summaryrefslogtreecommitdiffstats
path: root/gfx/harfbuzz/src/hb-ot-shaper-hebrew.cc
diff options
context:
space:
mode:
Diffstat (limited to 'gfx/harfbuzz/src/hb-ot-shaper-hebrew.cc')
-rw-r--r--gfx/harfbuzz/src/hb-ot-shaper-hebrew.cc211
1 files changed, 211 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-shaper-hebrew.cc b/gfx/harfbuzz/src/hb-ot-shaper-hebrew.cc
new file mode 100644
index 0000000000..e18edd6b3f
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-ot-shaper-hebrew.cc
@@ -0,0 +1,211 @@
+/*
+ * Copyright © 2010,2012 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
+ */
+
+#include "hb.hh"
+
+#ifndef HB_NO_OT_SHAPE
+
+#include "hb-ot-shaper.hh"
+
+
+static bool
+compose_hebrew (const hb_ot_shape_normalize_context_t *c,
+ hb_codepoint_t a,
+ hb_codepoint_t b,
+ hb_codepoint_t *ab)
+{
+ /* Hebrew presentation-form shaping.
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=728866
+ * Hebrew presentation forms with dagesh, for characters U+05D0..05EA;
+ * Note that some letters do not have a dagesh presForm encoded.
+ */
+ static const hb_codepoint_t sDageshForms[0x05EAu - 0x05D0u + 1] = {
+ 0xFB30u, /* ALEF */
+ 0xFB31u, /* BET */
+ 0xFB32u, /* GIMEL */
+ 0xFB33u, /* DALET */
+ 0xFB34u, /* HE */
+ 0xFB35u, /* VAV */
+ 0xFB36u, /* ZAYIN */
+ 0x0000u, /* HET */
+ 0xFB38u, /* TET */
+ 0xFB39u, /* YOD */
+ 0xFB3Au, /* FINAL KAF */
+ 0xFB3Bu, /* KAF */
+ 0xFB3Cu, /* LAMED */
+ 0x0000u, /* FINAL MEM */
+ 0xFB3Eu, /* MEM */
+ 0x0000u, /* FINAL NUN */
+ 0xFB40u, /* NUN */
+ 0xFB41u, /* SAMEKH */
+ 0x0000u, /* AYIN */
+ 0xFB43u, /* FINAL PE */
+ 0xFB44u, /* PE */
+ 0x0000u, /* FINAL TSADI */
+ 0xFB46u, /* TSADI */
+ 0xFB47u, /* QOF */
+ 0xFB48u, /* RESH */
+ 0xFB49u, /* SHIN */
+ 0xFB4Au /* TAV */
+ };
+
+ bool found = (bool) c->unicode->compose (a, b, ab);
+
+#ifdef HB_NO_OT_SHAPER_HEBREW_FALLBACK
+ return found;
+#endif
+
+ if (!found && !c->plan->has_gpos_mark)
+ {
+ /* Special-case Hebrew presentation forms that are excluded from
+ * standard normalization, but wanted for old fonts. */
+ switch (b) {
+ case 0x05B4u: /* HIRIQ */
+ if (a == 0x05D9u) { /* YOD */
+ *ab = 0xFB1Du;
+ found = true;
+ }
+ break;
+ case 0x05B7u: /* PATAH */
+ if (a == 0x05F2u) { /* YIDDISH YOD YOD */
+ *ab = 0xFB1Fu;
+ found = true;
+ } else if (a == 0x05D0u) { /* ALEF */
+ *ab = 0xFB2Eu;
+ found = true;
+ }
+ break;
+ case 0x05B8u: /* QAMATS */
+ if (a == 0x05D0u) { /* ALEF */
+ *ab = 0xFB2Fu;
+ found = true;
+ }
+ break;
+ case 0x05B9u: /* HOLAM */
+ if (a == 0x05D5u) { /* VAV */
+ *ab = 0xFB4Bu;
+ found = true;
+ }
+ break;
+ case 0x05BCu: /* DAGESH */
+ if (a >= 0x05D0u && a <= 0x05EAu) {
+ *ab = sDageshForms[a - 0x05D0u];
+ found = (*ab != 0);
+ } else if (a == 0xFB2Au) { /* SHIN WITH SHIN DOT */
+ *ab = 0xFB2Cu;
+ found = true;
+ } else if (a == 0xFB2Bu) { /* SHIN WITH SIN DOT */
+ *ab = 0xFB2Du;
+ found = true;
+ }
+ break;
+ case 0x05BFu: /* RAFE */
+ switch (a) {
+ case 0x05D1u: /* BET */
+ *ab = 0xFB4Cu;
+ found = true;
+ break;
+ case 0x05DBu: /* KAF */
+ *ab = 0xFB4Du;
+ found = true;
+ break;
+ case 0x05E4u: /* PE */
+ *ab = 0xFB4Eu;
+ found = true;
+ break;
+ }
+ break;
+ case 0x05C1u: /* SHIN DOT */
+ if (a == 0x05E9u) { /* SHIN */
+ *ab = 0xFB2Au;
+ found = true;
+ } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
+ *ab = 0xFB2Cu;
+ found = true;
+ }
+ break;
+ case 0x05C2u: /* SIN DOT */
+ if (a == 0x05E9u) { /* SHIN */
+ *ab = 0xFB2Bu;
+ found = true;
+ } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
+ *ab = 0xFB2Du;
+ found = true;
+ }
+ break;
+ }
+ }
+
+ return found;
+}
+
+static void
+reorder_marks_hebrew (const hb_ot_shape_plan_t *plan HB_UNUSED,
+ hb_buffer_t *buffer,
+ unsigned int start,
+ unsigned int end)
+{
+ hb_glyph_info_t *info = buffer->info;
+
+ for (unsigned i = start + 2; i < end; i++)
+ {
+ unsigned c0 = info_cc (info[i - 2]);
+ unsigned c1 = info_cc (info[i - 1]);
+ unsigned c2 = info_cc (info[i - 0]);
+
+ if ((c0 == HB_MODIFIED_COMBINING_CLASS_CCC17 || c0 == HB_MODIFIED_COMBINING_CLASS_CCC18) /* patach or qamats */ &&
+ (c1 == HB_MODIFIED_COMBINING_CLASS_CCC10 || c1 == HB_MODIFIED_COMBINING_CLASS_CCC14) /* sheva or hiriq */ &&
+ (c2 == HB_MODIFIED_COMBINING_CLASS_CCC22 || c2 == HB_UNICODE_COMBINING_CLASS_BELOW) /* meteg or below */)
+ {
+ buffer->merge_clusters (i - 1, i + 1);
+ hb_swap (info[i - 1], info[i]);
+ break;
+ }
+ }
+
+
+}
+
+const hb_ot_shaper_t _hb_ot_shaper_hebrew =
+{
+ nullptr, /* collect_features */
+ nullptr, /* override_features */
+ nullptr, /* data_create */
+ nullptr, /* data_destroy */
+ nullptr, /* preprocess_text */
+ nullptr, /* postprocess_glyphs */
+ nullptr, /* decompose */
+ compose_hebrew,
+ nullptr, /* setup_masks */
+ reorder_marks_hebrew,
+ HB_TAG ('h','e','b','r'), /* gpos_tag. https://github.com/harfbuzz/harfbuzz/issues/347#issuecomment-267838368 */
+ HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
+ HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
+ true, /* fallback_position */
+};
+
+
+#endif