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Curve: anti-aliasing.

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use cairo for anti-aliasing, and ignore explicit Catmull-Rom
points for that fall on the same x-cordinate.
This commit is contained in:
Robin Gareus 2014-05-27 19:28:56 +02:00
parent d9b7c8b864
commit c03b658531
1 changed files with 4 additions and 1 deletions
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5
libs/canvas/curve.cc
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@ -383,9 +383,12 @@ Curve::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
/* draw line between samples */ /* draw line between samples */
window_space = item_to_window (Duple (samples[left].x, samples[left].y)); window_space = item_to_window (Duple (samples[left].x, samples[left].y));
context->move_to (window_space.x, window_space.y); context->move_to (window_space.x, window_space.y);
Coord last_x = round(window_space.x);
for (uint32_t idx = left + 1; idx < right; ++idx) { for (uint32_t idx = left + 1; idx < right; ++idx) {
window_space = item_to_window (Duple (samples[idx].x, samples[idx].y)); window_space = item_to_window (Duple (samples[idx].x, samples[idx].y));
context->line_to (window_space.x, window_space.y); if (last_x == round(window_space.x)) continue;
last_x = round(window_space.x);
context->line_to (last_x - .5 , window_space.y);
} }
switch (curve_fill) { switch (curve_fill) {