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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_CFF_COMMON_HH
+#define HB_OT_CFF_COMMON_HH
+
+#include "hb-open-type.hh"
+#include "hb-bimap.hh"
+#include "hb-ot-layout-common.hh"
+#include "hb-cff-interp-dict-common.hh"
+#include "hb-subset-plan.hh"
+
+namespace CFF {
+
+using namespace OT;
+
+#define CFF_UNDEF_CODE 0xFFFFFFFF
+
+using objidx_t = hb_serialize_context_t::objidx_t;
+using whence_t = hb_serialize_context_t::whence_t;
+
+/* utility macro */
+template<typename Type>
+static inline const Type& StructAtOffsetOrNull (const void *P, unsigned int offset)
+{ return offset ? StructAtOffset<Type> (P, offset) : Null (Type); }
+
+struct code_pair_t
+{
+ hb_codepoint_t code;
+ hb_codepoint_t glyph;
+};
+
+using str_buff_t = hb_vector_t<unsigned char>;
+using str_buff_vec_t = hb_vector_t<str_buff_t>;
+
+/* CFF INDEX */
+template <typename COUNT>
+struct CFFIndex
+{
+ unsigned int offset_array_size () const
+ { return offSize * (count + 1); }
+
+ CFFIndex *copy (hb_serialize_context_t *c) const
+ {
+ TRACE_SERIALIZE (this);
+ unsigned int size = get_size ();
+ CFFIndex *out = c->allocate_size<CFFIndex> (size, false);
+ if (likely (out))
+ hb_memcpy (out, this, size);
+ return_trace (out);
+ }
+
+ template <typename Iterable,
+ hb_requires (hb_is_iterable (Iterable))>
+ bool serialize (hb_serialize_context_t *c,
+ const Iterable &iterable)
+ {
+ TRACE_SERIALIZE (this);
+ auto it = hb_iter (iterable);
+ serialize_header(c, + it | hb_map (hb_iter) | hb_map (hb_len));
+ for (const auto &_ : +it)
+ hb_iter (_).copy (c);
+ return_trace (true);
+ }
+
+ template <typename Iterator,
+ hb_requires (hb_is_iterator (Iterator))>
+ bool serialize_header (hb_serialize_context_t *c,
+ Iterator it)
+ {
+ TRACE_SERIALIZE (this);
+
+ unsigned total = + it | hb_reduce (hb_add, 0);
+ unsigned off_size = (hb_bit_storage (total + 1) + 7) / 8;
+
+ /* serialize CFFIndex header */
+ if (unlikely (!c->extend_min (this))) return_trace (false);
+ this->count = it.len ();
+ if (!this->count) return_trace (true);
+ if (unlikely (!c->extend (this->offSize))) return_trace (false);
+ this->offSize = off_size;
+ if (unlikely (!c->allocate_size<HBUINT8> (off_size * (this->count + 1), false)))
+ return_trace (false);
+
+ /* serialize indices */
+ unsigned int offset = 1;
+ unsigned int i = 0;
+ for (unsigned _ : +it)
+ {
+ set_offset_at (i++, offset);
+ offset += _;
+ }
+ set_offset_at (i, offset);
+
+ return_trace (true);
+ }
+
+ template <typename Iterable,
+ hb_requires (hb_is_iterable (Iterable))>
+ static unsigned total_size (const Iterable &iterable)
+ {
+ auto it = + hb_iter (iterable) | hb_map (hb_iter) | hb_map (hb_len);
+ if (!it) return 0;
+
+ unsigned total = + it | hb_reduce (hb_add, 0);
+ unsigned off_size = (hb_bit_storage (total + 1) + 7) / 8;
+
+ return min_size + HBUINT8::static_size + (hb_len (it) + 1) * off_size + total;
+ }
+
+ void set_offset_at (unsigned int index, unsigned int offset)
+ {
+ assert (index <= count);
+ HBUINT8 *p = offsets + offSize * index + offSize;
+ unsigned int size = offSize;
+ for (; size; size--)
+ {
+ --p;
+ *p = offset & 0xFF;
+ offset >>= 8;
+ }
+ }
+
+ private:
+ unsigned int offset_at (unsigned int index) const
+ {
+ assert (index <= count);
+
+ unsigned int size = offSize;
+ const HBUINT8 *p = offsets + size * index;
+ switch (size)
+ {
