+#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(HB_WITH_WIN1256)
+#define HB_WITH_WIN1256
+#endif
+
+#ifdef HB_WITH_WIN1256
+#include "hb-ot-shape-complex-arabic-win1256.hh"
+#endif
+
+struct ManifestLookup {
+ OT::Tag tag;
+ OT::OffsetTo<OT::SubstLookup> lookupOffset;
+};
+typedef OT::ArrayOf<ManifestLookup> Manifest;
+
+static bool
+arabic_fallback_plan_init_win1256 (arabic_fallback_plan_t *fallback_plan,
+ const hb_ot_shape_plan_t *plan,
+ hb_font_t *font)
+{
+#ifdef HB_WITH_WIN1256
+ /* Does this font look like it's Windows-1256-encoded? */
+ hb_codepoint_t g;
+ if (!(hb_font_get_glyph (font, 0x0627u, 0, &g) && g == 199 /* ALEF */ &&
+ hb_font_get_glyph (font, 0x0644u, 0, &g) && g == 225 /* LAM */ &&
+ hb_font_get_glyph (font, 0x0649u, 0, &g) && g == 236 /* ALEF MAKSURA */ &&
+ hb_font_get_glyph (font, 0x064Au, 0, &g) && g == 237 /* YEH */ &&
+ hb_font_get_glyph (font, 0x0652u, 0, &g) && g == 250 /* SUKUN */))
+ return false;
+
+ const Manifest &manifest = reinterpret_cast<const Manifest&> (arabic_win1256_gsub_lookups.manifest);
+ ASSERT_STATIC (sizeof (arabic_win1256_gsub_lookups.manifestData) / sizeof (ManifestLookup)
+ <= ARABIC_FALLBACK_MAX_LOOKUPS);
+ /* TODO sanitize the table? */
+
+ unsigned j = 0;
+ unsigned int count = manifest.len;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ fallback_plan->mask_array[j] = plan->map.get_1_mask (manifest[i].tag);
+ if (fallback_plan->mask_array[j])
+ {
+ fallback_plan->lookup_array[j] = const_cast<OT::SubstLookup*> (&(&manifest+manifest[i].lookupOffset));
+ if (fallback_plan->lookup_array[j])
+ {
+ fallback_plan->accel_array[j].init (*fallback_plan->lookup_array[j]);
+ j++;
+ }
+ }
+ }
+
+ fallback_plan->num_lookups = j;
+ fallback_plan->free_lookups = false;
+
+ return j > 0;
+#else
+ return false;
+#endif
+}
+
+static bool
+arabic_fallback_plan_init_unicode (arabic_fallback_plan_t *fallback_plan,
+ const hb_ot_shape_plan_t *plan,
+ hb_font_t *font)
+{
+ ASSERT_STATIC (ARRAY_LENGTH_CONST(arabic_fallback_features) <= ARABIC_FALLBACK_MAX_LOOKUPS);
+ unsigned int j = 0;
+ for (unsigned int i = 0; i < ARRAY_LENGTH(arabic_fallback_features) ; i++)
+ {
+ fallback_plan->mask_array[j] = plan->map.get_1_mask (arabic_fallback_features[i]);
+ if (fallback_plan->mask_array[j])
+ {
+ fallback_plan->lookup_array[j] = arabic_fallback_synthesize_lookup (plan, font, i);
+ if (fallback_plan->lookup_array[j])
+ {
+ fallback_plan->accel_array[j].init (*fallback_plan->lookup_array[j]);
+ j++;
+ }
+ }
+ }
+
+ fallback_plan->num_lookups = j;
+ fallback_plan->free_lookups = true;
+
+ return j > 0;
+}
+