* Copyright © 1998-2004 David Turner and Werner Lemberg
* Copyright © 2006 Behdad Esfahbod
* Copyright © 2007,2008,2009 Red Hat, Inc.
- * Copyright © 2012 Google, Inc.
+ * Copyright © 2012,2013 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Google Author(s): Behdad Esfahbod
*/
-#include "hb-ot-layout-private.hh"
+#include "hb.hh"
-#include "hb-ot-layout-gdef-table.hh"
-#include "hb-ot-layout-gsub-table.hh"
-#include "hb-ot-layout-gpos-table.hh"
-
-#include <stdlib.h>
-#include <string.h>
+#ifndef HB_NO_OT_LAYOUT
+#ifdef HB_NO_OT_TAG
+#error "Cannot compile hb-ot-layout.cc with HB_NO_OT_TAG."
+#endif
-HB_SHAPER_DATA_ENSURE_DECLARE(ot, face)
+#include "hb-open-type.hh"
+#include "hb-ot-layout.hh"
+#include "hb-ot-face.hh"
+#include "hb-ot-map.hh"
+#include "hb-map.hh"
-hb_ot_layout_t *
-_hb_ot_layout_create (hb_face_t *face)
-{
- hb_ot_layout_t *layout = (hb_ot_layout_t *) calloc (1, sizeof (hb_ot_layout_t));
- if (unlikely (!layout))
- return NULL;
+#include "hb-ot-kern-table.hh"
+#include "hb-ot-layout-gdef-table.hh"
+#include "hb-ot-layout-gsub-table.hh"
+#include "hb-ot-layout-gpos-table.hh"
+#include "hb-ot-layout-base-table.hh" // Just so we compile it; unused otherwise.
+#include "hb-ot-layout-jstf-table.hh" // Just so we compile it; unused otherwise.
+#include "hb-ot-name-table.hh"
+#include "hb-ot-os2-table.hh"
- layout->gdef_blob = OT::Sanitizer<OT::GDEF>::sanitize (face->reference_table (HB_OT_TAG_GDEF));
- layout->gdef = OT::Sanitizer<OT::GDEF>::lock_instance (layout->gdef_blob);
+#include "hb-aat-layout-lcar-table.hh"
+#include "hb-aat-layout-morx-table.hh"
- layout->gsub_blob = OT::Sanitizer<OT::GSUB>::sanitize (face->reference_table (HB_OT_TAG_GSUB));
- layout->gsub = OT::Sanitizer<OT::GSUB>::lock_instance (layout->gsub_blob);
+#include "hb-aat-layout-opbd-table.hh" // Just so we compile it; unused otherwise.
- layout->gpos_blob = OT::Sanitizer<OT::GPOS>::sanitize (face->reference_table (HB_OT_TAG_GPOS));
- layout->gpos = OT::Sanitizer<OT::GPOS>::lock_instance (layout->gpos_blob);
+/**
+ * SECTION:hb-ot-layout
+ * @title: hb-ot-layout
+ * @short_description: OpenType Layout
+ * @include: hb-ot.h
+ *
+ * Functions for querying OpenType Layout features in the font face.
+ **/
- layout->gsub_lookup_count = layout->gsub->get_lookup_count ();
- layout->gpos_lookup_count = layout->gpos->get_lookup_count ();
- layout->gsub_digests = (hb_set_digest_t *) calloc (layout->gsub->get_lookup_count (), sizeof (hb_set_digest_t));
- layout->gpos_digests = (hb_set_digest_t *) calloc (layout->gpos->get_lookup_count (), sizeof (hb_set_digest_t));
+/*
+ * kern
+ */
- if (unlikely ((layout->gsub_lookup_count && !layout->gsub_digests) ||
- (layout->gpos_lookup_count && !layout->gpos_digests)))
- {
- _hb_ot_layout_destroy (layout);
- return NULL;
- }
+#ifndef HB_NO_OT_KERN
+/**
+ * hb_ot_layout_has_kerning:
+ * @face: The #hb_face_t to work on
+ *
+ * Tests whether a face includes any kerning data in the 'kern' table.
+ * Does NOT test for kerning lookups in the GPOS table.
+ *
+ * Return value: true if data found, false otherwise
+ *
+ **/
+bool
+hb_ot_layout_has_kerning (hb_face_t *face)
+{
+ return face->table.kern->has_data ();
+}
- for (unsigned int i = 0; i < layout->gsub_lookup_count; i++)
- layout->gsub->get_lookup (i).add_coverage (&layout->gsub_digests[i]);
- for (unsigned int i = 0; i < layout->gpos_lookup_count; i++)
- layout->gpos->get_lookup (i).add_coverage (&layout->gpos_digests[i]);
+/**
+ * hb_ot_layout_has_machine_kerning:
+ * @face: The #hb_face_t to work on
+ *
+ * Tests whether a face includes any state-machine kerning in the 'kern' table.
+ * Does NOT examine the GPOS table.
+ *
+ * Return value: true if data found, false otherwise
+ *
+ **/
+bool
+hb_ot_layout_has_machine_kerning (hb_face_t *face)
+{
+ return face->table.kern->has_state_machine ();
+}
- return layout;
+/**
+ * hb_ot_layout_has_cross_kerning:
+ * @face: The #hb_face_t to work on
+ *
+ * Tests whether a face has any cross-stream kerning (i.e., kerns
+ * that make adjustments perpendicular to the direction of the text
+ * flow: Y adjustments in horizontal text or X adjustments in
+ * vertical text) in the 'kern' table.
+ *
+ * Does NOT examine the GPOS table.
+ *
+ * Return value: true is data found, false otherwise
+ *
+ **/
+bool
+hb_ot_layout_has_cross_kerning (hb_face_t *face)
+{
+ return face->table.kern->has_cross_stream ();
}
void
-_hb_ot_layout_destroy (hb_ot_layout_t *layout)
+hb_ot_layout_kern (const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer)
{
- hb_blob_destroy (layout->gdef_blob);
- hb_blob_destroy (layout->gsub_blob);
- hb_blob_destroy (layout->gpos_blob);
+ hb_blob_t *blob = font->face->table.kern.get_blob ();
+ const AAT::kern& kern = *blob->as<AAT::kern> ();
- free (layout->gsub_digests);
- free (layout->gpos_digests);
+ AAT::hb_aat_apply_context_t c (plan, font, buffer, blob);
- free (layout);
+ kern.apply (&c);
}
+#endif
-static inline const OT::GDEF&
-_get_gdef (hb_face_t *face)
-{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::GDEF);
- return *hb_ot_layout_from_face (face)->gdef;
-}
-static inline const OT::GSUB&
-_get_gsub (hb_face_t *face)
+
+/*
+ * GDEF
+ */
+
+bool
+OT::GDEF::is_blacklisted (hb_blob_t *blob,
+ hb_face_t *face) const
{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::GSUB);
- return *hb_ot_layout_from_face (face)->gsub;
+#ifdef HB_NO_OT_LAYOUT_BLACKLIST
+ return false;
+#endif
+ /* The ugly business of blacklisting individual fonts' tables happen here!
+ * See this thread for why we finally had to bend in and do this:
+ * https://lists.freedesktop.org/archives/harfbuzz/2016-February/005489.html
+ *
+ * In certain versions of Times New Roman Italic and Bold Italic,
+ * ASCII double quotation mark U+0022 has wrong glyph class 3 (mark)
+ * in GDEF. Many versions of Tahoma have bad GDEF tables that
+ * incorrectly classify some spacing marks such as certain IPA
+ * symbols as glyph class 3. So do older versions of Microsoft
+ * Himalaya, and the version of Cantarell shipped by Ubuntu 16.04.
+ *
+ * Nuke the GDEF tables of to avoid unwanted width-zeroing.
