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pub struct GenericCache<T: Copy> {
pub height: usize,
pub stride: usize,
pub xpos: usize,
pub data: Vec<T>,
pub default: T,
}
impl<T:Copy> GenericCache<T> {
pub fn new(height: usize, stride: usize, default: T) -> Self {
let mut ret = Self {
stride,
height,
xpos: 0,
data: Vec::with_capacity((height + 1) * stride),
default,
};
ret.reset();
ret
}
pub fn full_size(&self) -> usize { self.stride * (self.height + 1) }
pub fn reset(&mut self) {
self.data.truncate(0);
let size = self.full_size();
self.data.resize(size, self.default);
self.xpos = self.stride + 1;
}
pub fn update_row(&mut self) {
for i in 0..self.stride {
self.data[i] = self.data[self.height * self.stride + i];
}
self.data.truncate(self.stride);
let size = self.full_size();
self.data.resize(size, self.default);
self.xpos = self.stride + 1;
}
}
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