Create Debug Workflow

.github/workflows/android.yml

@@ -0,0 +1,28 @@
+name: Android CI
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: set up JDK 21
+      uses: actions/setup-java@v4
+      with:
+        java-version: '21'
+        distribution: 'temurin'
+        cache: gradle
+
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    - name: Build with Gradle
+      run: ./gradlew build
+
+    - name: Upload a Debug APK
+      uses: actions/upload-artifact@v6.0.0
+      with:
+        path: app/build/outputs/apk/debug/*.apk

.vscode/settings.json

@@ -0,0 +1,15 @@
+{
+    "java.configuration.updateBuildConfiguration": "automatic",
+    "java.jdt.ls.java.home": "C:\\Program Files\\Android\\Android Studio\\jbr",
+    "java.configuration.runtimes": [
+        {
+            "name": "JavaSE-21",
+            "path": "C:\\Program Files\\Android\\Android Studio\\jbr",
+            "default": true
+        }
+    ],
+    "terminal.integrated.env.windows": {
+        "JAVA_HOME": "C:\\Program Files\\Android\\Android Studio\\jbr",
+        "PATH": "C:\\Program Files\\Android\\Android Studio\\jbr\\bin;${env:PATH}"
+    }
+}

app/CMakeLists.txt

@@ -22,7 +22,7 @@ add_compile_options(-fsigned-char)
 # Suppress all warnings
 add_definitions(-w)
 add_definitions(-DNDEBUG)
-add_definitions(-DSLIC3R_VERSION=${SLIC3R_VERSION})
+add_definitions(-DSLIC3R_VERSION="${SLIC3R_VERSION}")
 add_definitions(-DSLIC3R_BUILD_ID=${SLIC3R_BUILD_ID})
 
 set(jni_imports ${CMAKE_SOURCE_DIR}/src/main/jniImports)
@@ -40,10 +40,10 @@ elseif (${ANDROID_ABI} STREQUAL "x86")
     set(BOOST_ARCH "x32")
 endif()
 
-set(BOOST_LIBS atomic charconv chrono container context contract coroutine date_time exception fiber
+set(BOOST_LIBS atomic charconv chrono container contract date_time exception
         filesystem graph iostreams json log log_setup math_c99 math_c99f math_c99l math_tr1 math_tr1f
         math_tr1l nowide prg_exec_monitor program_options random regex serialization stacktrace_basic
-        stacktrace_noop system test_exec_moinotr thread timer type_erasure unit_test_framework url wave
+        stacktrace_noop system test_exec_monitor thread timer type_erasure unit_test_framework url wave
         wserialization)
 
 foreach (NAME IN LISTS BOOST_LIBS)
@@ -1320,12 +1320,9 @@ target_link_libraries(slic3r PRIVATE
         boost_charconv
         boost_chrono
         boost_container
-        boost_context
         boost_contract
-        boost_coroutine
         boost_date_time
         boost_exception
-        boost_fiber
         boost_filesystem
         boost_graph
         boost_iostreams

app/build.gradle

@@ -1,3 +1,6 @@
+import org.gradle.jvm.toolchain.JavaLanguageVersion
+import org.gradle.jvm.toolchain.JavaToolchainService
+
 plugins {
     id 'com.android.application'
 }
@@ -54,8 +57,8 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_21
+        targetCompatibility JavaVersion.VERSION_21
     }
 
