ardour/livetrax
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Tempo ramps - finally fix flicker in framed curve.

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This commit is contained in:
nick_m 2016-05-25 12:31:17 +10:00
parent 6e97f40d08
commit 2d31fa7bb1
1 changed files with 7 additions and 4 deletions
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11
libs/canvas/framed_curve.cc
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@ -187,22 +187,25 @@ FramedCurve::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) c
Points::size_type left = 0;
Points::size_type right = n_samples;
for (Points::size_type idx = 0; idx < n_samples - 1; ++idx) {
for (Points::size_type idx = 0; idx < n_samples; ++idx) {
window_space = item_to_window (Duple (samples[idx].x, 0.0));
if (window_space.x >= draw.x0) break;
left = idx;
}
for (Points::size_type idx = n_samples; idx > left; --idx) {
for (Points::size_type idx = n_samples; idx > left + 2; --idx) {
window_space = item_to_window (Duple (samples[idx].x, 0.0));
if (window_space.x <= draw.x1) break;
right = idx;
}
window_space = item_to_window (*_points.begin());
context->move_to (window_space.x, window_space.y);
/* draw line between samples */
window_space = item_to_window (Duple (samples[left].x, samples[left].y));
context->move_to (window_space.x, window_space.y);
for (uint32_t idx = left + 1; idx < right; ++idx) {
context->line_to (window_space.x, window_space.y);
for (uint32_t idx = left; idx < right; ++idx) {
window_space = item_to_window (Duple (samples[idx].x, samples[idx].y), false);
context->line_to (window_space.x, window_space.y);
}