HDR export: 10/12-bit AVIF & JPEG XL (BT.2020 PQ/HLG)

.github/workflows/build.yml

@@ -77,7 +77,13 @@ jobs:
             libssl-dev \
             libayatana-appindicator3-dev \
             librsvg2-dev \
-            patchelf
+            patchelf \
+            nasm
+
+      # nasm assembles rav1e's x86_64 AVIF asm (Apple Silicon uses the built-in assembler).
+      - name: Install additional system dependencies (macOS)
+        if: runner.os == 'macOS' && contains(inputs.target, 'x86_64')
+        run: brew install nasm
 
       # ------------- Android Setup -------------
       - name: Set up JDK

.github/workflows/ci.yml

@@ -46,7 +46,7 @@ jobs:
     with:
       platform: ${{ matrix.platform }}
       target: ${{ matrix.target }}
-      build-args: ${{ matrix.args }}
+      build-args: ${{ matrix.builds-args || matrix.args }}
       asset-prefix: ${{ matrix.asset-prefix }}
       mobile: ${{ matrix.mobile }}
     secrets: inherit

.github/workflows/lint.yml

@@ -68,8 +68,11 @@ jobs:
             libwebkit2gtk-4.1-dev \
             libssl-dev \
             libayatana-appindicator3-dev \
-            librsvg2-dev
+            librsvg2-dev \
+            nasm
 
       - name: Clippy
         working-directory: src-tauri
-        run: cargo clippy --all-targets --all-features -- -D warnings
+        # hdr_jxl links system libjxl (too old on the runners); `jpegxl-rs/docs` skips that link so
+        # clippy still type-checks the hdr_jxl module (plain --all-features would force the link).
+        run: cargo clippy --all-targets --features hdr_jxl,jpegxl-rs/docs -- -D warnings

.github/workflows/pr-ci.yml

@@ -44,6 +44,6 @@ jobs:
     with:
       platform: ${{ matrix.platform }}
       target: ${{ matrix.target }}
-      build-args: ${{ matrix.args }}
+      build-args: ${{ matrix.builds-args || matrix.args }}
       asset-prefix: ${{ matrix.asset-prefix }}
       mobile: ${{ matrix.mobile }}

.github/workflows/release.yml

@@ -46,7 +46,7 @@ jobs:
       release-id: ${{ github.event.release.id }}
       platform: ${{ matrix.platform }}
       target: ${{ matrix.target }}
-      build-args: ${{ matrix.args }}
+      build-args: ${{ matrix.builds-args || matrix.args }}
       asset-name-pattern: '[name]_v[version]_[platform]_[arch][ext]'
       asset-prefix: ${{ matrix.asset-prefix }}
       mobile: ${{ matrix.mobile }}

src-tauri/Cargo.toml

@@ -67,6 +67,26 @@ rgb = "0.8.53"
 imgref = "1.12.1"
 sysinfo = "0.39.3"
 
+# --- HDR export encoders ---
+# AVIF (PQ/HLG, 10/12-bit, CICP nclx): pure-Rust AV1 encoder + ISOBMFF muxer.
+# rav1e `asm` (added per-target below) is a build-time-only speedup; needs nasm on x86_64.
+rav1e = { version = "0.8.1", default-features = false, features = ["threading"] }
+avif-serialize = "0.8.9"
+# JPEG XL (PQ/HLG, >=10-bit float): bindings to system libjxl. Optional (see `hdr_jxl` feature)
+# because it requires libjxl (`brew install jpeg-xl`) at build+runtime. GPL-3.0-or-later bindings;
+# compatible with this repo's AGPL-3.0.
+jpegxl-rs = { version = "0.14.0", default-features = false, optional = true }
+jpegxl-sys = { version = "0.12.1", optional = true }
+
+[features]
+# Enable HDR JPEG XL export. Requires system libjxl (macOS: `brew install jpeg-xl`, with
+# PKG_CONFIG_PATH pointing at its keg-only pkgconfig dir). AVIF HDR export is always available.
+hdr_jxl = ["dep:jpegxl-rs", "dep:jpegxl-sys"]
+
+# Add asm on every target but aarch64-pc-windows-msvc (rav1e's ARM asm won't link under MSVC).
+[target.'cfg(not(all(target_arch = "aarch64", target_os = "windows")))'.dependencies]
+rav1e = { version = "0.8.1", default-features = false, features = ["asm"] }
+
 [target.'cfg(any(target_os = "windows", target_os = "macos", target_os = "linux"))'.dependencies]
 trash = "5.2.6"
 tauri-plugin-single-instance = "2.4.2"