| /* |
| * Copyright © 2018 Adobe Systems Incorporated. |
| * |
| * 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_SUBSET_CFF_COMMON_HH |
| #define HB_SUBSET_CFF_COMMON_HH |
| |
| #include "hb.hh" |
| |
| #include "hb-subset-plan.hh" |
| #include "hb-cff-interp-cs-common.hh" |
| |
| namespace CFF { |
| |
| /* Used for writing a temporary charstring */ |
| struct ByteStrBuff : hb_vector_t<char, 1> |
| { |
| inline bool encode_byte (unsigned char b) |
| { |
| return (push ((const char)b) != &Crap(char)); |
| } |
| |
| inline bool encode_int (int v) |
| { |
| if ((-1131 <= v) && (v <= 1131)) |
| { |
| if ((-107 <= v) && (v <= 107)) |
| return encode_byte (v + 139); |
| else if (v > 0) |
| { |
| v -= 108; |
| return encode_byte ((v >> 8) + OpCode_TwoBytePosInt0) && encode_byte (v & 0xFF); |
| } |
| else |
| { |
| v = -v - 108; |
| return encode_byte ((v >> 8) + OpCode_TwoByteNegInt0) && encode_byte (v & 0xFF); |
| } |
| } |
| assert ((-32768 <= v) && (v <= 32767)); |
| return encode_byte (OpCode_shortint) && |
| encode_byte ((v >> 8) & 0xFF) && |
| encode_byte (v & 0xFF); |
| } |
| |
| inline bool encode_num (const Number& n) |
| { |
| if (n.in_int_range ()) |
| { |
| return encode_int (n.to_int ()); |
| } |
| else |
| { |
| int32_t v = n.to_fixed (); |
| return encode_byte (OpCode_fixedcs) && |
| encode_byte ((v >> 24) & 0xFF) && |
| encode_byte ((v >> 16) & 0xFF) && |
| encode_byte ((v >> 8) & 0xFF) && |
| encode_byte (v & 0xFF); |
| } |
| } |
| |
| inline bool encode_op (OpCode op) |
| { |
| if (Is_OpCode_ESC (op)) |
| return encode_byte (OpCode_escape) && |
| encode_byte (Unmake_OpCode_ESC (op)); |
| else |
| return encode_byte (op); |
| } |
| }; |
| |
| struct ByteStrBuffArray : hb_vector_t<ByteStrBuff, 1> |
| { |
| inline void fini (void) |
| { |
| for (unsigned int i = 0; i < len; i++) |
| hb_vector_t<ByteStrBuff, 1>::operator[] (i).fini (); |
| hb_vector_t<ByteStrBuff, 1>::fini (); |
| } |
| }; |
| |
| struct CFFSubTableOffsets { |
| inline CFFSubTableOffsets (void) |
| : privateDictsOffset (0) |
| |
| { |
| topDictInfo.init (); |
| FDSelectInfo.init (); |
| FDArrayInfo.init (); |
| charStringsInfo.init (); |
| globalSubrsInfo.init (); |
| localSubrsInfos.init (); |
| } |
| |
| inline ~CFFSubTableOffsets (void) |
| { |
| localSubrsInfos.fini (); |
| } |
| |
| TableInfo topDictInfo; |
| TableInfo FDSelectInfo; |
| TableInfo FDArrayInfo; |
| TableInfo charStringsInfo; |
| unsigned int privateDictsOffset; |
| TableInfo globalSubrsInfo; |
| hb_vector_t<TableInfo> localSubrsInfos; |
| }; |
| |
| template <typename OPSTR=OpStr> |
| struct CFFTopDict_OpSerializer : OpSerializer |
| { |
| inline bool serialize (hb_serialize_context_t *c, |
| const OPSTR &opstr, |
| const CFFSubTableOffsets &offsets) const |
| { |
| TRACE_SERIALIZE (this); |
| |
| switch (opstr.op) |
| { |
| case OpCode_CharStrings: |
| return_trace (FontDict::serialize_offset4_op(c, opstr.op, offsets.charStringsInfo.offset)); |
| |
| case OpCode_FDArray: |
| return_trace (FontDict::serialize_offset4_op(c, opstr.op, offsets.FDArrayInfo.offset)); |
| |
| case OpCode_FDSelect: |
| return_trace (FontDict::serialize_offset4_op(c, opstr.op, offsets.FDSelectInfo.offset)); |
| |
| default: |
| return_trace (copy_opstr (c, opstr)); |
| } |
| return_trace (true); |
| } |
| |
| inline unsigned int calculate_serialized_size (const OPSTR &opstr) const |
| { |
| switch (opstr.op) |
| { |
| case OpCode_CharStrings: |
| case OpCode_FDArray: |
| case OpCode_FDSelect: |
| return OpCode_Size (OpCode_longintdict) + 4 + OpCode_Size (opstr.op); |
| |
| default: |
| return opstr.str.len; |
| } |
| } |
| }; |
| |
| struct CFFFontDict_OpSerializer : OpSerializer |
| { |
| inline bool serialize (hb_serialize_context_t *c, |
| const OpStr &opstr, |
| const TableInfo &privateDictInfo) const |
