cocos_lib/cocos/platform/android/jni/JniCocosSurfaceView.cpp

/****************************************************************************
 Copyright (c) 2020-2023 Xiamen Yaji Software Co., Ltd.

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#include <android/keycodes.h>
#include <android/log.h>
#include <android/native_window.h>
#include <android/native_window_jni.h>
#include <jni.h>
#include "application/ApplicationManager.h"
#include "base/memory/Memory.h"
#include "engine/EngineEvents.h"
#include "platform/android/AndroidPlatform.h"
#include "platform/java/modules/SystemWindow.h"
#include "platform/java/modules/SystemWindowManager.h"

namespace {
struct cc::TouchEvent touchEvent;

class NativeWindowCache {
public:
    explicit NativeWindowCache(int windowId) : _windowId{windowId} {
    }

    ~NativeWindowCache() {
        setSurface(nullptr);
    }

    void setSurface(jobject surface) {
        if (_nativeWindow != nullptr) {
            ANativeWindow_release(_nativeWindow);
        }
        if (surface != nullptr) {
            _nativeWindow = ANativeWindow_fromSurface(env, surface);
        } else {
            _nativeWindow = nullptr;
        }
    }

    ANativeWindow *getNativeWindow() {
        return _nativeWindow;
    }

    int getWindowId() const {
        return _windowId;
    }

    JNIEnv *env;

private:
    int _windowId{0};
    ANativeWindow *_nativeWindow{nullptr};
};
} // namespace

//#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, "JniCocosSurfaceView JNI", __VA_ARGS__)

extern "C" {

JNIEXPORT jlong Java_com_cocos_lib_CocosSurfaceView_constructNative(JNIEnv *env, jobject /*thiz*/, jint windowId) { // NOLINT JNI function name
    auto *cache = ccnew NativeWindowCache(windowId);
    cache->env = env;
    return reinterpret_cast<jlong>(cache);
}

JNIEXPORT void JNICALL Java_com_cocos_lib_CocosSurfaceView_destructNative(JNIEnv * /*env*/, jobject /*thiz*/, jlong handle) { // NOLINT JNI function name
    auto *windowCache = reinterpret_cast<NativeWindowCache *>(handle);
    CC_SAFE_DELETE(windowCache);
}

JNIEXPORT void JNICALL Java_com_cocos_lib_CocosSurfaceView_onSizeChangedNative(JNIEnv * /*env*/, jobject /*thiz*/, jint windowId, jint width, jint height) { // NOLINT JNI function name
    auto func = [width, height, windowId]() -> void {
        cc::events::Resize::broadcast(width, height, windowId);
    };
    CC_CURRENT_ENGINE()->getScheduler()->performFunctionInCocosThread(func);
}

JNIEXPORT void JNICALL Java_com_cocos_lib_CocosSurfaceView_onSurfaceRedrawNeededNative(JNIEnv * /*env*/, jobject /*thiz*/, jlong handle) { // NOLINT JNI function name
    //
}

JNIEXPORT void JNICALL Java_com_cocos_lib_CocosSurfaceView_onSurfaceCreatedNative(JNIEnv *env, jobject /*thiz*/, jlong handle, jobject surface) { // NOLINT JNI function name
    CC_UNUSED_PARAM(env);
    auto *windowCache = reinterpret_cast<NativeWindowCache *>(handle);
    ANativeWindow *oldNativeWindow = windowCache->getNativeWindow();
    windowCache->setSurface(surface);
    ANativeWindow *nativeWindow = windowCache->getNativeWindow();

    auto *platform = static_cast<cc::AndroidPlatform *>(cc::BasePlatform::getPlatform());
    auto *windowMgr = platform->getInterface<cc::SystemWindowManager>();
    auto *iSysWindow = windowMgr->getWindow(windowCache->getWindowId());
    auto *sysWindow = static_cast<cc::SystemWindow *>(iSysWindow);
    sysWindow->setWindowHandle(nativeWindow);
    if (oldNativeWindow) {
        auto func = [sysWindow]() -> void {
            cc::events::WindowRecreated::broadcast(sysWindow->getWindowId());
        };
        CC_CURRENT_ENGINE()->getScheduler()->performFunctionInCocosThread(func);
    }
}

JNIEXPORT void JNICALL Java_com_cocos_lib_CocosSurfaceView_onSurfaceChangedNative(JNIEnv *env, // NOLINT JNI function name
                                                                                  jobject /*thiz*/,
                                                                                  jlong handle,
                                                                                  jobject surface,
                                                                                  jint format,
                                                                                  jint width,
                                                                                  jint height) {
    CC_UNUSED_PARAM(env);
    CC_UNUSED_PARAM(format);
    CC_UNUSED_PARAM(width);
    CC_UNUSED_PARAM(height);
    if (handle != 0) {
        auto *windowCache = (NativeWindowCache *)handle;
        ANativeWindow *oldNativeWindow = windowCache->getNativeWindow();
        // Fix for window being destroyed behind the scenes on older Android
        // versions.
        if (oldNativeWindow != nullptr) {
            ANativeWindow_acquire(oldNativeWindow);
        }

        windowCache->setSurface(surface);
        ANativeWindow *newNativeWindow = windowCache->getNativeWindow();
        if (oldNativeWindow != newNativeWindow) {
            auto *iSysWindow = CC_GET_PLATFORM_INTERFACE(cc::SystemWindowManager)->getWindow(windowCache->getWindowId());
            auto *sysWindow = static_cast<cc::SystemWindow *>(iSysWindow);
            sysWindow->setWindowHandle(newNativeWindow);

            auto func = [sysWindow]() -> void {
                cc::events::WindowRecreated::broadcast(sysWindow->getWindowId());
            };
            CC_CURRENT_ENGINE()->getScheduler()->performFunctionInCocosThread(func);
        }
        // Release the window we acquired earlier.
        if (oldNativeWindow != nullptr) {
            ANativeWindow_release(oldNativeWindow);
        }
    }
}

