76 lines
1.2 KiB
Rust
76 lines
1.2 KiB
Rust
//! Image and color representations.
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use std::ops::{Index, IndexMut};
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/// RGBA8 color.
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#[derive(Clone, Debug, PartialEq)]
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pub struct Color
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{
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pub r: u8,
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pub g: u8,
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pub b: u8,
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pub a: u8,
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}
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/// Image with width and height.
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pub struct Image
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{
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w: usize,
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h: usize,
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pub cr: Vec<Color>,
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}
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impl Color
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{
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/// Converts a R5G5B5 format color to RGBA8.
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pub fn from_r5g5b5(rgb: u16) -> Color
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{
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let r = rgb >> 10 & 0x1f;
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let g = rgb >> 5 & 0x1f;
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let b = rgb & 0x1f;
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Color{r: (r << 3 | r >> 2) as u8,
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g: (g << 3 | g >> 2) as u8,
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b: (b << 3 | b >> 2) as u8,
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a: 255}
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}
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}
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impl Image
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{
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/// Creates a new Image structure.
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pub fn new(w: usize, h: usize) -> Image
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{
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Image{w, h, cr: Vec::with_capacity(w * h)}
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}
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pub fn w(&self) -> usize
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{
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self.w
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}
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pub fn h(&self) -> usize
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{
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self.h
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}
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}
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impl Index<(usize, usize)> for Image
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{
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type Output = Color;
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fn index(&self, (x, y): (usize, usize)) -> &Color
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{
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&self.cr[x + y * self.w]
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}
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}
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impl IndexMut<(usize, usize)> for Image
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{
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fn index_mut(&mut self, (x, y): (usize, usize)) -> &mut Color
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{
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&mut self.cr[x + y * self.w]
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}
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}
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// EOF
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