count == 4 || count == 1 ) );
args += 2;
}
args = stack;
}
@@ -1703,20 +1720,24 @@
args[0] = -args[0];
args++;
break;
case cff_op_random:
+ {
+ FT_UInt32* randval = in_dict ? &decoder->cff->top_font.random
+ : &decoder->current_subfont->random;
+
+
FT_TRACE4(( " random\n" ));
/* only use the lower 16 bits of `random' */
/* to generate a number in the range (0;1] */
- args[0] = (FT_Fixed)
- ( ( decoder->current_subfont->random & 0xFFFF ) + 1 );
+ args[0] = (FT_Fixed)( ( *randval & 0xFFFF ) + 1 );
args++;
- decoder->current_subfont->random =
- cff_random( decoder->current_subfont->random );
+ *randval = cff_random( *randval );
+ }
break;
case cff_op_mul:
FT_TRACE4(( " mul\n" ));
@@ -1725,11 +1746,14 @@
break;
case cff_op_sqrt:
FT_TRACE4(( " sqrt\n" ));
- if ( args[0] > 0 )
+ /* without upper limit the loop below might not finish */
+ if ( args[0] > 0x7FFFFFFFL )
+ args[0] = 46341;
+ else if ( args[0] > 0 )
{
FT_Fixed root = args[0];
FT_Fixed new_root;
@@ -1798,10 +1822,11 @@
if ( args < stack )
goto Stack_Underflow;
if ( idx >= 0 )
{
+ idx = idx % count;
while ( idx > 0 )
{
FT_Fixed tmp = args[count - 1];
FT_Int i;
@@ -1812,10 +1837,14 @@
idx--;
}
}
else
{
+ /* before C99 it is implementation-defined whether */
+ /* the result of `%' is negative if the first operand */
+ /* is negative */
+ idx = -( NEG_INT( idx ) % count );
while ( idx < 0 )
{
FT_Fixed tmp = args[0];
FT_Int i;
@@ -1912,28 +1941,32 @@
break;
case cff_op_blend:
/* this operator was removed from the Type2 specification */
/* in version 16-March-2000 */
+ if ( num_designs )
{
FT_Int num_results = (FT_Int)( args[0] >> 16 );
FT_TRACE4(( " blend\n" ));
if ( num_results < 0 )
goto Syntax_Error;
- if ( num_results * (FT_Int)num_designs > num_args )
+ if ( num_results > num_args ||
+ num_results * (FT_Int)num_designs > num_args )
goto Stack_Underflow;
/* since we currently don't handle interpolation of multiple */
/* master fonts, return the `num_results' values of the */
/* first master */
args -= num_results * ( num_designs - 1 );
num_args -= num_results * ( num_designs - 1 );
}
+ else
+ goto Syntax_Error;
break;
case cff_op_dotsection:
/* this operator is deprecated and ignored by the parser */
FT_TRACE4(( " dotsection\n" ));
@@ -1996,24 +2029,35 @@
y = ADD_LONG( decoder->builder.pos_y, args[1] );
args = stack;
break;
case cff_op_callothersubr:
+ {
+ FT_Fixed arg;
+
+
/* this is an invalid Type 2 operator; however, there */
- /* exist fonts which are incorrectly converted from probably */
- /* Type 1 to CFF, and some parsers seem to accept it */
+ /* exist fonts which are incorrectly converted from */
+ /* probably Type 1 to CFF, and some parsers seem to accept */
+ /* it */
FT_TRACE4(( " callothersubr (invalid op)\n" ));
/* subsequent `pop' operands should add the arguments, */
- /* this is the implementation described for `unknown' other */
- /* subroutines in the Type1 spec. */
+ /* this is the implementation described for `unknown' */
+ /* other subroutines in the Type1 spec. */
/* */
/* XXX Fix return arguments (see discussion below). */
- args -= 2 + ( args[-2] >> 16 );
+
+ arg = 2 + ( args[-2] >> 16 );
+ if ( arg >= CFF_MAX_OPERANDS )
+ goto Stack_Underflow;
+
+ args -= arg;
if ( args < stack )
goto Stack_Underflow;
+ }
break;
case cff_op_pop:
/* this is an invalid Type 2 operator; however, there */
/* exist fonts which are incorrectly converted from probably */
@@ -2249,32 +2293,38 @@
}
#endif /* CFF_CONFIG_OPTION_OLD_ENGINE */
- /*************************************************************************/
- /* */
- /* <Function> */
- /* cff_decoder_init */
- /* */
- /* <Description> */
- /* Initializes a given glyph decoder. */
- /* */
- /* <InOut> */
- /* decoder :: A pointer to the glyph builder to initialize. */
- /* */
- /* <Input> */
- /* face :: The current face object. */
- /* */
- /* size :: The current size object. */
- /* */
- /* slot :: The current glyph object. */
- /* */
- /* hinting :: Whether hinting is active. */
- /* */
- /* hint_mode :: The hinting mode. */
- /* */
+ /**************************************************************************
+ *
+ * @Function:
+ * cff_decoder_init
+ *
+ * @Description:
+ * Initializes a given glyph decoder.
+ *
+ * @InOut:
+ * decoder ::
+ * A pointer to the glyph builder to initialize.
+ *
+ * @Input:
+ * face ::
+ * The current face object.
+ *
+ * size ::
+ * The current size object.
+ *
+ * slot ::
+ * The current glyph object.
+ *
+ * hinting ::
+ * Whether hinting is active.
+ *
+ * hint_mode ::
+ * The hinting mode.
+ */
FT_LOCAL_DEF( void )
cff_decoder_init( CFF_Decoder* decoder,
TT_Face face,
CFF_Size size,
CFF_GlyphSlot slot,
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