     externalNativeBuild {
@@ -76,6 +79,13 @@ android {
     }
 }
 
+def javaToolchainService = extensions.getByType(JavaToolchainService)
+tasks.withType(JavaCompile).configureEach {
+    javaCompiler = javaToolchainService.compilerFor {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
 static String getGitCommitHash(File dir) {
     try {
         return Runtime.getRuntime().exec("git rev-parse HEAD", null, dir).inputStream.readLines().get(0).substring(0, 10)
@@ -100,4 +110,483 @@ dependencies {
     implementation 'com.google.android.material:material:1.12.0'
     implementation 'com.loopj.android:android-async-http:1.4.11'
     implementation 'androidx.activity:activity:1.10.1'
-}
+}
+
+def loadLocalProperties() {
+    def props = new Properties()
+    def propsFile = rootProject.file("local.properties")
+    if (propsFile.exists()) {
+        propsFile.withInputStream { props.load(it) }
+    }
+    return props
+}
+
+def toWslPath(String winPath) {
+    return winPath.replaceAll('^([A-Za-z]):') { m -> "/mnt/${m[1].toLowerCase()}" }.replace('\\', '/')
+}
+
+def localProps = loadLocalProperties()
+def sdkDir = localProps.getProperty("sdk.dir") ?: System.getenv("ANDROID_SDK_ROOT") ?: System.getenv("ANDROID_HOME")
+if (!sdkDir) {
+    throw new GradleException("Missing sdk.dir in local.properties and ANDROID_SDK_ROOT/ANDROID_HOME is not set")
+}
+def ndkDir = "${sdkDir}/ndk/${android.ndkVersion}"
+if (!file(ndkDir).exists()) {
+    throw new GradleException("NDK not found at ${ndkDir} (ndkVersion=${android.ndkVersion})")
+}
+def cmakeRoot = file("${sdkDir}/cmake")
+def cmakeDir = cmakeRoot.listFiles()?.findAll { it.isDirectory() }?.sort { a, b -> b.name <=> a.name }?.first()
+if (!cmakeDir) {
+    throw new GradleException("No CMake found under ${sdkDir}/cmake")
+}
+def cmakeExe = "${cmakeDir}/bin/cmake.exe"
+def ninjaExe = "${cmakeDir}/bin/ninja.exe"
+def toolchainFile = "${ndkDir}/build/cmake/android.toolchain.cmake"
+def wslExe = "${System.getenv("SystemRoot") ?: "C:/Windows"}/System32/wsl.exe"
+
+def tbbSrc = "${rootDir}/third_party/openvdb-android/tbb-aarch64"
+def tbbBuildArm64 = "${rootDir}/third_party/openvdb-android/build-tbb-android-21-arm64"
+def tbbInstallArm64 = "${rootDir}/third_party/openvdb-android/dist-android-21-arm64"
+def tbbBuildArmv7 = "${rootDir}/third_party/openvdb-android/build-tbb-android-21-armv7"
+def tbbInstallArmv7 = "${rootDir}/third_party/openvdb-android/dist-android-21-armv7"
+
+def occtSrc = "${rootDir}/third_party/occt"
+def occtBuildArm64 = "${rootDir}/third_party/occt/build-android-arm64-v8a"
+def occtDistArm64 = "${rootDir}/third_party/occt/dist/android-arm64-v8a"
+def occtBuildArmv7 = "${rootDir}/third_party/occt/build-android-armeabi-v7a"
+def occtDistArmv7 = "${rootDir}/third_party/occt/dist/android-armeabi-v7a"
+
+def boostDir = "${rootDir}/third_party/Boost-for-Android"
+def boostOutArm64 = "${boostDir}/build/out/arm64-v8a"
+def boostOutArmv7 = "${boostDir}/build/out/armeabi-v7a"
+
+tasks.register("ensureThirdParty") {
+    doLast {
+        def thirdPartyDir = file("${rootDir}/third_party")
+        if (!thirdPartyDir.exists()) {
+            thirdPartyDir.mkdirs()
+        }
+        def repos = [
+                [path: "${rootDir}/third_party/Boost-for-Android", url: "https://github.com/moritz-wundke/Boost-for-Android.git"],
+                [path: "${rootDir}/third_party/openvdb-android", url: "https://github.com/syoyo/openvdb-android.git"],
+                [path: "${rootDir}/third_party/occt", url: "https://github.com/Open-Cascade-SAS/OCCT.git"]
+        ]
+        repos.each { repo ->
+            if (!file(repo.path).exists()) {
+                exec {
+                    workingDir rootDir
+                    commandLine "git", "clone", "--depth", "1", repo.url, repo.path
+                }
+            }
+        }
+        def vdbRoot = file("${rootDir}/third_party/openvdb-android")
+        if (file("${vdbRoot}/.gitmodules").exists() && !file("${vdbRoot}/tbb-aarch64/CMakeLists.txt").exists()) {
+            exec {
+                workingDir vdbRoot
+                commandLine "git", "submodule", "update", "--init", "--recursive"
+            }
+        }
+    }
+}
+
+tasks.register("patchBoostForAndroid") {
+    dependsOn("ensureThirdParty")
+    doLast {
+        def scriptFile = file("${boostDir}/build-android.sh")
+        if (scriptFile.exists()) {
+            def scriptText = scriptFile.getText("UTF-8")
+            def changed = false
+
+            if (!scriptText.contains("FORCE_PLATFORM_OS")) {
+                def marker = "# Check platform patch"
+                def markerIdx = scriptText.indexOf(marker)
+                if (markerIdx >= 0) {
+                    def esacIdx = scriptText.indexOf("esac", markerIdx)
+                    if (esacIdx >= 0) {
+                        def insertPos = scriptText.indexOf("\n", esacIdx)
+                        if (insertPos >= 0) {
+                            insertPos += 1
+                            def insert = 'if [ -n "${FORCE_PLATFORM_OS}" ]; then\n' +
+                                    '    PlatformOS="${FORCE_PLATFORM_OS}"\n' +
+                                    'fi\n\n'
+                            scriptText = scriptText.substring(0, insertPos) + insert + scriptText.substring(insertPos)
+                            changed = true
+                        }
+                    }
+                }
+            }
+
+            if (!scriptText.contains("CXXPATH.exe")) {
+                def marker = 'if [ -n "${AndroidSourcesDetected}"'
+                if (scriptText.contains(marker)) {
+                    def insert = 'if [ ! -f "$CXXPATH" ] && [ -f "$CXXPATH.exe" ]; then\n' +
+                            '    CXXPATH="$CXXPATH.exe"\n' +
+                            'fi\n\n'
+                    scriptText = scriptText.replace(marker, insert + marker)
+                    changed = true
+                }
+            }
+
+            if (changed) {
+                scriptFile.write(scriptText, "UTF-8")
+            }
+        }
+
+        def commonFile = file("${boostDir}/configs/user-config-ndk23-1_85_0-common.jam")
+        if (commonFile.exists()) {
+            def commonText = commonFile.getText("UTF-8")
+            def commonChanged = false
+            if (!commonText.contains("AndroidToolSuffix")) {
+                def header = 'import os ;\n' +
+                        'local AndroidToolSuffix = [ os.environ AndroidToolSuffix ] ;\n' +
+                        'if ! $(AndroidToolSuffix) { AndroidToolSuffix = "" ; }\n\n'
+                commonText = header + commonText.trim() + "\n"
+                commonChanged = true
+            }
+            if (!commonText.contains('llvm-ar$(AndroidToolSuffix)')) {
+                commonText = commonText.replace('<archiver>$(AndroidBinariesPath)/llvm-ar', '<archiver>$(AndroidBinariesPath)/llvm-ar$(AndroidToolSuffix)')
+                commonChanged = true
+            }
+            if (!commonText.contains('llvm-ranlib$(AndroidToolSuffix)')) {
+                commonText = commonText.replace('<ranlib>$(AndroidBinariesPath)/llvm-ranlib', '<ranlib>$(AndroidBinariesPath)/llvm-ranlib$(AndroidToolSuffix)')
+                commonChanged = true
+            }
+            if (commonChanged) {
+                commonFile.write(commonText, "UTF-8")
+            }
+        }
+
+        def arm64File = file("${boostDir}/configs/user-config-ndk23-1_85_0-arm64-v8a.jam")
+        if (arm64File.exists()) {
+            def text = arm64File.getText("UTF-8")
+            if (!text.contains("<arch>")) {
+                text = "<arch>arm\n<address-model>64\n<binary-format>elf\n<abi>aapcs\n" + text
+                arm64File.write(text, "UTF-8")
+            }
+        }
+
+        def armv7File = file("${boostDir}/configs/user-config-ndk23-1_85_0-armeabi-v7a.jam")
+        if (armv7File.exists()) {
+            def text = armv7File.getText("UTF-8")
+            if (!text.contains("<arch>")) {
+                text = "<arch>arm\n<address-model>32\n<binary-format>elf\n<abi>aapcs\n" + text
+                armv7File.write(text, "UTF-8")
+            }
+        }
+    }
+}
+
+tasks.register("buildTbbArm64") {
+    dependsOn("ensureThirdParty")
+    onlyIf {
+        !file("${projectDir}/src/main/jniImports/oneTBB/lib/arm64-v8a/libtbb.a").exists() ||
+                !file("${projectDir}/src/main/jniImports/oneTBB/lib/arm64-v8a/libtbbmalloc.a").exists() ||
+                !file("${projectDir}/src/main/jniLibs/arm64-v8a/libtbb.so").exists() ||
+                !file("${projectDir}/src/main/jniLibs/arm64-v8a/libtbbmalloc.so").exists()
+    }
+    doLast {
+        exec {
+            commandLine cmakeExe, "-G", "Ninja",
+                    "-S", tbbSrc,
+                    "-B", tbbBuildArm64,
+                    "-DCMAKE_MAKE_PROGRAM=${ninjaExe}",
+                    "-DCMAKE_TOOLCHAIN_FILE=${toolchainFile}",
+                    "-DANDROID_ABI=arm64-v8a",
+                    "-DANDROID_PLATFORM=android-21",
+                    "-DANDROID_STL=c++_shared",
+                    "-DCMAKE_BUILD_TYPE=Release",
+                    "-DCMAKE_INSTALL_PREFIX=${tbbInstallArm64}",
+                    "-DTBB_BUILD_TESTS=Off"
+        }
+        exec {
+            commandLine cmakeExe, "--build", tbbBuildArm64, "--target", "install"
+        }
+    }
+}
+
+tasks.register("buildTbbArmv7") {
+    dependsOn("ensureThirdParty")
+    onlyIf {
+        !file("${projectDir}/src/main/jniImports/oneTBB/lib/armeabi-v7a/libtbb.a").exists() ||
+                !file("${projectDir}/src/main/jniImports/oneTBB/lib/armeabi-v7a/libtbbmalloc.a").exists() ||
+                !file("${projectDir}/src/main/jniLibs/armeabi-v7a/libtbb.so").exists() ||
+                !file("${projectDir}/src/main/jniLibs/armeabi-v7a/libtbbmalloc.so").exists()
+    }
+    doLast {
+        exec {
+            commandLine cmakeExe, "-G", "Ninja",
+                    "-S", tbbSrc,
+                    "-B", tbbBuildArmv7,
+                    "-DCMAKE_MAKE_PROGRAM=${ninjaExe}",
+                    "-DCMAKE_TOOLCHAIN_FILE=${toolchainFile}",
+                    "-DANDROID_ABI=armeabi-v7a",
+                    "-DANDROID_PLATFORM=android-21",
+                    "-DANDROID_STL=c++_shared",
+                    "-DCMAKE_BUILD_TYPE=Release",
+                    "-DCMAKE_INSTALL_PREFIX=${tbbInstallArmv7}",
+                    "-DTBB_BUILD_TESTS=Off"
+        }
+        exec {
+            commandLine cmakeExe, "--build", tbbBuildArmv7, "--target", "install"
+        }
+    }
+}
+
+tasks.register("copyTbbArm64", Copy) {
+    dependsOn("buildTbbArm64")
