From 35d594032e728a3400b117d6d959edfb6e285bf1 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 15:40:22 +0200
Subject: [PATCH 01/17] Add no_std support

---
 Cargo.toml    |  7 ++++++-
 src/base83.rs |  3 +++
 src/error.rs  | 24 ++++++++++++++----------
 src/lib.rs    | 16 +++++++++++++++-
 4 files changed, 38 insertions(+), 12 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 259a3c0..d19e13b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,9 +10,13 @@ version = "0.2.3"
 authors = ["Ruben De Smet <ruben.de.smet@rubdos.be>", "Raincal <cyj94228@gmail.com>"]
 edition = "2018"
 
+[lib]
+crate-type = ["cdylib", "rlib"]
+
 [dependencies]
 image = { version = ">= 0.23, <= 0.25", optional = true }
 gdk-pixbuf = { version = ">= 0.18, <= 0.19", optional = true }
+num-traits = { version = "0.2", default-features = false, features = ["libm"] }
 
 [dev-dependencies]
 image = ">= 0.23, <= 0.25"
@@ -20,7 +24,8 @@ criterion = "0.5"
 proptest = "1"
 
 [features]
-default = ["fast-linear-to-srgb"]
+default = ["fast-linear-to-srgb", "std"]
+std = []
 image = [ "dep:image" ]
 gdk-pixbuf = [ "dep:gdk-pixbuf" ]
 fast-linear-to-srgb = []
diff --git a/src/base83.rs b/src/base83.rs
index 1593679..98bf7b9 100644
--- a/src/base83.rs
+++ b/src/base83.rs
@@ -1,3 +1,6 @@
+#[cfg(not(feature = "std"))]
+use alloc::string::String;
+
 use crate::Error;
 
 include!(concat!(env!("OUT_DIR"), "/base83_lookup.rs"));
diff --git a/src/error.rs b/src/error.rs
index 3910428..689f6cc 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,4 +1,4 @@
-use std::fmt;
+use core::fmt;
 
 #[derive(Debug)]
 pub enum Error {
@@ -11,18 +11,22 @@ pub enum Error {
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let message = match self {
-            Error::HashTooShort => "blurhash must be at least 6 characters long".to_string(),
-            Error::LengthMismatch { expected, actual } => format!(
+        match self {
+            Error::HashTooShort => write!(f, "blurhash must be at least 6 characters long"),
+            Error::LengthMismatch { expected, actual } => write!(
+                f,
                 "blurhash length mismatch: length is {} but it should be {}",
                 actual, expected
             ),
-            Error::InvalidBase83(byte) => format!("Invalid base83 character: {:?}", *byte as char),
-            Error::InvalidAscii => "blurhash must be valid ASCII".into(),
-            Error::ComponentsOutOfRange => "blurhash must have between 1 and 9 components".into(),
-        };
-        write!(f, "{}", message)
+            Error::InvalidBase83(byte) => {
+                write!(f, "Invalid base83 character: {:?}", *byte as char)
+            }
+            Error::InvalidAscii => write!(f, "blurhash must be valid ASCII"),
+            Error::ComponentsOutOfRange => {
+                write!(f, "blurhash must have between 1 and 9 components")
+            }
+        }
     }
 }
 
-impl std::error::Error for Error {}
+impl core::error::Error for Error {}
diff --git a/src/lib.rs b/src/lib.rs
index 05c3a05..68839d4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,6 @@
+#![cfg_attr(not(any(test, feature = "std")), no_std)]
+#![cfg_attr(not(any(test, feature = "std")), feature(error_in_core))]
+
 //! A pure Rust implementation of [woltapp/blurhash][1].
 //!
 //! ### Encoding
@@ -27,9 +30,20 @@ mod dc;
 mod error;
 mod util;
 
+#[cfg(not(feature = "std"))]
+#[macro_use]
+extern crate alloc;
+
+#[cfg(not(feature = "std"))]
+use alloc::{string::String, vec::Vec};
+
+#[cfg(not(feature = "std"))]
+#[allow(unused_imports)]
+use num_traits::real::Real;
+
 pub use error::Error;
 
-use std::f32::consts::PI;
+use core::f32::consts::PI;
 use util::{linear_to_srgb, srgb_to_linear};
 
 /// Calculates the blurhash for an image using the given x and y component counts.

