Working template (RmlUi 6.2)

Needs:
- Lua plugin
- SVG plugin

android/app/CMakeLists.txt

@@ -0,0 +1,86 @@
+
+cmake_minimum_required(VERSION 3.22.1)
+project(rmlandroid LANGUAGES C CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+include(ExternalProject)
+
+set(DEPS_INSTALL ${CMAKE_BINARY_DIR}/deps/install)
+
+set(ANDROID_TOOLCHAIN_ARGS
+  -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
+  -DANDROID_ABI=${ANDROID_ABI}
+  -DANDROID_PLATFORM=${ANDROID_PLATFORM}
+  -DANDROID_STL=c++_shared
+  -DCMAKE_BUILD_TYPE=Release
+  -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL}
+  -DCMAKE_PREFIX_PATH=${DEPS_INSTALL}
+  -DBUILD_SHARED_LIBS=OFF
+  -DCMAKE_CXX_STANDARD=17
+  -DCMAKE_CXX_STANDARD_REQUIRED=ON
+  -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=BOTH
+  -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=BOTH
+  -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=BOTH
+)
+
+find_package(SDL3 REQUIRED CONFIG)
+find_package(SDL3_image REQUIRED CONFIG)
+
+ExternalProject_Add(freetype_ext
+  GIT_REPOSITORY https://github.com/freetype/freetype.git
+  GIT_TAG VER-2-13-3
+  CMAKE_ARGS ${ANDROID_TOOLCHAIN_ARGS}
+    -DFT_DISABLE_ZLIB=TRUE
+    -DFT_DISABLE_BZIP2=TRUE
+    -DFT_DISABLE_PNG=TRUE
+    -DFT_DISABLE_HARFBUZZ=TRUE
+    -DFT_DISABLE_BROTLI=TRUE
+)
+
+ExternalProject_Add(rmlui_ext
+  GIT_REPOSITORY https://github.com/mikke89/RmlUi.git
+  GIT_TAG 6.2
+  CMAKE_ARGS ${ANDROID_TOOLCHAIN_ARGS}
+    -DFreetype_ROOT=${DEPS_INSTALL}
+    -DRMLUI_SAMPLES=OFF
+    -DBUILD_TESTING=OFF
+  DEPENDS freetype_ext
+)
+
+set(PROJECT_SRC_DIR ${CMAKE_SOURCE_DIR}/../../src)
+set(RMLUI_BACKEND_DIR ${CMAKE_SOURCE_DIR}/../../vendor/rmlui_backend)
+
+add_library(rmlandroid SHARED
+  ${PROJECT_SRC_DIR}/main.cpp
+  
+  ${RMLUI_BACKEND_DIR}/RmlUi_Backend_SDL_SDLrenderer.cpp
+  ${RMLUI_BACKEND_DIR}/RmlUi_Platform_SDL.cpp
+  ${RMLUI_BACKEND_DIR}/RmlUi_Renderer_SDL.cpp
+)
+
+add_dependencies(rmlandroid freetype_ext rmlui_ext)
+
+target_include_directories(rmlandroid PRIVATE
+  ${PROJECT_SRC_DIR}
+  ${RMLUI_BACKEND_DIR}
+  ${DEPS_INSTALL}/include
+)
+
+target_compile_definitions(rmlandroid PRIVATE
+  RMLUI_SDL_VERSION_MAJOR=3
+  RMLUI_STATIC_LIB
+)
+
+target_link_directories(rmlandroid PRIVATE ${DEPS_INSTALL}/lib)
+
+target_link_libraries(rmlandroid PRIVATE
+  SDL3::SDL3
+  SDL3_image::SDL3_image
+  rmlui
+  rmlui_debugger
+  freetype
+)
+
+target_link_options(rmlandroid PRIVATE "-Wl,-u,SDL_main")

android/app/build.gradle.kts

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+plugins {
+    id("com.android.application")
+}
+
+android {
+    namespace = "com.rmlandroid.app"
+    compileSdk = 34
+    ndkVersion = "26.3.11579264"
+
+    defaultConfig {
+        applicationId = "com.rmlandroid.app"
+        minSdk = 24
+        targetSdk = 34
+        versionCode = 1
+        versionName = "0.1.0"
+
+        ndk {
+            abiFilters += listOf("arm64-v8a")
+        }
+
+        externalNativeBuild {
+            cmake {
+                arguments += "-DANDROID_STL=c++_shared"
+                cppFlags += "-std=c++17"
+            }
+        }
+    }
+
+    buildFeatures {
+        prefab = true
+    }
+
+    externalNativeBuild {
+        cmake {
+            path = file("CMakeLists.txt")
+            version = "3.22.1"
+        }
+    }
+
+    sourceSets {
+        getByName("main") {
+            assets.srcDirs("../../assets")
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    packaging {
+        jniLibs {
+            useLegacyPackaging = true
+        }
+    }
+}
+
+dependencies {
+    implementation(files("libs/SDL3-3.4.14.aar"))
+    implementation(files("libs/SDL3_image-3.4.4.aar"))
+}

android/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-feature android:glEsVersion="0x00030000" android:required="true" />
+    <!-- <uses-permission android:name="android.permission.INTERNET" /> -->
+
+    <application
+        android:allowBackup="true"
+        android:label="RmlAndroid"
+        android:hasCode="true">
+
+        <activity
+            android:name="com.rmlandroid.app.MainActivity"
+            android:label="RmlAndroid"
+            android:configChanges="orientation|screenSize|keyboardHidden"
+            android:exported="true"
+            android:screenOrientation="fullSensor"
+            android:theme="@android:style/Theme.Black.NoTitleBar">
+
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

android/app/src/main/java/com/rmlandroid/app/MainActivity.java

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+
+package com.rmlandroid.app;
+
+import org.libsdl.app.SDLActivity;
+
+public class MainActivity extends SDLActivity {
+    @Override
+    protected String[] getLibraries() {
+        return new String[] {
+            "SDL3",
+            "rmlandroid"
+        };
+    }
+}