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harfbuzz/src/hb-ot-cff1-table.hh

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/*
* Copyright © 2018 Adobe Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Adobe Author(s): Michiharu Ariza
*/
#ifndef HB_OT_CFF1_TABLE_HH
#define HB_OT_CFF1_TABLE_HH
#include "hb-ot-head-table.hh"
#include "hb-ot-cff-common.hh"
#include "hb-subset-cff1.hh"
#define HB_STRING_ARRAY_NAME cff1_std_strings
#define HB_STRING_ARRAY_LIST "hb-ot-cff1-std-str.hh"
#include "hb-string-array.hh"
#undef HB_STRING_ARRAY_LIST
#undef HB_STRING_ARRAY_NAME
namespace CFF {
/*
* CFF -- Compact Font Format (CFF)
* http://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5176.CFF.pdf
*/
#define HB_OT_TAG_cff1 HB_TAG('C','F','F',' ')
#define CFF_UNDEF_SID CFF_UNDEF_CODE
enum EncodingID { StandardEncoding = 0, ExpertEncoding = 1 };
enum CharsetID { ISOAdobeCharset = 0, ExpertCharset = 1, ExpertSubsetCharset = 2 };
typedef CFFIndex<HBUINT16> CFF1Index;
template <typename Type> struct CFF1IndexOf : CFFIndexOf<HBUINT16, Type> {};
typedef CFFIndex<HBUINT16> CFF1Index;
typedef CFF1Index CFF1CharStrings;
typedef FDArray<HBUINT16> CFF1FDArray;
typedef Subrs<HBUINT16> CFF1Subrs;
struct CFF1FDSelect : FDSelect {};
/* Encoding */
struct Encoding0 {
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (codes.sanitize (c));
}
hb_codepoint_t get_code (hb_codepoint_t glyph) const
{
assert (glyph > 0);
glyph--;
if (glyph < nCodes ())
{
return (hb_codepoint_t)codes[glyph];
}
else
return CFF_UNDEF_CODE;
}
HBUINT8 &nCodes () { return codes.len; }
HBUINT8 nCodes () const { return codes.len; }
ArrayOf<HBUINT8, HBUINT8> codes;
DEFINE_SIZE_ARRAY_SIZED (1, codes);
};
struct Encoding1_Range {
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT8 first;
HBUINT8 nLeft;
DEFINE_SIZE_STATIC (2);
};
struct Encoding1 {
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (ranges.sanitize (c));
}
hb_codepoint_t get_code (hb_codepoint_t glyph) const
{
assert (glyph > 0);
glyph--;
for (unsigned int i = 0; i < nRanges (); i++)
{
if (glyph <= ranges[i].nLeft)
{
hb_codepoint_t code = (hb_codepoint_t) ranges[i].first + glyph;
return (likely (code < 0x100) ? code: CFF_UNDEF_CODE);
}
glyph -= (ranges[i].nLeft + 1);
}
return CFF_UNDEF_CODE;
}
HBUINT8 &nRanges () { return ranges.len; }
HBUINT8 nRanges () const { return ranges.len; }
ArrayOf<Encoding1_Range, HBUINT8> ranges;
DEFINE_SIZE_ARRAY_SIZED (1, ranges);
};
struct SuppEncoding {
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT8 code;
HBUINT16 glyph;
DEFINE_SIZE_STATIC (3);
};
struct CFF1SuppEncData {
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (supps.sanitize (c));
}
void get_codes (hb_codepoint_t sid, hb_vector_t<hb_codepoint_t> &codes) const
{
for (unsigned int i = 0; i < nSups (); i++)
if (sid == supps[i].glyph)
codes.push (supps[i].code);
}
HBUINT8 &nSups () { return supps.len; }
HBUINT8 nSups () const { return supps.len; }
ArrayOf<SuppEncoding, HBUINT8> supps;
DEFINE_SIZE_ARRAY_SIZED (1, supps);
};
struct Encoding
{
/* serialize a fullset Encoding */
bool serialize (hb_serialize_context_t *c, const Encoding &src)
{
TRACE_SERIALIZE (this);
unsigned int size = src.get_size ();
Encoding *dest = c->allocate_size<Encoding> (size);
if (unlikely (dest == nullptr)) return_trace (false);
memcpy (dest, &src, size);
return_trace (true);
}
/* serialize a subset Encoding */
bool serialize (hb_serialize_context_t *c,
uint8_t format,
unsigned int enc_count,
const hb_vector_t<code_pair_t>& code_ranges,
const hb_vector_t<code_pair_t>& supp_codes)
{
TRACE_SERIALIZE (this);
Encoding *dest = c->extend_min (*this);
if (unlikely (dest == nullptr)) return_trace (false);
dest->format = format | ((supp_codes.length > 0) ? 0x80 : 0);
switch (format) {
case 0:
{
Encoding0 *fmt0 = c->allocate_size<Encoding0> (Encoding0::min_size + HBUINT8::static_size * enc_count);
if (unlikely (fmt0 == nullptr)) return_trace (false);
fmt0->nCodes () = enc_count;
unsigned int glyph = 0;
for (unsigned int i = 0; i < code_ranges.length; i++)
{
hb_codepoint_t code = code_ranges[i].code;
for (int left = (int)code_ranges[i].glyph; left >= 0; left--)
fmt0->codes[glyph++] = code++;
if (unlikely (!((glyph <= 0x100) && (code <= 0x100))))