+ case 1: return * (HBUINT8 *) p;
+ case 2: return * (HBUINT16 *) p;
+ case 3: return * (HBUINT24 *) p;
+ case 4: return * (HBUINT32 *) p;
+ default: return 0;
+ }
+ }
+
+ unsigned int length_at (unsigned int index) const
+ {
+ unsigned offset0 = offset_at (index);
+ unsigned offset1 = offset_at (index + 1);
+ if (unlikely (offset1 < offset0 || offset1 > offset_at (count)))
+ return 0;
+ return offset1 - offset0;
+ }
+
+ const unsigned char *data_base () const
+ { return (const unsigned char *) this + min_size + offSize.static_size + offset_array_size (); }
+ public:
+
+ hb_ubytes_t operator [] (unsigned int index) const
+ {
+ if (unlikely (index >= count)) return hb_ubytes_t ();
+ _hb_compiler_memory_r_barrier ();
+ unsigned length = length_at (index);
+ if (unlikely (!length)) return hb_ubytes_t ();
+ return hb_ubytes_t (data_base () + offset_at (index) - 1, length);
+ }
+
+ unsigned int get_size () const
+ {
+ if (count)
+ return min_size + offSize.static_size + offset_array_size () + (offset_at (count) - 1);
+ return min_size; /* empty CFFIndex contains count only */
+ }
+
+ bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (likely (c->check_struct (this) &&
+ (count == 0 || /* empty INDEX */
+ (count < count + 1u &&
+ c->check_struct (&offSize) && offSize >= 1 && offSize <= 4 &&
+ c->check_array (offsets, offSize, count + 1u) &&
+ c->check_array ((const HBUINT8*) data_base (), 1, offset_at (count) - 1)))));
+ }
+
+ public:
+ COUNT count; /* Number of object data. Note there are (count+1) offsets */
+ private:
+ HBUINT8 offSize; /* The byte size of each offset in the offsets array. */
+ HBUINT8 offsets[HB_VAR_ARRAY];
+ /* The array of (count + 1) offsets into objects array (1-base). */
+ /* HBUINT8 data[HB_VAR_ARRAY]; Object data */
+ public:
+ DEFINE_SIZE_MIN (COUNT::static_size);
+};
+
+template <typename COUNT, typename TYPE>
+struct CFFIndexOf : CFFIndex<COUNT>
+{
+ template <typename DATA, typename PARAM1, typename PARAM2>
+ bool serialize (hb_serialize_context_t *c,
+ unsigned int offSize_,
+ const DATA *dataArray,
+ unsigned int dataArrayLen,
+ const hb_vector_t<unsigned int> &dataSizeArray,
+ const PARAM1 &param1,
+ const PARAM2 &param2)
+ {
+ TRACE_SERIALIZE (this);
+ /* serialize CFFIndex header */
+ if (unlikely (!c->extend_min (this))) return_trace (false);
+ this->count = dataArrayLen;
+ this->offSize = offSize_;
+ if (unlikely (!c->allocate_size<HBUINT8> (offSize_ * (dataArrayLen + 1), false)))
+ return_trace (false);
+
+ /* serialize indices */
+ unsigned int offset = 1;
+ unsigned int i = 0;
+ for (; i < dataArrayLen; i++)
+ {
+ this->set_offset_at (i, offset);
+ offset += dataSizeArray[i];
+ }
+ this->set_offset_at (i, offset);
+
+ /* serialize data */
+ for (unsigned int i = 0; i < dataArrayLen; i++)
+ {
+ TYPE *dest = c->start_embed<TYPE> ();
+ if (unlikely (!dest || !dest->serialize (c, dataArray[i], param1, param2)))
+ return_trace (false);
+ }
+ return_trace (true);
+ }
+};
+
+/* Top Dict, Font Dict, Private Dict */
+struct Dict : UnsizedByteStr
+{
+ template <typename DICTVAL, typename OP_SERIALIZER, typename ...Ts>
+ bool serialize (hb_serialize_context_t *c,
+ const DICTVAL &dictval,
+ OP_SERIALIZER& opszr,
+ Ts&&... ds)
+ {
+ TRACE_SERIALIZE (this);
+ for (unsigned int i = 0; i < dictval.get_count (); i++)
+ if (unlikely (!opszr.serialize (c, dictval[i], std::forward<Ts> (ds)...)))
