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.github/workflows/build-libwebp.yml

@@ -0,0 +1,165 @@
+name: Build libwebp
+
+on:
+  push:
+    paths:
+      - '.github/workflows/build-libwebp.yml'
+  workflow_dispatch:
+    inputs:
+      libwebp_version:
+        description: 'libwebp version tag (e.g. v1.6.0)'
+        required: false
+        default: 'v1.6.0'
+
+env:
+  LIBWEBP_VERSION: ${{ inputs.libwebp_version || 'v1.6.0' }}
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: linux
+            artifact: libwebp.so
+          - os: windows-latest
+            target: windows
+            artifact: libwebp.dll
+          - os: macos-latest
+            target: macos
+            artifact: libwebp.dylib
+
+    name: ${{ matrix.target }}
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Clone libwebp
+        run: git clone --depth 1 --branch ${{ env.LIBWEBP_VERSION }} https://chromium.googlesource.com/webm/libwebp
+
+      - name: Patch out decoder
+        shell: bash
+        run: |
+          cd libwebp
+          sed -i.bak 's/\$<TARGET_OBJECTS:webpdecode>//' CMakeLists.txt
+          sed -i.bak 's/add_library(sharpyuv /add_library(sharpyuv STATIC /' CMakeLists.txt
+
+      - name: Create export lists
+        shell: bash
+        run: |
+          cat > libwebp-exports.txt <<'EOF'
+          { global: WebPEncodeLosslessBGRA; WebPFree; local: *; };
+          EOF
+          cat > libwebp-exports-macos.txt <<'EOF'
+          _WebPEncodeLosslessBGRA
+          _WebPFree
+          EOF
+          cat > libwebp-exports.def <<'EOF'
+          EXPORTS
+              WebPEncodeLosslessBGRA
+              WebPFree
+          EOF
+
+      - name: Build (Unix)
+        if: runner.os != 'Windows'
+        run: |
+          cd libwebp
+          mkdir build && cd build
+
+          if [ "${{ matrix.target }}" = "macos" ]; then
+            EXTRA_FLAGS="-DCMAKE_OSX_ARCHITECTURES=arm64 -DCMAKE_SHARED_LINKER_FLAGS=-Wl,-exported_symbols_list,${{ github.workspace }}/libwebp-exports-macos.txt,-dead_strip"
+          else
+            EXTRA_FLAGS="-DCMAKE_SHARED_LINKER_FLAGS=-Wl,--version-script=${{ github.workspace }}/libwebp-exports.txt,--gc-sections"
+          fi
+
+          cmake .. \
+            -DCMAKE_BUILD_TYPE=MinSizeRel \
+            -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON \
+            -DCMAKE_C_FLAGS="-ffunction-sections -fdata-sections -fvisibility=hidden -fno-asynchronous-unwind-tables" \
+            -DBUILD_SHARED_LIBS=ON \
+            -DWEBP_BUILD_ANIM_UTILS=OFF \
+            -DWEBP_BUILD_CWEBP=OFF \
+            -DWEBP_BUILD_DWEBP=OFF \
+            -DWEBP_BUILD_GIF2WEBP=OFF \
+            -DWEBP_BUILD_IMG2WEBP=OFF \
+            -DWEBP_BUILD_VWEBP=OFF \
+            -DWEBP_BUILD_WEBPINFO=OFF \
+            -DWEBP_BUILD_WEBPMUX=OFF \
+            -DWEBP_BUILD_EXTRAS=OFF \
+            $EXTRA_FLAGS
+          cmake --build . --target webp --config MinSizeRel
+          if [ "${{ matrix.target }}" = "macos" ]; then
+            strip -x libwebp.* 2>/dev/null || true
+          else
+            strip -s libwebp.* 2>/dev/null || true
+          fi
+
+      - name: Build (Windows)
+        if: runner.os == 'Windows'
+        run: |
+          cd libwebp
+          mkdir build && cd build
+          cmake .. `
+            -DCMAKE_BUILD_TYPE=MinSizeRel `
+            -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON `
+            -DCMAKE_C_FLAGS="/Gw /DWEBP_EXTERN=extern" `
+            -DBUILD_SHARED_LIBS=ON `
+            -DCMAKE_SHARED_LINKER_FLAGS="/DEF:${{ github.workspace }}/libwebp-exports.def /OPT:REF,ICF" `
+            -DWEBP_BUILD_ANIM_UTILS=OFF `
+            -DWEBP_BUILD_CWEBP=OFF `
+            -DWEBP_BUILD_DWEBP=OFF `
+            -DWEBP_BUILD_GIF2WEBP=OFF `
+            -DWEBP_BUILD_IMG2WEBP=OFF `
+            -DWEBP_BUILD_VWEBP=OFF `
+            -DWEBP_BUILD_WEBPINFO=OFF `
+            -DWEBP_BUILD_WEBPMUX=OFF `
+            -DWEBP_BUILD_EXTRAS=OFF
+          cmake --build . --target webp --config MinSizeRel
+
+      - name: Copy artifact
+        shell: bash
+        run: |
+          mkdir -p output
+          if [ "${{ matrix.target }}" = "windows" ]; then
+            cp libwebp/build/MinSizeRel/${{ matrix.artifact }} output/
+          else
+            cp libwebp/build/${{ matrix.artifact }} output/
+          fi
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: libwebp-${{ matrix.target }}
+          path: output/${{ matrix.artifact }}
+
+  commit:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Place natives
+        run: |
+          mkdir -p webp/src/main/resources/natives/{linux,windows,macos}
+          cp artifacts/libwebp-linux/libwebp.so webp/src/main/resources/natives/linux/
+          cp artifacts/libwebp-windows/libwebp.dll webp/src/main/resources/natives/windows/
+          cp artifacts/libwebp-macos/libwebp.dylib webp/src/main/resources/natives/macos/
+
+      - name: Commit
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add webp/src/main/resources/natives/
+          git diff --cached --quiet && echo "No changes" && exit 0
+          git commit -m "Update bundled libwebp ${{ env.LIBWEBP_VERSION }}"
+          git push

