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use crate::{
error::{OBIError, OBIResult},
CompressionType, Image,
};
use std::io::Write;
use png::{BitDepth, ColorType, Encoder, Writer};
pub fn to_png<W: Write>(writer: W, img: &Image) -> Writer<W> {
let mut encoder = Encoder::new(writer, img.width(), img.height());
encoder.set_color(ColorType::RGBA);
encoder.set_depth(BitDepth::Eight);
let mut writer = encoder.write_header().unwrap();
writer
.write_image_data(
&img.data
.iter()
.take((img.width() * img.height()) as usize)
.map(|x| if *x { vec![255; 4] } else { vec![0, 0, 0, 255] })
.flatten()
.collect::<Vec<_>>()[..],
)
.unwrap();
writer
}
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