242 lines
6.8 KiB
C++
242 lines
6.8 KiB
C++
/*************************************************************************/
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/* jni_utils.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef JNI_UTILS_H
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#define JNI_UTILS_H
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#include "string_android.h"
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#include <core/engine.h>
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#include <core/variant.h>
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#include <jni.h>
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struct jvalret {
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jobject obj;
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jvalue val;
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jvalret() { obj = nullptr; }
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};
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jvalret _variant_to_jvalue(JNIEnv *env, Variant::Type p_type, const Variant *p_arg, bool force_jobject = false);
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String _get_class_name(JNIEnv *env, jclass cls, bool *array);
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Variant _jobject_to_variant(JNIEnv *env, jobject obj);
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Variant::Type get_jni_type(const String &p_type);
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const char *get_jni_sig(const String &p_type);
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class JNISingleton : public Object {
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GDCLASS(JNISingleton, Object);
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struct MethodData {
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jmethodID method;
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Variant::Type ret_type;
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Vector<Variant::Type> argtypes;
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};
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jobject instance;
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Map<StringName, MethodData> method_map;
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public:
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virtual Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) {
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ERR_FAIL_COND_V(!instance, Variant());
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r_error.error = Callable::CallError::CALL_OK;
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Map<StringName, MethodData>::Element *E = method_map.find(p_method);
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if (!E) {
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r_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD;
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return Variant();
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}
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int ac = E->get().argtypes.size();
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if (ac < p_argcount) {
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r_error.error = Callable::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
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r_error.argument = ac;
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return Variant();
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}
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if (ac > p_argcount) {
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r_error.error = Callable::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS;
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r_error.argument = ac;
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return Variant();
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}
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for (int i = 0; i < p_argcount; i++) {
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if (!Variant::can_convert(p_args[i]->get_type(), E->get().argtypes[i])) {
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r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT;
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r_error.argument = i;
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r_error.expected = E->get().argtypes[i];
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}
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}
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jvalue *v = nullptr;
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if (p_argcount) {
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v = (jvalue *)alloca(sizeof(jvalue) * p_argcount);
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}
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JNIEnv *env = ThreadAndroid::get_env();
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int res = env->PushLocalFrame(16);
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ERR_FAIL_COND_V(res != 0, Variant());
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List<jobject> to_erase;
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for (int i = 0; i < p_argcount; i++) {
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jvalret vr = _variant_to_jvalue(env, E->get().argtypes[i], p_args[i]);
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v[i] = vr.val;
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if (vr.obj)
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to_erase.push_back(vr.obj);
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}
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Variant ret;
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switch (E->get().ret_type) {
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case Variant::NIL: {
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env->CallVoidMethodA(instance, E->get().method, v);
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} break;
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case Variant::BOOL: {
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ret = env->CallBooleanMethodA(instance, E->get().method, v) == JNI_TRUE;
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} break;
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case Variant::INT: {
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ret = env->CallIntMethodA(instance, E->get().method, v);
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} break;
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case Variant::FLOAT: {
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ret = env->CallFloatMethodA(instance, E->get().method, v);
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} break;
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case Variant::STRING: {
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jobject o = env->CallObjectMethodA(instance, E->get().method, v);
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ret = jstring_to_string((jstring)o, env);
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env->DeleteLocalRef(o);
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} break;
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case Variant::PACKED_STRING_ARRAY: {
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jobjectArray arr = (jobjectArray)env->CallObjectMethodA(instance, E->get().method, v);
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ret = _jobject_to_variant(env, arr);
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env->DeleteLocalRef(arr);
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} break;
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case Variant::PACKED_INT32_ARRAY: {
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jintArray arr = (jintArray)env->CallObjectMethodA(instance, E->get().method, v);
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int fCount = env->GetArrayLength(arr);
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Vector<int> sarr;
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sarr.resize(fCount);
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int *w = sarr.ptrw();
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env->GetIntArrayRegion(arr, 0, fCount, w);
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ret = sarr;
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env->DeleteLocalRef(arr);
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} break;
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case Variant::PACKED_FLOAT32_ARRAY: {
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jfloatArray arr = (jfloatArray)env->CallObjectMethodA(instance, E->get().method, v);
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int fCount = env->GetArrayLength(arr);
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Vector<float> sarr;
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sarr.resize(fCount);
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float *w = sarr.ptrw();
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env->GetFloatArrayRegion(arr, 0, fCount, w);
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ret = sarr;
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env->DeleteLocalRef(arr);
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} break;
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#ifndef _MSC_VER
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#warning This is missing 64 bits arrays, I have no idea how to do it in JNI
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#endif
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case Variant::DICTIONARY: {
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jobject obj = env->CallObjectMethodA(instance, E->get().method, v);
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ret = _jobject_to_variant(env, obj);
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env->DeleteLocalRef(obj);
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} break;
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default: {
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env->PopLocalFrame(nullptr);
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ERR_FAIL_V(Variant());
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} break;
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}
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while (to_erase.size()) {
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env->DeleteLocalRef(to_erase.front()->get());
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to_erase.pop_front();
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}
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env->PopLocalFrame(nullptr);
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return ret;
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}
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jobject get_instance() const {
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return instance;
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}
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void set_instance(jobject p_instance) {
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instance = p_instance;
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}
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void add_method(const StringName &p_name, jmethodID p_method, const Vector<Variant::Type> &p_args, Variant::Type p_ret_type) {
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MethodData md;
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md.method = p_method;
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md.argtypes = p_args;
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md.ret_type = p_ret_type;
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method_map[p_name] = md;
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}
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JNISingleton() {
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instance = nullptr;
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}
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};
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#endif // JNI_UTILS_H
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