Merge pull request #26 from image-rs/new-release

Release 1.2.0

Author: 197g

.github/workflows/rust.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: ["1.36.0", stable, beta, nightly]
+        rust: ["1.56.0", stable, beta, nightly]
         command: [build, test]
     steps:
     - uses: actions/checkout@v2
@@ -18,7 +18,7 @@ jobs:
       run: >
         cargo build --verbose
     - name: test
-      if: ${{ matrix.rust != '1.36.0' }}
+      if: ${{ matrix.rust != '1.56.0' }}
       run: >
         cargo test --tests --benches
       # TODO: add criterion benchmarks?

CHANGELOG.md

@@ -1,3 +1,12 @@
+## 2.0.0
+
+- Add `no_std` support using `core` and `alloc` only, and raise the MSRV from Rust 1.34.2 to 1.36.0 (https://github.com/image-rs/color_quant/pull/24)
+- Add `NeuQuant::color_map_alpha` for retrieving the palette alpha channel, useful for PNG `tRNS` chunks (https://github.com/image-rs/color_quant/pull/23)
+- Fix `search_netindex` so palette index 0 is checked and both search directions are handled correctly (https://github.com/image-rs/color_quant/pull/16)
+- Fix a sampling prime typo by changing `478` to `487` (https://github.com/image-rs/color_quant/pull/14)
+- Forbid unsafe code in the crate (https://github.com/image-rs/color_quant/pull/22)
+- Improve and specialize internal math operations used by the quantizer, and document their provenance (https://github.com/image-rs/color_quant/pull/24)
+
 ## 1.1.0
 
 - Unify with `image::math::nq` as per https://github.com/image-rs/image/issues/1338 (https://github.com/image-rs/color_quant/pull/10)

Cargo.toml

@@ -1,8 +1,18 @@
 [package]
 name = "color_quant"
+version = "2.0.0"
+edition = "2021"
+resolver = "2"
+
+# For now, the minimal version where this field can be defined and respected.
+rust-version = "1.56"
+
 license = "MIT"
-version = "1.1.0"
-authors = ["nwin <nwin@users.noreply.github.com>"]
-readme = "README.md"
 description = "Color quantization library to reduce n colors to 256 colors."
+authors = ["nwin <nwin@users.noreply.github.com>", "The image-rs Developers"]
+readme = "README.md"
+
+documentation = "https://docs.rs/color_quant"
 repository = "https://github.com/image-rs/color_quant.git"
+homepage = "https://github.com/image-rs/color_quant"
+categories = ["multimedia::images"]

src/lib.rs

@@ -68,7 +68,6 @@ that this copyright notice remain intact.
 //! let indixes: Vec<u8> = data.chunks(4).map(|pix| nq.index_of(pix) as u8).collect();
 //! let color_map = nq.color_map_rgba();
 //! ```
-
 #![forbid(unsafe_code)]
 #![no_std]
 
@@ -101,12 +100,8 @@ pub enum ControlFlow {
 }
 
 impl ControlFlow {
-    fn is_break(self) -> bool {
-        if let ControlFlow::Break = self {
-            true
-        } else {
-            false
-        }
+    fn is_break(&self) -> bool {
+        matches!(self, ControlFlow::Break)
     }
 }
 
@@ -147,7 +142,7 @@ impl NeuQuant {
             netindex: vec![0; 256],
             bias: Vec::with_capacity(netsize),
             freq: Vec::with_capacity(netsize),
-            samplefac: samplefac,
+            samplefac,
             netsize: colors,
         };
         this.init(pixels);
@@ -171,7 +166,7 @@ impl NeuQuant {
                 r: tmp,
                 g: tmp,
                 b: tmp,
-                a: a,
+                a,
             });
             self.colormap.push(Color {
                 r: 0,
@@ -326,7 +321,7 @@ impl NeuQuant {
         }
         self.freq[bestpos as usize] += BETA;
         self.bias[bestpos as usize] -= BETAGAMMA;
-        return bestbiaspos;
+        bestbiaspos
     }
 
     /// Main learning loop
@@ -449,7 +444,7 @@ impl NeuQuant {
     }
     /// Search for best matching color
     fn search_netindex(&self, b: u8, g: u8, r: u8, a: u8) -> usize {
-        let mut best_dist = core::i32::MAX;
+        let mut best_dist = i32::MAX;
         let first_guess = self.netindex[g as usize];
         let mut best_pos = first_guess;
         let mut i = best_pos;

src/math.rs

@@ -12,7 +12,7 @@ pub(crate) fn abs(a: f64) -> f64 {
     } else if a.is_sign_negative() {
         -a
     } else {
-        core::f64::NAN
+        f64::NAN
     }
 }