From 1857b096ecfef6419bd97eac2e228573fab083c0 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 15:50:54 +0200
Subject: [PATCH 02/17] Add feature matrix to CI

---
 .github/workflows/build.yml | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 394c27c..6d929a5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,6 +24,19 @@ jobs:
       matrix:
         toolchain: ["stable", "beta"]
         coverage: [false]
+        features: [
+          # With std
+          "std,gdk-pixbuf",
+          "std,gdk-pixbuf,fast-linear-to-srgb",
+          "std,image",
+          "std,image,fast-linear-to-srgb",
+          "std,fast-linear-to-srgb",
+          "std",
+
+          # no_std
+          "fast-linear-to-srgb",
+          "",
+        ]
         include:
           - toolchain: "nightly"
             coverage: true
@@ -47,18 +60,25 @@ jobs:
 
       - name: Run tests with default features
         uses: actions-rs/cargo@v1
-        if: ${{ !matrix.coverage }}
+        if: ${{ !matrix.coverage && matrix.features == '' }}
         with:
           command: test
           args: --all-targets --no-fail-fast
 
       - name: Run tests with all features
         uses: actions-rs/cargo@v1
-        if: ${{ !matrix.coverage }}
+        if: ${{ !matrix.coverage && matrix.features == '' }}
         with:
           command: test
           args: --all-targets --no-fail-fast --all-features
 
+      - name: Run tests with ${{ matrix.features }}
+        uses: actions-rs/cargo@v1
+        if: ${{ !matrix.coverage && matrix.features != '' }}
+        with:
+          command: test
+          args: --all-targets --no-fail-fast --no-default-features --features ${{ matrix.features }}
+
       - name: Run doc tests
         uses: actions-rs/cargo@v1
         if: ${{ !matrix.coverage }}

From 5d19aa6588cfbb8272aba5f8f896a1eb9bfd1292 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 15:56:44 +0200
Subject: [PATCH 03/17] Only execute no_std tests on nightly

---
 .github/workflows/build.yml | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6d929a5..37f5905 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -32,14 +32,17 @@ jobs:
           "std,image,fast-linear-to-srgb",
           "std,fast-linear-to-srgb",
           "std",
-
-          # no_std
-          "fast-linear-to-srgb",
-          "",
         ]
         include:
           - toolchain: "nightly"
             coverage: true
+            features: ""
+          - toolchain: "nightly"
+            coverage: false
+            features: "fast-linear-to-srgb"
+          - toolchain: "nightly"
+            coverage: false
+            features: ""
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2

From 4e9777357978f20ec274d1b8736ab39489cb5bb1 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 15:59:43 +0200
Subject: [PATCH 04/17] Use std::error on std builds

---
 src/error.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/error.rs b/src/error.rs
index 689f6cc..2f140de 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -29,4 +29,7 @@ impl fmt::Display for Error {
     }
 }
 
+#[cfg(not(feature = "std"))]
 impl core::error::Error for Error {}
+#[cfg(feature = "std")]
+impl std::error::Error for Error {}

From 9254a30ebaccc0caf61d437208a48af57ec0bf6f Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 16:03:52 +0200
Subject: [PATCH 05/17] Document no_std usage

---
 README.md  | 11 ++++++++++-
 src/lib.rs |  1 -
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index ab25377..d194c1d 100644
--- a/README.md
+++ b/README.md
@@ -23,9 +23,18 @@ If this overhead is problematic, you can disable it by instead specifying the fo
 
 ```toml
 [dependencies]
-blurhash = { version = "0.2.3", default-features = false }
+blurhash = { version = "0.2.3", default-features = false, features = ["std"] }
 ```
 
