45 lines
796 B
Rust
45 lines
796 B
Rust
//! QuickDraw PICT R5G5B5 `PixMap`s.
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use crate::{bin::{check_data, u16b}, err::*, image::{*, pict::{pm, rle}}};
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/// Reads a R5G5B5 `PixMap`.
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pub fn read(mut im: Image8,
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b: &[u8],
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hdr: pm::head::Header) -> ResultS<Image8>
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{
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let mut p = 0;
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if hdr.pitch < 8 || hdr.pack_t == pm::head::PackType::None {
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// uncompressed R5G5B5
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for _ in 0..im.h() {
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for _ in 0..im.w() {
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let cr = u16b(&b[p..]);
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im.cr.push(r5g5b5_to_rgb8(cr));
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p += 2;
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}
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}
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Ok(im)
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} else if hdr.rle {
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// RLE compressed R5G5B5
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for _ in 0..im.h() {
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let (d, pp) = rle::read::<u16>(&b[p..], hdr.pitch)?;
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check_data(&d, im.w())?;
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p += pp;
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for &cr in &d {
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im.cr.push(r5g5b5_to_rgb8(cr));
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}
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}
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Ok(im)
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} else {
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bail!("invalid configuration")
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}
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}
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// EOF
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