summaryrefslogtreecommitdiffstats
path: root/gfx/harfbuzz/src/hb-ot-cff2-table.hh
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--gfx/harfbuzz/src/hb-ot-cff2-table.hh541
1 files changed, 541 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-cff2-table.hh b/gfx/harfbuzz/src/hb-ot-cff2-table.hh
new file mode 100644
index 0000000000..9081930bbe
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-ot-cff2-table.hh
@@ -0,0 +1,541 @@
+/*
+ * 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_CFF2_TABLE_HH
+#define HB_OT_CFF2_TABLE_HH
+
+#include "hb-ot-cff-common.hh"
+#include "hb-subset-cff2.hh"
+#include "hb-draw.hh"
+
+namespace CFF {
+
+/*
+ * CFF2 -- Compact Font Format (CFF) Version 2
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/cff2
+ */
+#define HB_OT_TAG_cff2 HB_TAG('C','F','F','2')
+
+typedef CFFIndex<HBUINT32> CFF2Index;
+template <typename Type> struct CFF2IndexOf : CFFIndexOf<HBUINT32, Type> {};
+
+typedef CFF2Index CFF2CharStrings;
+typedef Subrs<HBUINT32> CFF2Subrs;
+
+typedef FDSelect3_4<HBUINT32, HBUINT16> FDSelect4;
+typedef FDSelect3_4_Range<HBUINT32, HBUINT16> FDSelect4_Range;
+
+struct CFF2FDSelect
+{
+ bool serialize (hb_serialize_context_t *c, const CFF2FDSelect &src, unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ unsigned int size = src.get_size (num_glyphs);
+ CFF2FDSelect *dest = c->allocate_size<CFF2FDSelect> (size);
+ 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 ();
+ case 4: return format.static_size + u.format4.get_size ();
+ default:return 0;
+ }
+ }
+
+ hb_codepoint_t get_fd (hb_codepoint_t glyph) const
+ {
+ if (this == &Null (CFF2FDSelect))
+ return 0;
+
+ switch (format)
+ {
+ case 0: return u.format0.get_fd (glyph);
+ case 3: return u.format3.get_fd (glyph);
+ case 4: return u.format4.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));
+ case 4: return_trace (u.format4.sanitize (c, fdcount));
+ default:return_trace (false);
+ }
+ }
+
+ HBUINT8 format;
+ union {
+ FDSelect0 format0;
+ FDSelect3 format3;
+ FDSelect4 format4;
+ } u;
+ public:
+ DEFINE_SIZE_MIN (2);
+};
+
+struct CFF2VariationStore
+{
+ bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (likely (c->check_struct (this)) && c->check_range (&varStore, size) && varStore.sanitize (c));
+ }
+
+ bool serialize (hb_serialize_context_t *c, const CFF2VariationStore *varStore)
+ {
+ TRACE_SERIALIZE (this);
+ unsigned int size_ = varStore->get_size ();
+ CFF2VariationStore *dest = c->allocate_size<CFF2VariationStore> (size_);
+ if (unlikely (!dest)) return_trace (false);
+ hb_memcpy (dest, varStore, size_);
+ return_trace (true);
+ }
+
+ unsigned int get_size () const { return HBUINT16::static_size + size; }
+
+ HBUINT16 size;
+ VariationStore varStore;
+
+ DEFINE_SIZE_MIN (2 + VariationStore::min_size);
+};
+
+struct cff2_top_dict_values_t : top_dict_values_t<>
+{
+ void init ()
+ {
+ top_dict_values_t<>::init ();
+ vstoreOffset = 0;
+ FDSelectOffset = 0;
+ }
+ void fini () { top_dict_values_t<>::fini (); }
+
+ unsigned int vstoreOffset;
+ unsigned int FDSelectOffset;
+};
+
+struct cff2_top_dict_opset_t : top_dict_opset_t<>
+{
+ static void process_op (op_code_t op, num_interp_env_t& env, cff2_top_dict_values_t& dictval)
+ {
+ switch (op) {
+ case OpCode_FontMatrix:
+ {
+ dict_val_t val;
+ val.init ();
+ dictval.add_op (op, env.str_ref);
