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Diffstat (limited to 'platform/android/jni_utils.h')
| -rw-r--r-- | platform/android/jni_utils.h | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/platform/android/jni_utils.h b/platform/android/jni_utils.h new file mode 100644 index 0000000000..925340a680 --- /dev/null +++ b/platform/android/jni_utils.h @@ -0,0 +1,242 @@ +/*************************************************************************/ +/* jni_utils.h */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#ifndef JNI_UTILS_H +#define JNI_UTILS_H + +#include "string_android.h" +#include <core/engine.h> +#include <core/variant.h> +#include <jni.h> + +struct jvalret { + + jobject obj; + jvalue val; + jvalret() { obj = NULL; } +}; + +jvalret _variant_to_jvalue(JNIEnv *env, Variant::Type p_type, const Variant *p_arg, bool force_jobject = false); + +String _get_class_name(JNIEnv *env, jclass cls, bool *array); + +Variant _jobject_to_variant(JNIEnv *env, jobject obj); + +Variant::Type get_jni_type(const String &p_type); + +const char *get_jni_sig(const String &p_type); + +class JNISingleton : public Object { + + GDCLASS(JNISingleton, Object); + + struct MethodData { + + jmethodID method; + Variant::Type ret_type; + Vector<Variant::Type> argtypes; + }; + + jobject instance; + Map<StringName, MethodData> method_map; + +public: + virtual Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) { + + ERR_FAIL_COND_V(!instance, Variant()); + + r_error.error = Callable::CallError::CALL_OK; + + Map<StringName, MethodData>::Element *E = method_map.find(p_method); + if (!E) { + + r_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD; + return Variant(); + } + + int ac = E->get().argtypes.size(); + if (ac < p_argcount) { + + r_error.error = Callable::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS; + r_error.argument = ac; + return Variant(); + } + + if (ac > p_argcount) { + + r_error.error = Callable::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS; + r_error.argument = ac; + return Variant(); + } + + for (int i = 0; i < p_argcount; i++) { + + if (!Variant::can_convert(p_args[i]->get_type(), E->get().argtypes[i])) { + + r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT; + r_error.argument = i; + r_error.expected = E->get().argtypes[i]; + } + } + + jvalue *v = NULL; + + if (p_argcount) { + + v = (jvalue *)alloca(sizeof(jvalue) * p_argcount); + } + + JNIEnv *env = ThreadAndroid::get_env(); + + int res = env->PushLocalFrame(16); + + ERR_FAIL_COND_V(res != 0, Variant()); + + List<jobject> to_erase; + for (int i = 0; i < p_argcount; i++) { + + jvalret vr = _variant_to_jvalue(env, E->get().argtypes[i], p_args[i]); + v[i] = vr.val; + if (vr.obj) + to_erase.push_back(vr.obj); + } + + Variant ret; + + switch (E->get().ret_type) { + + case Variant::NIL: { + + env->CallVoidMethodA(instance, E->get().method, v); + } break; + case Variant::BOOL: { + + ret = env->CallBooleanMethodA(instance, E->get().method, v) == JNI_TRUE; + } break; + case Variant::INT: { + + ret = env->CallIntMethodA(instance, E->get().method, v); + } break; + case Variant::FLOAT: { + + ret = env->CallFloatMethodA(instance, E->get().method, v); + } break; + case Variant::STRING: { + + jobject o = env->CallObjectMethodA(instance, E->get().method, v); + ret = jstring_to_string((jstring)o, env); + env->DeleteLocalRef(o); + } break; + case Variant::PACKED_STRING_ARRAY: { + + jobjectArray arr = (jobjectArray)env->CallObjectMethodA(instance, E->get().method, v); + + ret = _jobject_to_variant(env, arr); + + env->DeleteLocalRef(arr); + } break; + case Variant::PACKED_INT32_ARRAY: { + + jintArray arr = (jintArray)env->CallObjectMethodA(instance, E->get().method, v); + + int fCount = env->GetArrayLength(arr); + Vector<int> sarr; + sarr.resize(fCount); + + int *w = sarr.ptrw(); + env->GetIntArrayRegion(arr, 0, fCount, w); + ret = sarr; + env->DeleteLocalRef(arr); + } break; + case Variant::PACKED_FLOAT32_ARRAY: { + + jfloatArray arr = (jfloatArray)env->CallObjectMethodA(instance, E->get().method, v); + + int fCount = env->GetArrayLength(arr); + Vector<float> sarr; + sarr.resize(fCount); + + float *w = sarr.ptrw(); + env->GetFloatArrayRegion(arr, 0, fCount, w); + ret = sarr; + env->DeleteLocalRef(arr); + } break; + +#ifndef _MSC_VER +#warning This is missing 64 bits arrays, I have no idea how to do it in JNI +#endif + case Variant::DICTIONARY: { + + jobject obj = env->CallObjectMethodA(instance, E->get().method, v); + ret = _jobject_to_variant(env, obj); + env->DeleteLocalRef(obj); + + } break; + default: { + + env->PopLocalFrame(NULL); + ERR_FAIL_V(Variant()); + } break; + } + + while (to_erase.size()) { + env->DeleteLocalRef(to_erase.front()->get()); + to_erase.pop_front(); + } + + env->PopLocalFrame(NULL); + + return ret; + } + + jobject get_instance() const { + + return instance; + } + void set_instance(jobject p_instance) { + + instance = p_instance; + } + + void add_method(const StringName &p_name, jmethodID p_method, const Vector<Variant::Type> &p_args, Variant::Type p_ret_type) { + + MethodData md; + md.method = p_method; + md.argtypes = p_args; + md.ret_type = p_ret_type; + method_map[p_name] = md; + } + + JNISingleton() { + instance = NULL; + } +}; + +#endif // JNI_UTILS_H |