Add m-esr52 at 52.6.0

1 files changed, 585 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/hb-shape-plan.cc b/gfx/harfbuzz/src/hb-shape-plan.cc
new file mode 100644
index 000000000..600faaeb1
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-shape-plan.cc
@@ -0,0 +1,585 @@
+/*
+ * Copyright © 2012  Google, 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.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#include "hb-shape-plan-private.hh"
+#include "hb-shaper-private.hh"
+#include "hb-font-private.hh"
+#include "hb-buffer-private.hh"
+
+
+#ifndef HB_DEBUG_SHAPE_PLAN
+#define HB_DEBUG_SHAPE_PLAN (HB_DEBUG+0)
+#endif
+
+
+#define HB_SHAPER_IMPLEMENT(shaper) \
+	HB_SHAPER_DATA_ENSURE_DECLARE(shaper, face) \
+	HB_SHAPER_DATA_ENSURE_DECLARE(shaper, font)
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+
+
+static void
+hb_shape_plan_plan (hb_shape_plan_t    *shape_plan,
+		    const hb_feature_t *user_features,
+		    unsigned int        num_user_features,
+		    const int          *coords,
+		    unsigned int        num_coords,
+		    const char * const *shaper_list)
+{
+  DEBUG_MSG_FUNC (SHAPE_PLAN, shape_plan,
+		  "num_features=%d num_coords=%d shaper_list=%p",
+		  num_user_features,
+		  num_coords,
+		  shaper_list);
+
+  const hb_shaper_pair_t *shapers = _hb_shapers_get ();
+
+#define HB_SHAPER_PLAN(shaper) \
+	HB_STMT_START { \
+	  if (hb_##shaper##_shaper_face_data_ensure (shape_plan->face_unsafe)) { \
+	    HB_SHAPER_DATA (shaper, shape_plan) = \
+	      HB_SHAPER_DATA_CREATE_FUNC (shaper, shape_plan) (shape_plan, \
+							       user_features, num_user_features, \
+							       coords, num_coords); \
+	    shape_plan->shaper_func = _hb_##shaper##_shape; \
+	    shape_plan->shaper_name = #shaper; \
+	    return; \
+	  } \
+	} HB_STMT_END
+
+  if (likely (!shaper_list)) {
+    for (unsigned int i = 0; i < HB_SHAPERS_COUNT; i++)
+      if (0)
+	;
+#define HB_SHAPER_IMPLEMENT(shaper) \
+      else if (shapers[i].func == _hb_##shaper##_shape) \
+	HB_SHAPER_PLAN (shaper);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+  } else {
+    for (; *shaper_list; shaper_list++)
+      if (0)
+	;
+#define HB_SHAPER_IMPLEMENT(shaper) \
+      else if (0 == strcmp (*shaper_list, #shaper)) \
+	HB_SHAPER_PLAN (shaper);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+  }
+
+#undef HB_SHAPER_PLAN
+}
+
+
+/*
+ * hb_shape_plan_t
+ */
+
+/**
+ * hb_shape_plan_create: (Xconstructor)
+ * @face: 
+ * @props: 
+ * @user_features: (array length=num_user_features):
+ * @num_user_features: 
+ * @shaper_list: (array zero-terminated=1):
+ *
+ * 
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 0.9.7
+ **/
+hb_shape_plan_t *
+hb_shape_plan_create (hb_face_t                     *face,
+		      const hb_segment_properties_t *props,
+		      const hb_feature_t            *user_features,
+		      unsigned int                   num_user_features,
+		      const char * const            *shaper_list)
+{
+  return hb_shape_plan_create2 (face, props,
+				user_features, num_user_features,
+				NULL, 0,
+				shaper_list);
+}
+
+hb_shape_plan_t *
+hb_shape_plan_create2 (hb_face_t                     *face,
+		       const hb_segment_properties_t *props,
+		       const hb_feature_t            *user_features,
+		       unsigned int                   num_user_features,
+		       const int                     *orig_coords,
+		       unsigned int                   num_coords,
+		       const char * const            *shaper_list)
+{
+  DEBUG_MSG_FUNC (SHAPE_PLAN, NULL,
+		  "face=%p num_features=%d num_coords=%d shaper_list=%p",
+		  face,
+		  num_user_features,
+		  num_coords,
+		  shaper_list);
+
+  hb_shape_plan_t *shape_plan;
