inline pnm decoder instead of using generalized load fn

* Simpler tokio runtime; 3 threads and no io driver

* switch benches over to other runtime

.github/workflows/rust.yml

@@ -11,7 +11,6 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  tip_release_path: RELEASE.md
 
 jobs:
   test-build:
@@ -107,39 +106,3 @@ jobs:
           generate_release_notes: true
           files: release-artifacts/*
           prerelease: ${{ contains(github.ref, 'alpha') || contains(github.ref, 'beta') || contains(github.ref, 'rc') }}
-
-  tip-release:
-    name: Release tip on push to main
-    runs-on: ubuntu-slim
-    if: github.event_name == 'push' && github.ref_name == 'main'
-    needs: test-build
-
-    steps:
-      - uses: actions/checkout@v6
-      - name: Download prebuilt artifacts
-        uses: actions/download-artifact@v7
-        with:
-          path: release-artifacts
-          merge-multiple: true
-
-      - name: Generate release notes
-        run: |
-          tree release-artifacts/
-          echo "From commit: $(git rev-parse --short HEAD)" > ${{ env.tip_release_path }}
-          echo "Generated on: $(date -u +"%Y-%m-%d %H:%M") UTC" >> ${{ env.tip_release_path }}
-          cat ${{ env.tip_release_path }}
-
-      - name: Update the tip tag
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git tag --force tip && git push --force origin tag tip
-
-      - name: Update the draft tip release
-        uses: softprops/action-gh-release@v2
-        with:
-          prerelease: true
-          files: release-artifacts/*
-          tag_name: tip
-          name: Tip Build
-          body_path: ${{ env.tip_release_path }}

src/converter.rs

@@ -1,11 +1,12 @@
 use std::{
+	io::Cursor,
 	num::NonZeroUsize,
 	time::{SystemTime, UNIX_EPOCH}
 };
 
 use flume::{Receiver, SendError, Sender, TryRecvError};
 use futures_util::stream::StreamExt as _;
-use image::DynamicImage;
+use image::{DynamicImage, codecs::pnm::PnmDecoder};
 use kittage::{NumberOrId, action::NONZERO_ONE};
 use ratatui::layout::Rect;
 use ratatui_image::{
@@ -111,22 +112,26 @@ pub async fn run_conversion_loop(
 			return Ok(None);
 		};
 
-		let mut dyn_img = image::load_from_memory_with_format(
+		let decoder = PnmDecoder::new(Cursor::new(&page_info.img_data.pixels)).map_err(|e| {
-			&page_info.img_data.pixels,
+			RenderError::Converting(format!(
-			image::ImageFormat::Pnm
+				"The image data provided from mupdf was not in pnm format ({e}); don't know how to convert"
-		)
+			))
-		.map_err(|e| RenderError::Converting(format!("Can't load image: {e}")))?;
+		})?;
+
+		// The image we get should always already be `ImageRgb8`, so this `into` shouldn't do any
+		// conversions or anything, but just in case some underlying detail of mupdf or image
+		// changes, we do the `into` instead of just `match + unreachable!()` to avoid panicking
+		let mut dyn_img = DynamicImage::from_decoder(decoder)
+			.map_err(|e| RenderError::Converting(format!("Can't load image: {e}")))?
+			.into_rgb8();
 
-		match dyn_img {
-			DynamicImage::ImageRgb8(ref mut img) =>
 		for quad in &*page_info.result_rects {
-					img.par_enumerate_pixels_mut()
+			dyn_img
+				.par_enumerate_pixels_mut()
 				.filter(|(x, y, _)| {
 					*x > quad.ul_x && *x < quad.lr_x && *y > quad.ul_y && *y < quad.lr_y
 				})
 				.for_each(|(_, _, px)| px.0[2] = px.0[2].saturating_sub(u8::MAX / 2));
-				},
-			_ => unreachable!()
 		}
 
 		let img_area = Rect {
@@ -136,6 +141,8 @@ pub async fn run_conversion_loop(
 			y: 0
 		};
 
+		let dyn_img = DynamicImage::ImageRgb8(dyn_img);
+
 		let txt_img = match picker.protocol_type() {
 			ProtocolType::Kitty => {
 				let rn = SystemTime::now()