+ *
+ * See https://bugzilla.mozilla.org/show_bug.cgi?id=1279925
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1279693
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1279875
+ */
+ switch HB_CODEPOINT_ENCODE3(blob->length,
+ face->table.GSUB->table.get_length (),
+ face->table.GPOS->table.get_length ())
+ {
+ /* sha1sum:c5ee92f0bca4bfb7d06c4d03e8cf9f9cf75d2e8a Windows 7? timesi.ttf */
+ case HB_CODEPOINT_ENCODE3 (442, 2874, 42038):
+ /* sha1sum:37fc8c16a0894ab7b749e35579856c73c840867b Windows 7? timesbi.ttf */
+ case HB_CODEPOINT_ENCODE3 (430, 2874, 40662):
+ /* sha1sum:19fc45110ea6cd3cdd0a5faca256a3797a069a80 Windows 7 timesi.ttf */
+ case HB_CODEPOINT_ENCODE3 (442, 2874, 39116):
+ /* sha1sum:6d2d3c9ed5b7de87bc84eae0df95ee5232ecde26 Windows 7 timesbi.ttf */
+ case HB_CODEPOINT_ENCODE3 (430, 2874, 39374):
+ /* sha1sum:8583225a8b49667c077b3525333f84af08c6bcd8 OS X 10.11.3 Times New Roman Italic.ttf */
+ case HB_CODEPOINT_ENCODE3 (490, 3046, 41638):
+ /* sha1sum:ec0f5a8751845355b7c3271d11f9918a966cb8c9 OS X 10.11.3 Times New Roman Bold Italic.ttf */
+ case HB_CODEPOINT_ENCODE3 (478, 3046, 41902):
+ /* sha1sum:96eda93f7d33e79962451c6c39a6b51ee893ce8c tahoma.ttf from Windows 8 */
+ case HB_CODEPOINT_ENCODE3 (898, 12554, 46470):
+ /* sha1sum:20928dc06014e0cd120b6fc942d0c3b1a46ac2bc tahomabd.ttf from Windows 8 */
+ case HB_CODEPOINT_ENCODE3 (910, 12566, 47732):
+ /* sha1sum:4f95b7e4878f60fa3a39ca269618dfde9721a79e tahoma.ttf from Windows 8.1 */
+ case HB_CODEPOINT_ENCODE3 (928, 23298, 59332):
+ /* sha1sum:6d400781948517c3c0441ba42acb309584b73033 tahomabd.ttf from Windows 8.1 */
+ case HB_CODEPOINT_ENCODE3 (940, 23310, 60732):
+ /* tahoma.ttf v6.04 from Windows 8.1 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
+ case HB_CODEPOINT_ENCODE3 (964, 23836, 60072):
+ /* tahomabd.ttf v6.04 from Windows 8.1 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
+ case HB_CODEPOINT_ENCODE3 (976, 23832, 61456):
+ /* sha1sum:e55fa2dfe957a9f7ec26be516a0e30b0c925f846 tahoma.ttf from Windows 10 */
+ case HB_CODEPOINT_ENCODE3 (994, 24474, 60336):
+ /* sha1sum:7199385abb4c2cc81c83a151a7599b6368e92343 tahomabd.ttf from Windows 10 */
+ case HB_CODEPOINT_ENCODE3 (1006, 24470, 61740):
+ /* tahoma.ttf v6.91 from Windows 10 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
+ case HB_CODEPOINT_ENCODE3 (1006, 24576, 61346):
+ /* tahomabd.ttf v6.91 from Windows 10 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
+ case HB_CODEPOINT_ENCODE3 (1018, 24572, 62828):
+ /* sha1sum:b9c84d820c49850d3d27ec498be93955b82772b5 tahoma.ttf from Windows 10 AU */
+ case HB_CODEPOINT_ENCODE3 (1006, 24576, 61352):
+ /* sha1sum:2bdfaab28174bdadd2f3d4200a30a7ae31db79d2 tahomabd.ttf from Windows 10 AU */
+ case HB_CODEPOINT_ENCODE3 (1018, 24572, 62834):
+ /* sha1sum:b0d36cf5a2fbe746a3dd277bffc6756a820807a7 Tahoma.ttf from Mac OS X 10.9 */
+ case HB_CODEPOINT_ENCODE3 (832, 7324, 47162):
+ /* sha1sum:12fc4538e84d461771b30c18b5eb6bd434e30fba Tahoma Bold.ttf from Mac OS X 10.9 */
+ case HB_CODEPOINT_ENCODE3 (844, 7302, 45474):
+ /* sha1sum:eb8afadd28e9cf963e886b23a30b44ab4fd83acc himalaya.ttf from Windows 7 */
+ case HB_CODEPOINT_ENCODE3 (180, 13054, 7254):
+ /* sha1sum:73da7f025b238a3f737aa1fde22577a6370f77b0 himalaya.ttf from Windows 8 */
+ case HB_CODEPOINT_ENCODE3 (192, 12638, 7254):
+ /* sha1sum:6e80fd1c0b059bbee49272401583160dc1e6a427 himalaya.ttf from Windows 8.1 */
+ case HB_CODEPOINT_ENCODE3 (192, 12690, 7254):
+ /* 8d9267aea9cd2c852ecfb9f12a6e834bfaeafe44 cantarell-fonts-0.0.21/otf/Cantarell-Regular.otf */
+ /* 983988ff7b47439ab79aeaf9a45bd4a2c5b9d371 cantarell-fonts-0.0.21/otf/Cantarell-Oblique.otf */
+ case HB_CODEPOINT_ENCODE3 (188, 248, 3852):
+ /* 2c0c90c6f6087ffbfea76589c93113a9cbb0e75f cantarell-fonts-0.0.21/otf/Cantarell-Bold.otf */
+ /* 55461f5b853c6da88069ffcdf7f4dd3f8d7e3e6b cantarell-fonts-0.0.21/otf/Cantarell-Bold-Oblique.otf */
+ case HB_CODEPOINT_ENCODE3 (188, 264, 3426):
+ /* d125afa82a77a6475ac0e74e7c207914af84b37a padauk-2.80/Padauk.ttf RHEL 7.2 */
+ case HB_CODEPOINT_ENCODE3 (1058, 47032, 11818):
+ /* 0f7b80437227b90a577cc078c0216160ae61b031 padauk-2.80/Padauk-Bold.ttf RHEL 7.2*/
+ case HB_CODEPOINT_ENCODE3 (1046, 47030, 12600):
+ /* d3dde9aa0a6b7f8f6a89ef1002e9aaa11b882290 padauk-2.80/Padauk.ttf Ubuntu 16.04 */
+ case HB_CODEPOINT_ENCODE3 (1058, 71796, 16770):
+ /* 5f3c98ccccae8a953be2d122c1b3a77fd805093f padauk-2.80/Padauk-Bold.ttf Ubuntu 16.04 */
+ case HB_CODEPOINT_ENCODE3 (1046, 71790, 17862):
+ /* 6c93b63b64e8b2c93f5e824e78caca555dc887c7 padauk-2.80/Padauk-book.ttf */
+ case HB_CODEPOINT_ENCODE3 (1046, 71788, 17112):
+ /* d89b1664058359b8ec82e35d3531931125991fb9 padauk-2.80/Padauk-bookbold.ttf */
+ case HB_CODEPOINT_ENCODE3 (1058, 71794, 17514):
+ /* 824cfd193aaf6234b2b4dc0cf3c6ef576c0d00ef padauk-3.0/Padauk-book.ttf */
+ case HB_CODEPOINT_ENCODE3 (1330, 109904, 57938):
+ /* 91fcc10cf15e012d27571e075b3b4dfe31754a8a padauk-3.0/Padauk-bookbold.ttf */
+ case HB_CODEPOINT_ENCODE3 (1330, 109904, 58972):
+ /* sha1sum: c26e41d567ed821bed997e937bc0c41435689e85 Padauk.ttf
+ * "Padauk Regular" "Version 2.5", see https://crbug.com/681813 */
+ case HB_CODEPOINT_ENCODE3 (1004, 59092, 14836):
+ return true;
+ }
+ return false;
}
-static inline const OT::GPOS&
-_get_gpos (hb_face_t *face)
+
+static void
+_hb_ot_layout_set_glyph_props (hb_font_t *font,
+ hb_buffer_t *buffer)
{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::GPOS);
- return *hb_ot_layout_from_face (face)->gpos;
-}
+ _hb_buffer_assert_gsubgpos_vars (buffer);
+ const OT::GDEF &gdef = *font->face->table.GDEF->table;
+ unsigned int count = buffer->len;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ _hb_glyph_info_set_glyph_props (&buffer->info[i], gdef.get_glyph_props (buffer->info[i].codepoint));
+ _hb_glyph_info_clear_lig_props (&buffer->info[i]);
+ buffer->info[i].syllable() = 0;
+ }
+}
-/*
- * GDEF
- */
+/* Public API */
+/**
+ * hb_ot_layout_has_glyph_classes:
+ * @face: #hb_face_t to work upon
+ *
+ * Tests whether a face has any glyph classes defined in its GDEF table.
+ *
+ * Return value: true if data found, false otherwise
+ *
+ **/
hb_bool_t
hb_ot_layout_has_glyph_classes (hb_face_t *face)
{
- return _get_gdef (face).has_glyph_classes ();
+ return face->table.GDEF->table->has_glyph_classes ();
}
+/**
+ * hb_ot_layout_get_glyph_class:
+ * @face: The #hb_face_t to work on
+ * @glyph: The #hb_codepoint_t code point to query
+ *
+ * Fetches the GDEF class of the requested glyph in the specified face.
+ *
+ * Return value: The #hb_ot_layout_glyph_class_t glyph class of the given code
+ * point in the GDEF table of the face.
+ *
+ * Since: 0.9.7
+ **/
hb_ot_layout_glyph_class_t
hb_ot_layout_get_glyph_class (hb_face_t *face,
hb_codepoint_t glyph)
{
- return (hb_ot_layout_glyph_class_t) _get_gdef (face).get_glyph_class (glyph);
+ return (hb_ot_layout_glyph_class_t) face->table.GDEF->table->get_glyph_class (glyph);
}
+/**
+ * hb_ot_layout_get_glyphs_in_class:
+ * @face: The #hb_face_t to work on
+ * @klass: The #hb_ot_layout_glyph_class_t GDEF class to retrieve
+ * @glyphs: (out): The #hb_set_t set of all glyphs belonging to the requested
+ * class.
+ *
+ * Retrieves the set of all glyphs from the face that belong to the requested
+ * glyph class in the face's GDEF table.
+ *
+ * Since: 0.9.7
+ **/
void
hb_ot_layout_get_glyphs_in_class (hb_face_t *face,
hb_ot_layout_glyph_class_t klass,
hb_set_t *glyphs /* OUT */)
{
- return _get_gdef (face).get_glyphs_in_class (klass, glyphs);
+ return face->table.GDEF->table->get_glyphs_in_class (klass, glyphs);
}
+#ifndef HB_NO_LAYOUT_UNUSED
+/**
+ * hb_ot_layout_get_attach_points:
+ * @face: The #hb_face_t to work on
+ * @glyph: The #hb_codepoint_t code point to query
+ * @start_offset: offset of the first attachment point to retrieve
+ * @point_count: (inout) (allow-none): Input = the maximum number of attachment points to return;
+ * Output = the actual number of attachment points returned (may be zero)
+ * @point_array: (out) (array length=point_count): The array of attachment points found for the query
+ *
+ * Fetches a list of all attachment points for the specified glyph in the GDEF
+ * table of the face. The list returned will begin at the offset provided.
+ *
+ * Useful if the client program wishes to cache the list.
+ *
+ **/
unsigned int
hb_ot_layout_get_attach_points (hb_face_t *face,
hb_codepoint_t glyph,
unsigned int *point_count /* IN/OUT */,
unsigned int *point_array /* OUT */)
{
- return _get_gdef (face).get_attach_points (glyph, start_offset, point_count, point_array);
+ return face->table.GDEF->table->get_attach_points (glyph,
+ start_offset,
+ point_count,
+ point_array);
}
-
+/**
+ * hb_ot_layout_get_ligature_carets:
+ * @font: The #hb_font_t to work on
+ * @direction: The #hb_direction_t text direction to use
+ * @glyph: The #hb_codepoint_t code point to query
+ * @start_offset: offset of the first caret position to retrieve
+ * @caret_count: (inout) (allow-none): Input = the maximum number of caret positions to return;
+ * Output = the actual number of caret positions returned (may be zero)
+ * @caret_array: (out) (array length=caret_count): The array of caret positions found for the query
+ *
+ * Fetches a list of the caret positions defined for a ligature glyph in the GDEF
+ * table of the font. The list returned will begin at the offset provided.
