- Fixed implementation for Wasm32

- Added steps for GitHub Actions to run tests for Wasm32.

.github/workflows/check_and_test.yaml

@@ -11,6 +11,7 @@ env:
   CARGO_TERM_COLOR: always
   DONT_SAVE_RESULT: 1
   RAYON_NUM_THREADS: 4
+  CARGO_TARGET_WASM32_WASIP2_RUNNER: "wasmtime --dir=. --"
 
 jobs:
   run_tests:
@@ -29,6 +30,10 @@ jobs:
         with:
           cache-on-failure: "true"
 
+      - name: Check compilation for no_std
+        run: |
+          cargo build --no-default-features --features=no_std
+
       - name: Run single-thread tests
         run: |
           cargo check
@@ -39,6 +44,20 @@ jobs:
           cargo check --features rayon
           cargo test --features rayon
 
-      - name: Check compilation for no_std
+      - name: Setup `wasmtime`
+        if: "${{ matrix.os == 'ubuntu-latest' }}"
+        # Use the action provided by the Bytecode Alliance
+        uses: bytecodealliance/actions/wasmtime/setup@v1
+        with:
+          version: "40.0"
+
+      - name: Check compilation for no_std + WASI
+        if: "${{ matrix.os == 'ubuntu-latest' }}"
         run: |
-          cargo build --no-default-features --features=no_std
+          cargo build --target=wasm32-wasip2 --no-default-features --features=no_std
+
+      - name: Run tests for WASI
+        if: "${{ matrix.os == 'ubuntu-latest' }}"
+        run: |
+          cargo check --target=wasm32-wasip2
+          cargo test --target=wasm32-wasip2

dev.md

@@ -40,6 +40,12 @@ an env variable with the number of days as a result lifetime:
 WRITE_COMPARE_RESULT=1 RESULTS_LIFETIME=5 cargo bench -- Compare
 ```
 
+Run a specific benchmark in `quick` mode:
+
+```shell
+cargo bench --bench bench_resize -- --color=always --quick
+```
+
 # Wasm32
 
 Specify build target and runner in `.cargo/config.toml` file.
@@ -64,12 +70,6 @@ Run tests with saving result images as files in `./data` directory:
 CARGO_TARGET_WASM32_WASIP2_RUNNER="wasmtime --dir=. --env SAVE_RESULT=1 --" cargo test
 ```
 
-Run a specific benchmark in `quick` mode:
-
-```shell
-cargo bench --bench bench_resize -- --color=always --quick
-```
-
 Run benchmarks to compare with other crates for image resizing and write results into
 report files, such as `./benchmarks-wasm32.md`:
 

src/convolution/u8x1/wasm32.rs

@@ -1,5 +1,6 @@
 use core::arch::wasm32::*;
 
+use crate::compat::*;
 use crate::convolution::optimisations::Normalizer16;
 use crate::pixels::U8;
 use crate::{wasm32_utils, ImageView, ImageViewMut};

src/convolution/u8x3/wasm32.rs

@@ -1,5 +1,4 @@
 use core::arch::wasm32::*;
-use core::mem::transmute;
 
 use crate::convolution::optimisations::Normalizer16;
 use crate::pixels::U8x3;
@@ -153,7 +152,8 @@ unsafe fn horiz_convolution_four_rows(
 
         for i in 0..4 {
             let sss = i16x8_narrow_i32x4(sss_a[i], ZERO);
-            let pixel: u32 = transmute(i32x4_extract_lane::<0>(u8x16_narrow_i16x8(sss, ZERO)));
+            let pixel: u32 =
+                i32::cast_unsigned(i32x4_extract_lane::<0>(u8x16_narrow_i16x8(sss, ZERO)));
             let bytes = pixel.to_le_bytes();
             dst_rows[i].get_unchecked_mut(dst_x).0 = [bytes[0], bytes[1], bytes[2]];
         }
@@ -269,7 +269,7 @@ unsafe fn horiz_convolution_one_row(
         sss = i32x4_shr(sss, precision);
 
         sss = i16x8_narrow_i32x4(sss, sss);
-        let pixel: u32 = transmute(i32x4_extract_lane::<0>(u8x16_narrow_i16x8(sss, sss)));
+        let pixel: u32 = i32::cast_unsigned(i32x4_extract_lane::<0>(u8x16_narrow_i16x8(sss, sss)));
         let bytes = pixel.to_le_bytes();
         dst_row.get_unchecked_mut(dst_x).0 = [bytes[0], bytes[1], bytes[2]];
     }