+Blurhash can also run in `no_std` environments (with `alloc`) by disabling the default features:
+
+```toml
+[dependencies]
+blurhash = { version = "0.2.4", default-features = false, features = ["fast-linear-to-srgb"] }
+```
+
+Blurhash requires Rust 1.82 or later when using `no_std`.
+
 ### Encoding
 ```rust
 use blurhash::encode;
diff --git a/src/lib.rs b/src/lib.rs
index 68839d4..1a5c9ef 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,4 @@
 #![cfg_attr(not(any(test, feature = "std")), no_std)]
-#![cfg_attr(not(any(test, feature = "std")), feature(error_in_core))]
 
 //! A pure Rust implementation of [woltapp/blurhash][1].
 //!

From 77692e387eec06899c1040955ce32e5d61fbbe7e Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 16:05:22 +0200
Subject: [PATCH 06/17] Enable empty featureset test

---
 .github/workflows/build.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 37f5905..3db6668 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -75,12 +75,12 @@ jobs:
           command: test
           args: --all-targets --no-fail-fast --all-features
 
-      - name: Run tests with ${{ matrix.features }}
+      - name: "Run tests with features: ${{ matrix.features }}"
         uses: actions-rs/cargo@v1
-        if: ${{ !matrix.coverage && matrix.features != '' }}
+        if: ${{ !matrix.coverage }}
         with:
           command: test
-          args: --all-targets --no-fail-fast --no-default-features --features ${{ matrix.features }}
+          args: --all-targets --no-fail-fast --no-default-features --features "${{ matrix.features }}"
 
       - name: Run doc tests
         uses: actions-rs/cargo@v1

From 93c1022afc0a225222ba74bf9b10abe2e5660254 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 16:20:33 +0200
Subject: [PATCH 07/17] Run default/all-features on empty OR std featureset

---
 .github/workflows/build.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3db6668..4d00aa0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -63,14 +63,14 @@ jobs:
 
       - name: Run tests with default features
         uses: actions-rs/cargo@v1
-        if: ${{ !matrix.coverage && matrix.features == '' }}
+        if: ${{ !matrix.coverage && (matrix.features == '' || matrix.features == 'std')  }}
         with:
           command: test
           args: --all-targets --no-fail-fast
 
       - name: Run tests with all features
         uses: actions-rs/cargo@v1
-        if: ${{ !matrix.coverage && matrix.features == '' }}
+        if: ${{ !matrix.coverage && (matrix.features == '' || matrix.features == 'std') }}
         with:
           command: test
           args: --all-targets --no-fail-fast --all-features

From 5708e4c7b18b4d326fe1e1793f2939c7c26c7d49 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 16:21:23 +0200
Subject: [PATCH 08/17] Document no-std CI

---
 .github/workflows/build.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4d00aa0..77035ce 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -34,12 +34,16 @@ jobs:
           "std",
         ]
         include:
+          # Coverage on nightly
           - toolchain: "nightly"
             coverage: true
             features: ""
+
+          # no-std build and tests
           - toolchain: "nightly"
             coverage: false
             features: "fast-linear-to-srgb"
+
           - toolchain: "nightly"
             coverage: false
             features: ""

From 8c83d712c170c2d299b6f2a5fdfb2e582993471f Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 17:07:09 +0200
Subject: [PATCH 09/17] Add wasm feature

---
 Cargo.toml  |  4 ++++
 src/lib.rs  |  3 +++
 src/wasm.rs | 29 +++++++++++++++++++++++++++++
 3 files changed, 36 insertions(+)
 create mode 100644 src/wasm.rs

diff --git a/Cargo.toml b/Cargo.toml
index d19e13b..742074d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,6 +17,8 @@ crate-type = ["cdylib", "rlib"]
 image = { version = ">= 0.23, <= 0.25", optional = true }
 gdk-pixbuf = { version = ">= 0.18, <= 0.19", optional = true }
 num-traits = { version = "0.2", default-features = false, features = ["libm"] }
+wasm-bindgen = { version = "0.2", optional = true }
+js-sys = { version = "0.3", optional = true }
 
 [dev-dependencies]
 image = ">= 0.23, <= 0.25"
@@ -30,6 +32,8 @@ image = [ "dep:image" ]
 gdk-pixbuf = [ "dep:gdk-pixbuf" ]
 fast-linear-to-srgb = []
 
+wasm = ["dep:wasm-bindgen", "dep:js-sys"]
+
 [[bench]]
 name = "decode"
 harness = false
diff --git a/src/lib.rs b/src/lib.rs
index 1a5c9ef..2c5d0b4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -40,6 +40,9 @@ use alloc::{string::String, vec::Vec};
 #[allow(unused_imports)]
 use num_traits::real::Real;
 
+#[cfg(feature = "wasm")]
+mod wasm;
+
 pub use error::Error;
 
 use core::f32::consts::PI;
diff --git a/src/wasm.rs b/src/wasm.rs
new file mode 100644
index 0000000..95c31d3
--- /dev/null
+++ b/src/wasm.rs
@@ -0,0 +1,29 @@
+#[cfg(not(feature = "std"))]
+use alloc::{
+    string::{String, ToString},
+    vec::Vec,
+};
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub fn encode(
+    components_x: u32,
+    components_y: u32,
+    width: u32,
+    height: u32,
+    rgba_image: &[u8],
+) -> Result<String, js_sys::Error> {
+    crate::encode(components_x, components_y, width, height, rgba_image)
+        .map_err(|err| js_sys::Error::new(&err.to_string()).into())
+}
+
+#[wasm_bindgen]
+pub fn decode(
+    blurhash: &str,
+    width: u32,
+    height: u32,
+    punch: f32,
+) -> Result<Vec<u8>, js_sys::Error> {
+    crate::decode(blurhash, width, height, punch)
+        .map_err(|err| js_sys::Error::new(&err.to_string()).into())
+}

From ad21ac0a3c6a59a89aa08fdd56ab5338870a24d3 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 17:08:04 +0200
Subject: [PATCH 10/17] Document WASM feature

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index d194c1d..227b9c9 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,15 @@ blurhash = { version = "0.2.4", default-features = false, features = ["fast-line
 
 Blurhash requires Rust 1.82 or later when using `no_std`.
 
+Blurhash can also be run with WebAssembly by enabling the `wasm` feature:
+
+```toml
+[dependencies]
+blurhash = { version = "0.2.4", features = ["wasm"] }
+```
+
+The `wasm` feature is compatible with `no_std`.
+
 ### Encoding
 ```rust
 use blurhash::encode;

