summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-cff-interp-dict-common.hh
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-cff-interp-dict-common.hh')
-rw-r--r--Build/source/libs/harfbuzz/harfbuzz-src/src/hb-cff-interp-dict-common.hh294
1 files changed, 294 insertions, 0 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-cff-interp-dict-common.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-cff-interp-dict-common.hh
new file mode 100644
index 00000000000..8000d76b8bd
--- /dev/null
+++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-cff-interp-dict-common.hh
@@ -0,0 +1,294 @@
+/*
+ * 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_CFF_INTERP_DICT_COMMON_HH
+#define HB_CFF_INTERP_DICT_COMMON_HH
+
+#include "hb-cff-interp-common.hh"
+#include <math.h>
+#include <float.h>
+
+namespace CFF {
+
+using namespace OT;
+
+/* an opstr and the parsed out dict value(s) */
+struct DictVal : OpStr
+{
+ void init () { single_val.set_int (0); }
+ void fini () {}
+
+ Number single_val;
+};
+
+typedef DictVal NumDictVal;
+
+template <typename VAL> struct DictValues : ParsedValues<VAL> {};
+
+template <typename OPSTR=OpStr>
+struct TopDictValues : DictValues<OPSTR>
+{
+ void init ()
+ {
+ DictValues<OPSTR>::init ();
+ charStringsOffset = 0;
+ FDArrayOffset = 0;
+ }
+ void fini () { DictValues<OPSTR>::fini (); }
+
+ unsigned int calculate_serialized_op_size (const OPSTR& opstr) const
+ {
+ switch (opstr.op)
+ {
+ case OpCode_CharStrings:
+ case OpCode_FDArray:
+ return OpCode_Size (OpCode_longintdict) + 4 + OpCode_Size (opstr.op);
+
+ default:
+ return opstr.str.len;
+ }
+ }
+
+ unsigned int charStringsOffset;
+ unsigned int FDArrayOffset;
+};
+
+struct DictOpSet : OpSet<Number>
+{
+ static void process_op (OpCode op, InterpEnv<Number>& env)
+ {
+ switch (op) {
+ case OpCode_longintdict: /* 5-byte integer */
+ env.argStack.push_longint_from_substr (env.substr);
+ break;
+
+ case OpCode_BCD: /* real number */
+ env.argStack.push_real (parse_bcd (env.substr));
+ break;
+
+ default:
+ OpSet<Number>::process_op (op, env);
+ break;
+ }
+ }
+
+ static double parse_bcd (SubByteStr& substr)
+ {
+ bool neg = false;
+ double int_part = 0;
+ uint64_t frac_part = 0;
+ uint32_t frac_count = 0;
+ bool exp_neg = false;
+ uint32_t exp_part = 0;
+ bool exp_overflow = false;
+ enum Part { INT_PART=0, FRAC_PART, EXP_PART } part = INT_PART;
+ enum Nibble { DECIMAL=10, EXP_POS, EXP_NEG, RESERVED, NEG, END };
+ const uint64_t MAX_FRACT = 0xFFFFFFFFFFFFFull; /* 1^52-1 */
+ const uint32_t MAX_EXP = 0x7FFu; /* 1^11-1 */
+
+ double value = 0.0;
+ unsigned char byte = 0;
+ for (uint32_t i = 0;; i++)
+ {
+ char d;
+ if ((i & 1) == 0)
+ {
+ if (!substr.avail ())
+ {
+ substr.set_error ();
+ return 0.0;
+ }
+ byte = substr[0];
+ substr.inc ();
+ d = byte >> 4;
+ }
+ else
+ d = byte & 0x0F;
+
+ switch (d)
+ {
+ case RESERVED:
+ substr.set_error ();
+ return value;
+
+ case END:
+ value = (double)(neg? -int_part: int_part);
+ if (frac_count > 0)
+ {
+ double frac = (frac_part / pow (10.0, (double)frac_count));
+ if (neg) frac = -frac;
+ value += frac;
+ }
+ if (unlikely (exp_overflow))
+ {
+ if (value == 0.0)
+ return value;
+ if (exp_neg)
+ return neg? -DBL_MIN: DBL_MIN;
+ else
+ return neg? -DBL_MAX: DBL_MAX;
+ }
+ if (exp_part != 0)
+ {
+ if (exp_neg)
+ value /= pow (10.0, (double)exp_part);
+ else
+ value *= pow (10.0, (double)exp_part);
+ }
+ return value;
+
+ case NEG:
+ if (i != 0)
+ {
+ substr.set_error ();
+ return 0.0;
+ }
+ neg = true;
+ break;
+
+ case DECIMAL:
+ if (part != INT_PART)
+ {
+ substr.set_error ();
+ return value;
+ }
+ part = FRAC_PART;
+ break;
+
+ case EXP_NEG:
+ exp_neg = true;
+ HB_FALLTHROUGH;
+
+ case EXP_POS:
+ if (part == EXP_PART)
+ {
+ substr.set_error ();
+ return value;
+ }
+ part = EXP_PART;
+ break;
+
+ default:
+ switch (part) {
+ default:
+ case INT_PART:
+ int_part = (int_part * 10) + d;
+ break;
+
+ case FRAC_PART:
+ if (likely (frac_part <= MAX_FRACT / 10))
+ {
+ frac_part = (frac_part * 10) + (unsigned)d;
+ frac_count++;
+ }
+ break;
+
+ case EXP_PART:
+ if (likely (exp_part * 10 + d <= MAX_EXP))
+ {
+ exp_part = (exp_part * 10) + d;
+ }
+ else
+ exp_overflow = true;
+ break;
+ }
+ }
+ }
+
+ return value;
+ }
+
+ static bool is_hint_op (OpCode op)
+ {
+ 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:
+ return true;
+ default:
+ return false;
+ }
+ }
+};
+
+template <typename VAL=OpStr>
+struct TopDictOpSet : DictOpSet
+{
+ static void process_op (OpCode op, InterpEnv<Number>& env, TopDictValues<VAL> & dictval)
+ {
+ switch (op) {
+ case OpCode_CharStrings:
+ dictval.charStringsOffset = env.argStack.pop_uint ();
+ env.clear_args ();
+ break;
+ case OpCode_FDArray:
+ dictval.FDArrayOffset = env.argStack.pop_uint ();
+ env.clear_args ();
+ break;
+ case OpCode_FontMatrix:
+ env.clear_args ();
+ break;
+ default:
+ DictOpSet::process_op (op, env);
+ break;
+ }
+ }
+};
+
+template <typename OPSET, typename PARAM, typename ENV=NumInterpEnv>
+struct DictInterpreter : Interpreter<ENV>
+{
+ bool interpret (PARAM& param)
+ {
+ param.init ();
+ while (SUPER::env.substr.avail ())
+ {
+ OPSET::process_op (SUPER::env.fetch_op (), SUPER::env, param);
+ if (unlikely (SUPER::env.in_error ()))
+ return false;
+ }
+
+ return true;
+ }
+
+ private:
+ typedef Interpreter<ENV> SUPER;
+};
+
+} /* namespace CFF */
+
+#endif /* HB_CFF_INTERP_DICT_COMMON_HH */