1 files changed, 31 insertions, 0 deletions
diff --git a/evc/src/view.rs b/evc/src/view.rs
index 3843128..5868680 100644
--- a/evc/src/view.rs
+++ b/evc/src/view.rs
@@ -1,9 +1,11 @@
 use crate::{
     frame::Frame,
     helpers::{pixel::Pixel, vector::Vec2},
+    refsampler::Sampler,
 };
 use std::ops::{Index, IndexMut};
 
+#[derive(Debug, Clone)]
 pub struct View<T> {
     pub frame: T,
     pub offset: Vec2<isize>,
@@ -140,6 +142,22 @@ impl<T: Index<Vec2<isize>, Output = Pixel>> View<&T> {
         }
         acc as f64
     }
+    pub fn diff_sampler(va: &Self, vb: &Sampler<'_>) -> f64 {
+        assert_eq!(va.size, vb.view.size);
+        let mut acc = 0;
+        for x in 0..va.size.x {
+            for y in 0..va.size.y {
+                let a = va[(x, y)];
+                let b = vb.sample(Vec2 {
+                    x: x as f32,
+                    y: y as f32,
+                });
+                acc += Pixel::distance(a, b);
+            }
+        }
+        acc as f64
+    }
+
     pub fn pixels(&self) -> Vec<Pixel> {
         let mut v = vec![];
         for x in 0..self.size.x {
@@ -158,6 +176,14 @@ impl View<&mut Frame> {
             }
         }
     }
+    pub fn copy_from_sampler(&mut self, other: &Sampler) {
+        for x in 0..self.size.x {
+            for y in 0..self.size.y {
+                self[(x, y)] = other.sample((x, y).into());
+            }
+        }
+    }
+
     pub fn set_pixels(&mut self, pixels: &Vec<Pixel>) {
         for x in 0..self.size.x {
             for y in 0..self.size.y {
@@ -166,6 +192,11 @@ impl View<&mut Frame> {
         }
     }
 }
+impl View<&Frame> {
+    pub fn sample(&self, p: Vec2<f32>) -> Pixel {
+        self.frame.sample(p + self.offset.into())
+    }
+}
 
 impl<T: Index<Vec2<isize>, Output = Pixel>> Index<Vec2<isize>> for View<&T> {
     type Output = Pixel;