+  hb_feature_t *features = NULL;
+  int *coords = NULL;
+
+  if (unlikely (!face))
+    face = hb_face_get_empty ();
+  if (unlikely (!props))
+    return hb_shape_plan_get_empty ();
+  if (num_user_features && !(features = (hb_feature_t *) calloc (num_user_features, sizeof (hb_feature_t))))
+    return hb_shape_plan_get_empty ();
+  if (num_coords && !(coords = (int *) calloc (num_coords, sizeof (int))))
+  {
+    free (features);
+    return hb_shape_plan_get_empty ();
+  }
+  if (!(shape_plan = hb_object_create<hb_shape_plan_t> ()))
+  {
+    free (coords);
+    free (features);
+    return hb_shape_plan_get_empty ();
+  }
+
+  assert (props->direction != HB_DIRECTION_INVALID);
+
+  hb_face_make_immutable (face);
+  shape_plan->default_shaper_list = shaper_list == NULL;
+  shape_plan->face_unsafe = face;
+  shape_plan->props = *props;
+  shape_plan->num_user_features = num_user_features;
+  shape_plan->user_features = features;
+  if (num_user_features)
+    memcpy (features, user_features, num_user_features * sizeof (hb_feature_t));
+  shape_plan->num_coords = num_coords;
+  shape_plan->coords = coords;
+  if (num_coords)
+    memcpy (coords, orig_coords, num_coords * sizeof (int));
+
+  hb_shape_plan_plan (shape_plan,
+		      user_features, num_user_features,
+		      coords, num_coords,
+		      shaper_list);
+
+  return shape_plan;
+}
+
+/**
+ * hb_shape_plan_get_empty:
+ *
+ * 
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 0.9.7
+ **/
+hb_shape_plan_t *
+hb_shape_plan_get_empty (void)
+{
+  static const hb_shape_plan_t _hb_shape_plan_nil = {
+    HB_OBJECT_HEADER_STATIC,
+
+    true, /* default_shaper_list */
+    NULL, /* face */
+    HB_SEGMENT_PROPERTIES_DEFAULT, /* props */
+
+    NULL, /* shaper_func */
+    NULL, /* shaper_name */
+
+    NULL, /* user_features */
+    0,    /* num_user_featurs */
+
+    NULL, /* coords */
+    0,    /* num_coords */
+
+    {
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+    }
+  };
+
+  return const_cast<hb_shape_plan_t *> (&_hb_shape_plan_nil);
+}
+
+/**
+ * hb_shape_plan_reference: (skip)
+ * @shape_plan: a shape plan.
+ *
+ * 
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 0.9.7
+ **/
+hb_shape_plan_t *
+hb_shape_plan_reference (hb_shape_plan_t *shape_plan)
+{
+  return hb_object_reference (shape_plan);
+}
+
+/**
+ * hb_shape_plan_destroy: (skip)
+ * @shape_plan: a shape plan.
+ *
+ * 
+ *
+ * Since: 0.9.7
+ **/
+void
+hb_shape_plan_destroy (hb_shape_plan_t *shape_plan)
+{
+  if (!hb_object_destroy (shape_plan)) return;
+
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, shape_plan);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+
+  free (shape_plan->user_features);
+  free (shape_plan->coords);
+
+  free (shape_plan);
+}
+
+/**
+ * hb_shape_plan_set_user_data: (skip)
+ * @shape_plan: a shape plan.
+ * @key: 
+ * @data: 
+ * @destroy: 
+ * @replace: 
+ *
+ * 
+ *
+ * Return value: 
+ *
+ * Since: 0.9.7
+ **/
+hb_bool_t
+hb_shape_plan_set_user_data (hb_shape_plan_t    *shape_plan,
+			     hb_user_data_key_t *key,
+			     void *              data,
+			     hb_destroy_func_t   destroy,
+			     hb_bool_t           replace)
+{
+  return hb_object_set_user_data (shape_plan, key, data, destroy, replace);
+}
+
+/**
+ * hb_shape_plan_get_user_data: (skip)
+ * @shape_plan: a shape plan.
+ * @key: 
+ *
+ * 
+ *
+ * Return value: (transfer none):
+ *
+ * Since: 0.9.7
+ **/
+void *
+hb_shape_plan_get_user_data (hb_shape_plan_t    *shape_plan,
+			     hb_user_data_key_t *key)
+{
+  return hb_object_get_user_data (shape_plan, key);
+}
+
+
+/**
+ * hb_shape_plan_execute:
+ * @shape_plan: a shape plan.
+ * @font: a font.
+ * @buffer: a buffer.
