/*
- * Copyright (C) 2009,2010 Red Hat, Inc.
- * Copyright (C) 2010 Google, Inc.
+ * Copyright © 2009,2010 Red Hat, Inc.
+ * Copyright © 2010,2011 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
#ifndef HB_OT_MAP_PRIVATE_HH
#define HB_OT_MAP_PRIVATE_HH
-#include "hb-ot-shape-private.hh"
+#include "hb-buffer-private.hh"
#include "hb-ot-layout.h"
HB_BEGIN_DECLS
-#define MAX_FEATURES 100 /* FIXME */
-#define MAX_LOOKUPS 1000 /* FIXME */
-
static const hb_tag_t table_tags[2] = {HB_OT_TAG_GSUB, HB_OT_TAG_GPOS};
-struct hb_mask_allocator_t {
+struct hb_ot_map_t
+{
+ friend struct hb_ot_map_builder_t;
- private:
+ public:
- struct feature_info_t {
- hb_tag_t tag;
- unsigned int value;
- unsigned int seq;
- bool global;
+ typedef void (*gsub_pause_func_t) (const hb_ot_map_t *map, hb_face_t *face, hb_buffer_t *buffer, void *user_data);
+ typedef void (*gpos_pause_func_t) (const hb_ot_map_t *map, hb_font_t *font, hb_buffer_t *buffer, void *user_data);
- static int cmp (const feature_info_t *a, const feature_info_t *b)
- { return (a->tag != b->tag) ? (a->tag < b->tag ? -1 : 1) : (a->seq < b->seq ? -1 : 1); }
- };
+ inline hb_mask_t get_global_mask (void) const { return global_mask; }
+
+ inline hb_mask_t get_mask (hb_tag_t tag, unsigned int *shift = NULL) const {
+ const feature_map_t *map = features.bsearch (&tag);
+ if (shift) *shift = map ? map->shift : 0;
+ return map ? map->mask : 0;
+ }
+
+ inline hb_mask_t get_1_mask (hb_tag_t tag) const {
+ const feature_map_t *map = features.bsearch (&tag);
+ return map ? map->_1_mask : 0;
+ }
+
+ inline void substitute (hb_face_t *face, hb_buffer_t *buffer) const
+ { apply (0, (hb_ot_map_t::apply_lookup_func_t) hb_ot_layout_substitute_lookup, face, buffer); }
+ inline void position (hb_font_t *font, hb_buffer_t *buffer) const
+ { apply (1, (hb_ot_map_t::apply_lookup_func_t) hb_ot_layout_position_lookup, font, buffer); }
+
+ inline void finish (void) {
+ features.finish ();
+ lookups[0].finish ();
+ lookups[1].finish ();
+ pauses[0].finish ();
+ pauses[1].finish ();
+ }
+
+ private:
struct feature_map_t {
hb_tag_t tag; /* should be first for our bsearch to work */
- unsigned int index[2]; /* GSUB, GPOS */
+ unsigned int index[2]; /* GSUB/GPOS */
+ unsigned int stage[2]; /* GSUB/GPOS */
unsigned int shift;
hb_mask_t mask;
+ hb_mask_t _1_mask; /* mask for value=1, for quick access */
static int cmp (const feature_map_t *a, const feature_map_t *b)
{ return a->tag < b->tag ? -1 : a->tag > b->tag ? 1 : 0; }
{ return a->index < b->index ? -1 : a->index > b->index ? 1 : 0; }
};
+ typedef void (*pause_func_t) (const hb_ot_map_t *map, void *face_or_font, hb_buffer_t *buffer, void *user_data);
+ typedef struct {
+ pause_func_t func;
+ void *user_data;
+ } pause_callback_t;
- void
- add_lookups (hb_ot_shape_context_t *c,
- unsigned int table_index,
- unsigned int feature_index,
- hb_mask_t mask)
- {
- unsigned int i = MAX_LOOKUPS - lookup_count[table_index];
- lookup_map_t *lookups = lookup_maps[table_index] + lookup_count[table_index];
+ struct pause_map_t {
+ unsigned int num_lookups; /* Cumulative */
+ pause_callback_t callback;
+ };
- unsigned int *lookup_indices = (unsigned int *) lookups;
+ typedef hb_bool_t (*apply_lookup_func_t) (void *face_or_font,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask);
- hb_ot_layout_feature_get_lookup_indexes (c->face,
- table_tags[table_index],
- feature_index,
- 0, &i,
- lookup_indices);
+ HB_INTERNAL void add_lookups (hb_face_t *face,
+ unsigned int table_index,
+ unsigned int feature_index,
+ hb_mask_t mask);
- lookup_count[table_index] += i;
+ HB_INTERNAL void apply (unsigned int table_index,
