filament/android/build.gradle

// This script accepts the following parameters:
//
// com.google.android.filament.dist-dir
//     Path to the Filament distribution/install directory for Android
//     (produced by make/ninja install). This directory must contain lib/arm64-v8a/ etc.
//
// com.google.android.filament.tools-dir
//     Path to the Filament distribution/install directory for desktop.
//     This directory must contain bin/matc.
//
// com.google.android.filament.exclude-vulkan
//     When set, support for Vulkan will be excluded.
//
// com.google.android.filament.include-webgpu
//     When set, enables WebGPU support.
//
// com.google.android.filament.fgviewer
//     When set, enables fgviewer
//
// com.google.android.filament.matdbg
//     When set, enables matdbg
//
// com.google.android.filament.matnopt
//     When set, disable shader optimizations.
//
// com.google.android.filament.skip-samples
//     Exclude samples from the project. Useful to speed up compilation.
//
// com.google.android.filament.abis
//     List of supported ABIs to build as a comma separated list. Available options are:
//         arm64-v8a, armeabi-v7a, x86_64, x86, all
//     Defaults to all.
//
// Example:
//     ./gradlew -Pcom.google.android.filament.dist-dir=../dist-android-release \
//               -Pcom.google.android.filament.abis=x86 \
//               assembleRelease

// Publishing to Maven Central:
//   - Build and upload artifacts with ./gradlew publish
//   - Close and release staging repo on Nexus with ./gradlew closeAndReleaseStagingRepository
//
// The following is needed in ~/gradle/gradle.properties:
//
//     sonatypeUsername=nexus_user
//     sonatypePassword=nexus_password
//
//     signing.keyId=pgp_key_id
//     signing.password=pgp_key_password
//     signing.secretKeyRingFile=/Users/user/.gnupg/maven_signing.key
//

buildscript {
    def path = providers
            .gradleProperty("com.google.android.filament.dist-dir")
            .get()

    def directory = objects.fileProperty().fileValue(new File(path)).getAsFile().get()
    def filamentPath = directory.absolutePath

    // Our CMake scripts require a forward-slash path for the FILAMENT_DIST_DIR
    // variable, so here we convert the native path to a forward-slash path.
    filamentPath = filamentPath.replace(File.separator, '/')

    // Warning: changing this property does not work well with incremental builds.
    def excludeVulkan = providers
            .gradleProperty("com.google.android.filament.exclude-vulkan")
            .isPresent()

    def includeWebGPU = providers
            .gradleProperty("com.google.android.filament.include-webgpu")
            .isPresent()

    def fgviewer = providers
                 .gradleProperty("com.google.android.filament.fgviewer")
                 .isPresent()

    def matdbg = providers
            .gradleProperty("com.google.android.filament.matdbg")
            .isPresent()

    def matnopt = providers
            .gradleProperty("com.google.android.filament.matnopt")
            .isPresent()

    def abis = ["arm64-v8a", "armeabi-v7a", "x86_64", "x86"]
    def newAbis = providers
            .gradleProperty("com.google.android.filament.abis")
            .get()
            .split(',')
    if (!newAbis.contains("all")) {
        abis = newAbis
    }

    ext.versions = [
        'jdk': 17,
        'minSdk': 21,
        'targetSdk': 34,
        'compileSdk': 34,
        'kotlin': '2.0.21',
        'kotlin_coroutines': '1.9.0',
        'buildTools': '35.0.0',
        'ndk': '29.0.14206865',
        'androidx_core': '1.13.1',
        'androidx_annotations': '1.9.0'
    ]

    ext.deps = [
        'androidx': [
            'annotations': "androidx.annotation:annotation:${versions.androidx_annotations}",
            'core': "androidx.core:core:${versions.androidx_core}",
        ],
        'kotlin': "org.jetbrains.kotlin:kotlin-stdlib-jdk8:${versions.kotlin}",
        'coroutines': [
            'core': "org.jetbrains.kotlinx:kotlinx-coroutines-core:${versions.kotlin_coroutines}",
            'android': "org.jetbrains.kotlinx:kotlinx-coroutines-android:${versions.kotlin_coroutines}",
        ]
    ]

