lashman
a29256921e
- Add ResizeAlgorithm enum (Lanczos3/CatmullRom/Bilinear/Nearest) to core - Thread algorithm selection from UI ComboRow through ProcessingJob to resize_image - Add OverwriteBehavior enum (AutoRename/Overwrite/Skip) to core - Implement overwrite handling in executor with auto-rename suffix logic - Wire overwrite behavior from output step through to processing job - Fix rotation/flip to apply when resize step is enabled, not just adjustments
75 lines
2.3 KiB
Rust
75 lines
2.3 KiB
Rust
use fast_image_resize::{images::Image, Resizer, ResizeOptions, ResizeAlg, FilterType};
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use crate::error::{PixstripError, Result};
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use crate::types::Dimensions;
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use super::{ResizeConfig, ResizeAlgorithm};
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pub fn resize_image(
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src: &image::DynamicImage,
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config: &ResizeConfig,
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) -> Result<image::DynamicImage> {
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resize_image_with_algorithm(src, config, ResizeAlgorithm::default())
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}
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pub fn resize_image_with_algorithm(
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src: &image::DynamicImage,
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config: &ResizeConfig,
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algorithm: ResizeAlgorithm,
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) -> Result<image::DynamicImage> {
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let original = Dimensions {
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width: src.width(),
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height: src.height(),
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};
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let target = config.target_for(original);
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if target.width == original.width && target.height == original.height {
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return Ok(src.clone());
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}
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let src_rgba = src.to_rgba8();
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let (src_w, src_h) = (src_rgba.width(), src_rgba.height());
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let src_image = Image::from_vec_u8(
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src_w,
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src_h,
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src_rgba.into_raw(),
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fast_image_resize::PixelType::U8x4,
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)
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.map_err(|e| PixstripError::Processing {
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operation: "resize".into(),
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reason: format!("Failed to create source image: {}", e),
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})?;
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let mut dst_image = Image::new(
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target.width,
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target.height,
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fast_image_resize::PixelType::U8x4,
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);
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let mut resizer = Resizer::new();
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let alg = match algorithm {
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ResizeAlgorithm::Lanczos3 => ResizeAlg::Convolution(FilterType::Lanczos3),
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ResizeAlgorithm::CatmullRom => ResizeAlg::Convolution(FilterType::CatmullRom),
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ResizeAlgorithm::Bilinear => ResizeAlg::Convolution(FilterType::Bilinear),
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ResizeAlgorithm::Nearest => ResizeAlg::Nearest,
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};
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let options = ResizeOptions::new().resize_alg(alg);
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resizer
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.resize(&src_image, &mut dst_image, &options)
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.map_err(|e| PixstripError::Processing {
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operation: "resize".into(),
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reason: format!("Resize failed: {}", e),
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})?;
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let result_buf: image::RgbaImage =
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image::ImageBuffer::from_raw(target.width, target.height, dst_image.into_vec())
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.ok_or_else(|| PixstripError::Processing {
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operation: "resize".into(),
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reason: "Failed to create output image buffer".into(),
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})?;
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Ok(image::DynamicImage::ImageRgba8(result_buf))
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}
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