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/*
Minetest
Copyright (C) 2013, 2017 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <ctime>
#include <mutex>
#include "mapblock_mesh.h"
#include "threading/mutex_auto_lock.h"
#include "util/thread.h"
struct CachedMapBlockData
{
v3s16 p = v3s16(-1337, -1337, -1337);
MapNode *data = nullptr; // A copy of the MapBlock's data member
int refcount_from_queue = 0;
std::time_t last_used_timestamp = std::time(0);
CachedMapBlockData() = default;
~CachedMapBlockData();
};
struct QueuedMeshUpdate
{
v3s16 p = v3s16(-1337, -1337, -1337);
bool ack_block_to_server = false;
bool urgent = false;
int crack_level = -1;
v3s16 crack_pos;
MeshMakeData *data = nullptr; // This is generated in MeshUpdateQueue::pop()
QueuedMeshUpdate() = default;
~QueuedMeshUpdate();
};
/*
A thread-safe queue of mesh update tasks and a cache of MapBlock data
*/
class MeshUpdateQueue
{
enum UpdateMode
{
FORCE_UPDATE,
SKIP_UPDATE_IF_ALREADY_CACHED,
};
public:
MeshUpdateQueue(Client *client);
~MeshUpdateQueue();
// Caches the block at p and its neighbors (if needed) and queues a mesh
// update for the block at p
void addBlock(Map *map, v3s16 p, bool ack_block_to_server, bool urgent);
// Returned pointer must be deleted
// Returns NULL if queue is empty
QueuedMeshUpdate *pop();
u32 size()
{
MutexAutoLock lock(m_mutex);
return m_queue.size();
}
private:
Client *m_client;
std::vector<QueuedMeshUpdate *> m_queue;
std::set<v3s16> m_urgents;
std::map<v3s16, CachedMapBlockData *> m_cache;
std::mutex m_mutex;
// TODO: Add callback to update these when g_settings changes
bool m_cache_enable_shaders;
bool m_cache_smooth_lighting;
int m_meshgen_block_cache_size;
CachedMapBlockData *cacheBlock(Map *map, v3s16 p, UpdateMode mode,
size_t *cache_hit_counter = NULL);
CachedMapBlockData *getCachedBlock(const v3s16 &p);
void fillDataFromMapBlockCache(QueuedMeshUpdate *q);
void cleanupCache();
};
struct MeshUpdateResult
{
v3s16 p = v3s16(-1338, -1338, -1338);
MapBlockMesh *mesh = nullptr;
bool ack_block_to_server = false;
MeshUpdateResult() = default;
};
class MeshUpdateThread : public UpdateThread
{
public:
MeshUpdateThread(Client *client);
// Caches the block at p and its neighbors (if needed) and queues a mesh
// update for the block at p
void updateBlock(Map *map, v3s16 p, bool ack_block_to_server, bool urgent);
v3s16 m_camera_offset;
MutexedQueue<MeshUpdateResult> m_queue_out;
private:
MeshUpdateQueue m_queue_in;
// TODO: Add callback to update these when g_settings changes
int m_generation_interval;
protected:
virtual void doUpdate();
};
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