+ *
+ **/
unsigned int
hb_ot_layout_get_ligature_carets (hb_font_t *font,
hb_direction_t direction,
hb_codepoint_t glyph,
unsigned int start_offset,
unsigned int *caret_count /* IN/OUT */,
- int *caret_array /* OUT */)
+ hb_position_t *caret_array /* OUT */)
{
- return _get_gdef (font->face).get_lig_carets (font, direction, glyph, start_offset, caret_count, caret_array);
+ unsigned int result_caret_count = caret_count ? *caret_count : 0;
+ unsigned int result = font->face->table.GDEF->table->get_lig_carets (font, direction, glyph, start_offset, &result_caret_count, caret_array);
+ if (result)
+ {
+ if (caret_count) *caret_count = result_caret_count;
+ }
+ else
+ {
+#ifndef HB_NO_AAT
+ result = font->face->table.lcar->get_lig_carets (font, direction, glyph, start_offset, caret_count, caret_array);
+#else
+ if (caret_count) *caret_count = 0;
+#endif
+ }
+ return result;
}
+#endif
/*
* GSUB/GPOS
*/
+bool
+OT::GSUB::is_blacklisted (hb_blob_t *blob HB_UNUSED,
+ hb_face_t *face) const
+{
+#ifdef HB_NO_OT_LAYOUT_BLACKLIST
+ return false;
+#endif
+ return false;
+}
+
+bool
+OT::GPOS::is_blacklisted (hb_blob_t *blob HB_UNUSED,
+ hb_face_t *face HB_UNUSED) const
+{
+#ifdef HB_NO_OT_LAYOUT_BLACKLIST
+ return false;
+#endif
+ return false;
+}
+
static const OT::GSUBGPOS&
get_gsubgpos_table (hb_face_t *face,
hb_tag_t table_tag)
{
switch (table_tag) {
- case HB_OT_TAG_GSUB: return _get_gsub (face);
- case HB_OT_TAG_GPOS: return _get_gpos (face);
- default: return OT::Null(OT::GSUBGPOS);
+ case HB_OT_TAG_GSUB: return *face->table.GSUB->table;
+ case HB_OT_TAG_GPOS: return *face->table.GPOS->table;
+ default: return Null (OT::GSUBGPOS);
}
}
+/**
+ * hb_ot_layout_table_get_script_tags:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @start_offset: offset of the first script tag to retrieve
+ * @script_count: (inout) (allow-none): Input = the maximum number of script tags to return;
+ * Output = the actual number of script tags returned (may be zero)
+ * @script_tags: (out) (array length=script_count): The array of #hb_tag_t script tags found for the query
+ *
+ * Fetches a list of all scripts enumerated in the specified face's GSUB table
+ * or GPOS table. The list returned will begin at the offset provided.
+ *
+ **/
unsigned int
hb_ot_layout_table_get_script_tags (hb_face_t *face,
hb_tag_t table_tag,
unsigned int start_offset,
unsigned int *script_count /* IN/OUT */,
- hb_tag_t *script_tags /* OUT */)
+ hb_tag_t *script_tags /* OUT */)
{
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
#define HB_OT_TAG_LATIN_SCRIPT HB_TAG ('l', 'a', 't', 'n')
+/**
+ * hb_ot_layout_table_find_script:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_tag: #hb_tag_t of the script tag requested
+ * @script_index: (out): The index of the requested script tag
+ *
+ * Fetches the index if a given script tag in the specified face's GSUB table
+ * or GPOS table.
+ *
+ * Return value: true if the script is found, false otherwise
+ *
+ **/
hb_bool_t
hb_ot_layout_table_find_script (hb_face_t *face,
hb_tag_t table_tag,
hb_tag_t script_tag,
- unsigned int *script_index)
+ unsigned int *script_index /* OUT */)
{
- ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
+ static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX), "");
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
if (g.find_script_index (script_tag, script_index))
return false;
}
+#ifndef HB_DISABLE_DEPRECATED
+/**
+ * hb_ot_layout_table_choose_script:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_tags: Array of #hb_tag_t script tags
+ * @script_index: (out): The index of the requested script tag
+ * @chosen_script: (out): #hb_tag_t of the script tag requested
+ *
+ * Deprecated since 2.0.0
+ **/
hb_bool_t
hb_ot_layout_table_choose_script (hb_face_t *face,
hb_tag_t table_tag,
const hb_tag_t *script_tags,
- unsigned int *script_index,
- hb_tag_t *chosen_script)
+ unsigned int *script_index /* OUT */,
+ hb_tag_t *chosen_script /* OUT */)
{
- ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
+ const hb_tag_t *t;
+ for (t = script_tags; *t; t++);
+ return hb_ot_layout_table_select_script (face, table_tag, t - script_tags, script_tags, script_index, chosen_script);
+}
+#endif
+
+/**
+ * hb_ot_layout_table_select_script:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_count: Number of script tags in the array
+ * @script_tags: Array of #hb_tag_t script tags
+ * @script_index: (out): The index of the requested script
+ * @chosen_script: (out): #hb_tag_t of the requested script
+ *
+ * Since: 2.0.0
+ **/
+hb_bool_t
+hb_ot_layout_table_select_script (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_count,
+ const hb_tag_t *script_tags,
+ unsigned int *script_index /* OUT */,
+ hb_tag_t *chosen_script /* OUT */)
+{
+ static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX), "");
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ unsigned int i;
- while (*script_tags)
+ for (i = 0; i < script_count; i++)
{
- if (g.find_script_index (*script_tags, script_index)) {
+ if (g.find_script_index (script_tags[i], script_index))
+ {
if (chosen_script)
- *chosen_script = *script_tags;
+ *chosen_script = script_tags[i];
return true;
}
- script_tags++;
}
/* try finding 'DFLT' */
return false;
}
+
+/**
+ * hb_ot_layout_table_get_feature_tags:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @start_offset: offset of the first feature tag to retrieve
+ * @feature_count: (inout) (allow-none): Input = the maximum number of feature tags to return;
+ * Output = the actual number of feature tags returned (may be zero)
+ * @feature_tags: (out) (array length=feature_count): Array of feature tags found in the table
+ *
+ * Fetches a list of all feature tags in the given face's GSUB or GPOS table.
+ *
+ **/
unsigned int
hb_ot_layout_table_get_feature_tags (hb_face_t *face,
hb_tag_t table_tag,
unsigned int start_offset,
unsigned int *feature_count /* IN/OUT */,
- hb_tag_t *feature_tags /* OUT */)
+ hb_tag_t *feature_tags /* OUT */)
{
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
}
+/**
+ * hb_ot_layout_table_find_feature:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @feature_tag: The #hb_tag_t og the requested feature tag
+ * @feature_index: (out): The index of the requested feature
+ *
+ * Fetches the index for a given feature tag in the specified face's GSUB table
+ * or GPOS table.
+ *
+ * Return value: true if the feature is found, false otherwise
+ **/
+bool
+hb_ot_layout_table_find_feature (hb_face_t *face,
+ hb_tag_t table_tag,
+ hb_tag_t feature_tag,
+ unsigned int *feature_index /* OUT */)
+{
+ static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX), "");
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+
+ unsigned int num_features = g.get_feature_count ();
+ for (unsigned int i = 0; i < num_features; i++)
+ {
+ if (feature_tag == g.get_feature_tag (i)) {
+ if (feature_index) *feature_index = i;
+ return true;
+ }
+ }
+
+ if (feature_index) *feature_index = HB_OT_LAYOUT_NO_FEATURE_INDEX;
+ return false;
+}
+
+
+/**
+ * hb_ot_layout_script_get_language_tags:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @start_offset: offset of the first language tag to retrieve
+ * @language_count: (inout) (allow-none): Input = the maximum number of language tags to return;
+ * Output = the actual number of language tags returned (may be zero)
+ * @language_tags: (out) (array length=language_count): Array of language tags found in the table
+ *
+ * Fetches a list of language tags in the given face's GSUB or GPOS table, underneath
+ * the specified script index. The list returned will begin at the offset provided.
+ *
+ **/
unsigned int
hb_ot_layout_script_get_language_tags (hb_face_t *face,
hb_tag_t table_tag,
unsigned int script_index,
unsigned int start_offset,
unsigned int *language_count /* IN/OUT */,
- hb_tag_t *language_tags /* OUT */)
+ hb_tag_t *language_tags /* OUT */)
{
const OT::Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
return s.get_lang_sys_tags (start_offset, language_count, language_tags);
}
+
+#ifndef HB_DISABLE_DEPRECATED
+/**
+ * hb_ot_layout_script_find_language:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @language_tag: The #hb_tag_t of the requested language
+ * @language_index: The index of the requested language
+ *
+ * Fetches the index of a given language tag in the specified face's GSUB table
+ * or GPOS table, underneath the specified script tag.
+ *
+ * Return value: true if the language tag is found, false otherwise
+ *
+ * Since: ??
+ * Deprecated: ??
+ **/
hb_bool_t
hb_ot_layout_script_find_language (hb_face_t *face,
hb_tag_t table_tag,
hb_tag_t language_tag,
unsigned int *language_index)
{
- ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX);
+ return hb_ot_layout_script_select_language (face,
+ table_tag,
+ script_index,
+ 1,
+ &language_tag,
+ language_index);
+}
+#endif
+
+
+/**
+ * hb_ot_layout_script_select_language:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @language_count: The number of languages in the specified script
+ * @language_tags: The array of language tags
+ * @language_index: (out): The index of the requested language
+ *
+ * Fetches the index of a given language tag in the specified face's GSUB table
+ * or GPOS table, underneath the specified script index.