+ * @features: (array length=num_features):
+ * @num_features: 
+ *
+ * 
+ *
+ * Return value: 
+ *
+ * Since: 0.9.7
+ **/
+hb_bool_t
+hb_shape_plan_execute (hb_shape_plan_t    *shape_plan,
+		       hb_font_t          *font,
+		       hb_buffer_t        *buffer,
+		       const hb_feature_t *features,
+		       unsigned int        num_features)
+{
+  DEBUG_MSG_FUNC (SHAPE_PLAN, shape_plan,
+		  "num_features=%d shaper_func=%p, shaper_name=%s",
+		  num_features,
+		  shape_plan->shaper_func,
+		  shape_plan->shaper_name);
+
+  if (unlikely (!buffer->len))
+    return true;
+
+  assert (!hb_object_is_inert (buffer));
+  assert (buffer->content_type == HB_BUFFER_CONTENT_TYPE_UNICODE);
+
+  if (unlikely (hb_object_is_inert (shape_plan)))
+    return false;
+
+  assert (shape_plan->face_unsafe == font->face);
+  assert (hb_segment_properties_equal (&shape_plan->props, &buffer->props));
+
+#define HB_SHAPER_EXECUTE(shaper) \
+	HB_STMT_START { \
+	  return HB_SHAPER_DATA (shaper, shape_plan) && \
+		 hb_##shaper##_shaper_font_data_ensure (font) && \
+		 _hb_##shaper##_shape (shape_plan, font, buffer, features, num_features); \
+	} HB_STMT_END
+
+  if (0)
+    ;
+#define HB_SHAPER_IMPLEMENT(shaper) \
+  else if (shape_plan->shaper_func == _hb_##shaper##_shape) \
+    HB_SHAPER_EXECUTE (shaper);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+
+#undef HB_SHAPER_EXECUTE
+
+  return false;
+}
+
+
+/*
+ * caching
+ */
+
+#if 0
+static unsigned int
+hb_shape_plan_hash (const hb_shape_plan_t *shape_plan)
+{
+  return hb_segment_properties_hash (&shape_plan->props) +
+	 shape_plan->default_shaper_list ? 0 : (intptr_t) shape_plan->shaper_func;
+}
+#endif
+
+/* User-feature caching is currently somewhat dumb:
+ * it only finds matches where the feature array is identical,
+ * not cases where the feature lists would be compatible for plan purposes
+ * but have different ranges, for example.
+ */
+struct hb_shape_plan_proposal_t
+{
+  const hb_segment_properties_t  props;
+  const char * const            *shaper_list;
+  const hb_feature_t            *user_features;
+  unsigned int                   num_user_features;
+  const int                     *coords;
+  unsigned int                   num_coords;
+  hb_shape_func_t               *shaper_func;
+};
+
+static inline hb_bool_t
+hb_shape_plan_user_features_match (const hb_shape_plan_t          *shape_plan,
+				   const hb_shape_plan_proposal_t *proposal)
+{
+  if (proposal->num_user_features != shape_plan->num_user_features)
+    return false;
+  for (unsigned int i = 0, n = proposal->num_user_features; i < n; i++)
+    if (proposal->user_features[i].tag   != shape_plan->user_features[i].tag   ||
+        proposal->user_features[i].value != shape_plan->user_features[i].value ||
+        proposal->user_features[i].start != shape_plan->user_features[i].start ||
+        proposal->user_features[i].end   != shape_plan->user_features[i].end)
+      return false;
+  return true;
+}
+
+static inline hb_bool_t
+hb_shape_plan_coords_match (const hb_shape_plan_t          *shape_plan,
+			    const hb_shape_plan_proposal_t *proposal)
+{
+  if (proposal->num_coords != shape_plan->num_coords)
+    return false;
+  for (unsigned int i = 0, n = proposal->num_coords; i < n; i++)
+    if (proposal->coords[i] != shape_plan->coords[i])
+      return false;
+  return true;
+}
+
+static hb_bool_t
+hb_shape_plan_matches (const hb_shape_plan_t          *shape_plan,
+		       const hb_shape_plan_proposal_t *proposal)
+{
+  return hb_segment_properties_equal (&shape_plan->props, &proposal->props) &&
+	 hb_shape_plan_user_features_match (shape_plan, proposal) &&
+	 hb_shape_plan_coords_match (shape_plan, proposal) &&
+	 ((shape_plan->default_shaper_list && proposal->shaper_list == NULL) ||
+	  (shape_plan->shaper_func == proposal->shaper_func));
+}
+
+static inline hb_bool_t
+hb_non_global_user_features_present (const hb_feature_t *user_features,
+				     unsigned int        num_user_features)
+{
+  while (num_user_features)
+    if (user_features->start != 0 || user_features->end != (unsigned int) -1)
+      return true;
