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update waveform drawing for zoomed-in, non-overlapping min/max peaks

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Robin Gareus 2014-09-12 16:42:55 +02:00 • committed by Paul Davis
parent c718bd7cc7
commit 72c630f445
1 changed files with 13 additions and 2 deletions
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15
libs/canvas/wave_view.cc
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@ -466,9 +466,9 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak
bot = 0.0;
}
tips[i].spread = fabs (((1.0 - top) * (_height/2.0)) - ((1.0 - bot) * _height/2.0));
tips[i].top = y_extent (top, false);
tips[i].bot = y_extent (bot, true);
tips[i].spread = fabs (tips[i].top - tips[i].bot);
}
} else {
@ -484,7 +484,7 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak
tips[i].top = y_extent (_peaks[i].min, false);
tips[i].bot = y_extent (_peaks[i].max, true);
tips[i].spread = fabs (((1.0 - _peaks[i].max) * (_height/2.0)) - ((1.0 - _peaks[i].min) * (_height/2.0)));
tips[i].spread = fabs (tips[i].top - tips[i].bot);
}
}
@ -578,6 +578,17 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak
wave_context->line_to (i, tips[i].bot);
}
if (i > 0) {
if (tips[i-1].top < tips[i].bot) {
wave_context->move_to (i-1, tips[i-1].top);
wave_context->line_to (i, tips[i].bot);
}
else if (tips[i-1].bot > tips[i].top) {
wave_context->move_to (i-1, tips[i-1].bot);
wave_context->line_to (i, tips[i].top);
}
}
/* zero line */
if (tips[i].spread >= 5.0 && show_zero_line()) {