.github/workflows/test-webp.yml

@@ -2,12 +2,12 @@ name: Test WebP
 
 on:
   push:
-    branches:
-      - 'main'
     paths:
       - 'webp/**'
       - '.github/workflows/test-webp.yml'
-  pull_request:
+  workflow_run:
+    workflows: [Build libwebp]
+    types: [completed]
   workflow_dispatch:
 
 jobs:
@@ -25,13 +25,16 @@ jobs:
             name: Linux (NgEngine)
             install: sudo find /usr -name 'libwebp*.so*' -exec mv {} {}.disabled \;
             expected-decode: Java (ngengine)
+            expected-encode: libwebp (lossless-only)
           - os: macos-latest
             name: macOS (ImageIO)
             expected-decode: macOS ImageIO
+            expected-encode: libwebp (lossless-only)
           - os: windows-latest
             name: Windows (WIC)
             install: winget install --id 9PG2DK419DRG --accept-package-agreements --accept-source-agreements --source msstore --silent
             expected-decode: Windows WIC
+            expected-encode: libwebp (lossless-only)
 
     name: ${{ matrix.name }}
     runs-on: ${{ matrix.os }}

README.MD

@@ -45,14 +45,14 @@ repositories {
 
 dependencies {
     // Include only the modules you need:
-    implementation "org.redlance.platformtools:accent:4.1.1"
-    implementation "org.redlance.platformtools:referer:4.1.1"
-    implementation "org.redlance.platformtools:favorites:4.1.1"
-    implementation "org.redlance.platformtools:progress:4.1.1"
-    implementation "org.redlance.platformtools:webp:4.1.1"
+    implementation "org.redlance.platformtools:accent:4.2.0"
+    implementation "org.redlance.platformtools:referer:4.2.0"
+    implementation "org.redlance.platformtools:favorites:4.2.0"
+    implementation "org.redlance.platformtools:progress:4.2.0"
+    implementation "org.redlance.platformtools:webp:4.2.0"
 
     // For Java 8 (Downgraded version), add classifier:
-    // implementation("org.redlance.platformtools:accent:4.1.1:java8")
+    // implementation("org.redlance.platformtools:accent:4.2.0:java8")
 }
 ```
 
@@ -69,7 +69,7 @@ dependencies {
 <dependency>
     <groupId>org.redlance.platformtools</groupId>
     <artifactId>accent</artifactId>
-    <version>4.1.1</version>
+    <version>4.2.0</version>
 </dependency>
 ```
 
@@ -205,16 +205,27 @@ Decoder priority (first available wins):
 3. **Windows WIC** — Windows Imaging Component via FFM (decode only, requires WebP codec from MS Store)
 4. **ngengine** — pure-Java fallback ([image-webp-java](https://github.com/NostrGameEngine/image-webp-java), decode only, ~92 KB bundled)
 
