From cf5585cfa6cac6fdf627a99941299e76af5ae0f7 Mon Sep 17 00:00:00 2001 From: Behdad Esfahbod Date: Wed, 19 May 2010 12:03:35 -0400 Subject: [PATCH] Add 'head' table --- src/Makefile.am | 1 + src/hb-font-private.hh | 5 ++ src/hb-font.cc | 9 +++ src/hb-open-type-private.hh | 2 +- src/hb-ot-head-private.hh | 128 ++++++++++++++++++++++++++++++++++++ 5 files changed, 144 insertions(+), 1 deletion(-) create mode 100644 src/hb-ot-head-private.hh diff --git a/src/Makefile.am b/src/Makefile.am index f52ea49a9..fb82f0e0f 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -20,6 +20,7 @@ HBSOURCES = \ hb-open-file-private.hh \ hb-open-type-private.hh \ hb-language.c \ + hb-ot-head-private.hh \ hb-private.h \ hb-shape.cc \ hb-unicode.c \ diff --git a/src/hb-font-private.hh b/src/hb-font-private.hh index 0d82850b0..7cc632782 100644 --- a/src/hb-font-private.hh +++ b/src/hb-font-private.hh @@ -31,6 +31,8 @@ #include "hb-font.h" +#include "hb-ot-head-private.hh" + #include "hb-ot-layout-private.hh" HB_BEGIN_DECLS @@ -64,6 +66,9 @@ struct _hb_face_t { hb_destroy_func_t destroy; void *user_data; + hb_blob_t *head_blob; + const struct head *head_table; + hb_ot_layout_t ot_layout; }; diff --git a/src/hb-font.cc b/src/hb-font.cc index 46b63a481..3feddfc8e 100644 --- a/src/hb-font.cc +++ b/src/hb-font.cc @@ -231,6 +231,9 @@ static hb_face_t _hb_face_nil = { NULL, /* destroy */ NULL, /* user_data */ + NULL, /* head_blob */ + NULL, /* head_table */ + {} /* ot_layout */ }; @@ -324,6 +327,9 @@ hb_face_create_for_data (hb_blob_t *blob, face->user_data = _hb_face_for_data_closure_create (Sanitizer::sanitize (blob), index); hb_blob_destroy (blob); + face->head_blob = Sanitizer::sanitize (hb_face_get_table (face, HB_OT_TAG_head)); + face->head_table = Sanitizer::lock_instance (face->head_blob); + _hb_ot_layout_init (face); return face; @@ -349,6 +355,9 @@ hb_face_destroy (hb_face_t *face) _hb_ot_layout_fini (face); + hb_blob_unlock (face->head_blob); + hb_blob_destroy (face->head_blob); + if (face->destroy) face->destroy (face->user_data); diff --git a/src/hb-open-type-private.hh b/src/hb-open-type-private.hh index 4fc82dd5f..2ab639c4c 100644 --- a/src/hb-open-type-private.hh +++ b/src/hb-open-type-private.hh @@ -120,7 +120,7 @@ inline Type& StructAfter(TObject &X) */ /* Global nul-content Null pool. Enlarge as necessary. */ -static const void *_NullPool[16 / sizeof (void *)]; +static const void *_NullPool[64 / sizeof (void *)]; /* Generic nul-content Null objects. */ template diff --git a/src/hb-ot-head-private.hh b/src/hb-ot-head-private.hh new file mode 100644 index 000000000..cdc981f5d --- /dev/null +++ b/src/hb-ot-head-private.hh @@ -0,0 +1,128 @@ +/* + * Copyright (C) 2010 Red Hat, 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. + * + * Red Hat Author(s): Behdad Esfahbod + */ + +#ifndef HB_OT_HEAD_PRIVATE_HH +#define HB_OT_HEAD_PRIVATE_HH + +#include "hb-open-type-private.hh" + +/* + * head + */ + +#define HB_OT_TAG_head HB_TAG('h','e','a','d') + +struct head +{ + static const hb_tag_t Tag = HB_OT_TAG_head; + + inline bool sanitize (hb_sanitize_context_t *c) { + TRACE_SANITIZE (); + /* Shall we check for magicNumber here? Who cares? */ + return c->check_struct (this) && likely (version.major == 1); + } + + FixedVersion version; /* Version of the head table--currently + * 0x00010000 for version 1.0. */ + FixedVersion fontRevision; /* Set by font manufacturer. */ + ULONG checkSumAdjustment; /* To compute: set it to 0, sum the + * entire font as ULONG, then store + * 0xB1B0AFBA - sum. */ + ULONG magicNumber; /* Set to 0x5F0F3CF5. */ + USHORT flags; /* Bit 0: Baseline for font at y=0; + * Bit 1: Left sidebearing point at x=0; + * Bit 2: Instructions may depend on point size; + * Bit 3: Force ppem to integer values for all + * internal scaler math; may use fractional + * ppem sizes if this bit is clear; + * Bit 4: Instructions may alter advance width + * (the advance widths might not scale linearly); + + * Bits 5-10: These should be set according to + * Apple's specification. However, they are not + * implemented in OpenType. + * Bit 5: This bit should be set in fonts that are + * intended to e laid out vertically, and in + * which the glyphs have been drawn such that an + * x-coordinate of 0 corresponds to the desired + * vertical baseline. + * Bit 6: This bit must be set to zero. + * Bit 7: This bit should be set if the font + * requires layout for correct linguistic + * rendering (e.g. Arabic fonts). + * Bit 8: This bit should be set for a GX font + * which has one or more metamorphosis effects + * designated as happening by default. + * Bit 9: This bit should be set if the font + * contains any strong right-to-left glyphs. + * Bit 10: This bit should be set if the font + * contains Indic-style rearrangement effects. + + * Bit 11: Font data is 'lossless,' as a result + * of having been compressed and decompressed + * with the Agfa MicroType Express engine. + * Bit 12: Font converted (produce compatible metrics) + * Bit 13: Font optimized for ClearType™. + * Note, fonts that rely on embedded bitmaps (EBDT) + * for rendering should not be considered optimized + * for ClearType, and therefore should keep this bit + * cleared. + * Bit 14: Reserved, set to 0 + * Bit 15: Reserved, set to 0. */ + USHORT unitsPerEm; /* Valid range is from 16 to 16384. This value + * should be a power of 2 for fonts that have + * TrueType outlines. */ + LONGDATETIME created; /* Number of seconds since 12:00 midnight, + January 1, 1904. 64-bit integer */ + LONGDATETIME modified; /* Number of seconds since 12:00 midnight, + January 1, 1904. 64-bit integer */ + SHORT xMin; /* For all glyph bounding boxes. */ + SHORT yMin; /* For all glyph bounding boxes. */ + SHORT xMax; /* For all glyph bounding boxes. */ + SHORT yMax; /* For all glyph bounding boxes. */ + USHORT macStyle; /* Bit 0: Bold (if set to 1); + * Bit 1: Italic (if set to 1) + * Bit 2: Underline (if set to 1) + * Bit 3: Outline (if set to 1) + * Bit 4: Shadow (if set to 1) + * Bit 5: Condensed (if set to 1) + * Bit 6: Extended (if set to 1) + * Bits 7-15: Reserved (set to 0). */ + USHORT lowestRecPPEM; /* Smallest readable size in pixels. */ + SHORT fontDirectionHint; /* Deprecated (Set to 2). + * 0: Fully mixed directional glyphs; + * 1: Only strongly left to right; + * 2: Like 1 but also contains neutrals; + * -1: Only strongly right to left; + * -2: Like -1 but also contains neutrals. */ + SHORT indexToLocFormat; /* 0 for short offsets, 1 for long. */ + SHORT glyphDataFormat; /* 0 for current format. */ + public: + DEFINE_SIZE_STATIC (54); +}; + + +#endif /* HB_OT_HEAD_PRIVATE_HH */