+    onlyIf {
+        !file("${projectDir}/src/main/jniImports/oneTBB/lib/arm64-v8a/libtbb.a").exists() ||
+                !file("${projectDir}/src/main/jniImports/oneTBB/lib/arm64-v8a/libtbbmalloc.a").exists() ||
+                !file("${projectDir}/src/main/jniLibs/arm64-v8a/libtbb.so").exists() ||
+                !file("${projectDir}/src/main/jniLibs/arm64-v8a/libtbbmalloc.so").exists()
+    }
+    from("${tbbInstallArm64}/lib") {
+        include "libtbb_static.a"
+        include "libtbbmalloc_static.a"
+        include "libtbb.so"
+        include "libtbbmalloc.so"
+    }
+    into("${projectDir}/src/main/jniImports/oneTBB/tmp-arm64")
+    doLast {
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-arm64/libtbb_static.a"
+            into "${projectDir}/src/main/jniImports/oneTBB/lib/arm64-v8a"
+            rename { "libtbb.a" }
+        }
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-arm64/libtbbmalloc_static.a"
+            into "${projectDir}/src/main/jniImports/oneTBB/lib/arm64-v8a"
+            rename { "libtbbmalloc.a" }
+        }
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-arm64/libtbb.so"
+            into "${projectDir}/src/main/jniLibs/arm64-v8a"
+        }
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-arm64/libtbbmalloc.so"
+            into "${projectDir}/src/main/jniLibs/arm64-v8a"
+        }
+        delete("${projectDir}/src/main/jniImports/oneTBB/tmp-arm64")
+    }
+}
+
+tasks.register("copyTbbArmv7", Copy) {
+    dependsOn("buildTbbArmv7")
+    onlyIf {
+        !file("${projectDir}/src/main/jniImports/oneTBB/lib/armeabi-v7a/libtbb.a").exists() ||
+                !file("${projectDir}/src/main/jniImports/oneTBB/lib/armeabi-v7a/libtbbmalloc.a").exists() ||
+                !file("${projectDir}/src/main/jniLibs/armeabi-v7a/libtbb.so").exists() ||
+                !file("${projectDir}/src/main/jniLibs/armeabi-v7a/libtbbmalloc.so").exists()
+    }
+    from("${tbbInstallArmv7}/lib") {
+        include "libtbb_static.a"
+        include "libtbbmalloc_static.a"
+        include "libtbb.so"
+        include "libtbbmalloc.so"
+    }
+    into("${projectDir}/src/main/jniImports/oneTBB/tmp-armv7")
+    doLast {
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-armv7/libtbb_static.a"
+            into "${projectDir}/src/main/jniImports/oneTBB/lib/armeabi-v7a"
+            rename { "libtbb.a" }
+        }
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-armv7/libtbbmalloc_static.a"
+            into "${projectDir}/src/main/jniImports/oneTBB/lib/armeabi-v7a"
+            rename { "libtbbmalloc.a" }
+        }
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-armv7/libtbb.so"
+            into "${projectDir}/src/main/jniLibs/armeabi-v7a"
+        }
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/tmp-armv7/libtbbmalloc.so"
+            into "${projectDir}/src/main/jniLibs/armeabi-v7a"
+        }
+        delete("${projectDir}/src/main/jniImports/oneTBB/tmp-armv7")
+    }
+}
+
+tasks.register("copyTbbHeaders") {
+    dependsOn("buildTbbArm64")
+    onlyIf { !file("${projectDir}/src/main/jniImports/oneTBB/include/tbb/tbb.h").exists() }
+    doLast {
+        copy {
+            from "${tbbInstallArm64}/include/tbb"
+            into "${projectDir}/src/main/jniImports/oneTBB/include/tbb"
+        }
+        copy {
+            from "${projectDir}/src/main/jniImports/oneTBB/include/tbb"
+            into "${projectDir}/src/main/jniImports/oneTBB/include/oneapi/tbb"
+        }
+    }
+}
+
+tasks.register("buildBoostArm64") {
+    dependsOn("patchBoostForAndroid")
+    onlyIf { !file("${projectDir}/src/main/jniImports/boost/lib/arm64-v8a/lib/libboost_atomic-clang-mt-a64-1_85.a").exists() }
+    doLast {
+        if (!file(wslExe).exists()) {
+            throw new GradleException("WSL is required to build Boost. Install WSL or provide prebuilt Boost libs.")
+        }
+        def ndkWsl = toWslPath(ndkDir)
+        def boostWsl = toWslPath(boostDir)
+        def binWsl = toWslPath("${ndkDir}/toolchains/llvm/prebuilt/windows-x86_64/bin")
+        exec {
+            commandLine wslExe, "bash", "-lc", "set -euo pipefail; cd ${boostWsl}; chmod +x ${binWsl}/aarch64-linux-android21-clang++ ${binWsl}/llvm-ar.exe ${binWsl}/llvm-ranlib.exe || true; FORCE_PLATFORM_OS=windows AndroidCompilerSuffix= AndroidToolSuffix=.exe ./build-android.sh ${ndkWsl} --boost=1.85.0 --arch=arm64-v8a --target-version=21 --without-libraries=context,coroutine,fiber,python"
+        }
+    }
+}
+
+tasks.register("buildBoostArmv7") {
+    dependsOn("patchBoostForAndroid")
+    onlyIf { !file("${projectDir}/src/main/jniImports/boost/lib/armeabi-v7a/lib/libboost_atomic-clang-mt-a32-1_85.a").exists() }
+    doLast {
+        if (!file(wslExe).exists()) {
+            throw new GradleException("WSL is required to build Boost. Install WSL or provide prebuilt Boost libs.")
+        }
+        def ndkWsl = toWslPath(ndkDir)
+        def boostWsl = toWslPath(boostDir)
+        def binWsl = toWslPath("${ndkDir}/toolchains/llvm/prebuilt/windows-x86_64/bin")
+        exec {
+            commandLine wslExe, "bash", "-lc", "set -euo pipefail; cd ${boostWsl}; chmod +x ${binWsl}/armv7a-linux-androideabi21-clang++ ${binWsl}/llvm-ar.exe ${binWsl}/llvm-ranlib.exe || true; FORCE_PLATFORM_OS=windows AndroidCompilerSuffix= AndroidToolSuffix=.exe ./build-android.sh ${ndkWsl} --boost=1.85.0 --arch=armeabi-v7a --target-version=21 --without-libraries=context,coroutine,fiber,python"
+        }
+    }
+}
+
+tasks.register("copyBoostArm64", Copy) {
+    dependsOn("buildBoostArm64")
+    onlyIf { !file("${projectDir}/src/main/jniImports/boost/lib/arm64-v8a/lib/libboost_atomic-clang-mt-a64-1_85.a").exists() }
+    from("${boostOutArm64}/lib") {
+        include "libboost_*.a"
+    }
+    into("${projectDir}/src/main/jniImports/boost/lib/arm64-v8a/lib")
+}
+
+tasks.register("copyBoostArmv7", Copy) {
+    dependsOn("buildBoostArmv7")
+    onlyIf { !file("${projectDir}/src/main/jniImports/boost/lib/armeabi-v7a/lib/libboost_atomic-clang-mt-a32-1_85.a").exists() }
+    from("${boostOutArmv7}/lib") {
+        include "libboost_*.a"
+    }
+    into("${projectDir}/src/main/jniImports/boost/lib/armeabi-v7a/lib")
+}
+
+tasks.register("copyBoostHeaders", Copy) {
+    dependsOn("ensureThirdParty")
+    onlyIf { !file("${projectDir}/src/main/jniImports/boost/include/boost/variant.hpp").exists() }
+    from("${boostDir}/boost_1_85_0/boost")
+    into("${projectDir}/src/main/jniImports/boost/include/boost")
+}
+
+tasks.register("buildOcctArm64") {
+    dependsOn("ensureThirdParty")
+    onlyIf { !file("${projectDir}/src/main/occt/jniLibs/arm64-v8a/libTKDESTEP.so").exists() }
+    doLast {
+        exec {
+            commandLine cmakeExe, "-G", "Ninja",
+                    "-S", occtSrc,
+                    "-B", occtBuildArm64,
+                    "-DCMAKE_MAKE_PROGRAM=${ninjaExe}",
+                    "-DCMAKE_TOOLCHAIN_FILE=${toolchainFile}",
+                    "-DANDROID_ABI=arm64-v8a",
+                    "-DANDROID_PLATFORM=android-21",
+                    "-DCMAKE_BUILD_TYPE=Release",
+                    "-DBUILD_LIBRARY_TYPE=Shared",
+                    "-DINSTALL_DIR_LIB=libs/arm64-v8a",
+                    "-DINSTALL_DIR_INCLUDE=inc",
+                    "-DBUILD_DOC_Overview=OFF",
+                    "-DBUILD_DOC_RefMan=OFF",
+                    "-DUSE_FREETYPE=OFF",
+                    "-DUSE_RAPIDJSON=OFF",
+                    "-DUSE_DRACO=OFF",
+                    "-DCMAKE_INSTALL_PREFIX=${occtDistArm64}"
+        }
+        exec {
+            commandLine cmakeExe, "--build", occtBuildArm64, "--target", "install", "--config", "Release", "--", "-j2"
+        }
+    }
+}
+
+tasks.register("buildOcctArmv7") {
+    dependsOn("ensureThirdParty")
+    onlyIf { !file("${projectDir}/src/main/occt/jniLibs/armeabi-v7a/libTKDESTEP.so").exists() }
+    doLast {
+        exec {
+            commandLine cmakeExe, "-G", "Ninja",
+                    "-S", occtSrc,
+                    "-B", occtBuildArmv7,
+                    "-DCMAKE_MAKE_PROGRAM=${ninjaExe}",
+                    "-DCMAKE_TOOLCHAIN_FILE=${toolchainFile}",
+                    "-DANDROID_ABI=armeabi-v7a",
+                    "-DANDROID_PLATFORM=android-21",
+                    "-DCMAKE_BUILD_TYPE=Release",
+                    "-DBUILD_LIBRARY_TYPE=Shared",
+                    "-DINSTALL_DIR_LIB=libs/armeabi-v7a",
+                    "-DINSTALL_DIR_INCLUDE=inc",
+                    "-DBUILD_DOC_Overview=OFF",
+                    "-DBUILD_DOC_RefMan=OFF",
+                    "-DUSE_FREETYPE=OFF",
+                    "-DUSE_RAPIDJSON=OFF",
+                    "-DUSE_DRACO=OFF",
+                    "-DCMAKE_INSTALL_PREFIX=${occtDistArmv7}"
+        }
+        exec {
+            commandLine cmakeExe, "--build", occtBuildArmv7, "--target", "install", "--config", "Release", "--", "-j2"
+        }
+    }
+}
+
+tasks.register("copyOcctArm64", Copy) {
+    dependsOn("buildOcctArm64")
+    onlyIf { !file("${projectDir}/src/main/occt/jniLibs/arm64-v8a/libTKDESTEP.so").exists() }
+    from("${occtDistArm64}/libs/arm64-v8a") {
+        include "*.so"
+    }
+    into("${projectDir}/src/main/occt/jniLibs/arm64-v8a")
+}
+
+tasks.register("copyOcctArmv7", Copy) {
+    dependsOn("buildOcctArmv7")
+    onlyIf { !file("${projectDir}/src/main/occt/jniLibs/armeabi-v7a/libTKDESTEP.so").exists() }
+    from("${occtDistArmv7}/libs/armeabi-v7a") {
+        include "*.so"
+    }
+    into("${projectDir}/src/main/occt/jniLibs/armeabi-v7a")
+}
+
+tasks.register("copyOcctHeadersArm64", Copy) {
+    dependsOn("buildOcctArm64")
+    onlyIf { !file("${projectDir}/src/main/occt/include/arm64-v8a/STEPCAFControl_Reader.hxx").exists() }
+    from("${occtDistArm64}/inc")
+    into("${projectDir}/src/main/occt/include/arm64-v8a")
+}
+
+tasks.register("copyOcctHeadersArmv7", Copy) {
+    dependsOn("buildOcctArmv7")
+    onlyIf { !file("${projectDir}/src/main/occt/include/armeabi-v7a/STEPCAFControl_Reader.hxx").exists() }
+    from("${occtDistArmv7}/inc")
+    into("${projectDir}/src/main/occt/include/armeabi-v7a")
+}
+
+tasks.register("prepareNativeDeps") {
+    dependsOn(
+            "copyTbbArm64",
+            "copyTbbArmv7",
+            "copyTbbHeaders",
+            "copyBoostArm64",
+            "copyBoostArmv7",
+            "copyBoostHeaders",
+            "copyOcctArm64",
+            "copyOcctArmv7",
+            "copyOcctHeadersArm64",
+            "copyOcctHeadersArmv7"
+    )
+}
+
+afterEvaluate {
+    tasks.matching { it.name.startsWith("buildCMake") }.configureEach {
+        dependsOn("prepareNativeDeps")
+    }
+}

