| 1 | use crate::{util::{read_u16, Endian}, ImageResult, ImageSize}; |
|---|---|
| 2 | use std::io::{BufRead, Seek, SeekFrom}; |
| 3 | |
| 4 | pub fn size<R: BufRead + Seek>(reader: &mut R) -> ImageResult<ImageSize> { |
| 5 | reader.seek(pos:SeekFrom::Start(6))?; |
| 6 | |
| 7 | Ok(ImageSize { |
| 8 | width: read_u16(reader, &Endian::Little)? as usize, |
| 9 | height: read_u16(reader, &Endian::Little)? as usize, |
| 10 | }) |
| 11 | } |
| 12 | |
| 13 | pub fn matches(header: &[u8]) -> bool { |
| 14 | header.starts_with(needle:b"GIF8") |
| 15 | } |
| 16 |