let dst = &mut dst[dpos..][..len];
br.read_buf(dst)?;
} else {
- let val = br.read_byte()?;
- for i in 0..len {
- dst[dpos + i] = val;
+ let val1 = br.read_byte()?;
+ let val2 = br.read_byte()?;
+ for i in (0..len).step_by(2) {
+ dst[dpos + i] = val1;
+ dst[dpos + i + 1] = val2;
}
}
dpos += len;
buf: Vec<u8>,
width: usize,
height: usize,
+ xoff: usize,
+ yoff: usize,
hams: HAMShuffler,
}
buf: Vec::new(),
width: 0,
height: 0,
+ xoff: 0,
+ yoff: 0,
hams: HAMShuffler::default(),
}
}
if (frame_x == 0xFFFF) && (frame_y == 0xFFFF) && (frame_l == 0xFFFF) && (frame_d == 0xFFFF) {
return Ok(false);
}
+ validate!(frame_x >= self.xoff && frame_y >= self.yoff);
validate!(frame_l >= frame_x && frame_d >= frame_y);
- validate!(frame_l < self.width && frame_d < self.height);
+ validate!(frame_l - self.xoff < self.width && frame_d - self.yoff < self.height);
if has_pal {
br.read_skip(2)?;
let w = frame_l + 1 - frame_x;
let h = frame_d + 1 - frame_y;
- let dpos = frame_x + frame_y * stride;
+ let dpos = frame_x - self.xoff + (frame_y - self.yoff) * stride;
let method = br.read_byte()?;
let is_intra;
if let Some(ref edata) = info.get_extradata() {
validate!(edata.len() == 0x330);
let unp_size = read_u32le(&edata[800..])? as usize;
- validate!(unp_size < self.width * self.height * 3 + 64); // just for sanity
+ validate!(unp_size < self.width * self.height * 4 + 64); // just for sanity
self.buf.resize(unp_size, 0);
for i in 0..768 {
let el = edata[28 + i];
self.pal[i] = (el << 2) | (el >> 4);
}
+ self.xoff = read_u16le(&edata[8..])? as usize;
+ self.yoff = read_u16le(&edata[10..])? as usize;
}
Ok(())