| { |
| TRACE_SERIALIZE (this); |
| |
| if (opstr.op == OpCode_Private) |
| { |
| /* serialize the private dict size & offset as 2-byte & 4-byte integers */ |
| if (unlikely (!UnsizedByteStr::serialize_int2 (c, privateDictInfo.size) || |
| !UnsizedByteStr::serialize_int4 (c, privateDictInfo.offset))) |
| return_trace (false); |
| |
| /* serialize the opcode */ |
| HBUINT8 *p = c->allocate_size<HBUINT8> (1); |
| if (unlikely (p == nullptr)) return_trace (false); |
| p->set (OpCode_Private); |
| |
| return_trace (true); |
| } |
| else |
| { |
| HBUINT8 *d = c->allocate_size<HBUINT8> (opstr.str.len); |
| if (unlikely (d == nullptr)) return_trace (false); |
| memcpy (d, &opstr.str.str[0], opstr.str.len); |
| } |
| return_trace (true); |
| } |
| |
| inline unsigned int calculate_serialized_size (const OpStr &opstr) const |
| { |
| if (opstr.op == OpCode_Private) |
| return OpCode_Size (OpCode_longintdict) + 4 + OpCode_Size (OpCode_shortint) + 2 + OpCode_Size (OpCode_Private); |
| else |
| return opstr.str.len; |
| } |
| }; |
| |
| struct CFFPrivateDict_OpSerializer : OpSerializer |
| { |
| inline CFFPrivateDict_OpSerializer (bool drop_hints_=false) |
| : drop_hints (drop_hints_) {} |
| |
| inline bool serialize (hb_serialize_context_t *c, |
| const OpStr &opstr, |
| const unsigned int subrsOffset) const |
| { |
| TRACE_SERIALIZE (this); |
| |
| if (drop_hints && DictOpSet::is_hint_op (opstr.op)) |
| return true; |
| if (opstr.op == OpCode_Subrs) |
| return_trace (true); |
| else |
| return_trace (copy_opstr (c, opstr)); |
| } |
| |
| inline unsigned int calculate_serialized_size (const OpStr &opstr) const |
| { |
| if (drop_hints && DictOpSet::is_hint_op (opstr.op)) |
| return 0; |
| if (opstr.op == OpCode_Subrs) |
| return 0; |
| else |
| return opstr.str.len; |
| } |
| |
| protected: |
| const bool drop_hints; |
| }; |
| |
| struct FlattenParam |
| { |
| ByteStrBuff &flatStr; |
| bool drop_hints; |
| }; |
| |
| template <typename ACC, typename ENV, typename OPSET> |
| struct SubrFlattener |
| { |
| inline SubrFlattener (const ACC &acc_, |
| const hb_vector_t<hb_codepoint_t> &glyphs_, |
| bool drop_hints_) |
| : acc (acc_), |
| glyphs (glyphs_), |
| drop_hints (drop_hints_) |
| {} |
| |
| inline bool flatten (ByteStrBuffArray &flat_charstrings) |
| { |
| if (!flat_charstrings.resize (glyphs.len)) |
| return false; |
| for (unsigned int i = 0; i < glyphs.len; i++) |
| flat_charstrings[i].init (); |
| for (unsigned int i = 0; i < glyphs.len; i++) |
| { |
| hb_codepoint_t glyph = glyphs[i]; |
| const ByteStr str = (*acc.charStrings)[glyph]; |
| unsigned int fd = acc.fdSelect->get_fd (glyph); |
| CSInterpreter<ENV, OPSET, FlattenParam> interp; |
| interp.env.init (str, acc, fd); |
| FlattenParam param = { flat_charstrings[i], drop_hints }; |
| if (unlikely (!interp.interpret (param))) |
| return false; |
| } |
| return true; |
| } |
| |
| const ACC &acc; |
| const hb_vector_t<hb_codepoint_t> &glyphs; |
| bool drop_hints; |
| }; |
| }; /* namespace CFF */ |
| |
| HB_INTERNAL bool |
| hb_plan_subset_cff_fdselect (const hb_vector_t<hb_codepoint_t> &glyphs, |
| unsigned int fdCount, |
| const CFF::FDSelect &src, /* IN */ |
| unsigned int &subset_fd_count /* OUT */, |
| unsigned int &subset_fdselect_size /* OUT */, |
| unsigned int &subset_fdselect_format /* OUT */, |
| hb_vector_t<CFF::code_pair> &fdselect_ranges /* OUT */, |
| CFF::Remap &fdmap /* OUT */); |
| |
| HB_INTERNAL bool |
| hb_serialize_cff_fdselect (hb_serialize_context_t *c, |
| unsigned int num_glyphs, |
| const CFF::FDSelect &src, |
| unsigned int fd_count, |
| unsigned int fdselect_format, |
| unsigned int size, |
| const hb_vector_t<CFF::code_pair> &fdselect_ranges, |
| const CFF::Remap &fdmap); |
| |
| #endif /* HB_SUBSET_CFF_COMMON_HH */ |
