651 * Happens in Sinhala. */
652 for (unsigned int i = base + 1; i < end; i++)
653 if (info[i].indic_category() == OT_M) {
654 for (unsigned int j = i + 1; j < end; j++)
655 if (is_consonant (info[j])) {
656 info[j].indic_position() = POS_FINAL_C;
657 break;
658 }
659 break;
660 }
661
662 /* Handle beginning Ra */
663 if (has_reph)
664 info[start].indic_position() = POS_RA_TO_BECOME_REPH;
665
666 /* For old-style Indic script tags, move the first post-base Halant after
667 * last consonant.
668 *
669 * Reports suggest that in some scripts Uniscribe does this only if there
670 * is *not* a Halant after last consonant already (eg. Kannada), while it
671 * does it unconditionally in other scripts (eg. Malayalam). We don't
672 * currently know about other scripts, so we single out Malayalam for now.
673 *
674 * Kannada test case:
675 * U+0C9A,U+0CCD,U+0C9A,U+0CCD
676 * With some versions of Lohit Kannada.
677 * https://bugs.freedesktop.org/show_bug.cgi?id=59118
678 *
679 * Malayalam test case:
680 * U+0D38,U+0D4D,U+0D31,U+0D4D,U+0D31,U+0D4D
681 * With lohit-ttf-20121122/Lohit-Malayalam.ttf
682 */
683 if (indic_plan->is_old_spec)
684 {
685 bool disallow_double_halants = buffer->props.script != HB_SCRIPT_MALAYALAM;
686 for (unsigned int i = base + 1; i < end; i++)
687 if (info[i].indic_category() == OT_H)
688 {
689 unsigned int j;
690 for (j = end - 1; j > i; j--)
691 if (is_consonant (info[j]) ||
692 (disallow_double_halants && info[j].indic_category() == OT_H))
693 break;
694 if (info[j].indic_category() != OT_H && j > i) {
695 /* Move Halant to after last consonant. */
696 hb_glyph_info_t t = info[i];
697 memmove (&info[i], &info[i + 1], (j - i) * sizeof (info[0]));
698 info[j] = t;
699 }
700 break;
701 }
702 }
703
704 /* Attach misc marks to previous char to move with them. */
705 {
|
651 * Happens in Sinhala. */
652 for (unsigned int i = base + 1; i < end; i++)
653 if (info[i].indic_category() == OT_M) {
654 for (unsigned int j = i + 1; j < end; j++)
655 if (is_consonant (info[j])) {
656 info[j].indic_position() = POS_FINAL_C;
657 break;
658 }
659 break;
660 }
661
662 /* Handle beginning Ra */
663 if (has_reph)
664 info[start].indic_position() = POS_RA_TO_BECOME_REPH;
665
666 /* For old-style Indic script tags, move the first post-base Halant after
667 * last consonant.
668 *
669 * Reports suggest that in some scripts Uniscribe does this only if there
670 * is *not* a Halant after last consonant already (eg. Kannada), while it
671 * does it unconditionally in other scripts (eg. Malayalam, Bengali). We
672 * don't currently know about other scripts, so we whitelist Malayalam and
673 * Bengali for now.
674 *
675 * Kannada test case:
676 * U+0C9A,U+0CCD,U+0C9A,U+0CCD
677 * With some versions of Lohit Kannada.
678 * https://bugs.freedesktop.org/show_bug.cgi?id=59118
679 *
680 * Malayalam test case:
681 * U+0D38,U+0D4D,U+0D31,U+0D4D,U+0D31,U+0D4D
682 * With lohit-ttf-20121122/Lohit-Malayalam.ttf
683 *
684 * Bengali test case
685 * U+0998,U+09CD,U+09AF,U+09CD
686 * With Windows XP vrinda.ttf
687 * https://github.com/harfbuzz/harfbuzz/issues/1073
688 */
689 if (indic_plan->is_old_spec)
690 {
691 bool disallow_double_halants = buffer->props.script != HB_SCRIPT_MALAYALAM &&
692 buffer->props.script != HB_SCRIPT_BENGALI;
693 for (unsigned int i = base + 1; i < end; i++)
694 if (info[i].indic_category() == OT_H)
695 {
696 unsigned int j;
697 for (j = end - 1; j > i; j--)
698 if (is_consonant (info[j]) ||
699 (disallow_double_halants && info[j].indic_category() == OT_H))
700 break;
701 if (info[j].indic_category() != OT_H && j > i) {
702 /* Move Halant to after last consonant. */
703 hb_glyph_info_t t = info[i];
704 memmove (&info[i], &info[i + 1], (j - i) * sizeof (info[0]));
705 info[j] = t;
706 }
707 break;
708 }
709 }
710
711 /* Attach misc marks to previous char to move with them. */
712 {
|