| /* |
| * Copyright © 2011,2012 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 |
| */ |
| |
| #ifndef HB_OT_MAXP_TABLE_HH |
| #define HB_OT_MAXP_TABLE_HH |
| |
| #include "hb-open-type.hh" |
| |
| namespace OT { |
| |
| |
| /* |
| * maxp -- Maximum Profile |
| * https://docs.microsoft.com/en-us/typography/opentype/spec/maxp |
| */ |
| |
| #define HB_OT_TAG_maxp HB_TAG('m','a','x','p') |
| |
| struct maxpV1Tail |
| { |
| bool sanitize (hb_sanitize_context_t *c) const |
| { |
| TRACE_SANITIZE (this); |
| return_trace (c->check_struct (this)); |
| } |
| |
| HBUINT16 maxPoints; /* Maximum points in a non-composite glyph. */ |
| HBUINT16 maxContours; /* Maximum contours in a non-composite glyph. */ |
| HBUINT16 maxCompositePoints; /* Maximum points in a composite glyph. */ |
| HBUINT16 maxCompositeContours; /* Maximum contours in a composite glyph. */ |
| HBUINT16 maxZones; /* 1 if instructions do not use the twilight zone (Z0), |
| * or 2 if instructions do use Z0; should be set to 2 in |
| * most cases. */ |
| HBUINT16 maxTwilightPoints; /* Maximum points used in Z0. */ |
| HBUINT16 maxStorage; /* Number of Storage Area locations. */ |
| HBUINT16 maxFunctionDefs; /* Number of FDEFs, equal to the highest function number + 1. */ |
| HBUINT16 maxInstructionDefs; /* Number of IDEFs. */ |
| HBUINT16 maxStackElements; /* Maximum stack depth. (This includes Font and CVT |
| * Programs, as well as the instructions for each glyph.) */ |
| HBUINT16 maxSizeOfInstructions; /* Maximum byte count for glyph instructions. */ |
| HBUINT16 maxComponentElements; /* Maximum number of components referenced at |
| * "top level" for any composite glyph. */ |
| HBUINT16 maxComponentDepth; /* Maximum levels of recursion; 1 for simple components. */ |
| public: |
| DEFINE_SIZE_STATIC (26); |
| }; |
| |
| |
| struct maxp |
| { |
| static constexpr hb_tag_t tableTag = HB_OT_TAG_maxp; |
| |
| unsigned int get_num_glyphs () const { return numGlyphs; } |
| |
| void set_num_glyphs (unsigned int count) |
| { |
| numGlyphs = count; |
| } |
| |
| bool sanitize (hb_sanitize_context_t *c) const |
| { |
| TRACE_SANITIZE (this); |
| if (unlikely (!c->check_struct (this))) |
| return_trace (false); |
| |
| if (version.major == 1) |
| { |
| const maxpV1Tail &v1 = StructAfter<maxpV1Tail> (*this); |
| return_trace (v1.sanitize (c)); |
| } |
| return_trace (likely (version.major == 0 && version.minor == 0x5000u)); |
| } |
| |
| bool subset (hb_subset_context_t *c) const |
| { |
| TRACE_SUBSET (this); |
| maxp *maxp_prime = c->serializer->embed (this); |
| if (unlikely (!maxp_prime)) return_trace (false); |
| |
| maxp_prime->numGlyphs = c->plan->num_output_glyphs (); |
| if (maxp_prime->version.major == 1) |
| { |
| const maxpV1Tail *src_v1 = &StructAfter<maxpV1Tail> (*this); |
| maxpV1Tail *dest_v1 = c->serializer->embed<maxpV1Tail> (src_v1); |
| if (unlikely (!dest_v1)) return_trace (false); |
| |
| if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING) |
| drop_hint_fields (dest_v1); |
| |
| if (c->plan->normalized_coords) |
| instancing_update_fields (c->plan->head_maxp_info, dest_v1); |
| } |
| |
| return_trace (true); |
| } |
| |
| void instancing_update_fields (head_maxp_info_t& maxp_info, maxpV1Tail* dest_v1) const |
| { |
| dest_v1->maxPoints = maxp_info.maxPoints; |
| dest_v1->maxContours = maxp_info.maxContours; |
| dest_v1->maxCompositePoints = maxp_info.maxCompositePoints; |
| dest_v1->maxCompositeContours = maxp_info.maxCompositeContours; |
| dest_v1->maxComponentElements = maxp_info.maxComponentElements; |
| dest_v1->maxComponentDepth = maxp_info.maxComponentDepth; |
| } |
| |
| static void drop_hint_fields (maxpV1Tail* dest_v1) |
| { |
| dest_v1->maxZones = 1; |
| dest_v1->maxTwilightPoints = 0; |
| dest_v1->maxStorage = 0; |
| dest_v1->maxFunctionDefs = 0; |
| dest_v1->maxInstructionDefs = 0; |
| dest_v1->maxStackElements = 0; |
| dest_v1->maxSizeOfInstructions = 0; |
| } |
| |
| protected: |
| FixedVersion<>version;/* Version of the maxp table (0.5 or 1.0), |
| * 0x00005000u or 0x00010000u. */ |
| HBUINT16 numGlyphs; |
| /* The number of glyphs in the font. */ |
| /*maxpV1Tail v1Tail[HB_VAR_ARRAY]; */ |
| public: |
| DEFINE_SIZE_STATIC (6); |
| }; |
| |
| |
| } /* namespace OT */ |
| |
| |
| #endif /* HB_OT_MAXP_TABLE_HH */ |