return_trace (false);
}
}
break;
case 1:
{
Encoding1 *fmt1 = c->allocate_size<Encoding1> (Encoding1::min_size + Encoding1_Range::static_size * code_ranges.length);
if (unlikely (fmt1 == nullptr)) return_trace (false);
fmt1->nRanges () = code_ranges.length;
for (unsigned int i = 0; i < code_ranges.length; i++)
{
if (unlikely (!((code_ranges[i].code <= 0xFF) && (code_ranges[i].glyph <= 0xFF))))
return_trace (false);
fmt1->ranges[i].first = code_ranges[i].code;
fmt1->ranges[i].nLeft = code_ranges[i].glyph;
}
}
break;
}
if (supp_codes.length)
{
CFF1SuppEncData *suppData = c->allocate_size<CFF1SuppEncData> (CFF1SuppEncData::min_size + SuppEncoding::static_size * supp_codes.length);
if (unlikely (suppData == nullptr)) return_trace (false);
suppData->nSups () = supp_codes.length;
for (unsigned int i = 0; i < supp_codes.length; i++)
{
suppData->supps[i].code = supp_codes[i].code;
suppData->supps[i].glyph = supp_codes[i].glyph; /* actually SID */
}
}
return_trace (true);
}
/* parallel to above: calculate the size of a subset Encoding */
static unsigned int calculate_serialized_size (uint8_t format,
unsigned int enc_count,
unsigned int supp_count)
{
unsigned int size = min_size;
switch (format)
{
case 0: size += Encoding0::min_size + HBUINT8::static_size * enc_count; break;
case 1: size += Encoding1::min_size + Encoding1_Range::static_size * enc_count; break;
default:return 0;
}
if (supp_count > 0)
size += CFF1SuppEncData::min_size + SuppEncoding::static_size * supp_count;
return size;
}
unsigned int get_size () const
{
unsigned int size = min_size;
switch (table_format ())
{
case 0: size += u.format0.get_size (); break;
case 1: size += u.format1.get_size (); break;
}
if (has_supplement ())
size += suppEncData ().get_size ();
return size;
}
hb_codepoint_t get_code (hb_codepoint_t glyph) const
{
switch (table_format ())
{
case 0: return u.format0.get_code (glyph);
case 1: return u.format1.get_code (glyph);
default:return 0;
}
}
uint8_t table_format () const { return format & 0x7F; }
bool has_supplement () const { return format & 0x80; }
void get_supplement_codes (hb_codepoint_t sid, hb_vector_t<hb_codepoint_t> &codes) const
{
codes.resize (0);
if (has_supplement ())
suppEncData().get_codes (sid, codes);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (unlikely (!c->check_struct (this)))
return_trace (false);
switch (table_format ())
{
case 0: if (unlikely (!u.format0.sanitize (c))) { return_trace (false); } break;
case 1: if (unlikely (!u.format1.sanitize (c))) { return_trace (false); } break;
default:return_trace (false);
}
return_trace (likely (!has_supplement () || suppEncData ().sanitize (c)));
}
protected:
const CFF1SuppEncData &suppEncData () const
{
switch (table_format ())
{
case 0: return StructAfter<CFF1SuppEncData> (u.format0.codes[u.format0.nCodes ()-1]);
case 1: return StructAfter<CFF1SuppEncData> (u.format1.ranges[u.format1.nRanges ()-1]);
default:return Null (CFF1SuppEncData);
}
}
public:
HBUINT8 format;
union {
Encoding0 format0;
Encoding1 format1;
} u;
/* CFF1SuppEncData suppEncData; */
DEFINE_SIZE_MIN (1);
};
/* Charset */
struct Charset0 {
bool sanitize (hb_sanitize_context_t *c, unsigned int num_glyphs) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && sids[num_glyphs - 1].sanitize (c));
}
hb_codepoint_t get_sid (hb_codepoint_t glyph) const
{
if (glyph == 0)
return 0;
else
return sids[glyph - 1];
}
hb_codepoint_t get_glyph (hb_codepoint_t sid, unsigned int num_glyphs) const
{
if (sid == 0)
return 0;
for (unsigned int glyph = 1; glyph < num_glyphs; glyph++)
{
if (sids[glyph-1] == sid)
return glyph;
}
return 0;
}
unsigned int get_size (unsigned int num_glyphs) const
{
assert (num_glyphs > 0);
return HBUINT16::static_size * (num_glyphs - 1);
}
HBUINT16 sids[HB_VAR_ARRAY];
DEFINE_SIZE_ARRAY(0, sids);
};
template <typename TYPE>
struct Charset_Range {
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT16 first;
TYPE nLeft;
DEFINE_SIZE_STATIC (HBUINT16::static_size + TYPE::static_size);
};
template <typename TYPE>
struct Charset1_2 {
bool sanitize (hb_sanitize_context_t *c, unsigned int num_glyphs) const
{
TRACE_SANITIZE (this);
if (unlikely (!c->check_struct (this)))
return_trace (false);
num_glyphs--;
for (unsigned int i = 0; num_glyphs > 0; i++)