+ hb_ot_map_t::apply_lookup_func_t apply_lookup_func,
+ void *face_or_font,
+ hb_buffer_t *buffer) const;
- while (i--) {
- lookups[i].mask = mask;
- lookups[i].index = lookup_indices[i];
- }
- }
+ hb_mask_t global_mask;
+ hb_prealloced_array_t<feature_map_t, 8> features;
+ hb_prealloced_array_t<lookup_map_t, 32> lookups[2]; /* GSUB/GPOS */
+ hb_prealloced_array_t<pause_map_t, 1> pauses[2]; /* GSUB/GPOS */
+};
+struct hb_ot_map_builder_t
+{
public:
- hb_mask_allocator_t (void) : feature_count (0) {}
-
- void add_feature (hb_tag_t tag,
- unsigned int value,
- bool global)
- {
- feature_info_t *info = &feature_infos[feature_count++];
- info->tag = tag;
- info->value = value;
- info->seq = feature_count;
- info->global = global;
- }
-
- HB_INTERNAL void compile (hb_ot_shape_context_t *c);
+ HB_INTERNAL void add_feature (hb_tag_t tag, unsigned int value, bool global);
- hb_mask_t get_global_mask (void) const { return global_mask; }
+ inline void add_bool_feature (hb_tag_t tag, bool global = true)
+ { add_feature (tag, 1, global); }
- hb_mask_t get_mask (hb_tag_t tag, unsigned int *shift) const {
- const feature_map_t *map = (const feature_map_t *) bsearch (&tag, feature_maps, feature_count, sizeof (feature_maps[0]), (hb_compare_func_t) feature_map_t::cmp);
- if (shift) *shift = map ? map->shift : 0;
- return map ? map->mask : 0;
- }
+ inline void add_gsub_pause (hb_ot_map_t::gsub_pause_func_t pause_func, void *user_data)
+ { add_pause (0, (hb_ot_map_t::pause_func_t) pause_func, user_data); }
+ inline void add_gpos_pause (hb_ot_map_t::gpos_pause_func_t pause_func, void *user_data)
+ { add_pause (1, (hb_ot_map_t::pause_func_t) pause_func, user_data); }
- inline void substitute (hb_ot_shape_context_t *c) const {
- for (unsigned int i = 0; i < lookup_count[0]; i++)
- hb_ot_layout_substitute_lookup (c->face, c->buffer, lookup_maps[0][i].index, lookup_maps[0][i].mask);
- }
+ HB_INTERNAL void compile (hb_face_t *face,
+ const hb_segment_properties_t *props,
+ struct hb_ot_map_t &m);
- inline void position (hb_ot_shape_context_t *c) const {
- for (unsigned int i = 0; i < lookup_count[1]; i++)
- hb_ot_layout_position_lookup (c->font, c->face, c->buffer, lookup_maps[1][i].index, lookup_maps[1][i].mask);
+ inline void finish (void) {
+ feature_infos.finish ();
+ pauses[0].finish ();
+ pauses[1].finish ();
}
private:
- hb_mask_t global_mask;
+ struct feature_info_t {
+ hb_tag_t tag;
+ unsigned int seq; /* sequence#, used for stable sorting only */
+ unsigned int max_value;
+ bool global; /* whether the feature applies value to every glyph in the buffer */
+ unsigned int default_value; /* for non-global features, what should the unset glyphs take */
+ unsigned int stage[2]; /* GSUB/GPOS */
- unsigned int feature_count;
- feature_info_t feature_infos[MAX_FEATURES]; /* used before compile() only */
- feature_map_t feature_maps[MAX_FEATURES];
+ static int cmp (const feature_info_t *a, const feature_info_t *b)
+ { return (a->tag != b->tag) ? (a->tag < b->tag ? -1 : 1) : (a->seq < b->seq ? -1 : 1); }
+ };
- lookup_map_t lookup_maps[2][MAX_LOOKUPS]; /* GSUB/GPOS */
- unsigned int lookup_count[2];
-};
+ struct pause_info_t {
+ unsigned int stage;
+ hb_ot_map_t::pause_callback_t callback;
+ };
+ HB_INTERNAL void add_pause (unsigned int table_index, hb_ot_map_t::pause_func_t pause_func, void *user_data);
+
+ unsigned int current_stage[2]; /* GSUB/GPOS */
+ hb_prealloced_array_t<feature_info_t,16> feature_infos;
+ hb_prealloced_array_t<pause_info_t, 1> pauses[2]; /* GSUB/GPOS */
+};
HB_END_DECLS
projects / framework / uifw / harfbuzz.git / blobdiff