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https://github.com/servo/servo.git
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94 lines
2.6 KiB
Rust
94 lines
2.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use cssparser::RGBA;
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use style::values::animated::{Animate, Procedure, ToAnimatedValue};
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use style::values::generics::transform::{Transform, TransformOperation};
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fn interpolate_rgba(from: RGBA, to: RGBA, progress: f64) -> RGBA {
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let from = from.to_animated_value();
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let to = to.to_animated_value();
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RGBA::from_animated_value(
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from.animate(&to, Procedure::Interpolate { progress })
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.unwrap(),
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)
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}
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// Color
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#[test]
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fn test_rgba_color_interepolation_preserves_transparent() {
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assert_eq!(
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interpolate_rgba(RGBA::transparent(), RGBA::transparent(), 0.5),
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RGBA::transparent()
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);
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}
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#[test]
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fn test_rgba_color_interepolation_alpha() {
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assert_eq!(
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interpolate_rgba(RGBA::new(200, 0, 0, 100), RGBA::new(0, 200, 0, 200), 0.5),
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RGBA::new(67, 133, 0, 150)
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);
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}
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#[test]
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fn test_rgba_color_interepolation_out_of_range_1() {
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// Some cubic-bezier functions produce values that are out of range [0, 1].
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// Unclamped cases.
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assert_eq!(
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interpolate_rgba(
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RGBA::from_floats(0.3, 0.0, 0.0, 0.4),
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RGBA::from_floats(0.0, 1.0, 0.0, 0.6),
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-0.5
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),
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RGBA::new(154, 0, 0, 77)
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);
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}
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#[test]
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fn test_rgba_color_interepolation_out_of_range_2() {
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assert_eq!(
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interpolate_rgba(
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RGBA::from_floats(1.0, 0.0, 0.0, 0.6),
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RGBA::from_floats(0.0, 0.3, 0.0, 0.4),
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1.5
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),
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RGBA::new(0, 154, 0, 77)
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);
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}
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#[test]
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fn test_rgba_color_interepolation_out_of_range_clamped_1() {
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assert_eq!(
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interpolate_rgba(
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RGBA::from_floats(1.0, 0.0, 0.0, 0.8),
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RGBA::from_floats(0.0, 1.0, 0.0, 0.2),
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-0.5
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),
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RGBA::from_floats(1.0, 0.0, 0.0, 1.0)
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);
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}
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#[test]
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fn test_rgba_color_interepolation_out_of_range_clamped_2() {
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assert_eq!(
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interpolate_rgba(
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RGBA::from_floats(1.0, 0.0, 0.0, 0.8),
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RGBA::from_floats(0.0, 1.0, 0.0, 0.2),
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1.5
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),
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RGBA::from_floats(0.0, 0.0, 0.0, 0.0)
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);
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}
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#[test]
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fn test_transform_interpolation_on_scale() {
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let from = Transform(vec![TransformOperation::Scale3D(1.0, 2.0, 1.0)]);
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let to = Transform(vec![TransformOperation::Scale3D(2.0, 4.0, 2.0)]);
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assert_eq!(
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from.animate(&to, Procedure::Interpolate { progress: 0.5 })
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.unwrap(),
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Transform(vec![TransformOperation::Scale3D(1.5, 3.0, 1.5)])
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);
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}
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