convertis/plugins/jpeg_to_png.rs

// Copyright (C) 2026 Elias Wendland <eliaswendland@pm.me>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3 exclusively.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

use crate::plugin::Plugin;
use image::ImageFormat;
use std::io::Cursor;
use std::path::Path;

pub struct PluginImpl;

impl Plugin for PluginImpl {
    fn name(&self) -> &'static str {
        "jpeg_to_png"
    }
    fn from_formats(&self) -> Vec<&'static str> {
        vec!["jpeg"]
    }
    fn to_formats(&self) -> Vec<&'static str> {
        vec!["png"]
    }
    fn familiarity(&self, _from: &str, _to: &str) -> u8 {
        255
    }
    fn quality(&self, _from: &str, _to: &str) -> u8 {
        255
    }
    fn speed(&self, _from: &str, _to: &str) -> u8 {
        200
    }

    fn convert(
        &self,
        input: &[u8],
        _from: &str,
        _to: &str,
        _temp_dir: &Path,
    ) -> Result<Vec<u8>, String> {
        let img = image::load_from_memory_with_format(input, ImageFormat::Jpeg)
            .map_err(|e| e.to_string())?;
        let mut buf = Vec::new();
        img.write_to(&mut Cursor::new(&mut buf), ImageFormat::Png)
            .map_err(|e| e.to_string())?;
        Ok(buf)
    }
}