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use std::io::{self, Read, Seek, SeekFrom};
use bitflags::bitflags;
use byteorder::{LittleEndian, ReadBytesExt};
use num_enum::CustomTryInto;
use crate::helpers::read_bytes;
#[derive(Eq, PartialEq, CustomTryInto)]
#[repr(u16)]
pub enum ProfileType {
None = 0,
SRgb = 1,
EmbeddedIccProfile = 2,
}
bitflags! {
pub struct Flags: u16 {
const SpecialFixedGamma = 1;
}
}
pub struct ColorProfileChunk {
pub profile_type: ProfileType,
pub flags: Flags,
pub fixed_gamma: f32,
pub icc_profile: Vec<u8>,
}
impl ColorProfileChunk {
pub fn from_read<R>(read: &mut R) -> io::Result<Self>
where
R: Read + Seek,
{
let profile_type = read
.read_u16::<LittleEndian>()?
.try_into_ProfileType()
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
let flags = Flags::from_bits_truncate(read.read_u16::<LittleEndian>()?);
let fixed_gamma = read.read_f32::<LittleEndian>()?;
read.seek(SeekFrom::Current(8))?;
let icc_profile = if profile_type == ProfileType::EmbeddedIccProfile {
let icc_profile_length = read.read_u32::<LittleEndian>()? as usize;
read_bytes(read, icc_profile_length)?
} else {
Vec::new()
};
Ok(Self {
profile_type,
flags,
fixed_gamma,
icc_profile,
})
}
}