harfbuzz/src/hb-subset-plan.hh

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/*
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* Copyright © 2018 Google, Inc.
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*
* 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): Garret Rieger, Roderick Sheeter
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*/
#ifndef HB_SUBSET_PLAN_HH
#define HB_SUBSET_PLAN_HH
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#include "hb.hh"
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#include "hb-subset.h"
#include "hb-subset-input.hh"
#include "hb-subset-accelerator.hh"
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#include "hb-map.hh"
#include "hb-bimap.hh"
#include "hb-set.hh"
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namespace OT {
struct Feature;
}
struct head_maxp_info_t
{
head_maxp_info_t ()
:xMin (0x7FFF), xMax (-0x7FFF), yMin (0x7FFF), yMax (-0x7FFF),
maxPoints (0), maxContours (0),
maxCompositePoints (0),
maxCompositeContours (0),
maxComponentElements (0),
maxComponentDepth (0),
allXMinIsLsb (true) {}
int xMin;
int xMax;
int yMin;
int yMax;
unsigned maxPoints;
unsigned maxContours;
unsigned maxCompositePoints;
unsigned maxCompositeContours;
unsigned maxComponentElements;
unsigned maxComponentDepth;
bool allXMinIsLsb;
};
typedef struct head_maxp_info_t head_maxp_info_t;
struct hb_subset_plan_t
{
HB_INTERNAL hb_subset_plan_t (hb_face_t *,
const hb_subset_input_t *input);
~hb_subset_plan_t()
{
hb_face_destroy (source);
hb_face_destroy (dest);
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hb_map_destroy (codepoint_to_glyph);
hb_map_destroy (glyph_map);
hb_map_destroy (reverse_glyph_map);
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#ifdef HB_EXPERIMENTAL_API
for (auto _ : name_table_overrides)
_.second.fini ();
#endif
if (inprogress_accelerator)
hb_subset_accelerator_t::destroy ((void*) inprogress_accelerator);
}
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hb_object_header_t header;
bool successful;
unsigned flags;
bool attach_accelerator_data = false;
bool force_long_loca = false;
// For each cp that we'd like to retain maps to the corresponding gid.
hb_set_t unicodes;
hb_sorted_vector_t<hb_pair_t<hb_codepoint_t, hb_codepoint_t>> unicode_to_new_gid_list;
// name_ids we would like to retain
hb_set_t name_ids;
// name_languages we would like to retain
hb_set_t name_languages;
//layout features which will be preserved
hb_set_t layout_features;
// layout scripts which will be preserved.
hb_set_t layout_scripts;
//glyph ids requested to retain
hb_set_t glyphs_requested;
// Tables which should not be processed, just pass them through.
hb_set_t no_subset_tables;
// Tables which should be dropped.
hb_set_t drop_tables;
// The glyph subset
hb_map_t *codepoint_to_glyph; // Needs to be heap-allocated
// Old -> New glyph id mapping
hb_map_t *glyph_map; // Needs to be heap-allocated
hb_map_t *reverse_glyph_map; // Needs to be heap-allocated
hb_map_t glyph_map_gsub;
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// Plan is only good for a specific source/dest so keep them with it
hb_face_t *source;
hb_face_t *dest;
unsigned int _num_output_glyphs;
hb_set_t _glyphset;
hb_set_t _glyphset_gsub;
hb_set_t _glyphset_mathed;
hb_set_t _glyphset_colred;
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//active lookups we'd like to retain
hb_map_t gsub_lookups;
hb_map_t gpos_lookups;
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//active langsys we'd like to retain
hb_hashmap_t<unsigned, hb::unique_ptr<hb_set_t>> gsub_langsys;
hb_hashmap_t<unsigned, hb::unique_ptr<hb_set_t>> gpos_langsys;
//active features after removing redundant langsys and prune_features
hb_map_t gsub_features;
hb_map_t gpos_features;
//active feature variation records/condition index with variations
hb_hashmap_t<unsigned, hb::shared_ptr<hb_set_t>> gsub_feature_record_cond_idx_map;
hb_hashmap_t<unsigned, hb::shared_ptr<hb_set_t>> gpos_feature_record_cond_idx_map;
//feature index-> address of substituation feature table mapping with
//variations
hb_hashmap_t<unsigned, const OT::Feature*> gsub_feature_substitutes_map;
hb_hashmap_t<unsigned, const OT::Feature*> gpos_feature_substitutes_map;
//active layers/palettes we'd like to retain
hb_map_t colrv1_layers;
hb_map_t colr_palettes;
//Old layout item variation index -> (New varidx, delta) mapping
hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> layout_variation_idx_delta_map;
//gdef varstore retained varidx mapping
hb_vector_t<hb_inc_bimap_t> gdef_varstore_inner_maps;
hb_hashmap_t<hb_tag_t, hb::unique_ptr<hb_blob_t>> sanitized_table_cache;
//normalized axes location map
hb_hashmap_t<hb_tag_t, int> axes_location;