    dependencies {
        classpath 'com.android.tools.build:gradle:8.6.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${versions.kotlin}"
    }

    ext.cmakeArgs = [
        "--no-warn-unused-cli",
        "-DANDROID_WEAK_API_DEFS=ON",
        "-DANDROID_PIE=ON",
        "-DANDROID_PLATFORM=21",
        "-DANDROID_STL=c++_static",
        "-DFILAMENT_DIST_DIR=${filamentPath}".toString(),
        "-DFILAMENT_SUPPORTS_VULKAN=${excludeVulkan ? 'OFF' : 'ON'}".toString(),
        "-DFILAMENT_SUPPORTS_WEBGPU=${includeWebGPU ? 'ON' : 'OFF'}".toString(),
        "-DFILAMENT_ENABLE_FGVIEWER=${fgviewer ? 'ON' : 'OFF'}".toString(),
        "-DFILAMENT_ENABLE_MATDBG=${matdbg ? 'ON' : 'OFF'}".toString(),
        "-DFILAMENT_DISABLE_MATOPT=${matnopt ? 'ON' : 'OFF'}".toString()
    ]

    ext.cppFlags = [
        "-std=c++17",
        "-fno-stack-protector",
        "-fno-exceptions",
        "-fno-unwind-tables",
        "-fno-asynchronous-unwind-tables",
        "-fno-rtti",
        "-ffast-math",
        "-fno-finite-math-only",
        "-ffp-contract=fast",
        "-fvisibility-inlines-hidden",
        "-fvisibility=hidden",
        "-fomit-frame-pointer",
        "-ffunction-sections",
        "-fdata-sections",
        "-no-canonical-prefixes",
        "-Wformat",
        "-Werror=format-security",
        "-Wno-unused-command-line-argument",
        "-Wl,--gc-sections",
        "-Wl,-Bsymbolic-functions",
        "-Wl,--hash-style=both", // Required to support API levels below 23
    ]

    ext.abis = abis

    repositories {
        mavenCentral()
        google()
    }
}

plugins {
    id "io.github.gradle-nexus.publish-plugin" version "1.3.0"
}

// See https://github.com/gradle-nexus/publish-plugin
// Publish to https://oss.sonatype.org/ (not s01)
nexusPublishing {
    packageGroup = 'com.google.android'
    repositories {
        sonatype {
            stagingProfileId = '9a75a224a4f17b'
            nexusUrl.set(uri("https://ossrh-staging-api.central.sonatype.com/service/local/"))
            snapshotRepositoryUrl.set(uri("https://central.sonatype.com/repository/maven-snapshots/"))
        }
    }
}

subprojects {
    group = GROUP
    version = VERSION_NAME

    repositories {
        mavenCentral()
        google()
    }

    if (!name.startsWith("sample")) {
        apply plugin: 'com.android.library'

        android {
            buildToolsVersion versions.buildTools
            compileSdkVersion versions.compileSdk
            ndkVersion versions.ndk

            defaultConfig {
                minSdkVersion versions.minSdk
                targetSdkVersion versions.targetSdk

                externalNativeBuild {
                    cmake {
                        arguments.addAll(rootProject.ext.cmakeArgs)
                        cppFlags.addAll(rootProject.ext.cppFlags)
                    }
                }

                ndk {
                    //noinspection ChromeOsAbiSupport
                    abiFilters(*rootProject.ext.abis)
                }

                consumerProguardFiles '../proguard-rules.pro'
            }

            externalNativeBuild {
                cmake {
                    version "3.19.0+"
                    path "CMakeLists.txt"
                }
            }

            sourceSets {
                main {
                    jni.srcDirs "src/main/cpp"
                }
            }

            compileOptions {
                sourceCompatibility versions.jdk
                targetCompatibility versions.jdk
            }
        }
    }
}

gradle.taskGraph.whenReady {
    gradle.taskGraph.allTasks.each {
        it.onlyIf {
            !it.project.ext.has('isSample') ||
                    !project.hasProperty('com.google.android.filament.skip-samples')
         }
    }
}