+ *
+ * Return value: true if the language tag is found, false otherwise
+ *
+ * Since: 2.0.0
+ **/
+hb_bool_t
+hb_ot_layout_script_select_language (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_count,
+ const hb_tag_t *language_tags,
+ unsigned int *language_index /* OUT */)
+{
+ static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX), "");
const OT::Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
+ unsigned int i;
- if (s.find_lang_sys_index (language_tag, language_index))
- return true;
+ for (i = 0; i < language_count; i++)
+ {
+ if (s.find_lang_sys_index (language_tags[i], language_index))
+ return true;
+ }
- /* try with 'dflt'; MS site has had typos and many fonts use it now :( */
+ /* try finding 'dflt' */
if (s.find_lang_sys_index (HB_OT_TAG_DEFAULT_LANGUAGE, language_index))
return false;
return false;
}
+
+/**
+ * hb_ot_layout_language_get_required_feature_index:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @language_index: The index of the requested language tag
+ * @feature_index: (out): The index of the requested feature
+ *
+ * Fetches the index of a requested feature in the given face's GSUB or GPOS table,
+ * underneath the specified script and language.
+ *
+ * Return value: true if the feature is found, false otherwise
+ *
+ **/
hb_bool_t
hb_ot_layout_language_get_required_feature_index (hb_face_t *face,
hb_tag_t table_tag,
unsigned int script_index,
unsigned int language_index,
- unsigned int *feature_index)
+ unsigned int *feature_index /* OUT */)
+{
+ return hb_ot_layout_language_get_required_feature (face,
+ table_tag,
+ script_index,
+ language_index,
+ feature_index,
+ nullptr);
+}
+
+
+/**
+ * hb_ot_layout_language_get_required_feature:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @language_index: The index of the requested language tag
+ * @feature_index: (out): The index of the requested feature
+ * @feature_tag: (out): The #hb_tag_t of the requested feature
+ *
+ * Fetches the tag of a requested feature index in the given face's GSUB or GPOS table,
+ * underneath the specified script and language.
+ *
+ * Return value: true if the feature is found, false otherwise
+ *
+ * Since: 0.9.30
+ **/
+hb_bool_t
+hb_ot_layout_language_get_required_feature (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int *feature_index /* OUT */,
+ hb_tag_t *feature_tag /* OUT */)
{
- const OT::LangSys &l = get_gsubgpos_table (face, table_tag).get_script (script_index).get_lang_sys (language_index);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
- if (feature_index) *feature_index = l.get_required_feature_index ();
+ unsigned int index = l.get_required_feature_index ();
+ if (feature_index) *feature_index = index;
+ if (feature_tag) *feature_tag = g.get_feature_tag (index);
return l.has_required_feature ();
}
+
+/**
+ * hb_ot_layout_language_get_feature_indexes:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @language_index: The index of the requested language tag
+ * @start_offset: offset of the first feature tag to retrieve
+ * @feature_count: (inout) (allow-none): Input = the maximum number of feature tags to return;
+ * Output: the actual number of feature tags returned (may be zero)
+ * @feature_indexes: (out) (array length=feature_count): The array of feature indexes found for the query
+ *
+ * Fetches a list of all features in the specified face's GSUB table
+ * or GPOS table, underneath the specified script and language. The list
+ * returned will begin at the offset provided.
+ **/
unsigned int
hb_ot_layout_language_get_feature_indexes (hb_face_t *face,
hb_tag_t table_tag,
unsigned int script_index,
unsigned int language_index,
unsigned int start_offset,
- unsigned int *feature_count /* IN/OUT */,
+ unsigned int *feature_count /* IN/OUT */,
unsigned int *feature_indexes /* OUT */)
{
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
return l.get_feature_indexes (start_offset, feature_count, feature_indexes);
}
+
+/**
+ * hb_ot_layout_language_get_feature_tags:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @language_index: The index of the requested language tag
+ * @start_offset: offset of the first feature tag to retrieve
+ * @feature_count: (inout) (allow-none): Input = the maximum number of feature tags to return;
+ * Output = the actual number of feature tags returned (may be zero)
+ * @feature_tags: (out) (array length=feature_count): The array of #hb_tag_t feature tags found for the query
+ *
+ * Fetches a list of all features in the specified face's GSUB table
+ * or GPOS table, underneath the specified script and language. The list
+ * returned will begin at the offset provided.
+ *
+ **/
unsigned int
hb_ot_layout_language_get_feature_tags (hb_face_t *face,
hb_tag_t table_tag,
unsigned int language_index,
unsigned int start_offset,
unsigned int *feature_count /* IN/OUT */,
- hb_tag_t *feature_tags /* OUT */)
+ hb_tag_t *feature_tags /* OUT */)
{
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
- ASSERT_STATIC (sizeof (unsigned int) == sizeof (hb_tag_t));
+ static_assert ((sizeof (unsigned int) == sizeof (hb_tag_t)), "");
unsigned int ret = l.get_feature_indexes (start_offset, feature_count, (unsigned int *) feature_tags);
if (feature_tags) {
}
+/**
+ * hb_ot_layout_language_find_feature:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @script_index: The index of the requested script tag
+ * @language_index: The index of the requested language tag
+ * @feature_tag: #hb_tag_t of the feature tag requested
+ * @feature_index: (out): The index of the requested feature
+ *
+ * Fetches the index of a given feature tag in the specified face's GSUB table
+ * or GPOS table, underneath the specified script and language.
+ *
+ * Return value: true if the feature is found, false otherwise
+ *
+ **/
hb_bool_t
hb_ot_layout_language_find_feature (hb_face_t *face,
hb_tag_t table_tag,
unsigned int script_index,
unsigned int language_index,
hb_tag_t feature_tag,
- unsigned int *feature_index)
+ unsigned int *feature_index /* OUT */)
{
- ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX);
+ static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX), "");
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
return false;
}
+
+/**
+ * hb_ot_layout_feature_get_lookups:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @feature_index: The index of the requested feature
+ * @start_offset: offset of the first lookup to retrieve
+ * @lookup_count: (inout) (allow-none): Input = the maximum number of lookups to return;
+ * Output = the actual number of lookups returned (may be zero)
+ * @lookup_indexes: (out) (array length=lookup_count): The array of lookup indexes found for the query
+ *
+ * Fetches a list of all lookups enumerated for the specified feature, in
+ * the specified face's GSUB table or GPOS table. The list returned will
+ * begin at the offset provided.
+ *
+ * Since: 0.9.7
+ **/
unsigned int
hb_ot_layout_feature_get_lookups (hb_face_t *face,
hb_tag_t table_tag,
unsigned int feature_index,
unsigned int start_offset,
- unsigned int *lookup_count /* IN/OUT */,
+ unsigned int *lookup_count /* IN/OUT */,
unsigned int *lookup_indexes /* OUT */)
{
- const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- const OT::Feature &f = g.get_feature (feature_index);
+ return hb_ot_layout_feature_with_variations_get_lookups (face,
+ table_tag,
+ feature_index,
+ HB_OT_LAYOUT_NO_VARIATIONS_INDEX,
+ start_offset,
+ lookup_count,
+ lookup_indexes);
+}
- return f.get_lookup_indexes (start_offset, lookup_count, lookup_indexes);
+
+/**
+ * hb_ot_layout_table_get_lookup_count:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ *
+ * Fetches the total number of lookups enumerated in the specified
+ * face's GSUB table or GPOS table.
+ *
+ * Since: 0.9.22
+ **/
+unsigned int
+hb_ot_layout_table_get_lookup_count (hb_face_t *face,
+ hb_tag_t table_tag)
+{
+ return get_gsubgpos_table (face, table_tag).get_lookup_count ();
}
-static void
-_hb_ot_layout_collect_lookups_lookups (hb_face_t *face,
- hb_tag_t table_tag,
- unsigned int feature_index,
- hb_set_t *lookup_indexes /* OUT */)
+
+struct hb_collect_features_context_t
{
- unsigned int lookup_indices[32];
- unsigned int offset, len;
+ hb_collect_features_context_t (hb_face_t *face,
+ hb_tag_t table_tag,
+ hb_set_t *feature_indexes_)
+ : g (get_gsubgpos_table (face, table_tag)),
+ feature_indexes (feature_indexes_),
+ script_count (0),langsys_count (0), feature_index_count (0) {}
+
+ bool visited (const OT::Script &s)
+ {
+ /* We might have Null() object here. Don't want to involve
+ * that in the memoize. So, detect empty objects and return. */
+ if (unlikely (!s.has_default_lang_sys () &&
+ !s.get_lang_sys_count ()))
+ return true;
- offset = 0;
- do {
- len = ARRAY_LENGTH (lookup_indices);
- hb_ot_layout_feature_get_lookups (face,
- table_tag,
- feature_index,
- offset, &len,
- lookup_indices);
+ if (script_count++ > HB_MAX_SCRIPTS)
+ return true;
- for (unsigned int i = 0; i < len; i++)
- lookup_indexes->add (lookup_indices[i]);
+ return visited (s, visited_script);
+ }
+ bool visited (const OT::LangSys &l)
+ {
+ /* We might have Null() object here. Don't want to involve
+ * that in the memoize. So, detect empty objects and return. */
+ if (unlikely (!l.has_required_feature () &&
+ !l.get_feature_count ()))
+ return true;
- offset += len;
- } while (len == ARRAY_LENGTH (lookup_indices));
-}
+ if (langsys_count++ > HB_MAX_LANGSYS)
+ return true;
+
+ return visited (l, visited_langsys);
+ }
+
+ bool visited_feature_indices (unsigned count)
+ {
+ feature_index_count += count;
+ return feature_index_count > HB_MAX_FEATURE_INDICES;
+ }
+
+ private:
+ template <typename T>
+ bool visited (const T &p, hb_set_t &visited_set)
+ {
+ hb_codepoint_t delta = (hb_codepoint_t) ((uintptr_t) &p - (uintptr_t) &g);
+ if (visited_set.has (delta))
