*/
-#include "canvas/line.h"
+#include "pbd/compose.h"
+
#include "canvas/canvas.h"
#include "canvas/debug.h"
+
#include "tempo_lines.h"
-#include "ardour_ui.h"
+#include "public_editor.h"
+#include "rgb_macros.h"
+#include "ui_config.h"
using namespace std;
-TempoLines::TempoLines (ArdourCanvas::Canvas& canvas, ArdourCanvas::Group* group, double h)
- : _canvas (canvas)
- , _group (group)
- , _height (h)
+TempoLines::TempoLines (ArdourCanvas::Container* group, double)
+ : lines (group, ArdourCanvas::LineSet::Vertical)
{
+ lines.set_extent (ArdourCanvas::COORD_MAX);
}
void
TempoLines::tempo_map_changed()
{
- /* remove all lines from the group, put them in the cache (to avoid
- * unnecessary object destruction+construction later), and clear _lines
- */
-
- _group->clear ();
- _cache.insert (_cache.end(), _lines.begin(), _lines.end());
- _lines.clear ();
+ lines.clear ();
}
void
TempoLines::show ()
{
- _group->show ();
+ lines.show ();
}
void
TempoLines::hide ()
{
- _group->hide ();
+ lines.hide ();
}
void
-TempoLines::draw (const ARDOUR::TempoMap::BBTPointList::const_iterator& begin,
- const ARDOUR::TempoMap::BBTPointList::const_iterator& end,
- double samples_per_pixel)
+TempoLines::draw_ticks (std::vector<ARDOUR::TempoMap::BBTPoint>& grid,
+ unsigned divisions,
+ framecnt_t leftmost_frame,
+ framecnt_t frame_rate)
{
- ARDOUR::TempoMap::BBTPointList::const_iterator i;
- ArdourCanvas::Rect const visible = _canvas.visible_area ();
+ 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.beats_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_beat (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);
+ }
+ }
+}
+
+void
+TempoLines::draw (std::vector<ARDOUR::TempoMap::BBTPoint>& grid,
+ unsigned divisions,
+ framecnt_t leftmost_frame,
+ framecnt_t frame_rate)
+{
+ std::vector<ARDOUR::TempoMap::BBTPoint>::const_iterator i;
double beat_density;
uint32_t beats = 0;
/* get the first bar spacing */
- i = end;
+ i = grid.end();
i--;
- bars = (*i).bar - (*begin).bar;
- beats = distance (begin, end) - bars;
+ bars = (*i).bar - (*grid.begin()).bar;
+ beats = distance (grid.begin(), grid.end()) - bars;
- beat_density = (beats * 10.0f) / visible.width ();
+ beat_density = (beats * 10.0f) / lines.canvas()->width();
- if (beat_density > 4.0f) {
+ if (beat_density > 2.0f) {
/* if the lines are too close together, they become useless */
- tempo_map_changed();
+ lines.clear ();
return;
}
- tempo_map_changed ();
+ /* constrain divisions to a log2 factor to cap line density */
+ while (divisions > 3 && beat_density * divisions > 0.4) {
+ divisions /= 2;
+ }
+
+ lines.clear ();
+ if (beat_density <= 0.12 && grid.begin() != grid.end() && grid.begin()->frame > 0) {
+ /* draw subdivisions of the beat before the first visible beat line XX this shouldn't happen now */
+ std::vector<ARDOUR::TempoMap::BBTPoint> vec;
+ vec.push_back (*i);
+ draw_ticks (vec, divisions, leftmost_frame, frame_rate);
+ }
- for (i = begin; i != end; ++i) {
+ for (i = grid.begin(); i != grid.end(); ++i) {
if ((*i).is_bar()) {
- color = ARDOUR_UI::config()->get_canvasvar_MeasureLineBar();
+ color = UIConfiguration::instance().color ("measure line bar");
} else {
- if (beat_density > 2.0) {
+ if (beat_density > 0.3) {
continue; /* only draw beat lines if the gaps between beats are large. */
}
- color = ARDOUR_UI::config()->get_canvasvar_MeasureLineBeat();
+ color = UIConfiguration::instance().color_mod ("measure line beat", "measure line beat");
}
- ArdourCanvas::Coord xpos = rint(((framepos_t)(*i).frame) / (double)samples_per_pixel);
+ ArdourCanvas::Coord xpos = PublicEditor::instance().sample_to_pixel_unrounded ((*i).frame);
- ArdourCanvas::Line* line;
+ lines.add (xpos, 1.0, color);
- if (!_cache.empty()) {
- line = _cache.back ();
- _cache.pop_back ();
- line->reparent (_group);
- } else {
- line = new ArdourCanvas::Line (_group);
- CANVAS_DEBUG_NAME (line, "tempo measure line");
- line->set_ignore_events (true);
+ if (beat_density <= 0.12) {
+ /* draw subdivisions of this beat */
+ std::vector<ARDOUR::TempoMap::BBTPoint> vec;
+ vec.push_back (*i);
+ draw_ticks (vec, divisions, leftmost_frame, frame_rate);
}
-
- /* move to 0.5 offset to ensure single pixel lines (see Cairo
- * FAQ for info on why we do this).
- */
-
- line->set_x0 (xpos + 0.5);
- line->set_x1 (xpos + 0.5);
- line->set_y0 (0.0);
- line->set_y1 (_height);
- line->set_outline_color (color);
- line->show ();
}
}
projects / ardour.git / blobdiff