Add android demo. (#19)

android/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

android/app/.gitignore

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+/build

android/app/build.gradle.kts

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+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "io.pag.tgfxdemo"
+    compileSdk = 33
+
+    defaultConfig {
+        applicationId = "io.pag.tgfxdemo"
+        minSdk = 24
+        targetSdk = 33
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+        externalNativeBuild {
+            cmake {
+                cppFlags("-std=c++17")
+                arguments("-DANDROID_STL=c++_static")
+            }
+        }
+        ndk {
+            abiFilters.add("armeabi-v7a")
+            abiFilters.add("arm64-v8a")
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    externalNativeBuild {
+        cmake {
+            path("src/main/cpp/CMakeLists.txt")
+            version = "3.22.1"
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.4.3"
+    }
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+    implementation("androidx.core:core-ktx:1.9.0")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.1")
+    implementation("androidx.activity:activity-compose:1.7.2")
+    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-graphics")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
+    androidTestImplementation("androidx.compose.ui:ui-test-junit4")
+    debugImplementation("androidx.compose.ui:ui-tooling")
+    debugImplementation("androidx.compose.ui:ui-test-manifest")
+}

android/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

android/app/src/androidTest/java/io/pag/tgfxdemo/ExampleInstrumentedTest.kt

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+package io.pag.tgfxdemo
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("io.pag.tgfxdemo", appContext.packageName)
+    }
+}

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"
+        xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+            android:allowBackup="true"
+            android:dataExtractionRules="@xml/data_extraction_rules"
+            android:fullBackupContent="@xml/backup_rules"
+            android:icon="@mipmap/ic_launcher"
+            android:label="@string/app_name"
+            android:roundIcon="@mipmap/ic_launcher_round"
+            android:supportsRtl="true"
+            android:theme="@style/Theme.TGFXDemo"
+            tools:targetApi="31">
+        <activity
+                android:name=".MainActivity"
+                android:exported="true"
+                android:label="@string/app_name"
+                android:theme="@style/Theme.TGFXDemo">
+            <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/cpp/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+project(TGFXDemo)
+
+set(TGFX_DEMO_INCLUDES ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../include)
+
+find_library(LOG_LIB log)
+list(APPEND TGFX_DEMO_SHARED_LIBS ${LOG_LIB})
+find_library(ANDROID_LIB android)
+list(APPEND TGFX_DEMO_SHARED_LIBS ${ANDROID_LIB})
+
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../../../../ ./tgfx)
+
+add_library(tgfxdemo SHARED JTGFXView.cpp)
+target_include_directories(tgfxdemo PRIVATE ${TGFX_DEMO_INCLUDES})
+target_link_libraries(tgfxdemo tgfx ${TGFX_DEMO_SHARED_LIBS})

