Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 282 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/hb-cff2-interp-cs.hh b/gfx/harfbuzz/src/hb-cff2-interp-cs.hh
new file mode 100644
index 0000000000..915b10cf39
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-cff2-interp-cs.hh
@@ -0,0 +1,282 @@
+/*
+ * 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_CFF2_INTERP_CS_HH
+#define HB_CFF2_INTERP_CS_HH
+
+#include "hb.hh"
+#include "hb-cff-interp-cs-common.hh"
+
+namespace CFF {
+
+using namespace OT;
+
+struct blend_arg_t : number_t
+{
+  void set_int (int v) { reset_blends (); number_t::set_int (v); }
+  void set_fixed (int32_t v) { reset_blends (); number_t::set_fixed (v); }
+  void set_real (double v) { reset_blends (); number_t::set_real (v); }
+
+  void set_blends (unsigned int numValues_, unsigned int valueIndex_,
+		   hb_array_t<const blend_arg_t> blends_)
+  {
+    numValues = numValues_;
+    valueIndex = valueIndex_;
+    unsigned numBlends = blends_.length;
+    if (unlikely (!deltas.resize_exact (numBlends)))
+      return;
+    for (unsigned int i = 0; i < numBlends; i++)
+      deltas.arrayZ[i] = blends_.arrayZ[i];
+  }
+
+  bool blending () const { return deltas.length > 0; }
+  void reset_blends ()
+  {
+    numValues = valueIndex = 0;
+    deltas.shrink (0);
+  }
+
+  unsigned int numValues;
+  unsigned int valueIndex;
+  hb_vector_t<number_t> deltas;
+};
+
+typedef biased_subrs_t<CFF2Subrs>   cff2_biased_subrs_t;
+
+template <typename ELEM>
+struct cff2_cs_interp_env_t : cs_interp_env_t<ELEM, CFF2Subrs>
+{
+  template <typename ACC>
+  cff2_cs_interp_env_t (const hb_ubytes_t &str, ACC &acc, unsigned int fd,
+			const int *coords_=nullptr, unsigned int num_coords_=0)
+    : SUPER (str, acc.globalSubrs, acc.privateDicts[fd].localSubrs)
+  {
+    coords = coords_;
+    num_coords = num_coords_;
+    varStore = acc.varStore;
+    seen_blend = false;
+    seen_vsindex_ = false;
+    scalars.init ();
+    do_blend = num_coords && coords && varStore->size;
+    set_ivs (acc.privateDicts[fd].ivs);
+  }
+
+  void fini ()
+  {
+    scalars.fini ();
+    SUPER::fini ();
+  }
+
+  op_code_t fetch_op ()
+  {
+    if (this->str_ref.avail ())
+      return SUPER::fetch_op ();
+
+    /* make up return or endchar op */
+    if (this->callStack.is_empty ())
+      return OpCode_endchar;
+    else
+      return OpCode_return;
+  }
+
+  const ELEM& eval_arg (unsigned int i)
+  {
+    return SUPER::argStack[i];
+  }
+
+  const ELEM& pop_arg ()
+  {
+    return SUPER::argStack.pop ();
+  }
+
+  void process_blend ()
+  {
+    if (!seen_blend)
+    {
+      region_count = varStore->varStore.get_region_index_count (get_ivs ());
+      if (do_blend)
+      {
+	if (unlikely (!scalars.resize_exact (region_count)))
+	  SUPER::set_error ();
+	else
+	  varStore->varStore.get_region_scalars (get_ivs (), coords, num_coords,
+						 &scalars[0], region_count);
+      }
+      seen_blend = true;
+    }
+  }
+
+  void process_vsindex ()
+  {
+    unsigned int  index = SUPER::argStack.pop_uint ();
+    if (unlikely (seen_vsindex () || seen_blend))
+    {
+     SUPER::set_error ();
+    }
+    else
+    {
+      set_ivs (index);
+    }
+    seen_vsindex_ = true;
+  }
+
+  unsigned int get_region_count () const { return region_count; }
+  void	 set_region_count (unsigned int region_count_) { region_count = region_count_; }
+  unsigned int get_ivs () const { return ivs; }
+  void	 set_ivs (unsigned int ivs_) { ivs = ivs_; }
+  bool	 seen_vsindex () const { return seen_vsindex_; }
+
+  double blend_deltas (hb_array_t<const ELEM> deltas) const
+  {
+    double v = 0;