app/src/main/java/ru/ytkab0bp/slicebeam/SliceBeam.java

@@ -101,13 +101,26 @@ public class SliceBeam extends Application {
 
     public static ConfigObject buildCurrentConfigObject() {
         ConfigObject singleObject = new ConfigObject();
-        singleObject.values.putAll(SliceBeam.CONFIG.findPrinter(SliceBeam.CONFIG.presets.get("printer")).values);
-        if (SliceBeam.CONFIG.findPrint(SliceBeam.CONFIG.presets.get("print")) != null) {
-            singleObject.values.putAll(SliceBeam.CONFIG.findPrint(SliceBeam.CONFIG.presets.get("print")).values);
+        ConfigObject printerConfig = SliceBeam.CONFIG.findPrinter(SliceBeam.CONFIG.presets.get("printer"));
+        if (printerConfig != null) {
+            singleObject.values.putAll(printerConfig.values);
+        }
+        ConfigObject printConfig = SliceBeam.CONFIG.findPrint(SliceBeam.CONFIG.presets.get("print"));
+        if (printConfig != null) {
+            for (Map.Entry<String, String> en : printConfig.values.entrySet()) {
+                if (!Slic3rConfigWrapper.PRINTER_CONFIG_KEYS.contains(en.getKey())) {
+                    singleObject.values.put(en.getKey(), en.getValue());
+                }
+            }
         }
         // TODO: MMU. Detect by printerConfig#getExtruderCount()
-        if (SliceBeam.CONFIG.findFilament(SliceBeam.CONFIG.presets.get("filament")) != null) {
-            singleObject.values.putAll(SliceBeam.CONFIG.findFilament(SliceBeam.CONFIG.presets.get("filament")).values);
+        ConfigObject filamentConfig = SliceBeam.CONFIG.findFilament(SliceBeam.CONFIG.presets.get("filament"));
+        if (filamentConfig != null) {
+            for (Map.Entry<String, String> en : filamentConfig.values.entrySet()) {
+                if (!Slic3rConfigWrapper.PRINTER_CONFIG_KEYS.contains(en.getKey())) {
+                    singleObject.values.put(en.getKey(), en.getValue());
+                }
+            }
         }
 
         PrintConfigDef def = PrintConfigDef.getInstance();
@@ -121,12 +134,10 @@ public class SliceBeam extends Application {
 
     public static void genCurrentConfig() throws IOException {
         File cfg = getCurrentConfigFile();
-        if (!cfg.exists()) {
-            FileOutputStream fos = new FileOutputStream(cfg);
-            ConfigObject singleObject = buildCurrentConfigObject();
-            fos.write(singleObject.serialize().getBytes(StandardCharsets.UTF_8));
-            fos.close();
-        }
+        FileOutputStream fos = new FileOutputStream(cfg);
+        ConfigObject singleObject = buildCurrentConfigObject();
+        fos.write(singleObject.serialize().getBytes(StandardCharsets.UTF_8));
+        fos.close();
     }
 
     public static File getCurrentConfigFile() {

app/src/main/java/ru/ytkab0bp/slicebeam/fragment/BedFragment.java

@@ -51,6 +51,7 @@ import ru.ytkab0bp.slicebeam.events.SlicingProgressEvent;
 import ru.ytkab0bp.slicebeam.navigation.Fragment;
 import ru.ytkab0bp.slicebeam.slic3r.Bed3D;
 import ru.ytkab0bp.slicebeam.slic3r.GCodeProcessorResult;
+import ru.ytkab0bp.slicebeam.slic3r.GCodeThumbnailer;
 import ru.ytkab0bp.slicebeam.slic3r.Model;
 import ru.ytkab0bp.slicebeam.slic3r.Slic3rRuntimeError;
 import ru.ytkab0bp.slicebeam.theme.ThemesRepo;
@@ -412,12 +413,14 @@ public class BedFragment extends Fragment {
                                 });
                             }
 
