pos->y_offset = info->var2.u32;
}
+ // Fix up clusters so that we never return out-of-order indices;
+ // if core text has reordered glyphs, we'll merge them to the
+ // beginning of the reordered cluster.
+ // This does *not* mean we'll form the same clusters as Uniscribe
+ // or the native OT backend, only that the cluster indices will be
+ // non-decreasing in the output buffer.
+ if (HB_DIRECTION_IS_FORWARD (buffer->props.direction)) {
+ unsigned int prev_cluster = 0;
+ for (unsigned int i = 0; i < count; i++) {
+ unsigned int curr_cluster = buffer->info[i].cluster;
+ if (curr_cluster < prev_cluster) {
+ for (unsigned int j = i; j > 0; j--) {
+ if (buffer->info[j - 1].cluster > curr_cluster)
+ buffer->info[j - 1].cluster = curr_cluster;
+ else
+ break;
+ }
+ }
+ prev_cluster = curr_cluster;
+ }
+ } else {
+ // For RTL runs, we make them non-increasing instead.
+ unsigned int prev_cluster = (unsigned int)-1;
+ for (unsigned int i = 0; i < count; i++) {
+ unsigned int curr_cluster = buffer->info[i].cluster;
+ if (curr_cluster > prev_cluster) {
+ for (unsigned int j = i; j > 0; j--) {
+ if (buffer->info[j - 1].cluster < curr_cluster)
+ buffer->info[j - 1].cluster = curr_cluster;
+ else
+ break;
+ }
+ }
+ prev_cluster = curr_cluster;
+ }
+ }
+
return true;
}