+ lines.hide ();
+}
+
+void
+TempoLines::draw_ticks (std::vector<ARDOUR::TempoMap::BBTPoint>& grid,
+ unsigned divisions,
+ framecnt_t leftmost_frame,
+ framecnt_t frame_rate)
+{
+ const uint32_t base = UIConfiguration::instance().color_mod("measure line beat", "measure line beat");
+
+ for (unsigned l = 1; l < divisions; ++l) {
+ /* find the coarsest division level this tick falls on */
+ unsigned level = divisions;
+ for (unsigned d = divisions; d >= 4; d /= 2) {
+ if (l % (divisions / d) == 0) {
+ level = d;
+ }
+ }
+ /* draw line with alpha corresponding to coarsest level */
+ const uint8_t a = max(8, (int)rint(UINT_RGBA_A(base) / (0.8 * log2(level))));
+ const uint32_t c = UINT_RGBA_CHANGE_A(base, a);
+ framepos_t f = 0;
+
+ if (grid.begin()->c != 0.0) {
+ const double beat_divisions = (l / ((double) divisions)) * (grid.begin()->tempo.note_type() / grid.begin()->meter.note_divisor());
+ const double time_at_division = log (((grid.begin()->c * (beat_divisions)) /
+ grid.begin()->tempo.note_types_per_minute()) + 1) / grid.begin()->c;
+
+ f = grid.begin()->frame + (framecnt_t) floor ((time_at_division * 60.0 * frame_rate) + 0.5);
+ } else {
+ const double fpb = grid.begin()->tempo.frames_per_note_type (frame_rate)
+ * (grid.begin()->tempo.note_type() / grid.begin()->meter.note_divisor());
+
+ f = grid.begin()->frame + (l * (fpb / (double) divisions));
+ }
+ if (f > leftmost_frame) {
+ lines.add (PublicEditor::instance().sample_to_pixel_unrounded (f), 1.0, c);
+ }
+ }