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https://github.com/typst/typst
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Laurenz Stampfl
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1085dd00de
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c7a647d083
@ -163,14 +163,15 @@ fn convert_gradient(
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stops.push(stop);
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};
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// Convert stops.
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match &gradient {
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Gradient::Linear(linear) => {
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if let Some((c, t)) = linear.stops.first() {
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add_single(c, *t);
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Gradient::Linear(_) | Gradient::Radial(_) => {
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if let Some(s) = gradient.stops().first() {
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add_single(&s.color, s.offset.unwrap());
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}
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// Create the individual gradient functions for each pair of stops.
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for window in linear.stops.windows(2) {
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for window in gradient.stops().windows(2) {
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let (first, second) = (window[0], window[1]);
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// If we have a hue index or are using Oklab, we will create several
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@ -179,106 +180,20 @@ fn convert_gradient(
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if gradient.space().hue_index().is_some() {
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for i in 0..=32 {
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let t = i as f64 / 32.0;
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let real_t =
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Ratio::new(first.1.get() * (1.0 - t) + second.1.get() * t);
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let real_t = Ratio::new(
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first.offset.unwrap().get() * (1.0 - t)
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+ second.offset.unwrap().get() * t,
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);
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let c = gradient.sample(RatioOrAngle::Ratio(real_t));
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add_single(&c, real_t);
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}
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}
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add_single(&second.0, second.1);
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add_single(&second.color, second.offset.unwrap());
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}
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let (mut sin, mut cos) = (angle.sin(), angle.cos());
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// Scale to edges of unit square.
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let factor = cos.abs() + sin.abs();
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sin *= factor;
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cos *= factor;
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let (x1, y1, x2, y2): (f32, f32, f32, f32) = match angle.quadrant() {
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Quadrant::First => (0.0, 0.0, cos as f32, sin as f32),
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Quadrant::Second => (1.0, 0.0, cos as f32 + 1.0, sin as f32),
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Quadrant::Third => (1.0, 1.0, cos as f32 + 1.0, sin as f32 + 1.0),
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Quadrant::Fourth => (0.0, 1.0, cos as f32, sin as f32 + 1.0),
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};
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let linear = krilla::paint::LinearGradient {
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x1,
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y1,
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x2,
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y2,
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transform: base_transform.to_krilla().pre_concat(
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krilla::geom::Transform::from_scale(size.x.to_f32(), size.y.to_f32()),
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),
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spread_method: SpreadMethod::Pad,
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stops: stops.into(),
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anti_alias: gradient.anti_alias(),
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};
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(linear.into(), 255)
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}
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Gradient::Radial(radial) => {
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if let Some((c, t)) = radial.stops.first() {
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add_single(c, *t);
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}
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// Create the individual gradient functions for each pair of stops.
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for window in radial.stops.windows(2) {
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let (first, second) = (window[0], window[1]);
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// If we have a hue index or are using Oklab, we will create several
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// stops in-between to make the gradient smoother without interpolation
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// issues with native color spaces.
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if gradient.space().hue_index().is_some() {
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for i in 0..=32 {
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let t = i as f64 / 32.0;
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let real_t =
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Ratio::new(first.1.get() * (1.0 - t) + second.1.get() * t);
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let c = gradient.sample(RatioOrAngle::Ratio(real_t));
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add_single(&c, real_t);
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}
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}
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add_single(&second.0, second.1);
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}
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let radial = krilla::paint::RadialGradient {
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fx: radial.focal_center.x.get() as f32,
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fy: radial.focal_center.y.get() as f32,
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fr: radial.focal_radius.get() as f32,
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cx: radial.center.x.get() as f32,
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cy: radial.center.y.get() as f32,
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cr: radial.radius.get() as f32,
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transform: base_transform.to_krilla().pre_concat(
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krilla::geom::Transform::from_scale(size.x.to_f32(), size.y.to_f32()),
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),
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spread_method: SpreadMethod::Pad,
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stops: stops.into(),
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anti_alias: gradient.anti_alias(),
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};
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(radial.into(), 255)
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}
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Gradient::Conic(conic) => {
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// Correct the gradient's angle
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let cx = size.x.to_f32() * conic.center.x.get() as f32;
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let cy = size.y.to_f32() * conic.center.y.get() as f32;
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let actual_transform = base_transform
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.pre_concat(Transform::rotate_at(
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angle,
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Abs::pt(cx as f64),
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Abs::pt(cy as f64),
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))
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.pre_concat(Transform::scale_at(
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-Ratio::one(),
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Ratio::one(),
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Abs::pt(cx as f64),
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Abs::pt(cy as f64),
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));
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if let Some((c, t)) = conic.stops.first() {
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add_single(c, *t);
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}
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@ -328,6 +243,83 @@ fn convert_gradient(
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add_single(&c1, t1);
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}
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}
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}
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match &gradient {
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Gradient::Linear(_) => {
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let (x1, y1, x2, y2) = {
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let (mut sin, mut cos) = (angle.sin(), angle.cos());
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// Scale to edges of unit square.
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let factor = cos.abs() + sin.abs();
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sin *= factor;
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cos *= factor;
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match angle.quadrant() {
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Quadrant::First => (0.0, 0.0, cos as f32, sin as f32),
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Quadrant::Second => (1.0, 0.0, cos as f32 + 1.0, sin as f32),
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Quadrant::Third => (1.0, 1.0, cos as f32 + 1.0, sin as f32 + 1.0),
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Quadrant::Fourth => (0.0, 1.0, cos as f32, sin as f32 + 1.0),
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}
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};
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let linear = krilla::paint::LinearGradient {
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x1,
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y1,
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x2,
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y2,
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// x and y coordinates are normalized, so need to scale by the size.
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transform: base_transform
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.pre_concat(Transform::scale(
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Ratio::new(size.x.to_f32() as f64),
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Ratio::new(size.y.to_f32() as f64),
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))
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.to_krilla(),
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spread_method: SpreadMethod::Pad,
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stops: stops.into(),
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anti_alias: gradient.anti_alias(),
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};
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(linear.into(), 255)
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}
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Gradient::Radial(radial) => {
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let radial = krilla::paint::RadialGradient {
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fx: radial.focal_center.x.get() as f32,
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fy: radial.focal_center.y.get() as f32,
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fr: radial.focal_radius.get() as f32,
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cx: radial.center.x.get() as f32,
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cy: radial.center.y.get() as f32,
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cr: radial.radius.get() as f32,
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transform: base_transform.to_krilla().pre_concat(
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krilla::geom::Transform::from_scale(size.x.to_f32(), size.y.to_f32()),
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),
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spread_method: SpreadMethod::Pad,
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stops: stops.into(),
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anti_alias: gradient.anti_alias(),
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};
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(radial.into(), 255)
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}
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Gradient::Conic(conic) => {
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// Correct the gradient's angle
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let cx = size.x.to_f32() * conic.center.x.get() as f32;
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let cy = size.y.to_f32() * conic.center.y.get() as f32;
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let actual_transform = base_transform
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// Adjust for the angle
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.pre_concat(Transform::rotate_at(
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angle,
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Abs::pt(cx as f64),
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Abs::pt(cy as f64),
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))
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// Default start point in krilla and typst are at the opposite side, so we need
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// to flip it horizontally.
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.pre_concat(Transform::scale_at(
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-Ratio::one(),
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Ratio::one(),
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Abs::pt(cx as f64),
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Abs::pt(cy as f64),
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));
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let sweep = krilla::paint::SweepGradient {
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cx,
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