66 lines
1.9 KiB
Rust
66 lines
1.9 KiB
Rust
use std::sync::Once;
|
|
|
|
use magick_rust::{bindings::FilterType_LanczosFilter, magick_wand_genesis, MagickWand};
|
|
use napi::{bindgen_prelude::Buffer, Error, Result, Status, Task};
|
|
|
|
static START: Once = Once::new();
|
|
|
|
pub struct LiquidRescaleTask {
|
|
input_image: Buffer,
|
|
output_width: usize,
|
|
output_height: usize,
|
|
}
|
|
|
|
impl LiquidRescaleTask {
|
|
#[inline]
|
|
pub fn new(
|
|
input_image: Buffer,
|
|
output_width: usize,
|
|
output_height: usize,
|
|
) -> LiquidRescaleTask {
|
|
LiquidRescaleTask {
|
|
input_image,
|
|
output_width,
|
|
output_height,
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
pub fn liquid_rescale(input_image: Vec<u8>, width: usize, height: usize) -> Result<Buffer> {
|
|
START.call_once(|| {
|
|
magick_wand_genesis();
|
|
});
|
|
|
|
let wand = MagickWand::new();
|
|
wand.read_image_blob(input_image)
|
|
.map_err(|err| Error::new(Status::InvalidArg, format!("{err}")))?;
|
|
let input_width = wand.get_image_width();
|
|
let input_height = wand.get_image_height();
|
|
wand.liquid_rescale_image(width, height, 1.0, 0.0)
|
|
.map_err(|err| Error::new(Status::GenericFailure, format!("{err}")))?;
|
|
wand.resize_image(input_width, input_height, FilterType_LanczosFilter);
|
|
let output_image = wand
|
|
.write_image_blob("JPEG")
|
|
.map_err(|err| Error::new(Status::GenericFailure, format!("{err}")))?;
|
|
|
|
Ok(output_image.into())
|
|
}
|
|
}
|
|
|
|
impl Task for LiquidRescaleTask {
|
|
type Output = Buffer;
|
|
type JsValue = Buffer;
|
|
|
|
fn compute(&mut self) -> Result<Self::Output> {
|
|
Self::liquid_rescale(
|
|
self.input_image.clone().into(),
|
|
self.output_width,
|
|
self.output_height,
|
|
)
|
|
}
|
|
|
|
fn resolve(&mut self, _env: napi::Env, output: Self::Output) -> Result<Self::JsValue> {
|
|
Ok(output)
|
|
}
|
|
}
|