+ return true;
+
+ visited_set.add (delta);
+ return false;
+ }
+
+ public:
+ const OT::GSUBGPOS &g;
+ hb_set_t *feature_indexes;
+
+ private:
+ hb_set_t visited_script;
+ hb_set_t visited_langsys;
+ unsigned int script_count;
+ unsigned int langsys_count;
+ unsigned int feature_index_count;
+};
static void
-_hb_ot_layout_collect_lookups_features (hb_face_t *face,
- hb_tag_t table_tag,
- unsigned int script_index,
- unsigned int language_index,
- const hb_tag_t *features,
- hb_set_t *lookup_indexes /* OUT */)
-{
- unsigned int required_feature_index;
- if (hb_ot_layout_language_get_required_feature_index (face,
- table_tag,
- script_index,
- language_index,
- &required_feature_index))
- _hb_ot_layout_collect_lookups_lookups (face,
- table_tag,
- required_feature_index,
- lookup_indexes);
+langsys_collect_features (hb_collect_features_context_t *c,
+ const OT::LangSys &l,
+ const hb_tag_t *features)
+{
+ if (c->visited (l)) return;
if (!features)
{
- /* All features */
- unsigned int feature_indices[32];
- unsigned int offset, len;
-
- offset = 0;
- do {
- len = ARRAY_LENGTH (feature_indices);
- hb_ot_layout_language_get_feature_indexes (face,
- table_tag,
- script_index,
- language_index,
- offset, &len,
- feature_indices);
-
- for (unsigned int i = 0; i < len; i++)
- _hb_ot_layout_collect_lookups_lookups (face,
- table_tag,
- feature_indices[i],
- lookup_indexes);
-
- offset += len;
- } while (len == ARRAY_LENGTH (feature_indices));
+ /* All features. */
+ if (l.has_required_feature () && !c->visited_feature_indices (1))
+ c->feature_indexes->add (l.get_required_feature_index ());
+
+ if (!c->visited_feature_indices (l.featureIndex.len))
+ l.add_feature_indexes_to (c->feature_indexes);
}
else
{
+ /* Ugh. Any faster way? */
for (; *features; features++)
{
- unsigned int feature_index;
- if (hb_ot_layout_language_find_feature (face,
- table_tag,
- script_index,
- language_index,
- *features,
- &feature_index))
- _hb_ot_layout_collect_lookups_lookups (face,
- table_tag,
- feature_index,
- lookup_indexes);
+ hb_tag_t feature_tag = *features;
+ unsigned int num_features = l.get_feature_count ();
+ for (unsigned int i = 0; i < num_features; i++)
+ {
+ unsigned int feature_index = l.get_feature_index (i);
+
+ if (feature_tag == c->g.get_feature_tag (feature_index))
+ {
+ c->feature_indexes->add (feature_index);
+ break;
+ }
+ }
}
}
}
static void
-_hb_ot_layout_collect_lookups_languages (hb_face_t *face,
- hb_tag_t table_tag,
- unsigned int script_index,
- const hb_tag_t *languages,
- const hb_tag_t *features,
- hb_set_t *lookup_indexes /* OUT */)
-{
- _hb_ot_layout_collect_lookups_features (face,
- table_tag,
- script_index,
- HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX,
- features,
- lookup_indexes);
+script_collect_features (hb_collect_features_context_t *c,
+ const OT::Script &s,
+ const hb_tag_t *languages,
+ const hb_tag_t *features)
+{
+ if (c->visited (s)) return;
if (!languages)
{
- /* All languages */
- unsigned int count = hb_ot_layout_script_get_language_tags (face,
- table_tag,
- script_index,
- 0, NULL, NULL);
+ /* All languages. */
+ if (s.has_default_lang_sys ())
+ langsys_collect_features (c,
+ s.get_default_lang_sys (),
+ features);
+
+ unsigned int count = s.get_lang_sys_count ();
for (unsigned int language_index = 0; language_index < count; language_index++)
- _hb_ot_layout_collect_lookups_features (face,
- table_tag,
- script_index,
- language_index,
- features,
- lookup_indexes);
+ langsys_collect_features (c,
+ s.get_lang_sys (language_index),
+ features);
}
else
{
for (; *languages; languages++)
{
unsigned int language_index;
- if (hb_ot_layout_script_find_language (face,
- table_tag,
- script_index,
- *languages,
- &language_index))
- _hb_ot_layout_collect_lookups_features (face,
- table_tag,
- script_index,
- language_index,
- features,
- lookup_indexes);
+ if (s.find_lang_sys_index (*languages, &language_index))
+ langsys_collect_features (c,
+ s.get_lang_sys (language_index),
+ features);
}
}
}
+
+/**
+ * hb_ot_layout_collect_features:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @scripts: The array of scripts to collect features for
+ * @languages: The array of languages to collect features for
+ * @features: The array of features to collect
+ * @feature_indexes: (out): The array of feature indexes found for the query
+ *
+ * Fetches a list of all feature indexes in the specified face's GSUB table
+ * or GPOS table, underneath the specified scripts, languages, and features.
+ * If no list of scripts is provided, all scripts will be queried. If no list
+ * of languages is provided, all languages will be queried. If no list of
+ * features is provided, all features will be queried.
+ *
+ * Since: 1.8.5
+ **/
void
-hb_ot_layout_collect_lookups (hb_face_t *face,
- hb_tag_t table_tag,
- const hb_tag_t *scripts,
- const hb_tag_t *languages,
- const hb_tag_t *features,
- hb_set_t *lookup_indexes /* OUT */)
+hb_ot_layout_collect_features (hb_face_t *face,
+ hb_tag_t table_tag,
+ const hb_tag_t *scripts,
+ const hb_tag_t *languages,
+ const hb_tag_t *features,
+ hb_set_t *feature_indexes /* OUT */)
{
+ hb_collect_features_context_t c (face, table_tag, feature_indexes);
if (!scripts)
{
- /* All scripts */
- unsigned int count = hb_ot_layout_table_get_script_tags (face,
- table_tag,
- 0, NULL, NULL);
+ /* All scripts. */
+ unsigned int count = c.g.get_script_count ();
for (unsigned int script_index = 0; script_index < count; script_index++)
- _hb_ot_layout_collect_lookups_languages (face,
- table_tag,
- script_index,
- languages,
- features,
- lookup_indexes);
+ script_collect_features (&c,
+ c.g.get_script (script_index),
+ languages,
+ features);
}
else
{
for (; *scripts; scripts++)
{
unsigned int script_index;
- if (hb_ot_layout_table_find_script (face,
- table_tag,
- *scripts,
- &script_index))
- _hb_ot_layout_collect_lookups_languages (face,
- table_tag,
- script_index,
- languages,
- features,
- lookup_indexes);
+ if (c.g.find_script_index (*scripts, &script_index))
+ script_collect_features (&c,
+ c.g.get_script (script_index),
+ languages,
+ features);
}
}
}
+
+/**
+ * hb_ot_layout_collect_lookups:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @scripts: The array of scripts to collect lookups for
+ * @languages: The array of languages to collect lookups for
+ * @features: The array of features to collect lookups for
+ * @lookup_indexes: (out): The array of lookup indexes found for the query
+ *
+ * Fetches a list of all feature-lookup indexes in the specified face's GSUB
+ * table or GPOS table, underneath the specified scripts, languages, and
+ * features. If no list of scripts is provided, all scripts will be queried.
+ * If no list of languages is provided, all languages will be queried. If no
+ * list of features is provided, all features will be queried.
+ *
+ * Since: 0.9.8
+ **/
+void
+hb_ot_layout_collect_lookups (hb_face_t *face,
+ hb_tag_t table_tag,
+ const hb_tag_t *scripts,
+ const hb_tag_t *languages,
+ const hb_tag_t *features,
+ hb_set_t *lookup_indexes /* OUT */)
+{
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+
+ hb_set_t feature_indexes;
+ hb_ot_layout_collect_features (face, table_tag, scripts, languages, features, &feature_indexes);
+
+ for (hb_codepoint_t feature_index = HB_SET_VALUE_INVALID;
+ hb_set_next (&feature_indexes, &feature_index);)
+ g.get_feature (feature_index).add_lookup_indexes_to (lookup_indexes);
+
+ g.feature_variation_collect_lookups (&feature_indexes, lookup_indexes);
+}
+
+#ifdef HB_EXPERIMENTAL_API
+/**
+ * hb_ot_layout_closure_lookups:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @lookup_indexes: (inout): lookup_indices collected from feature
+ * list
+ *
+ * Returns all inactive lookups reachable from lookup_indices
+ *
+ * Since: EXPERIMENTAL
+ **/
+void
+hb_ot_layout_closure_lookups (hb_face_t *face,
+ hb_tag_t table_tag,
+ const hb_set_t *glyphs,
+ hb_set_t *lookup_indexes /* IN/OUT */)
+{
+ hb_set_t visited_lookups, inactive_lookups;
+ OT::hb_closure_lookups_context_t c (face, glyphs, &visited_lookups, &inactive_lookups);
+
+ for (unsigned lookup_index : + hb_iter (lookup_indexes))
+ {
+ switch (table_tag)
+ {
+ case HB_OT_TAG_GSUB:
+ {
+ const OT::SubstLookup& l = face->table.GSUB->table->get_lookup (lookup_index);
+ l.closure_lookups (&c, lookup_index);
+ break;
+ }
+ case HB_OT_TAG_GPOS:
+ {
+ const OT::PosLookup& l = face->table.GPOS->table->get_lookup (lookup_index);
+ l.closure_lookups (&c, lookup_index);
+ break;
+ }
+ }
+ }
+
+ hb_set_union (lookup_indexes, &visited_lookups);
+ hb_set_subtract (lookup_indexes, &inactive_lookups);
+}
+
+/**
+ * hb_ot_layout_closure_features:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @lookup_indexes: (in): collected active lookup_indices
+ * @feature_indexes: (out): all active feature indexes collected
+ *
+ * Returns all active feature indexes
+ *
+ * Since: EXPERIMENTAL
+ **/
+void
+hb_ot_layout_closure_features (hb_face_t *face,
+ hb_tag_t table_tag,
+ const hb_map_t *lookup_indexes, /* IN */
+ hb_set_t *feature_indexes /* OUT */)
+{
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ g.closure_features (lookup_indexes, feature_indexes);
+}
+#endif
+
+
+#ifndef HB_NO_LAYOUT_COLLECT_GLYPHS
+/**
+ * hb_ot_layout_lookup_collect_glyphs:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @lookup_index: The index of the feature lookup to query
+ * @glyphs_before: (out): Array of glyphs preceding the substitution range
+ * @glyphs_input: (out): Array of input glyphs that would be substituted by the lookup
+ * @glyphs_after: (out): Array of glyphs following the substitution range
+ * @glyphs_output: (out): Array of glyphs that would be the substitued output of the lookup
+ *
+ * Fetches a list of all glyphs affected by the specified lookup in the
+ * specified face's GSUB table or GPOS table.