From ee5d43fe7db46716bb8959c820f381b34241c659 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Tue, 23 Jul 2024 17:08:31 +0200
Subject: [PATCH 11/17] Add wasm to CI

---
 .github/workflows/build.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 77035ce..5282824 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,6 +31,8 @@ jobs:
           "std,image",
           "std,image,fast-linear-to-srgb",
           "std,fast-linear-to-srgb",
+          "std,fast-linear-to-srgb,wasm",
+          "std,wasm",
           "std",
         ]
         include:
@@ -44,6 +46,10 @@ jobs:
             coverage: false
             features: "fast-linear-to-srgb"
 
+          - toolchain: "nightly"
+            coverage: false
+            features: "wasm"
+
           - toolchain: "nightly"
             coverage: false
             features: ""

From 511fee0a8aadf361808f03bb5d6153e92f4fd702 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Wed, 24 Jul 2024 10:20:39 +0200
Subject: [PATCH 12/17] Add punch as option

---
 src/wasm.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/wasm.rs b/src/wasm.rs
index 95c31d3..cf5c386 100644
--- a/src/wasm.rs
+++ b/src/wasm.rs
@@ -22,8 +22,9 @@ pub fn decode(
     blurhash: &str,
     width: u32,
     height: u32,
-    punch: f32,
+    punch: Option<f32>,
 ) -> Result<Vec<u8>, js_sys::Error> {
+    let punch = punch.unwrap_or(1.0);
     crate::decode(blurhash, width, height, punch)
         .map_err(|err| js_sys::Error::new(&err.to_string()).into())
 }

From 5f4ff1a1d841cc1f037936b49bff373dd0fd4283 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Wed, 24 Jul 2024 10:56:10 +0200
Subject: [PATCH 13/17] Move wasm stuff into separate crate

---
 Cargo.toml                      |  16 +--
 blurhash-rs-wasm/.gitignore     |   6 +
 blurhash-rs-wasm/.travis.yml    |  69 +++++++++++
 blurhash-rs-wasm/Cargo.toml     |  27 +++++
 blurhash-rs-wasm/LICENSE-APACHE | 201 ++++++++++++++++++++++++++++++++
 blurhash-rs-wasm/LICENSE-MIT    |  25 ++++
 blurhash-rs-wasm/README.md      |  84 +++++++++++++
 blurhash-rs-wasm/src/lib.rs     |  45 +++++++
 blurhash-rs-wasm/src/utils.rs   |  10 ++
 blurhash-rs-wasm/tests/web.rs   |  13 +++
 src/ac.rs                       |   3 +
 src/lib.rs                      |   4 -
 src/util.rs                     |   3 +
 13 files changed, 495 insertions(+), 11 deletions(-)
 create mode 100644 blurhash-rs-wasm/.gitignore
 create mode 100644 blurhash-rs-wasm/.travis.yml
 create mode 100644 blurhash-rs-wasm/Cargo.toml
 create mode 100644 blurhash-rs-wasm/LICENSE-APACHE
 create mode 100644 blurhash-rs-wasm/LICENSE-MIT
 create mode 100644 blurhash-rs-wasm/README.md
 create mode 100644 blurhash-rs-wasm/src/lib.rs
 create mode 100644 blurhash-rs-wasm/src/utils.rs
 create mode 100644 blurhash-rs-wasm/tests/web.rs

