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@menduz
Forked from terryjsmith/scriptsystem.cpp
Created September 23, 2020 20:03
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#include <eternity.hpp>
ScriptSystem::ScriptSystem() {
m_platform = 0;
m_isolate = 0;
m_scriptableCount = 0;
m_scriptablePoolSize = 0;
m_scriptables = 0;
}
ScriptSystem::~ScriptSystem() {
if (m_isolate) {
m_isolate = 0;
}
if (m_platform) {
delete m_platform;
m_platform = 0;
}
}
void ScriptSystem::Initialize() {
v8::V8::InitializeICU();
v8::V8::Initialize();
v8::Platform* platform = v8::platform::CreateDefaultPlatform();
v8::V8::InitializePlatform(platform);
v8::V8::Initialize();
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = v8::ArrayBuffer::Allocator::NewDefaultAllocator();
m_isolate = v8::Isolate::New(create_params);
v8::Isolate::Scope isolate_scope(m_isolate);
m_isolate->Enter();
}
void ScriptSystem::Shutdown() {
m_isolate->Dispose();
v8::V8::Dispose();
v8::V8::ShutdownPlatform();
}
void ScriptSystem::Update(float delta) {
for(int i = 0; i < m_scriptablePoolSize; i++) {
if(m_scriptables[i]) {
// Execute script
Script* script = m_scriptables[i]->GetScript();
script->Execute();
}
}
}
void ScriptSystem::AddScriptable(Scriptable *scriptable) {
bool resize = false;
// If this is our first resource (or we're empty), set the pool size
if(m_scriptableCount == 0) {
m_scriptablePoolSize = SCRIPT_POOL_INCREMENT;
resize = true;
}
// Increment the resource count
unsigned int newScriptableCount = m_scriptableCount + 1;
// If this is bigger than the pool size, increase the pool size
if(newScriptableCount > m_scriptablePoolSize) {
m_scriptablePoolSize += SCENE_POOL_INCREMENT;
resize = true;
}
if(resize) {
Scriptable** pool = (Scriptable**)malloc(sizeof(Scriptable*) * m_scriptablePoolSize);
memset(pool, 0, sizeof(Scriptable*) * m_scriptablePoolSize);
memcpy(pool, m_scriptables, sizeof(Scriptable*) * m_scriptableCount);
free(m_scriptables);
m_scriptables = pool;
}
m_scriptables[m_scriptableCount] = scriptable;
m_scriptableCount = newScriptableCount;
}
void ScriptSystem::RemoveScriptable(Scriptable *scriptable) {
for(unsigned int i = 0; i < m_scriptableCount; i++) {
if(m_scriptables[i] == scriptable) {
m_scriptableCount--;
memcpy(m_scriptables + i, m_scriptables + i + 1, sizeof(Scriptable*) * (m_scriptableCount - i));
m_scriptables[m_scriptableCount] = 0;
return;
}
}
}
/**
* Our scripting system which executes JavaScript scripts
*/
class ScriptSystem : public System {
public:
ScriptSystem();
~ScriptSystem();
/**
* Initialize the scripting library (V8)
*/
void Initialize();
/**
* Shutdown the scripting library
*/
void Shutdown();
/**
* Execute attach scripts
*/
void Update(float delta);
/**
* Add a scriptable component to the system
*/
void AddScriptable(Scriptable* scriptable);
/**
* Remove a scriptable component from the system
*/
void RemoveScriptable(Scriptable* scriptable);
protected:
v8::Platform* m_platform;
v8::Isolate* m_isolate;
Scriptable** m_scriptables;
unsigned int m_scriptableCount;
unsigned int m_scriptablePoolSize;
};
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