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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/qoi/src/header.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/qoi/src/header.rs')
-rw-r--r--vendor/qoi/src/header.rs120
1 files changed, 0 insertions, 120 deletions
diff --git a/vendor/qoi/src/header.rs b/vendor/qoi/src/header.rs
deleted file mode 100644
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--- a/vendor/qoi/src/header.rs
+++ /dev/null
@@ -1,120 +0,0 @@
-use core::convert::TryInto;
-
-use bytemuck::cast_slice;
-
-use crate::consts::{QOI_HEADER_SIZE, QOI_MAGIC, QOI_PIXELS_MAX};
-use crate::encode_max_len;
-use crate::error::{Error, Result};
-use crate::types::{Channels, ColorSpace};
-use crate::utils::unlikely;
-
-/// Image header: dimensions, channels, color space.
-///
-/// ### Notes
-/// A valid image header must satisfy the following conditions:
-/// * Both width and height must be non-zero.
-/// * Maximum number of pixels is 400Mp (=4e8 pixels).
-#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
-pub struct Header {
- /// Image width in pixels
- pub width: u32,
- /// Image height in pixels
- pub height: u32,
- /// Number of 8-bit channels per pixel
- pub channels: Channels,
- /// Color space (informative field, doesn't affect encoding)
- pub colorspace: ColorSpace,
-}
-
-impl Default for Header {
- #[inline]
- fn default() -> Self {
- Self {
- width: 1,
- height: 1,
- channels: Channels::default(),
- colorspace: ColorSpace::default(),
- }
- }
-}
-
-impl Header {
- /// Creates a new header and validates image dimensions.
- #[inline]
- pub const fn try_new(
- width: u32, height: u32, channels: Channels, colorspace: ColorSpace,
- ) -> Result<Self> {
- let n_pixels = (width as usize).saturating_mul(height as usize);
- if unlikely(n_pixels == 0 || n_pixels > QOI_PIXELS_MAX) {
- return Err(Error::InvalidImageDimensions { width, height });
- }
- Ok(Self { width, height, channels, colorspace })
- }
-
- /// Creates a new header with modified channels.
- #[inline]
- pub const fn with_channels(mut self, channels: Channels) -> Self {
- self.channels = channels;
- self
- }
-
- /// Creates a new header with modified color space.
- #[inline]
- pub const fn with_colorspace(mut self, colorspace: ColorSpace) -> Self {
- self.colorspace = colorspace;
- self
- }
-
- /// Serializes the header into a bytes array.
- #[inline]
- pub(crate) fn encode(&self) -> [u8; QOI_HEADER_SIZE] {
- let mut out = [0; QOI_HEADER_SIZE];
- out[..4].copy_from_slice(&QOI_MAGIC.to_be_bytes());
- out[4..8].copy_from_slice(&self.width.to_be_bytes());
- out[8..12].copy_from_slice(&self.height.to_be_bytes());
- out[12] = self.channels.into();
- out[13] = self.colorspace.into();
- out
- }
-
- /// Deserializes the header from a byte array.
- #[inline]
- pub(crate) fn decode(data: impl AsRef<[u8]>) -> Result<Self> {
- let data = data.as_ref();
- if unlikely(data.len() < QOI_HEADER_SIZE) {
- return Err(Error::UnexpectedBufferEnd);
- }
- let v = cast_slice::<_, [u8; 4]>(&data[..12]);
- let magic = u32::from_be_bytes(v[0]);
- let width = u32::from_be_bytes(v[1]);
- let height = u32::from_be_bytes(v[2]);
- let channels = data[12].try_into()?;
- let colorspace = data[13].try_into()?;
- if unlikely(magic != QOI_MAGIC) {
- return Err(Error::InvalidMagic { magic });
- }
- Self::try_new(width, height, channels, colorspace)
- }
-
- /// Returns a number of pixels in the image.
- #[inline]
- pub const fn n_pixels(&self) -> usize {
- (self.width as usize).saturating_mul(self.height as usize)
- }
-
- /// Returns the total number of bytes in the raw pixel array.
- ///
- /// This may come useful when pre-allocating a buffer to decode the image into.
- #[inline]
- pub const fn n_bytes(&self) -> usize {
- self.n_pixels() * self.channels.as_u8() as usize
- }
-
- /// The maximum number of bytes the encoded image will take.
- ///
- /// Can be used to pre-allocate the buffer to encode the image into.
- #[inline]
- pub fn encode_max_len(&self) -> usize {
- encode_max_len(self.width, self.height, self.channels)
- }
-}