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smooth visual curve drawing

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This commit is contained in:
Robin Gareus 2014-05-30 03:04:02 +02:00
parent 38891288f3
commit fed5599baa
6 changed files with 31 additions and 46 deletions
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11
libs/canvas/curve.cc
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@ -188,18 +188,9 @@ Curve::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
/* 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);
Coord last_x = round(window_space.x);
Coord last_y = round(window_space.y);
for (uint32_t idx = left + 1; idx < right; ++idx) {
window_space = item_to_window (Duple (samples[idx].x, samples[idx].y));
if (last_x == round(window_space.x)) continue;
if (last_y == round(window_space.y)) continue;
last_x = round(window_space.x);
last_y = round(window_space.y);
context->line_to (last_x - .5 , last_y + .5);
}
if (last_x != round(window_space.x) || last_y != round(window_space.y)) {
context->line_to (window_space.x - .5 , window_space.y + .5);
context->line_to (window_space.x, window_space.y);
}
switch (curve_fill) {