ardour/livetrax
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do not draw waveform outline at x-positions where the waveform "spread" would not leave at least 1 pixel between the two outline pixels.

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Plus a better comment.
This commit is contained in:
Paul Davis 2015-06-23 17:12:52 -04:00
parent e9224a58d1
commit 2b81d4d0fe
1 changed files with 13 additions and 4 deletions
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17
libs/canvas/wave_view.cc
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@ -625,7 +625,11 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak
clipped = true;
}
if (!clipped) {
if (!clipped && tips[i].spread > 2.0) {
/* only draw the outline if the spread
implies 3 or more pixels (so that we see 1
white pixel in the middle).
*/
outline_context->move_to (i, tips[i].bot);
/* normal lower terminal dot; line moves up */
outline_context->rel_line_to (0, -1.0);
@ -645,10 +649,15 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak
}
if (!clipped) {
/* special case where only 1 pixel of
* the waveform line is drawn (and
* nothing else).
*
* we draw a 1px "line", pretending
* that the span is 1.0 (whether it is
* zero or 1.0)
*/
wave_context->move_to (i, tips[i].top);
/* special case where outline only is drawn.
* we draw a 1px "line", pretending that the span is 1.0
*/
wave_context->rel_line_to (0, 1.0);
}
}