android/app/src/main/cpp/JTGFXView.cpp

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+#include <jni.h>
+#include <string>
+#include <jni.h>
+#include <android/native_window_jni.h>
+#include "tgfx/gpu/Window.h"
+#include "tgfx/opengl/egl/EGLWindow.h"
+
+namespace tgfxdemo {
+static jfieldID TGFXView_nativePtr;
+
+class JTGFXView {
+ public:
+  explicit JTGFXView(ANativeWindow* nativeWindow, std::shared_ptr<tgfx::Window> window)
+      : nativeWindow(nativeWindow), window(std::move(window)) {
+    updateSize();
+  }
+
+  ~JTGFXView() {
+    ANativeWindow_release(nativeWindow);
+  }
+
+  void updateSize() {
+    _width = ANativeWindow_getWidth(nativeWindow);
+    _height = ANativeWindow_getHeight(nativeWindow);
+    surface = nullptr;
+  }
+
+  void draw() {
+    if (surface == nullptr) {
+      createSurface();
+    }
+    if (surface == nullptr) {
+      return;
+    }
+    auto device = window->getDevice();
+    auto context = device->lockContext();
+    if (context == nullptr) {
+      return;
+    }
+    auto canvas = surface->getCanvas();
+    canvas->clear();
+    tgfx::Paint paint;
+    paint.setColor(tgfx::Color{0.8f, 0.8f, 0.8f, 1.f});
+    if (drawCount % 2 == 0) {
+      auto rect = tgfx::Rect::MakeXYWH(20, 20, 100, 100);
+      canvas->drawRect(rect, paint);
+    } else {
+      int tileSize = 8;
+      for (int y = 0; y < _height; y += tileSize) {
+        bool draw = (y / tileSize) % 2 == 1;
+        for (int x = 0; x < _width; x += tileSize) {
+          if (draw) {
+            auto rect = tgfx::Rect::MakeXYWH(static_cast<float>(x), static_cast<float>(y),
+                                             static_cast<float>(tileSize), static_cast<float>(tileSize));
+            canvas->drawRect(rect, paint);
+          }
+          draw = !draw;
+        }
+      }
+    }
+    surface->flush();
+    context->submit();
+    window->present(context);
+    device->unlock();
+    drawCount++;
+  }
+
+ private:
+  void createSurface() {
+    if (_width <= 0 || _height <= 0) {
+      return;
+    }
+    auto device = window->getDevice();
+    auto context = device->lockContext();
+    if (context == nullptr) {
+      return;
+    }
+    surface = window->createSurface(context);
+    device->unlock();
+  }
+
+  ANativeWindow* nativeWindow = nullptr;
+  std::shared_ptr<tgfx::Window> window;
+  std::shared_ptr<tgfx::Surface> surface;
+  int _width = 0;
+  int _height = 0;
+  int drawCount = 0;
+};
+}
+
+tgfxdemo::JTGFXView* getJTGFXView(JNIEnv* env, jobject thiz) {
+  return reinterpret_cast<tgfxdemo::JTGFXView*>(env->GetLongField(thiz,
+                                                                  tgfxdemo::TGFXView_nativePtr));
+}
+
+extern "C" {
+JNIEXPORT void JNICALL
+Java_io_pag_tgfxdemo_TGFXView_nativeRelease(JNIEnv* env, jobject thiz) {
+  auto jTGFXView =
+      reinterpret_cast<tgfxdemo::JTGFXView*>(env->GetLongField(thiz, tgfxdemo::TGFXView_nativePtr));
+  delete jTGFXView;
+}
+
+JNIEXPORT void JNICALL
+Java_io_pag_tgfxdemo_TGFXView_00024Companion_nativeInit(JNIEnv* env, jobject thiz) {
+  auto clazz = env->FindClass("io/pag/tgfxdemo/TGFXView");
+  tgfxdemo::TGFXView_nativePtr = env->GetFieldID(clazz, "nativePtr", "J");
+}
+
+JNIEXPORT jlong JNICALL
+Java_io_pag_tgfxdemo_TGFXView_00024Companion_setupFromSurface(JNIEnv* env, jobject,
+                                                              jobject surface) {
+
+  if (surface == nullptr) {
+    printf("SetupFromSurface() Invalid surface specified.\n");
+    return 0;
+  }
+  auto nativeWindow = ANativeWindow_fromSurface(env, surface);
+  auto window = tgfx::EGLWindow::MakeFrom(nativeWindow);
+  if (window == nullptr) {
+    printf("SetupFromSurface() Invalid surface specified.\n");
+    return 0;
+  }
+  return reinterpret_cast<jlong>(new tgfxdemo::JTGFXView(nativeWindow, std::move(window)));
+}
+
+JNIEXPORT void JNICALL
+Java_io_pag_tgfxdemo_TGFXView_nativeDraw(JNIEnv* env, jobject thiz) {
+  auto* view = getJTGFXView(env, thiz);
+  if (view == nullptr) {
+    return;
+  }
+  view->draw();
+}
+
+JNIEXPORT void JNICALL
+Java_io_pag_tgfxdemo_TGFXView_updateSize(JNIEnv* env, jobject thiz) {
+  auto* view = getJTGFXView(env, thiz);
+  if (view == nullptr) {
+    return;
+  }
+  view->updateSize();
+}
+}

android/app/src/main/java/io/pag/tgfxdemo/MainActivity.kt

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+package io.pag.tgfxdemo
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        val view = findViewById<TGFXView>(R.id.tgfx_demo_view)
+        view.setOnClickListener {
+            view.draw()
+        }
+    }
+}