-                            if (!DEBUG_VIEWER) {
-                                gCodeResult = glView.getRenderer().getModel().slice(cfg.getAbsolutePath(), gcode.getAbsolutePath(), (progress, text) -> SliceBeam.EVENT_BUS.fireEvent(new SlicingProgressEvent(progress, text)));
-                                SliceBeam.EVENT_BUS.fireEvent(new SlicingProgressEvent(100, ""));
-                            } else {
-                                gCodeResult = new GCodeProcessorResult(gcode);
-                            }
+                              if (!DEBUG_VIEWER) {
+                                  gCodeResult = glView.getRenderer().getModel().slice(cfg.getAbsolutePath(), gcode.getAbsolutePath(), (progress, text) -> SliceBeam.EVENT_BUS.fireEvent(new SlicingProgressEvent(progress, text)));
+                                  GCodeThumbnailer.addThumbnailsToGcode(gcode, SliceBeam.buildCurrentConfigObject(), glView);
+                                  SliceBeam.EVENT_BUS.fireEvent(new SlicingProgressEvent(100, ""));
+                              } else {
+                                  gCodeResult = new GCodeProcessorResult(gcode);
+                                  GCodeThumbnailer.addThumbnailsToGcode(gcode, SliceBeam.buildCurrentConfigObject(), glView);
+                              }
                             ViewUtils.postOnMainThread(()-> {
                                 glView.queueEvent(()->{
                                     glView.getRenderer().setGCodeViewer(gCodeResult);

app/src/main/java/ru/ytkab0bp/slicebeam/fragment/PrinterConfigFragment.java

@@ -45,8 +45,7 @@ public class PrinterConfigFragment extends ProfileListFragment {
 
                 new OptionElement(new SubHeader("Firmware")),
                 new OptionElement(def.options.get("gcode_flavor")),
-                // TODO: Thumbnails are not working *yet*
-//                new OptionElement(def.options.get("thumbnails")),
+                new OptionElement(def.options.get("thumbnails")),
                 new OptionElement(def.options.get("silent_mode")),
                 new OptionElement(def.options.get("remaining_times")),
                 new OptionElement(def.options.get("binary_gcode")),

app/src/main/java/ru/ytkab0bp/slicebeam/render/GLRenderer.java

@@ -3,6 +3,7 @@ package ru.ytkab0bp.slicebeam.render;
 import static android.opengl.GLES30.*;
 import static ru.ytkab0bp.slicebeam.utils.DebugUtils.assertTrue;
 
+import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.opengl.GLSurfaceView;
 import android.util.Log;
@@ -12,6 +13,8 @@ import androidx.core.graphics.ColorUtils;
 import java.util.ArrayList;
 import java.util.List;
 
+import java.nio.IntBuffer;
+
 import javax.microedition.khronos.egl.EGLConfig;
 import javax.microedition.khronos.opengles.GL10;
 
@@ -51,6 +54,7 @@ public class GLRenderer implements GLSurfaceView.Renderer {
 
     // Instance values, should be released
     private Bed3D bed;
+    private boolean bedVisible = true;
     private int lastConfigUid;
     private GLShadersManager shadersManager;
     private GLModel backgroundModel;
@@ -77,6 +81,7 @@ public class GLRenderer implements GLSurfaceView.Renderer {
     private Vec3d bbMin = new Vec3d(), bbMax = new Vec3d();
     private boolean isInFlattenMode;
     private ArrayList<GLModel> flattenPlanes = new ArrayList<>();
+    private static final double TOP_VIEW_MARGIN = 1.1;
 
     public Camera getCamera() {
         return camera;
@@ -86,6 +91,204 @@ public class GLRenderer implements GLSurfaceView.Renderer {
         return bed;
     }
 
+    public void setBedVisible(boolean visible) {
+        bedVisible = visible;
+    }
+
+    public boolean isBedVisible() {
+        return bedVisible;
+    }
+
+    public Bitmap renderToBitmap(int width, int height, boolean hideBed) {
+        return renderToBitmap(width, height, hideBed, false);
+    }
+
+    public Bitmap renderToBitmap(int width, int height, boolean hideBed, boolean topView) {
+        if (width <= 0 || height <= 0) {
+            return null;
+        }
+
+        int[] fbo = new int[1];
+        int[] texture = new int[1];
+        int[] depth = new int[1];
+        int[] fboMsaa = new int[1];
+        int[] colorMsaa = new int[1];
+        int[] depthMsaa = new int[1];
+
+        glGenFramebuffers(1, fbo, 0);
+        glGenTextures(1, texture, 0);
+        glGenRenderbuffers(1, depth, 0);
+
+        glBindTexture(GL_TEXTURE_2D, texture[0]);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, null);
+
+        glBindRenderbuffer(GL_RENDERBUFFER, depth[0]);
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height);
+
+        glBindFramebuffer(GL_FRAMEBUFFER, fbo[0]);
+        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[0], 0);
+        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth[0]);
+
+        if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+            glBindFramebuffer(GL_FRAMEBUFFER, 0);
+            glDeleteRenderbuffers(1, depth, 0);
+            glDeleteTextures(1, texture, 0);
+            glDeleteFramebuffers(1, fbo, 0);
+            return null;
+        }
+
+        boolean useMsaa = true;
+        if (useMsaa) {
+            glGenFramebuffers(1, fboMsaa, 0);
+            glGenRenderbuffers(1, colorMsaa, 0);
+            glGenRenderbuffers(1, depthMsaa, 0);
+
+            glBindRenderbuffer(GL_RENDERBUFFER, colorMsaa[0]);
+            glRenderbufferStorageMultisample(GL_RENDERBUFFER, 4, GL_RGBA8, width, height);
+
+            glBindRenderbuffer(GL_RENDERBUFFER, depthMsaa[0]);
+            glRenderbufferStorageMultisample(GL_RENDERBUFFER, 4, GL_DEPTH_COMPONENT16, width, height);
+
+            glBindFramebuffer(GL_FRAMEBUFFER, fboMsaa[0]);
+            glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorMsaa[0]);
+            glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthMsaa[0]);
+
+            if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+                useMsaa = false;
+                glBindFramebuffer(GL_FRAMEBUFFER, 0);
+                glDeleteRenderbuffers(1, depthMsaa, 0);
+                glDeleteRenderbuffers(1, colorMsaa, 0);
+                glDeleteFramebuffers(1, fboMsaa, 0);
+            }
+        }
+
+        int prevWidth = viewportWidth;
+        int prevHeight = viewportHeight;
+        boolean prevBed = bedVisible;
+        CameraState prevCamera = null;
+
+        viewportWidth = width;
+        viewportHeight = height;
+        if (useMsaa) {
+            glBindFramebuffer(GL_FRAMEBUFFER, fboMsaa[0]);
+        } else {
+            glBindFramebuffer(GL_FRAMEBUFFER, fbo[0]);
+        }
+        glViewport(0, 0, width, height);
+        bedVisible = !hideBed;
+        if (topView) {
+            prevCamera = applyTopViewCamera();
+        }
+        updateProjection();
+
+        onDrawFrame(null);
+
+        if (useMsaa) {
+            glBindFramebuffer(GL_READ_FRAMEBUFFER, fboMsaa[0]);
+            glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo[0]);
+            glBlitFramebuffer(0, 0, width, height, 0, 0, width, height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
+            glBindFramebuffer(GL_FRAMEBUFFER, fbo[0]);
+        }
+
+        Bitmap bitmap = readPixelsToBitmap(width, height);
+
+        if (prevCamera != null) {
+            restoreCamera(prevCamera);
+        }
+        bedVisible = prevBed;
+        viewportWidth = prevWidth;
+        viewportHeight = prevHeight;
+        glViewport(0, 0, prevWidth, prevHeight);
+        updateProjection();
+
+        glBindFramebuffer(GL_FRAMEBUFFER, 0);
+        if (useMsaa) {
+            glDeleteRenderbuffers(1, depthMsaa, 0);
+            glDeleteRenderbuffers(1, colorMsaa, 0);
+            glDeleteFramebuffers(1, fboMsaa, 0);
+        }
+        glDeleteRenderbuffers(1, depth, 0);
+        glDeleteTextures(1, texture, 0);
+        glDeleteFramebuffers(1, fbo, 0);
+
+        return bitmap;
+    }
+
+    private static Bitmap readPixelsToBitmap(int width, int height) {
+        int[] buffer = new int[width * height];
+        int[] source = new int[width * height];
+        IntBuffer intBuffer = IntBuffer.wrap(buffer);
+        intBuffer.position(0);
+        glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, intBuffer);
+        int offset1, offset2;
+        for (int i = 0; i < height; i++) {
+            offset1 = i * width;
+            offset2 = (height - i - 1) * width;
+            for (int j = 0; j < width; j++) {
+                int texturePixel = buffer[offset1 + j];
+                int blue = (texturePixel >> 16) & 0xff;
+                int red = (texturePixel << 16) & 0x00ff0000;
+                source[offset2 + j] = (texturePixel & 0xff00ff00) | red | blue;
+            }
+        }
+        return Bitmap.createBitmap(source, width, height, Bitmap.Config.ARGB_8888);
+    }
+
+    private CameraState applyTopViewCamera() {
+        if (bed == null || !bed.isValid()) {
+            return null;
+        }
+        Vec3d min;
+        Vec3d max;
+        if (model != null && model.getObjectsCount() > 0) {
+            min = model.getBoundingBoxApproxMin();
+            max = model.getBoundingBoxApproxMax();
+        } else {
+            min = bed.getVolumeMin();
+            max = bed.getVolumeMax();
+        }
+        Vec3d center = min.center(max);
+        double size = Math.max(max.x - min.x, max.y - min.y);
+        if (size <= 0) {
+            size = 1;
+        }
+        double fov = Math.toRadians(FOV);
+        double distance = (size / 2.0) / Math.tan(fov / 2.0);
+        distance *= TOP_VIEW_MARGIN;
+
+        CameraState state = new CameraState(camera);
+        camera.origin.set(center);
+        camera.position.set(center.x, center.y, max.z + distance);
+        camera.up.set(0, 1, 0);
+        camera.setZoom(1f);
+        return state;
+    }
+
+    private void restoreCamera(CameraState state) {
+        camera.position.set(state.position);
+        camera.origin.set(state.origin);
+        camera.up.set(state.up);
+        camera.setZoom(state.zoom);
+    }
+
+    private static final class CameraState {
+        final Vec3d position;
+        final Vec3d origin;
+        final Vec3d up;
+        final float zoom;
+
+        CameraState(Camera camera) {
+            position = new Vec3d(camera.position);
+            origin = new Vec3d(camera.origin);
+            up = new Vec3d(camera.up);
+            zoom = camera.getZoom();
+        }
+    }
+
     public double[] getProjectionMatrix() {
         return projectionMatrix;
     }
@@ -225,7 +428,7 @@ public class GLRenderer implements GLSurfaceView.Renderer {
         if (lastConfigUid != SliceBeam.CONFIG_UID) {
             configureBed();
         }
-        if (bed.isValid()) {
+        if (bed.isValid() && bedVisible) {
             bed.render(shadersManager, bottom, camera.getViewModelMatrix(), projectionMatrix, 1f / camera.getZoom());
         }
 