+    if (do_blend)
+    {
+      if (likely (scalars.length == deltas.length))
+      {
+        unsigned count = scalars.length;
+	for (unsigned i = 0; i < count; i++)
+	  v += (double) scalars.arrayZ[i] * deltas.arrayZ[i].to_real ();
+      }
+    }
+    return v;
+  }
+
+  bool have_coords () const { return num_coords; }
+
+  protected:
+  const int     *coords;
+  unsigned int  num_coords;
+  const	 CFF2VariationStore *varStore;
+  unsigned int  region_count;
+  unsigned int  ivs;
+  hb_vector_t<float>  scalars;
+  bool	  do_blend;
+  bool	  seen_vsindex_;
+  bool	  seen_blend;
+
+  typedef cs_interp_env_t<ELEM, CFF2Subrs> SUPER;
+};
+template <typename OPSET, typename PARAM, typename ELEM, typename PATH=path_procs_null_t<cff2_cs_interp_env_t<ELEM>, PARAM>>
+struct cff2_cs_opset_t : cs_opset_t<ELEM, OPSET, cff2_cs_interp_env_t<ELEM>, PARAM, PATH>
+{
+  static void process_op (op_code_t op, cff2_cs_interp_env_t<ELEM> &env, PARAM& param)
+  {
+    switch (op) {
+      case OpCode_callsubr:
+      case OpCode_callgsubr:
+	/* a subroutine number shouldn't be a blended value */
+#if 0
+	if (unlikely (env.argStack.peek ().blending ()))
+	{
+	  env.set_error ();
+	  break;
+	}
+#endif
+	SUPER::process_op (op, env, param);
+	break;
+
+      case OpCode_blendcs:
+	OPSET::process_blend (env, param);
+	break;
+
+      case OpCode_vsindexcs:
+#if 0
+	if (unlikely (env.argStack.peek ().blending ()))
+	{
+	  env.set_error ();
+	  break;
+	}
+#endif
+	OPSET::process_vsindex (env, param);
+	break;
+
+      default:
+	SUPER::process_op (op, env, param);
+    }
+  }
+
+  template <typename T = ELEM,
+	    hb_enable_if (hb_is_same (T, blend_arg_t))>
+  static void process_arg_blend (cff2_cs_interp_env_t<ELEM> &env,
+				 ELEM &arg,
+				 const hb_array_t<const ELEM> blends,
+				 unsigned n, unsigned i)
+  {
+    if (env.have_coords ())
+      arg.set_int (round (arg.to_real () + env.blend_deltas (blends)));
+    else
+      arg.set_blends (n, i, blends);
+  }
+  template <typename T = ELEM,
+	    hb_enable_if (!hb_is_same (T, blend_arg_t))>
+  static void process_arg_blend (cff2_cs_interp_env_t<ELEM> &env,
+				 ELEM &arg,
+				 const hb_array_t<const ELEM> blends,
+				 unsigned n, unsigned i)
+  {
+    arg.set_real (arg.to_real () + env.blend_deltas (blends));
+  }
+
+  static void process_blend (cff2_cs_interp_env_t<ELEM> &env, PARAM& param)
+  {
+    unsigned int n, k;
+
+    env.process_blend ();
+    k = env.get_region_count ();
+    n = env.argStack.pop_uint ();
+    /* copy the blend values into blend array of the default values */
+    unsigned int start = env.argStack.get_count () - ((k+1) * n);
+    /* let an obvious error case fail, but note CFF2 spec doesn't forbid n==0 */
+    if (unlikely (start > env.argStack.get_count ()))
+    {
+      env.set_error ();
+      return;
+    }
+    for (unsigned int i = 0; i < n; i++)
+    {
+      const hb_array_t<const ELEM> blends = env.argStack.sub_array (start + n + (i * k), k);
+      process_arg_blend (env, env.argStack[start + i], blends, n, i);
+    }
+
+    /* pop off blend values leaving default values now adorned with blend values */
+    env.argStack.pop (k * n);
+  }
+
+  static void process_vsindex (cff2_cs_interp_env_t<ELEM> &env, PARAM& param)
+  {
+    env.process_vsindex ();
+    env.clear_args ();
+  }
+
+  private:
+  typedef cs_opset_t<ELEM, OPSET, cff2_cs_interp_env_t<ELEM>, PARAM, PATH>  SUPER;
+};
+
+template <typename OPSET, typename PARAM, typename ELEM>
+using cff2_cs_interpreter_t = cs_interpreter_t<cff2_cs_interp_env_t<ELEM>, OPSET, PARAM>;
+
+} /* namespace CFF */
+
+#endif /* HB_CFF2_INTERP_CS_HH */