diff --git a/Cargo.toml b/Cargo.toml
index 742074d..988df8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,15 +10,10 @@ version = "0.2.3"
 authors = ["Ruben De Smet <ruben.de.smet@rubdos.be>", "Raincal <cyj94228@gmail.com>"]
 edition = "2018"
 
-[lib]
-crate-type = ["cdylib", "rlib"]
-
 [dependencies]
 image = { version = ">= 0.23, <= 0.25", optional = true }
 gdk-pixbuf = { version = ">= 0.18, <= 0.19", optional = true }
 num-traits = { version = "0.2", default-features = false, features = ["libm"] }
-wasm-bindgen = { version = "0.2", optional = true }
-js-sys = { version = "0.3", optional = true }
 
 [dev-dependencies]
 image = ">= 0.23, <= 0.25"
@@ -32,8 +27,6 @@ image = [ "dep:image" ]
 gdk-pixbuf = [ "dep:gdk-pixbuf" ]
 fast-linear-to-srgb = []
 
-wasm = ["dep:wasm-bindgen", "dep:js-sys"]
-
 [[bench]]
 name = "decode"
 harness = false
@@ -41,3 +34,12 @@ harness = false
 [[bench]]
 name = "encode"
 harness = false
+
+[workspace]
+members = [
+    "blurhash-rs-wasm",
+]
+
+[profile.release] #.package.blurhash-rs-wasm]
+# Tell `rustc` to optimize for small code size.
+opt-level = "z"
diff --git a/blurhash-rs-wasm/.gitignore b/blurhash-rs-wasm/.gitignore
new file mode 100644
index 0000000..4e30131
--- /dev/null
+++ b/blurhash-rs-wasm/.gitignore
@@ -0,0 +1,6 @@
+/target
+**/*.rs.bk
+Cargo.lock
+bin/
+pkg/
+wasm-pack.log
diff --git a/blurhash-rs-wasm/.travis.yml b/blurhash-rs-wasm/.travis.yml
new file mode 100644
index 0000000..7a91325
--- /dev/null
+++ b/blurhash-rs-wasm/.travis.yml
@@ -0,0 +1,69 @@
+language: rust
+sudo: false
+
+cache: cargo
+
+matrix:
+  include:
+
+  # Builds with wasm-pack.
+  - rust: beta
+    env: RUST_BACKTRACE=1
+    addons:
+      firefox: latest
+      chrome: stable
+    before_script:
+      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
+      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
+      - cargo install-update -a
+      - curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
+    script:
+      - cargo generate --git . --name testing
+      # Having a broken Cargo.toml (in that it has curlies in fields) anywhere
+      # in any of our parent dirs is problematic.
+      - mv Cargo.toml Cargo.toml.tmpl
+      - cd testing
+      - wasm-pack build
+      - wasm-pack test --chrome --firefox --headless
+
+  # Builds on nightly.
+  - rust: nightly
+    env: RUST_BACKTRACE=1
+    before_script:
+      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
+      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
+      - cargo install-update -a
+      - rustup target add wasm32-unknown-unknown
+    script:
+      - cargo generate --git . --name testing
+      - mv Cargo.toml Cargo.toml.tmpl
+      - cd testing
+      - cargo check
+      - cargo check --target wasm32-unknown-unknown
+      - cargo check                                 --no-default-features
+      - cargo check --target wasm32-unknown-unknown --no-default-features
+      - cargo check                                 --no-default-features --features console_error_panic_hook
+      - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
+      - cargo check                                 --no-default-features --features "console_error_panic_hook wee_alloc"
+      - cargo check --target wasm32-unknown-unknown --no-default-features --features "console_error_panic_hook wee_alloc"
+
+  # Builds on beta.
+  - rust: beta
+    env: RUST_BACKTRACE=1
+    before_script:
+      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
+      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
+      - cargo install-update -a
+      - rustup target add wasm32-unknown-unknown