{
if (unlikely (!ranges[i].sanitize (c) || (num_glyphs < ranges[i].nLeft + 1)))
return_trace (false);
num_glyphs -= (ranges[i].nLeft + 1);
}
return_trace (true);
}
hb_codepoint_t get_sid (hb_codepoint_t glyph) const
{
if (glyph == 0) return 0;
glyph--;
for (unsigned int i = 0;; i++)
{
if (glyph <= ranges[i].nLeft)
return (hb_codepoint_t)ranges[i].first + glyph;
glyph -= (ranges[i].nLeft + 1);
}
return 0;
}
hb_codepoint_t get_glyph (hb_codepoint_t sid, unsigned int num_glyphs) const
{
if (sid == 0) return 0;
hb_codepoint_t glyph = 1;
for (unsigned int i = 0;; i++)
{
if (glyph >= num_glyphs)
return 0;
if ((ranges[i].first <= sid) && (sid <= ranges[i].first + ranges[i].nLeft))
return glyph + (sid - ranges[i].first);
glyph += (ranges[i].nLeft + 1);
}
return 0;
}
unsigned int get_size (unsigned int num_glyphs) const
{
unsigned int size = HBUINT8::static_size;
int glyph = (int)num_glyphs;
assert (glyph > 0);
glyph--;
for (unsigned int i = 0; glyph > 0; i++)
{
glyph -= (ranges[i].nLeft + 1);
size += Charset_Range<TYPE>::static_size;
}
return size;
}
Charset_Range<TYPE> ranges[HB_VAR_ARRAY];
DEFINE_SIZE_ARRAY (0, ranges);
};
typedef Charset1_2<HBUINT8> Charset1;
typedef Charset1_2<HBUINT16> Charset2;
typedef Charset_Range<HBUINT8> Charset1_Range;
typedef Charset_Range<HBUINT16> Charset2_Range;
struct Charset
{
/* serialize a fullset Charset */
bool serialize (hb_serialize_context_t *c, const Charset &src, unsigned int num_glyphs)
{
TRACE_SERIALIZE (this);
unsigned int size = src.get_size (num_glyphs);
Charset *dest = c->allocate_size<Charset> (size);
if (unlikely (dest == nullptr)) return_trace (false);
memcpy (dest, &src, size);
return_trace (true);
}
/* serialize a subset Charset */
bool serialize (hb_serialize_context_t *c,
uint8_t format,
unsigned int num_glyphs,
const hb_vector_t<code_pair_t>& sid_ranges)
{
TRACE_SERIALIZE (this);
Charset *dest = c->extend_min (*this);
if (unlikely (dest == nullptr)) return_trace (false);
dest->format = format;
switch (format)
{
case 0:
{
Charset0 *fmt0 = c->allocate_size<Charset0> (Charset0::min_size + HBUINT16::static_size * (num_glyphs - 1));
if (unlikely (fmt0 == nullptr)) return_trace (false);
unsigned int glyph = 0;
for (unsigned int i = 0; i < sid_ranges.length; i++)
{
hb_codepoint_t sid = sid_ranges[i].code;
for (int left = (int)sid_ranges[i].glyph; left >= 0; left--)
fmt0->sids[glyph++] = sid++;
}
}
break;
case 1:
{
Charset1 *fmt1 = c->allocate_size<Charset1> (Charset1::min_size + Charset1_Range::static_size * sid_ranges.length);
if (unlikely (fmt1 == nullptr)) return_trace (false);
for (unsigned int i = 0; i < sid_ranges.length; i++)
{
if (unlikely (!(sid_ranges[i].glyph <= 0xFF)))
return_trace (false);
fmt1->ranges[i].first = sid_ranges[i].code;
fmt1->ranges[i].nLeft = sid_ranges[i].glyph;
}
}
break;
case 2:
{
Charset2 *fmt2 = c->allocate_size<Charset2> (Charset2::min_size + Charset2_Range::static_size * sid_ranges.length);
if (unlikely (fmt2 == nullptr)) return_trace (false);
for (unsigned int i = 0; i < sid_ranges.length; i++)
{
if (unlikely (!(sid_ranges[i].glyph <= 0xFFFF)))
return_trace (false);
fmt2->ranges[i].first = sid_ranges[i].code;
fmt2->ranges[i].nLeft = sid_ranges[i].glyph;
}
}
break;
}
return_trace (true);
}
/* parallel to above: calculate the size of a subset Charset */
static unsigned int calculate_serialized_size (uint8_t format,
unsigned int count)
{
switch (format)
{
case 0: return min_size + Charset0::min_size + HBUINT16::static_size * (count - 1);
case 1: return min_size + Charset1::min_size + Charset1_Range::static_size * count;
case 2: return min_size + Charset2::min_size + Charset2_Range::static_size * count;
default:return 0;
}
}
unsigned int get_size (unsigned int num_glyphs) const
{
switch (format)
{
case 0: return min_size + u.format0.get_size (num_glyphs);
case 1: return min_size + u.format1.get_size (num_glyphs);
case 2: return min_size + u.format2.get_size (num_glyphs);
default:return 0;
}
}
hb_codepoint_t get_sid (hb_codepoint_t glyph, unsigned int num_glyphs) const
{
if (unlikely (glyph >= num_glyphs)) return 0;
switch (format)
{
case 0: return u.format0.get_sid (glyph);
case 1: return u.format1.get_sid (glyph);
case 2: return u.format2.get_sid (glyph);
default:return 0;
