nihav-core/src/data/mod.rs

   1 pub struct GenericCache<T: Copy> {
   2     pub height: usize,
   3     pub stride: usize,
   4     pub xpos:   usize,
   5     pub data:   Vec<T>,
   6     pub default: T,
   7 }
   8
   9 impl<T:Copy> GenericCache<T> {
  10     pub fn new(height: usize, stride: usize, default: T) -> Self {
  11         let mut ret = Self {
  12                 stride,
  13                 height,
  14                 xpos:   0,
  15                 data:   Vec::with_capacity((height + 1) * stride),
  16                 default,
  17             };
  18         ret.reset();
  19         ret
  20     }
  21     pub fn full_size(&self) -> usize { self.stride * (self.height + 1) }
  22     pub fn reset(&mut self) {
  23         self.data.truncate(0);
  24         let size = self.full_size();
  25         self.data.resize(size, self.default);
  26         self.xpos = self.stride + 1;
  27     }
  28     pub fn update_row(&mut self) {
  29         for i in 0..self.stride {
  30             self.data[i] = self.data[self.height * self.stride + i];
  31         }
  32         self.data.truncate(self.stride);
  33         let size = self.full_size();
  34         self.data.resize(size, self.default);
  35         self.xpos = self.stride + 1;
  36     }
  37 }
  38