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use gif::{DecodeOptions, DisposalMethod, Encoder, Frame};
#[test]
fn frame_consistency_is_configurable() {
let image = create_image_with_oob_frames();
{
let options = DecodeOptions::new();
let mut data = image.as_slice();
let mut decoder = options.clone().read_info(&mut data).unwrap();
assert!(decoder.read_next_frame().is_ok());
assert!(decoder.read_next_frame().is_ok());
}
{
let mut options = DecodeOptions::new();
options.check_frame_consistency(true);
let mut data = image.as_slice();
let mut decoder = options.clone().read_info(&mut data).unwrap();
assert!(decoder.read_next_frame().is_ok());
assert!(decoder.read_next_frame().is_err());
}
{
let mut options = DecodeOptions::new();
options.check_frame_consistency(false);
let mut data = image.as_slice();
let mut decoder = options.clone().read_info(&mut data).unwrap();
assert!(decoder.read_next_frame().is_ok());
assert!(decoder.read_next_frame().is_ok());
}
}
fn create_image_with_oob_frames() -> Vec<u8> {
let mut data = vec![];
let mut encoder = Encoder::new(&mut data, 2, 2, &[0, 0, 0]).unwrap();
let mut frame = Frame {
delay: 1,
dispose: DisposalMethod::Any,
transparent: None,
needs_user_input: false,
top: 0,
left: 0,
width: 2,
height: 2,
interlaced: false,
palette: None,
buffer: vec![0, 0, 0, 0].into(),
};
encoder.write_frame(&frame).unwrap();
frame.top = 1;
frame.left = 1;
encoder.write_frame(&frame).unwrap();
drop(encoder);
data
}
#[test]
fn check_for_end_code_is_configurable() {
// In this particular image, the image data of the 62nd frame has no end code.
let image: &[u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/samples/gifplayer-muybridge.gif"));
{
let options = DecodeOptions::new();
let mut decoder = options.clone().read_info(&image[..]).unwrap();
for _ in 0..61 {
assert!(decoder.read_next_frame().is_ok());
}
assert!(decoder.read_next_frame().is_ok());
}
{
let mut options = DecodeOptions::new();
options.check_lzw_end_code(true);
let mut decoder = options.clone().read_info(&image[..]).unwrap();
for _ in 0..61 {
assert!(decoder.read_next_frame().is_ok());
}
assert!(decoder.read_next_frame().is_err());
}
}
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