}
}
hb_codepoint_t get_glyph (hb_codepoint_t sid, unsigned int num_glyphs) const
{
switch (format)
{
case 0: return u.format0.get_glyph (sid, num_glyphs);
case 1: return u.format1.get_glyph (sid, num_glyphs);
case 2: return u.format2.get_glyph (sid, num_glyphs);
default:return 0;
}
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (unlikely (!c->check_struct (this)))
return_trace (false);
switch (format)
{
case 0: return_trace (u.format0.sanitize (c, c->get_num_glyphs ()));
case 1: return_trace (u.format1.sanitize (c, c->get_num_glyphs ()));
case 2: return_trace (u.format2.sanitize (c, c->get_num_glyphs ()));
default:return_trace (false);
}
}
HBUINT8 format;
union {
Charset0 format0;
Charset1 format1;
Charset2 format2;
} u;
DEFINE_SIZE_MIN (1);
};
struct CFF1StringIndex : CFF1Index
{
bool serialize (hb_serialize_context_t *c, const CFF1StringIndex &strings,
unsigned int offSize_, const hb_inc_bimap_t &sidmap)
{
TRACE_SERIALIZE (this);
if (unlikely ((strings.count == 0) || (sidmap.get_population () == 0)))
{
if (unlikely (!c->extend_min (this->count)))
return_trace (false);
count = 0;
return_trace (true);
}
byte_str_array_t bytesArray;
bytesArray.init ();
if (!bytesArray.resize (sidmap.get_population ()))
return_trace (false);
for (unsigned int i = 0; i < strings.count; i++)
{
hb_codepoint_t j = sidmap[i];
if (j != CFF_UNDEF_CODE)
bytesArray[j] = strings[i];
}
bool result = CFF1Index::serialize (c, offSize_, bytesArray);
bytesArray.fini ();
return_trace (result);
}
/* in parallel to above */
unsigned int calculate_serialized_size (unsigned int &offSize_ /*OUT*/, const hb_inc_bimap_t &sidmap) const
{
offSize_ = 0;
if ((count == 0) || (sidmap.get_population () == 0))
return count.static_size;
unsigned int dataSize = 0;
for (unsigned int i = 0; i < count; i++)
if (sidmap[i] != CFF_UNDEF_CODE)
dataSize += length_at (i);
offSize_ = calcOffSize(dataSize);
return CFF1Index::calculate_serialized_size (offSize_, sidmap.get_population (), dataSize);
}
};
struct cff1_top_dict_interp_env_t : num_interp_env_t
{
cff1_top_dict_interp_env_t ()
: num_interp_env_t(), prev_offset(0), last_offset(0) {}
unsigned int prev_offset;
unsigned int last_offset;
};
struct name_dict_values_t
{
enum name_dict_val_index_t
{
version,
notice,
copyright,
fullName,
familyName,
weight,
postscript,
fontName,
baseFontName,
registry,
ordering,
ValCount
};
void init ()
{
for (unsigned int i = 0; i < ValCount; i++)
values[i] = CFF_UNDEF_SID;
}
unsigned int& operator[] (unsigned int i)
{ assert (i < ValCount); return values[i]; }
unsigned int operator[] (unsigned int i) const
{ assert (i < ValCount); return values[i]; }
static enum name_dict_val_index_t name_op_to_index (op_code_t op)
{
switch (op) {
default: // can't happen - just make some compiler happy
case OpCode_version:
return version;
case OpCode_Notice:
return notice;
case OpCode_Copyright:
return copyright;
case OpCode_FullName:
return fullName;
case OpCode_FamilyName:
return familyName;
case OpCode_Weight:
return weight;
case OpCode_PostScript:
return postscript;
case OpCode_FontName:
return fontName;
case OpCode_BaseFontName:
return baseFontName;
}
}
unsigned int values[ValCount];
};
struct cff1_top_dict_val_t : op_str_t
{
unsigned int last_arg_offset;
};
struct cff1_top_dict_values_t : top_dict_values_t<cff1_top_dict_val_t>
{
void init ()
{
top_dict_values_t<cff1_top_dict_val_t>::init ();
nameSIDs.init ();
ros_supplement = 0;
cidCount = 8720;
EncodingOffset = 0;
CharsetOffset = 0;
FDSelectOffset = 0;
privateDictInfo.init ();
}
void fini () { top_dict_values_t<cff1_top_dict_val_t>::fini (); }
bool is_CID () const
{ return nameSIDs[name_dict_values_t::registry] != CFF_UNDEF_SID; }
name_dict_values_t nameSIDs;
unsigned int ros_supplement_offset;
unsigned int ros_supplement;
unsigned int cidCount;
unsigned int EncodingOffset;
unsigned int CharsetOffset;
unsigned int FDSelectOffset;
table_info_t privateDictInfo;
};
struct cff1_top_dict_opset_t : top_dict_opset_t<cff1_top_dict_val_t>
{
static void process_op (op_code_t op, cff1_top_dict_interp_env_t& env, cff1_top_dict_values_t& dictval)
{
cff1_top_dict_val_t val;
val.last_arg_offset = (env.last_offset-1) - dictval.opStart; /* offset to the last argument */
switch (op) {