app/src/main/java/ru/ytkab0bp/slicebeam/slic3r/GCodeThumbnailer.java

@@ -0,0 +1,318 @@
+package ru.ytkab0bp.slicebeam.slic3r;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.util.Base64;
+import android.util.Log;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import ru.ytkab0bp.slicebeam.config.ConfigObject;
+import ru.ytkab0bp.slicebeam.view.GLView;
+
+public final class GCodeThumbnailer {
+    private static final String TAG = "GCodeThumbnailer";
+    private static final int MAX_ROW_LENGTH = 78;
+    private static final int THUMBNAIL_SUPERSAMPLE = 16;
+    private static final int MAX_SUPERSAMPLE_PIXELS = 16_000_000;
+    private static final int MAX_SUPERSAMPLE_DIM = 4096;
+    private static final Pattern SIZE_PATTERN = Pattern.compile("^(\\d+)\\s*[xX]\\s*(\\d+)$");
+
+    private GCodeThumbnailer() {}
+
+    public static boolean addThumbnailsToGcode(File gcodeFile, ConfigObject config, GLView glView) {
+        if (gcodeFile == null || config == null || glView == null) {
+            return false;
+        }
+        if (!gcodeFile.exists()) {
+            return false;
+        }
+        String binaryGcode = config.get("binary_gcode");
+        if ("1".equals(binaryGcode)) {
+            return false;
+        }
+        if (gcodeHasThumbnail(gcodeFile)) {
+            return false;
+        }
+        String thumbnails = config.get("thumbnails");
+        if (thumbnails == null || thumbnails.trim().isEmpty()) {
+            return false;
+        }
+        String defaultFormat = "PNG";
+
+        List<ThumbnailSpec> specs = parseThumbnailSpecs(thumbnails, defaultFormat);
+        if (specs.isEmpty()) {
+            return false;
+        }
+
+        String header = buildHeader(specs, glView);
+        if (header.isEmpty()) {
+            return false;
+        }
+
+        try {
+            return prependToFile(gcodeFile, header);
+        } catch (IOException e) {
+            Log.e(TAG, "Failed to add thumbnails to gcode", e);
+            return false;
+        }
+    }
+
+    private static List<ThumbnailSpec> parseThumbnailSpecs(String thumbnails, String defaultFormat) {
+        List<ThumbnailSpec> specs = new ArrayList<>();
+        for (String raw : thumbnails.split(",")) {
+            String token = raw.trim();
+            if (token.isEmpty()) {
+                continue;
+            }
+            if (token.contains("COLPIC")) {
+                continue;
+            }
+            String format = defaultFormat;
+            int slash = token.indexOf('/');
+            if (slash >= 0) {
+                format = token.substring(slash + 1).trim();
+                token = token.substring(0, slash).trim();
+            }
+            Matcher matcher = SIZE_PATTERN.matcher(token);
+            if (!matcher.matches()) {
+                continue;
+            }
+            int width = Integer.parseInt(matcher.group(1));
+            int height = Integer.parseInt(matcher.group(2));
+            if (width <= 0 || height <= 0) {
+                continue;
+            }
+            specs.add(new ThumbnailSpec(width, height, normalizeFormat(format)));
+        }
+        return specs;
+    }
+
+    private static ThumbnailFormat normalizeFormat(String format) {
+        if (format == null) {
+            return ThumbnailFormat.PNG;
+        }
+        switch (format.trim().toUpperCase(Locale.US)) {
+            case "JPG":
+            case "JPEG":
+                return ThumbnailFormat.JPG;
+            case "QOI":
+                return ThumbnailFormat.QOI;
+            default:
+                return ThumbnailFormat.PNG;
+        }
+    }
+
+    private static Bitmap captureSnapshot(GLView glView, int targetWidth, int targetHeight) {
+        CountDownLatch latch = new CountDownLatch(1);
+        Bitmap[] ref = new Bitmap[1];
+        int scale = computeSupersampleScale(targetWidth, targetHeight);
+        int width = targetWidth * scale;
+        int height = targetHeight * scale;
+        glView.queueEvent(() -> {
+            try {
+                ref[0] = glView.snapshotBitmap(width, height, true, true);
+            } catch (OutOfMemoryError e) {
+                Log.e(TAG, "Thumbnail snapshot OOM", e);
+            } catch (Exception e) {
+                Log.e(TAG, "Failed to capture GL snapshot", e);
+            } finally {
+                latch.countDown();
+            }
+        });
+        try {
+            if (!latch.await(3, TimeUnit.SECONDS)) {
+                Log.w(TAG, "Timed out waiting for GL snapshot");
+                return null;
+            }
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            return null;
+        }
+        Bitmap snapshot = ref[0];
+        if (snapshot == null) {
+            return null;
+        }
+        if (scale <= 1) {
+            return snapshot;
+        }
+        Bitmap downscaled = downscaleBitmap(snapshot, targetWidth, targetHeight);
+        if (downscaled != snapshot) {
+            snapshot.recycle();
+        }
+        return downscaled;
+    }
+
+    private static int computeSupersampleScale(int w, int h) {
+        if (w <= 0 || h <= 0) {
+            return 1;
+        }
+        int scale = THUMBNAIL_SUPERSAMPLE;
+        while (scale > 1) {
+            long pixels = (long) w * h * scale * scale;
+            if (pixels <= MAX_SUPERSAMPLE_PIXELS && w * scale <= MAX_SUPERSAMPLE_DIM && h * scale <= MAX_SUPERSAMPLE_DIM) {
+                break;
+            }
+            scale--;
+        }
+        return Math.max(1, scale);
+    }
+
+    private static String buildHeader(List<ThumbnailSpec> specs, GLView glView) {
+        StringBuilder header = new StringBuilder();
+        boolean wroteThumbnail = false;
+        for (ThumbnailSpec spec : specs) {
+            Bitmap snapshot = captureSnapshot(glView, spec.width, spec.height);
+            if (snapshot == null) {
+                continue;
+            }
+            ThumbnailFormat format = spec.format;
+            if (format == ThumbnailFormat.QOI) {
+                Log.w(TAG, "QOI thumbnails not supported, falling back to PNG");
+                format = ThumbnailFormat.PNG;
+            }
+            Bitmap scaled = snapshot;
+            if (snapshot.getWidth() != spec.width || snapshot.getHeight() != spec.height) {
+                scaled = downscaleBitmap(snapshot, spec.width, spec.height);
+                snapshot.recycle();
+            }
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            Bitmap.CompressFormat compressFormat = format == ThumbnailFormat.JPG
+                    ? Bitmap.CompressFormat.JPEG
+                    : Bitmap.CompressFormat.PNG;
+            int quality = format == ThumbnailFormat.JPG ? 90 : 100;
+            if (!scaled.compress(compressFormat, quality, out)) {
+                scaled.recycle();
+                continue;
+            }
+            scaled.recycle();
+            byte[] data = out.toByteArray();
+            if (data.length == 0) {
+                continue;
+            }
+            String tag = format == ThumbnailFormat.JPG ? "thumbnail_JPG" : "thumbnail";
+            if (!wroteThumbnail) {
+                header.append("; THUMBNAIL_BLOCK_START\n");
+                wroteThumbnail = true;
+            }
+            String encoded = Base64.encodeToString(data, Base64.NO_WRAP);
+            header.append("\n;\n; ").append(tag)
+                    .append(" begin ").append(spec.width).append("x").append(spec.height)
+                    .append(" ").append(encoded.length()).append("\n");
+            int offset = 0;
+            while (offset < encoded.length()) {
+                int end = Math.min(offset + MAX_ROW_LENGTH, encoded.length());
+                header.append("; ").append(encoded, offset, end).append("\n");
+                offset = end;
+            }
+            header.append("; ").append(tag).append(" end\n;\n");
+        }
+        if (wroteThumbnail) {
+            header.append("; THUMBNAIL_BLOCK_END\n");
+        }
+        return header.toString();
+    }
+
+    private static Bitmap downscaleBitmap(Bitmap src, int targetWidth, int targetHeight) {
+        if (src.getWidth() == targetWidth && src.getHeight() == targetHeight) {
+            return src;
+        }
+        Bitmap current = src;
+        Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
+        while (current.getWidth() / 2 >= targetWidth && current.getHeight() / 2 >= targetHeight) {
+            int nextWidth = Math.max(targetWidth, current.getWidth() / 2);
+            int nextHeight = Math.max(targetHeight, current.getHeight() / 2);
+            Bitmap next = Bitmap.createBitmap(nextWidth, nextHeight, Bitmap.Config.ARGB_8888);
+            Canvas canvas = new Canvas(next);
+            canvas.drawBitmap(current, null, new Rect(0, 0, nextWidth, nextHeight), paint);
+            if (current != src) {
+                current.recycle();
+            }
+            current = next;
+        }
+        if (current.getWidth() != targetWidth || current.getHeight() != targetHeight) {
+            Bitmap finalBmp = Bitmap.createBitmap(targetWidth, targetHeight, Bitmap.Config.ARGB_8888);
+            Canvas canvas = new Canvas(finalBmp);
+            canvas.drawBitmap(current, null, new Rect(0, 0, targetWidth, targetHeight), paint);
+            if (current != src) {
+                current.recycle();
+            }
+            current = finalBmp;
+        }
+        return current;
+    }
+
+    private static boolean prependToFile(File gcodeFile, String header) throws IOException {
+        File tmp = new File(gcodeFile.getParentFile(), gcodeFile.getName() + ".thumbtmp");
+        try (BufferedInputStream in = new BufferedInputStream(new FileInputStream(gcodeFile));
+             BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(tmp))) {
+            out.write(header.getBytes(StandardCharsets.US_ASCII));
+            byte[] buffer = new byte[8192];
+            int read;
+            while ((read = in.read(buffer)) != -1) {
+                out.write(buffer, 0, read);
+            }
+        }
+        if (!gcodeFile.delete()) {
+            tmp.delete();
+            return false;
+        }
+        if (!tmp.renameTo(gcodeFile)) {
+            tmp.delete();
+            return false;
+        }
+        return true;
+    }
+
+    private static boolean gcodeHasThumbnail(File gcodeFile) {
+        try (BufferedInputStream in = new BufferedInputStream(new FileInputStream(gcodeFile))) {
+            byte[] buffer = new byte[8192];
+            StringBuilder sb = new StringBuilder();
+            int total = 0;
+            int read;
+            while ((read = in.read(buffer)) != -1 && total < 262144) {
+                sb.append(new String(buffer, 0, read, StandardCharsets.US_ASCII));
+                if (sb.indexOf("thumbnail begin") != -1 || sb.indexOf("thumbnail_JPG begin") != -1) {
+                    return true;
+                }
+                total += read;
+            }
+        } catch (IOException ignored) {
+        }
+        return false;
+    }
+
+    private static final class ThumbnailSpec {
+        final int width;
+        final int height;
+        final ThumbnailFormat format;
+
+        ThumbnailSpec(int width, int height, ThumbnailFormat format) {
+            this.width = width;
+            this.height = height;
+            this.format = format;
+        }
+    }
+
+    private enum ThumbnailFormat {
+        PNG,
+        JPG,
+        QOI
+    }
+}