+ *
+ * Since: 0.9.7
+ **/
void
hb_ot_layout_lookup_collect_glyphs (hb_face_t *face,
hb_tag_t table_tag,
unsigned int lookup_index,
- hb_set_t *glyphs_before, /* OUT. May be NULL */
- hb_set_t *glyphs_input, /* OUT. May be NULL */
- hb_set_t *glyphs_after, /* OUT. May be NULL */
- hb_set_t *glyphs_output /* OUT. May be NULL */)
+ hb_set_t *glyphs_before, /* OUT. May be NULL */
+ hb_set_t *glyphs_input, /* OUT. May be NULL */
+ hb_set_t *glyphs_after, /* OUT. May be NULL */
+ hb_set_t *glyphs_output /* OUT. May be NULL */)
{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return;
-
OT::hb_collect_glyphs_context_t c (face,
glyphs_before,
glyphs_input,
{
case HB_OT_TAG_GSUB:
{
- const OT::SubstLookup& l = hb_ot_layout_from_face (face)->gsub->get_lookup (lookup_index);
- l.collect_glyphs_lookup (&c);
+ const OT::SubstLookup& l = face->table.GSUB->table->get_lookup (lookup_index);
+ l.collect_glyphs (&c);
return;
}
case HB_OT_TAG_GPOS:
{
- const OT::PosLookup& l = hb_ot_layout_from_face (face)->gpos->get_lookup (lookup_index);
- l.collect_glyphs_lookup (&c);
+ const OT::PosLookup& l = face->table.GPOS->table->get_lookup (lookup_index);
+ l.collect_glyphs (&c);
return;
}
}
}
+#endif
+
+
+/* Variations support */
+
+
+/**
+ * hb_ot_layout_table_find_feature_variations:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @coords: The variation coordinates to query
+ * @num_coords: The number of variation coorinates
+ * @variations_index: (out): The array of feature variations found for the query
+ *
+ * Fetches a list of feature variations in the specified face's GSUB table
+ * or GPOS table, at the specified variation coordinates.
+ *
+ **/
+hb_bool_t
+hb_ot_layout_table_find_feature_variations (hb_face_t *face,
+ hb_tag_t table_tag,
+ const int *coords,
+ unsigned int num_coords,
+ unsigned int *variations_index /* out */)
+{
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+
+ return g.find_variations_index (coords, num_coords, variations_index);
+}
+
+
+/**
+ * hb_ot_layout_feature_with_variations_get_lookups:
+ * @face: #hb_face_t to work upon
+ * @table_tag: HB_OT_TAG_GSUB or HB_OT_TAG_GPOS
+ * @feature_index: The index of the feature to query
+ * @variations_index: The index of the feature variation to query
+ * @start_offset: offset of the first lookup to retrieve
+ * @lookup_count: (inout) (allow-none): Input = the maximum number of lookups to return;
+ * Output = the actual number of lookups returned (may be zero)
+ * @lookup_indexes: (out) (array length=lookup_count): The array of lookups found for the query
+ *
+ * Fetches a list of all lookups enumerated for the specified feature, in
+ * the specified face's GSUB table or GPOS table, enabled at the specified
+ * variations index. The list returned will begin at the offset provided.
+ *
+ **/
+unsigned int
+hb_ot_layout_feature_with_variations_get_lookups (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int feature_index,
+ unsigned int variations_index,
+ unsigned int start_offset,
+ unsigned int *lookup_count /* IN/OUT */,
+ unsigned int *lookup_indexes /* OUT */)
+{
+ static_assert ((OT::FeatureVariations::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_VARIATIONS_INDEX), "");
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+
+ const OT::Feature &f = g.get_feature_variation (feature_index, variations_index);
+
+ return f.get_lookup_indexes (start_offset, lookup_count, lookup_indexes);
+}
/*
* OT::GSUB
*/
+
+/**
+ * hb_ot_layout_has_substitution:
+ * @face: #hb_face_t to work upon
+ *
+ * Tests whether the specified face includes any GSUB substitutions.
+ *
+ * Return value: true if data found, false otherwise
+ *
+ **/
hb_bool_t
hb_ot_layout_has_substitution (hb_face_t *face)
{
- return &_get_gsub (face) != &OT::Null(OT::GSUB);
+ return face->table.GSUB->table->has_data ();
}
+
+/**
+ * hb_ot_layout_lookup_would_substitute:
+ * @face: #hb_face_t to work upon
+ * @lookup_index: The index of the lookup to query
+ * @glyphs: The sequence of glyphs to query for substitution
+ * @glyphs_length: The length of the glyph sequence
+ * @zero_context: #hb_bool_t indicating whether substitutions should be context-free
+ *
+ * Tests whether a specified lookup in the specified face would
+ * trigger a substitution on the given glyph sequence.
+ *
+ * Return value: true if a substitution would be triggered, false otherwise
+ *
+ * Since: 0.9.7
+ **/
hb_bool_t
hb_ot_layout_lookup_would_substitute (hb_face_t *face,
unsigned int lookup_index,
unsigned int glyphs_length,
hb_bool_t zero_context)
{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return false;
- return hb_ot_layout_lookup_would_substitute_fast (face, lookup_index, glyphs, glyphs_length, zero_context);
-}
-
-hb_bool_t
-hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
- unsigned int lookup_index,
- const hb_codepoint_t *glyphs,
- unsigned int glyphs_length,
- hb_bool_t zero_context)
-{
- if (unlikely (lookup_index >= hb_ot_layout_from_face (face)->gsub_lookup_count)) return false;
- OT::hb_would_apply_context_t c (face, glyphs, glyphs_length, zero_context);
+ if (unlikely (lookup_index >= face->table.GSUB->lookup_count)) return false;
+ OT::hb_would_apply_context_t c (face, glyphs, glyphs_length, (bool) zero_context);
- const OT::SubstLookup& l = hb_ot_layout_from_face (face)->gsub->get_lookup (lookup_index);
+ const OT::SubstLookup& l = face->table.GSUB->table->get_lookup (lookup_index);
- return l.would_apply (&c, &hb_ot_layout_from_face (face)->gsub_digests[lookup_index]);
+ return l.would_apply (&c, &face->table.GSUB->accels[lookup_index]);
}
+
+/**
+ * hb_ot_layout_substitute_start:
+ * @font: #hb_font_t to use
+ * @buffer: #hb_buffer_t buffer to work upon
+ *
+ * Called before substitution lookups are performed, to ensure that glyph
+ * class and other properties are set on the glyphs in the buffer.
+ *
+ **/
void
-hb_ot_layout_substitute_start (hb_font_t *font, hb_buffer_t *buffer)
+hb_ot_layout_substitute_start (hb_font_t *font,
+ hb_buffer_t *buffer)
{
- OT::GSUB::substitute_start (font, buffer);
+_hb_ot_layout_set_glyph_props (font, buffer);
}
-hb_bool_t
-hb_ot_layout_substitute_lookup (hb_font_t *font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_mask_t mask)
+void
+hb_ot_layout_delete_glyphs_inplace (hb_buffer_t *buffer,
+ bool (*filter) (const hb_glyph_info_t *info))
{
- if (unlikely (lookup_index >= hb_ot_layout_from_face (font->face)->gsub_lookup_count)) return false;
+ /* Merge clusters and delete filtered glyphs.
+ * NOTE! We can't use out-buffer as we have positioning data. */
+ unsigned int j = 0;
+ unsigned int count = buffer->len;
+ hb_glyph_info_t *info = buffer->info;
+ hb_glyph_position_t *pos = buffer->pos;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ if (filter (&info[i]))
+ {
+ /* Merge clusters.
+ * Same logic as buffer->delete_glyph(), but for in-place removal. */
+
+ unsigned int cluster = info[i].cluster;
+ if (i + 1 < count && cluster == info[i + 1].cluster)
+ continue; /* Cluster survives; do nothing. */
- OT::hb_apply_context_t c (font, buffer, mask);
+ if (j)
+ {
+ /* Merge cluster backward. */
+ if (cluster < info[j - 1].cluster)
+ {
+ unsigned int mask = info[i].mask;
+ unsigned int old_cluster = info[j - 1].cluster;
+ for (unsigned k = j; k && info[k - 1].cluster == old_cluster; k--)
+ buffer->set_cluster (info[k - 1], cluster, mask);
+ }
+ continue;
+ }
- const OT::SubstLookup& l = hb_ot_layout_from_face (font->face)->gsub->get_lookup (lookup_index);
+ if (i + 1 < count)
+ buffer->merge_clusters (i, i + 2); /* Merge cluster forward. */
- return l.apply_string (&c, &hb_ot_layout_from_face (font->face)->gsub_digests[lookup_index]);
+ continue;
+ }
+
+ if (j != i)
+ {
+ info[j] = info[i];
+ pos[j] = pos[i];
+ }
+ j++;
+ }
+ buffer->len = j;
}
+/**
+ * hb_ot_layout_lookup_substitute_closure:
+ * @face: #hb_face_t to work upon
+ * @lookup_index: index of the feature lookup to query
+ * @glyphs: (out): Array of glyphs comprising the transitive closure of the lookup
+ *
+ * Compute the transitive closure of glyphs needed for a
+ * specified lookup.
+ *
+ * Since: 0.9.7
+ **/
void
-hb_ot_layout_substitute_finish (hb_font_t *font, hb_buffer_t *buffer)
+hb_ot_layout_lookup_substitute_closure (hb_face_t *face,
+ unsigned int lookup_index,
+ hb_set_t *glyphs /* OUT */)
{
- OT::GSUB::substitute_finish (font, buffer);
+ hb_map_t done_lookups;
+ OT::hb_closure_context_t c (face, glyphs, &done_lookups);
+
+ const OT::SubstLookup& l = face->table.GSUB->table->get_lookup (lookup_index);
+
+ l.closure (&c, lookup_index);
}
+/**
+ * hb_ot_layout_lookups_substitute_closure:
+ * @face: #hb_face_t to work upon
+ * @lookups: The set of lookups to query
+ * @glyphs: (out): Array of glyphs comprising the transitive closure of the lookups
+ *
+ * Compute the transitive closure of glyphs needed for all of the
+ * provided lookups.
