--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-shape-plan.cc Mon Nov 23 09:58:44 2015 -0800
@@ -0,0 +1,500 @@
+/*
+ * 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 char * const *shaper_list)
+{
+ DEBUG_MSG_FUNC (SHAPE_PLAN, shape_plan,
+ "num_features=%d shaper_list=%p",
+ num_user_features,
+ 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); \
+ 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)
+{
+ DEBUG_MSG_FUNC (SHAPE_PLAN, NULL,
+ "face=%p num_features=%d shaper_list=%p",
+ face,
+ num_user_features,
+ shaper_list);
+
+ hb_shape_plan_t *shape_plan;
+ hb_feature_t *features = 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 (!(shape_plan = hb_object_create<hb_shape_plan_t> ())) {
+ 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));
+
+ hb_shape_plan_plan (shape_plan, user_features, num_user_features, 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 */
+
+ {
+#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);
+}
+
+/**
+ * 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",
+ num_features,
+ shape_plan->shaper_func);
+
+ 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;
+ 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 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) &&
+ ((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;
+}
+
+/**
+ * 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)
+{
+ 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_create (face, props, user_features, num_user_features, 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;
+
+ 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;
+}