app/src/main/java/ru/ytkab0bp/slicebeam/slic3r/PrintConfigDef.java

@@ -16,7 +16,8 @@ public class PrintConfigDef {
             "tilt_up_finish_speed",
             "tilt_down_initial_speed",
             "tilt_down_finish_speed",
-            "tower_speed"
+            "tower_speed",
+            "thumbnails_format"
     );
 
     private static PrintConfigDef instance;

app/src/main/java/ru/ytkab0bp/slicebeam/slic3r/Slic3rConfigWrapper.java

@@ -90,7 +90,7 @@ public class Slic3rConfigWrapper {
             "cooling_tube_length", "high_current_on_filament_swap", "parking_pos_retraction", "extra_loading_move", "multimaterial_purging",
             "max_print_height", "default_print_profile", "inherits",
             "remaining_times", "silent_mode",
-            "machine_limits_usage", "thumbnails", "thumbnails_format",
+            "machine_limits_usage", "thumbnails",
             "machine_max_acceleration_extruding", "machine_max_acceleration_retracting", "machine_max_acceleration_travel",
             "machine_max_acceleration_x", "machine_max_acceleration_y", "machine_max_acceleration_z", "machine_max_acceleration_e",
             "machine_max_feedrate_x", "machine_max_feedrate_y", "machine_max_feedrate_z", "machine_max_feedrate_e",

app/src/main/java/ru/ytkab0bp/slicebeam/view/GLView.java

@@ -25,6 +25,10 @@ import android.view.ViewConfiguration;
 import java.nio.IntBuffer;
 import java.util.ArrayList;
 
+import javax.microedition.khronos.egl.EGL10;
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.egl.EGLDisplay;
+
 import ru.ytkab0bp.slicebeam.R;
 import ru.ytkab0bp.slicebeam.SliceBeam;
 import ru.ytkab0bp.slicebeam.events.LongClickTranslationEvent;
@@ -85,6 +89,7 @@ public class GLView extends GLSurfaceView implements IThemeView {
         xferPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
 
         setEGLContextClientVersion(3);
+        setEGLConfigChooser(new MultisampleConfigChooser());
         renderer = new GLRenderer(this);
 
         setRenderer(renderer);
@@ -242,6 +247,89 @@ public class GLView extends GLSurfaceView implements IThemeView {
         return Bitmap.createBitmap(bitmapSource, w, h, Bitmap.Config.ARGB_8888);
     }
 