+ env.clear_args ();
+ }
+ break;
+
+ case OpCode_vstore:
+ dictval.vstoreOffset = env.argStack.pop_uint ();
+ env.clear_args ();
+ break;
+ case OpCode_FDSelect:
+ dictval.FDSelectOffset = env.argStack.pop_uint ();
+ env.clear_args ();
+ break;
+
+ default:
+ SUPER::process_op (op, env, dictval);
+ /* Record this operand below if stack is empty, otherwise done */
+ if (!env.argStack.is_empty ()) return;
+ }
+
+ if (unlikely (env.in_error ())) return;
+
+ dictval.add_op (op, env.str_ref);
+ }
+
+ typedef top_dict_opset_t<> SUPER;
+};
+
+struct cff2_font_dict_values_t : dict_values_t<op_str_t>
+{
+ void init ()
+ {
+ dict_values_t<op_str_t>::init ();
+ privateDictInfo.init ();
+ }
+ void fini () { dict_values_t<op_str_t>::fini (); }
+
+ table_info_t privateDictInfo;
+};
+
+struct cff2_font_dict_opset_t : dict_opset_t
+{
+ static void process_op (op_code_t op, num_interp_env_t& env, cff2_font_dict_values_t& dictval)
+ {
+ switch (op) {
+ case OpCode_Private:
+ dictval.privateDictInfo.offset = env.argStack.pop_uint ();
+ dictval.privateDictInfo.size = env.argStack.pop_uint ();
+ env.clear_args ();
+ break;
+
+ default:
+ SUPER::process_op (op, env);
+ if (!env.argStack.is_empty ())
+ return;
+ }
+
+ if (unlikely (env.in_error ())) return;
+
+ dictval.add_op (op, env.str_ref);
+ }
+
+ private:
+ typedef dict_opset_t SUPER;
+};
+
+template <typename VAL>
+struct cff2_private_dict_values_base_t : dict_values_t<VAL>
+{
+ void init ()
+ {
+ dict_values_t<VAL>::init ();
+ subrsOffset = 0;
+ localSubrs = &Null (CFF2Subrs);
+ ivs = 0;
+ }
+ void fini () { dict_values_t<VAL>::fini (); }
+
+ unsigned int subrsOffset;
+ const CFF2Subrs *localSubrs;
+ unsigned int ivs;
+};
+
+typedef cff2_private_dict_values_base_t<op_str_t> cff2_private_dict_values_subset_t;
+typedef cff2_private_dict_values_base_t<num_dict_val_t> cff2_private_dict_values_t;
+
+struct cff2_priv_dict_interp_env_t : num_interp_env_t
+{
+ cff2_priv_dict_interp_env_t (const hb_ubytes_t &str) :
+ num_interp_env_t (str) {}
+
+ void process_vsindex ()
+ {
+ if (likely (!seen_vsindex))
+ {
+ set_ivs (argStack.pop_uint ());
+ }
+ seen_vsindex = true;
+ }
+
+ unsigned int get_ivs () const { return ivs; }
+ void set_ivs (unsigned int ivs_) { ivs = ivs_; }
+
+ protected:
+ unsigned int ivs = 0;
+ bool seen_vsindex = false;
+};
+
+struct cff2_private_dict_opset_t : dict_opset_t
+{
+ static void process_op (op_code_t op, cff2_priv_dict_interp_env_t& env, cff2_private_dict_values_t& dictval)
+ {
+ num_dict_val_t val;
+ val.init ();
+
+ switch (op) {
+ case OpCode_StdHW:
+ case OpCode_StdVW:
+ case OpCode_BlueScale:
+ case OpCode_BlueShift:
+ case OpCode_BlueFuzz:
+ case OpCode_ExpansionFactor:
+ case OpCode_LanguageGroup:
+ val.single_val = env.argStack.pop_num ();
+ env.clear_args ();
+ break;
+ case OpCode_BlueValues:
+ case OpCode_OtherBlues:
+ case OpCode_FamilyBlues:
+ case OpCode_FamilyOtherBlues:
+ case OpCode_StemSnapH:
+ case OpCode_StemSnapV:
+ env.clear_args ();
+ break;
+ case OpCode_Subrs:
+ dictval.subrsOffset = env.argStack.pop_uint ();
+ env.clear_args ();
+ break;
+ case OpCode_vsindexdict:
+ env.process_vsindex ();
+ dictval.ivs = env.get_ivs ();
+ env.clear_args ();
+ break;
+ case OpCode_blenddict:
+ 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 cff2_private_dict_opset_subset_t : dict_opset_t
+{
