71 lines
2.0 KiB
Rust
71 lines
2.0 KiB
Rust
// pathfinder/renderer/src/tile_map.rs
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//
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// Copyright © 2019 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use pathfinder_geometry::rect::RectI;
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use pathfinder_geometry::vector::{Vector2I, vec2i};
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#[derive(Debug)]
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pub struct DenseTileMap<T> {
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pub data: Vec<T>,
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pub rect: RectI,
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}
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impl<T> DenseTileMap<T> {
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#[inline]
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pub fn new(rect: RectI) -> DenseTileMap<T>
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where
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T: Copy + Clone + Default,
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{
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let length = rect.size().x() as usize * rect.size().y() as usize;
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DenseTileMap {
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data: vec![T::default(); length],
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rect,
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}
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}
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#[inline]
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pub fn from_builder<F>(build: F, rect: RectI) -> DenseTileMap<T>
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where
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F: FnMut(usize) -> T,
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{
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let length = rect.size().x() as usize * rect.size().y() as usize;
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DenseTileMap {
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data: (0..length).map(build).collect(),
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rect,
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}
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}
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#[inline]
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pub fn get(&self, coords: Vector2I) -> Option<&T> {
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self.coords_to_index(coords).and_then(|index| self.data.get(index))
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}
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#[inline]
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pub fn coords_to_index(&self, coords: Vector2I) -> Option<usize> {
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if self.rect.contains_point(coords) {
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Some(self.coords_to_index_unchecked(coords))
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} else {
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None
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}
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}
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#[inline]
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pub fn coords_to_index_unchecked(&self, coords: Vector2I) -> usize {
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(coords.y() - self.rect.min_y()) as usize * self.rect.size().x() as usize
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+ (coords.x() - self.rect.min_x()) as usize
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}
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#[inline]
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pub fn index_to_coords(&self, index: usize) -> Vector2I {
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let (width, index) = (self.rect.size().x(), index as i32);
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self.rect.origin() + vec2i(index % width, index / width)
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}
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}
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