summaryrefslogtreecommitdiffstats
path: root/src/3rdparty/freetype/src/psaux/cffdecode.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/3rdparty/freetype/src/psaux/cffdecode.c')
-rw-r--r--src/3rdparty/freetype/src/psaux/cffdecode.c300
1 files changed, 175 insertions, 125 deletions
diff --git a/src/3rdparty/freetype/src/psaux/cffdecode.c b/src/3rdparty/freetype/src/psaux/cffdecode.c
index 80d622c0e1..17cccf818b 100644
--- a/src/3rdparty/freetype/src/psaux/cffdecode.c
+++ b/src/3rdparty/freetype/src/psaux/cffdecode.c
@@ -1,19 +1,19 @@
-/***************************************************************************/
-/* */
-/* 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>
@@ -28,14 +28,14 @@
#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
@@ -235,8 +235,8 @@
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. */
@@ -378,23 +378,26 @@
/*************************************************************************/
/*************************************************************************/
- /*************************************************************************/
- /* */
- /* <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 )
@@ -464,28 +467,32 @@
#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,
@@ -543,10 +550,10 @@
FT_Byte v;
- /********************************************************************/
- /* */
- /* Decode operator or operand */
- /* */
+ /*********************************************************************
+ *
+ * Decode operator or operand
+ */
v = *ip++;
if ( v >= 32 || v == 28 )
{
@@ -853,6 +860,15 @@
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:
@@ -948,10 +964,10 @@
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,
@@ -965,7 +981,8 @@
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 */
@@ -1078,8 +1095,8 @@
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;
@@ -1250,8 +1267,8 @@
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;
@@ -1539,9 +1556,9 @@
}
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 );
@@ -1551,7 +1568,7 @@
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;
}
@@ -1589,7 +1606,7 @@
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;
}
@@ -1705,16 +1722,20 @@
break;
case cff_op_random:
- FT_TRACE4(( " random\n" ));
+ {
+ FT_UInt32* randval = in_dict ? &decoder->cff->top_font.random
+ : &decoder->current_subfont->random;
- /* 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++;
- decoder->current_subfont->random =
- cff_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)( ( *randval & 0xFFFF ) + 1 );
+ args++;
+
+ *randval = cff_random( *randval );
+ }
break;
case cff_op_mul:
@@ -1727,7 +1748,10 @@
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;
@@ -1800,6 +1824,7 @@
if ( idx >= 0 )
{
+ idx = idx % count;
while ( idx > 0 )
{
FT_Fixed tmp = args[count - 1];
@@ -1814,6 +1839,10 @@
}
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];
@@ -1914,6 +1943,7 @@
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 );
@@ -1923,7 +1953,8 @@
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 */
@@ -1932,6 +1963,8 @@
args -= num_results * ( num_designs - 1 );
num_args -= num_results * ( num_designs - 1 );
}
+ else
+ goto Syntax_Error;
break;
case cff_op_dotsection:
@@ -1998,20 +2031,31 @@
break;
case cff_op_callothersubr:
- /* 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 */
+ {
+ FT_Fixed arg;
- 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. */
- /* */
- /* XXX Fix return arguments (see discussion below). */
- args -= 2 + ( args[-2] >> 16 );
- if ( args < stack )
- goto Stack_Underflow;
+ /* 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 */
+
+ 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. */
+ /* */
+ /* XXX Fix return arguments (see discussion below). */
+
+ 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:
@@ -2251,28 +2295,34 @@
#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,
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 03:45:38 +0000