+    public Bitmap snapshotBitmap(boolean hideBed) {
+        if (!hideBed) {
+            return snapshotBitmap();
+        }
+
+        boolean prev = renderer.isBedVisible();
+        renderer.setBedVisible(false);
+        renderer.onDrawFrame(null);
+        Bitmap snapshot = snapshotBitmap();
+        renderer.setBedVisible(prev);
+        return snapshot;
+    }
+
+    public Bitmap snapshotBitmap(boolean hideBed, int scaleFactor) {
+        if (scaleFactor <= 1) {
+            return snapshotBitmap(hideBed);
+        }
+        int w = getWidth();
+        int h = getHeight();
+        if (w <= 0 || h <= 0) {
+            return null;
+        }
+        return renderer.renderToBitmap(w * scaleFactor, h * scaleFactor, hideBed, false);
+    }
+
+    public Bitmap snapshotBitmap(int width, int height, boolean hideBed) {
+        return renderer.renderToBitmap(width, height, hideBed, false);
+    }
+
+    public Bitmap snapshotBitmap(int width, int height, boolean hideBed, boolean topView) {
+        return renderer.renderToBitmap(width, height, hideBed, topView);
+    }
+
+    private static final class MultisampleConfigChooser implements EGLConfigChooser {
+        private static final int EGL_OPENGL_ES2_BIT = 4;
+
+        @Override
+        public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
+            int[] configSpec = {
+                    EGL10.EGL_RED_SIZE, 8,
+                    EGL10.EGL_GREEN_SIZE, 8,
+                    EGL10.EGL_BLUE_SIZE, 8,
+                    EGL10.EGL_ALPHA_SIZE, 8,
+                    EGL10.EGL_DEPTH_SIZE, 16,
+                    EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+                    EGL10.EGL_SAMPLE_BUFFERS, 1,
+                    EGL10.EGL_SAMPLES, 4,
+                    EGL10.EGL_NONE
+            };
+            EGLConfig config = chooseConfig(egl, display, configSpec);
+            if (config != null) {
+                return config;
+            }
+
+            int[] fallbackSpec = {
+                    EGL10.EGL_RED_SIZE, 8,
+                    EGL10.EGL_GREEN_SIZE, 8,
+                    EGL10.EGL_BLUE_SIZE, 8,
+                    EGL10.EGL_ALPHA_SIZE, 8,
+                    EGL10.EGL_DEPTH_SIZE, 16,
+                    EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+                    EGL10.EGL_NONE
+            };
+            return chooseConfig(egl, display, fallbackSpec);
+        }
+
+        private EGLConfig chooseConfig(EGL10 egl, EGLDisplay display, int[] configSpec) {
+            int[] numConfigs = new int[1];
+            if (!egl.eglChooseConfig(display, configSpec, null, 0, numConfigs)) {
+                return null;
+            }
+            int count = numConfigs[0];
+            if (count <= 0) {
+                return null;
+            }
+            EGLConfig[] configs = new EGLConfig[count];
+            if (!egl.eglChooseConfig(display, configSpec, configs, count, numConfigs)) {
+                return null;
+            }
+            return configs[0];
+        }
+    }
+
     @Override
     protected void onConfigurationChanged(Configuration newConfig) {
         super.onConfigurationChanged(newConfig);

app/src/main/jni/libslic3r/GCode.cpp

@@ -1021,7 +1021,9 @@ void GCodeGenerator::_do_export(Print& print, GCodeOutputStream &file, Thumbnail
 
     if (!export_to_binary_gcode)
         // Write information on the generator.
-        file.write_format("; %s\n\n", Slic3r::header_slic3r_generated().c_str());
+        file.write("; HEADER_BLOCK_START\n");
+        file.write_format("; %s\n", Slic3r::header_slic3r_generated().c_str());
+        file.write("; HEADER_BLOCK_END\n\n");
 
     if (! export_to_binary_gcode) {
         // if exporting gcode in ascii format, generate the thumbnails here
@@ -1563,13 +1565,13 @@ void GCodeGenerator::process_layers(
         [&output_stream](std::string s) { output_stream.write(s); }
     );
 
-    tbb::filter<void, LayerResult> pipeline_to_layerresult = smooth_path_interpolator & generator;
+    auto pipeline_to_layerresult = smooth_path_interpolator & generator;
     if (m_spiral_vase)
         pipeline_to_layerresult = pipeline_to_layerresult & spiral_vase;
     if (m_pressure_equalizer)
         pipeline_to_layerresult = pipeline_to_layerresult & pressure_equalizer;
 
-    tbb::filter<LayerResult, std::string> pipeline_to_string = cooling;
+    auto pipeline_to_string = cooling;
     if (m_find_replace)
         pipeline_to_string = pipeline_to_string & find_replace;
 
@@ -1656,13 +1658,13 @@ void GCodeGenerator::process_layers(
         [&output_stream](std::string s) { output_stream.write(s); }
     );
 
-    tbb::filter<void, LayerResult> pipeline_to_layerresult = smooth_path_interpolator & generator;
+    auto pipeline_to_layerresult = smooth_path_interpolator & generator;
     if (m_spiral_vase)
         pipeline_to_layerresult = pipeline_to_layerresult & spiral_vase;
     if (m_pressure_equalizer)
         pipeline_to_layerresult = pipeline_to_layerresult & pressure_equalizer;
 
-    tbb::filter<LayerResult, std::string> pipeline_to_string = cooling;
+    auto pipeline_to_string = cooling;
     if (m_find_replace)
         pipeline_to_string = pipeline_to_string & find_replace;
 

app/src/main/jni/occt_wrapper/OCCTWrapper.cpp

@@ -21,6 +21,9 @@
 #include "BRepBuilderAPI_Transform.hxx"
 #include "TopExp_Explorer.hxx"
 #include "BRep_Tool.hxx"
+#include "NCollection_Sequence.hxx"
+
+using TDF_LabelSequence = NCollection_Sequence<TDF_Label>;
 
 const double STEP_TRANS_CHORD_ERROR = 0.005;
 const double STEP_TRANS_ANGLE_RES = 1;
@@ -198,4 +201,4 @@ try {
     return true;
 }
 
-}; // namespace Slic3r
+}; // namespace Slic3r

app/src/main/jni/slicebeam/beam_native.cpp

@@ -1,6 +1,7 @@
 #include <android/log.h>
 
 #include <jni.h>
+#include <thread>
 #include "libslic3r/libslic3r.h"
 #include "libslic3r/Config.hpp"
 #include "libslic3r/Model.hpp"

build.gradle

@@ -5,7 +5,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.5.2'
+        classpath 'com.android.tools.build:gradle:8.13.2'
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Mon Aug 05 19:06:18 MSK 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle

@@ -1,7 +1,47 @@
+def localPropsFile = file("local.properties")
+if (!localPropsFile.exists()) {
+    def sdkRoot = System.getenv("ANDROID_SDK_ROOT") ?: System.getenv("ANDROID_HOME")
+    if (!sdkRoot) {
+        def localAppData = System.getenv("LOCALAPPDATA")
+        if (localAppData) {
+            def defaultSdk = new File(localAppData, "Android\\Sdk")
+            if (defaultSdk.exists()) {
+                sdkRoot = defaultSdk.absolutePath
+            }
+        }
+    }
+    if (sdkRoot) {
+        localPropsFile.text = "sdk.dir=${sdkRoot.replace('\\', '\\\\')}\n"
+    }
+}
+
+def hasSubmodules = file(".gitmodules").exists()
+def submoduleRoots = [
+        file("EventBus/eventbus"),
+        file("EventBus/eventbus_api"),
+        file("EventBus/eventbus_processor"),
+        file("SAPIL/sapil")
+]
+def missingSubmodule = submoduleRoots.any { !it.exists() }
+if (hasSubmodules && missingSubmodule) {
+    try {
+        def proc = new ProcessBuilder("git", "submodule", "update", "--init", "--recursive")
+                .directory(rootDir)
+                .redirectErrorStream(true)
+                .start()
+        proc.inputStream.eachLine { println(it) }
+        if (proc.waitFor() != 0) {
+            println("Warning: git submodule update failed; run it manually if build fails.")
+        }
+    } catch (Exception e) {
+        println("Warning: unable to run git submodule update; run it manually if build fails.")
+    }
+}
+
 rootProject.name = "Slice Beam"
 include ':app', ':eventbus', ':eventbus_api', ':eventbus_processor', ':sapil'
 
 project(':eventbus').projectDir = file('EventBus/eventbus')
 project(':eventbus_api').projectDir = file('EventBus/eventbus_api')
 project(':eventbus_processor').projectDir = file('EventBus/eventbus_processor')
-project(':sapil').projectDir = file('SAPIL/sapil')
+project(':sapil').projectDir = file('SAPIL/sapil')