+ static void process_op (op_code_t op, cff2_priv_dict_interp_env_t& env, cff2_private_dict_values_subset_t& dictval)
+ {
+ switch (op) {
+ case OpCode_BlueValues:
+ case OpCode_OtherBlues:
+ case OpCode_FamilyBlues:
+ case OpCode_FamilyOtherBlues:
+ case OpCode_StdHW:
+ case OpCode_StdVW:
+ case OpCode_BlueScale:
+ case OpCode_BlueShift:
+ case OpCode_BlueFuzz:
+ case OpCode_StemSnapH:
+ case OpCode_StemSnapV:
+ case OpCode_LanguageGroup:
+ case OpCode_ExpansionFactor:
+ env.clear_args ();
+ break;
+
+ case OpCode_blenddict:
+ env.clear_args ();
+ return;
+
+ case OpCode_Subrs:
+ dictval.subrsOffset = env.argStack.pop_uint ();
+ env.clear_args ();
+ break;
+
+ default:
+ SUPER::process_op (op, env);
+ if (!env.argStack.is_empty ()) return;
+ break;
+ }
+
+ if (unlikely (env.in_error ())) return;
+
+ dictval.add_op (op, env.str_ref);
+ }
+
+ private:
+ typedef dict_opset_t SUPER;
+};
+
+typedef dict_interpreter_t<cff2_top_dict_opset_t, cff2_top_dict_values_t> cff2_top_dict_interpreter_t;
+typedef dict_interpreter_t<cff2_font_dict_opset_t, cff2_font_dict_values_t> cff2_font_dict_interpreter_t;
+
+struct CFF2FDArray : FDArray<HBUINT32>
+{
+ /* FDArray::serialize does not compile without this partial specialization */
+ template <typename ITER, typename OP_SERIALIZER>
+ bool serialize (hb_serialize_context_t *c, ITER it, OP_SERIALIZER& opszr)
+ { return FDArray<HBUINT32>::serialize<cff2_font_dict_values_t, table_info_t> (c, it, opszr); }
+};
+
+} /* namespace CFF */
+
+namespace OT {
+
+using namespace CFF;
+
+struct cff2
+{
+ static constexpr hb_tag_t tableTag = HB_OT_TAG_cff2;
+
+ bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) &&
+ likely (version.major == 2));
+ }
+
+ template <typename PRIVOPSET, typename PRIVDICTVAL>
+ struct accelerator_templ_t
+ {
+ accelerator_templ_t (hb_face_t *face)
+ {
+ topDict.init ();
+ fontDicts.init ();
+ privateDicts.init ();
+
+ this->blob = sc.reference_table<cff2> (face);
+
+ /* setup for run-time santization */
+ sc.init (this->blob);
+ sc.start_processing ();
+
+ const OT::cff2 *cff2 = this->blob->template as<OT::cff2> ();
+
+ if (cff2 == &Null (OT::cff2))
+ goto fail;
+
+ { /* parse top dict */
+ hb_ubytes_t topDictStr = (cff2 + cff2->topDict).as_ubytes (cff2->topDictSize);
+ if (unlikely (!topDictStr.sanitize (&sc))) goto fail;
+ num_interp_env_t env (topDictStr);
+ cff2_top_dict_interpreter_t top_interp (env);
+ topDict.init ();
+ if (unlikely (!top_interp.interpret (topDict))) goto fail;
+ }
+
+ globalSubrs = &StructAtOffset<CFF2Subrs> (cff2, cff2->topDict + cff2->topDictSize);
+ varStore = &StructAtOffsetOrNull<CFF2VariationStore> (cff2, topDict.vstoreOffset);
+ charStrings = &StructAtOffsetOrNull<CFF2CharStrings> (cff2, topDict.charStringsOffset);
+ fdArray = &StructAtOffsetOrNull<CFF2FDArray> (cff2, topDict.FDArrayOffset);
+ fdSelect = &StructAtOffsetOrNull<CFF2FDSelect> (cff2, topDict.FDSelectOffset);
+
+ if (((varStore != &Null (CFF2VariationStore)) && unlikely (!varStore->sanitize (&sc))) ||
+ (charStrings == &Null (CFF2CharStrings)) || unlikely (!charStrings->sanitize (&sc)) ||
+ (globalSubrs == &Null (CFF2Subrs)) || unlikely (!globalSubrs->sanitize (&sc)) ||
+ (fdArray == &Null (CFF2FDArray)) || unlikely (!fdArray->sanitize (&sc)) ||
+ (((fdSelect != &Null (CFF2FDSelect)) && unlikely (!fdSelect->sanitize (&sc, fdArray->count)))))
