From 587d46227a56940a7f5bb053cbeda6144394acf7 Mon Sep 17 00:00:00 2001 From: Behdad Esfahbod Date: Sat, 30 Apr 2016 19:20:56 +0200 Subject: [PATCH] [ot-font] Start implementing 'post' table, for accessing glyph names --- src/Makefile.sources | 1 + src/hb-open-type-private.hh | 12 +++- src/hb-ot-font.cc | 1 + src/hb-ot-post-table.hh | 119 ++++++++++++++++++++++++++++++++++++ 4 files changed, 132 insertions(+), 1 deletion(-) create mode 100644 src/hb-ot-post-table.hh diff --git a/src/Makefile.sources b/src/Makefile.sources index 171c5135..ac806838 100644 --- a/src/Makefile.sources +++ b/src/Makefile.sources @@ -28,6 +28,7 @@ HB_BASE_sources = \ hb-ot-maxp-table.hh \ hb-ot-name-table.hh \ hb-ot-os2-table.hh \ + hb-ot-post-table.hh \ hb-ot-tag.cc \ hb-private.hh \ hb-set-private.hh \ diff --git a/src/hb-open-type-private.hh b/src/hb-open-type-private.hh index 80ad6877..df683ca4 100644 --- a/src/hb-open-type-private.hh +++ b/src/hb-open-type-private.hh @@ -101,7 +101,8 @@ static inline Type& StructAfter(TObject &X) #define DEFINE_SIZE_STATIC(size) \ DEFINE_INSTANCE_ASSERTION (sizeof (*this) == (size)); \ static const unsigned int static_size = (size); \ - static const unsigned int min_size = (size) + static const unsigned int min_size = (size); \ + inline unsigned int get_size (void) const { return (size); } #define DEFINE_SIZE_UNION(size, _member) \ DEFINE_INSTANCE_ASSERTION (this->u._member.static_size == (size)); \ @@ -671,6 +672,15 @@ struct F2DOT14 : SHORT DEFINE_SIZE_STATIC (2); }; +/* 32-bit signed fixed-point number (16.16). */ +struct Fixed: LONG +{ + //inline float to_float (void) const { return ???; } + //inline void set_float (float f) { v.set (f * ???); } + public: + DEFINE_SIZE_STATIC (4); +}; + /* Date represented in number of seconds since 12:00 midnight, January 1, * 1904. The value is represented as a signed 64-bit integer. */ struct LONGDATETIME diff --git a/src/hb-ot-font.cc b/src/hb-ot-font.cc index 61c70365..23ac41a2 100644 --- a/src/hb-ot-font.cc +++ b/src/hb-ot-font.cc @@ -36,6 +36,7 @@ #include "hb-ot-hhea-table.hh" #include "hb-ot-hmtx-table.hh" #include "hb-ot-os2-table.hh" +#include "hb-ot-post-table.hh" struct hb_ot_face_metrics_accelerator_t diff --git a/src/hb-ot-post-table.hh b/src/hb-ot-post-table.hh new file mode 100644 index 00000000..82ab3882 --- /dev/null +++ b/src/hb-ot-post-table.hh @@ -0,0 +1,119 @@ +/* + * Copyright © 2016 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_POST_TABLE_HH +#define HB_OT_POST_TABLE_HH + +#include "hb-open-type-private.hh" + + +namespace OT { + + +/* + * post -- PostScript + */ + +#define HB_OT_TAG_post HB_TAG('p','o','s','t') + + +struct postV2Tail +{ + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (numberOfGlyphs.sanitize (c) && + c->check_array (glyphNameIndex, sizeof (USHORT), numberOfGlyphs)); + } + + USHORT numberOfGlyphs; /* Number of glyphs (this should be the + * same as numGlyphs in 'maxp' table). */ + USHORT glyphNameIndex[VAR]; /* This is not an offset, but is the + * ordinal number of the glyph in 'post' + * string tables. */ + BYTE namesX[VAR]; /* Glyph names with length bytes [variable] + * (a Pascal string). */ + + DEFINE_SIZE_ARRAY2 (2, glyphNameIndex, namesX); +}; + +struct post +{ + static const hb_tag_t tableTag = HB_OT_TAG_post; + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (unlikely (!c->check_struct (this))) + return_trace (false); + if (version.to_int () == 0x00020000) + { + const postV2Tail &v2 = StructAfter(*this); + return_trace (v2.sanitize (c)); + } + return_trace (true); + } + + public: + FixedVersion<>version; /* 0x00010000 for version 1.0 + * 0x00020000 for version 2.0 + * 0x00025000 for version 2.5 (deprecated) + * 0x00030000 for version 3.0 */ + Fixed italicAngle; /* Italic angle in counter-clockwise degrees + * from the vertical. Zero for upright text, + * negative for text that leans to the right + * (forward). */ + FWORD underlinePosition; /* This is the suggested distance of the top + * of the underline from the baseline + * (negative values indicate below baseline). + * The PostScript definition of this FontInfo + * dictionary key (the y coordinate of the + * center of the stroke) is not used for + * historical reasons. The value of the + * PostScript key may be calculated by + * subtracting half the underlineThickness + * from the value of this field. */ + FWORD underlineThickness; /* Suggested values for the underline + thickness. */ + ULONG isFixedPitch; /* Set to 0 if the font is proportionally + * spaced, non-zero if the font is not + * proportionally spaced (i.e. monospaced). */ + ULONG minMemType42; /* Minimum memory usage when an OpenType font + * is downloaded. */ + ULONG maxMemType42; /* Maximum memory usage when an OpenType font + * is downloaded. */ + ULONG minMemType1; /* Minimum memory usage when an OpenType font + * is downloaded as a Type 1 font. */ + ULONG maxMemType1; /* Maximum memory usage when an OpenType font + * is downloaded as a Type 1 font. */ +/*postV2Tail v2[VAR];*/ + DEFINE_SIZE_STATIC (32); +}; + +} /* namespace OT */ + + +#endif /* HB_OT_POST_TABLE_HH */ -- GitLab