X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=gtk2_ardour%2Ftempo_lines.cc;h=7a780c424e72d36b4b29f15396ffd1b36d3ec839;hb=8d8666d041f0d0336a48389176ec0631c45cc6ff;hp=083b7a5cca8b4db2049dc4b784d6acf490cea4b0;hpb=ea1ccb869a152d7344f498d2a062867f5bcf9d0b;p=ardour.git diff --git a/gtk2_ardour/tempo_lines.cc b/gtk2_ardour/tempo_lines.cc index 083b7a5cca..7a780c424e 100644 --- a/gtk2_ardour/tempo_lines.cc +++ b/gtk2_ardour/tempo_lines.cc @@ -17,110 +17,174 @@ */ -#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_ticks (std::vector& 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); + } + } } void -TempoLines::draw (const ARDOUR::TempoMap::BBTPointList::const_iterator& begin, - const ARDOUR::TempoMap::BBTPointList::const_iterator& end, - double samples_per_pixel) +TempoLines::draw (std::vector& grid, + unsigned divisions, + framecnt_t leftmost_frame, + framecnt_t frame_rate) { - ARDOUR::TempoMap::BBTPointList::const_iterator i; - ArdourCanvas::Rect const visible = _canvas.visible_area (); + std::vector::const_iterator i; double beat_density; uint32_t beats = 0; uint32_t bars = 0; + const uint32_t bar_color = UIConfiguration::instance().color ("measure line bar"); + const uint32_t beat_color = UIConfiguration::instance().color_mod ("measure line beat", "measure line beat"); uint32_t color; + bool all_bars = false; /* 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; + + int32_t bar_mod = 4; - beat_density = (beats * 10.0f) / visible.width (); + if (bars < distance (grid.begin(), grid.end()) - 1) { + /* grid contains beats and bars */ + beats = distance (grid.begin(), grid.end()) - bars; + } else { + /* grid contains only bars */ + beats = distance (grid.begin(), grid.end()); - if (beat_density > 4.0f) { + if (i != grid.begin()) { + const int32_t last_bar = (*i).bar; + i--; + bar_mod = (last_bar - (*i).bar) * 4; + } + + all_bars = true; + } + + double canvas_width_used = 1.0; + if (leftmost_frame < grid.front().frame) { + const framecnt_t frame_distance = max ((framecnt_t) 1, grid.back().frame - grid.front().frame); + canvas_width_used = 1.0 - ((grid.front().frame - leftmost_frame) / (double) (frame_distance + grid.front().frame)); + } + + beat_density = (beats * 10.0f) / (lines.canvas()->width() * canvas_width_used); + + 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; + } - for (i = begin; i != end; ++i) { + lines.clear (); + if (beat_density <= 0.12 && grid.begin() != grid.end() && grid.begin()->frame > 0 && !all_bars) { + /* draw subdivisions of the beat before the first visible beat line XX this shouldn't happen now */ + std::vector vec; + vec.push_back (*i); + draw_ticks (vec, divisions, leftmost_frame, frame_rate); + } + + for (i = grid.begin(); i != grid.end(); ++i) { if ((*i).is_bar()) { - color = ARDOUR_UI::config()->get_canvasvar_MeasureLineBar(); + /* keep all_bar beat density down */ + if (all_bars && beat_density > 0.3 && ((*i).bar % bar_mod) != 1) { + continue; + } + + color = bar_color; } 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 = beat_color; } - 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 && !all_bars) { + /* draw subdivisions of this beat */ + std::vector 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 (); } }