src/client/minimap.cpp


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/*
Minetest
Copyright (C) 2010-2015 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.
*/

#include "minimap.h"
#include <cmath>
#include "client.h"
#include "clientmap.h"
#include "settings.h"
#include "shader.h"
#include "mapblock.h"
#include "client/renderingengine.h"
#include "gettext.h"

////
//// MinimapUpdateThread
////

MinimapUpdateThread::~MinimapUpdateThread()
{
	for (auto &it : m_blocks_cache) {
		delete it.second;
	}

	for (auto &q : m_update_queue) {
		delete q.data;
	}
}

bool MinimapUpdateThread::pushBlockUpdate(v3s16 pos, MinimapMapblock *data)
{
	MutexAutoLock lock(m_queue_mutex);

	// Find if block is already in queue.
	// If it is, update the data and quit.
	for (QueuedMinimapUpdate &q : m_update_queue) {
		if (q.pos == pos) {
			delete q.data;
			q.data = data;
			return false;
		}
	}

	// Add the block
	QueuedMinimapUpdate q;
	q.pos  = pos;
	q.data = data;
	m_update_queue.push_back(q);

	return true;
}

bool MinimapUpdateThread::popBlockUpdate(QueuedMinimapUpdate *update)
{
	MutexAutoLock lock(m_queue_mutex);

	if (m_update_queue.empty())
		return false;