+ return_trace (false);
+
+ return_trace (true);
+ }
+
+ template <typename T, typename V>
+ static bool serialize_int_op (hb_serialize_context_t *c, op_code_t op, V value, op_code_t intOp)
+ {
+ if (unlikely ((!serialize_int<T, V> (c, intOp, value))))
+ return false;
+
+ TRACE_SERIALIZE (this);
+ /* serialize the opcode */
+ HBUINT8 *p = c->allocate_size<HBUINT8> (OpCode_Size (op), false);
+ if (unlikely (!p)) return_trace (false);
+ if (Is_OpCode_ESC (op))
+ {
+ *p = OpCode_escape;
+ op = Unmake_OpCode_ESC (op);
+ p++;
+ }
+ *p = op;
+ return_trace (true);
+ }
+
+ template <typename V>
+ static bool serialize_int4_op (hb_serialize_context_t *c, op_code_t op, V value)
+ { return serialize_int_op<HBINT32> (c, op, value, OpCode_longintdict); }
+
+ template <typename V>
+ static bool serialize_int2_op (hb_serialize_context_t *c, op_code_t op, V value)
+ { return serialize_int_op<HBINT16> (c, op, value, OpCode_shortint); }
+
+ template <typename T, int int_op>
+ static bool serialize_link_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence)
+ {
+ T &ofs = *(T *) (c->head + OpCode_Size (int_op));
+ if (unlikely (!serialize_int_op<T> (c, op, 0, int_op))) return false;
+ c->add_link (ofs, link, whence);
+ return true;
+ }
+
+ static bool serialize_link4_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence = whence_t::Head)
+ { return serialize_link_op<HBINT32, OpCode_longintdict> (c, op, link, whence); }
+
+ static bool serialize_link2_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence = whence_t::Head)
+ { return serialize_link_op<HBINT16, OpCode_shortint> (c, op, link, whence); }
+};
+
+struct TopDict : Dict {};
+struct FontDict : Dict {};
+struct PrivateDict : Dict {};
+
+struct table_info_t
+{
+ void init () { offset = size = 0; link = 0; }
+
+ unsigned int offset;
+ unsigned int size;
+ objidx_t link;
+};
+
+template <typename COUNT>
+struct FDArray : CFFIndexOf<COUNT, FontDict>
+{
+ template <typename DICTVAL, typename INFO, typename Iterator, typename OP_SERIALIZER>
+ bool serialize (hb_serialize_context_t *c,
+ Iterator it,
+ OP_SERIALIZER& opszr)
+ {
+ TRACE_SERIALIZE (this);
+
+ /* serialize INDEX data */
+ hb_vector_t<unsigned> sizes;
+ c->push ();
+ + it
+ | hb_map ([&] (const hb_pair_t<const DICTVAL&, const INFO&> &_)
+ {
+ FontDict *dict = c->start_embed<FontDict> ();
+ dict->serialize (c, _.first, opszr, _.second);
+ return c->head - (const char*)dict;
+ })
+ | hb_sink (sizes)
+ ;
+ c->pop_pack (false);
+
+ /* serialize INDEX header */
+ return_trace (CFFIndex<COUNT>::serialize_header (c, hb_iter (sizes)));
+ }
+};
+
+/* FDSelect */
+struct FDSelect0 {
+ bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!(c->check_struct (this))))
+ return_trace (false);
+ if (unlikely (!c->check_array (fds, c->get_num_glyphs ())))
+ return_trace (false);
+
+ return_trace (true);
+ }
+
+ hb_codepoint_t get_fd (hb_codepoint_t glyph) const
+ { return (hb_codepoint_t) fds[glyph]; }
+
+ unsigned int get_size (unsigned int num_glyphs) const
+ { return HBUINT8::static_size * num_glyphs; }
+
+ HBUINT8 fds[HB_VAR_ARRAY];
+
+ DEFINE_SIZE_MIN (0);
+};
+
+template <typename GID_TYPE, typename FD_TYPE>
+struct FDSelect3_4_Range
+{
+ bool sanitize (hb_sanitize_context_t *c, const void * /*nullptr*/, unsigned int fdcount) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (first < c->get_num_glyphs () && (fd < fdcount));