+    else
+      num_user_features--, user_features++;
+  return false;
+}
+
+static inline hb_bool_t
+hb_coords_present (const int *coords,
+		   unsigned int num_coords)
+{
+  return num_coords != 0;
+}
+
+/**
+ * hb_shape_plan_create_cached:
+ * @face: 
+ * @props: 
+ * @user_features: (array length=num_user_features):
+ * @num_user_features: 
+ * @shaper_list: (array zero-terminated=1):
+ *
+ * 
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 0.9.7
+ **/
+hb_shape_plan_t *
+hb_shape_plan_create_cached (hb_face_t                     *face,
+			     const hb_segment_properties_t *props,
+			     const hb_feature_t            *user_features,
+			     unsigned int                   num_user_features,
+			     const char * const            *shaper_list)
+{
+  return hb_shape_plan_create_cached2 (face, props,
+				       user_features, num_user_features,
+				       NULL, 0,
+				       shaper_list);
+}
+
+hb_shape_plan_t *
+hb_shape_plan_create_cached2 (hb_face_t                     *face,
+			      const hb_segment_properties_t *props,
+			      const hb_feature_t            *user_features,
+			      unsigned int                   num_user_features,
+			      const int                     *coords,
+			      unsigned int                   num_coords,
+			      const char * const            *shaper_list)
+{
+  DEBUG_MSG_FUNC (SHAPE_PLAN, NULL,
+		  "face=%p num_features=%d shaper_list=%p",
+		  face,
+		  num_user_features,
+		  shaper_list);
+
+  hb_shape_plan_proposal_t proposal = {
+    *props,
+    shaper_list,
+    user_features,
+    num_user_features,
+    NULL
+  };
+
+  if (shaper_list) {
+    /* Choose shaper.  Adapted from hb_shape_plan_plan().
+     * Must choose shaper exactly the same way as that function. */
+    for (const char * const *shaper_item = shaper_list; *shaper_item; shaper_item++)
+      if (0)
+	;
+#define HB_SHAPER_IMPLEMENT(shaper) \
+      else if (0 == strcmp (*shaper_item, #shaper) && \
+	       hb_##shaper##_shaper_face_data_ensure (face)) \
+      { \
+	proposal.shaper_func = _hb_##shaper##_shape; \
+	break; \
+      }
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+
+    if (unlikely (!proposal.shaper_func))
+      return hb_shape_plan_get_empty ();
+  }
+
+
+retry:
+  hb_face_t::plan_node_t *cached_plan_nodes = (hb_face_t::plan_node_t *) hb_atomic_ptr_get (&face->shape_plans);
+  for (hb_face_t::plan_node_t *node = cached_plan_nodes; node; node = node->next)
+    if (hb_shape_plan_matches (node->shape_plan, &proposal))
+    {
+      DEBUG_MSG_FUNC (SHAPE_PLAN, node->shape_plan, "fulfilled from cache");
+      return hb_shape_plan_reference (node->shape_plan);
+    }
+
+  /* Not found. */
+
+  hb_shape_plan_t *shape_plan = hb_shape_plan_create2 (face, props,
+						       user_features, num_user_features,
+						       coords, num_coords,
+						       shaper_list);
+
+  /* Don't add to the cache if face is inert. */
+  if (unlikely (hb_object_is_inert (face)))
+    return shape_plan;
+
+  /* Don't add the plan to the cache if there were user features with non-global ranges */
+  if (hb_non_global_user_features_present (user_features, num_user_features))
+    return shape_plan;
+  /* Don't add the plan to the cache if there were variation coordinates XXX Fix me. */
+  if (hb_coords_present (coords, num_coords))
+    return shape_plan;
+
+  hb_face_t::plan_node_t *node = (hb_face_t::plan_node_t *) calloc (1, sizeof (hb_face_t::plan_node_t));
+  if (unlikely (!node))
+    return shape_plan;
+
+  node->shape_plan = shape_plan;
+  node->next = cached_plan_nodes;
+
+  if (!hb_atomic_ptr_cmpexch (&face->shape_plans, cached_plan_nodes, node)) {
+    hb_shape_plan_destroy (shape_plan);
+    free (node);
+    goto retry;
+  }
+  DEBUG_MSG_FUNC (SHAPE_PLAN, shape_plan, "inserted into cache");
+
+  return hb_shape_plan_reference (shape_plan);
+}
+
+/**
+ * hb_shape_plan_get_shaper:
+ * @shape_plan: a shape plan.
+ *
+ * 
+ *
+ * Return value: (transfer none):
+ *
+ * Since: 0.9.7
+ **/
+const char *
+hb_shape_plan_get_shaper (hb_shape_plan_t *shape_plan)
+{
+  return shape_plan->shaper_name;
+}