+    script:
+      - cargo generate --git . --name testing
+      - mv Cargo.toml Cargo.toml.tmpl
+      - cd testing
+      - cargo check
+      - cargo check --target wasm32-unknown-unknown
+      - cargo check                                 --no-default-features
+      - cargo check --target wasm32-unknown-unknown --no-default-features
+      - cargo check                                 --no-default-features --features console_error_panic_hook
+      - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
+      # Note: no enabling the `wee_alloc` feature here because it requires
+      # nightly for now.
diff --git a/blurhash-rs-wasm/Cargo.toml b/blurhash-rs-wasm/Cargo.toml
new file mode 100644
index 0000000..aab6025
--- /dev/null
+++ b/blurhash-rs-wasm/Cargo.toml
@@ -0,0 +1,27 @@
+[package]
+name = "blurhash-rs-wasm"
+version = "0.1.0"
+authors = ["Ruben De Smet <ruben.de.smet@rubdos.be>", "Raincal <cyj94228@gmail.com>"]
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook", "fast-linear-to-srgb"]
+fast-linear-to-srgb = ["blurhash/fast-linear-to-srgb"]
+
+[dependencies]
+wasm-bindgen = "0.2.84"
+js-sys = { version = "0.3" }
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.7", optional = true }
+
+blurhash = { path = "../", default-features = false, features = []}
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.34"
diff --git a/blurhash-rs-wasm/LICENSE-APACHE b/blurhash-rs-wasm/LICENSE-APACHE
new file mode 100644
index 0000000..11069ed
--- /dev/null
+++ b/blurhash-rs-wasm/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
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+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
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+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
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+   boilerplate notice, with the fields enclosed by brackets "[]"
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+Copyright [yyyy] [name of copyright owner]
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+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
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+
+Unless required by applicable law or agreed to in writing, software
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diff --git a/blurhash-rs-wasm/LICENSE-MIT b/blurhash-rs-wasm/LICENSE-MIT
new file mode 100644
index 0000000..9e6ddc5
--- /dev/null
+++ b/blurhash-rs-wasm/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2018 Ruben De Smet <ruben.de.smet@rubdos.be>
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/blurhash-rs-wasm/README.md b/blurhash-rs-wasm/README.md
new file mode 100644
index 0000000..6b68408
--- /dev/null
+++ b/blurhash-rs-wasm/README.md
@@ -0,0 +1,84 @@
+<div align="center">
+
+  <h1><code>wasm-pack-template</code></h1>
+
+  <strong>A template for kick starting a Rust and WebAssembly project using <a href="https://github.com/rustwasm/wasm-pack">wasm-pack</a>.</strong>
+
+  <p>
+    <a href="https://travis-ci.org/rustwasm/wasm-pack-template"><img src="https://img.shields.io/travis/rustwasm/wasm-pack-template.svg?style=flat-square" alt="Build Status" /></a>
+  </p>
+
+  <h3>
+    <a href="https://rustwasm.github.io/docs/wasm-pack/tutorials/npm-browser-packages/index.html">Tutorial</a>
+    <span> | </span>
+    <a href="https://discordapp.com/channels/442252698964721669/443151097398296587">Chat</a>
+  </h3>
+
+  <sub>Built with 🦀🕸 by <a href="https://rustwasm.github.io/">The Rust and WebAssembly Working Group</a></sub>
+</div>
+
+## About
+
+[**📚 Read this template tutorial! 📚**][template-docs]
+
