aseprite_loader/binary/chunks/
mask.rs

1use nom::bytes::complete::take;
2
3use crate::binary::{
4    errors::ParseResult,
5    scalars::{parse_string, short, word, Short, Word},
6};
7
8#[derive(Debug)]
9pub struct MaskChunk<'a> {
10    /// X position
11    pub x: Short,
12    /// Y position
13    pub y: Short,
14    /// Width
15    pub width: Word,
16    /// Height
17    pub height: Word,
18    /// Mask name
19    pub name: &'a str,
20    /// Bit map data (size = height*((width+7)/8))
21    /// Each byte contains 8 pixels (the leftmost pixels are
22    /// packed into the high order bits)
23    ///
24    /// Important: The length of the data is NOT checked by
25    /// the parser. If you really need this you should make
26    /// sure that `data.len() == height * ((width + 7) / 8`
27    /// is true.
28    pub data: &'a [u8],
29}
30
31pub fn parse_mask_chunk(input: &[u8]) -> ParseResult<'_, MaskChunk<'_>> {
32    let (input, x) = short(input)?;
33    let (input, y) = short(input)?;
34    let (input, width) = word(input)?;
35    let (input, height) = word(input)?;
36    let (input, _) = take(8usize)(input)?;
37    let (input, name) = parse_string(input)?;
38    // The parser should ensure that there are enough bytes
39    // available to read. Since this is the only frame that
40    // needs the `width` and `height` from the `Header` and
41    // this frame is deprecated anyways this check was left
42    // to the users of this library.
43    //let size = height * ((width + 7) / 8);
44    //let (input, data) = take(size)(input)?;
45    Ok((
46        &input[input.len()..],
47        MaskChunk {
48            x,
49            y,
50            width,
51            height,
52            name,
53            data: input,
54        },
55    ))
56}
aseprite_loader/binary/chunks/mask.rs

aseprite_loader/binary/chunks/
mask.rs