-The `webp` module has two variants:
-- **Standard** (`webp`) — uses platform-native APIs or system-installed libwebp. Zero bundled dependencies.
-- **Bundled** (`webp` with classifier `bundled`) — includes a shaded and ProGuard-optimized [ngengine image-webp-java](https://github.com/NostrGameEngine/image-webp-java) decoder (~92 KB). Pixel-exact on all platforms without native libraries.
+Encoder priority:
+1. **libwebp** — system-installed native library (lossy + lossless)
+2. **libwebp (lossless-only)** — bundled native encoder (lossless only, included in standard and `bundled` variants)
+
+The `webp` module has three variants:
+
+| Variant | Classifier | Natives | ngengine | Use case |
+|---------|------------|---------|----------|----------|
+| **Standard** | — | bundled libwebp (lossless encoder) | — | Platform with native decoder (macOS/Windows) or system libwebp |
+| **Bundled** | `bundled` | bundled libwebp (lossless encoder) | shaded + ProGuard | Self-contained, works everywhere |
+| **Bundled Lite** | `bundled-lite` | — | shaded + ProGuard | Minimal size, no native binaries |
 
 ```groovy
-// Standard — requires platform support or libwebp on library path
-implementation "org.redlance.platformtools:webp:4.1.1"
+// Standard — bundled lossless encoder, requires platform decoder or system libwebp for decoding
+implementation "org.redlance.platformtools:webp:4.2.0"
+
+// Bundled — self-contained with ngengine decoder + bundled lossless encoder
+implementation "org.redlance.platformtools:webp:4.2.0:bundled"
 
-// Bundled — self-contained, works everywhere (decode only)
-implementation "org.redlance.platformtools:webp:4.1.1:bundled"
+// Bundled Lite — ngengine decoder only, no native binaries
+implementation "org.redlance.platformtools:webp:4.2.0:bundled-lite"
 ```
 
 ```java

build.gradle

@@ -14,7 +14,7 @@ plugins {
 
 allprojects {
     group = "org.redlance"
-    version = "4.1.1"
+    version = "4.2.0"
 
     repositories {
         mavenCentral()

renovate.json

@@ -2,5 +2,14 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:recommended"
+  ],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "fileMatch": ["\\.github/workflows/build-libwebp\\.yml$"],
+      "matchStrings": ["'(?<currentValue>v\\d+\\.\\d+\\.\\d+)'"],
+      "depNameTemplate": "webmproject/libwebp",
+      "datasourceTemplate": "github-tags"
+    }
   ]
 }

testing/src/main/java/org/redlance/platformtools/testing/TestingApp.java

@@ -4,6 +4,7 @@
 import org.redlance.platformtools.favorites.PlatformFinderFavorites;
 import org.redlance.platformtools.progress.PlatformProgressBars;
 import org.redlance.platformtools.referer.PlatformFileReferer;
+import org.redlance.platformtools.webp.WebPDiagnostics;
 import org.redlance.platformtools.webp.decoder.DecodedImage;
 import org.redlance.platformtools.webp.decoder.PlatformWebPDecoder;
 import org.redlance.platformtools.webp.encoder.PlatformWebPEncoder;
@@ -311,6 +312,10 @@ private void showWebPDialog() {
             }
 
             log.append("\n");
+            WebPDiagnostics.summary(s -> {
+                log.append(s);
+                log.append("\n");
+            });
         });
         buttons.add(probeBtn);
 

webp/build.gradle

@@ -70,7 +70,14 @@ tasks.register("proguardJar", ProGuardTask) {
     configuration(file("proguard.pro"))
 }
 
-assemble.dependsOn proguardJar
+tasks.register("bundledLiteJar", Jar) {
+    dependsOn proguardJar
+    from(zipTree(proguardJar.getOutJarFileCollection().singleFile))
+    exclude 'natives/**'
+    archiveClassifier.set("bundled-lite")
+}
+
+assemble.dependsOn proguardJar, bundledLiteJar
 downgradeJar.enabled = false
 
 shadow {
@@ -82,4 +89,8 @@ publishing.publications.named("mavenJava") {
         classifier = "bundled"
         builtBy(tasks.named("proguardJar"))
     }
+    artifact(tasks.named("bundledLiteJar")) {
+        classifier = "bundled-lite"
+        builtBy(tasks.named("bundledLiteJar"))
+    }
 }