+This template is designed for compiling Rust libraries into WebAssembly and
+publishing the resulting package to NPM.
+
+Be sure to check out [other `wasm-pack` tutorials online][tutorials] for other
+templates and usages of `wasm-pack`.
+
+[tutorials]: https://rustwasm.github.io/docs/wasm-pack/tutorials/index.html
+[template-docs]: https://rustwasm.github.io/docs/wasm-pack/tutorials/npm-browser-packages/index.html
+
+## 🚴 Usage
+
+### 🐑 Use `cargo generate` to Clone this Template
+
+[Learn more about `cargo generate` here.](https://github.com/ashleygwilliams/cargo-generate)
+
+```
+cargo generate --git https://github.com/rustwasm/wasm-pack-template.git --name my-project
+cd my-project
+```
+
+### 🛠️ Build with `wasm-pack build`
+
+```
+wasm-pack build
+```
+
+### 🔬 Test in Headless Browsers with `wasm-pack test`
+
+```
+wasm-pack test --headless --firefox
+```
+
+### 🎁 Publish to NPM with `wasm-pack publish`
+
+```
+wasm-pack publish
+```
+
+## 🔋 Batteries Included
+
+* [`wasm-bindgen`](https://github.com/rustwasm/wasm-bindgen) for communicating
+  between WebAssembly and JavaScript.
+* [`console_error_panic_hook`](https://github.com/rustwasm/console_error_panic_hook)
+  for logging panic messages to the developer console.
+* `LICENSE-APACHE` and `LICENSE-MIT`: most Rust projects are licensed this way, so these are included for you
+
+## License
+
+Licensed under either of
+
+* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the Apache-2.0
+license, shall be dual licensed as above, without any additional terms or
+conditions.
diff --git a/blurhash-rs-wasm/src/lib.rs b/blurhash-rs-wasm/src/lib.rs
new file mode 100644
index 0000000..2440d10
--- /dev/null
+++ b/blurhash-rs-wasm/src/lib.rs
@@ -0,0 +1,45 @@
+#![no_std]
+mod utils;
+
+use wasm_bindgen::prelude::*;
+
+extern crate alloc;
+
+#[wasm_bindgen]
+extern "C" {
+    fn alert(s: &str);
+}
+
+#[wasm_bindgen]
+pub fn greet() {
+    alert("Hello, blurhash-rs-wasm!");
+}
+
+use alloc::{
+    string::{String, ToString},
+    vec::Vec,
+};
+
+#[wasm_bindgen]
+pub fn encode(
+    components_x: u32,
+    components_y: u32,
+    width: u32,
+    height: u32,
+    rgba_image: &[u8],
+) -> Result<String, js_sys::Error> {
+    blurhash::encode(components_x, components_y, width, height, rgba_image)
+        .map_err(|err| js_sys::Error::new(&err.to_string()).into())
+}
+
+#[wasm_bindgen]
+pub fn decode(
+    blurhash: &str,
+    width: u32,
+    height: u32,
+    punch: Option<f32>,
+) -> Result<Vec<u8>, js_sys::Error> {
+    let punch = punch.unwrap_or(1.0);
+    blurhash::decode(blurhash, width, height, punch)
+        .map_err(|err| js_sys::Error::new(&err.to_string()).into())
+}
diff --git a/blurhash-rs-wasm/src/utils.rs b/blurhash-rs-wasm/src/utils.rs
new file mode 100644
index 0000000..b1d7929
--- /dev/null
+++ b/blurhash-rs-wasm/src/utils.rs
@@ -0,0 +1,10 @@
+pub fn set_panic_hook() {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    #[cfg(feature = "console_error_panic_hook")]
+    console_error_panic_hook::set_once();
+}
diff --git a/blurhash-rs-wasm/tests/web.rs b/blurhash-rs-wasm/tests/web.rs
new file mode 100644
index 0000000..de5c1da
--- /dev/null
+++ b/blurhash-rs-wasm/tests/web.rs
@@ -0,0 +1,13 @@
+//! Test suite for the Web and headless browsers.
+
+#![cfg(target_arch = "wasm32")]
+
+extern crate wasm_bindgen_test;
+use wasm_bindgen_test::*;
+
+wasm_bindgen_test_configure!(run_in_browser);
+
+#[wasm_bindgen_test]
+fn pass() {
+    assert_eq!(1 + 1, 2);
+}
diff --git a/src/ac.rs b/src/ac.rs
index 63d1eeb..318d3a3 100644
--- a/src/ac.rs
+++ b/src/ac.rs
@@ -1,3 +1,6 @@
+#[cfg(not(feature = "std"))]
+use num_traits::real::Real;
+
 use super::util::sign_pow;
 