case OpCode_version:
case OpCode_Notice:
case OpCode_Copyright:
case OpCode_FullName:
case OpCode_FamilyName:
case OpCode_Weight:
case OpCode_PostScript:
case OpCode_BaseFontName:
dictval.nameSIDs[name_dict_values_t::name_op_to_index (op)] = env.argStack.pop_uint ();
env.clear_args ();
break;
case OpCode_isFixedPitch:
case OpCode_ItalicAngle:
case OpCode_UnderlinePosition:
case OpCode_UnderlineThickness:
case OpCode_PaintType:
case OpCode_CharstringType:
case OpCode_UniqueID:
case OpCode_StrokeWidth:
case OpCode_SyntheticBase:
case OpCode_CIDFontVersion:
case OpCode_CIDFontRevision:
case OpCode_CIDFontType:
case OpCode_UIDBase:
case OpCode_FontBBox:
case OpCode_XUID:
case OpCode_BaseFontBlend:
env.clear_args ();
break;
case OpCode_CIDCount:
dictval.cidCount = env.argStack.pop_uint ();
env.clear_args ();
break;
case OpCode_ROS:
dictval.ros_supplement = env.argStack.pop_uint ();
dictval.nameSIDs[name_dict_values_t::ordering] = env.argStack.pop_uint ();
dictval.nameSIDs[name_dict_values_t::registry] = env.argStack.pop_uint ();
env.clear_args ();
break;
case OpCode_Encoding:
dictval.EncodingOffset = env.argStack.pop_uint ();
env.clear_args ();
if (unlikely (dictval.EncodingOffset == 0)) return;
break;
case OpCode_charset:
dictval.CharsetOffset = env.argStack.pop_uint ();
env.clear_args ();
if (unlikely (dictval.CharsetOffset == 0)) return;
break;
case OpCode_FDSelect:
dictval.FDSelectOffset = env.argStack.pop_uint ();
env.clear_args ();
break;
case OpCode_Private:
dictval.privateDictInfo.offset = env.argStack.pop_uint ();
dictval.privateDictInfo.size = env.argStack.pop_uint ();
env.clear_args ();
break;
default:
env.last_offset = env.str_ref.offset;
top_dict_opset_t<cff1_top_dict_val_t>::process_op (op, env, dictval);
/* Record this operand below if stack is empty, otherwise done */
if (!env.argStack.is_empty ()) return;
break;
}
if (unlikely (env.in_error ())) return;
dictval.add_op (op, env.str_ref, val);
}
};
struct cff1_font_dict_values_t : dict_values_t<op_str_t>
{
void init ()
{
dict_values_t<op_str_t>::init ();
privateDictInfo.init ();
fontName = CFF_UNDEF_SID;
}
void fini () { dict_values_t<op_str_t>::fini (); }
table_info_t privateDictInfo;
unsigned int fontName;
};
struct cff1_font_dict_opset_t : dict_opset_t
{
static void process_op (op_code_t op, num_interp_env_t& env, cff1_font_dict_values_t& dictval)
{
switch (op) {
case OpCode_FontName:
dictval.fontName = env.argStack.pop_uint ();
env.clear_args ();
break;
case OpCode_FontMatrix:
case OpCode_PaintType:
env.clear_args ();
break;
case OpCode_Private:
dictval.privateDictInfo.offset = env.argStack.pop_uint ();
dictval.privateDictInfo.size = env.argStack.pop_uint ();
env.clear_args ();
break;
default:
dict_opset_t::process_op (op, env);
if (!env.argStack.is_empty ()) return;
break;
}
if (unlikely (env.in_error ())) return;
dictval.add_op (op, env.str_ref);
}
};
template <typename VAL>
struct cff1_private_dict_values_base_t : dict_values_t<VAL>
{
void init ()
{
dict_values_t<VAL>::init ();
subrsOffset = 0;
localSubrs = &Null(CFF1Subrs);
}
void fini () { dict_values_t<VAL>::fini (); }
unsigned int calculate_serialized_size () const
{
unsigned int size = 0;
for (unsigned int i = 0; i < dict_values_t<VAL>::get_count; i++)
if (dict_values_t<VAL>::get_value (i).op == OpCode_Subrs)
size += OpCode_Size (OpCode_shortint) + 2 + OpCode_Size (OpCode_Subrs);
else
size += dict_values_t<VAL>::get_value (i).str.length;
return size;
}
unsigned int subrsOffset;
const CFF1Subrs *localSubrs;
};
typedef cff1_private_dict_values_base_t<op_str_t> cff1_private_dict_values_subset_t;
typedef cff1_private_dict_values_base_t<num_dict_val_t> cff1_private_dict_values_t;
struct cff1_private_dict_opset_t : dict_opset_t
{
static void process_op (op_code_t op, num_interp_env_t& env, cff1_private_dict_values_t& dictval)
{
num_dict_val_t val;
val.init ();
switch (op) {
case OpCode_BlueValues:
case OpCode_OtherBlues:
case OpCode_FamilyBlues:
case OpCode_FamilyOtherBlues:
case OpCode_StemSnapH:
case OpCode_StemSnapV:
env.clear_args ();
break;
case OpCode_StdHW:
case OpCode_StdVW:
case OpCode_BlueScale:
case OpCode_BlueShift:
case OpCode_BlueFuzz:
case OpCode_ForceBold:
case OpCode_LanguageGroup:
case OpCode_ExpansionFactor:
case OpCode_initialRandomSeed:
case OpCode_defaultWidthX:
case OpCode_nominalWidthX:
val.single_val = env.argStack.pop_num ();
env.clear_args ();
break;
case OpCode_Subrs:
dictval.subrsOffset = env.argStack.pop_uint ();
env.clear_args ();
break;
default:
dict_opset_t::process_op (op, env);
if (!env.argStack.is_empty ()) return;
break;
}
if (unlikely (env.in_error ())) return;
dictval.add_op (op, env.str_ref, val);
}
};
struct cff1_private_dict_opset_subset : dict_opset_t
{
static void process_op (op_code_t op, num_interp_env_t& env, cff1_private_dict_values_subset_t& dictval)
{
switch (op) {
case OpCode_BlueValues:
case OpCode_OtherBlues:
case OpCode_FamilyBlues:
case OpCode_FamilyOtherBlues:
case OpCode_StemSnapH:
case OpCode_StemSnapV:
case OpCode_StdHW:
case OpCode_StdVW:
case OpCode_BlueScale:
case OpCode_BlueShift:
case OpCode_BlueFuzz:
case OpCode_ForceBold:
case OpCode_LanguageGroup:
case OpCode_ExpansionFactor:
case OpCode_initialRandomSeed:
case OpCode_defaultWidthX:
case OpCode_nominalWidthX:
env.clear_args ();
break;
case OpCode_Subrs:
dictval.subrsOffset = env.argStack.pop_uint ();
env.clear_args ();
break;
default:
dict_opset_t::process_op (op, env);
if (!env.argStack.is_empty ()) return;
break;
}
if (unlikely (env.in_error ())) return;
dictval.add_op (op, env.str_ref);
}
};
typedef dict_interpreter_t<cff1_top_dict_opset_t, cff1_top_dict_values_t, cff1_top_dict_interp_env_t> cff1_top_dict_interpreter_t;
typedef dict_interpreter_t<cff1_font_dict_opset_t, cff1_font_dict_values_t> cff1_font_dict_interpreter_t;
typedef CFF1Index CFF1NameIndex;
typedef CFF1IndexOf<TopDict> CFF1TopDictIndex;
} /* namespace CFF */
namespace OT {
using namespace CFF;
struct cff1
{
static constexpr hb_tag_t tableTag = HB_OT_TAG_cff1;
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
likely (version.major == 1));
}
template <typename PRIVOPSET, typename PRIVDICTVAL>
struct accelerator_templ_t
{
void init (hb_face_t *face)
{
topDict.init ();
fontDicts.init ();
privateDicts.init ();
this->blob = sc.reference_table<cff1> (face);
/* setup for run-time santization */
sc.init (this->blob);
sc.start_processing ();
const OT::cff1 *cff = this->blob->template as<OT::cff1> ();
if (cff == &Null(OT::cff1))
{ fini (); return; }
nameIndex = &cff->nameIndex (cff);
if ((nameIndex == &Null (CFF1NameIndex)) || !nameIndex->sanitize (&sc))
{ fini (); return; }
topDictIndex = &StructAtOffset<CFF1TopDictIndex> (nameIndex, nameIndex->get_size ());
if ((topDictIndex == &Null (CFF1TopDictIndex)) || !topDictIndex->sanitize (&sc) || (topDictIndex->count == 0))
{ fini (); return; }
{ /* parse top dict */
const byte_str_t topDictStr = (*topDictIndex)[0];
if (unlikely (!topDictStr.sanitize (&sc))) { fini (); return; }
cff1_top_dict_interpreter_t top_interp;
top_interp.env.init (topDictStr);
topDict.init ();
if (unlikely (!top_interp.interpret (topDict))) { fini (); return; }
}
if (is_predef_charset ())
charset = &Null(Charset);
else
{
charset = &StructAtOffsetOrNull<Charset> (cff, topDict.CharsetOffset);
if (unlikely ((charset == &Null (Charset)) || !charset->sanitize (&sc))) { fini (); return; }
}
fdCount = 1;
if (is_CID ())
{
fdArray = &StructAtOffsetOrNull<CFF1FDArray> (cff, topDict.FDArrayOffset);
fdSelect = &StructAtOffsetOrNull<CFF1FDSelect> (cff, topDict.FDSelectOffset);
if (unlikely ((fdArray == &Null(CFF1FDArray)) || !fdArray->sanitize (&sc) ||
(fdSelect == &Null(CFF1FDSelect)) || !fdSelect->sanitize (&sc, fdArray->count)))
{ fini (); return; }
fdCount = fdArray->count;
}
else
{
fdArray = &Null(CFF1FDArray);
fdSelect = &Null(CFF1FDSelect);
}
encoding = &Null(Encoding);
if (is_CID ())
{
if (unlikely (charset == &Null(Charset))) { fini (); return; }
}
else
{
if (!is_predef_encoding ())
{
encoding = &StructAtOffsetOrNull<Encoding> (cff, topDict.EncodingOffset);
if (unlikely ((encoding == &Null (Encoding)) || !encoding->sanitize (&sc))) { fini (); return; }
}
}
stringIndex = &StructAtOffset<CFF1StringIndex> (topDictIndex, topDictIndex->get_size ());
if ((stringIndex == &Null (CFF1StringIndex)) || !stringIndex->sanitize (&sc))
{ fini (); return; }
globalSubrs = &StructAtOffset<CFF1Subrs> (stringIndex, stringIndex->get_size ());
if ((globalSubrs != &Null (CFF1Subrs)) && !globalSubrs->sanitize (&sc))
