michael@0: /*
michael@0:  * Copyright © 2010  Google, Inc.
michael@0:  *
michael@0:  *  This is part of HarfBuzz, a text shaping library.
michael@0:  *
michael@0:  * Permission is hereby granted, without written agreement and without
michael@0:  * license or royalty fees, to use, copy, modify, and distribute this
michael@0:  * software and its documentation for any purpose, provided that the
michael@0:  * above copyright notice and the following two paragraphs appear in
michael@0:  * all copies of this software.
michael@0:  *
michael@0:  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
michael@0:  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
michael@0:  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
michael@0:  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
michael@0:  * DAMAGE.
michael@0:  *
michael@0:  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
michael@0:  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0:  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
michael@0:  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
michael@0:  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
michael@0:  *
michael@0:  * Google Author(s): Behdad Esfahbod
michael@0:  */
michael@0: 
michael@0: #ifndef HB_OT_SHAPE_PRIVATE_HH
michael@0: #define HB_OT_SHAPE_PRIVATE_HH
michael@0: 
michael@0: #include "hb-private.hh"
michael@0: 
michael@0: #include "hb-ot-map-private.hh"
michael@0: #include "hb-ot-layout-private.hh"
michael@0: 
michael@0: 
michael@0: 
michael@0: struct hb_ot_shape_plan_t
michael@0: {
michael@0:   hb_segment_properties_t props;
michael@0:   const struct hb_ot_complex_shaper_t *shaper;
michael@0:   hb_ot_map_t map;
michael@0:   const void *data;
michael@0:   hb_mask_t rtlm_mask, frac_mask, numr_mask, dnom_mask;
michael@0:   hb_mask_t kern_mask;
michael@0:   unsigned int has_frac : 1;
michael@0:   unsigned int has_kern : 1;
michael@0: 
michael@0:   inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
michael@0:   {
michael@0:     unsigned int table_index;
michael@0:     switch (table_tag) {
michael@0:       case HB_OT_TAG_GSUB: table_index = 0; break;
michael@0:       case HB_OT_TAG_GPOS: table_index = 1; break;
michael@0:       default: return;
michael@0:     }
michael@0:     map.collect_lookups (table_index, lookups);
michael@0:   }
michael@0:   inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
michael@0:   inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
michael@0: 
michael@0:   void finish (void) { map.finish (); }
michael@0: };
michael@0: 
michael@0: struct hb_ot_shape_planner_t
michael@0: {
michael@0:   /* In the order that they are filled in. */
michael@0:   hb_face_t *face;
michael@0:   hb_segment_properties_t props;
michael@0:   const struct hb_ot_complex_shaper_t *shaper;
michael@0:   hb_ot_map_builder_t map;
michael@0: 
michael@0:   hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
michael@0: 			 face (master_plan->face_unsafe),
michael@0: 			 props (master_plan->props),
michael@0: 			 shaper (NULL),
michael@0: 			 map (face, &props) {}
michael@0:   ~hb_ot_shape_planner_t (void) { map.finish (); }
michael@0: 
michael@0:   inline void compile (hb_ot_shape_plan_t &plan)
michael@0:   {
michael@0:     plan.props = props;
michael@0:     plan.shaper = shaper;
michael@0:     map.compile (plan.map);
michael@0: 
michael@0:     plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m'));
michael@0:     plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));
michael@0:     plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));
michael@0:     plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m'));
michael@0: 
michael@0:     plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ?
michael@0: 					HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
michael@0: 
michael@0:     plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask);
michael@0:     plan.has_kern = !!plan.kern_mask;
michael@0:   }
michael@0: 
michael@0:   private:
michael@0:   NO_COPY (hb_ot_shape_planner_t);
michael@0: };
michael@0: 
michael@0: 
michael@0: #endif /* HB_OT_SHAPE_PRIVATE_HH */