 pub fn encode(value: [f32; 3], maximum_value: f32) -> u32 {
diff --git a/src/lib.rs b/src/lib.rs
index 2c5d0b4..b78747c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -37,12 +37,8 @@ extern crate alloc;
 use alloc::{string::String, vec::Vec};
 
 #[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
 use num_traits::real::Real;
 
-#[cfg(feature = "wasm")]
-mod wasm;
-
 pub use error::Error;
 
 use core::f32::consts::PI;
diff --git a/src/util.rs b/src/util.rs
index 2c4d5c4..d112544 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -1,5 +1,8 @@
 include!(concat!(env!("OUT_DIR"), "/srgb_lookup.rs"));
 
+#[cfg(not(feature = "std"))]
+use num_traits::Float;
+
 /// linear 0.0-1.0 floating point to srgb 0-255 integer conversion.
 #[cfg(not(feature = "fast-linear-to-srgb"))]
 pub fn linear_to_srgb(value: f32) -> u8 {

From 3d887121834d40e46535c026ae777cba5014095e Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Wed, 24 Jul 2024 10:59:28 +0200
Subject: [PATCH 14/17] Remove wasm feature from ci

---
 .github/workflows/build.yml | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5282824..77035ce 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,8 +31,6 @@ jobs:
           "std,image",
           "std,image,fast-linear-to-srgb",
           "std,fast-linear-to-srgb",
-          "std,fast-linear-to-srgb,wasm",
-          "std,wasm",
           "std",
         ]
         include:
@@ -46,10 +44,6 @@ jobs:
             coverage: false
             features: "fast-linear-to-srgb"
 
-          - toolchain: "nightly"
-            coverage: false
-            features: "wasm"
-
           - toolchain: "nightly"
             coverage: false
             features: ""

From f938eb3e5657b0ee84c82aea666216ac0c20bac0 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Wed, 24 Jul 2024 11:54:55 +0200
Subject: [PATCH 15/17] Add unused guards to num-traits imports

When the test harness is built in lib mode, it seems that the `std`
feature flag is disabled, but the f32::* methods are actually available.
---
 src/ac.rs   | 3 ++-
 src/lib.rs  | 2 ++
 src/util.rs | 3 ++-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/ac.rs b/src/ac.rs
index 318d3a3..3bec956 100644
--- a/src/ac.rs
+++ b/src/ac.rs
@@ -1,4 +1,5 @@
-#[cfg(not(feature = "std"))]
+#[cfg(all(not(test), not(feature = "std")))]
+#[allow(unused)]
 use num_traits::real::Real;
 
 use super::util::sign_pow;
diff --git a/src/lib.rs b/src/lib.rs
index b78747c..31ad5ff 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -36,7 +36,9 @@ extern crate alloc;
 #[cfg(not(feature = "std"))]
 use alloc::{string::String, vec::Vec};
 
+#[cfg(not(test))]
 #[cfg(not(feature = "std"))]
+#[allow(unused)]
 use num_traits::real::Real;
 
 pub use error::Error;
diff --git a/src/util.rs b/src/util.rs
index d112544..944e120 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -1,6 +1,7 @@
 include!(concat!(env!("OUT_DIR"), "/srgb_lookup.rs"));
 
-#[cfg(not(feature = "std"))]
+#[cfg(all(not(test), not(feature = "std"), not(feature = "fast-linear-to-srgb")))]
+#[allow(unused)]
 use num_traits::Float;
 
 /// linear 0.0-1.0 floating point to srgb 0-255 integer conversion.

From 2c2907af318049672221560805fd9f61793a79da Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Wed, 24 Jul 2024 12:09:12 +0200
Subject: [PATCH 16/17] Add wasm job

---
 .github/workflows/build.yml | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 77035ce..e8ee41a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,6 +14,19 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  wasm:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install
+        run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+      - run: cd blurhash-rs-wasm
+      - run: cargo test
+      - run: wasm-pack test --headless --chrome
+      - run: wasm-pack test --headless --firefox
+
   build_and_test:
     name: cargo test
     runs-on: ubuntu-latest

From 69a9e2bab9cebe4b4c90ea85fed68dc333fac327 Mon Sep 17 00:00:00 2001
From: Ruben De Smet <ruben.de.smet@rubdos.be>
Date: Wed, 24 Jul 2024 13:02:37 +0200
Subject: [PATCH 17/17] Only test wasm subpackage in browser

---
 .github/workflows/build.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e8ee41a..c3125c7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,8 +24,8 @@ jobs:
 
       - run: cd blurhash-rs-wasm
       - run: cargo test
-      - run: wasm-pack test --headless --chrome
-      - run: wasm-pack test --headless --firefox
+      - run: wasm-pack test --headless --chrome -- --package blurhash-rs-wasm
+      - run: wasm-pack test --headless --firefox -- --package blurhash-rs-wasm
 
   build_and_test:
     name: cargo test