feat: add icns image support (internal png data only, load largest co…

…ntained image)

Cargo.toml

@@ -81,6 +81,7 @@ imageproc = { version = "0.24.0", features = ["rayon"] }
 zune-core = "0.4.12"
 num-traits = "0.2.18"
 zerocopy = "0.7.34"
+icns = "0.3.1"
 
 [features]
 heif = ["libheif-rs"]

README.md

@@ -65,6 +65,7 @@ pkgin install oculante
 - gif (animation support and correct timing)
 - hdr, tonemapped
 - ico
+- icns (via `rust-icns`)
 - jpeg
 - png
 - pnm

src/image_loader.rs

@@ -16,7 +16,7 @@ use quickraw::{data, DemosaicingMethod, Export, Input, Output, OutputType};
 use rayon::prelude::{IntoParallelIterator, IntoParallelRefIterator, ParallelIterator};
 use rgb::*;
 use std::fs::File;
-use std::io::BufReader;
+use std::io::{BufReader};
 use std::path::Path;
 use std::sync::mpsc::{channel, Receiver, Sender};
 use tiff::decoder::Limits;
@@ -716,6 +716,23 @@ pub fn open_image(img_location: &Path) -> Result<Receiver<Frame>> {
             _ = sender.send(Frame::new_still(d.to_rgba8()));
             return Ok(receiver);
         }
+        "icns" => {
+            let file = BufReader::new(File::open(img_location)?);
+            let icon_family = icns::IconFamily::read(file)?;
+
+            // loop over the largest icons, take the largest one and return
+            for icon_type in [icns::IconType::RGBA32_512x512_2x, icns::IconType::RGBA32_512x512, icns::IconType::RGBA32_256x256, icns::IconType::RGBA32_128x128] {
+                // just a vec to write the ong to
+                let mut target = vec![];
+                let image = icon_family.get_icon_with_type(icon_type)?;
+                image.write_png(&mut target)?;
+                let d = image::load_from_memory(&target).context("Load icns mem")?;
+                _ = sender.send(Frame::new_still(d.to_rgba8()));
+                return Ok(receiver);
+
+            }
+
+        }
         "tif" | "tiff" => match load_tiff(&img_location) {
             Ok(tiff) => {
                 _ = sender.send(Frame::new_still(tiff));

src/utils.rs

@@ -61,6 +61,7 @@ pub const SUPPORTED_EXTENSIONS: &[&str] = &[
     "sr2",
     "braw",
     "r3d",
+    "icns",
     "nrw",
     "raw",
     "avif",