Update `pathfinder_content`
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385272851a
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@ -333,6 +333,11 @@ impl Contour {
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self.points[self.points.len() - index as usize]
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}
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#[inline]
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pub fn flags_of(&self, index: u32) -> PointFlags {
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self.flags[index as usize]
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}
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#[inline]
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pub fn push_endpoint(&mut self, point: Vector2F) {
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self.push_point(point, PointFlags::empty(), true);
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@ -12,13 +12,11 @@
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use pathfinder_geometry::line_segment::LineSegment2F;
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use pathfinder_geometry::transform2d::Transform2F;
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use pathfinder_geometry::util::{self, EPSILON};
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use pathfinder_geometry::util::EPSILON;
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use pathfinder_geometry::vector::{Vector2F, vec2f};
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use pathfinder_simd::default::F32x4;
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use std::f32::consts::SQRT_2;
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const MAX_NEWTON_ITERATIONS: u32 = 32;
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub struct Segment {
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pub baseline: LineSegment2F,
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@ -155,16 +153,6 @@ impl Segment {
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new_segment
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}
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#[inline]
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pub fn is_monotonic(&self) -> bool {
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// FIXME(pcwalton): Don't degree elevate!
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match self.kind {
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SegmentKind::None | SegmentKind::Line => true,
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SegmentKind::Quadratic => self.to_cubic().as_cubic_segment().is_monotonic(),
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SegmentKind::Cubic => self.as_cubic_segment().is_monotonic(),
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}
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}
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#[inline]
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pub fn reversed(&self) -> Segment {
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Segment {
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@ -341,72 +329,6 @@ impl<'s> CubicSegment<'s> {
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self.split(t).0.baseline.to()
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}
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#[inline]
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pub fn is_monotonic(self) -> bool {
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// TODO(pcwalton): Optimize this.
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let (p0, p3) = (self.0.baseline.from_y(), self.0.baseline.to_y());
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let (p1, p2) = (self.0.ctrl.from_y(), self.0.ctrl.to_y());
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(p0 <= p1 && p1 <= p2 && p2 <= p3) || (p0 >= p1 && p1 >= p2 && p2 >= p3)
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}
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#[inline]
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pub fn y_extrema(self) -> (Option<f32>, Option<f32>) {
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if self.is_monotonic() {
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return (None, None);
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}
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let p0p1p2p3 = F32x4::new(
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self.0.baseline.from_y(),
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self.0.ctrl.from_y(),
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self.0.ctrl.to_y(),
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self.0.baseline.to_y(),
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);
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let pxp0p1p2 = p0p1p2p3.wxyz();
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let pxv0v1v2 = p0p1p2p3 - pxp0p1p2;
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let (v0, v1, v2) = (pxv0v1v2[1], pxv0v1v2[2], pxv0v1v2[3]);
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let (t0, t1);
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let (v0_to_v1, v2_to_v1) = (v0 - v1, v2 - v1);
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let denom = v0_to_v1 + v2_to_v1;
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if util::approx_eq(denom, 0.0) {
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// Let's not divide by zero (issue #146). Fall back to Newton's method.
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// FIXME(pcwalton): Can we have two roots here?
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let mut t = 0.5;
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for _ in 0..MAX_NEWTON_ITERATIONS {
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let dydt = 3.0 * ((denom * t - v0_to_v1 - v0_to_v1) * t + v0);
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if f32::abs(dydt) <= EPSILON {
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break
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}
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let d2ydt2 = 6.0 * (denom * t - v0_to_v1);
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t -= dydt / d2ydt2;
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}
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t0 = t;
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t1 = 0.0;
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debug!("... t=(newton) {}", t);
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} else {
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// Algebraically compute the values for t.
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let discrim = f32::sqrt(v1 * v1 - v0 * v2);
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let denom_recip = 1.0 / denom;
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t0 = (v0_to_v1 + discrim) * denom_recip;
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t1 = (v0_to_v1 - discrim) * denom_recip;
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debug!("... t=({} +/- {})/{} t0={} t1={}", v0_to_v1, discrim, denom, t0, t1);
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}
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return match (
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t0 > EPSILON && t0 < 1.0 - EPSILON,
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t1 > EPSILON && t1 < 1.0 - EPSILON,
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) {
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(false, false) => (None, None),
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(true, false) => (Some(t0), None),
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(false, true) => (Some(t1), None),
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(true, true) => (Some(f32::min(t0, t1)), Some(f32::max(t0, t1))),
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};
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}
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#[inline]
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pub fn min_x(&self) -> f32 {
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f32::min(self.0.baseline.min_x(), self.0.ctrl.min_x())
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