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hb_vector_t<int> normalized_coords;
//user specified axes location map
hb_hashmap_t<hb_tag_t, float> user_axes_location;
//retained old axis index -> new axis index mapping in fvar axis array
hb_map_t axes_index_map;
//axis_index->axis_tag mapping in fvar axis array
hb_map_t axes_old_index_tag_map;
bool all_axes_pinned;
bool pinned_at_default;
bool has_seac;
//hmtx metrics map: new gid->(advance, lsb)
mutable hb_hashmap_t<hb_codepoint_t, hb_pair_t<unsigned, int>> hmtx_map;
//vmtx metrics map: new gid->(advance, lsb)
mutable hb_hashmap_t<hb_codepoint_t, hb_pair_t<unsigned, int>> vmtx_map;
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//boundsWidth map: new gid->boundsWidth, boundWidth=xMax - xMin
mutable hb_map_t bounds_width_map;
//boundsHeight map: new gid->boundsHeight, boundsHeight=yMax - yMin
mutable hb_map_t bounds_height_map;
//recalculated head/maxp table info after instancing
mutable head_maxp_info_t head_maxp_info;
#ifdef HB_EXPERIMENTAL_API
// name table overrides map: hb_ot_name_record_ids_t-> name string new value or
// None to indicate should remove
hb_hashmap_t<hb_ot_name_record_ids_t, hb_bytes_t> name_table_overrides;
#endif
const hb_subset_accelerator_t* accelerator;
hb_subset_accelerator_t* inprogress_accelerator;
public:
template<typename T>
hb_blob_ptr_t<T> source_table()
{
hb_lock_t lock (accelerator ? &accelerator->sanitized_table_cache_lock : nullptr);
[subset] Accelerate sanitize-table-cache Big wins all across small subsets BM_subset/subset_codepoints/Roboto-Regular.ttf/nohinting/10                              -0.1140         -0.1129             0             0             0             0 BM_subset/subset_codepoints/Amiri-Regular.ttf/nohinting/10                               -0.4717         -0.4714             0             0             0             0 BM_subset/subset_codepoints/NotoNastaliqUrdu-Regular.ttf/nohinting/10                    -0.8147         -0.8146             0             0             0             0 BM_subset/subset_codepoints/NotoSansDevanagari-Regular.ttf/nohinting/10                  -0.3248         -0.3242             0             0             0             0 BM_subset/subset_codepoints/Mplus1p-Regular.ttf/nohinting/10                             -0.1262         -0.1260             0             0             0             0 BM_subset/subset_codepoints/SourceHanSans-Regular_subset.otf/nohinting/10                -0.0308         -0.0309             0             0             0             0 BM_subset/subset_codepoints/SourceSansPro-Regular.otf/nohinting/10                       -0.1374         -0.1373             0             0             0             0 BM_subset/subset_codepoints/AdobeVFPrototype.otf/nohinting/10                            -0.4555         -0.4555             0             0             0             0 BM_subset/subset_codepoints/MPLUS1-Variable.ttf/nohinting/10                             -0.4175         -0.4174             0             0             0             0 BM_subset/subset_codepoints/RobotoFlex-Variable.ttf/nohinting/10                         -0.4214         -0.4214             0             0             0
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auto *cache = accelerator ? &accelerator->sanitized_table_cache : &sanitized_table_cache;
[subset] Accelerate sanitize-table-cache Big wins all across small subsets BM_subset/subset_codepoints/Roboto-Regular.ttf/nohinting/10                              -0.1140         -0.1129             0             0             0             0 BM_subset/subset_codepoints/Amiri-Regular.ttf/nohinting/10                               -0.4717         -0.4714             0             0             0             0 BM_subset/subset_codepoints/NotoNastaliqUrdu-Regular.ttf/nohinting/10                    -0.8147         -0.8146             0             0             0             0 BM_subset/subset_codepoints/NotoSansDevanagari-Regular.ttf/nohinting/10                  -0.3248         -0.3242             0             0             0             0 BM_subset/subset_codepoints/Mplus1p-Regular.ttf/nohinting/10                             -0.1262         -0.1260             0             0             0             0 BM_subset/subset_codepoints/SourceHanSans-Regular_subset.otf/nohinting/10                -0.0308         -0.0309             0             0             0             0 BM_subset/subset_codepoints/SourceSansPro-Regular.otf/nohinting/10                       -0.1374         -0.1373             0             0             0             0 BM_subset/subset_codepoints/AdobeVFPrototype.otf/nohinting/10                            -0.4555         -0.4555             0             0             0             0 BM_subset/subset_codepoints/MPLUS1-Variable.ttf/nohinting/10                             -0.4175         -0.4174             0             0             0             0 BM_subset/subset_codepoints/RobotoFlex-Variable.ttf/nohinting/10                         -0.4214         -0.4214             0             0             0