+ goto fail;
+
+ num_glyphs = charStrings->count;
+ if (num_glyphs != sc.get_num_glyphs ())
+ goto fail;
+
+ fdCount = fdArray->count;
+ if (!privateDicts.resize (fdCount))
+ goto fail;
+
+ /* parse font dicts and gather private dicts */
+ for (unsigned int i = 0; i < fdCount; i++)
+ {
+ const hb_ubytes_t fontDictStr = (*fdArray)[i];
+ if (unlikely (!fontDictStr.sanitize (&sc))) goto fail;
+ cff2_font_dict_values_t *font;
+ num_interp_env_t env (fontDictStr);
+ cff2_font_dict_interpreter_t font_interp (env);
+ font = fontDicts.push ();
+ if (unlikely (font == &Crap (cff2_font_dict_values_t))) goto fail;
+ font->init ();
+ if (unlikely (!font_interp.interpret (*font))) goto fail;
+
+ const hb_ubytes_t privDictStr = StructAtOffsetOrNull<UnsizedByteStr> (cff2, font->privateDictInfo.offset).as_ubytes (font->privateDictInfo.size);
+ if (unlikely (!privDictStr.sanitize (&sc))) goto fail;
+ cff2_priv_dict_interp_env_t env2 (privDictStr);
+ dict_interpreter_t<PRIVOPSET, PRIVDICTVAL, cff2_priv_dict_interp_env_t> priv_interp (env2);
+ privateDicts[i].init ();
+ if (unlikely (!priv_interp.interpret (privateDicts[i]))) goto fail;
+
+ privateDicts[i].localSubrs = &StructAtOffsetOrNull<CFF2Subrs> (&privDictStr[0], privateDicts[i].subrsOffset);
+ if (privateDicts[i].localSubrs != &Null (CFF2Subrs) &&
+ unlikely (!privateDicts[i].localSubrs->sanitize (&sc)))
+ goto fail;
+ }
+
+
+ return;
+
+ fail:
+ _fini ();
+ }
+ ~accelerator_templ_t () { _fini (); }
+ void _fini ()
+ {
+ sc.end_processing ();
+ topDict.fini ();
+ fontDicts.fini ();
+ privateDicts.fini ();
+ hb_blob_destroy (blob);
+ blob = nullptr;
+ }
+
+ hb_map_t *create_glyph_to_sid_map () const
+ {
+ return nullptr;
+ }
+
+ bool is_valid () const { return blob; }
+
+ protected:
+ hb_sanitize_context_t sc;
+
+ public:
+ hb_blob_t *blob = nullptr;
+ cff2_top_dict_values_t topDict;
+ const CFF2Subrs *globalSubrs = nullptr;
+ const CFF2VariationStore *varStore = nullptr;
+ const CFF2CharStrings *charStrings = nullptr;
+ const CFF2FDArray *fdArray = nullptr;
+ const CFF2FDSelect *fdSelect = nullptr;
+ unsigned int fdCount = 0;
+
+ hb_vector_t<cff2_font_dict_values_t> fontDicts;
+ hb_vector_t<PRIVDICTVAL> privateDicts;
+
+ unsigned int num_glyphs = 0;
+ };
+
+ struct accelerator_t : accelerator_templ_t<cff2_private_dict_opset_t, cff2_private_dict_values_t>
+ {
+ accelerator_t (hb_face_t *face) : accelerator_templ_t (face) {}
+
+ HB_INTERNAL bool get_extents (hb_font_t *font,
+ hb_codepoint_t glyph,
+ hb_glyph_extents_t *extents) const;
+ HB_INTERNAL bool get_path (hb_font_t *font, hb_codepoint_t glyph, hb_draw_session_t &draw_session) const;
+ };
+
+ typedef accelerator_templ_t<cff2_private_dict_opset_subset_t, cff2_private_dict_values_subset_t> accelerator_subset_t;
+
+ bool subset (hb_subset_context_t *c) const { return hb_subset_cff2 (c); }
+
+ public:
+ FixedVersion<HBUINT8> version; /* Version of CFF2 table. set to 0x0200u */
+ NNOffsetTo<TopDict, HBUINT8> topDict; /* headerSize = Offset to Top DICT. */
+ HBUINT16 topDictSize; /* Top DICT size */
+
+ public:
+ DEFINE_SIZE_STATIC (5);
+};
+
+struct cff2_accelerator_t : cff2::accelerator_t {
+ cff2_accelerator_t (hb_face_t *face) : cff2::accelerator_t (face) {}
+};
+
+} /* namespace OT */
+
+#endif /* HB_OT_CFF2_TABLE_HH */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 15:41:47 +0000