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fix prev commit, window-offset for x-fade drawing

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This commit is contained in:
Robin Gareus 2014-05-26 18:22:21 +02:00
parent 791c668756
commit bdb342123f
1 changed files with 5 additions and 3 deletions
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8
libs/canvas/curve.cc
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@ -339,20 +339,22 @@ Curve::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
}
/* find left and right-most sample */
Duple window_space;
Points::size_type left = 0;
Points::size_type right = n_samples;
for (Points::size_type idx = 0; idx < n_samples - 1; ++idx) {
left = idx;
if (samples[idx].x >= draw.x0) break;
window_space = item_to_window (Duple (samples[idx].x, 0.0));
if (window_space.x >= draw.x0) break;
}
for (Points::size_type idx = n_samples; idx > left + 1; --idx) {
if (samples[idx].x <= draw.x1) break;
window_space = item_to_window (Duple (samples[idx].x, 0.0));
if (window_space.x <= draw.x1) break;
right = idx;
}
/* draw line between samples */
Duple window_space;
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) {