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#![forbid(unsafe_code)]
#![warn(missing_docs)]
#![doc(
html_logo_url = "https://plopgrizzly.com/icon.svg",
html_favicon_url = "https://plopgrizzly.com/icon.svg"
)]
mod lodepng;
pub mod chunk;
pub mod prelude;
pub use crate::lodepng::Error as ParseError;
pub use pix::{Raster, RasterBuilder};
#[derive(Debug)]
pub enum DecodeError {
ParseError(ParseError),
ConversionError,
ReadError,
}
#[derive(Debug)]
pub enum EncodeError {
ParseError(ParseError),
WriteError,
}
pub struct Meta {}
#[allow(unused)]
pub struct ChunkDecoder<'a, R>
where
R: std::io::Read,
{
state: &'a mut lodepng::State,
bytes: R,
}
#[allow(unused)]
pub struct ChunkEncoder<'a, W>
where
W: std::io::Write,
{
state: &'a mut lodepng::State,
bytes: W,
}
pub struct RasterDecoder<'a, R>
where
R: std::io::Read,
{
state: &'a mut lodepng::State,
bytes: R,
has_decoded: bool,
}
impl<'a, R> RasterDecoder<'a, R>
where
R: std::io::Read,
{
pub fn meta(&self) -> Meta {
Meta {}
}
}
impl<'a, R> Iterator for RasterDecoder<'a, R>
where
R: std::io::Read,
{
type Item = Result<(pix::Raster<pix::Rgba8>, u64), DecodeError>;
fn next(&mut self) -> Option<Self::Item> {
if self.has_decoded {
return None;
}
self.has_decoded = true;
let mut bytes: Vec<u8> = vec![];
let raster = if self.bytes.read_to_end(&mut bytes).is_ok() {
match self.state.decode(bytes) {
Ok(o) => match o {
lodepng::Image::RGBA(img) => Ok((img, 0)),
_ => Err(DecodeError::ConversionError),
},
Err(e) => Err(DecodeError::ParseError(e)),
}
} else {
Err(DecodeError::ReadError)
};
Some(raster)
}
}
pub struct RasterEncoder<'a, W>
where
W: std::io::Write,
{
state: &'a mut lodepng::State,
bytes: W,
}
impl<'a, W> RasterEncoder<'a, W>
where
W: std::io::Write,
{
pub fn add_frame(
&mut self,
raster: &pix::Raster<pix::Rgba8>,
nanos: u64,
) -> Result<(), EncodeError> {
let _ = nanos;
let bytes = match self.state.encode(raster) {
Ok(o) => o,
Err(e) => return Err(EncodeError::ParseError(e)),
};
match self.bytes.write(&bytes) {
Ok(_size) => Ok(()),
Err(_) => return Err(EncodeError::WriteError),
}
}
}
#[derive(Default)]
pub struct DecoderBuilder {
state: lodepng::State,
}
impl DecoderBuilder {
pub fn new() -> Self {
Self::default()
}
pub fn check_crc(mut self) -> Self {
self.state.decoder.check_crc = true;
self
}
pub fn check_adler32(mut self) -> Self {
self.state.decoder.zlibsettings.check_adler32 = true;
self
}
pub fn decode_chunks<'a, R>(&'a mut self, bytes: R) -> ChunkDecoder<'a, R>
where
R: std::io::Read,
{
ChunkDecoder {
state: &mut self.state,
bytes,
}
}
pub fn decode_rasters<'a, R>(&'a mut self, bytes: R) -> RasterDecoder<'a, R>
where
R: std::io::Read,
{
RasterDecoder {
state: &mut self.state,
bytes,
has_decoded: false,
}
}
}
#[derive(Default)]
pub struct EncoderBuilder {
state: lodepng::State,
}
impl EncoderBuilder {
pub fn new() -> Self {
Self::default()
}
pub fn encode_chunks<'a, W>(&'a mut self, bytes: W) -> ChunkEncoder<'a, W>
where
W: std::io::Write,
{
ChunkEncoder {
state: &mut self.state,
bytes,
}
}
pub fn encode_rasters<'a, W>(&'a mut self, bytes: W) -> RasterEncoder<'a, W>
where
W: std::io::Write,
{
RasterEncoder {
state: &mut self.state,
bytes,
}
}
}