teascade/slideshow
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Remove alpha

Browse Source
This commit is contained in:
Sofia 2025-09-12 14:25:28 +03:00
parent b31d6255bf
commit 91d04ff3cc
1 changed files with 16 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
src/qoi.rs
View File

@ -15,7 +15,6 @@ use crate::{
// https://qoiformat.org/qoi-specification.pdf
const image: &[u8; 1253] = include_bytes!("../images/hi.qoi");
const BUFFER_SIZE: usize = 64;
#[derive(Debug, uDebug)]
pub enum QoiErr {
@ -100,9 +99,7 @@ struct QoiIterator<'a> {
inner: Iter<'a, u8>,
serial: &'a mut Usart<USART0, Pin<mode::Input, PD0>, Pin<mode::Output, PD1>, CoreClock>,
prev_pixels: [Rgb565; 64],
prev_alphas: [u8; 64],
last_pixel: Rgb565,
last_alpha: u8,
repeat: u8,
expected_colors: u16,
parsed_colors: u16,
@ -118,9 +115,7 @@ impl<'a> QoiIterator<'a> {
inner: bytes,
serial,
prev_pixels: [Rgb565(0, 255, 0); 64],
prev_alphas: [255; 64],
last_pixel: Rgb565(0, 0, 0),
last_alpha: 255,
repeat: 0,
expected_colors: expected,
parsed_colors: 0,
@ -143,19 +138,19 @@ impl<'a> Iterator for QoiIterator<'a> {
return Some(self.last_pixel);
}
if let Some(byte) = self.inner.next() {
let (color, alpha) = if *byte == 0xff {
let color = if *byte == 0xff {
let red = self.inner.next().unwrap();
let green = self.inner.next().unwrap();
let blue = self.inner.next().unwrap();
let alpha = self.inner.next().unwrap();
let _alpha = self.inner.next().unwrap();
// ufmt::uwriteln!(self.serial, "RGBA: {} {} {} {}", red, green, blue, alpha).unwrap();
(Rgb565(*red, *green, *blue), *alpha)
Rgb565(*red, *green, *blue)
} else if *byte == 0b11111110 {
let red = self.inner.next().unwrap();
let green = self.inner.next().unwrap();
let blue = self.inner.next().unwrap();
// ufmt::uwriteln!(self.serial, "RGB: {} {} {}", red, green, blue).unwrap();
(Rgb565(*red, *green, *blue), self.last_alpha)
Rgb565(*red, *green, *blue)
} else {
let tag = (0b11000000 & byte) >> 6;
let data = 0b00111111 & byte;
@ -163,10 +158,7 @@ impl<'a> Iterator for QoiIterator<'a> {
// ufmt::uwriteln!(self.serial, "Tag: {}", tag).unwrap();
if tag == 0 {
(
self.prev_pixels[data as usize],
self.prev_alphas[data as usize],
)
self.prev_pixels[data as usize]
} else if tag == 1 {
let dr = ((0b110000 & data) >> 4) as i8 - 2;
let dg = ((0b001100 & data) >> 2) as i8 - 2;
@ -179,13 +171,10 @@ impl<'a> Iterator for QoiIterator<'a> {
// (0b000011 & data)
// )
// .unwrap();
(
Rgb565(
(self.last_pixel.0 as i8).wrapping_add(dr) as u8,
(self.last_pixel.1 as i8).wrapping_add(dg) as u8,
(self.last_pixel.2 as i8).wrapping_add(db) as u8,
),
self.last_alpha,
)
} else if tag == 2 {
let second = self.inner.next().unwrap();
@ -209,27 +198,23 @@ impl<'a> Iterator for QoiIterator<'a> {
// self.last_pixel.2 as i8 + db
// )
// .unwrap();
(
Rgb565(
(self.last_pixel.0 as i8 + dr) as u8,
(self.last_pixel.1 as i8 + dg) as u8,
(self.last_pixel.2 as i8 + db) as u8,
),
self.last_alpha,
)
} else if tag == 3 {
// QOI_OP_RUN
self.repeat = data;
// ufmt::uwriteln!(self.serial, "Repeat: {}", self.repeat).unwrap();
(self.last_pixel, self.last_alpha)
self.last_pixel
} else {
(Rgb565::green(), 255)
Rgb565::green()
}
};
self.last_pixel = color;
self.last_alpha = alpha;
let hash =
((color.0 as u32 * 3 + color.1 as u32 * 5 + color.2 as u32 * 7 + alpha as u32 * 11)
((color.0 as u32 * 3 + color.1 as u32 * 5 + color.2 as u32 * 7 + 255 as u32 * 11)
% 64) as usize;
// ufmt::uwriteln!(