{ fini (); return; }
charStrings = &StructAtOffsetOrNull<CFF1CharStrings> (cff, topDict.charStringsOffset);
if ((charStrings == &Null(CFF1CharStrings)) || unlikely (!charStrings->sanitize (&sc)))
{ fini (); return; }
num_glyphs = charStrings->count;
if (num_glyphs != sc.get_num_glyphs ())
{ fini (); return; }
privateDicts.resize (fdCount);
for (unsigned int i = 0; i < fdCount; i++)
privateDicts[i].init ();
// parse CID font dicts and gather private dicts
if (is_CID ())
{
for (unsigned int i = 0; i < fdCount; i++)
{
byte_str_t fontDictStr = (*fdArray)[i];
if (unlikely (!fontDictStr.sanitize (&sc))) { fini (); return; }
cff1_font_dict_values_t *font;
cff1_font_dict_interpreter_t font_interp;
font_interp.env.init (fontDictStr);
font = fontDicts.push ();
if (unlikely (font == &Crap(cff1_font_dict_values_t))) { fini (); return; }
font->init ();
if (unlikely (!font_interp.interpret (*font))) { fini (); return; }
PRIVDICTVAL *priv = &privateDicts[i];
const byte_str_t privDictStr (StructAtOffset<UnsizedByteStr> (cff, font->privateDictInfo.offset), font->privateDictInfo.size);
if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; }
dict_interpreter_t<PRIVOPSET, PRIVDICTVAL> priv_interp;
priv_interp.env.init (privDictStr);
priv->init ();
if (unlikely (!priv_interp.interpret (*priv))) { fini (); return; }
priv->localSubrs = &StructAtOffsetOrNull<CFF1Subrs> (&privDictStr, priv->subrsOffset);
if (priv->localSubrs != &Null(CFF1Subrs) &&
unlikely (!priv->localSubrs->sanitize (&sc)))
{ fini (); return; }
}
}
else /* non-CID */
{
cff1_top_dict_values_t *font = &topDict;
PRIVDICTVAL *priv = &privateDicts[0];
const byte_str_t privDictStr (StructAtOffset<UnsizedByteStr> (cff, font->privateDictInfo.offset), font->privateDictInfo.size);
if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; }
dict_interpreter_t<PRIVOPSET, PRIVDICTVAL> priv_interp;
priv_interp.env.init (privDictStr);
priv->init ();
if (unlikely (!priv_interp.interpret (*priv))) { fini (); return; }
priv->localSubrs = &StructAtOffsetOrNull<CFF1Subrs> (&privDictStr, priv->subrsOffset);
if (priv->localSubrs != &Null(CFF1Subrs) &&
unlikely (!priv->localSubrs->sanitize (&sc)))
{ fini (); return; }
}
}
void fini ()
{
sc.end_processing ();
topDict.fini ();
fontDicts.fini_deep ();
privateDicts.fini_deep ();
hb_blob_destroy (blob);
blob = nullptr;
}
bool is_valid () const { return blob != nullptr; }
bool is_CID () const { return topDict.is_CID (); }
bool is_predef_charset () const { return topDict.CharsetOffset <= ExpertSubsetCharset; }
unsigned int std_code_to_glyph (hb_codepoint_t code) const
{
hb_codepoint_t sid = lookup_standard_encoding_for_sid (code);
if (unlikely (sid == CFF_UNDEF_SID))
return 0;
if (charset != &Null(Charset))
return charset->get_glyph (sid, num_glyphs);
else if ((topDict.CharsetOffset == ISOAdobeCharset)
&& (code <= 228 /*zcaron*/)) return sid;
return 0;
}
bool is_predef_encoding () const { return topDict.EncodingOffset <= ExpertEncoding; }
hb_codepoint_t glyph_to_code (hb_codepoint_t glyph) const
{
if (encoding != &Null(Encoding))
return encoding->get_code (glyph);
else
{
hb_codepoint_t sid = glyph_to_sid (glyph);
if (sid == 0) return 0;
hb_codepoint_t code = 0;
switch (topDict.EncodingOffset)
{
case StandardEncoding:
code = lookup_standard_encoding_for_code (sid);
break;
case ExpertEncoding:
code = lookup_expert_encoding_for_code (sid);
break;
default:
break;
}
return code;
}
}
hb_codepoint_t glyph_to_sid (hb_codepoint_t glyph) const
{
if (charset != &Null(Charset))
return charset->get_sid (glyph, num_glyphs);
else
{
hb_codepoint_t sid = 0;
switch (topDict.CharsetOffset)
{
case ISOAdobeCharset:
if (glyph <= 228 /*zcaron*/) sid = glyph;
break;
case ExpertCharset:
sid = lookup_expert_charset_for_sid (glyph);
break;
case ExpertSubsetCharset:
sid = lookup_expert_subset_charset_for_sid (glyph);
break;
default:
break;
}
return sid;
}
}
protected:
hb_blob_t *blob;
hb_sanitize_context_t sc;
public:
const Encoding *encoding;
const Charset *charset;
const CFF1NameIndex *nameIndex;
const CFF1TopDictIndex *topDictIndex;
const CFF1StringIndex *stringIndex;
const CFF1Subrs *globalSubrs;
const CFF1CharStrings *charStrings;
const CFF1FDArray *fdArray;
const CFF1FDSelect *fdSelect;
unsigned int fdCount;