JNIEXPORT void JNICALL Java_com_cocos_lib_CocosSurfaceView_onSurfaceDestroyedNative(JNIEnv *env, jobject /*thiz*/, jlong handle) { // NOLINT JNI function name
    auto *windowCache = (NativeWindowCache *)handle;
    ANativeWindow *nativeWindow = windowCache->getNativeWindow();

    // todo: destroy gfx surface
    auto func = [nativeWindow]() -> void {
        auto *platform = static_cast<cc::AndroidPlatform *>(cc::BasePlatform::getPlatform());
        auto *windowMgr = platform->getInterface<cc::SystemWindowManager>();
        cc::ISystemWindow *window = windowMgr->getWindowFromANativeWindow(nativeWindow);

        cc::events::WindowDestroy::broadcast(window->getWindowId());
    };
    CC_CURRENT_ENGINE()->getScheduler()->performFunctionInCocosThread(func);
}

// NOLINTNEXTLINE
JNIEXPORT void JNICALL
Java_com_cocos_lib_CocosTouchHandler_handleActionDown(JNIEnv *env, // NOLINT JNI function name
                                                      jobject obj,
                                                      jint windowId,
                                                      jint id,
                                                      jfloat x,
                                                      jfloat y) {
    CC_UNUSED_PARAM(env);
    CC_UNUSED_PARAM(obj);

    touchEvent.windowId = windowId;
    touchEvent.type = cc::TouchEvent::Type::BEGAN;
    touchEvent.touches.emplace_back(x, y, id);
    cc::events::Touch::broadcast(touchEvent);
    touchEvent.touches.clear();
}

// NOLINTNEXTLINE
JNIEXPORT void JNICALL Java_com_cocos_lib_CocosTouchHandler_handleActionUp(JNIEnv *env, // NOLINT JNI function name
                                                                           jobject obj,
                                                                           jint windowId,
                                                                           jint id,
                                                                           jfloat x,
                                                                           jfloat y) {
    CC_UNUSED_PARAM(env);
    CC_UNUSED_PARAM(obj);

    touchEvent.windowId = windowId;
    touchEvent.type = cc::TouchEvent::Type::ENDED;
    touchEvent.touches.emplace_back(x, y, id);
    cc::events::Touch::broadcast(touchEvent);
    touchEvent.touches.clear();
}

// NOLINTNEXTLINE
JNIEXPORT void JNICALL Java_com_cocos_lib_CocosTouchHandler_handleActionMove(JNIEnv *env, // NOLINT JNI function name
                                                                             jobject obj,
                                                                             jint windowId,
                                                                             jintArray ids,
                                                                             jfloatArray xs,
                                                                             jfloatArray ys) {
    CC_UNUSED_PARAM(obj);

    touchEvent.windowId = windowId;
    touchEvent.type = cc::TouchEvent::Type::MOVED;
    int size = env->GetArrayLength(ids);
    jint id[size];
    jfloat x[size];
    jfloat y[size];

    env->GetIntArrayRegion(ids, 0, size, id);
    env->GetFloatArrayRegion(xs, 0, size, x);
    env->GetFloatArrayRegion(ys, 0, size, y);
    for (int i = 0; i < size; i++) {
        touchEvent.touches.emplace_back(x[i], y[i], id[i]);
    }

    cc::events::Touch::broadcast(touchEvent);
    touchEvent.touches.clear();
}

// NOLINTNEXTLINE
JNIEXPORT void JNICALL Java_com_cocos_lib_CocosTouchHandler_handleActionCancel(JNIEnv *env, // NOLINT JNI function name
                                                                               jobject obj,
                                                                               jint windowId,
                                                                               jintArray ids,
                                                                               jfloatArray xs,
                                                                               jfloatArray ys) {
    CC_UNUSED_PARAM(obj);

    touchEvent.windowId = windowId;
    touchEvent.type = cc::TouchEvent::Type::CANCELLED;
    int size = env->GetArrayLength(ids);
    jint id[size];
    jfloat x[size];
    jfloat y[size];

    env->GetIntArrayRegion(ids, 0, size, id);
    env->GetFloatArrayRegion(xs, 0, size, x);
    env->GetFloatArrayRegion(ys, 0, size, y);
    for (int i = 0; i < size; i++) {
        touchEvent.touches.emplace_back(x[i], y[i], id[i]);
    }
    cc::events::Touch::broadcast(touchEvent);
    touchEvent.touches.clear();
}
}