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if (cache
&& !cache->in_error ()
&& cache->has (+T::tableTag)) {
return hb_blob_reference (cache->get (+T::tableTag).get ());
}
hb::unique_ptr<hb_blob_t> table_blob {hb_sanitize_context_t ().reference_table<T> (source)};
hb_blob_t* ret = hb_blob_reference (table_blob.get ());
[subset] Accelerate sanitize-table-cache Big wins all across small subsets BM_subset/subset_codepoints/Roboto-Regular.ttf/nohinting/10                              -0.1140         -0.1129             0             0             0             0 BM_subset/subset_codepoints/Amiri-Regular.ttf/nohinting/10                               -0.4717         -0.4714             0             0             0             0 BM_subset/subset_codepoints/NotoNastaliqUrdu-Regular.ttf/nohinting/10                    -0.8147         -0.8146             0             0             0             0 BM_subset/subset_codepoints/NotoSansDevanagari-Regular.ttf/nohinting/10                  -0.3248         -0.3242             0             0             0             0 BM_subset/subset_codepoints/Mplus1p-Regular.ttf/nohinting/10                             -0.1262         -0.1260             0             0             0             0 BM_subset/subset_codepoints/SourceHanSans-Regular_subset.otf/nohinting/10                -0.0308         -0.0309             0             0             0             0 BM_subset/subset_codepoints/SourceSansPro-Regular.otf/nohinting/10                       -0.1374         -0.1373             0             0             0             0 BM_subset/subset_codepoints/AdobeVFPrototype.otf/nohinting/10                            -0.4555         -0.4555             0             0             0             0 BM_subset/subset_codepoints/MPLUS1-Variable.ttf/nohinting/10                             -0.4175         -0.4174             0             0             0             0 BM_subset/subset_codepoints/RobotoFlex-Variable.ttf/nohinting/10                         -0.4214         -0.4214             0             0             0
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if (likely (cache))
cache->set (+T::tableTag, std::move (table_blob));
return ret;
}
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bool in_error () const { return !successful; }
bool check_success(bool success)
{
successful = (successful && success);
return successful;
}
/*
* The set of input glyph ids which will be retained in the subset.
* Does NOT include ids kept due to retain_gids. You probably want to use
* glyph_map/reverse_glyph_map.
*/
inline const hb_set_t *
glyphset () const
{
return &_glyphset;
}
/*
* The set of input glyph ids which will be retained in the subset.
*/
inline const hb_set_t *
glyphset_gsub () const
{
return &_glyphset_gsub;
}
/*
* The total number of output glyphs in the final subset.
*/
inline unsigned int
num_output_glyphs () const
{
return _num_output_glyphs;
}
/*
* Given an output gid , returns true if that glyph id is an empty
* glyph (ie. it's a gid that we are dropping all data for).
*/
inline bool is_empty_glyph (hb_codepoint_t gid) const
{
return !_glyphset.has (gid);
}
inline bool new_gid_for_codepoint (hb_codepoint_t codepoint,
hb_codepoint_t *new_gid) const
{
hb_codepoint_t old_gid = codepoint_to_glyph->get (codepoint);
if (old_gid == HB_MAP_VALUE_INVALID)
return false;
return new_gid_for_old_gid (old_gid, new_gid);
}
inline bool new_gid_for_old_gid (hb_codepoint_t old_gid,
hb_codepoint_t *new_gid) const
{
hb_codepoint_t gid = glyph_map->get (old_gid);
if (gid == HB_MAP_VALUE_INVALID)
return false;
*new_gid = gid;
return true;
}
inline bool old_gid_for_new_gid (hb_codepoint_t new_gid,
hb_codepoint_t *old_gid) const
{
hb_codepoint_t gid = reverse_glyph_map->get (new_gid);
if (gid == HB_MAP_VALUE_INVALID)
return false;
*old_gid = gid;
return true;
}
inline bool
add_table (hb_tag_t tag,
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hb_blob_t *contents)
{
if (HB_DEBUG_SUBSET)
{
hb_blob_t *source_blob = source->reference_table (tag);
DEBUG_MSG(SUBSET, nullptr, "add table %c%c%c%c, dest %u bytes, source %u bytes",
HB_UNTAG(tag),
hb_blob_get_length (contents),
hb_blob_get_length (source_blob));
hb_blob_destroy (source_blob);
}
return hb_face_builder_add_table (dest, tag, contents);
}
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};
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#endif /* HB_SUBSET_PLAN_HH */