+ *
+ * Since: 1.8.1
+ **/
void
-hb_ot_layout_lookup_substitute_closure (hb_face_t *face,
- unsigned int lookup_index,
- hb_set_t *glyphs)
+hb_ot_layout_lookups_substitute_closure (hb_face_t *face,
+ const hb_set_t *lookups,
+ hb_set_t *glyphs /* OUT */)
{
- OT::hb_closure_context_t c (face, glyphs);
-
- const OT::SubstLookup& l = _get_gsub (face).get_lookup (lookup_index);
+ hb_map_t done_lookups;
+ OT::hb_closure_context_t c (face, glyphs, &done_lookups);
+ const OT::GSUB& gsub = *face->table.GSUB->table;
- l.closure (&c);
+ unsigned int iteration_count = 0;
+ unsigned int glyphs_length;
+ do
+ {
+ glyphs_length = glyphs->get_population ();
+ if (lookups)
+ {
+ for (hb_codepoint_t lookup_index = HB_SET_VALUE_INVALID; hb_set_next (lookups, &lookup_index);)
+ gsub.get_lookup (lookup_index).closure (&c, lookup_index);
+ }
+ else
+ {
+ for (unsigned int i = 0; i < gsub.get_lookup_count (); i++)
+ gsub.get_lookup (i).closure (&c, i);
+ }
+ } while (iteration_count++ <= HB_CLOSURE_MAX_STAGES &&
+ glyphs_length != glyphs->get_population ());
}
/*
* OT::GPOS
*/
+
+/**
+ * hb_ot_layout_has_positioning:
+ * @face: #hb_face_t to work upon
+ *
+ * Return value: true if the face has GPOS data, false otherwise
+ *
+ **/
hb_bool_t
hb_ot_layout_has_positioning (hb_face_t *face)
{
- return &_get_gpos (face) != &OT::Null(OT::GPOS);
+ return face->table.GPOS->table->has_data ();
}
+/**
+ * hb_ot_layout_position_start:
+ * @font: #hb_font_t to use
+ * @buffer: #hb_buffer_t buffer to work upon
+ *
+ * Called before positioning lookups are performed, to ensure that glyph
+ * attachment types and glyph-attachment chains are set for the glyphs in the buffer.
+ *
+ **/
void
hb_ot_layout_position_start (hb_font_t *font, hb_buffer_t *buffer)
{
OT::GPOS::position_start (font, buffer);
}
-hb_bool_t
-hb_ot_layout_position_lookup (hb_font_t *font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_mask_t mask)
-{
- if (unlikely (lookup_index >= hb_ot_layout_from_face (font->face)->gpos_lookup_count)) return false;
-
- OT::hb_apply_context_t c (font, buffer, mask);
-
- const OT::PosLookup& l = hb_ot_layout_from_face (font->face)->gpos->get_lookup (lookup_index);
- return l.apply_string (&c, &hb_ot_layout_from_face (font->face)->gpos_digests[lookup_index]);
+/**
+ * hb_ot_layout_position_finish_advances:
+ * @font: #hb_font_t to use
+ * @buffer: #hb_buffer_t buffer to work upon
+ *
+ * Called after positioning lookups are performed, to finish glyph advances.
+ *
+ **/
+void
+hb_ot_layout_position_finish_advances (hb_font_t *font, hb_buffer_t *buffer)
+{
+ OT::GPOS::position_finish_advances (font, buffer);
}
+/**
+ * hb_ot_layout_position_finish_offsets:
+ * @font: #hb_font_t to use
+ * @buffer: #hb_buffer_t buffer to work upon
+ *
+ * Called after positioning lookups are performed, to finish glyph offsets.
+ *
+ **/
void
-hb_ot_layout_position_finish (hb_font_t *font, hb_buffer_t *buffer, hb_bool_t zero_width_attached_marks)
+hb_ot_layout_position_finish_offsets (hb_font_t *font, hb_buffer_t *buffer)
{
- OT::GPOS::position_finish (font, buffer, zero_width_attached_marks);
+ OT::GPOS::position_finish_offsets (font, buffer);
}
+
+#ifndef HB_NO_LAYOUT_FEATURE_PARAMS
+/**
+ * hb_ot_layout_get_size_params:
+ * @face: #hb_face_t to work upon
+ * @design_size: (out): The design size of the face
+ * @subfamily_id: (out): The identifier of the face within the font subfamily
+ * @subfamily_name_id: (out): The ‘name’ table name ID of the face within the font subfamily
+ * @range_start: (out): The minimum size of the recommended size range for the face
+ * @range_end: (out): The maximum size of the recommended size range for the face
+ *
+ * Fetches optical-size feature data (i.e., the `size` feature from GPOS). Note that
+ * the subfamily_id and the subfamily name string (accessible via the subfamily_name_id)
+ * as used here are defined as pertaining only to fonts within a font family that differ
+ * specifically in their respective size ranges; other ways to differentiate fonts within
+ * a subfamily are not covered by the `size` feature.
+ *
+ * For more information on this distinction, see the [`size` feature documentation](
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt#tag-size).
+ *
+ * Return value: true if data found, false otherwise
+ *
+ * Since: 0.9.10
+ **/
hb_bool_t
-hb_ot_layout_get_size_params (hb_face_t *face,
- unsigned int *design_size, /* OUT. May be NULL */
- unsigned int *subfamily_id, /* OUT. May be NULL */
- unsigned int *subfamily_name_id, /* OUT. May be NULL */
- unsigned int *range_start, /* OUT. May be NULL */
- unsigned int *range_end /* OUT. May be NULL */)
-{
- const OT::GPOS &gpos = _get_gpos (face);
+hb_ot_layout_get_size_params (hb_face_t *face,
+ unsigned int *design_size, /* OUT. May be NULL */
+ unsigned int *subfamily_id, /* OUT. May be NULL */
+ hb_ot_name_id_t *subfamily_name_id, /* OUT. May be NULL */
+ unsigned int *range_start, /* OUT. May be NULL */
+ unsigned int *range_end /* OUT. May be NULL */)
+{
+ const OT::GPOS &gpos = *face->table.GPOS->table;
const hb_tag_t tag = HB_TAG ('s','i','z','e');
unsigned int num_features = gpos.get_feature_count ();
if (params.designSize)
{
-#define PARAM(a, A) if (a) *a = params.A
- PARAM (design_size, designSize);
- PARAM (subfamily_id, subfamilyID);
- PARAM (subfamily_name_id, subfamilyNameID);
- PARAM (range_start, rangeStart);
- PARAM (range_end, rangeEnd);
-#undef PARAM
+ if (design_size) *design_size = params.designSize;
+ if (subfamily_id) *subfamily_id = params.subfamilyID;
+ if (subfamily_name_id) *subfamily_name_id = params.subfamilyNameID;
+ if (range_start) *range_start = params.rangeStart;
+ if (range_end) *range_end = params.rangeEnd;
return true;
}
}
}
-#define PARAM(a, A) if (a) *a = 0
- PARAM (design_size, designSize);
- PARAM (subfamily_id, subfamilyID);
- PARAM (subfamily_name_id, subfamilyNameID);
- PARAM (range_start, rangeStart);
- PARAM (range_end, rangeEnd);
-#undef PARAM
+ if (design_size) *design_size = 0;
+ if (subfamily_id) *subfamily_id = 0;
+ if (subfamily_name_id) *subfamily_name_id = HB_OT_NAME_ID_INVALID;
+ if (range_start) *range_start = 0;
+ if (range_end) *range_end = 0;
+
+ return false;
+}
+/**
+ * hb_ot_layout_feature_get_name_ids:
+ * @face: #hb_face_t to work upon
+ * @table_tag: table tag to query, "GSUB" or "GPOS".
+ * @feature_index: index of feature to query.
+ * @label_id: (out) (allow-none): The ‘name’ table name ID that specifies a string
+ * for a user-interface label for this feature. (May be NULL.)
+ * @tooltip_id: (out) (allow-none): The ‘name’ table name ID that specifies a string
+ * that an application can use for tooltip text for this
+ * feature. (May be NULL.)
+ * @sample_id: (out) (allow-none): The ‘name’ table name ID that specifies sample text
+ * that illustrates the effect of this feature. (May be NULL.)
+ * @num_named_parameters: (out) (allow-none): Number of named parameters. (May be zero.)
+ * @first_param_id: (out) (allow-none): The first ‘name’ table name ID used to specify
+ * strings for user-interface labels for the feature
+ * parameters. (Must be zero if numParameters is zero.)
+ *
+ * Fetches name indices from feature parameters for "Stylistic Set" ('ssXX') or
+ * "Character Variant" ('cvXX') features.
+ *
+ * Return value: true if data found, false otherwise
+ *
+ * Since: 2.0.0
+ **/
+hb_bool_t
+hb_ot_layout_feature_get_name_ids (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int feature_index,
+ hb_ot_name_id_t *label_id, /* OUT. May be NULL */
+ hb_ot_name_id_t *tooltip_id, /* OUT. May be NULL */
+ hb_ot_name_id_t *sample_id, /* OUT. May be NULL */
+ unsigned int *num_named_parameters, /* OUT. May be NULL */
+ hb_ot_name_id_t *first_param_id /* OUT. May be NULL */)
+{
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+
+ hb_tag_t feature_tag = g.get_feature_tag (feature_index);
+ const OT::Feature &f = g.get_feature (feature_index);
+
+ const OT::FeatureParams &feature_params = f.get_feature_params ();
+ if (&feature_params != &Null (OT::FeatureParams))
+ {
+ const OT::FeatureParamsStylisticSet& ss_params =
+ feature_params.get_stylistic_set_params (feature_tag);
+ if (&ss_params != &Null (OT::FeatureParamsStylisticSet)) /* ssXX */
+ {
+ if (label_id) *label_id = ss_params.uiNameID;
+ // ssXX features don't have the rest
+ if (tooltip_id) *tooltip_id = HB_OT_NAME_ID_INVALID;
+ if (sample_id) *sample_id = HB_OT_NAME_ID_INVALID;
+ if (num_named_parameters) *num_named_parameters = 0;
+ if (first_param_id) *first_param_id = HB_OT_NAME_ID_INVALID;
+ return true;
+ }
+ const OT::FeatureParamsCharacterVariants& cv_params =
+ feature_params.get_character_variants_params (feature_tag);
+ if (&cv_params != &Null (OT::FeatureParamsCharacterVariants)) /* cvXX */
+ {
+ if (label_id) *label_id = cv_params.featUILableNameID;
+ if (tooltip_id) *tooltip_id = cv_params.featUITooltipTextNameID;
+ if (sample_id) *sample_id = cv_params.sampleTextNameID;
+ if (num_named_parameters) *num_named_parameters = cv_params.numNamedParameters;
+ if (first_param_id) *first_param_id = cv_params.firstParamUILabelNameID;
+ return true;
+ }
+ }
+ if (label_id) *label_id = HB_OT_NAME_ID_INVALID;
+ if (tooltip_id) *tooltip_id = HB_OT_NAME_ID_INVALID;
+ if (sample_id) *sample_id = HB_OT_NAME_ID_INVALID;
+ if (num_named_parameters) *num_named_parameters = 0;
+ if (first_param_id) *first_param_id = HB_OT_NAME_ID_INVALID;
return false;
}
+/**
+ * hb_ot_layout_feature_get_characters:
+ * @face: #hb_face_t to work upon
+ * @table_tag: table tag to query, "GSUB" or "GPOS".
