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use crate::*;
type EPoint<T> = euclid::Point2D<T, f64>;
pub type Transform = euclid::Transform2D<f64, f64, f64>;
impl<T: Type, C: Color, U: Type, D: Color> Filter<T, C, U, D> for Transform {
fn schedule(&self) -> Schedule {
Schedule::Image
}
fn output_size(&self, input: &Input<T, C>, _dest: &mut Image<U, D>) -> Size {
let rect = self.outer_transformed_rect(&euclid::Rect::new(
euclid::Point2D::new(0., 0.),
input.images()[0].size().to_f64(),
));
rect.size.to_usize()
}
fn compute_at(&self, pt: Point, input: &Input<T, C>, px: &mut DataMut<U, D>) {
let pt = EPoint::new(pt.x as f64, pt.y as f64);
let dest = self.transform_point(pt);
let px1 = input.get_pixel((dest.x.floor() as usize, dest.y.floor() as usize), None);
let px2 = input.get_pixel((dest.x.ceil() as usize, dest.y.ceil() as usize), None);
((px1 + &px2) / 2.).copy_to_slice(px);
}
}
#[cfg(test)]
mod test {
use crate::{filter::*, Filter, Image, Rgb};
#[test]
fn test_rotate90() {
let a = Image::<f32, Rgb>::open("images/A.exr").unwrap();
let mut dest = Image::<f32, Rgb>::new((a.height(), a.width()));
rotate90(a.size(), dest.size()).eval(&[&a], &mut dest);
assert!(dest.save("images/test-rotate90.jpg").is_ok())
}
#[test]
fn test_rotate180() {
let a = Image::<f32, Rgb>::open("images/A.exr").unwrap();
let mut dest = a.new_like();
rotate180(a.size()).eval(&[&a], &mut dest);
assert!(dest.save("images/test-rotate180.jpg").is_ok())
}
#[test]
fn test_rotate270() {
let a = Image::<f32, Rgb>::open("images/A.exr").unwrap();
let mut dest = Image::<f32, Rgb>::new((a.height(), a.width()));
rotate270(a.size(), dest.size()).eval(&[&a], &mut dest);
assert!(dest.save("images/test-rotate270.jpg").is_ok())
}
#[test]
fn test_scale() {
let a = Image::<u8, Rgb>::open("images/A.exr").unwrap();
let mut dest: Image<f32, Rgb> = Image::new(a.size() * 2);
scale(2., 2.).eval(&[&a], &mut dest);
assert!(dest.save("images/test-scale.jpg").is_ok())
}
#[test]
fn test_scale_resize() {
let a = Image::<u8, Rgb>::open("images/A.exr").unwrap();
let mut dest0: Image<u16, Rgb> = Image::new(a.size() * 2);
let mut dest1: Image<u16, Rgb> = Image::new(a.size() * 2);
scale(2., 2.).eval(&[&a], &mut dest0);
resize(a.size(), a.size() * 2).eval(&[&a], &mut dest1);
assert!(dest0 == dest1);
}
}