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hb-ot-gasp-table.hh (2369B)

      1 /*
      2 * Copyright © 2018  Ebrahim Byagowi
      3 *
      4 *  This is part of HarfBuzz, a text shaping library.
      5 *
      6 * Permission is hereby granted, without written agreement and without
      7 * license or royalty fees, to use, copy, modify, and distribute this
      8 * software and its documentation for any purpose, provided that the
      9 * above copyright notice and the following two paragraphs appear in
     10 * all copies of this software.
     11 *
     12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
     13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
     15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
     16 * DAMAGE.
     17 *
     18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
     19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
     20 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
     22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
     23 */
     24 
     25 #ifndef HB_OT_GASP_TABLE_HH
     26 #define HB_OT_GASP_TABLE_HH
     27 
     28 #include "hb-open-type.hh"
     29 #include "hb-ot-hhea-table.hh"
     30 #include "hb-ot-os2-table.hh"
     31 #include "hb-ot-var-hvar-table.hh"
     32 
     33 /*
     34 * gasp -- Grid-fitting and Scan-conversion Procedure
     35 * https://docs.microsoft.com/en-us/typography/opentype/spec/gasp
     36 */
     37 #define HB_OT_TAG_gasp HB_TAG('g','a','s','p')
     38 
     39 
     40 namespace OT {
     41 
     42 struct GaspRange
     43 {
     44  bool sanitize (hb_sanitize_context_t *c) const
     45  {
     46    TRACE_SANITIZE (this);
     47    return_trace (c->check_struct (this));
     48  }
     49 
     50  public:
     51  HBUINT16	rangeMaxPPEM;	/* Upper limit of range, in PPEM */
     52  HBUINT16	rangeGaspBehavior;
     53 			/* Flags describing desired rasterizer behavior. */
     54  public:
     55  DEFINE_SIZE_STATIC (4);
     56 };
     57 
     58 struct gasp
     59 {
     60  static constexpr hb_tag_t tableTag = HB_OT_TAG_gasp;
     61 
     62  const GaspRange &get_gasp_range (unsigned int i) const
     63  { return gaspRanges[i]; }
     64 
     65  bool sanitize (hb_sanitize_context_t *c) const
     66  {
     67    TRACE_SANITIZE (this);
     68    return_trace (c->check_struct (this) &&
     69 	  gaspRanges.sanitize (c));
     70  }
     71 
     72  protected:
     73  HBUINT16	version;	/* Version number (set to 1) */
     74  Array16Of<GaspRange>
     75 	gaspRanges;	/* Number of records to follow
     76 			 * Sorted by ppem */
     77  public:
     78  DEFINE_SIZE_ARRAY (4, gaspRanges);
     79 };
     80 
     81 } /* namespace OT */
     82 
     83 
     84 #endif /* HB_OT_GASP_TABLE_HH */