+ * @feature_index: index of feature to query.
+ * @start_offset: offset of the first character to retrieve
+ * @char_count: (inout) (allow-none): Input = the maximum number of characters to return;
+ * Output = the actual number of characters returned (may be zero)
+ * @characters: (out caller-allocates) (array length=char_count): A buffer pointer.
+ * The Unicode codepoints of the characters for which this feature provides
+ * glyph variants.
+ *
+ * Fetches a list of the characters defined as having a variant under the specified
+ * "Character Variant" ("cvXX") feature tag.
+ *
+ * <note>Note: If the char_count output value is equal to its input value, then there
+ * is a chance there were more characters defined under the feature tag than were
+ * returned. This function can be called with incrementally larger start_offset
+ * until the char_count output value is lower than its input value, or the size
+ * of the characters array can be increased.</note>
+ *
+ * Return value: Number of total sample characters in the cvXX feature.
+ *
+ * Since: 2.0.0
+ **/
+unsigned int
+hb_ot_layout_feature_get_characters (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int feature_index,
+ unsigned int start_offset,
+ unsigned int *char_count, /* IN/OUT. May be NULL */
+ hb_codepoint_t *characters /* OUT. May be NULL */)
+{
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+
+ hb_tag_t feature_tag = g.get_feature_tag (feature_index);
+ const OT::Feature &f = g.get_feature (feature_index);
+
+ const OT::FeatureParams &feature_params = f.get_feature_params ();
+
+ const OT::FeatureParamsCharacterVariants& cv_params =
+ feature_params.get_character_variants_params(feature_tag);
+
+ unsigned int len = 0;
+ if (char_count && characters && start_offset < cv_params.characters.len)
+ {
+ len = hb_min (cv_params.characters.len - start_offset, *char_count);
+ for (unsigned int i = 0; i < len; ++i)
+ characters[i] = cv_params.characters[start_offset + i];
+ }
+ if (char_count) *char_count = len;
+ return cv_params.characters.len;
+}
+#endif
+
+
+/*
+ * Parts of different types are implemented here such that they have direct
+ * access to GSUB/GPOS lookups.
+ */
+
+
+struct GSUBProxy
+{
+ static constexpr unsigned table_index = 0u;
+ static constexpr bool inplace = false;
+ typedef OT::SubstLookup Lookup;
+
+ GSUBProxy (hb_face_t *face) :
+ table (*face->table.GSUB->table),
+ accels (face->table.GSUB->accels) {}
+
+ const OT::GSUB &table;
+ const OT::hb_ot_layout_lookup_accelerator_t *accels;
+};
+
+struct GPOSProxy
+{
+ static constexpr unsigned table_index = 1u;
+ static constexpr bool inplace = true;
+ typedef OT::PosLookup Lookup;
+
+ GPOSProxy (hb_face_t *face) :
+ table (*face->table.GPOS->table),
+ accels (face->table.GPOS->accels) {}
+
+ const OT::GPOS &table;
+ const OT::hb_ot_layout_lookup_accelerator_t *accels;
+};
+
+
+static inline bool
+apply_forward (OT::hb_ot_apply_context_t *c,
+ const OT::hb_ot_layout_lookup_accelerator_t &accel)
+{
+ bool ret = false;
+ hb_buffer_t *buffer = c->buffer;
+ while (buffer->idx < buffer->len && buffer->successful)
+ {
+ bool applied = false;
+ if (accel.may_have (buffer->cur().codepoint) &&
+ (buffer->cur().mask & c->lookup_mask) &&
+ c->check_glyph_property (&buffer->cur(), c->lookup_props))
+ {
+ applied = accel.apply (c);
+ }
+
+ if (applied)
+ ret = true;
+ else
+ buffer->next_glyph ();
+ }
+ return ret;
+}
+
+static inline bool
+apply_backward (OT::hb_ot_apply_context_t *c,
+ const OT::hb_ot_layout_lookup_accelerator_t &accel)
+{
+ bool ret = false;
+ hb_buffer_t *buffer = c->buffer;
+ do
+ {
+ if (accel.may_have (buffer->cur().codepoint) &&
+ (buffer->cur().mask & c->lookup_mask) &&
+ c->check_glyph_property (&buffer->cur(), c->lookup_props))
+ ret |= accel.apply (c);
+
+ /* The reverse lookup doesn't "advance" cursor (for good reason). */
+ buffer->idx--;
+
+ }
+ while ((int) buffer->idx >= 0);
+ return ret;
+}
+
+template <typename Proxy>
+static inline void
+apply_string (OT::hb_ot_apply_context_t *c,
+ const typename Proxy::Lookup &lookup,
+ const OT::hb_ot_layout_lookup_accelerator_t &accel)
+{
+ hb_buffer_t *buffer = c->buffer;
+
+ if (unlikely (!buffer->len || !c->lookup_mask))
+ return;
+
+ c->set_lookup_props (lookup.get_props ());
+
+ if (likely (!lookup.is_reverse ()))
+ {
+ /* in/out forward substitution/positioning */
+ if (Proxy::table_index == 0u)
+ buffer->clear_output ();
+ buffer->idx = 0;
+
+ bool ret;
+ ret = apply_forward (c, accel);
+ if (ret)
+ {
+ if (!Proxy::inplace)
+ buffer->swap_buffers ();
+ else
+ assert (!buffer->has_separate_output ());
+ }
+ }
+ else
+ {
+ /* in-place backward substitution/positioning */
+ if (Proxy::table_index == 0u)
+ buffer->remove_output ();
+ buffer->idx = buffer->len - 1;
+
+ apply_backward (c, accel);
+ }
+}
+
+template <typename Proxy>
+inline void hb_ot_map_t::apply (const Proxy &proxy,
+ const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer) const
+{
+ const unsigned int table_index = proxy.table_index;
+ unsigned int i = 0;
+ OT::hb_ot_apply_context_t c (table_index, font, buffer);
+ c.set_recurse_func (Proxy::Lookup::apply_recurse_func);
+
+ for (unsigned int stage_index = 0; stage_index < stages[table_index].length; stage_index++) {
+ const stage_map_t *stage = &stages[table_index][stage_index];
+ for (; i < stage->last_lookup; i++)
+ {
+ unsigned int lookup_index = lookups[table_index][i].index;
+ if (!buffer->message (font, "start lookup %d", lookup_index)) continue;
+ c.set_lookup_index (lookup_index);
+ c.set_lookup_mask (lookups[table_index][i].mask);
+ c.set_auto_zwj (lookups[table_index][i].auto_zwj);
+ c.set_auto_zwnj (lookups[table_index][i].auto_zwnj);
+ if (lookups[table_index][i].random)
+ {
+ c.set_random (true);
+ buffer->unsafe_to_break_all ();
+ }
+ apply_string<Proxy> (&c,
+ proxy.table.get_lookup (lookup_index),
+ proxy.accels[lookup_index]);
+ (void) buffer->message (font, "end lookup %d", lookup_index);
+ }
+
+ if (stage->pause_func)
+ {
+ buffer->clear_output ();
+ stage->pause_func (plan, font, buffer);
+ }
+ }
+}
+
+void hb_ot_map_t::substitute (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const
+{
+ GSUBProxy proxy (font->face);
+ apply (proxy, plan, font, buffer);
+}
+
+void hb_ot_map_t::position (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const
+{
+ GPOSProxy proxy (font->face);
+ apply (proxy, plan, font, buffer);
+}
+
+void
+hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c,
+ const OT::SubstLookup &lookup,
+ const OT::hb_ot_layout_lookup_accelerator_t &accel)
+{
+ apply_string<GSUBProxy> (c, lookup, accel);
+}
+
+#ifndef HB_NO_BASE
+/**
+ * hb_ot_layout_get_baseline:
+ * @font: a font
+ * @baseline_tag: a baseline tag
+ * @direction: text direction.
+ * @script_tag: script tag.
+ * @language_tag: language tag.
+ * @coord: (out): baseline value if found.
+ *
+ * Fetches a baseline value from the face.
+ *
+ * Return value: if found baseline value in the font.
+ *
+ * Since: 2.6.0
+ **/
+hb_bool_t
+hb_ot_layout_get_baseline (hb_font_t *font,
+ hb_ot_layout_baseline_tag_t baseline_tag,
+ hb_direction_t direction,
+ hb_tag_t script_tag,
+ hb_tag_t language_tag,
+ hb_position_t *coord /* OUT. May be NULL. */)
+{
+ bool result = font->face->table.BASE->get_baseline (font, baseline_tag, direction, script_tag, language_tag, coord);
+
+ if (result && coord)
+ *coord = HB_DIRECTION_IS_HORIZONTAL (direction) ? font->em_scale_y (*coord) : font->em_scale_x (*coord);
+
+ return result;
+}
+#endif
+#endif
projects / platform / upstream / harfbuzz.git / blobdiff