cff1_top_dict_values_t topDict;
hb_vector_t<cff1_font_dict_values_t> fontDicts;
hb_vector_t<PRIVDICTVAL> privateDicts;
unsigned int num_glyphs;
};
struct accelerator_t : accelerator_templ_t<cff1_private_dict_opset_t, cff1_private_dict_values_t>
{
void init (hb_face_t *face)
{
SUPER::init (face);
if (!is_valid ()) return;
if (is_CID ()) return;
/* fill glyph_names */
for (hb_codepoint_t gid = 0; gid < num_glyphs; gid++)
{
hb_codepoint_t sid = glyph_to_sid (gid);
gname_t gname;
gname.sid = sid;
if (sid < cff1_std_strings_length)
gname.name = cff1_std_strings (sid);
else
{
byte_str_t ustr = (*stringIndex)[sid - cff1_std_strings_length];
gname.name = hb_bytes_t ((const char*)ustr.arrayZ, ustr.length);
}
if (unlikely (gname.name.arrayZ == nullptr)) { fini (); return; }
glyph_names.push (gname);
}
glyph_names.qsort ();
}
void fini ()
{
glyph_names.fini ();
SUPER::fini ();
}
bool get_glyph_name (hb_codepoint_t glyph,
char *buf, unsigned int buf_len) const
{
if (!buf) return true;
if (unlikely (!is_valid ())) return false;
if (is_CID()) return false;
hb_codepoint_t sid = glyph_to_sid (glyph);
const char *str;
size_t str_len;
if (sid < cff1_std_strings_length)
{
hb_bytes_t byte_str = cff1_std_strings (sid);
str = byte_str.arrayZ;
str_len = byte_str.length;
}
else
{
byte_str_t ubyte_str = (*stringIndex)[sid - cff1_std_strings_length];
str = (const char *)ubyte_str.arrayZ;
str_len = ubyte_str.length;
}
if (!str_len) return false;
unsigned int len = hb_min (buf_len - 1, str_len);
strncpy (buf, (const char*)str, len);
buf[len] = '\0';
return true;
}
bool get_glyph_from_name (const char *name, int len,
hb_codepoint_t *glyph) const
{
if (len < 0) len = strlen (name);
if (unlikely (!len)) return false;
gname_t key = { hb_bytes_t (name, len), 0 };
const gname_t *gname = glyph_names.bsearch (key);
if (gname == nullptr) return false;
hb_codepoint_t gid = charset->get_glyph (gname->sid, num_glyphs);
if (!gid && gname->sid) return false;
*glyph = gid;
return true;
}
HB_INTERNAL bool get_extents (hb_font_t *font, hb_codepoint_t glyph, hb_glyph_extents_t *extents) const;
HB_INTERNAL bool get_seac_components (hb_codepoint_t glyph, hb_codepoint_t *base, hb_codepoint_t *accent) const;
private:
struct gname_t
{
hb_bytes_t name;
uint16_t sid;
static int cmp (const void *a_, const void *b_)
{
const gname_t *a = (const gname_t *)a_;
const gname_t *b = (const gname_t *)b_;
int minlen = hb_min (a->name.length, b->name.length);
int ret = strncmp (a->name.arrayZ, b->name.arrayZ, minlen);
if (ret) return ret;
return a->name.length - b->name.length;
}
int cmp (const gname_t &a) const { return cmp (&a, this); }
};
hb_sorted_vector_t<gname_t> glyph_names;
typedef accelerator_templ_t<cff1_private_dict_opset_t, cff1_private_dict_values_t> SUPER;
};
struct accelerator_subset_t : accelerator_templ_t<cff1_private_dict_opset_subset, cff1_private_dict_values_subset_t> {};
bool subset (hb_subset_plan_t *plan) const
{
hb_blob_t *cff_prime = nullptr;
bool success = true;
if (hb_subset_cff1 (plan, &cff_prime)) {
success = success && plan->add_table (HB_OT_TAG_cff1, cff_prime);
hb_blob_t *head_blob = hb_sanitize_context_t().reference_table<head> (plan->source);
success = success && head_blob && plan->add_table (HB_OT_TAG_head, head_blob);
hb_blob_destroy (head_blob);
} else {
success = false;
}
hb_blob_destroy (cff_prime);
return success;
}
protected:
HB_INTERNAL static hb_codepoint_t lookup_standard_encoding_for_code (hb_codepoint_t sid);
HB_INTERNAL static hb_codepoint_t lookup_expert_encoding_for_code (hb_codepoint_t sid);
HB_INTERNAL static hb_codepoint_t lookup_expert_charset_for_sid (hb_codepoint_t glyph);
HB_INTERNAL static hb_codepoint_t lookup_expert_subset_charset_for_sid (hb_codepoint_t glyph);
HB_INTERNAL static hb_codepoint_t lookup_standard_encoding_for_sid (hb_codepoint_t code);
public:
FixedVersion<HBUINT8> version; /* Version of CFF table. set to 0x0100u */
OffsetTo<CFF1NameIndex, HBUINT8> nameIndex; /* headerSize = Offset to Name INDEX. */
HBUINT8 offSize; /* offset size (unused?) */
public:
DEFINE_SIZE_STATIC (4);
};
struct cff1_accelerator_t : cff1::accelerator_t {};
} /* namespace OT */
#endif /* HB_OT_CFF1_TABLE_HH */
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