+ }
+
+ GID_TYPE first;
+ FD_TYPE fd;
+ public:
+ DEFINE_SIZE_STATIC (GID_TYPE::static_size + FD_TYPE::static_size);
+};
+
+template <typename GID_TYPE, typename FD_TYPE>
+struct FDSelect3_4
+{
+ unsigned int get_size () const
+ { return GID_TYPE::static_size * 2 + ranges.get_size (); }
+
+ bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!c->check_struct (this) || !ranges.sanitize (c, nullptr, fdcount) ||
+ (nRanges () == 0) || ranges[0].first != 0))
+ return_trace (false);
+
+ for (unsigned int i = 1; i < nRanges (); i++)
+ if (unlikely (ranges[i - 1].first >= ranges[i].first))
+ return_trace (false);
+
+ if (unlikely (!sentinel().sanitize (c) || (sentinel() != c->get_num_glyphs ())))
+ return_trace (false);
+
+ return_trace (true);
+ }
+
+ static int _cmp_range (const void *_key, const void *_item)
+ {
+ hb_codepoint_t glyph = * (hb_codepoint_t *) _key;
+ FDSelect3_4_Range<GID_TYPE, FD_TYPE> *range = (FDSelect3_4_Range<GID_TYPE, FD_TYPE> *) _item;
+
+ if (glyph < range[0].first) return -1;
+ if (glyph < range[1].first) return 0;
+ return +1;
+ }
+
+ hb_codepoint_t get_fd (hb_codepoint_t glyph) const
+ {
+ auto *range = hb_bsearch (glyph, &ranges[0], nRanges () - 1, sizeof (ranges[0]), _cmp_range);
+ return range ? range->fd : ranges[nRanges () - 1].fd;
+ }
+
+ GID_TYPE &nRanges () { return ranges.len; }
+ GID_TYPE nRanges () const { return ranges.len; }
+ GID_TYPE &sentinel () { return StructAfter<GID_TYPE> (ranges[nRanges () - 1]); }
+ const GID_TYPE &sentinel () const { return StructAfter<GID_TYPE> (ranges[nRanges () - 1]); }
+
+ ArrayOf<FDSelect3_4_Range<GID_TYPE, FD_TYPE>, GID_TYPE> ranges;
+ /* GID_TYPE sentinel */
+
+ DEFINE_SIZE_ARRAY (GID_TYPE::static_size, ranges);
+};
+
+typedef FDSelect3_4<HBUINT16, HBUINT8> FDSelect3;
+typedef FDSelect3_4_Range<HBUINT16, HBUINT8> FDSelect3_Range;
+
+struct FDSelect
+{
+ bool serialize (hb_serialize_context_t *c, const FDSelect &src, unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ unsigned int size = src.get_size (num_glyphs);
+ FDSelect *dest = c->allocate_size<FDSelect> (size, false);
+ if (unlikely (!dest)) return_trace (false);
+ hb_memcpy (dest, &src, size);
+ return_trace (true);
+ }
+
+ unsigned int get_size (unsigned int num_glyphs) const
+ {
+ switch (format)
+ {
+ case 0: return format.static_size + u.format0.get_size (num_glyphs);
+ case 3: return format.static_size + u.format3.get_size ();
+ default:return 0;
+ }
+ }
+
+ hb_codepoint_t get_fd (hb_codepoint_t glyph) const
+ {
+ if (this == &Null (FDSelect)) return 0;
+
+ switch (format)
+ {
+ case 0: return u.format0.get_fd (glyph);
+ case 3: return u.format3.get_fd (glyph);
+ default:return 0;
+ }
+ }
+
+ bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!c->check_struct (this)))
+ return_trace (false);
+
+ switch (format)
+ {
+ case 0: return_trace (u.format0.sanitize (c, fdcount));
+ case 3: return_trace (u.format3.sanitize (c, fdcount));
+ default:return_trace (false);
+ }
+ }
+
+ HBUINT8 format;
+ union {
+ FDSelect0 format0;
+ FDSelect3 format3;
+ } u;
+ public:
+ DEFINE_SIZE_MIN (1);
+};
+
+template <typename COUNT>
+struct Subrs : CFFIndex<COUNT>
+{
+ typedef COUNT count_type;
+ typedef CFFIndex<COUNT> SUPER;
+};
+
+} /* namespace CFF */
+
+#endif /* HB_OT_CFF_COMMON_HH */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 10:54:06 +0000